DEPARTMENT OF ENVIRONMENTAL QUALITY

                   WASTE AND HAZARDOUS MATERIALS DIVISION

     STORAGE AND HANDLING OF GASEOUS AND LIQUEFIED HYDROGEN SYSTEMS

(By authority conferred on the department of environmental quality by section 
3c of 1941 PA 207, MCL 29.3c, and Executive Reorganization Order No.  1998-2, 
MCL 29.461)


                         PART 1.  GENERAL PROVISIONS

R 29.7001  Applicability.
  Rule 1. These  rules  apply  to  the   operation   of   all   gaseous   and 
Liquefied hydrogen systems.  A person shall comply with  these  rules,  other 
applicable state  and federal statutes, and rules and regulations promulgated 
under the statutes.

  History: 2008 AACS.


R 29.7002  Storage and handling of gaseous and Liquefied  hydrogen;  adoption 
of standard by reference.
  Rule 2. The national  fire  protection  association's    (NFPA)    Pamphlet 
50A, "Standard for Gaseous Hydrogen Systems at Consumer Sites," 1999  edition
 and NFPA Pamphlet 50B, "Standard  for  Liquefied   Hydrogen    Systems    at 
Consumer Sites," 1999 edition, referred to in  these  rules  as  the  "code," 
pertaining to the storage and handling, but not transportation,  of   gaseous 
and  Liquefied hydrogen, are adopted by reference as part of these  rules.
Copies  of  the adopted code are available for inspection at  the  office  of 
the Department  of  Environmental  Quality,  Waste  and  Hazardous  Materials 
Division,  Storage  Tank Unit, P.O. Box 30241, Lansing, Michigan  48909-7741, 
or for purchase from   the  National     Fire     Protection     Association, 
Batterymarch    Park,     Quincy,  Massachusetts  02269,   telephone   number 
800-344-3555.  The cost of the code, at the time of the adoption,  is  $28.00 
each, plus a $7.95 handling  charge,  per copy;  or  at  the  office  of  the 
Department of Environmental Quality, Waste  and Hazardous Materials Division, 
Storage Tank Unit,  P.O.  Box  30241,  Lansing, Michigan  48909-7741,  for  a 
cost, at the time of the adoption of these  rules, of $35.95, per copy,  plus 
$20.00 handling, plus shipping.

  History: 2008 AACS.


             PART 2.  STORAGE AND HANDLING OF GASEOUS HYDROGEN NFPA 50A

                           Chapter 1 General Information

R 29.7010  Chapter 1 General information.
  Rule 10. Sections 1-1 to 1-1.2 of the storage and  handling   of    gaseous 
and Liquefied hydrogen code are added as follows:
1-1 Scope. This standard covers the  requirements  for  the  design,  siting, 
construction, installation, operation, maintenance,  and  dispensing  from  a 
gaseous hydrogen system.
1-1.1 Nothing in this hydrogen code shall be intended to prevent the  use  of 
systems, methods, or devices of equivalent  or  superior  quality,  strength, 
fire  resistance,   effectiveness,   durability,   environmental   protection 
capability, or safety  over  those  prescribed  by  this  hydrogen  code,  if 
technical  documentation  is  submitted  to  the  department  to  demonstrate 
equivalency and the system, method, or device is approved  for  the  intended 
purpose.
1-1.2 This code shall apply to the design and installation of  compressed  H2 
dispensing systems.
Exception:  Dispensing to rail and aircraft.

  History: 2008 AACS.


R 29.7011  Classification.
  Rule 11. Section 1-2 is reproduced from NFPA 50A as follows:
1-2 Classification.  Systems are classified according to the total volume  of 
hydrogen, including unconnected reserves, as follows:
  (a) Less than 3500 scf (99 m3), except as covered in 1-3.1 
  (b)  From   3500 (99 m3) to 15,000 scf (425 m3) 
  (c) In excess of 15,000 scf (425 m3)

  History: 2008 AACS.


R 29.7012  Application.
  Rule 12. Section 1-3.2 is reproduced from NFPA  50A,  and   sections   1-3, 
1-3.1, 1-3.3, 1-3.4, and 1-3.5 of the storage and handling of   gaseous   and 
Liquefied H2 code are added as follows:
1-3 Application.
1-3.1 The application of this standard at places  of  public  assembly  shall 
meet the requirements of section 3-2.2(a) and the approval of the department.
1-3.2 This standard shall not apply to single systems using containers having 
a total H2 content of less than 400 scf (11 m3).  Where  individual  systems, 
each having a total H2 content of less than 400 scf (11 m3), are located less 
than 5 ft (1.5 m) from each other, this standard shall apply.
1-3.3 This standard does not apply to flow-through process containers.
1-3.4 When required by the department,  H2  introduced  into  any   system    
covered  by this code shall have a leak detection system acceptable  to  the  
department and based on the best interest  of  public  health,  safety,  and 
welfare and  the environment.
1-3.5 Gaseous H2 in fuel tanks on vehicles and mobile equipment shall not  be 
included in determining the maximum allowable quantities.

  History: 2008 AACS.


R 29.7013  Retroactivity.
  Rule 13. Sections 1-4 and 1-4.1 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-4 Retroactivity.
1-4.1 The provisions of this H2 code are necessary to  provide  a  reasonable 
level of protection from loss of life and property from fire and explosion.
The provisions shall reflect situations and the state of  the  art  prevalent 
when the H2 code was issued.  Unless otherwise noted, it is not intended that 
the  provisions  of  this  H2  code  be  applied  to  facilities,  equipment, 
structures, or installations that were existing or approved for  construction 
or installation before the effective date of this H2 code,  except  in  those 
cases where it is determined by the department that  the  existing  situation 
involves a distinct hazard to public health, safety,  adjacent  property,  or 
the environment.

  History: 2008 AACS.


R 29.7014  Definitions.
  Rule 14. Section 1-5 of the storage and handling of gaseous  and  Liquefied 
H2 code is added, and Section 1-5.1 is reproduced from NFPA 50A as follows:
1-5 Definitions.
  (a) "ANSI" means the american national standards institute.
  (b) "Approved" means acceptable to the department.
  (c) "ASME" means the american society of mechanical engineers.
  (d) "Authority having jurisdiction" means the department.
  (e)  "Automatic   emergency   shutoff   valve"    means    a     designated 
fail-safe automatic closing valve designed to shutoff the flow  of  gases  or 
liquids that is initiated by a control system where the control   system   is 
activated  by either manual or automatic means.
  (f) "Bulk  storage"  means  a  single  container  or   containers,    where 
all containers draw down at the same time.
  (g) "Cargo transport  container"  means  a  mobile   unit    designed    to 
transport gaseous or liquefied H2.
  (h) "Cascade   storage   system"   means   storage   in    containers    or 
cylinders arranged in banks where each bank acts as 1 large  container.   The 
banks  are separated by switching valves to provide  sequential  drawdown  of 
the  banks.
The bank may consist of 1 or more containers or cylinders.
  (i) "Cathodic protection" means a technique to prevent  the  corrosion   of 
a metal surface by making the surface the cathode of an electrochemical cell.
This protection renders a metallic container or piping  component  negatively 
charged with respect to its environment.  This protection shall  be  designed 
by a corrosion expert as defined by these rules.
  (j) "Cathodic protection tester"  means  a  person  who   can   demonstrate 
an understanding of the principles and  measurements  of  all  common   types 
of cathodic protection systems applicable to  metal  piping   and   container 
systems and who has education and experience  in  soil   resistivity,   stray 
current, structure-to-soil potential, and  component   electrical   isolation 
measurements of metal piping and container systems.  The  person   shall   be 
certified  as being qualified by the national  association    of    corrosion 
engineers  (NACE) international.
  (k) "Composite container"  means  a  container  fabricated  of  2  or  more 
materials that interact to facilitate the container design criteria.
  (l) "Compression discharge pressure" means the varying  pressure   at   the 
point of discharge from the compressor.
  (m) "CGA" means the compressed gas association.
  (n) "Container" means a pressure vessel or cylinder used to store H2.
  (o) "Container  appurtenances"  means  devices  connected   to    container 
openings for safety, control, or operating purposes.
  (p) "Container system" means a container or combination of  containers  and 
all attached appurtenances, valves, and piping.
  (q) "Container valve"  means  a   valve   connected   directly    to    the 
container outlet.
  (r) "Continuous gas detection system" means a gas  detection   system    in 
which the instrument is maintained in continuous operation.
  (s) "Corrosion expert" means a person who, by reason of thorough  knowledge 
of the  physical  sciences  and   the   principals   of    engineering    and 
mathematics acquired by a professional education  and    related    practical 
experience,  is qualified to  engage   in   the   practice    of    corrosion 
control  of  container systems.  The person shall be  certificated  as  being 
qualified by NACE,  as  a senior   corrosion   technologist,    a    cathodic 
protection  specialist,  or   a  corrosion  specialist  or  be  a  registered 
engineer who  has  certification  and licensing that includes  education  and 
experience in corrosion control.
  (t) "Corrosion protection" means protecting a container system  to  prevent 
the degradation of  the  metal  through  oxidation  or  reactivity  with  its 
environment.
  (u) "Cylinder" means a container constructed  in  accordance    with    the 
United States Department of Transportation (U.S. DOT)  specifications,  title 
49, code of federal regulations (CFR), parts 171-190.
  (v) "Department" means the department of environmental quality.
  (w) "Director" means  the  director  of  the  department  of  environmental 
quality.
  (x) "Dispensing station" means an H2  installation  that    dispenses    H2 
from  storage  containers  into  fuel  supply  containers  or  into  portable 
cylinders  by means of a compressor, reformer, vaporizer, or pressure booster.
  (y) "Emergency shutdown device (ESD)" means  a  device  that   closes   all 
fueling operations within the fueling facility from either  local  or  remote 
locations.
  (z) "Excess flow control" means to limit or stop the flow of H2  gas   from 
a source of  supply  when  there  is  a  rupture,  break,  or   'open   valve 
to atmosphere'  condition  that  may  present  a  hazard  to   personnel   or 
the environment.
  (aa) "Fail-safe" means a design feature that provides for  the  maintenance 
of safe operating conditions in the event of a malfunction of control devices 
or an interruption of an energy source.
  (bb) "Fast fill station" means a storage and dispensing   system   designed 
to fill motor vehicle fuel tanks with compressed, gasified H2.   The  vehicle 
fuel tank is filled by connecting to a system designed to provide a fuel fill 
rate above 12 scfm.
  (cc) "Fixed liquid level device" means  a  device  that   indicates    when 
the container is filled to its maximum permitted liquid filling volume.
  (dd) "Flow-through  process  container"  means  a  container   that   forms 
an integral part of a production  process  through   which   there    is    a 
steady, variable, recurring, or intermittent flow of materials  during    the 
operation of the process and the container is utilized to  carry    out    or 
control  the heating,  cooling,  mixing,  blending,   separating,   metering, 
or   chemical reaction of materials.  The processing is  done  on  a  regular 
basis and  it  is the primary function  of  the  container.   A  flow-through 
process container does not include a container that is used for  the  storage 
of materials before  its introduction into the production process   or    for 
the  storage  of   finished  products  or  by-products  from  the  production 
process or a  container  that  is only used to recirculate materials.
  (ee) "Fuel dispenser system" means all the pumps, meters,  piping,    hose, 
and controls used for the delivery of fuel.
  (ff) "Fueling connector" means  a  mating   device   at    the    refueling 
station, including shutoff valves that connect  the  fueling  dispenser  hose
 to  the vehicle fuel filling system receptacle for the transfer of liquid or 
vapor.
  (gg)  "Gallon water capacity (wc)" means the amount of water in gallons  at 
60 degrees Fahrenheit (15 degrees Celsius) required to fill a container.
  (hh) "Gas detection system" means a grouping of 1 or more  sensors  capable 
of detecting an H2 leak at specified concentrations and   activating   alarms 
and safety systems.
  (ii) "Gaseous H2 system" means a system  in  which  the  H2  is  delivered, 
stored, and discharged in the gaseous form including the piping system.   The 
gaseous H2 system terminates at the point where the H2 is dispensed.
  (jj) "Hydrogen (H2)" means the simplest and lightest   element    in    the 
known universe, which exists as a gas except at low cryogenic temperatures.
H2 gas is a colorless, odorless and highly  flammable  gas  when  mixed  with 
oxygen over a  wide  range  of  concentrations.   H2   forms    water    when 
combusted,  or  when otherwise joined with oxygen, as within a fuel cell.
  (kk) "Hydrogen code" means  the  storage  and  handling  of   gaseous   and 
liquefied H2 rules as promulgated by the department.
  (ll) "Hydrogen gas vehicle (HGV) or vehicle" means a self-propelled  device 
on land, in, on, or by which any person or property is or may be  transported 
or drawn upon, except  for a device exclusively moved by human   power,   and 
which has the capability to use H2 gas as an engine fuel.
  (mm)  "Ignition source" means any item or   substance   capable    of    an 
energy release of type and magnitude sufficient  to  ignite   any   flammable 
mixture  of gases or vapors that could occur at the site.
  (nn) "kPa" means absolute pressure in kilo-Pascals.
  (oo) "kPag" means gauge pressure in kilo-Pascals.
  (pp) "Labeled"  means equipment or materials to which  has  been   attached 
a label,  symbol,  or  other  identifying  mark  of  an   organization   that 
is acceptable to the department and  concerned  with   product    evaluation, 
that maintains  periodic  inspection  of  production  of  labeled   equipment
  or materials, and by whose labeling the manufacturer indicates   compliance 
with accepted or approved standards of construction and or performance.
  (qq)  "Listed" means equipment, materials, or services  included    in    a 
list published by an  organization  that  is  acceptable  to  the  department
 and concerned with evaluation of products or  services,    that    maintains 
periodic inspection of production listed equipment or materials  or  periodic 
evaluation of services, and whose listing states that either  the  equipment, 
material, or service meets  appropriate  designated  standards  or  has  been 
tested  and  found suitable for a specified purpose.
  (rr) "Manifolded storage system" means  storage  in   containers   arranged 
in banks where each bank acts as 1 large container.  The banks are  separated 
by switching valves to provide sequential drawdown of the banks.   The   bank 
may consist of 1 or more containers.
  (ss) "Manual emergency shutoff valve" means a designated   valve   designed 
to shutoff flow due to a rupture in pressurized piping system.
  (tt) "Maximum allowable  working  pressure  (MAWP)"  means   the    maximum 
pressure to which any component or portion of  the  pressure  system  can  be 
subjected.
  (uu) "Maximum  operating  pressure  (MOP)"  means  the  steady-state  gauge 
pressure at which a part or system normally operates.
  (vv) "Metal hydride storage system" means a system for the storage  of   H2 
gas absorbed in solid material.
  (ww) "Motor fuel dispensing  facility"  means   that   portion    of    the 
property where H2 is stored and dispensed from fixed equipment into the  fuel 
tanks  of motor vehicles, marine craft,  or   into    approved    containers, 
including  all equipment used in connection therewith.
  (xx)   "NACE"   means   the    national    association     of     corrosion 
engineers, international.
  (yy)  "Original  equipment  manufacturer   (OEM)"   means    an    original 
equipment motor vehicle manufacturer that certifies that  the  motor  vehicle
 complies with applicable federal motor vehicle safety codes.
  (zz) "Partially buried container" means a container that  has   part    of, 
but less than 100%, of the container surface covered with earth.
  (aaa) "Point of transfer" means the point where the   transfer   connection 
is made.
  (bbb) "Portable container" means a container designed to be moved  readily, 
as distinguished  from  containers  designed  for  stationary  installations.
Portable containers, designed for transportation with  H2,  filled  to  their 
maximum filling limit, include  "cylinders,"  "cargo  tanks,"  and  "portable 
tanks," all 3 of which are defined separately.   Containers  designed  to  be 
readily moved from 1 usage location to another, but  substantially  empty  of 
product, are "portable storage containers" and are defined separately.
  (ccc) "Portable  storage  container"  means  a   container    similar    to 
those designed and constructed for stationary installation, designed so  that 
it can be moved readily over the highways, substantially empty of H2, from  1
 usage location to another.  Such containers either  have  legs   or    other 
supports attached, or are mounted on running gear,  such  as    trailer    or 
semitrailer chassis, with suitable supports that can be  of   the   fold-down 
type,  allowing them to be placed or parked in  a  stable  position   on    a 
reasonably  firm  and  level  surface.   For  large-volume,  limited-duration 
product usage, such as  at construction sites and normally  for   6    months 
or  less,  portable  storage  containers  function  in  lieu  of  permanently 
installed stationary containers.
  (ddd) "Portable tank, or skid tank" means a container of more  than   1,000 
lb (454 kilogram) water capacity used to  transport  H2,   handled    as    a 
package, that is, filled  to  its  maximum  permitted  filling  limit.   Such 
containers   are  mounted  on  skids  or  runners  and  have  all   container 
appurtenances protected in such a manner that they can be safely handled as a 
package.
  (eee)   "Pressure   relief   device   (PRD)"   means    a    pressure    or 
temperature activated device used to prevent pressure  from  rising  above  a 
specified value and  thereby  prevent  the  rupture  of  a  normally  charged 
pressure  vessel  or  a cylinder due to emergency or abnormal conditions.
  (fff) "Pressure vessel" means a container  or  other   component   designed 
in accordance with the ASME code.
  (ggg) "psi" means pounds per square inch.
  (hhh) "psia" means pounds per square inch, absolute.
  (iii) "psig" means pounds per square inch gauge.
  (jjj) "Rated pressure" means the pressure  to  which   a    component    is 
rated provided that the MAWP is observed for temperature extremes.
  (kkk) "Release" means an unexpected discharge of H2.
  (lll)  "Remotely located  manually  activated  shutdown  control"  means  a 
control system that is designed to initiate shut down of the flow of  gas  or
 liquid that is manually activated from  a  point  located   some    distance 
from  the delivery system.
  (mmm)  "Residential  fueling  facility"  means  a  listed  vehicle  fueling 
appliance used for the compression and delivery of H2  into  vehicles  at   a 
residence which includes its associated equipment and piping.
  (nnn) "Service pressure" means the nominal gas  pressure  at   a    uniform 
gas temperature of 70 degrees Fahrenheit  (21  degrees  Celsius)   when   the 
equipment is properly and completely charged with  gas;  the  nominal  design 
pressure  for which the equipment has been constructed.
  (ooo) "Set pressure" means the  start-to-discharge  pressure  for  which  a 
relief valve is set and marked.
  (ppp) "Standard cubic foot per minute (scfm)" means the amount of gas  flow 
in standard cubic feet per minute compensated for pressure and temperature.
  (qqq) "Substantially empty" means a gas container of H2 when  the  residual 
gas pressure is less than 10% of the maximum allowable working  pressure   of 
the vessel.
  (rrr) "Vehicle-fueling appliance" means a  self-contained  listed  assembly 
used for the compression and delivery  of  H2  gas  into  vehicles  including 
associated equipment and piping of the appliance.
1-5.1 NFPA official definitions.
Combustible Liquid. A liquid having a closed-cup flash point at or above 100o 
F (37.8oC) and are subdivided as follows:
  (a) Class II liquids include those having a flash point   at    or    above 
100°F (37.8°C) and below 140°F (60°C).
  (b) Class IIIA liquids include those having a flash point  at   or    above 
140°F (60°C) and below 200°F (93.4°C).
  (c) Class IIIB liquids include those having a flash point  at   or    above 
200°F (93.4°C).
Flammable Liquid (Class I). Any liquid having a closed-cup flash point  below 
100°F (37.8°C) and having a vapor pressure not exceeding 40 psia (276 kPa) at 
100°F (37.8°C).
Gallon. A standard U.S. gallon.
Limited-Combustible Material. A material, as defined in NFPA  220,   Standard 
on Types of Building Construction,  not  complying  with  the  definition  of 
noncombustible material that, in  the  form  in  which  it  is  used,  has  a 
potential heat value not exceeding 3500 Btu/lb (8141 kJ/kg) and complies with 
one of the following paragraphs (a) or (b). Materials subject to an  increase 
in  combustibility  or  flame  spread  rating,  beyond  the   limits   herein 
established, through the effects  of  age,  moisture,  or  other  atmospheric 
condition are considered combustible.
  (a)  Materials having a structural base of noncombustible  material,   with 
a surfacing not exceeding a thickness of 1/8 in. (3.2  mm)   that    has    a 
flame spread rating not greater than 50.
  (b)  Materials, in the form and thickness used, other than   as   described 
in (a), having neither a flame spread rating greater than  25  nor   evidence 
of continued progressive combustion and of such composition  that    surfaces 
that would be exposed by cutting through the material  on  any  plane   would 
have neither a flame spread rating greater  than   25   nor    evidence    of 
continued progressive combustion.
Noncombustible Material. A material, as defined  in  NFPA  220,  Standard  on 
Types of Building Construction, that, in the form in which  it  is  used  and 
under the conditions anticipated, will not ignite, burn, support  combustion, 
or release flammable  vapors  when  subjected  to  fire  or  heat.  Materials 
reported as noncombustible, when  tested  in  accordance  with  ASTM  E  136, 
Standard Method of Test for Behavior of Materials in a Vertical Tube  Furnace 
at 750°C, are considered noncombustible materials.
Outdoors. Location outside of any building or structure or locations under  a 
roof, weather shelter, or canopy provided this area is not enclosed  on  more 
than two sides.
Separate Building. A detached, noncommunicating building used exclusively  to 
house a hydrogen system.
Shall. Indicates a mandatory requirement.
Special Room. A separate enclosed area that is part of or attached to another 
building and is used exclusively for an H2 system.
Standard. A  document,  the  main  text  of  which  contains  only  mandatory 
provisions using the word "shall" to indicate requirements and which is in  a 
form generally suitable for mandatory reference by another standard  or  code 
or for adoption into law. Nonmandatory provisions  shall  be  located  in  an 
appendix, footnote, or fine-print note and are not to be considered a part of 
the requirements of a standard.
Standard Cubic Foot (scf). One cubic foot of gas at 70°F (21°C) and 14.7 psia 
(an absolute pressure of 101 kPa).

  History: 2008 AACS.


R 29.7015  Equivalency.
  Rule 15. Sections 1-6 to 1-6.3 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-6 Equivalency.
1-6.1 Nothing in this H2 code  shall  be  intended  to  prevent  the  use  of 
systems, methods, or devices having equivalent or superior quality, strength, 
fire  resistance,   effectiveness,   durability,   environmental   protection 
capability, or safety over those prescribed by  the  H2  code,  if  technical 
documentation is submitted to the department to demonstrate  equivalency  and 
the system, method, or device is approved for the intended purpose.
1-6.2 An owner or operator may make an application for a variance of rules by 
applying to the department with a satisfactory explanation of why  compliance 
is not possible.  The  department  may  approve  the  variance  request  upon 
finding that the variance is based upon the best interest of  public  health, 
safety, and welfare and the environment.
1-6.3 A person aggrieved by a final decision of the department on  a  request 
for variance or an equivalency determination may appeal to the circuit  court 
within 21 days of receiving the decision.

  History: 2008 AACS.


R 29.7016  Prohibitions.
  Rule 16. Sections 1-7 to 1-7.4 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-7 Prohibitions.
1-7.1 Any H2 storage container system or practice that is not  in  compliance 
with these rules shall be considered to be in violation of these rules.
1-7.2 Upon notification by the department, a person shall not deliver H2 to a 
storage container system under any circumstances that are prohibited by these 
rules or if a  container  is  not  in  compliance  with  these  rules.   Such 
notification may include a verbal or  written  communication  or  an  affixed 
written notification on the H2 system.
1-7.3 A  person  shall  not  tamper  with,  remove,  or   disregard   written 
notification affixed to the storage container system.
1-7.4 An owner or operator shall not continue  to  use  a  storage  container 
system that is causing a release and shall expeditiously empty the system  or 
the component that is causing the release until the  system  is  repaired  or 
replaced.

  History: 2008 AACS.


R 29.7017  Installation application.
  Rule 17. Sections 1-8 to 1-8.4 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-8 Installation application.
1-8.1 An application for plan review shall be submitted, on a  form  provided 
by the department, by the owner or owner's designee on behalf of the owner to 
the department not less than 30 days before the installation of an H2 storage 
container system.
1-8.1.1 The installation application  shall  include  all  of  the  following 
information:
  (a) A plot map showing all of the following within 100 feet  (30.5  meters) 
of any portion from the container system:
  (i) The location of the following:
  (A) Buildings.
  (B) Public roadways.
  (C) Railroad mainlines.
  (D) Public sidewalks.
  (E) Overhead power lines.
  (ii) The proposed location of the dispensing station.
  (iii) The location of property lines.
  (iv) The locations of  existing   aboveground   and    underground    tanks 
storing flammable and combustible liquids, and  flammable,   compressed    or 
liquefied gases.
  (v) The location of the point of transfer  in  relationship  to   all    of 
the following:
  (A) The container.
  (B) Buildings.
  (C) Public ways.
  (D) Outdoor places of public assembly.
  (E) Driveways.
  (F) Main line railroad track center lines.
  (G) The line of adjoining property that may be built upon.
  (H)  Aboveground  and   underground   tanks    storing    flammable     and 
combustible liquids and/or flammable, compressed, or liquefied gases.
  (b) The construction material,  the  dimensions  and  the    capacity    of 
each container.
  (c) The type of container venting and pressure relief.
  (d) The compressor(s) size (psig and scfm).
  (e) Container appurtenances.
  (f) A piping diagram showing sizes, valves, pressure relief  and  fittings, 
and control devices.
1-8.2  Upon acknowledged receipt of the plans, the department shall  issue  a 
plan review report within 30 days.  If the plan review report is  not  issued 
within 30  days,  the  installation  may  be  constructed  according  to  the 
submitted plans and shall comply with these rules.
1-8.3  An applicant shall  notify  the  department  upon  completion  of  the 
installation before the installation is placed into service.  The  department 
shall inspect the installation after receiving notification and shall certify 
the installation,  if  the  requirements  of  the  rules  are  met.   If  the 
inspection is not made within 2 working days, then the  applicant  may  place 
the installation into service, or if intended to be underground, mounded,  or 
partially underground, may cover  the  installation  from  sight,  and  shall 
notify the  department,  and  shall  submit  a  notarized  affidavit  to  the 
department attesting to the fact that  the  installation  complies  with  the 
installation application submitted and the applicable rules.
1-8.4  Upon the owner's  request,  all  plans  and  specifications  that  are 
submitted to the department for review shall be returned after the department 
has certified the installation or within 30 working days  after  notification 
to  the  department  of  the  completion  of  the  installation.   Plans  and 
specifications may be marked "Confidential-Do Not Copy" at the time they  are 
submitted.

  History: 2008 AACS.


R 29.7018  Installation application fees and annual certification.
  Rule 18. Sections 1-9 to 1-9.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-9 Installation application fees and annual certification.
1-9.1  Only an owner of an H2 container  system  for  which  an  installation 
application is required to be submitted under section  1-8  of  the  H2  code 
shall be required to pay fees as specified in section 5 of 1941 PA  207,  MCL 
29.5.
1-9.2  For the purpose of assessing fees  on  permanent  installations,  each 
26,000 scf storage capacity of H2 or increment thereof, shall be considered a 
container or any container filling location, as used in section 5 of 1941  PA 
207, MCL 29.5.

  History: 2008 AACS.


R 29.7019  Personnel.
  Rule 19. Sections 1-10 to 1-10.1 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
1-10 Personnel.
1-10.1 In the interest of safety, all persons involved in handling  H2  shall 
be trained in the proper handling and operating  procedures.   This  training 
shall be acceptable to the department.
Exception: This training is not required for a person dispensing  H2  into  a 
vehicle at an attended self-service facility.

  History: 2008 AACS.


                    Chapter 2 Design of gaseous hydrogen systems


R 29.7020  Containers.
  Rule 20.  Section 2-1.3 is reproduced from  NFPA  50A,  and  sections  2-1, 
2-1.1, 2-1.2, and 2-1.4 to 2-1.8.2 of   the   storage   and    handling    of 
gaseous  and Liquefied H2 code are added as follows:
2-1 Containers.
2-1.1 H2 containers shall comply with 1 of the following:
  (a)  Designed,   constructed,   and    tested    in    accordance      with 
appropriate requirements of  ASME  International,  "Boiler    and    Pressure 
Vessel  Code," Section VIII, "Rules for the construction of pressure vessels, 
"  adopted  by reference in section 8-1.
  (b) Designed, constructed, tested, and maintained  in    accordance    with 
Title 49, CFR.
  (c) Metal hydride storage systems shall be listed  for   the    application 
and designed in a manner that prevents the removal of  the  metal  hydride.
(d) When allowed by   the   department,     fully     over-wrapped     carbon 
composite containers designed to a  standard  acceptable  to  the  department 
based  on  the best interest of public health, safety, and the environment.
2-1.2 Permanently installed aboveground containers  shall  be  provided  with 
substantial  supports,  constructed  of  noncombustible  material   on   firm 
foundations of noncombustible material, and shall comply with  the  following 
subsections as applicable:
  (a)  Steel supports in excess of  18  inches   (45.72    centimeters)    in 
height, shall have a minimum 2-hour fire resistance rating, see figure 2-1.2.
Exception: Supports may be greater than  18  inches  (45.72  centimeters)  if 
owner demonstrates, to the satisfaction of the department, that the container 
will not be exposed to a 2-hour pool fire.
  (b)  If a permanently installed aboveground container is in an  area   that 
is subject to buoyant forces,  provision  shall  be  made  to   prevent   the 
container, either full or empty, from floating during a rise in water  level,
 including up to the established maximum flood stage.
  (c)  Horizontally installed containers shall have not more than  2   points 
of support longitudinally or other methods approved by the department   based 
on  the  best  interest  of  public  health,  safety,  and  welfare  and  the 
environment.
  (d)  Horizontally installed containers shall not be in    direct    contact 
with each other.
  (e)  Composite containers shall be protected from UV radiation as  required 
in the manufacturer's specifications.
  (f)   Aboveground  containers  shall  be  protected    by    painting    or 
other equivalent means where necessary to inhibit corrosion.
Exception: Composite containers shall not be painted without prior permission 
from the container manufacturer.
  (g) Welding or brazing for the  repair   or   alteration   of    an    ASME 
pressure vessel shall comply with the standard adopted in section 8-1.2.1.
  (h) Other welding or brazing shall be permitted only  on   saddle   plates, 
lugs, or brackets which are attached to the pressure vessel by  the  pressure 
vessel manufacturer.
  (i) The exchange or interchange of pressure vessel  appurtenances  intended 
for the same  purpose  shall  not  be  considered  a  repair  or   alteration 
and appurtenances must comply with these rules.


Figure 2-1.2 in PDF


2-1.3 Each portable container shall be legibly marked with the name  hydrogen 
in accordance with ANSI/CGA C-4, Method of Marking  Portable  Compressed  Gas 
Containers to Identify the Material Contained. Each manifold hydrogen  supply 
unit shall be legibly marked with the name hydrogen or a legend such as "This 
unit contains hydrogen." 
2-1.4 An owner or  operator   that   has    had    a 
container  subjected  to  heat  exposure  due  to  fire  shall   remove   the 
container   from   service,   unless   the   owner   or   operator   provides 
documentation  of  recertification  in  accordance with section 2-1.1, to the 
department substantiating container integrity.
2-1.5 Guard posts or other approved means shall  be  provided  to  protect  a 
container  system  subject  to  vehicular  damage.   When  guard  posts   are 
installed, all of the following design specifications shall be met:
  (a)  Guard posts shall be constructed of steel not  less  than   4   inches 
(10.16 centimeters) in diameter and shall be filled with concrete.
  (b)  Guard posts shall be spaced not more  than  4  feet  (1.2  meters)  on 
center.
  (c)  Guard posts shall be set not less than 4 feet (1.2  meters)  deep   in 
a concrete footing that is not  less  than  15  inches   (38.1   centimeters) 
in diameter.
  (d)  Guard posts shall be not less than 4 feet (1.2  meters)   in    height 
above grade.
  (e)  Other means as approved by the department based on the best  interests 
of public health, safety, and welfare and the environment.
2-1.6  Physical  protection.   Containers,  piping,  valves,  pressure-relief 
devices, regulating equipment, and other  appurtenances  shall  be  protected 
against physical damage and tampering.
2-1.7 Portable containers subject to shifting or upset  shall  be  secured.
Nesting may be used to secure portable containers.
2-1.8 Underground containers.  Underground  containers  for  the  storage  of 
gaseous H2 shall be in accordance with this subsection.
2-1.8.1 Construction.  Storage containers for gaseous H2  shall  be  designed 
and constructed in  accordance  with  Section  VIII  of  ASME  International, 
"Boiler and Pressure Vessel Code," adopted by reference in section  8-1,  and 
shall be vacuum-jacketed in accordance with section 2-1.10.1.1.
2-1.8.2 Corrosion Protection.  The underground container shall  be  protected 
by an engineered corrosion protection system designed by a corrosion expert.
If cathodic protection is  used  the  maintenance  schedule  shall  meet  the 
requirements of section 5-4.

  History: 2008 AACS.


R 29.7021  Pressure relief devices.
  Rule 21. Section 2-2.3 is reproduced from NFPA  50A,  and   sections   2-2, 
2-2.1, 2-2.2, and 2-2.4 to 2-2.7.1 of   the   storage   and    handling    of 
gaseous  and Liquefied H2 code are added as follows:
2-2 Pressure relief devices.
2-2.1 H2 containers shall be protected from credible  overpressure  scenarios 
by a relief device installed  in  accordance  with  the  ASME  International, 
"Boiler Pressure Vessel Code,"  section  VIII  division  1  sections  UG  125 
through 137,  adopted  by  reference  in  section  8-1.   When  all  credible 
overpressure sources are external to the container, the relief device(s) need 
not be installed directly on  the  container.   In  such  cases,  the  relief 
devices may be  installed  in  the  piping  between  the  container  and  the 
source(s) of overpressure and a block valve  may  be  installed  between  the 
relief device(s) and  container,  provided  the  source  of  overpressure  is 
blocked from the container.
2-2.1.1 Fully over-wrapped carbon composite containers shall be protected  by 
thermally activated pressure relief  devices  acceptable  to  the  department 
based on the best  interests  of  public  health,  safety,  welfare  and  the 
environment.
2-2.2 Pressure relief devices, when installed, shall be arranged to discharge 
upward and unobstructed to the open air in such a manner as  to  prevent  any 
impingement of escaping gas  upon  the  container,  adjacent  structures,  or 
personnel.  The vent  and  piping  system  from  relief  device(s)  shall  be 
designed and installed in accordance with CGA G-5.5.
2-2.3 Pressure relief devices or vent piping shall be designed or located  so 
that moisture cannot collect and freeze in a manner that would interfere with 
proper operation of the device.
2-2.4 Pressure relief valves for gaseous H2 service shall not be fitted  with 
manual relief (lifting devices).
2-2.5  Pressure  relief  valves  for  gaseous  H2  systems,   if   externally 
adjustable, shall be provided with a means  for  sealing  the  adjustment  to 
prevent tampering.
2-2.5.1 If at any time it is necessary to break such a seal, the valve  shall 
be removed from service until it has been reset and sealed in accordance with 
design, certification, and installation code specified in section 2-2.1.
2-2.6 Pressure relief valves shall be tested at least every 5 years.
Exception: Non-ASME relief valves used for blocked-in portions of  piping  as 
thermal relief valves will not be tested.
2-2.7 Excess flow control shall be provided for pressurized H2 piping systems 
above  15  psig  when  system  design  allows  their  application  to  add  a 
significant  measure  of  safety  for  break,  rupture,  or  open  valve  (to 
atmosphere) conditions.
2-2.7.1 The location of excess flow control  shall  be  as  specified  as  in 
either of the following situations:
  (a)  Where piping originates from a source located in a  room   or    area, 
the excess flow control shall be located within the same room or area.
  (b)  Where piping originates from a  bulk   source,   the    excess    flow 
control shall be as close to the bulk source as possible.
Exception: The above  requirements  shall  not  apply  to  piping  for  inlet 
connections designed to prevent backflow, piping pressure relief devices,  or 
systems containing 450 scf of H2 gas or less.

  History: 2008 AACS.


R 29.7022  Piping, tubing, and fittings.
  Rule 22. Sections 2-3.1 is  reproduced  from  NFPA  50A,    and    sections 
2-3.1.1, 2-3.1.2, and 2-3.2 to 2-3.13 of the  storage   and    handling    of 
gaseous  and Liquefied H2 code are added as follows:
2-3 Piping, tubing, and fittings.
2-3.1 Piping, tubing, and fittings shall be suitable for H2 service  and  for 
the pressures and temperatures involved. Cast-iron pipe  and  fittings  shall 
not be used.
2-3.1.1 A piping  system  shall  be  substantially  supported  and  protected 
against physical damage  and  excessive  stresses  arising  from  settlement, 
vibration, expansion, or contraction.  Supports for aboveground piping  shall 
be constructed of noncombustible material.
2-3.1.2 Aboveground piping systems  shall  be  protected  from  corrosion  in 
compliance with recognized standards.  Underground piping systems shall be in 
compliance with section 5-4.
2-3.2 Material specifications  and  thickness  requirements  for  piping  and 
tubing shall conform to ASME B31.3, "Process Piping," adopted by reference in 
section 8-1.
2-3.3 Brazing materials shall  have  a  melting  point  above  1,000  degrees 
Fahrenheit (538 degrees Celsius).  Flanged connection shall use a gasket that 
is suitable for  H2.   When  making  joints  in  piping  and  tubing,  thread 
sealants, when used, shall be suitable for H2 service and shall be applied to 
male pipe threads prior to assembly.
2-3.4 Aboveground piping systems shall  be  marked  in  accordance  with  the 
following:
  (a)  Marking shall include the name of the gas and direction of flow arrow.
  (b)  Marking  for  piping  systems  shall  be  provided  at  the  following 
locations:
  (i)  At each critical process control valve.
  (ii)  At wall, floor, or ceiling penetrations.
  (iii)  At each change in direction.
  (iv)  At a minimum  of  every  20   feet   (6.1   meters)    or    fraction 
thereof throughout the piping run.
2-3.5 Threaded or flanged connections shall not be used in areas  other  than 
outdoors.
2-3.6 Underground piping shall be installed on a bedding of at least 6 inches 
(15.24 centimeters) of well-compacted backfill material.
2-3.7 In areas subject to vehicle  traffic,  the  pipe  trench  shall  be  of 
sufficient depth to permit  a  cover  of  not  less  than  18  inches  (45.72 
centimeters) of well compacted backfill material and pavement.
Exception 1: In paved areas where a minimum of 8 inches  (20.32  centimeters) 
of asphalt paving is used, the depth of the backfill between the topmost tier 
of piping and the paving may be reduced to not  less  than  8  inches  (20.32 
centimeters).
Exception 2: In paved areas where a minimum of 6 inches  (15.24  centimeters) 
of reinforced concrete paving is used, the  depth  of  backfill  between  the 
topmost tier of the piping and the paving may be reduced to not less  than  4 
inches (10.16 centimeters).
2-3.8 In areas not subject to vehicle traffic, the pipe trench  shall  be  of 
sufficient depth to permit 6 inches (15.24 centimeters) each of  bedding  and 
cover of well-compacted backfill material.  A greater burial depth  shall  be 
provided when required by the manufacturer's instructions.
2-3.9 Piping within the same trench shall be separated by more than  3  times 
the diameter of the larger adjacent pipe.
2-3.10 Piping to equipment shall  be  provided  with  an  accessible,  manual 
shutoff valve.
2-3.11 Pipe, tubing, fittings, and other piping components shall  be  capable 
of withstanding a hydrostatic test of at least  3  times  the  rated  service 
pressure without structural failure as documented by the manufacturer.
2-3.12 All natural gas piping shall be installed in accordance with R 29.4601 
et seq.
2-3.13 All liquefied petroleum gas piping shall be  installed  in  accordance 
with R 29.4001 et seq.

  History: 2008 AACS.


R 29.7023  Equipment assembly.
  Rule 23. Sections 2-4 to 2-4.6  are  reproduced  from   NFPA    50A,    and 
sections 2-4.7 to 2-4.10 of the storage and handling of gaseous and Liquefied 
H2  code are added as follows:
2-4 Equipment assembly.
2-4.1 Valves, gauges, regulators, and other accessories shall be  recommended 
for H2 service by the manufacturer or the H2 supplier.
2-4.2 Installation of H2 systems shall be supervised  by  personnel  familiar 
with proper practices with reference to their construction and use.
2-4.3 Storage containers, piping, valves,  regulating  equipment,  and  other 
accessories shall be accessible  and  shall  be  protected  against  physical 
damage and against tampering by the general public.
2-4.4 Cabinets or housings containing H2 control or operating equipment shall 
be ventilated to minimize accumulation of H2.
2-4.5 Each mobile H2 supply unit used as  part  of  an  H2  system  shall  be 
secured to prevent movement.
2-4.6 Mobile H2 supply units shall  be  electrically  bonded  to  the  system 
before discharging H2.
2-4.7 Emergency shutoff valves shall be approved and shall incorporate all of 
the following means of closing:
  (a) Automatic  shutoff   through   thermal   (fire)    actuation.     Where 
fusible elements are used, they shall have a melting point not exceeding  250 
degrees Fahrenheit (121 degrees Celsius).
  (b) Manual shutoff from a remote location.
  (c) Manual shutoff at the installed location.
2-4.8 The fill line, when it is independent of the withdraw line on a storage 
container, shall be equipped with a backflow check valve located as close  as 
practical to the container to prevent discharge of H2 from the  container  in 
case of the rupture of the line, hose, or fittings.
2-4.9 Where excess-flow check valves are used,  the  closing  flow  shall  be 
greater than the maximum system design flow  rate  and  less  than  the  flow 
rating of the piping system that results from a complete line failure between 
the excess-flow check valve and the equipment downstream of  the  excess-flow 
check valve.
2-4.10 Gas piping from  an  outdoor  compressor  or  storage  system  into  a 
building shall be provided with shutoff valves located outside the building.
The shutoff valves shall be readily accessible and as close as  practical  to 
the building.  Each valve shall be permanently identified.

  History: 2008 AACS.


R 29.7024  Marking.
  Rule 24. Sections 2-5 to 2-5.4 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
2-5 Marking. Gaseous H2 containers and systems shall be marked in  accordance 
with this section.
2-5.1 Identification of contents. Each container shall be marked as follows:
"GASEOUS HYDROGEN - FLAMMABLE GAS" in letters that are not less than 3 inches 
(76 millimeters) in height.
2-5.2 Container specification.  Stationary containers shall  be  marked  with 
the manufacturing specification and maximum allowable working pressure  on  a 
permanent nameplate in accordance with the standard to  which  the  container 
was manufactured.
2-5.3 Portable containers.  Portable containers shall be marked in accordance 
with CGA C-7, "Guide to the Preparation of Precautionary Labeling and Marking 
of Compressed Gas Containers," adopted by reference in section 8-1.
2-5.4 Stationary  containers.   Stationary  containers  shall  be  marked  in 
accordance with NFPA 704, "Standard Systems for  the  Identification  of  the 
Hazards of Materials for Emergency Response," adopted by reference in section 
8-1.

  History: 2008 AACS.


R 29.7025  Testing.
  Rule 25. Section 2-6 is reproduced from NFPA 50A, and section   2-6.1    of 
the storage and handling of gaseous and Liquefied H2 code is added as follows:
2-6 Testing. After installation, all piping, tubing, and  fittings  shall  be 
tested and proved H2 gas-tight at maximum operating pressure.
2-6.1 Containers, if out of service in excess of 1 year, shall  be  inspected 
and tested as outlined in section 2-6.  The pressure relief devices shall  be 
checked to determine if they are operable and properly set.

  History: 2008 AACS.


R 29.7026  Approval.
  Rule 26. Sections 2-7 and 2-7.1 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
2-7 Approval.
2-7.1 Systems  and  all  system  components  shall  be  listed  or  approved, 
including, but not limited to all of the following:
  (a) Container.
  (b) Pressure relief device, including a pressure relief valve.
  (c) Pressure gauge.
  (d) Pressure regulator.
  (e) Valve.
  (f) Hose and hose connection.
  (g) Vehicle fueling connection.
  (h) Electrical equipment related to the H2 system.
  (i) Dispenser.
  (j) Emergency shutoff valves.
  (k) Metal hydride storage.
  (l)  Gas detection equipment and alarms.
  (m) H2 generators.
  (n)  Pumps or compressor.
  (o)  Stationary engine fuel system.

  History: 2008 AACS.


R 29.7027  Pressure gauges.
  Rule 27. Section 2-8 of the storage and handling of gaseous  and  Liquefied 
H2 code is added as follows:
2-8 Pressure gauges.  A pressure gauge, if  provided,  shall  be  capable  of 
reading at least 1.2 times the system MAWP.

  History: 2008 AACS.


R 29.7028  Pressure regulators.
  Rule 28. Sections 2-9 to 2-9.3 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
2-9 Pressure regulators.
2-9.1 A pressure regulator inlet and each chamber shall be designed  for  its 
service pressure with a safety factor of at least 3.
2-9.2 Pressure chambers shall provide for overpressure relief, if required.
2-9.3 Regulators shall be designed, installed, or  protected  so  that  their 
operation is not affected by freezing rain, sleet, snow, ice,  mud,  insects, 
or debris. Regulator protection may be integral with the regulator.

  History: 2008 AACS.


R 29.7029  Valves.
  Rule 29. Sections 2-10 to 2-10.2 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
2-10 Valves.
2-10.1 Shutoff valves shall have a rated service pressure not less  than  the 
rated service  pressure  of  the  entire  system  and  shall  be  capable  of 
withstanding a hydrostatic test  of  at  least  3  times  the  rated  service 
pressure without rupture.
2-10.1.1 Leakage shall not occur when tested at least  1.1  times  the  rated 
service pressure, using an inert gas compatible with industry practices.
2-10.2 Valves of a design that allows the valve stem to  be  removed  without 
removal of the complete valve bonnet or without disassembly of the valve body 
shall not be used.

  History: 2008 AACS.


R 29.7030  Hose and hose connections.
  Rule 30. Sections 2-11 to 2-11.6 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
2-11 Hose and hose connections.
2-11.1 Hose shall  be  constructed  of  or  lined  with  materials  that  are 
resistant to corrosion and compatible with H2.
2-11.2  Hose,  metallic  hose,  flexible  metal  hose,  tubing,   and   their 
connections shall be designed for the most severe pressures and  temperatures 
expected under normal operating conditions with a burst pressure of at  least 
3 times the service pressure.
2-11.3 Prior to use, hose assemblies shall be tested by the  manufacturer  or 
its designated representative at a pressure at least 1.1  times  the  service 
pressure.
2-11.4 Hose and metallic hose shall be distinctly marked by the  manufacturer 
either by the manufacturer's permanently attached tag or by distinct markings 
indicating  the  manufacturer's  name  or   trademark,   applicable   service 
identifier and design pressure.
2-11.5 The use of hose in an  installation  shall  be  limited  to  only  the 
following applications:
  (a) Vehicle fueling hose.
  (b) Inlet connection to compression equipment.
  (c) Section of metallic hose  not  exceeding  36  inches  in   length    in 
the pipeline to provide flexibility where necessary.
2-11.6 Each section shall be  so  installed  that  it  is  protected  against 
mechanical damage and is readily visible for inspection.

  History: 2008 AACS.


R 29.7031  Vehicle fueling connection.
  Rule 31. Sections 2-12 to 2-12.2 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
2-12 Vehicle fueling connection.
2-12.1 Fueling receptacles and nozzles for gaseous H2 service shall be listed 
or approved in accordance with a standard acceptable to  the  department  and 
based on the best interest of public health,  safety,  and  welfare  and  the 
environment.
2-12.2 The use of adapters shall be prohibited.

  History: 2008 AACS.


R 29.7032  Temporary installations.
  Rule 32. Sections 2-13 and 2-13.1 of the storage and handling  of   gaseous 
and Liquefied H2 code are added as follows:
2-13 Temporary installations.
2-13.1 ASME or  U.S.  DOT  containers  that  are  used  as  portable  storage 
containers, (see definition  of  portable  container  in  section  1-5),  for 
temporary, less than 6 months at any given location, stationary service shall 
comply with the following:
  (a) If mounted on legs or supports, then such supports shall be  of   steel 
and either shall be welded to the container by the manufacturer at  the  time
 of fabrication or shall be attached to lugs that have  been  so  welded   to 
the container.  The legs or supports or the lugs for the attachment of  these 
legs or supports shall be secured to the container  in  accordance  with  the 
code  or rule under which the container was designed and built  to  withstand 
loading in any  direction  equal  to  twice  the  weight   of    the    empty 
container  and attachments.
  (b) If the container is mounted on a trailer or semi-trailer  running  gear 
so that the unit can be moved by  a  conventional   over-the-road    tractor, 
then attachment to the vehicle, or attachments to  the  container   to   make 
it  a vehicle, shall comply with the appropriate U.S. DOT  requirements   for 
cargo tank service.  The unit also shall comply  with  applicable  state  and 
U.S.  DOT motor carrier regulations and shall be approved by the department.

  History: 2008 AACS.


                 Chapter 3 Location of gaseous hydrogen systems


R 29.7033  General requirements.
  Rule 33. Sections 3-1.1, and  3-1.4  are  reproduced  from  NFPA  50A,  and 
sections 3-1.2, 3-1.3, and 3-1.5 to 3-1.10 of the  storage  and  handling  of 
gaseous  and Liquefied H2 code are added as follows:
3-1 General requirements.
3-1.1 The system shall be located  so  that  it  is  accessible  to  delivery 
equipment and to authorized personnel. Roadways or other means of access  for 
emergency equipment, such as fire department apparatus, shall be provided.
3-1.2 Above ground systems shall be located either at grade or above grade.
3-1.3 Aboveground systems shall not be located beneath or  where  exposed  to 
failure of the following:
  (a)  Electric power lines as follows:
  (i) Not less than 50 feet (15.24 meters)  horizontally  from  the  vertical 
plane below the nearest overhead wire of an electric trolley, train,  or  bus 
line.
  (ii) Not less than 5 feet (1.52 meters) horizontally  from   the   vertical 
plane below the nearest overhead electrical wire.
  (b)  Piping containing all classes of flammable or  combustible    liquids, 
see definition in Section 1-5.
  (c)  Piping containing oxidizing materials.
3-1.4 Systems within 50 feet (15.24 meters) of  aboveground  storage  of  all 
classes of flammable and combustible  liquids  shall  be  located  on  ground 
higher than such storage, except where dikes, diversion  curbs,  grading,  or 
separating solid walls are used to  prevent  accumulation  of  these  liquids 
under the system.
3-1.5 Underground systems shall be located underground, mounded, or partially 
buried and outside of any buildings.  Buildings shall not be constructed over 
any underground, mounded, or partially buried container.  Sides  of  adjacent 
containers shall be separated by not  less  than  3  feet  (1  meter)  unless 
approved by the department.
  (a) Excavation for underground, mounded,  or  partially  buried  containers 
shall be made with due care to  avoid  damage  to  an   existing    structure 
or  its foundation.  Containers shall not be  installed  where   loads   from 
adjacent structures may be transmitted to  the  container.   A  structure  or 
foundation of a structure on the same property  shall  not  be   erected   or 
constructed  within 10 feet (3.1 meters) of any  point  on   the    container 
surface,  unless  the footings extend to the bottom of  the   container.    A 
container  shall  not  be installed less than 10 feet  (3.1   meters)    from 
the  nearest  wall  of  any basement, pit, or property line.
3-1.6 All  underground  containers  shall  be  set  on  firm  foundation  and 
surrounded with 6 inches (15.24 centimeters) minimum  of  noncorrosive  inert 
material such as clean sand or pea gravel.
3-1.7 Underground or mounded containers shall be covered with not less than 2 
feet (0.6 meter) of earth or with not less than 1 foot (30.48 centimeters) of 
earth on top of which shall be placed a reinforced  concrete  slab  not  less 
than 4 inches (10.16 centimeters) thick.  If  containers  are  likely  to  be 
subjected to traffic, they shall be protected against  damage  from  vehicles 
passing over them by at least 3 feet (1 meter) of earth cover plus  6  inches 
(15.24 centimeters) of reinforced concrete.  When reinforced concrete  paving 
is used as part of the protection, it shall extend at  least  1  foot  (30.48 
centimeters)  horizontally  beyond  the  outline  of  the  container  in  all 
directions 
3-1.8 Containers installed in an area subject  to  flooding,  high 
water  table, or other buoyant forces shall be safeguarded from movement   by 
anchoring  or other means acceptable to the department  based  on  the   best 
interests  of public health, safety, and welfare and the environment.
3-1.9 Aboveground gaseous H2 systems shall be fenced and  posted  to  prevent 
entrance by unauthorized personnel.
Exception:  Gaseous H2 dispensers may be located outside the fence.
3-1.10 Underground  installations  shall  be  deemed  to  provide  engineered 
protection from overhead power lines.

  History: 2008 AACS.


R 29.7034  Specific requirements.
  Rule 34. Sections 3-2.1, 3-2.4, 3-2.5, and table 3-2.1   are   reproduced   
from NFPA 50A, and table 3-2.2, sections 3-2.2, 3-2.3 and 3-2.6 to  3-2.9  of 
 the storage and handling of gaseous and  Liquefied  H2  code  are  added  as 
follows:
3-2 Specific requirements.
3-2.1 The location of a system, as determined by the maximum total  contained 
volume of H2, shall be in the order  of  preference  as  indicated  by  Roman 
numerals in table 3 2.1.


  

    

      

      
Nature of Location
      

      
Size   of   Hydrogen 
System
    
    

      

      
Less than 3500 scf  (99 
m3)
      

      
3500 scf to 15,000  scf 
(99 
      m3 to 425 m3)
      

      
In    Excess    of 
15,000 scf 
      (425 m 3)
    
    

      

      
Outdoors 
      

      
I
      

      
I
      

      
I
    
    

      

      
In    a    separate 
building 
      

      
II
      

      
II
      

      
II
    
    

      

      
In    a    special 
room 
      

      
III
      

      
III
      

      
Not permitted
    
    

      

      
Inside buildings not in 
a 
      special room or exposed to other occupancies 
      

      
IV
      

      
Not permitted
      

      
Not permitted
    
  


3-2.2 The minimum distance in feet from an H2 system  of  indicated  capacity 
located either outdoors, in separate buildings, or in special  rooms  to  any 
specified outdoor exposure shall be in  accordance  with  table  3-2.2.   The 
distances in numbers 1, 3 to 10, and 14 inclusive in table  3-2.2  shall  not 
apply where protective structures having a minimum fire resistance rating  of 
2 hours are located between the system and the exposure. 
(a) An aboveground H2 storage container system shall be erected per  table  3 
2.2, but not less than 50 feet (22.9 meters), from any of the following:
A school.
A church.
A hospital.
A theater.
Assembly occupancy for 50 or more persons.
Exception: The restrictions  in  section  3-2.2(a)  shall  not  apply  to  an 
aboveground H2 system used exclusively for stationary power generation.

	Table 3-2.2
Minimum Distance from Outdoor Gaseous Hydrogen Systems to Exposures



  

    

    

    
                                                                  
Total 
    Gaseous Hydrogen Storage
  
  

    

    
Type of Outdoor 
    
Exposure                                                     

    

    
Less than 
    
3500  scf   (99 
m3)
    
 
    
Feet 
    
(meter)                                 

    

    
3500  scf  to  
15,000 scf
    
    
(99 m3 to 
    425 m3)                                              Feet 
(meter)                                       
   
    

    
In excess  of  15,000 
scf  
    (425 m3)
    
Feet  (meter)

  
  

    

    
1.   
Building or 
    structure

        (a)   Wall(s)  adjacent  to  system   constructed   of 
noncombustible or 
    limited-combustible materials
    

      (1)  Sprinklered 
    building or structure or unsprinklered building or structure having 
    noncombustible contents
    

    


    

 
    
0a 
(0)
    

    


    

 
    
5a 
(1.5)
    

    


    

 
    
5a 
(1.5)
  
  

    

    

      (2)  Unsprinklered 
    building or structure with combustible contents

    Adjacent wall(s) with fire resistance rating less than 2 hoursb

    

    
 
    
0c 
(0)
    

    
 
    
10 (3.1)
    

    
 
    
25d 
(7.6)
  
  

    

    
Adjacent wall(s) with 
    fire resistance rating of 2 hours or greaterb
    

    
0 (0)
    

    
5 (1.5)
    

    
5 (1.5)
  
  

    

    
   
(b)  Wall(s) adjacent 
    to   system    constructed    of    other    than    noncombustible    or 
limited‑combustible 
    materials
    

    


    10 (3.1)
    

    


    25 (7.6)
    

    


    50d (15.2)
  
  

    

    
2.    Wall 
openings

       (a)  Not above any part of a system
    

    


    10 (3.1)
    

    


    10 (3.1)
    

    


    10 (3.1)
  
  

    

    
   
(b)  Above any part 
    of a system
    

    
25 (7.6)
    

    
25 (7.6)
    

    
25 (7.6)
  
  

    

    
3.    All 
classes of 
    flammable and combustible liquids above ground

       (a)  0-1000 gal (3785L)
    

    


    10 (3.1)
    

    


    25 (7.6)
    

    


    25 (7.6)
  
  

    

    
   
(b)  In excess of 
    1000 gal (3785L)
    

    
25 (7.6)
    

    
50 (15.2)
    

    
50 (15.2)
  
  

    

    
4.    All 
classes of 
    flammable and combustible liquids below ground  

    0-100 gal (3785L)e

       (a)  Tank
    

    


    

    10 (3.1)
    

    


    

    10 (3.1)
    

    


    

    10 (3.1)
  
  

    

    
   
(b)  Vent or fill 
    opening of tank
    

    
25 (7.6)
    

    
25 (7.6)
    

    
25 (7.6)
  
  

    

    
5.    All 
classes of 
    flammable and combustible liquids below ground – in excess of 1000 gal 
    (3785L)e

       (a)  Tank
    

    


    

    20 (6.1)
    

    


    

    20 (6.1)
    

    


    

    20 (6.1)
  
  

    

    
   
(b)  Vent of fill 
    opening of tank
    

    
25 (7.6)
    

    
25 (7.6)
    

    
25 (7.6)
  
  

    

    
6.   
Flammable gas 
    storage  (other  than  H2),  either  high  pressure   or   low 
pressure

       (a)  0-15,000 scf  (255  me)  capacity

    

    


    

    10 (3.1)
    

    


    

    25 (7.6)
    

    


    

    25 (7.6)
  
  

    

    
   
(b)  In excess of 
    15,000 scf (255 me) capacity
    

    
25 (7.6)
    

    
50 (15.2)
    

    
50 (15.2)
  
  

    

    
7.   Oxygen 
storage

       (a)  20,000 scf (566 me) or less
    

    
Refer to NFPA 51, 
    Standard for the Design and Installation of Oxygen-Fuel Gas Systems for 
    Welding, Cutting, and Allied Processes
  
  

    

    
   
(b)  More than 20,000 
    scf (566 me) 
    

    
Refer to NFPA 55, 
    Standard for the Storage, Use, and Handling of Compressed Gases and 
    Cryogenic Fluids in Portable and Stationary  Containers,  Cylinders,  and 
Tanks
  
  

    

    
8.   
Fast-burning solids 
    such as ordinary lumber, excelsior, or paper
    

    
50 (15.2)
    

    
50 (15.2)
    

    
50 (15.2)
  
  

    

    
9.   
Slow-burning solids 
    such as heavy timber or coal
    

    
25 (7.6)
    

    
25 (7.6)
    

    
25 (7.6)
  
  

    

    
10.  Open flames 
and 
    welding
    

    
25 (7.6)
    

    
25 (7.6)
    

    
25 (7.6)
  
  

    

    
11.     Air 
compressor 
    intakes or inlets to ventilating or air-conditioning equipment
    

    
50 (15.2)
    

    
50 (15.2)
    

    
50 (15.2)
  
  

    

    
12.   Places  of 
public 
    assembly less than 50 people
    

    
25 (7.6)
    

    
50 (15.2)
    

    
50 (15.2)
  
  

    

    
13    Public 
sidewalks and 
    parked vehicles
    

    
15 (4.6)
    

    
15 (4.6)
    

    
15 (4.6)
  
  

    

    
14   Line   of 
adjoining 
    property that can be built upon
    

    
5 (1.5)
    

    
5 (1.5)
    

    
5 (1.5)
  
  

    

    
15.  
    Flammable/Combustible liquid dispenser
    

    
10 (3.1)

    

    
10 (3.1)

    

    
10 (3.1)

  
  

    

    
16.  Public Way, 
    driveway
    

    
15 (4.6)

    

    
15 (4.6)

    

    
15 (4.6)

  
  

    

    
17.  
Railroad
    

    
50  (15.2)

    

    
50  (15.2)

    

    
50  (15.2)

  
  

    

    
a
Portions 
    of wall less than 10 ft (3m) (measured horizontally) from any part of a 
    system shall have a fire resistance rating of at least ½ hour.

    bExclusive of  windows  and  doors  (see  number  2  of  Table 
3-2.2).

    cPortions  of  walls  less   than   10   ft   (3m)   (measured 
horizontally) 
    from any part of a system shall have a fire resistance rating of at least 
1 
    hour.

    dBut not less than 1/2 the height of adjacent wall of building 
or 
    structure.

    eDistances can be reduced to 15 ft (4.5m) for Class IIIB 
    combustible liquids.
  



3-2.2.1 Loose or piled combustible material and  weeds  and  long  dry  grass 
shall not be within 10 feet (3.1 meters) of any system.
 Roof top storage.
Construction of the building/roof that carries the load of the  storage  tank 
must carry a minimum 1-hour fire rating.
System must be securely mounted to roof.
System must be located to allow for inspection of the  system  acceptable  to 
the department based on the best  interest  of  public  health,  safety,  and 
welfare and the environment.
3-2.3 Unloading connections on delivery equipment  shall  not  be  positioned 
closer to any of the exposures cited in table 3-2.2 than the distances  given 
for the storage system.
  (a) H2  transfer  between  cargo   transport   vehicle   and   stationary   
container systems (single or multiple  containers  utilizing  a  common  or   
manifolded transfer line), shall comply with all of the following:
  (i) Owners and operators shall ensure that fixed piping is used   between   
the container and master shutoff and  check   valves.    The   piping   and   
manifolds shall be secured to the container frame.  Flexible hoses are  only  
permitted between the check valve and the cargo vehicle unloading connection.
  (ii) Emergency shutoff valves  required  in   this   section   shall   be   
tested annually for proper operation.  The results  of  the  tests  shall  be 
documented.
  (iii)All installations shall have at  least  1  clearly  identified   and   
easily accessible manually operated remote emergency shutoff device.   Within 
1  year after the effective date of these rules, existing installations shall 
have at least 1 clearly identified and easily  accessible  manually  operated 
 remote emergency shutoff device.  The  emergency  shutoff  device  shall  be 
located  not less than 20 feet (6.1 meters) nor more than  100  feet  (30.5   
meters)  in  the path of egress from the emergency shutoff  valve  and  not   
less  than  20  feet (6.1 meters) from the container system.
  (iv)During transfer of H2  to  and  from  cargo  vehicles,  the  hand  or   
emergency brake of the vehicle shall be set, and chock blocks shall  be  used 
to  prevent rolling of the vehicle.
  (v)  Transfer   systems   shall   be   capable   of   depressurizing   to   
facilitate disconnection.  Bleed connections shall lead to a  safe  point  of 
discharge.
  (vi) Cargo vehicle shall be equipped with air-brake interlock in  front  of 
the unloading connection to protect against drive-away.
  (b) The delivery vehicle shall be located so  that  all  parts   of   the   
vehicle are on the premises when delivery is made.   Check  valves  shall  be 
located  as close to the container as practical.
  (i) Sources of ignition shall not be permitted in  the   unloading   area   
while transfer is in progress.
3-2.4 H2 systems of  less  than  3500  scf  (99  m3),  where  located  inside 
buildings and exposed to other occupancies, shall be situated in the building 
so that the system will be as follows:
  (a) In an adequately ventilated area as in 4-2.2.
  (b) 20  feet  (6.1  meters)   from   all   classes   of   flammable   and   
combustible  liquids,   oxidizing   gases,   and    readily    combustible    
materials,  such   as excelsior and paper.
  (c) 25 feet (7.6 meters) from open flames, ordinary electrical equipment,   
or other sources of ignition .
  (d)  50  feet  (15.24  meters)  from   intakes   of    ventilation    or    
air-conditioning equipment and air compressors.
  (e) 50 feet (15.24 meters) from other flammable gas storage.
  (f) Protected against damage or injury  due   to   falling   objects   or   
working activity in the area.
More than one system of 3500 scf (99 cubic meters) or less shall be permitted 
to be installed in the same room, provided the systems are  separated  by  at 
least 50 feet (15.24 meters) or where a masonry structure  having  a  minimum 
fire resistance rating of 2 hours is located between the systems.  Each  such 
system shall meet all of the requirements of this section.
Exception: The separation distance between multiple systems of 3500  scf  (99 
cubic meters) or less shall be permitted  to  be  reduced  to  25  feet  (7.6 
meters) in buildings where the occupancy between storage  areas  is  free  of 
combustible materials and protected with  a  sprinkler  system  designed  for 
Ordinary  Hazard,  Group  1  occupancies  or  Light  Hazard  occupancies   in 
accordance with NFPA 13, Standard for the Installation of Sprinkler Systems.
3-2.6 An owner and operator shall ensure that a container  system,  which  is 
underground, mounded, or partially underground, is protected  from  corrosion 
by 1 of the following:
  (a) The approved container  system  is  cathodically  protected  by   all   
the following requirements:
  (i) The  approved  container   system   is   coated   with   a   suitable   
dielectric material approved by the department.
  (ii) Factory-installed or field installed  cathodic  protection   systems   
are designed by a corrosion  expert  or  in  accordance   with   the   NACE   
recommended practice RP0285 entitled  "Corrosion  Control  of   Underground   
Storage  Tank Systems by Cathodic Protection," or impressed  current  systems 
are designed to allow a determination  of  current  operating   status   as   
required  in  section 5.4-1 of the H2 code.
  (iii)  Cathodic  protection  systems  are  operated  and  maintained   in   
accordance with the provisions of section 5.4-1 of the H2 code.
  (b)   The   container   is   made   of    nonmetallic    construction    or 
corrosion-resistant, such as fiberglass or a composite.
  (c) Or other means acceptable  to  the  department  and  based   on   the   
best interest of public health, safety, and welfare and the environment.
3-2.7 Out-of-service aboveground containers.
Containers that are no longer in service for a period of 12 months  shall  be 
closed.  To close the aboveground container,  the  owner  or  operator  shall 
empty the container, purge it with an inert  gas  and  safeguard  it  against 
tampering.  Piping that is removed from service shall be purged with nitrogen 
and capped or removed.
3-2.7.2 Each container that is to be reused at the original location or a new 
location shall be purged with an inert gas and be in compliance with all  the 
requirements  for  the  installation  of  a  new  container,  and  shall   be 
recertified by the manufacturer or authorized representative, and  tested  in 
accordance with the container's design specifications or be  pressure  tested 
with an inert gas or H2 at 1.1 times the MAWP for not less than 10 minutes.
Piping that is to be reused shall comply with all the  requirements  for  the 
installation of new piping and shall be tested  in  compliance  with  section 
3-2.9 of this code prior to being brought back into service.
3-2.8 Out-of-service underground, mounded, and partially buried containers.
3-2.8.1 Containers that are no longer used to store H2 and are  not  intended 
to be brought back into service shall be permanently closed.  To  permanently 
close the container, the container shall be emptied and purged with an  inert 
gas to render the container free of H2,  and  then  the  container  shall  be 
removed from the ground.  When  a  structure  above  or  near  the  container 
prevents removal, the container shall be emptied and purged with an inert gas 
to render the container free of H2, then the container shall be  filled  with 
an inert solid material.  Piping that is  permanently  removed  from  service 
shall be purged with an inert gas and capped or removed.
3-2.8.2  Containers may be rendered temporarily out-of-service only  when  it 
is intended they be brought back into service at a later date. To temporarily 
close a container, all of the following requirements shall be met:
  (a) The container shall be emptied and purged with an inert gas.
  (b) Corrosion protection for the container and  all  underground   piping   
shall be maintained in compliance with section 5-4.1 of this code.
  (c) The vent line shall remain functional.
  (d) The container shall be secured against tampering.
  (e) Piping that is temporarily removed from service shall be purged  with   
an inert gas and capped.
3-2.8.2.1 Each container that is temporarily out of service for greater  than 
12 months shall be pressure tested with an inert gas at 1.1  times  the  MAWP 
for not  less  than  10  minutes  prior  to  being  brought  into  service.
Temporarily out of service piping shall be tested in compliance with  section 
3-2.9 of this code prior to being brought back into service.
3-2.9 Testing.  After installation, prior to being placed into  service,  all 
container connections and all field-erected piping, tubing,  hose,  and  hose 
assemblies shall be tested and proved H2 gas-tight for  the  rated  pressure, 
volume, and temperature of the gas  transported  by  an  approved  method  as 
outlined in ASME B31.3, "Process Piping,"  adopted by  reference  in  section 
8-1, or the following:
  (a) Perform a pressure test at 1.1 times MAWP, a minimum of 10 minutes.
  (b) During pressure test,  check  for  pressure  decay.   If  leakage  is   
detected, use leak detection fluid to find local leaks.
Energize the piping with H2 at the MOP, and check  for  local  leaks  with  a 
"sonic tester," "sniffer," or method acceptable to the  department  based  on 
the best interests of public health, safety, welfare and the environment.
If the test "fails" the requirements in subsections (a), (b), or (c) of  this 
section, the  system  must  be  purged  with  an  inert  gas,  repaired,  and 
subsections (a), (b), and (c) of this section shall  be  repeated  until  the 
test  "passes."

  History: 2008 AACS.


R 29.7035  Vaults for aboveground containers.
  Rule 35. Sections 3-3 to 3-3.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
3-3 Vaults for aboveground containers.  Vaults may be installed  aboveground, 
underground or partially buried.
3-3.1 General. Aboveground containers may be installed in  vaults  that  meet 
the requirements of section 3-3.  Except as modified  by  the  provisions  of 
section 3-3, vaults shall meet all other applicable provisions of these rules.
3-3.2 Vault  design  and  construction.   Vaults  shall   be   designed   and 
constructed to meet the following requirements:
  (a) The walls and  floor  of  the   vault   shall   be    constructed    of 
reinforced concrete at least 6 inches (15.24 centimeters) thick.
  (b)  The  top  of  an  aboveground  vault  shall   be    constructed     of 
noncombustible material and shall be designed to be weaker than the walls  of 
the  vault  to ensure that,  in  the  event  of  any  explosion,  the  thrust 
occurring  inside  the vault is directed upward before  destructive  internal 
pressure develops within the vault.  The top of an  at-grade  or  below-grade 
vault shall be designed  to relieve or contain the  force  of  any  explosion 
occurring inside  the  vault.
The walls of a vault, which are partially below-grade, shall extend not  less 
than 4 feet (1.2 meters) abovegrade.
  (c) The top and  floor  of  a  below-grade  vault   and    the    container 
foundation shall be  designed  to  withstand  all  anticipated  loading  from
 vehicular traffic, where applicable.
  (d) The walls and floor  of  a  below-grade  vault  shall  be  designed  to 
withstand anticipated soil and  hydrostatic  loading.   The  vault  shall  be 
liquid tight.
  (e) Adjacent vault may share a common wall.
  (f) The vault enclosure shall not have openings except   those    necessary 
for access to, inspection of, and  filling,  emptying,  and  venting  of  the 
container.
  (g) When required, the  vault  shall  be  designed   to   be    wind    and 
earthquake resistant, in accordance with good engineering practice.
  (h) The vault shall be provided with an  open  and  continuous   vent    to 
provide ventilation  to  dilute,  disperse,  and  remove  any  vapors.   This 
continuous vent line shall terminate 12 feet (3.7 meters) abovegrade.
  (i) Each vault shall be provided with a means  for  personal  entry,  which 
shall only be at the top of the vault to allow for the   visual    inspection 
of  the container and piping surfaces.  At each entry  point,    a    warning 
sign  that indicates the need for procedures for safe entry into  a  confined 
space   shall  be  posted.   Each  entry  point  shall  be  secured   against 
unauthorized entry  and vandalism.
  (j) The vault shall be provided with  an  approved  means  to    admit    a 
fire suppression agent.
  (k) The loading and unloading transfer  connection  for  abovegrade  vaults 
shall terminate outside the vault.
  (l) Provisions shall be made for   the   normal   operation    of    valves 
without entering the vault.
  (m) A vault shall be  located  not  less  than  15  feet    (4.6    meters) 
from buildings and property lines.
  (n) Container selection and arrangement.   Containers  shall   be    listed 
for aboveground use.  Each container or manifolded system, shall be  in   its 
own vault and shall  be  completely  enclosed  by  the  vault,  and  securely 
fastened to the  floor  of  the  vault.   Sufficient  clearance  between  the 
container  and  the vault shall be provided to allow  for  visual  inspection 
and maintenance of all the vault  surfaces  as  well  as  the  tank  and  its 
appurtenances.
  (o) The vault shall be  provided  with   a   continuous   H2    gas    leak 
detection device with an audible alarm set at 25% of the LEL and will  render 
the system inoperable.  The H2  leak  detection   device    shall    function 
during  system maintenance operations.

  History: 2008 AACS.

R 29.7036  Location of dispensing operations and equipment.
  Rule 36. Sections 3-4 to 3-4.5 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
3-4 Location of dispensing operations and equipment.
3-4.1 Dispensing equipment located outdoors shall be in accordance  with  the 
following:
  (a) Dispensing  equipment  shall  be  allowed  under   weather   protection 
in accordance with the requirements of section 4-5 and  constructed   in    a 
manner that prevents the accumulation of H2 gas.
3-4.2 Gaseous H2 compression and storage equipment located on  top  of  motor 
fuel-dispensing facility canopies shall be in accordance with the following:
  (a)  Canopies shall be constructed in accordance with   the    requirements 
for weather protection found in section 2209.3.2.6 of the International  Fire 
Code.
  (b)  Fuel-dispensing areas under canopies shall be   equipped    throughout 
with an approved automatic sprinkler system.    Operation   of    the    fire 
sprinkler system shall activate the emergency functions of the following:
  (i) Operation of  the   fire   sprinkler   system   shall    activate    an 
automatic emergency discharge  system,  which  will  discharge  the  H2   gas 
from  the equipment on the canopy top through the vent pipe system.
  (ii) Operation of  the  fire  sprinkler   system   shall    activate    the 
emergency shutdown control in section 7-6.
  (iii) Approved signage having a minimum of  3-inch    (7.62    centimeters) 
block letters shall be affixed on all sides on the  exterior  of  the  canopy 
structure stating either CANOPY TOP HYDROGEN  STORAGE  or  using  NFPA   704, 
"Standard System for the Identification of Fire Hazards of  Materials,"  1996
 edition, adopted by reference in section 8-1.1.
  (iv) System must be in compliance with section 3-2.2.2.
3-4.3 Dispensing equipment located outdoors shall be aboveground,  shall  not 
be beneath electric power lines or where exposed by their failure, and  shall 
be a minimum of 10 feet (3.1 meters) from the nearest important  building  or 
property line or 20 feet (6.1 meters) from any activity that involves a fixed 
source of ignition.
3-4.4 Dispensing equipment shall be located so that all parts of the  vehicle 
being served are on the premises of the motor fuel dispensing facility.
3-4.5 Dispensing equipment shall be protected  against  collision  damage  by 
means acceptable to the department.  Dispensing equipment shall  be  securely 
bolted in place.  Dispensing equipment shall be installed in accordance  with 
manufacturer's instructions.

  History: 2008 AACS.


R 29.7037  Installation of emergency shutdown equipment.
  Rule 37. Sections 3-5 to 3-5.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
3-5 Installation of emergency shutdown equipment.
3-5.1 Breakaway protection shall be provided in a manner such that, if a pull 
away event occurs, H2 gas will cease to flow at any separation.
3-5.2 A breakaway device shall be installed at every dispensing point.   Such 
a device shall be arranged to separate by a force not greater than 150 pounds 
(75 kilograms), when applied in any direction that the vehicle would  move.
Breakaway devices shall be compatible  with  a  standard  acceptable  to  the 
department.

  History: 2008 AACS.


               Chapter 4 Design considerations at specific locations


R 29.7038  Outdoor locations.
  Rule 38. Sections 4-1, 4-1.1, and 4-1.2 were  reproduced  from   NFPA   50A 
as follows:
4-1 Outdoor Locations.
4-1.1 Where protective walls or roofs are provided, they shall be constructed 
of noncombustible or limited-combustible materials.
4-1.2 Electrical equipment within 15 feet (4.6 m) shall be in accordance with 
Article 501 of NFPA 70, National Electrical Code®, for Class  I,  Division  2 
locations.

  History: 2008 AACS.


R 29.7039  Separate buildings.
  Rule 39. Sections 4-2.1, 4-2.4 to 4-2.6 are reproduced  from   NFPA    50A, 
and sections 4-2.2, and  4-2.3  of  the  storage  and  handling  of   gaseous 
and Liquefied H2 code are added as follows:
4-2 Separate buildings.
4-2.1  Separate  buildings  shall  be  constructed   of   noncombustible   or 
limited-combustible materials. Windows and doors shall be located so as to be 
readily accessible in case of emergency.
Exception:  Window glazing shall be permitted to be plastic.
4-2.2 Ventilation to the outdoors shall be provided.  Inlet openings shall be 
located within 18 inches (30 centimeters) of  the  floor  in  exterior  walls 
only.  Outlet openings shall be located at the high  point  of  the  room  in 
exterior walls or roof.  Inlet and outlet openings shall each have a  minimum 
total area of 1 square foot/1,000  cubic  feet  (1  square  meters/305  cubic 
meters) of room volume.  Discharge from outlet openings shall be directed  or 
conducted to the atmosphere.
4-2.3 Deflagration venting shall be provided in exterior walls or roof only.
4-2.3.1 Vents shall be any 1 or any combination of the following:
  (a) Walls of light material.
  (b) Lightly fastened hatch covers.
  (c) Lightly fastened, outward opening doors in exterior walls.
  (d) Lightly fastened walls or roof.
  (e) Other methods in accordance with NFPA 69.
4-2.3.2 Where applicable, snow loads shall be considered.
4-2.4 There shall be no sources of  ignition  from  open  flames,  electrical 
equipment, or heating equipment.
4-2.5 Electrical equipment shall be in accordance with Article  501  of  NFPA 
70, National Electrical Code, for Class I, Division 2 locations.
4-2.6 Heating, if provided, shall be by steam, hot water, or  other  indirect 
means except that electrical heating may be used if in compliance with 4-2.5.

  History: 2008 AACS.


R 29.7040  Special rooms.
  Rule 40. Sections 4-3.2 to 4-3.6  are  reproduced  from  NFPA   50A,    and 
sections 4-3.1, 4-3.7 to 4-3.9, and table 4-3.9 of the storage  and  handling 
of gaseous and Liquefied H2 code are added as follows:
4-3 Special rooms.
4-3.1 Floor, walls, and ceiling shall be  constructed  of  noncombustible  or 
limited-combustible materials.  Interior walls or  partitions  shall  have  a 
fire resistance rating of at least 2 hours, shall be continuous from floor to 
ceiling, and shall be securely  anchored.   At  least  1  wall  shall  be  an 
exterior wall.  Windows and doors shall  be  located  so  as  to  be  readily 
accessible in case of emergency.
Exception: Window glazing may be of plastic.
4-3.1.1 If access to the room from  outside  the  primary  structure  is  not 
possible, access from within the primary structure shall be  made  through  1 
vapor-sealing 2-hour self-closing fire door.
4-3.2 Ventilation shall be as provided in section 4-2.2.
4-3.3 Explosion venting shall be as provided in section 4-2.3.
4-3.4 There shall be no sources of  ignition  from  open  flames,  electrical 
equipment, or heating equipment.
4-3.5 Electrical equipment shall be in accordance with Article  501  of  NFPA 
70, National Electrical Code, for Class I, Division 2 locations.
4-3.6 Heating, if provided, shall be by steam, hot water, or  indirect  means 
except that electrical heating shall be permitted to be used if in compliance 
with 4-3.5.
4-3.7 Room ventilation.
4-3.7.1 The ventilation shall be at least  1  cubic  feet/minute/square  feet 
(0.3 cubic meters/minute/square meters) of room area, but  not  less  than  1 
cubic foot/minute/12 cubic feet (0.3 cubic meters/minute/3.7 cubic meters) of 
room volume and shall be designed such  that  an  accumulation  of  H2  at  a 
concentration equal to or greater than 25% of the  lower  flammability  limit 
shall not occur in any part of the room.
4-3.7.2  Where installed, a gas detection system shall be equipped  to  sound 
an alarm and visually indicate when a maximum of 25% of the  lower  flammable 
limit is reached.  At 40% of the lower  flammable  limit  the  gas  detection 
system shall shut down the hydrogen system and provide  notification  to  the 
system operator.
4-3.7.3 Any failure of the ventilation system shall immediately shut down the 
fueling system and provide notification to the system operator.  Reactivation 
of the fueling system shall be by manual restart and shall  be  conducted  by 
trained personnel.
4-3.7.4 The gas detection system shall  function  during  ventilation  system 
maintenance operations.
4-3.7.5 A ventilation system  for  a  room  within  or  attached  to  another 
building shall  be  designed  to  ensure  that  all  areas  serviced  by  the 
ventilation system meet  performance requirements in accordance with  section 
4-3.7 during the normal operating conditions and during alarm conditions.
4-3.8 Warning signs.
4-3.8.1 Access doors shall have warning signs with the words  "WARNING  -  NO 
SMOKING - NON ODORIZED FLAMMABLE GAS - NO OPEN FLAMES.  The wording shall  be 
in  plainly  legible,  bright  red  letters  not  less  than  1  inch   (2.54 
centimeters) high on a white background.
4-3.9 Indoor attended fast-fill fueling.
4-3.9.1 Attended indoor fast-fill fueling system shall be in accordance  with 
subsections (a) to (k) of this section.
  (a) Gas storage equipment shall be located outdoors unless   approved    by 
the department.  Gas processing and compression  equipment  shall  be  listed
 or approved for indoor use or located outdoors.
  (b) An emergency  manual  shutdown  device  shall  be  located    in    the 
dispensing area not less than 20 feet (6.1 meters) and not  more   than   100 
feet  (30.5 meters) in the path  of  egress  from  the  dispensing   area.
Actuation   of   the  emergency  manual  shutdown  device  shall  perform  in 
accordance with  subsection (h) of this section.
  (c) The dispenser shall be equipped with a gas  detection   system    which 
shall actuate in accordance with subsection (h)  of  this  section   when   a 
maximum  of 25% of LFL is detected (1% H2 in air).
  (d) The dispenser shall be equipped with a leak detection  system   capable 
of identifying a leak from the dispensing  system  outside   the    dispenser 
housing by conducting a pre-fill pressure test.  The leak detection must   be 
capable of detecting a minimum leak rate of 1.9  gallons/minute   and   shall 
actuate  in accordance with subsection (h) of this section  when  a  leak  is 
detected.
  (e)  Whether  the  fill  is   communicated   or    non-communicated,    the 
dispensing system must be listed, labeled, or approved to  insure  that   the 
fills  are protective of the safety of the temperature, pressure   and   flow 
rate  of  the on-board fuel system during fueling.
  (f) The dispensing area shall be equipped with a fire   detection    system 
and shall actuate in accordance with subsection (h) of this section if a fire
 is detected.
  (g) A ventilation system shall be installed for  the  dispensing   area.
The ventilation system shall be capable  of  delivering  ventilation  air  as 
provided in section 4.3.7.  The ventilation system shall operate   prior   to 
dispenser operation, during fueling, and for at least 1 minute after  fueling 
has  been completed.  The  ventilation  flow  rate  shall  be   monitored.
Failure  or reduction of the ventilation flow rate below the  required   flow 
rate  shall shut down the dispensing system.
Exception:  A dispensing area ventilation system is  not  required  when  the 
fuel delivery per refueling event is less than those listed in table 4-3.9.

Table 4-3.9

  

    

      

      
Room 
Size 
      (m3)
      

      

Maximum 
      fuel  delivery  per  refueling  event  that  does  not   require   room 
ventilation 
      (kg)
    
    

      

      

1000
      

      

0.8
    
    

      

      

2000
      

      

1.7
    
    

      

      

3000
      

      

2.5
    
    

      

      

4000
      

      

3.3
    
    

      

      

5000
      

      

4.2
    
  


  (h) The actuation of any 1 of the systems listed in subsections (b) to  (g) 
of this section shall be in accordance with table 4-3.9, and shall shut  down 
the dispenser, stop the flow of gas into the room, and start or continue   to 
run the ventilation system, if required.
1. Reactivation of the dispenser and gas flow  into  the  room  shall  be  by 
manual restart and shall be conducted by trained personnel.
  (i) Interior walls, doors, and window openings within 15 feet (4.6  meters) 
of the dispenser shall be constructed of materials having a fire  rating   of 
at least 2 hours.  Wall penetrations shall require  use  of    listed    fire 
rated equipment.
  (j) The owner/operator shall not allow hot work/open flames    within    15 
feet (4.6 meters) of the refueling location unless the  dispenser   is   shut 
down, depressurized, and purged.
  (k) If H2 is to be removed from the  vehicle  storage  system,   H2   shall 
be discharged into a  closed  transfer  system  or   vented    outdoors    in 
accordance with CGA G-5.5, "Hydrogen Vent Systems", adopted by  reference  in 
section 8-1.

  History: 2008 AACS.


R 29.7041  Indoor H2 storage system location.
  Rule 41. Sections 4-4 to 4-4.6, and table 4-4.1of the storage and  handling 
of gaseous and Liquefied H2 code are added as follows:
4-4 Indoor H2 storage system location.
4-4.1 H2 systems of less than 3,500 scf (99 cubic meters)  and  greater  than 
the maximum allowable quantity found in table  4.4.1,  where  located  inside 
buildings outside of special rooms, shall be located in the building so  that 
the system will be as follows:
  (a) In a ventilated area in accordance with the provisions of section 4-3.7.
  (b) Separated from incompatible materials.
  (c) 15 feet (4.6 meters) from ordinary electrical equipment,  and  25  feet 
(7.6 meters) from open flames or welding or other sources of ignition.
  (d) 50 feet (15.2 meters) from other  low-pressure  flammable  gas  storage 
(less than 500 psig).
  (e) Protected against damage in  accordance  with   the    provisions    of 
section 2.1.5.

Table 4-4.1 Quantity Thresholds for Gases Requiring Special Provisions


 

    

      

      

      
      

      

      Material
      

      

      
      Unsprinklered 
areas
      

      

      
      Sprinklered 
areas
    
    

      

      

      No gas cabinet, gas 
      room, or exhausted enclosure
      

      

      Gas  cabinet,  gas 
room, 
      or exhausted enclosure
      

      

      No gas cabinet, gas 
      room, or exhausted enclosure
      

      

      Gas  cabinet,  gas 
room, 
      or exhausted enclosure
    
    

      

      

      
      Cryogenic liquid 
      (flammable or oxidizing)
      

      

      
      45 gal

      

      

      
      90 gal

      

      

      
      90 gal

      

      

      
      180   gal

    
    

      

      

      
      Flammable gas 
      liquefied nonliquefied
      

      

      
      14  kg3  
(30 
      lb)
      

      
      28 m3 
      (1,000 ft3)
      

      

      
      27  kg3  
(60 
      lb)
      

      
      28 m3 
      (2,000 ft3)
      

      

      
      27  kg3  
(60 
      lb)
      

      
      28 m3 
      (2,000 ft3)
      

      

      
      55  kg3  
(120 
      lb)
      

      
      56 m3 
      (4,000 ft3)
    
  


4-4.2 More than 1 system of 3,500 scf (99 cubic  meters)  or  less  shall  be 
permitted to be installed in the same room or area outside of special  rooms, 
provided the systems are separated by at least 50 feet (15.2 meters), or by a 
full height fire-resistive partition having a minimum fire resistance  rating 
of 2 hours is located between the systems.
4-4.3 Each  system  described  in  section  4-4.2  shall  meet  all  of   the 
requirements of section 4-4.1.
4-4.4 The separation distance between multiple systems of 3,500 scf (99 cubic 
meters) or less shall be permitted to be reduced to 25 feet (7.6  meters)  in 
buildings where the space  between  storage  areas  is  free  of  combustible 
materials and protected with a sprinkler system.
4-4.5 When sprinkler protection is provided, the area in which H2  is  stored 
or used shall be protected with a sprinkler system designed to  be  not  less 
than that required by NFPA 13, "Standard for the  Installation  of  Sprinkler 
Systems," adopted by reference in section 8-1, for ordinary  hazard  group  2 
with a minimum design area of 3,000 square feet (914.4 square meters).
4-4.6 When sprinkler protection is provided, the area  in  which  the  H2  is 
stored or used shall be protected with a sprinkler system designed to be  not 
less than that required  by  NFPA  13,  "Standard  for  the  Installation  of 
Sprinkler Systems," adopted by reference in section  8-1,  for  extra  hazard 
group 1 with a minimum design area of 2,500 square feet (762 square meters).

  History: 2008 AACS.


R 29.7042  Canopies.
  Rule 42. Sections 4-5 to 4-5.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
4-5 Canopies.
4-5.1 A container installation that has a canopy or  roof  shall  have  prior 
approval by the department based on the  best  interests  of  public  health, 
safety, and welfare and the environment.  This canopy or roof shall not limit 
the dissipation of heat or dispersion of flammable vapors and cannot restrict 
firefighting access and control.
4-5.2 A roof or canopy must meet all of the following conditions:
  (a) The lowest elevation of the roof or canopy shall not be less   than   4 
feet (1.8 meters) from the top of the container.
  (b) All container vent(s) are extended through the roof or canopy.
  (c) The roof or canopy is constructed in such a way that  it    will    not 
allow vapors to accumulate under the canopy or roof.
  (d) Be constructed of noncombustible materials

  History: 2008 AACS.


R 29.7043  Fast-fill station.
  Rule 43. Sections 4-6 to 4-6.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
4-6 Fast-fill station.
4-6.1 Each line between a gas storage facility and a dispenser at a fast-fill 
station shall have a valve that closes when 1 of the following occurs:
  (a) The power supply to the dispenser is cut off.
  (b) Any emergency shutdown device at the refueling station is activated.
4-6.2 A manual shutoff  valve  shall  be  provided  at  a  fast-fill  station 
upstream of the breakaway device  specified  in  section  3-5,  where  it  is 
readily accessible  to  the  person  dispensing  H2,  unless  either  of  the 
following occurs:
  (a) The  self-closing  valve  referred   to   in    section    4-6.1     is 
located immediately upstream of the dispenser.
  (b) The dispenser is equipped with a self-closing valve  that  closes  each 
time the dispenser is deactivated or when an emergency device is activated.

  History: 2008 AACS.


R 29.7044  Vehicle fueling appliances in nonresidential occupancies.
  Rule 44. Sections 4-7 to 4-7.7 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
4-7 Vehicle fueling appliances (VFA) in nonresidential occupancies.
4-7.1 VFAs shall not exceed a gas flow of 36 scf/minute.
4-7.2 VFAs shall be listed.
4-7.3 VFAs may be used to fill stationary  containers  at  vehicular  fueling 
locations.
4-7.4 A  VFAs  installed  with  storage  containers  shall  comply  with  the 
provisions of chapters 2, 3, and 4.
4-7.5 The  installation  of  VFAs  at  a  residence  shall  comply  with  the 
requirements of section 4-9.
4-7.6 Where more than 1 VFA are located in a common area, spacing between the 
VFAs shall not be less than  3  feet  (1  meter),  unless  permitted  in  the 
manufacturer's recommendations.
4-7.7 Unless specifically permitted  in  the  manufacture's  recommendations, 
multiple VFAs shall not be manifolded together on the discharge side.

  History: 2008 AACS.


R 29.7045  Installation of electrical equipment.
  Rule 45. Sections 4-8 to 4-8.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
4-8 Installation of electrical equipment.
4-8.1 Electrical equipment and wiring shall be  specified  and  installed  in 
accordance with NFPA 70, "National Electrical Code," adopted by reference  in 
section 8-1.
4-8.2 Static protection shall be required when  gaseous  H2  cargo  transport 
vehicles are loaded or unloaded.  This can be achieved when  cargo  transport 
vehicles or marine equipment are  loaded  or  unloaded  by  grounding  cable, 
conductive hose, flexible metallic tubing, or  pipe  connections  where  both 
halves of metallic couplings are in contact.

  History: 2008 AACS.


R 29.7046  Residential fueling facility.
  Rule 46. Sections 4-9 to 4-9.11 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
4-9 Residential fueling facility (RFF).
4-9.1 Application.   This  section  applies  to  the  design,   construction, 
installation, and operation of an RFF.
4-9.2 Storage of H2 in quantities not exceeding 3,500 scf (99  cubic  meters) 
at 12,500 psig shall be permitted in systems listed by a national  recognized 
testing laboratory.
4-9.2.1 The RFF may store H2 indoors or outdoors.  Indoor storage of H2 shall 
not exceed 3,500 scf (99 cubic meters) at 7,700  psig  provided  that  indoor 
storage is ventilated per section 4-3.7, or storage shall be  in  a  separate 
sealed enclosure ventilated directly to outdoors.
4-9.3 System component qualifications.   System  components  not  part  of  a 
listed fueling appliance shall comply  with  the  appropriate  provisions  of 
chapter 2.
4-9.3.1 Fueling appliances shall be listed.
4-9.4 General safety requirements.  All equipment related to RFF installation 
shall be protected to minimize  the  possibilities  of  physical  damage  and 
vandalism.  The use of an enclosure for the compressor  package,  similar  to 
that of a central  air  conditioner,  shall  be  permitted  to  satisfy  this 
requirement.
4-9.4.1 All equipment related to RFF installation shall be designed  for  the 
pressure, temperature, and service expected.
4-9.4.2 Vehicles shall not be considered a source of ignition.
Exception: Vehicles containing fuel-fired  equipment,  such  as  recreational 
vehicles, shall be considered a source of ignition unless this  equipment  is 
shutoff completely before entering an area in which  ignition  sources  shall 
not be permitted.
4-9.4.3 Unless specifically permitted in the manufacturer's  recommendations, 
multiple RFFs shall not be manifolded together on the discharge side.
4-9.4.4 Where more than 1 RFF is located in a common  area,  spacing  between 
the RFFs shall not be less than 3 feet (1  meter)  unless  permitted  by  the 
manufacturer's recommendations.
4-9.5 Installation.
4-9.5.1 General.    All   RFF   equipment   shall   include    manufacturer's 
recommendations and such  recommendations  shall  include,  but  may  not  be 
limited to, the requirements for  the  proper  installation,  operation,  and 
maintenance of the RFF.  The RFF shall be installed, operated, and maintained 
in accordance with the manufacturer's recommendations.
4-9.5.1.1 The RFF shall have a nameplate marked with minimum and maximum  gas 
inlet pressure and flow rate, gas outlet  maximum  pressure,  and  electrical 
requirements.
4-9.5.2 Indoors.  Where it is necessary to install the compression  unit  and 
refueling connections indoors, the  compression  unit  shall  be  mounted  or 
otherwise located such that the compression unit is vented outdoors.
4-9.5.2.1 Where the RFF or the vehicle being fueled is located indoors, a gas 
detector set to operate at 1/5 25% the lower  limit  of  flammability  of  H2 
shall be installed in the room.
4-9.5.2.2 The detector shall be located within 6 inches (15.2 centimeters) of 
the ceiling or the highest point in the room.
4-9.5.2.3 The detector shall stop the flow of H2 and operate an audible or  a 
visual alarm.
4-9.6 Installation of pressure  relief  valves  shall  have  pressure  relief 
device vents or vent lines to convey escaping gas to the  outdoors  and  then 
upward to a safe area to prevent impinging on buildings, other equipment,  or 
areas open to the public, such as sidewalks.
4-9.7 Piping and hose.  A fueling hose shall be limited to a  maximum  length 
of 25 feet (7.62 meters) and shall be protected from mechanical  damage  from 
abrasion and from being driven over by a vehicle.
4-9.7.1 Transfer systems shall be capable of  depressurizing  the  nozzle  to 
facilitate disconnection.  Bleed connections shall lead to a  safe  point  of 
discharge.
4-9.8 Testing.   All  piping  and  tubing  shall  be  tested  after  assembly 
according to section 2-6.
4-9.9 Installation of emergency shutdown equipment.  An RFF shall be equipped 
with emergency manual shut down of the fuel supply prior to the RFF device.
The emergency manual shutdown actuator shall be at least 5 feet (1.52 meters) 
from the RFF and in view of the RFF.
4-9.9.1 Breakaway protection shall be provided in a manner so  that,  in  the 
event of a pull away, H2 ceases to flow.
4-9.9.1.1 The  breakaway  devices  shall  comply  with  ANSI/CSA   HGV   4.4, 
"breakaway devices for dispensing systems," adopted by reference  in  section 
8-1.
4-9.9.1.2 A breakaway device shall be installed at every dispensing point.
4-9.9.1.3 The breakaway device in 4-9.8.2.3 shall  be  arranged  to  separate 
using a force not greater than 150 pounds (75 kilograms) when  applied  in  a 
horizontal direction.
4-9.10 Operation.   An  RFF  shall  be  operated  in  accordance   with   the 
manufacturer's instructions.
4-9.10.1 A fuel supply container shall  not  be  charged  in  excess  of  its 
maximum allowable service pressure at normal temperature.
4-9.10.2 U.S. DOT containers shall be charged in  accordance  with  U.S.  DOT 
regulations.
4-9.10.3 Where H2 is being transferred to a motor vehicle, the  engine  shall 
be turned off.
4-9.11 Maintenance and inspection.  All RFF equipment shall be inspected  and 
maintained in accordance with the manufacturer's instructions.

  History: 2008 AACS.


                      Chapter 5 Operation and maintenance


R 29.7047  Operation.
  Rule 47. Section 5-1 is reproduced from NFPA 50A,  and  sections  5-1.1  to 
5-1.3 of the storage and handling of gaseous and Liquefied  H2    code    are 
added  as follows:
5-1 Operation.   For installations that require any operation of equipment by 
the user, instructions shall be maintained at operating locations.
5-1.1 A vehicle container shall not be  charged  in  excess  of  the  service 
pressure compensated for the differences in temperature from nominal.
5-1.2 H2 vehicle containers shall not be subjected to pressure in  excess  of 
125% of the marked service pressure even if, on cooling, the pressure settles 
to the marked service pressure.
5-1.3 Where an  overpressure  incident  that  results  in  operation  of  the 
overpressure  protection  system  of  the  dispenser  occurs,  the  dispenser 
pressure control system shall  be  examined  and  certified  by  a  qualified 
operator prior to being returned to service.

  History: 2008 AACS.


R 29.7048  Maintenance.
  Rule 48. Section 5-2 is reproduced from  NFPA  50A,  and   sections   5-2.1 
to 5-2.11 of the storage and handling of gaseous and Liquefied  H2  code  are 
added as follows:
5-2 Maintenance. Each hydrogen system installed on consumer premises shall be 
inspected annually and  maintained  by  a  qualified  representative  of  the 
equipment owner.
5-2.1 Hoses, nozzles and breakaways shall be examined visually to ensure that 
they  are  safe  for  use  and  shall  be  maintained  in   accordance   with 
manufacturer's instructions on at least  a  quarterly  basis  or  earlier  if 
required by the manufacturer  
5-2.2  Hose  shall  be  tested  for  leaks  per  manufacturer's  requirements 
and  any leakage shall be a reason for  rejection 
and replacement.
5-2.3 Testing shall be carried out with helium or with helium/  H2  blend  as 
the test gas or if this is not possible, with H2 using suitable precautions.
5-2.4 The  facility  operator  shall  maintain  a  maintenance  log  in  good 
condition  and  accessible  to  department  inspection.   Records  shall   be 
maintained for a minimum of 2 years.
5-2.5 Controllers on fuel stations shall be designed to verify the  integrity 
of the fuel hose, breakaway, nozzle, and  receptacle  by  pressurizing  these 
components to at least the vehicle backpressure and  checking  pressure  drop 
prior to the start of fueling.
5-2.6  Containers  and  their  appurtenances,  piping  systems,   compression 
equipment, controls, and detection devices shall be maintained  in  operating 
condition and according to manufacturer's instructions.
5-2.7 Pressure relief valves shall be maintained in operating condition.
5-2.8 Maintenance personnel shall be trained in leak detection procedures.
5-2.9 Area within 10 feet (3.1  meters)  of  dispenser  shall  be  free  from 
debris, weeds and other material that present a fire hazard.
5-2.10 Safety, gas detection, and fire protection equipment shall  be  tested 
or inspected at intervals not to exceed 6 months.
5-2.11 Maintenance activities on fire control equipment shall be scheduled so 
that a minimum of equipment is taken out of service at any 1  time  and  fire 
prevention safety is not compromised.

  History: 2008 AACS.


R 29.7049  Clearance to combustibles.
  Rule 49. Section 5-3 of the storage and handling of gaseous  and  Liquefied 
H2 code is added as follows:
5-3 Clearance to combustibles.  The area within 10 feet (3.1 meters)  of  any 
H2 container shall be kept free of dry vegetation and combustible material.

  History: 2008 AACS.


R 29.7050  Cathodic protection maintenance.
  Rule 50. Sections 5-4 and 5-4.1 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
5-4 Cathodic protection maintenance.
5-4.1(a) Owners and  operators  shall  ensure  that  all  metallic  container 
systems that are underground, mounded, or partially underground are protected 
and maintained to minimize corrosion as cited in  the  NACE  standard  RP0169 
entitled "Recommended Practice, Control of External Corrosion of  Underground 
or Submerged Metallic Piping Systems" and NACE  recommended  practice  RP0285 
entitled "Corrosion Control of Underground Storage Tank Systems  by  Cathodic 
Protection."
  (b) All corrosion protection systems shall  be  operated    and  maintained 
to continuously provide corrosion  protection  to   the    metal   components 
of  the portion  of  the  ASME  approved  container  system   that  routinely 
contains H2  gas and that is in contact with the ground.
  (c) All container systems equipped with cathodic protection  systems  shall 
be inspected for proper operation by a  NACE  certified  cathodic  protection 
tester as defined in section 1-5.  The H2 system shall  be  tested  within  6 
months  of installation and at least once each calendar year at intervals not 
to  exceed 15 months.
  (d)  Container  systems  equipped  with    impressed    current    cathodic 
protection systems shall be inspected by the owner every 60  days  to  ensure
 that  the equipment is operating within design specifications.   The  design 
limits shall be readily available.
  (e) If container systems are equipped  with  cathodic   protection,    then 
the owner or operator shall maintain records  to   demonstrate    that    the 
cathodic protection is in compliance with the performance standards  of  this 
section.
The records shall provide both of the following:
  (1) The results of the last 3 inspections required in subsection   (d)   of 
this section.
(3) The results of testing from the last 2 inspections required in subsection 
(c) of this section.
  (f) Within 6  months   following   the   repair   of    any    cathodically 
protected container system, where the repairs may affect the operation of the
 cathodic protection system, the system shall be tested in  accordance   with 
subsections (c) and (d) of this  section  to  ensure  that  it  is  operating 
properly.
  (g) Repairs or  replacement  of  a  cathodic  protection  system  shall  be 
conducted by a NACE certified corrosion expert as  defined  in  section  1-5.
  General system maintenance of the  cathodic  protection  system  including,
 but  not limited to, replacement of fuses, and splicing of cable  would  not 
be required to be designed by a corrosion expert and shall be approved by the
 department to not increase the hazard  to  public  health,    safety,    and 
welfare  and  the environment.

  History: 2008 AACS.


R 29.7051  Stray or impressed currents and bonding.
  Rule 51. Sections 5-5 to 5-5.3 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
5-5 Stray or impressed currents and bonding.
5-5.1 Where stray or impressed  currents  are  used  or  can  be  present  on 
dispensing systems, such  as  cathodic  protection,  protective  measures  to 
prevent ignition shall be taken.
5-5.2 Static protection between the fuel dispenser and the vehicle shall  not 
be required where H2 is transferred by  conductive  hose,  flexible  metallic 
tubing, or pipe connections where both halves of the metallic  couplings  are 
in continuous contact.
5-5.3 The transfer surface shall be concrete or shall have a resistivity  not 
exceeding API-RP 2003, "protection against ignitions arising out  of  static, 
lightning,  and  stray  currents,"  adopted  by  reference  in  section  8-1, 
performance criteria of 1 megohm as measured using a method acceptable to the 
department, such as EN 1081 1998 "Resilient Floor Coverings  -  Determination 
of the Electrical Resistance.", adopted by reference in section 8-1.

  History: 2008 AACS.


R 29.7052  Emergency plan.
  Rule 52. Sections 5-6 to 5-6.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
5-6 Emergency plan.
5-6.1 An emergency plan shall be prepared and  updated  wherever  gaseous  or 
liquefied H2 are produced, handled, stored, or used.
5-6.2 The plan shall be available  to  the  department  for  inspection  upon 
reasonable notice and shall include the following information:
  (a) The type of emergency equipment available and its location.
  (b) A brief description of  any  testing  or  maintenance   programs    for 
the available emergency equipment.
  (c) An indication that hazard identification labeling is    provided    for 
each storage area.
  (d) Location of posted emergency procedures.
  (e) A material safety data sheet (MSDS or equivalent) that  is    available 
for the gaseous or liquefied H2 stored or used on the site.
  (f) A list of personnel or site operating authority who   are    designated 
and trained to  be  liaison  personnel  for  the  fire  department  and   who 
are responsible for, but shall not be limited to, the following:
  (1) Aiding the emergency responders in pre-emergency planning.
  (2) Identifying the location of the gaseous and liquefied H2 stored or used.
  (3) Accessing material safety data sheets.
  (4) Knowledge of the site emergency procedures.
  (g) A list of types and quantities of gaseous  and  liquefied   H2    found 
within the facility.

  History: 2008 AACS.


R 29.7053  Release of H2.
  Rule 53. Sections 5-7 to 5-7.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
5-7 Release of H2.
5-7.1 Records of unexpected discharges.  Accurate records of  the  unexpected 
discharge of gaseous or liquefied H2 shall be kept by the facility  and  made 
readily available upon request.  The records shall be kept for a minimum of 2 
years.
5-7.2 Container  or  PRD  failure.   When  an  unexpected  discharge  due  to 
container or PRD failure is discovered the  department  and  the  local  fire 
department shall be immediately notified, and the container shall be repaired 
or be removed from service.

  History: 2008 AACS.


R 29.7054  Security.
  Rule 54. Sections 5-8 and 5-8.1 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
5-8 Security.
5-8.1 Compressed gas cylinders, containers,  and  systems  shall  be  secured 
against accidental dislodgement and against access by unauthorized personnel.

  History: 2008 AACS.


R 29.7055  Leaks, damage, or corrosion.
  Rule 55. Sections 5-9 and 5-9.1 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
5-9 Leaks, damage, or corrosion.
5-9.1 Leaking, damaged, or corroded gaseous H2 systems shall be removed  from 
service, replaced, or repaired.

  History: 2008 AACS.


                           Chapter 6 Fire protection


R 29.7056  Fire protection; caution.
  Rule 56. Section 6-1 is reproduced from NFPA 50A as follows:
6-1 Caution.    Personnel  shall  be  cautioned  that  hydrogen  flames   are 
practically invisible.

  History: 2008 AACS.


R 29.7057  Signage.
  Rule 57. Sections 6-2 to 6-2.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
6-2 Hazard  identification  signs  shall  be  conspicuously  placed  at   all 
locations where H2 gas is produced, stored, used, or handled.
6-2.1 Ratings shall be assigned in accordance with NFPA 704, standard  system 
for the identification of the hazards of materials for emergency response.
6-2.2 The hazard classification of the metal hydride storage system shall  be 
based on the H2 stored without regard to the metal hydride content.

  History: 2008 AACS.


R 29.7058  Identification signs.
  Rule 58. Sections 6-3 to 6-3.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
6-3 Signs prohibiting smoking or open flames  within  25  feet  (7.6  meters) 
shall be provided where H2 gas is produced, stored, or used.
6-3.1 A sign with the following legends printed in red capital letters  on  a 
white background shall be conspicuously posted:
"NONODORIZED FLAMMABLE GAS - NO SMOKING - NO OPEN FLAMES"  All  lettering  on 
signage shall be 3 inches (7.62 centimeters) or more.
Exception: This does not apply  to  motor  vehicle  dispensing  per  sections 
7.2.16 and 4-3.8.1.
6-3.2 Identification signs.  Visible hazard  identification  signs  shall  be 
provided in accordance with NFPA 704, "Standard System for the Identification 
of the Hazards of Materials for Emergency Response," adopted by reference  in 
section 8-1, at entrances to buildings or areas  in  which  liquefied  H2  is 
stored, handled, or used.

  History: 2008 AACS.


R 29.7059  Fire protection.
  Rule 59. Section 6-4 of the storage and handling of gaseous  and  Liquefied 
H2 code is added as follows:
6-4 A portable fire extinguisher having a rating of not less than 40-B:C,  or 
2 20-B:C, shall be located within 75  feet  (22.9  meters)  from  the  pumps, 
dispensers,  and  container  fill  openings.   Fire  extinguishers  shall  be 
inspected and maintained according to NFPA 10, "standard  for  portable  fire 
extinguishers," adopted by reference in section 8-1.1.

  History: 2008 AACS.


R 29.7060  Sprinkler protection.
  Rule 60. Section 6-5 of the storage and handling of gaseous  and  Liquefied 
H2 code is added as follows:
6-5 When sprinkler protection is provided, the area in which H2 is stored  or 
used shall be protected with an automatic sprinkler system designed to be not 
less than that required  by  NFPA  13,  "standard  for  the  installation  of 
sprinkler systems," adopted by reference in section 8-1.

  History: 2008 AACS.


   Chapter 7 Gaseous hydrogen compression, gas processing, storage, and
  dispensing systems


R 29.7061  System component qualifications.
  Rule 61. Section 7-1 of the storage and handling of gaseous  and  Liquefied 
H2 code is added as follows:
7-1 System component qualifications.  System components shall comply with the 
appropriate provisions of chapters 2 and 3 of this part.

  History: 2008 AACS.


R 29.7062  General system requirements.
  Rule 62. Sections 7-2 to 7-2.18 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
7-2 General system requirements.
7-2.1 All fuel dispensing  facilities  shall  meet  the  provisions  of  this 
chapter.
7-2.2 Compression, processing, generation, storage, and dispensing  equipment 
shall  be  protected  to  prevent  damage  from  vehicles  and  minimize  the 
possibilities of physical damage and vandalism and meet the  requirements  of 
section 2-1.5 and section 3-4.4.
7-2.2.1 Access to storage,  compression,  and  gas  processing  equipment  by 
members of the public shall be restricted by a suitable secure area.
7-2.3 Control devices shall be installed so that internal or  external  icing 
does not cause vehicle or fueling station malfunction.
7-2.4 Vehicles shall not be considered a source of ignition with  respect  to 
the provisions of this chapter.
Exception: Vehicles containing fuel-fired  equipment,  such  as  recreational 
vehicles and catering trucks, shall be considered a source of ignition unless 
this equipment is shut off  completely  before  entering  an  area  in  which 
ignition sources are not permitted.
7-2.5 The fueling connection shall  prevent  the  escape  of  gas  where  the 
connector is not properly engaged or becomes separated.
7-2.6 Fueling nozzles for H2 service shall  be  in  accordance  with  section 
2-12.1.
7-2.7 Compression and gas processing equipment shall be designed for use with 
H2 and for maximum pressures and temperatures to which it  can  be  subjected 
under normal operating conditions.
7-2.8 Compression and gas processing equipment  shall  have  pressure  relief 
devices that limit each stage  pressure  to  the  maximum  allowable  working 
pressure for the compression cylinder and piping associated with  that  stage 
of compression and meets the requirements of chapter 2.
7-2.9 H2 compression equipment shall be equipped with  appropriate  automatic 
shutdown controls.
7-2.10 Control circuits that shut  down  shall  remain  down  until  manually 
activated or reset by qualified personnel.
7-2.11 Engine-driven compressor installations shall conform where  applicable 
to R 29.5101 et seq.
7-2.12 Gas  processing  equipment,  including  compression   and   generation 
equipment, in processes where liquid is present, shall incorporate  means  to 
minimize liquid carryover to the storage system.
7-2.13 A hazard analysis shall  be  conducted  on  every  H2  fueling  system 
installation by a qualified engineer with  proven  expertise  in  H2  fueling 
systems and installations.
Exception: This does not apply to section 4-9.
7-2.13.1 The hazard analysis shall include the  following:   fire  protection 
measures, fire protection and suppression  systems,  detection  systems,  and 
ventilation.
7-2.13.2 At a minimum, the hazard analysis  shall  include  consideration  of 
potential failures in  hoses,  nozzles,  dispensing  equipment,  as  well  as 
failures for maintenance and service.
7-2.13.3 Method used for hazard analysis shall be 1 or combination of several 
of the following  recognized  procedures:   hazard  and  operability  studies 
(HAZOPs), failure mode effects and criticality analysis (FMECA),  preliminary 
hazards analysis (PHA), fault tree analysis (FTA)  and  event  tree  analysis 
(ETA).  Other analysis methods, when used, shall ensure same level of  system 
safety as provided by any of the recognized procedures and be  acceptable  to 
the department based on the best interest of the public health,  safety,  and 
welfare and the environment.
7-2.13.4 Standard designs that have been analyzed  by  recognized  procedures 
need  not  be  studied  each  and  every  time  such  installation  occurs.
Site-specific elements that are unique to the installation shall be  reviewed 
in concert with the analysis performed on the standard system to ensure  that 
the standard design has not been altered  in  a  way  that  would  negatively 
affect the hazard analysis.
7-2.13.5 These hazard  analyses  shall  be  available  for  review  at  final 
inspection, prior to the installation being placed  into  service,  shall  be 
maintained on site, and be available to the department upon request.
7-2.14 Dispensing systems shall be equipped to stop fuel  flow  automatically 
when a fuel supply container reaches the temperature-corrected fill pressure.
7-2.15 Dispensing systems shall be equipped with an  overpressure  protection 
device set at 140 percent of the service pressure of the  fueling  nozzle  it 
supplies.
7-2.16 Warning signs shall be conspicuously posted in the dispensing area and 
shall incorporate the following  or  equivalent  wording:   "Stop  Motor,  No 
Smoking, Non-Odorized Flammable Gas.  No Filling Of Portable Containers In Or 
On A Motor Vehicle." 7-2.17 Each H2 -dispensing device shall be  located  not 
less than 10 feet  (3.1  meters)   from   property   lines,    openings    to 
buildings,  and  buildings  of combustible wall construction.   A  dispensing 
device shall not be less than 20 feet (6.1 meters)  from  any  activity  that 
involves a fixed source of ignition.
 In addition, a dispenser shall not be placed beneath a power line.
7-2.18 Each container filling location that is open to the public shall  have 
an attendant or supervisor on duty who  meets  the  requirements  of  section 
1-10.1 of the rules.

  History: 2008 AACS.
 

R 29.7063  Operating requirements for full-service H2 motor  fuel  dispensing 
facilities.
  Rule 63. Sections 7-3 to 7-3.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
7-3 Operating  requirements  for  full-service  H2  motor   fuel   dispensing 
facilities.
7-3.1 Each  motor  fuel  dispensing  facility  shall  have  an  attendant  or 
supervisor on duty whenever the facility is open for business.  The attendant 
or supervisor shall dispense H2 into fuel tanks of  motor  vehicles  or  into 
portable containers.
7-3.2 The provisions of section 2-1 of  this  part  shall  not  prohibit  the 
temporary use of  a  portable  storage  container  in  conjunction  with  the 
dispensing of H2 into a container or motor  vehicle  or  motorized  equipment 
which is on the premises and which  is  not  accessible  to  the  public.   A 
portable storage container installation shall only be made with the  approval 
of the department and comply with all the requirements of section 2-13.

  History: 2008 AACS.


R 29.7064   Operating  requirements  for  attended  self-service  motor  fuel 
dispensing facilities.
  Rule 64. Sections 7-4 to 7-4.5 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
7-4 Operating requirements for attended self-service  motor  fuel  dispensing 
facilities.
7-4.1 Self-service motor fuel dispensing facility means  that  portion  of  a 
property where H2 used as motor fuel is  stored  and  dispensed  from  fixed, 
approved dispensing equipment into the fuel containers of motor  vehicles  by 
persons other than the facility  attendant  and  shall  also  include,  where 
provided, facilities for sale of other retail products.
7-4.2 There shall be at least 1 attendant  on  duty  while  the  self-service 
facility is open for business.  The attendant's primary function shall be  to 
supervise, observe, and control the dispensing of H2 while the H2 is actually 
being dispensed.
7-4.3 The responsibility of the attendant shall be as follows:
  (a) Prevent the dispensing of H2 into portable containers in  or    on    a 
motor vehicle.
  (b) Control sources of ignition.
  (c) Immediately activate emergency controls and notify the fire  department 
of any fire.
The attendant or supervisor on duty shall be mentally and physically  capable 
of performing the functions and assuming  the  responsibility  prescribed  in 
section 7-4.3.
7-4.4 Operating instructions shall be conspicuously posted in the  dispensing 
area.
7-4.5 The dispensing area shall  at  all  times  be  in  clear  view  of  the 
attendant, and the placing or allowing of any obstacle to  come  between  the 
dispensing area and the attendant control area is prohibited.   This  may  be 
achieved by cameras, mirrors, or both.  The attendant shall at all  times  be 
able to communicate with persons in the dispensing area.

  History: 2008 AACS.


R 29.7065  Operating requirements  for  unattended  self-service  motor  fuel 
dispensing facilities.
  Rule 65. Sections 7-5 to 7-5.5 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
7-5 Operating requirements for unattended self-service motor fuel  dispensing 
facilities.
7-5.1 Unattended self-service shall be permitted subject to the  approval  of 
the department based on the best interests  of  public  health,  safety,  and 
welfare and the environment.  Users shall use a key, card,  or  other  method 
which is unique to each user, and which is provided by the facility operator, 
and shall be properly trained in  dispensing  operations.   The  owner  shall 
verify such training to the department upon request.
7-5.2 At least 1 emergency shutoff device specified in section 7-6  shall  be 
provided, and shall be reset only by the owner or an owner's authorized agent.
7-5.3 Operating instructions shall be conspicuously posted in the  dispensing 
area.  The instructions shall include the location of emergency controls.
7-5.4 In addition to the warning signs specified in  section  6-3,  emergency 
instructions shall be  conspicuously  posted  in  the  dispenser  area.   The 
instructions shall incorporate the following or equivalent wording:
"Emergency instructions In case of fire:
  (1) Use emergency stop button.
  (2) Report  accident  by  calling  the   local   fire    number.     Report 
location." 
7-5.5 A telephone or other approved, clearly identified  means   to  notify   
the fire department shall  be  provided   on   the   site   in   a   location 
approved  by  the department.

  History: 2008 AACS. 


R 29.7066  Emergency shutoff devices.
  Rule 66. Sections 7-6 to 7-6.1 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
7-6 Emergency shutoff devices.
7-6.1 H2 dispensing  systems  shall  be  provided  with  1  or  more  clearly 
identified  emergency  shutoff  devices  or  electrical  disconnects  at  the 
dispensing area.  Such devices or disconnects shall be installed in  approved 
locations but not less than 10 feet (3.1 meters) and not more than  100  feet 
(30.5 meters) away from the dispensing area and which is along the  means  of 
egress.  Emergency shutoff devices or electrical disconnects shall disconnect 
power and gas supply to all dispensing devices, to all remote  pumps  serving 
the dispensing devices, and to  all  associated  power.   When  more  than  1 
emergency shutoff device or electrical disconnect is  provided,  all  devices 
shall be interconnected.  Resetting from an emergency shutoff  shall  require 
manual intervention and the manner of resetting  shall  be  approved  by  the 
department.

  History: 2008 AACS.


R 29.7067  Refueling from transport vehicles.
  Rule 67. Sections 7-7 to 7-7.11 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
7-7 Refueling from transport vehicles.  The dispensing of H2 in the open from 
a transport vehicle to a motor vehicle  located  at  commercial,  industrial, 
governmental,  or  manufacturing  establishments  and  intended  for  fueling 
vehicles used in connection with their businesses shall be permitted  if  all 
of the requirements of sections 7-7.1 to 7-7.11 have been met.
7-7.1 The department shall be notified  before  commencing  operations  under 
section 7-7.
7-7.2 The transport vehicle shall comply with U.S. DOT requirements  for  the 
transportation of H2.
7-7.3 Nighttime deliveries shall only be made in an  area  considered  to  be 
adequately lighted.
7-7.4 The transport vehicle  flasher  lights  shall  be  in  operation  while 
dispensing operations are in progress.
7-7.5 Smoking materials, including matches, lighters, and  other  sources  of 
ignition, including torches, shall not be used within 20 feet (6.1 meters) of 
the dispensing of H2 in the open from a transport vehicle to a motor vehicle.
7-7.6 Each area where dispensing of H2 in the open from a  transport  vehicle 
to a motor vehicle shall be provided with 1 or more listed fire extinguishers 
that have a minimum capability of 40-B:C.  The fire  extinguishers  shall  be 
readily accessible to the dispensing operation.  Fire extinguishers shall  be 
inspected  and  maintained  under  NFPA  10,  "Standard  for  Portable   Fire 
Extinguishers," adopted by reference in section 8-1.
7-7.7 Mobile fueling shall take  place  aboveground,  shall  not  be  beneath 
electric power lines or where exposed  by  their  failure,  and  shall  be  a 
minimum of 10 feet (3.1 meters) from the nearest important building, property 
line, or combustible storage.
7-7.8 Transport vehicle brakes shall be set and  chock  blocks  shall  be  in 
place.
7-7.9 Persons performing dispensing operations shall be qualified to  deliver 
and dispense H2 fuels.  Operations of  transport  vehicles  used  for  mobile 
fueling operations shall have access  on-site  or  be  in  possession  of  an 
emergency communications device to notify the proper authorities if there  is 
an emergency.
7-7.10 The transport vehicles shall be positioned with  respect  to  vehicles 
being fueled to prevent traffic from  driving  over  the  delivery  hose  and 
between the transport vehicle and motor vehicle being fueled.  The dispensing 
hose shall be  properly  placed  on  an  approved  reel  or  in  an  approved 
compartment before moving the transport vehicle.
7-7.11 Additional requirements.  The transfer area must meet the requirements 
of section 5-5.

  History: 2008 AACS.


                       Chapter 8 Referenced publications


R 29.7068  Referenced publications.
  Rule 68. Sections 8-1 to 8-1.2.10 of the storage and handling  of   gaseous 
and Liquefied H2 code are added as follows:
8-1 The following documents or portions thereof are  referenced  within  this 
standard as mandatory requirements  and  shall  be  considered  part  of  the 
requirements of this standard.  The edition  indicated  for  each  referenced 
mandatory document is the current  edition,  and  cost  as  of  the  date  of 
issuance of these rules.  Copies of the adopted  publications  are  available 
for inspection at the office of  the  Department  of  Environmental  Quality, 
Waste and Hazardous Materials Division, Storage Tank Unit,  P.O.  Box  30241, 
Lansing, Michigan 48909-7741.
8-1.1 NFPA   publications.    National   Fire   Protection   Association.   1 
Batterymarch Park, P.O. Box 9101, Quincy, Massachusetts 02269-9101.
NFPA 10, "Standard for Portable Fire Extinguishers," 2002 edition, $36.50.
NFPA 13, "Standard for the Installation of Sprinkler Systems," 2002  edition, 
$70.00.
NFPA 51, "Standard for the Design and Installation of Oxygen-Fuel Gas Systems 
for Welding, Cutting, and Allied Processes," 2002 edition, $28.00.
NFPA 52, "Vehicle Fuel Systems Code," 2006 edition, $36.00.
NFPA 55, "Standard for the Storage, Use, and Handling of Compressed Gases and 
Cryogenic Fluids  in  Portable  and  Stationary  Containers,  Cylinders,  and 
Tanks," 2005 edition, $36.50.
NFPA 69, "Standard on Explosion Prevention Systems," 2002 edition, $33.50.
NFPA 70, "National Electrical Code," 2005 edition, $75.00.
NFPA 101, "Life Safety Code," 2006 edition, $75.00.
NFPA 220, "Standard on Types of Building Construction," 1999 edition, $28.00.
NFPA 496, "Standard for Purged  and  Pressurized  Enclosures  for  Electrical 
Equipment," 2003 edition, $33.50.
NFPA 704, "Standard System for the Identification of the Hazards of Materials 
for Emergency Response," 2001 edition, $33.50.
8-1.2 Other publications.
8-1.2.1 ASME publications.  American Society of Mechanical  Engineers,  Three 
Park Avenue, New York, New York 10016-5990.
ANSI/ASME B31.3, "Process Piping," 2002 edition, $240.00.
ASME International, "Boiler and Pressure Vessel  Code,  Section  VIII,"  2004 
edition, $525.00.
8-1.2.2  ASTM publication.  American Society for Testing and  Materials,  100 
Barr Harbor Drive, West Conshohocken, Pennsylvania 19428-2959.
ASTM E136-04, "Standard Test Method for Behavior of Materials in  a  Vertical 
Tube Furnace at 750 Degrees C," 2004 edition, $35.00.
8-1.2.3  CGA publications.  Compressed Gas Association, 1725 Jefferson  Davis 
Highway, Arlington Virginia 22202-4100.
CGA S-1.1, "Pressure Relief  Device  Standards  -  Part  1  -  Cylinders  for 
Compressed Gases," 2002 edition, $196.00.
CGA S-1.2, "Pressure Relief Device Standards - Part 2 -  Cargo  and  Portable 
Tanks for Compressed Gases," 1995 edition, $145.00.
CGA S-1.3, "Pressure Relief Device Standards - Part 3  -  Stationary  Storage 
Containers for Compressed Gases," 2003 edition, $145.00.
ANSI/CGA C-4, "Method  of  Marking  Portable  Compressed  Gas  Containers  to 
Identify the Material Contained," 2003 edition, $252.00.
CGA C-7, "Guide to the Preparation of Precautionary Labeling and  Marking  of 
Compressed Gas Containers," 2000 edition, $268.00.
CGA G-5.5, "Hydrogen Vent Systems," 2004 edition, $39.00.
8-1.2.4   IAS  publications.   International  Approval  Services,  8501  East 
Pleasant Valley Road, Cleveland, Ohio 44131.
ANSI/IAS NGV 4.4, "Breakaway Devices for Dispensing Systems,"  1999  edition, 
$57.00.
8-1.2.5 NACE  publications.   National  Association  of  Corrosion  Engineers 
International, 1440 South Creek Drive, Houston, Texas 77084.
NACE RP0169, "Control of  External  Corrosion  of  Underground  or  Submerged 
Metallic Piping Systems," 2002 edition, $42.00.
NACE RP0285, "Corrosion  Control  of  Underground  Storage  Tank  Systems  by 
Cathodic Protection," 2002 edition, $37.00.
8-1.2.6 SAE publications.  Society of Automotive Engineers, 400  Commonwealth 
Drive, Warrendale, Pennsylvania 15096.
SAE J2600, "Compressed Hydrogen Surface Vehicle Fueling Connection  Devices," 
2002 edition, $59.00.
8-1.2.7 International codes council.  4051 West Flossmore Road, Country  Club 
Hills, Illinois 60478-5795.
"International Fire Code," 2006 edition, section 2209.3.2.6, $61.50.
8-1.2.8  U.S. Government  publications.   U.S.  Government  Printing  Office, 
Washington, DC 20402.
Title 49, Code of Federal Regulations, "Transportation," Parts 171-190,  U.S.
Department of Transportation "Specifications and  Regulations."  
8-1.2.9    ECS   publications.       European      Committee       for        
Standardization,      Central  Secretariat:  rue  de  Stassart  36,   B-1050, 
Brussels.
EN  1081,  "Resilient  Floor  Coverings,  Determination  of  the   Electrical 
Resistance," 1998 edition, $32.00.
8-1.2.10 API publications.  American  Petroleum  Institute,  1220  L  Street, 
Northwest, Washington, DC, 20005-5-4070.
API Recommended Practice 2003, "Protection Against Ignitions Arising  Out  of 
Static, Lightning, and Stray Currents," 7th edition, $111.00.

  History: 2008 AACS. 


       PART 3.  STORAGE AND HANDLING OF LIQUEFIED HYDROGEN NFPA 50B

                          Chapter 1 General information

R 29.7070  Scope.
  Rule 70. Sections 1-1 to 1-1.3 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-1 Scope.
1-1.1 Application.  This standard covers the  requirements  for  the  design, 
siting,   construction,   installation,   spill    containment,    operation, 
maintenance, and dispensing from a liquefied H2 system.
1-1.2 Nothing in this H2 code  shall  be  intended  to  prevent  the  use  of 
systems, methods, or devices of equivalent  or  superior  quality,  strength, 
fire  resistance,   effectiveness,   durability,   environmental   protection 
capability, or safety over those prescribed by this  H2  code,  if  technical 
documentation is submitted to the department to demonstrate  equivalency  and 
the system, method, or device is approved for the intended purpose.
1-1.3 This code shall apply to the design and installation  of  liquefied  H2 
dispensing systems.
Exception: Dispensing into rail and aircraft.

  History: 2008 AACS.


R 29.7071  Retroactivity.
  Rule 71. Sections 1-2 and 1-2.1of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-2 Retroactivity.
1-2.1 The provisions of this H2 code are necessary to  provide  a  reasonable 
level of protection from loss of life and property from fire and explosion.
The provisions shall reflect situations and the state of  the  art  prevalent 
when the H2 code was  issued.   Unless  otherwise  noted,  it  shall  not  be 
intended that the provisions of  this  H2  code  be  applied  to  facilities, 
equipment, structures, or installations that were existing  or  approved  for 
construction or installation before the  effective  date  of  this  H2  code, 
except in those cases where it is  determined  by  the  department  that  the 
existing situation involves a distinct hazard to public health,  safety,  and 
welfare, and the environment.

  History: 2008 AACS.


R 29.7072  Definitions.
  Rule 72. Section 1-3 of the storage and handling of gaseous  and  Liquefied 
H2 code is added and section 1-3.1 is reproduced from NFPA 50B as follows:
1-3 Definitions.
  (a) "ANSI" means the american national standards institute.
  (b) "Approved" means acceptable to the department.
  (c) "ASME" means the american society of mechanical engineers.
  (d) "Authority having jurisdiction" means the department.
  (e)  "Automatic   emergency   shutoff   valve"    means    a     designated 
fail-safe automatic closing valve designed to shut off the flow   of    gases 
or  liquids that is initiated by a control system where the  control   system 
is  activated by either manual or automatic means.
  (f) "Bulk  storage"  means  a  single  container  or   containers,    where 
all containers draw down at the same time.
  (g) "Cargo transport  container"  means  a  mobile   unit    designed    to 
transport gaseous or liquefied H2.
  (h) "Cascade   storage   system"   means   storage   in    containers    or 
cylinders arranged in banks where each bank acts as 1 large  container.   The 
banks  are separated by switching valves to provide  sequential  drawdown  of 
the  banks.
The bank may consist of 1 or more containers or cylinders.
  (i) "Cathodic protection" means a technique to prevent  the  corrosion   of 
a metal surface by making the surface the cathode of an electrochemical cell.
This protection renders a metallic container or piping  component  negatively 
charged with respect to its environment.  This protection shall  be  designed 
by a corrosion expert as defined by these rules.
  (j) "Cathodic protection tester"  means  a  person  who   can   demonstrate 
an understanding of the principles and  measurements  of  all  common   types 
of cathodic protection systems applicable to  metal  piping   and   container 
systems and who has education and experience  in  soil   resistivity,   stray 
current, structure-to-soil potential, and  component   electrical   isolation 
measurements of metal piping and container systems.  The  person   shall   be 
certified  as being qualified by the national  association    of    corrosion 
engineers  (NACE) international.
  (k) "Composite container"  means  a  container  fabricated  of  2  or  more 
materials that interact to facilitate the container design criteria.
  (l) "Compression discharge pressure" means the varying  pressure   at   the 
point of discharge from the compressor.
  (m) "CGA" means the compressed gas association.
  (n) "Container" means a pressure vessel or cylinder used to store H2.
  (o) "Container  appurtenances"  means  devices  connected   to    container 
openings for safety, control, or operating purposes.
  (p) "Container system" means a container or combination of  containers  and 
all attached appurtenances, valves, and piping.
  (q) "Container valve"  means  a   valve   connected   directly    to    the 
container outlet.
  (r) "Continuous gas detection system" means a gas  detection   system    in 
which the instrument is maintained in continuous operation.
  (s) "Corrosion expert" means a person who, by reason of thorough  knowledge 
of the  physical  sciences  and   the   principals   of    engineering    and 
mathematics acquired by a professional education  and    related    practical 
experience,  is qualified to  engage   in   the   practice    of    corrosion 
control  of  container systems.  The person shall be  certificated  as  being 
qualified by NACE,  as  a senior   corrosion   technologist,    a    cathodic 
protection  specialist,  or   a  corrosion  specialist  or  be  a  registered 
engineer who  has  certification  and licensing that includes  education  and 
experience in corrosion control.
  (t) "Corrosion protection" means protecting a container system  to  prevent 
the degradation  of  the  metal  through  oxidation  or    reactivity    with 
its environment.
  (u) "Cryogenic fluid" means a fluid with a  boiling  point    lower    than 
-130 degrees Fahrenheit (-90 degrees Celsius) at an absolute   pressure    of 
101.325 kPa (14.7 psia).
  (v) "Cylinder" means a container constructed  in  accordance    with    the 
United States Department of Transportation specifications, Title 49, code  of 
federal regulations (CFR), parts 171-190.
  (w) "Department" means the department of environmental quality.
  (x) "Director" means  the  director  of  the  department  of  environmental 
quality.
  (y) "Dispensing station" means an H2  installation  that    dispenses    H2 
from  storage  containers  into  fuel  supply  containers  or  into  portable 
cylinders  by means of a compressor, reformer, vaporizer, or pressure booster.
  (z) "Emergency shutdown device (ESD)" means  a  device  that   closes   all 
fueling operations within the fueling facility from either  local  or  remote 
locations.
  (aa) "Excess flow control" means to limit or stop the flow of H2 gas   from 
a source of supply,  when  there  is  a  rupture,  break,  or   'open   valve 
to atmosphere'  condition  that  may  present  a  hazard  to   personnel   or 
the environment.
  (bb) "Fail-safe" means a design feature that provides for  the  maintenance 
of safe operating conditions in the event of a malfunction of control devices 
or an interruption of an energy source.
  (cc) "Fixed liquid level device" means  a  device  that   indicates    when 
the container is filled to its maximum permitted liquid filling volume.
  (dd) "Flow-through  process  container"  means  a  container   that   forms 
an integral part of a production  process  through   which   there    is    a 
steady, variable, recurring, or intermittent flow of materials  during    the 
operation of the process and the container is utilized to  carry    out    or 
control  the heating,  cooling,  mixing,  blending,   separating,   metering, 
or   chemical reaction of materials.  The processing is  done  on  a  regular 
basis and  it  is the primary function  of  the  container.   A  flow-through 
process container does not include a container that is used for  the  storage 
of materials before  its introduction into the production process   or    for 
the  storage  of   finished  products  or  by-products  from  the  production 
process or a  container  that  is only used to recirculate materials.
  (ee) "Fuel dispenser system" means all the pumps, meters,  piping,    hose, 
and controls used for the delivery of fuel.
  (ff) "Fueling connector" means  a  mating   device   at    the    refueling 
station, including shutoff valves that connect  the  fueling  dispenser  hose
 to  the vehicle fuel filling system receptacle for the transfer of liquid or 
vapor.
  (gg) "Gallon water capacity (wc)" means the amount of water in  gallons  at 
60 degrees Fahrenheit (15.6 degrees Celsius) required to fill a container.
  (hh) "Gas detection system" means a grouping of 1 or more  sensors  capable 
of detecting an H2 leak at specified concentrations and   activating   alarms 
and safety systems.
  (ii) "Gaseous H2 system" means a system  in  which  the  H2  is  delivered, 
stored, and discharged in the gaseous form including the piping system.   The 
gaseous H2 system terminates at the point where the H2 is dispensed.
  (jj) "Hydrogen (H2)" means the simplest and lightest   element    in    the 
known universe, which exists as a gas except at low cryogenic temperatures.
H2 gas is a colorless, odorless and highly  flammable  gas  when  mixed  with 
oxygen over a  wide  range  of  concentrations.   H2   forms    water    when 
combusted,  or  when otherwise joined with oxygen, as within a fuel cell.
  (kk) "Hydrogen code" means  the  storage  and  handling  of   gaseous   and 
liquefied H2 rules as promulgated by the department.
  (ll) "Hydrogen gas vehicle (HGV) or vehicle" means a self-propelled  device 
on land; in, on, or by which any person or property is or may be  transported 
or drawn upon, except  for a device exclusively moved by human   power;   and 
which has the capability to use H2 gas as an engine fuel.
  (mm)  "Ignition source" means any item or   substance   capable    of    an 
energy release of type and magnitude sufficient  to  ignite   any   flammable 
mixture  of gases or vapors that could occur at the site.
  (nn) "kPa" means absolute pressure in kilo-Pascals.
  (oo) "kPag" means gauge pressure in kilo-Pascals.
  (pp) "Labeled"  means equipment or materials to which  has  been   attached 
a label,  symbol,  or  other  identifying  mark  of  an   organization   that 
is acceptable to the department and  concerned  with   product    evaluation, 
that maintains  periodic  inspection  of  production  of  labeled   equipment
  or materials, and by whose labeling the manufacturer indicates   compliance 
with accepted or approved standards of construction and or performance.
  (qq) "Liquefied hydrogen system" means a system into which   liquefied   H2 
is delivered and stored and from which it is  discharged  in  the  liquid  or 
gaseous form including the piping system.  The liquid or  gaseous  H2  system 
terminates at the point where the H2 is dispensed.
  (rr)  "Listed" means equipment, materials, or services  included    in    a 
list published by an  organization  that  is  acceptable  to  the  department
 and concerned with evaluation of products or  services,    that    maintains 
periodic inspection of production listed equipment or materials  or  periodic 
evaluation of services, and whose listing states that either  the  equipment, 
material, or service meets  appropriate  designated  standards  or  has  been 
tested  and  found suitable for a specified purpose.
  (ss) "Manifolded storage system" means  storage  in   containers   arranged 
in banks where each bank acts as 1 large container.  The banks are  separated 
by switching valves to provide sequential drawdown of the banks.   The   bank 
may consist of 1 or more containers.
  (tt) "Manual emergency shutoff valve" means a designated   valve   designed 
to shut off flow due to a rupture in pressurized piping system.
  (uu) "Maximum allowable  working  pressure  (MAWP)"  means   the    maximum 
pressure to which any component or portion of  the  pressure  system  can  be 
subjected.
  (vv) "Maximum  operating  pressure  (MOP)"  means  the  steady-state  gauge 
pressure at which a part or system normally operates.
  (ww) "Metal hydride storage system" means a system for the storage  of   H2 
gas absorbed in solid material.
  (xx) "Motor fuel dispensing  facility"  means   that   portion    of    the 
property where H2 is stored and dispensed from fixed equipment into the  fuel 
tanks  of motor vehicles or marine craft  or  into    approved    containers, 
including  all equipment used in connection therewith.
  (yy)   "NACE"   means   the    national    association     of     corrosion 
engineers, international.
  (zz)  "Original  equipment  manufacturer   (OEM)"   means    an    original 
equipment motor vehicle manufacturer that certifies that  the  motor  vehicle
 complies with applicable federal motor vehicle safety codes.
  (aaa)  "Partially buried container" means a container that has  part    of, 
but less than 100%, of the container surface covered with earth.
  (bbb)  "Point of transfer" means the point where the  transfer   connection 
is made.
  (ccc) "Portable container" means a container designed to be moved  readily, 
as distinguished  from  containers  designed  for  stationary  installations.
Portable containers, designed for transportation  with  H2  filled  to  their 
maximum filling limit, include  "cylinders,"  "cargo  tanks,"  and  "portable 
tanks," all 3 of which are defined separately.   Containers  designed  to  be 
readily moved from 1 usage location to another, but  substantially  empty  of 
product, are "portable storage containers" and are defined separately.
  (ddd) "Portable  storage  container"  means  a   container    similar    to 
those designed and constructed for stationary installation, designed so  that 
it can be moved readily over the highways, substantially empty  of  liquefied 
H2, from 1 usage location to another.  Such  containers  either   have   legs 
or  other supports attached, or are  mounted  on  running  gear,   such    as 
trailer  or semitrailer chassis, with suitable supports that  can    be    of 
the  fold-down type, allowing them to be  placed  or  parked  in   a   stable 
position  on  a reasonably  firm  and  level  surface.    For   large-volume, 
limited-duration product usage, such as at construction sites  and   normally 
for  6  months  or less, portable storage containers function  in   lieu   of 
permanently  installed stationary containers.
  (eee) "Portable tank, or skid tank" means a  container   of    more    than 
1,000 pounds (454 kilograms) water capacity used  to  transport  H2   handled 
as  a package, that is, filled  to  its  maximum  permitted  filling  limit.
 Such containers  are  mounted  on  skids  or  runners    and    have     all 
container appurtenances protected in such a manner that they  can  be  safely 
handled as a package.
  (fff) "Pressure  relief  device"  means   a   pressure    or    temperature 
activated device used to prevent pressure from  rising  above   a   specified 
value  and thereby prevent the rupture of  a  normally    charged    pressure 
vessel  or  a cylinder due to emergency or abnormal conditions.
  (ggg) "Pressure vessel" means a container  or  other   component   designed 
in accordance with the ASME code.
  (hhh) "psi" means pounds per square inch.
  (iii) "psia" means pounds per square inch, absolute.
  (jjj) "psig" means pounds per square inch gauge.
  (kkk) "Rated pressure" means the pressure  to  which   a    component    is 
rated provided that the MAWP is observed for temperature extremes.
  (lll) "Release" means an unexpected discharge of H2.
  (mmm) "Remotely located manually  activated  shutdown  control"   means   a 
control system that is designed to initiate shut down of the flow of  gas  or
 liquid that is manually activated from  a  point  located   some    distance 
from  the delivery system.
  (nnn) "Service pressure" means the nominal gas  pressure  at   a    uniform 
gas temperature  of  70  degrees  Fahrenheit  (15.6  degrees  Celsius)   when 
the equipment is properly and completely charged with  gas;    the    nominal 
design pressure for which the equipment has been constructed.
  (ooo) "Set pressure" means the  start-to-discharge  pressure  for  which  a 
relief valve is set and marked.
  (ppp) "Standard cubic foot (scf)" means 1 cubic  foot  of   gas    at    70 
degrees Fahrenheit (21 degrees Celsius) and 14.7 psia (101 kPa).
  (qqq) "Standard cubic foot per minute (scfm)" means the amount of gas  flow 
in standard cubic feet per minute compensated for pressure and temperature.
  (rrr) "Substantially empty" means a gas container of H2 when  the  residual 
gas pressure is less than 10% of the maximum allowable working  pressure   of 
the vessel.  A liquefied H2 container is  substantially  empty    when    the 
liquid level within the container is less than 10% of  its  normal  operating 
volume.
  (sss) "Vaporizer" means a device other than a container that  receives   H2 
in liquid form and adds sufficient heat to convert the liquid  to  a  gaseous 
state.
  (ttt) "Vehicle-fueling appliance" means a  self-contained  listed  assembly 
used for the compression and delivery  of  H2   into    vehicles    including 
associated equipment and piping of the appliance.
1-3.1 NFPA official definitions.
Combustible liquid. A liquid having a closed-cup  flash  point  at  or  above 
100°F (37.8°C) and are subdivided as follows:
  (a) Class II liquids include those having a flash point   at    or    above 
100°F (37.8°C) and below 140°F (60°C).
  (b) Class IIIA liquids include those having a flash point  at   or    above 
140°F (60°C) and below 200°F (93.4°C).
  (c) Class IIIB liquids include those having a flash point  at   or    above 
200°F (93.4°C).
Flammable liquid (Class I). Any liquid having a closed-cup flash point  below 
100°F (37.8°C) and having a vapor pressure not exceeding 40 psia (276 kPa) at 
100°F (37.8°C).
Gallon. A standard U.S. gallon.
Limited-Combustible Material. A material, as defined in NFPA  220,   Standard 
on Types of Building Construction,  not  complying  with  the  definition  of 
noncombustible material that, in  the  form  in  which  it  is  used,  has  a 
potential heat value not exceeding 3500 Btu/lb (8141 kJ/kg) and complies with 
one of the following paragraphs (a) or (b). Materials subject to an  increase 
in  combustibility  or  flame  spread  rating,  beyond  the   limits   herein 
established, through the effects  of  age,  moisture,  or  other  atmospheric 
condition are considered combustible.
  (a)  Materials having a structural base of noncombustible  material,   with 
a surfacing not exceeding a thickness of 1/8 in. (3.2  mm)   that    has    a 
flame spread rating not greater than 50.
  (b)  Materials, in the form and thickness used, other than  as  described in
(a), having neither a flame spread rating greater than  25   nor   evidence 
of continued progressive combustion and of such composition  that    surfaces 
that would be exposed by cutting through the material  on  any  plane   would 
have neither a flame spread rating greater  than   25   nor    evidence    of 
continued progressive combustion.
Noncombustible material. A material, as defined  in  NFPA  220,  Standard  on 
Types of Building Construction, that, in the form in which  it  is  used  and 
under the conditions anticipated, will not ignite, burn, support  combustion, 
or release flammable  vapors  when  subjected  to  fire  or  heat.  Materials 
reported as noncombustible, when  tested  in  accordance  with  ASTM  E  136, 
Standard Method of Test for Behavior of Materials in a Vertical Tube  Furnace 
at 750°C, are considered noncombustible materials.
Outdoors. Location outside of any building or structure or locations under  a 
roof, weather shelter, or canopy provided this area is not enclosed  on  more 
than two sides.
Separate building. A detached, noncommunicating building used exclusively  to 
house a hydrogen system.
Shall. Indicates a mandatory requirement.
Special room. A separate enclosed area that is part of or attached to another 
building and is used exclusively for a hydrogen system.
Standard. A  document,  the  main  text  of  which  contains  only  mandatory 
provisions using the word "shall" to indicate requirements and which is in  a 
form generally suitable for mandatory reference by another standard  or  code 
or for adoption into law. Nonmandatory provisions  shall  be  located  in  an 
appendix, footnote, or fine-print note and are not to be considered a part of 
the requirements of a standard.

  History: 2008 AACS.


R 29.7073  Prohibitions.
  Rule 73. Sections 1-4 to 1-4.4 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-4 Prohibitions.
1-4.1 Any liquefied H2 storage container system or practice that  is  not  in 
compliance with these rules shall be considered to be in violation  of  these 
rules.
1-4.2 Upon notification  by  the  department,  a  person  shall  not  deliver 
liquefied H2 to a storage container system under any circumstances  that  are 
prohibited by these rules or if a container is not in compliance  with  these 
rules.  Such notification may include a verbal or written communication or an 
affixed written notification on the H2 system.
1-4.3 A  person  shall  not  tamper  with,  remove,  or   disregard   written 
notification affixed to the storage container system.
1-4.4 An owner or operator shall not continue  to  use  a  storage  container 
system that is causing a release and shall expeditiously empty the system  or 
the component that is causing the release until the  system  is  repaired  or 
replaced.

  History: 2008 AACS.


R 29.7074  Installation application.
  Rule 74. Sections 1-5 to 1-5.4 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-5 Installation application.
1-5.1 An application for plan review shall be submitted, on a  form  provided 
by the department, by the owner or owner's designee on behalf of the owner to 
the department not less than 30 days before the installation of an H2 storage 
container system.
1-5.1.1 The installation application  shall  include  all  of  the  following 
information:
  (a) A plot map showing all of the following within 100 feet  (30.5  meters) 
of any portion from the container system:
  (i) The location of the following:
  (A) Buildings.
  (B) Public roadways.
  (C) Railroad mainlines.
  (D) Public sidewalks.
  (E) Overhead power lines.
  (ii) The proposed location of the dispensing station.
  (iii) The location of property lines.
  (iv) The locations of  existing  aboveground   and    underground    tanks 
storing flammable and combustible liquids, and  flammable,   compressed    or 
liquefied gases.
  (v) The location of the point of transfer in  relationship  to   all    of 
the following:
  (A) The container.
  (B) Buildings.
  (C) Public ways.
  (D) Outdoor places of public assembly.
  (E) Driveways.
  (F) Main line railroad track center lines.
  (G) The line of adjoining property that may be built upon.
  (H)  Aboveground  and   underground   tanks    storing    flammable     and 
combustible liquids and/or flammable, compressed, or liquefied gases.
  (b) The construction material,  the  dimensions  and  the    capacity    of 
each container.
  (c) The type of container venting and pressure relief.
  (d) The compressor(s) size (psig and scfm).
  (e) Container appurtenances.
  (f) A piping diagram showing sizes, valves, pressure relief  and  fittings, 
and control devices.
1-5.2 Upon acknowledged receipt of the plans, the department  shall  issue  a 
plan review report within 30 days.  If the plan review report is  not  issued 
within 30  days,  the  installation  may  be  constructed  according  to  the 
submitted plans and shall be in compliance with these rules.
1-5.3 An applicant  shall  notify  the  department  upon  completion  of  the 
installation before the installation is placed into service.  The  department 
shall inspect the installation after receiving notification and shall certify 
the installation,  if  the  requirements  of  the  rules  are  met.   If  the 
inspection is not made within 2 working days, then the  applicant  may  place 
the installation into service, or if intended to be underground, mounded,  or 
partially underground, may cover  the  installation  from  sight,  and  shall 
notify the  department,  and  shall  submit  a  notarized  affidavit  to  the 
department attesting to the fact that  the  installation  complies  with  the 
installation application submitted and the applicable rules.
1-5.4 Upon the  owner's  request,  all  plans  and  specifications  that  are 
submitted to the department for review shall be returned after the department 
has certified the installation or within 30 working days  after  notification 
to  the  department  of  the  completion  of  the  installation.   Plans  and 
specifications may be marked "Confidential-Do Not Copy" at the time they  are 
submitted.

  History: 2008 AACS.


R 29.7075  Installation application fees and annual certification.
  Rule 75. Sections 1-6 to 1-6.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-6 Installation application fees and annual certification.
1-6.1 Only an owner of an H2  container  system  for  which  an  installation 
application is required to be submitted under section  1-5  of  the  H2  code 
shall be required to pay fees as specified in 1941 PA 207, MCL 29.5.
1-6.2 For  the  purpose  of  assessing  fees,  each  liquefied  H2  permanent 
installation, or any  container  filling  location,  shall  be  considered  a 
container, as defined in section 5 of 1941 PA 207, MCL 29.5.

  History: 2008 AACS.


R 29.7076  Equivalency.
  Rule 76. Sections 1-7 to 1-7.3 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-7 Equivalency.
1-7.1 Nothing in this H2 code  shall  be  intended  to  prevent  the  use  of 
systems, methods, or devices having equivalent or superior quality, strength, 
fire  resistance,   effectiveness,   durability,   environmental   protection 
capability, or safety over those prescribed by  the  H2  code,  if  technical 
documentation is submitted to the department to demonstrate  equivalency  and 
the system, method, or device is approved for the intended purpose.
1-7.2 An owner or operator may make an application for a variance of rules by 
applying to the department with a satisfactory explanation of why  compliance 
is not possible.  The  department  may  approve  the  variance  request  upon 
finding that the variance is based upon the best interest of  public  health, 
safety, and welfare, and the environment.
1-7.3 A person aggrieved by a final decision of the department on  a  request 
for variance or an equivalency determination may appeal to the circuit  court 
within 21 days of receiving the decision.

  History: 2008 AACS.


R 29.7077  Personnel.
  Rule 77. Sections 1-8 and 1-8.1 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-8 Personnel.
1-8.1 In the interest of safety, all persons involved in handling H2 shall be 
trained in the proper handling and operating procedures.  This training shall 
be acceptable to the department.
Exception: This training is not required for a person dispensing  H2  into  a 
vehicle at an attended self-service facility.

  History: 2008 AACS.


R 29.7078  Application.
  Rule 78. Sections 1-9 to 1-9.4 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
1-9 Application.
1-9.1 The application of this standard at places  of  public  assembly  shall 
meet the requirements of section 3-2.2(a) and the approval of the department.
1-9.2 This standard does not apply to flow-through process containers.
1-9.3 When required by the department, H2 introduced into any system  covered 
by this code shall have a leak detection system acceptable to the  department 
and based on the best interest of public health, safety, and welfare, and the 
environment.
1-9.4 Liquefied H2 in fuel containers on vehicles and mobile equipment  shall 
not be included in determining the maximum allowable quantities.

  History: 2008 AACS.


                Chapter 2 Design of liquefied hydrogen systems


R 29.7079  Containers.
  Rule 79. Sections 2-1 to 2-1.10.1.3 and  figure  2-1.2  of   the    storage 
and handling of gaseous and Liquefied H2 code are added as follows:
2-1 Containers.
2-1.1 H2 containers shall comply with the following.
  (a)  Storage  containers  shall  be  designed,  constructed,   and   tested 
in accordance with appropriate requirements  of  the   ASME    "Boiler    and 
Pressure Vessel Code," section VIII, "Rules for the Construction of  Pressure 
Vessels," adopted by reference in section 8-1.
  (b) Portable  containers  shall  be  designed,  constructed,   and   tested 
in accordance with title 49 CFR.
  (c) Welding or brazing for the  repair   or   alteration   of    an    ASME 
pressure vessel shall comply with the standard adopted in section 8-1.2.1.
  (d) Other welding or brazing shall be permitted only  on   saddle   plates, 
lugs, or brackets which are attached to the pressure vessel by  the  pressure 
vessel manufacturer.
  (e) The exchange or interchange of pressure vessel  appurtenances  intended 
for the same purpose shall not be considered a  repair  or   alteration   but 
must comply with these rules.
2-1.2 Permanently installed containers shall  be  provided  with  substantial 
supports of noncombustible material securely anchored on firm foundations  of 
noncombustible material, and shall comply with the following  subsections  as 
applicable:
  (a) Steel supports in excess of 18 inches (46 centimeters) in height  shall 
be protected with a protective coating having  a  2-hour   fire    resistance 
rating, see figure 2-1.2.
  (b) If a permanently installed aboveground container is in an   area   that 
is subject to buoyant forces,  provision  shall  be  made  to   prevent   the 
container, either full or empty, from floating during a rise in water  level,
 including up to the established maximum flood stage.
  (c) Horizontally installed containers shall have not more than   2   points 
of support longitudinally or other methods approved by the department   based 
on  the  best  interest  of  public  health,  safety,  and  welfare  and  the 
environment.
  (d) Horizontally installed containers shall not be  in    direct    contact 
with each other.
  (e)  Aboveground  containers  shall  be  protected  by  painting  or  other 
equivalent means where necessary to inhibit corrosion.
  (f) Temperature effects.  Foundations or  supports  that  could   come   in 
contact with the cryogenic fluid in  the  event  of  a  spillage,   such   as 
at  fill connections, and flanges, shall be constructed of materials that are
 capable of withstanding the cryogenic   temperature   effects,    such    as 
concrete  and stainless steel.
  (g) Excessive loads.  Stationary containers shall be supported  to  prevent 
the concentration of excessive  loads  causing  differential  settlement   of 
the support system.
  (h) Expansion and contraction.  Foundations  for   horizontal    containers 
shall  be  constructed  to  accommodate  expansion  and  contraction  of  the 
container.
  (i) Support of ancillary  equipment.   Foundations  shall  be  provided  to 
support the weight of ancillary equipment  such  as  vaporizers  and/or  heat 
exchangers.
 
Figure 2-1.2 in PDF


2-1.3 Marking.  Liquefied H2  containers  and  systems  shall  be  marked  in 
accordance with this section.
2-1.3.1 Portable  containers.   Portable  containers  shall  be   marked   in 
accordance with CGA C-7, "Guide to the Preparation of Precautionary  Labeling 
and Marking of Compressed Gas Containers," adopted by reference in section 8.
2-1.3.2 Stationary containers.  Stationary  containers  shall  be  marked  in 
accordance with NFPA 704, "Standard Systems for  the  Identification  of  the 
Hazards of Materials for Emergency Response," adopted by reference in section 
8.
2-1.3.3 Identification of  contents.   Each  container  shall  be  marked  as 
follows:
LIQUEFIED HYDROGEN - FLAMMABLE GAS in letters that are not less than 3 inches 
(7.62 centimeters) in height.
2-1.3.4 Container specification.  Stationary containers shall be marked  with 
the manufacturing specification and maximum allowable working pressure  on  a 
permanent nameplate in accordance with the standard to  which  the  container 
was manufactured.
2-1.4 An owner or operator  that  has  had  a  container  subjected  to  heat 
exposure due to an engulfing fire, a fire  in  which  at  least  25%  of  the 
container surface is exposed, shall remove the container  from  service,  and 
shall not return the container to  service,  unless  the  owner  or  operator 
provides documentation to substantiate mechanical and  performance  integrity 
of the container in accordance with section 2-1.1 to  the  department.   Such 
documentation shall be issued by a qualified engineer.
2-1.5 Guard posts or other approved means shall  be  provided  to  protect  a 
container  system  subject  to  vehicular  damage.   When  guard  posts   are 
installed, all of the following design specifications shall be met:
  (a) Guard posts shall be constructed of steel not  less  than   4    inches 
(10.16 centimeters) in diameter and shall be filled with concrete.
  (b) Guard posts shall be spaced not more than 4 feet (1.2 meters) on center.
  (c) Guard posts shall be set not less than 4 feet  (1.2  meters)  deep   in 
a concrete footing that is not  less  than  15  inches   (38.1   centimeters) 
in diameter.
  (d) Guard posts shall be not less than 4 feet (1.2  meters)    in    height 
above grade.
  (e) Other means as approved by the department based on the  best  interests 
of public health, safety, and welfare, and the environment.
2-1.6  Physical  protection.   Containers,  piping,  valves,  pressure-relief 
devices, regulating equipment, and other  appurtenances  shall  be  protected 
against physical damage and tampering.
2-1.7 Portable containers subject to shifting or upset  shall  be  secured.
Nesting shall be permitted as a means of securing portable containers.
2-1.8 Overfill protection and  prevention  systems.   An  approved  means  or 
method shall be provided to prevent the overfilling of storage containers.
2-1.9 Vacuum level  monitoring.   An  approved  monitoring  method  shall  be 
provided to indicate vacuum degradation within the vacuum jacket(s).
2-1.10 Underground containers.  Underground containers  for  the  storage  of 
liquefied H2 shall be in accordance with this subsection.
2-1.10.1 Construction.  Storage containers for liquefied H2 shall be designed 
and constructed in accordance with section VIII of ASME "Boiler and  Pressure 
Vessel Code," adopted by reference in section 8, and shall be vacuum-jacketed 
in accordance with section 2-1.10.1.1.
2-1.10.1.1 Vacuum jacket construction.  The vacuum jacket shall  be  designed 
and constructed in accordance with section VIII of ASME "Boiler and  Pressure 
Vessel Code," and shall be designed to  withstand  the  anticipated  loading, 
including loading from vehicular traffic, where applicable.  Portions of  the 
vacuum  jacket  installed  below  grade  shall  be  designed   to   withstand 
anticipated soil, hydrostatic, and seismic loading.
2-1.10.1.2 Material.  The vacuum jacket shall  be  constructed  of  stainless 
steel or other approved corrosion-resistant material.
2-1.10.1.3 Corrosion  protection.   The  underground   container   shall   be 
protected  by  an  engineered  corrosion  protection  system  designed  by  a 
corrosion expert.  If cathodic protection is used  the  maintenance  schedule 
shall meet the requirements of section 5-3.

  History: 2008 AACS.


R 29.7080  Pressure relief devices.
  Rule 80. Sections 2-2.1 to 2-2.5  are  reproduced  from  NFPA   50B,    and 
sections 2-2.6 to 2-2.16 of the storage and handling of gaseous and Liquefied 
H2  code are added as follows:
2-2 Pressure relief devices.
2-2.1  Stationary  liquefied  hydrogen  containers  shall  be  equipped  with 
pressure relief devices sized in accordance with CGA S-1.3,  Pressure  Relief 
Device Standards - Part 3 - Compressed Gas Storage Containers.
2-2.2   Portable   liquefied   hydrogen   containers   complying   with   DOT 
Specifications and Regulations shall be equipped with pressure relief devices 
as required in DOT Specifications and Regulations.  Pressure  relief  devices 
shall be sized in accordance with the requirements  of  CGA  S-1.1,  Pressure 
Relief Device Standards - Part 1 - Cylinders for Compressed  Gases,  and  CGA 
S-1.2, Pressure Relief Device  Standards  -  Part  2  -  Cargo  and  Portable 
Containers for Compressed Gases.
2-2.3 Pressure relief devices shall be arranged to discharge unobstructed  to 
the outdoors and in such a manner  as  to  prevent  impingement  of  escaping 
liquid or gas upon the container, adjacent  structures,  or  personnel.  (See 
3-1.5 for venting of pressure relief devices  in  special  locations.)  
2-2.4 Pressure relief devices or vent piping shall be designed or located  so 
 that moisture cannot collect and freeze in a  manner  that  would  interfere 
 with proper operation of the device.
2-2.5 Pressure relief devices shall be provided in piping wherever  liquefied 
hydrogen could be trapped between closures.
2-2.6 Stationary containers shall be provided with a  sign,  in  letters  not 
less than 1 inch (2.54 centimeters) in height, placed  in  proximity  to  the 
primary container  pressure  relief  valve  vent  stack  that  warns  against 
spraying water on or into the vent opening.
2-2.7 The pressure-relief device shall  have  the  capacity  to  prevent  the 
pressure inside the container from  exceeding  110%  of  the  maximum  design 
pressure.
2-2.8 H2 venting systems discharging to the atmosphere shall be in accordance 
with CGA G-5.5, adopted by reference in section 8.
2-2.9 Components which  come  in  contact  with  cryogenic  H2  under  normal 
operating conditions shall be suitable for operation at a temperature of -430 
degrees Fahrenheit (-236 degrees Celsius).
2-2.10 Individual discharge lines and adapters shall be sized,  located,  and 
secured so as to permit the maximum required  relief  discharge  capacity  to 
minimize the possibility of physical damage.  The discharge  lines  shall  be 
able to withstand the pressure of the relief vapor discharge when the  relief 
is in the full-open position.
2-2.11 Secondary relief devices, designed to  provide  additional  relief  in 
emergencies, shall be piped away from the container independently.
2-2.12 Shutoffs between  pressure-relief  devices  and  containers.   Shutoff 
valves shall not be installed between pressure-relief devices and  containers 
unless the valves or their use meets the requirements of this section.
2-2.12.1 Security.  Shutoff valves shall be of a locking type and  their  use 
shall be limited to service-related work performed by the supplier under  the 
requirements of ASME "Boiler and Pressure Vessel Code," adopted by  reference 
in section 8.
2-2.12.2  Multiple  pressure-relief  devices.   Shutoff  valves   controlling 
multiple pressure-relief devices on a container shall be  installed  so  that 
either the type of valve installed  or  the  arrangement  provides  the  full 
required flow through the minimum number of required relief  devices  at  all 
times.
2-2.13 Safety and relief valves.  Pressure relief  valves  for  liquefied  H2 
systems, if externally adjustable, shall be provided with a means for sealing 
the adjustment to prevent tampering.
2-2.13.1 If at any time it is necessary to break such a seal, the valve shall 
be removed from service until it has been reset and sealed.
2-2.13.2 Adjustments  shall  be  made  only  by  the  manufacturer  or  other 
organizations having competent  personnel  and  facilities  for  the  repair, 
adjustment, and testing of such valves.
2-2.13.3 The organization making such adjustment shall attach a permanent tag 
with the setting, capacity, and date.
2-2.14 The thermal expansion relief valve shall be installed as  required  to 
prevent overpressure in any section of a liquid or cold vapor  pipeline  that 
can be isolated by valves.
2-2.14.1 Thermal expansion relief valves shall be set to discharge above  the 
maximum pressure normally expected in the line but less than the  rated  test 
pressure of the line it protects.
2-2.14.2 Discharge from thermal expansion relief valves shall be directed  so 
as to minimize hazard to personnel and other equipment.
2-2.15 Pressure relief valves shall be tested at least every 5 years.
Exception: Thermal relief valves will not be tested.
2-2.16 Heat exchangers, vaporizers, insulation casing surrounding containers, 
vessels, and coaxial piping systems in which liquefied or cold vapor H2 could 
be trapped shall be provided with a pressure-relief device.

  History: 2008 AACS.


R 29.7081  Piping, tubing, and fittings.
  Rule 81. Sections 2-3.1, and  2-3.4  are  reproduced  from  NFPA  50B,  and 
sections 2-3.2, 2-3.2.1, 2-3.3, 2-3.5, 2-3.5.1, 2-3.6 to  2-3.17    of    the 
storage  and handling of gaseous and Liquefied H2 code are added as follows:
2-3 Piping, tubing, and fittings.
2-3.1 Piping, tubing, and fittings, and gasket and thread sealants  shall  be 
suitable for hydrogen service at the  pressures  and  temperatures  involved.
Consideration shall be given to the  thermal  expansion  and  contraction  of 
piping systems  when  exposed  to  temperature  fluctuations  of  ambient  to 
liquefied hydrogen temperatures.
2-3.2 Material specifications  and  thickness  requirements  for  piping  and 
tubing shall conform to ASME B31.3, "Process Piping." Piping  or  tubing  for 
operating temperatures below -20 degrees  Fahrenheit  (-29  degrees  Celsius) 
shall be fabricated from materials meeting the impact  test  requirements  of 
Chapter III of ASME B31.3 when tested at the minimum operating temperature to 
which the piping can be subjected in service.
2-3.2.1 Aluminum shall not be  used  with  liquefied  H2  piping  except  for 
ambient air vaporizers.
2-3.3 Joints in piping and tubing shall  be  made  by  welding,  brazing,  or 
flanged.  Brazing materials shall have a melting point  above  1,000  degrees 
Fahrenheit (538 degrees Celsius).  Flanged connection shall use a gasket that 
is suitable for H2.
2-3.4 Means shall be provided to minimize exposure  of  personnel  to  piping 
operating at low temperatures and to prevent air condensate  from  contacting 
piping,  structural  members,  and  surfaces  not  suitable   for   cryogenic 
temperatures. Insulation shall be of noncombustible  material  and  shall  be 
designed to have a vaportight seal in  the  outer  covering  to  prevent  the 
condensation of air and subsequent oxygen enrichment within  the  insulation.
The insulation material and outside shield also shall be of  adequate  design 
to prevent attrition of the insulation due to normal operating conditions.
2-3.5 Uninsulated piping  and  equipment  that  operate  at  liquid  hydrogen 
temperatures  shall  not  be  installed  above  asphalt  surfaces  or   other 
combustible materials to prevent contact of  oxygen  enriched  liquefied  air 
with such materials. Drip pans may be installed under uninsulated piping  and 
equipment to control drips and vaporize condensed liquefied air.
2-3.5.1 Where  insulation  materials  are  used,  the  insulation  shall   be 
compatible with the equipment with which the insulation is in contact.
2-3.6 A piping system shall be substantially supported and protected  against 
physical damage and excessive stresses arising  from  settlement,  vibration, 
expansion,  or  contraction.   Supports  for  aboveground  piping  shall   be 
constructed of noncombustible material.
2-3.7 Aboveground  piping  systems  shall  be  protected  from  corrosion  in 
compliance with recognized standards.  Underground piping system shall be  in 
compliance with section 5-3.
2-3.8 Aboveground piping systems shall  be  marked  in  accordance  with  the 
following:
  (a) Marking shall include the name of the gas and direction of flow arrow.
  (b) Marking for piping systems shall be provided at the following locations:
  (i) At each critical process control valve.
  (ii) At wall, floor, or ceiling penetrations.
  (iii) At each change in direction.
  (iv) At a  minimum  of  every  20   feet   (6.1   meters)    or    fraction 
thereof throughout the piping run.
2-3.9 Underground piping shall be installed on a bedding of at least 6 inches 
(15.24 centimeters) of well-compacted backfill material.
2-3.10 In areas subject to vehicle traffic,  the  pipe  trench  shall  be  of 
sufficient depth to permit  a  cover  of  not  less  than  18  inches  (45.72 
centimeters) of well compacted backfill material and pavement.
Exception: In paved areas where a minimum of 8 inches (20.32 centimeters)  of 
asphalt paving is used, the depth of the backfill between the topmost tier of 
piping and the paving can be  reduced  to  not  less  than  8  inches  (20.32 
centimeters).
Exception: In paved areas where a minimum of 6 inches (15.24 centimeters)  of 
reinforced concrete paving is used, the depth of backfill between the topmost 
tier of the piping and the paving can be reduced to not less  than  4  inches 
(10.2 centimeters).
2-3.11 In areas not subject to vehicle traffic, the pipe trench shall  be  of 
sufficient depth to permit 6 inches (15.24 centimeters) each of  bedding  and 
cover of well-compacted backfill material.  A greater burial depth  shall  be 
provided when required by the manufacturer's instructions.
2-3.12 Piping within the same trench shall be separated by more than 3  times 
the diameter of the larger adjacent pipe.
2-3.13 Piping to equipment shall  be  provided  with  an  accessible,  manual 
shutoff valve.
2-3.14 Pipe, tubing, fittings, and other piping components shall  be  capable 
of withstanding a hydrostatic test of at least 3  times  the  rated  pressure 
without structural failure as documented by the manufacturer.
2-3.15 Underground liquefied H2 piping shall be vacuum-jacketed.   Unjacketed 
piping shall not be buried and shall exit the container annular  space  above 
grade.
2-3.16 All natural gas piping shall be installed in accordance with R 29.4601 
et seq.
2-3.17 All liquefied petroleum gas piping shall be  installed  in  accordance 
with R 29.4001 et seq.

  History: 2008 AACS.


R 29.7082  Equipment assembly.
  Rule 82. Sections 2-4.1 and 2-4.2  are  reproduced  from  NFPA   50B,   and 
sections 2-4.3 to 2-4.8 of the storage and handling of gaseous and  Liquefied 
H2  code are added as follows:
2-4 Equipment assembly.
2-4.1 Valves, gauges, regulators, and other accessories shall be suitable for 
liquefied hydrogen service and for the pressures and temperatures involved.
2-4.2 Installation of liquefied  hydrogen  systems  shall  be  supervised  by 
personnel  familiar  with  proper  installation  practices  and  with   their 
construction and use.
2-4.3 Aboveground containers, piping, valves, regulating equipment, and other 
accessories shall be  readily  accessible  and  shall  be  protected  against 
physical damage and against tampering.
2-4.4 An automatic emergency shutoff valve shall be located in liquid product 
withdrawal lines as close to the container as practical.
2-4.5 The automatic shutoff valve shall be provided with a remotely  located, 
manually activated, shutdown control.
2-4.6 The shutoff valve shall be connected to the storage container by  means 
of welded connections without the use  of  flanges,  or  other  appurtenances 
except that a manual  shutoff  valve  equipped  with  welded  connections  is 
allowed to be installed immediately upstream of the automatic  shutoff  valve 
to allow for maintenance of the automatic valve.
2-4.7 Connections downstream of the shutoff valve shall be in accordance with 
ASME B31.3, "Process Piping," adopted by reference in section 8.
2-4.8 Cabinets  or  enclosures  containing  H2  control  equipment  shall  be 
ventilated to prevent any accumulations of H2 gas.

  History: 2008 AACS.


R 29.7083  Testing.
  Rule 83. Sections 2-5 and 2-5.1 are  reproduced  from   NFPA    50B,    and 
section 2-5.2 of the storage and handling of gaseous and Liquefied  H2   code 
is  added as follows:
2-5 Testing.
2-5.1 After installation, all field-erected piping shall be tested and proved 
hydrogen gas-tight at operating pressure and temperature.
2-5.2 Containers, if out-of-service in excess of 1 year, shall  be  inspected 
and tested as outlined in 2-5.1. The pressure relief devices shall be checked 
to determine if they are operable, properly  set,  and  within  test  service 
dates as per section 2-2.15.

  History: 2008 AACS.


R 29.7084  Liquefied H2 vaporizers.
  Rule 84. Sections 2-6.1 to 2-6.4  are  reproduced  from  NFPA   50B,    and 
sections 2-6.5 to 2-6.13 of the storage and handling of gaseous and Liquefied 
H2  code are added as follows:
2-6 Liquefied H2 vaporizers.
2-6.1 The vaporizer shall be anchored and  its  connecting  piping  shall  be 
sufficiently flexible to provide for the effect of expansion and  contraction 
due to temperature changes.
2-6.2 The vaporizer and its piping shall be protected  on  the  hydrogen  and 
heating media sections with pressure relief devices.
2-6.3 Heat used  in  a  liquefied  hydrogen  vaporizer  shall  be  indirectly 
supplied utilizing media such as air, steam, water, or water solutions.
2-6.4 A low-temperature shutoff switch or valve  shall  be  provided  in  the 
vaporizer discharge piping to prevent flow of liquefied hydrogen in the event 
of the loss of the heat source.
2-6.5 Vaporizers shall be designed for a working pressure at least  equal  to 
the maximum discharge pressure of the pump or  the  pressurized  system  that 
supplies them, whichever is greater.
2-6.6 The  discharge  valve  of  each  vaporizer,  if  provided,  its  piping 
components, the relief valves installed upstream of the discharge valve,  the 
vaporizer piping, and related components shall be suitable for operation at a 
liquefied  H2   temperature   of                               -423   degrees 
Fahrenheit (217.2 degrees Celsius).
2-6.7 Multiple vaporizers shall  be  manifolded  such  that  both  inlet  and 
discharge block valves are installed on each vaporizer.
2-6.8 A low temperature switch or other accepted means shall be installed  on 
the vaporizer discharge to eliminate the possibility of cryogenic H2 entering 
gaseous H2 containers and other  equipment  not  designed  for  cryogenic  H2 
temperatures.
2-6.9 Relief valves on heated vaporizers shall be located so  that  they  are 
not subjected to temperatures exceeding 140 degrees  Fahrenheit  (60  degrees 
Celsius) during normal operation unless they are designed to withstand higher 
temperatures.
2-6.10 The combustion air required  for  the  operation  of  integral  heated 
vaporizers or the primary heat source for remote heated vaporizers  shall  be 
taken from outside an enclosed structure or building.
2-6.11 Installation of internal combustion  engines  or  gas  turbines  shall 
conform to R 29.5101 et seq.
2-6.12 Securing of vaporizers.   Vaporizers,  heat  exchangers,  and  similar 
equipment shall be secured to foundations, and their connecting piping  shall 
be flexible to provide for the effects of expansion and  contraction  due  to 
temperature changes.
2-6.13 Vaporizers and heaters  shall  be  provided  with  instrumentation  to 
monitor outlet temperatures.
Exception: Ambient pressure-building coil vaporizers that are fed with liquid 
from, and return vapor to, a container.

  History: 2008 AACS.


R 29.7085  Electrical systems.
  Rule 85. Sections 2-7 to 2-7.2 of the storage and  handling   of    gaseous 
and Liquefied H2 code are added as follows:
2-7 Electrical systems.
2-7.1 Electrical equipment and wiring shall be  specified  and  installed  in 
accordance with NFPA 70, "National Electrical Code," adopted by reference  in 
section 8.
2-7.2 Static protection shall be required when liquefied H2  cargo  transport 
vehicles are loaded or unloaded.  This can be achieved when  cargo  transport 
vehicles or marine equipment are  loaded  or  unloaded  by  grounding  cable, 
conductive hose, flexible metallic tubing, or  pipe  connections  where  both 
halves of metallic couplings are in contact.

  History: 2008 AACS.


R 29.7086  Bonding and grounding.
  Rule 86. Section 2-8 is reproduced from NFPA 50B as follows:
2-8 Bonding and grounding.  The liquefied hydrogen container  and  associated 
piping shall be electrically bonded and grounded.

  History: 2008 AACS.


R 29.7087  Approval.
  Rule 87. Sections 2-9 and 2-9.1 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
2-9 Approval.
2-9.1 Systems  and  all  system  components  shall  be  listed  or  approved, 
including, but not limited to all of the following:
  (a) A container.
  (b) A pressure relief device, including a pressure relief valve.
  (c) A pressure gauge.
  (d) A pressure regulator.
  (e) A valve.
  (f) A vaporizer.
  (g) A hose and hose connection.
  (h) A vehicle fueling connection.
  (i) Electrical equipment related to the H2 system.
  (j) A dispenser.
  (k) Emergency shutoff valves.
  (l) Metal hydride storage.
  (m) Gas detection equipment and alarms.
  (n) H2 generators.
  (o) Pumps or compressors.
  (p) Stationary engine fuel system.

  History: 2008 AACS.


R 29.7088  Pressure gauges.
  Rule 88. Sections 2-10 to 2-10.2 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
2-10 Pressure gauges.
2-10.1 A pressure gauge, if provided, shall be capable of  reading  at  least 
1.2 times the system MAWP.
2-10.2 Pressure gauges  shall  be  installed  on  each  pump  and  compressor 
discharge.

  History: 2008 AACS.


R 29.7089  Pressure regulators.
  Rule 89. Sections 2-11 to 2-11.3 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
2-11 Pressure regulators.
2-11.1 A pressure regulator inlet and each chamber shall be designed for  its 
service pressure with a safety factor of at least 3.
2-11.2 Pressure chambers shall provide for overpressure relief, if required.
2-11.3 Regulators shall be designed, installed, or protected  so  that  their 
operation is not affected by freezing rain, sleet, snow, ice,  mud,  insects, 
or debris.  Regulator protection shall be permitted to be integral  with  the 
regulator.

  History: 2008 AACS.


R 29.7090  Valves.
  Rule 90. Sections 2-12 to 2-12.2 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
2-12 Valves.
2-12.1 Shutoff valves shall have a rated service pressure not less  than  the 
rated service  pressure  of  the  entire  system  and  shall  be  capable  of 
withstanding a hydrostatic test  of  at  least  3  times  the  rated  service 
pressure without rupture.
2-12.1.1 Leakage shall not occur when tested at least  1.1  times  the  rated 
service pressure, using an inert gas compatible with industry practices.
2-12.2 Valves of a design that allows the valve stem to  be  removed  without 
removal of the complete valve bonnet or without disassembly of the valve body 
shall not be used.

  History: 2008 AACS.


R 29.7091  Hose and hose connections.
  Rule 91. Sections 2-13 to 2-13.6 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
2-13 Hose and hose connections.
2-13.1 Hose shall  be  constructed  of  or  lined  with  materials  that  are 
resistant to corrosion and compatible with H2.
2-13.2  Hose,  metallic  hose,  flexible  metal  hose,  tubing,   and   their 
connections shall be designed for the most severe pressures and  temperatures 
expected under normal operating conditions with a burst pressure of at  least 
3 times the service pressure.
2-13.3 Prior to use, hose assemblies shall be tested by the  manufacturer  or 
its designated representative at a pressure at least 1.1  times  the  service 
pressure.
2-13.4 Hose and metallic hose shall be distinctly marked by the  manufacturer 
either by the manufacturer's permanently attached tag or by distinct markings 
indicating  the  manufacturer's  name  or   trademark,   applicable   service 
identifier and design pressure.
2-13.5 The use of hose in an installation shall be limited to the following:
  (a) Vehicle fueling hose.
  (b) Inlet connection to compression equipment.
  (c) Section of metallic hose not exceeding 36 inches (1 meter)  in   length 
in the pipeline to provide flexibility where necessary.
  (d) Transfer hoses for connecting the mobile  supply   equipment    to    a 
local storage system.
2-13.6 Each section shall be  so  installed  that  it  is  protected  against 
mechanical damage and is readily visible for inspection.

  History: 2008 AACS.


R 29.7092  Vehicle fueling connection.
  Rule 92. Sections 2-14 to 2-14.2 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
2-14 Vehicle fueling connection.
2-14.1 Fueling receptacles and nozzles for liquefied H2 service shall  be  in 
accordance with a standard acceptable to the department  based  on  the  best 
interest of public health, safety, and welfare, and the environment.
2-14.2 The use of adapters shall be prohibited.

  History: 2008 AACS.


R 29.7093  Stationary pumps and compressors.
  Rule 93. Sections 2-15 to 2-15.5 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
2-15 Stationary pumps and compressors.
2-15.1 Valves shall be installed such that each pump  or  compressor  can  be 
isolated  for  maintenance.   Where  pumps  or  centrifugal  compressors  are 
installed for operation in parallel, each discharge line  shall  be  equipped 
with a check valve to prevent the backflow of liquid from  1  system  to  the 
other.
2-15.2 Foundations for cryogenic pumps or compressors shall be  designed  and 
constructed to prevent frost heaving.
2-15.3 Operation of all pumps and compressors shall cease when the facility's 
emergency shutdown device (ESD) system is initiated.
2-15.4 Each pump shall be provided with an adequate vent or relief valve that 
will prevent over pressurizing of  the  pump  case  under  normal  conditions 
including the maximum possible rate of cool down.
2-15.5 Vents shall be piped outside of buildings to a point of safe discharge.

  History: 2008 AACS.


R 29.7094  Liquefied H2 to gaseous H2 systems.
  Rule 94. Sections 2-16 to 2-16.4 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
2-16 Liquefied H2 to gaseous H2 systems.
2-16.1 Section 2-16 shall apply to the  design,  construction,  installation, 
and operation of equipment used to produce gaseous H2 from liquefied H2.
2-16.2 Gaseous H2 storage containers  and  equipment  located  downstream  of 
liquefied H2 containers are  not  regulated  by  section  2-16.   Gaseous  H2 
storage containers and equipment shall comply with part 2 of these rules.
2-16.3 In addition to the emergency shutdown  systems  described  in  section 
7-6, the emergency shutdown system shall also shut off the liquid supply  and 
power to the liquefied H2 transfer equipment necessary for producing  gaseous 
H2 from liquefied H2.
2-16.4 Transfer piping,  pumps,  and  compressors  shall  be  protected  from 
vehicle collision damage and shall comply with section 2-1.5.

  History: 2008 AACS.


R 29.7095  Temporary installations.
  Rule 95. Sections 2-17 and 2-17.1 of the storage and handling  of   gaseous 
and Liquefied H2 code are added as follows:
2-17 Temporary installations.
2-17.1 ASME or  U.S.  DOT  containers  that  are  used  as  portable  storage 
containers,  see  definition  of  portable  container  in  section  1-5,  for 
temporary, less than 6 months at any given location, stationary service shall 
comply with the following:
  (a) If mounted on legs or supports, then such supports shall be  of   steel 
and either shall be welded to the container by the manufacturer at  the  time
 of fabrication or shall be attached to lugs that have  been  so  welded   to 
the container.  The legs or supports or the lugs for the attachment of  these 
legs or supports shall be secured to the container  in  accordance  with  the 
code  or rule under which the container was designed and built, to  withstand
 loading in any direction equal to  twice   the   weight   of    the    empty 
container  and attachments.
  (b) If the container is mounted on a trailer or semitrailer  running   gear 
so that the unit can be moved by  a  conventional   over-the-road    tractor, 
then attachment to the vehicle, or attachments to  the  container   to   make 
it  a vehicle, shall comply with the appropriate U.S. DOT  requirements   for 
cargo tank service.  The unit also shall comply  with  applicable  state  and 
U.S.  DOT motor carrier regulations and shall be approved by the department.

  History: 2008 AACS.


R 29.7096  Indoor fueling.
  Rule 96. Section 2-18 of the storage and handling of gaseous and  Liquefied 
H2 code is added as follows:
2-18 Indoor fueling.  Indoor fueling of liquefied H2 is not permitted  unless 
department approved.

  History: 2008 AACS.


               Chapter 3 Location of liquefied hydrogen systems


R 29.7097  General requirements.
  Rule 97. Sections 3-1.1 and 3-1.3 to 3-1.5 are reproduced from  NFPA   50B, 
and sections 3-1.2, 3-1.6 to 3-1.13 of the storage and handling  of   gaseous 
and Liquefied H2 code is added as follows:
3-1 General requirements.
3-1.1 The storage containers shall  be  located  so  that  they  are  readily 
accessible to mobile supply equipment  at  ground  level  and  to  authorized 
personnel. Roadways or other means of access for emergency equipment, such as 
fire department apparatus, shall be provided.
3-1.2 Systems shall not be located beneath or where exposed by failure of the 
following:
  (a) Electric power lines as follows:
  (i) Not less than 50 feet (15.2 meters) horizontally  from   the   vertical 
plane below the nearest overhead wire of an electric trolley, train,  or  bus 
line.
  (ii) Not less than 5 feet (1.5 meters) horizontally  from   the    vertical 
plane below the nearest overhead electrical wire.
  (b) Piping containing all classes of flammable and   combustible    liquids
  (c) Piping containing  oxidizing  materials 3-1.3   Where    a    liquefied 
hydrogen container is installed  on  ground  that  is level with   or   lower 
than  the adjacent storage of all classes of flammable and combustible liquid 
or liquid oxygen, suitable protective  means  shall  be  taken   to   prevent 
accumulation  of liquids within 50 ft  (15.2   m)    of     the     liquefied 
hydrogen  container.
Protective means shall include diking,  diversion  curbs, or grading  of  the 
flammable and combustible liquid storage or  liquid  oxygen storage.
3-1.4 Storage sites shall  be  fenced  and  posted  to  prevent  entrance  by 
unauthorized personnel.  Sites also shall be placarded as follows:
LIQUEFIED HYDROGEN FLAMMABLE GAS  NO  SMOKING  -  NO  OPEN  FLAMES 3-1.5   If 
liquefied hydrogen is located (as specified in  table  3-2.1)  in  a separate 
building, in a special room, or inside  buildings  where  not  in  a  special 
room or  exposed  to   other   occupancies,   containers   shall   have   the 
pressure relief devices vented unobstructed to  the  outdoors  at  a  minimum 
elevation of 25 ft (7.6 m) above grade to a  safe  location  as  required  in 
2-2.3.
3-1.6 Underground systems shall be located underground, mounded, or partially 
buried and outside of any buildings.  Buildings shall not be constructed over 
any underground, mounded, or partially buried container.  Sides  of  adjacent 
containers shall be separated by not less than 3 feet (1 meter).
  (a) Excavation for underground, mounded,  or  partially  buried  containers 
shall be made with due care to  avoid  damage  to  an   existing    structure 
or  its foundation.  Containers shall not be  installed  where   loads   from 
adjacent structures may be transmitted to  the  container.   A  structure  or 
foundation of a structure on the same property  shall  not  be   erected   or 
constructed  within 10 feet (3.1 meters) of any  point  on   the    container 
surface,  unless  the footings extend to the bottom of  the   container.    A 
container  shall  not  be installed less than 10 feet  (3.1   meters)    from 
the  nearest  wall  of  any basement, pit, or property line.
3-1.7 All  underground  containers  shall  be  set  on  firm  foundation  and 
surrounded with 6 inches (15.24 centimeters) minimum  of  noncorrosive  inert 
material such as clean sand or pea gravel.
3-1.8 Underground or mounded containers shall be covered with not less than 2 
feet (60.96 centimeters) of earth  or  with  not  less  than  1  foot  (30.48 
centimeters) of earth on top of which shall be placed a  reinforced  concrete 
slab not less than 4 inches (10.16 centimeters)  thick.   If  containers  are 
likely to be subjected to traffic, they shall  be  protected  against  damage 
from vehicles passing over them by at least 3 feet (1 meter) of  earth  cover 
plus 6 inches (15.24 centimeters) of reinforced  concrete.   When  reinforced 
concrete paving is used as part of the protection, it shall extend at least 1 
foot (30.48 centimeters) horizontally beyond the outline of the container  in 
all directions.
  (a) The  vertical  extension  of   the   vacuum   jacket    required    for 
service connections shall be allowed to extend above grade.
3-1.9 Containers installed in an area subject to flooding, high water  table, 
or other buoyant forces shall be safeguarded from movement  by  anchoring  or 
other means acceptable to the department  based  on  the  best  interests  of 
public health, safety, and welfare and the environment.
3-1.10 Where a liquefied H2 container is installed on ground  that  is  level 
with or lower than the adjacent storage  of  all  classes  of  flammable  and 
combustible liquid or liquid oxygen, suitable protective means shall be taken 
to prevent accumulation of liquids  within  50  feet  (15.2  meters)  of  the 
liquefied H2 container.  Protective means  shall  include  diking,  diversion 
curbs, or grading of the flammable and combustible liquid storage  or  liquid 
oxygen storage.
3-1.11 Aboveground liquefied H2 systems shall be fenced and posted to prevent 
entrance by unauthorized personnel.
Exception:  Liquefied H2 dispensers may be located outside the fence.
3-1.12 Underground  installations  shall  be  deemed  to  provide  engineered 
protection from overhead power lines.
3-1.13 Venting of underground containers.  Venting  systems  for  underground 
storage containers  shall  be  in  accordance  with  CGA  G-5.5,  adopted  by 
reference in section 8. 

  History: 2008 AACS.


R 29.7098  Specific requirements.
  Rule 98. Sections 3-2.1, 3-2.4 and table 3-2.1 are reproduced   from   NFPA 
50B, and sections  3-2.2, 3-2.2.1, 3-2.3, 3-2.5 to 3-2.8 and table  3-2.2  of
 the storage and handling of gaseous and  Liquefied  H2  code  are  added  as 
follows:
3-2 Specific requirements.
3-2.1 The location of  liquefied  hydrogen  storage,  as  determined  by  the 
maximum total quantity of liquefied  hydrogen,  shall  be  in  the  order  of 
preference indicated by the Roman numerals in table 3-2.1.

Table 3-2.1 Preferred Locations of Liquefied Hydrogen Systems

  

    

    

    
    Nature    of 
Location
    

    

    
    Size  of  Hydrogen 
Storage
  
  

    

    

    
    39.63   gal   to 
50 gal (150 
    L to 189.25 L)
    

    

    
    51   gal   to 
300 gal 
    
    

    
    (193.03 L  to  1135.5 
L)
    

    

    
    301   gal   to 
600 gal
    
    

    
    (1139.29  L  to  2271 
L)
    

    

    
    In   excess   of 
600 gal
    
    

    
    (2271 L)

  
  

    

    

    
    Outdoors   

    
    

    

    
    I
    

    

    
    I
    

    

    
    I
    

    

    
    I
  
  

    

    

    
      In a  separate 
building
    
    

    

    
    II
    

    

    
    II
    

    

    
    II
    

    

    
    Not  permitted

  
  

    

    

    
      In  a  special 
room
    
    

    

    
    III
    

    

    
    III
    

    

    
    Not  permitted

    

    

    
    Not  permitted

  
  

    

    

    
    Inside 
buildings
    

    
       Not  in  a 
special room 
    or exposed to other occupancies
    

    

    
    IV
    

    

    
    Not  permitted

    

    

    
    Not  permitted

    

    

    
    Not  permitted

  

3-2.2 The minimum distance in feet from liquefied  H2  systems  of  indicated 
storage capacity located either outdoors, in a separate  building,  or  in  a 
special room to any specified exposure shall  be  in  accordance  with  table 
3-2.2.
Exception: The distances in numbers 1, 4, 6, 7, 8, and 11 in table 3-2.2  may 
be reduced by 2/3, but not to less than 5 feet (1.5  meters),  for  insulated 
portions of the  systems.   For  uninsulated  portions  of  the  system,  the 
distances may be reduced by the use of protective structures having a minimum 
fire resistance rating of 2 hours.  The protective structure or the insulated 
liquefied H2 container shall interrupt the line of sight between  uninsulated 
portions of the liquefied H2 storage system and the exposure.
  (a) An aboveground H2 storage container system shall   be    erected    per 
table 3-2.2 but not less than 75 feet (22.9 meters) from any of the following:
  (i) A school.
  (ii) A church.
  (iii) A hospital.
  (iv) A theater.
  (v) Assembly occupancy for 50 or more persons.
Exception: The restrictions  in  section  3-2.2(a)  shall  not  apply  to  an 
aboveground H2 system used exclusively for stationary power generation.
3-2.2.1   Loose or piled combustible materials and weeds and long dried grass 
shall not be permitted within 10 feet (3.1 meters) of any system.

Table 3-2.2 Minimum Distance from Liquefied Hydrogen Systems to Exposures

  

    

    

    
     

    

    
    Type    of 
Exposure
    

    

    
    Total   Liquefied 

    H2   
Storage
  
  

    

    

    
    39.63  gal  to  3,500 
gal 
    (ft)
    

    

    
    3,501 gal  to  15,000 
gal 
    (ft)
    

    

    
    15,001   gal   to 
75,000 gal
    
    

    
    (ft)

  
  

    

    

    
    1.  Building   or 
structure
    
    

    
        (a) 
Wall(s) adjacent 
    to system constructed  of  non‑combustible  or  limited-combustible 
materials
    

    
    
      (1)Sprinklered 
    building or structure or unsprinklered building or structure having 
    noncombustible contents
    

    

    
     

    

    
     

    

    
    5a

    

    

    
     

    

    
     

    

    
    5a

    

    

    
     

    

    
     

    

    
    5a

  
  

    

    

    
    
      (2) Unsprinklered 
    building or structure with combustible contents.  
    

    
    
         Adjacent wall(s) 
    with fire resistance rating less  than  3  hoursb

    

    

    
    25
    

    

    
    50
    

    

    
    75
  
  

    

    

    
    
         Adjacent wall(s) 
    with fire resistance  rating  of  3  hours  or  greaterb

    

    

    
    5
    

    

    
    5
    

    

    
    5
  
  

    

    

    
        (b) 
Wall(s) adjacent 
    to system constructed of combustible materials
    

    
    
      (1) Sprinklered 
    building or structure
    

    

    
     

    

    
    50
    

    

    
     

    

    
    50
    

    

    
     

    

    
    50
  
  

    

    

    
    
      (2) Unsprinklered 
    building or structure
    

    

    
    50
    

    

    
    75
    

    

    
    100
  
  

    

    

    
    2.    Wall 
openings
    

    
        (a) 
Openable
    

    

    
     

    

    
    75
    

    

    
     

    

    
    75
    

    

    
     

    

    
    75
  
  

    

    

    
        (b) 
Unopenable
    

    

    
    25
    

    

    
    50
    

    

    
    50
  
  

    

    

    
    3. Air compressor 
    intakes   or   inlets   for   air‑conditioning    or    ventilating 
equipment
    

    

    
    75
    

    

    
    75
    

    

    
    75
  
  

    

    

    
    4. All classes of 
    flammable and combustible liquid containers (above ground,  and  vent  or 
fill 
    openings  if  below  ground)  (see 
3-1.3)c
    

    

    
    50
    

    

    
    75
    

    

    
    100
  
  

    

    

    
    5. Between stationary 
    liquefied H2 containers
    

    

    
    5
    

    

    
    5
    

    

    
    5
  
  

    

    

    
    6.  Flammable  gas 
storage 
    other than H2
    

    

    
    50
    

    

    
    75
    

    

    
    75
  
  

    

    

    
    7.  Liquid  oxygen 
storage 
    and    other    oxidizers     
(see 3‑1.3)
    

    

    
    75
    

    

    
    75
    

    

    
    75
  
  

    

    

    
    8.   Combustible 
solids
    

    

    
    50
    

    

    
    75
    

    

    
    100
  
  

    

    

    
    9. Open flames and 
    welding
    

    

    
    50
    

    

    
    50
    

    

    
    50
  
  

    

    

    
    10. Places of public 
    assembly for 50 or more persons
    

    

    
    75
    

    

    
    75
    

    

    
    75
  
  

    

    

    
    11. Public ways, 
    railroads, and property lines
    

    

    
    25
    

    

    
    50
    

    

    
    75
  
  

    

    

    
    12.   Inlet   to 
underground 
    sewers
    

    

    
    10
    

    

    
    10
    

    

    
    10
  
  

    

    

    13. Places of public 
    assembly less than 50 people
    

    

    
    25
    

    

    
    50
    

    

    
    50
  
  

    

    

    14. 
    Flammable/Combustible liquid  dispenser  other  than  H2

    

    

    
    10
    

    

    
    10
    

    

    
    10
  
  

    

    

    
    For SI units: 1 ft = 
    0.305 m; 1 gal = 3.785 L.
    

    
    a  Portions  of  wall 
less 
    than 10 ft (3 m) (measured horizontally) from any part of a system shall 
    have a fire resistance rating of at least 1/2 hour.
    

    
    b  Exclusive   of 
windows 
    and doors.
    

    
    c Distances can be 
    reduced to 15 ft (4.6 m) for class IIIB combustible liquids.

  

3-2.3 Cargo transport unloading.  Unloading connections on delivery equipment 
shall not be positioned closer to any of the exposures cited in  table  3-2.2 
than the distances given for the storage system.  The following shall apply:
  (a) For  stationary  container   system   installations    or    stationary 
multiple container systems utilizing a common or manifolded transfer line, or 
railroad tank car transfer systems to fill trucks with no stationary  storage 
involved shall comply with all of the following:
  (i) Owners and operators shall ensure that fixed piping is  used    between 
the container and master shutoff and  check   valves.    The    piping    and 
manifolds shall be secured to  the  container  frame.   Flexible  hoses   are 
permitted between the check valve and the cargo vehicle unloading connection.
Exception:  Bulkheads will be  located  at  a  minimum  of  1.5  feet  (45.72 
centimeters) when crash protection is provided at 10 feet (3.1  meters)  from 
storage container.
  (ii) Emergency shutoff valves  required  in   this   section    shall    be 
tested annually for proper operation.  The results  of  the  tests  shall  be 
documented.
  (iii) All installations shall have at least  1  clearly   identified    and 
easily accessible manually operated remote emergency shutoff device.   Within 
1  year after the effective date of these rules, existing installations shall 
have at least 1 clearly identified and easily  accessible  manually  operated
 remote emergency shutoff device.  The  emergency  shutoff  device  shall  be 
located  not less than 20 feet (6.1 meters) nor more than  100   feet   (30.5 
meters)  in  the path of egress from the emergency shutoff  valve   and   not 
less  than  20  feet (6.1 meters) from the container system.
  (iv) During transfer of H2 to  and  from  cargo  vehicles,  the   hand   or 
emergency brake of the vehicle shall be set, and chock blocks shall  be  used 
to  prevent rolling of the vehicle.
  (v)  Transfer   systems   shall   be   capable   of    depressurizing    to 
facilitate disconnection.  Bleed connections shall lead to a  safe  point  of 
discharge.
  (vi) Cargo vehicle shall be equipped with air-brake interlock in  front  of 
the unloading connection to protect against drive-away.
  (b) The delivery vehicle shall be located so  that  all  parts    of    the 
vehicle are on the premises when delivery is made, and shall comply with  all 
of  the following:
  (i) Vent connections shall be provided so that loading arms and  hoses  can 
be depressurized  and  vented  prior  to  disconnection   if   necessary.
The connections for liquefied H2 shall be  piped  to  a   vent    stack    in 
accordance with part 2, section 2-2.2.
  (ii) When transfers  are  made  into  fueling  facility   containers,   the 
liquefied  H2  shall  be  transferred  at  a  pressure   that    shall    not 
over-pressurize  the receiving container.
  (iii) The transfer piping shall be equipped  with  a   check    valve    to 
prevent backflow from the container being filled to  the  transport  vehicle.
  Check valve shall be located as close as practicable to the container.
  (iv) If the fueling facility container or transfer equipment is located  in 
a remote  area  relative  to  the  delivery    vehicle    operating    status 
indicators, that  is   those   that   indicate   container    level,    these 
container   status indicators shall be provided in the unloading area.
  (v) At least 1 qualified person shall be in  continuous   attendance    and 
shall have an unobstructed view  of  the  transfer  point   while   unloading 
is  in progress.
  (vi) Sources of ignition shall not be permitted in  the   unloading    area 
while transfer is in progress.
  (vii) The cargo transport vehicle's  engine  shall  be  shut   off    while 
the transfer hose or piping is being connected or disconnected.  If  required 
for liquefied H2 trailer pumping transfer, the engine pump  drive  motor  may
 be started and used during the liquid transfer operations.
3-2.4 The minimum distance of container fill connections from parked vehicles 
shall be 25 ft (7.6 m).
3-2.5 An owner and  operator  shall  ensure  that  a  container  systems  are 
properly designed and constructed in accordance with the ASME  and  that  any 
portion,  which  is  underground,  mounded,  or  partially  underground,   is 
protected from corrosion by either of the following:
  (a) The ASME approved container system is cathodically protected  by    all 
the following requirements:
  (i) The ASME  approved  container  system  is  coated  with   a    suitable 
dielectric material approved by the department.
  (ii) Factory-installed or field-installed  cathodic   protection    systems 
are designed by a corrosion  expert  or  in  accordance   with    the    NACE 
recommended practice RP0285 entitled  "Corrosion  Control   of    Underground 
Storage  Tank Systems by Cathodic Protection" or  impressed  current  systems 
are designed  to allow a determination of  current  operating    status    as 
required  in  section 5.4-1 of the H2 code.
  (iii)  Cathodic  protection  systems  are  operated  and   maintained    in 
accordance with the provisions of section 5.4-1 of the H2 code.
  (b) Other methods as approved by the department and in the  best   interest 
of public health, safety, and welfare, and the environment.
3-2.6 Out-of-service aboveground containers.
3-2.6.1 Containers that are no longer in service for a period  of  12  months 
shall be closed.  To close the aboveground container, the owner  or  operator 
shall empty the container, purge it  with  an  inert  gas  and  safeguard  it 
against tampering.  Piping that is removed from service shall be purged  with 
an inert gas and capped or removed.
3-2.6.2 Each container that is to be reused at the original location or a new 
location shall be purged with an inert gas and be in compliance with all  the 
requirements  for  the  installation  of  a  new  container,  and  shall   be 
recertified by the manufacturer, or authorized representative, and tested  in 
accordance with the container's design specifications or be  pressure  tested 
with an inert gas or H2 at 1.1 times the MOP for not less  than  10  minutes.
Piping that is to be reused shall be in compliance with all the  requirements 
for the installation of new piping and shall be  tested  in  compliance  with 
section 3-2.8 of this code prior to being brought back into service.
3-2.7 Out-of-service underground, mounded, and partially buried containers.
3-2.7.1 Containers that are no longer used to store H2 and are  not  intended 
to be brought back into service shall be permanently closed.  To  permanently 
close the container, the container shall be emptied and purged with an  inert 
gas to render the container free of H2,  and  then  the  container  shall  be 
removed from the ground.  When  a  structure  above  or  near  the  container 
prevents removal, the container shall be emptied and purged with an inert gas 
to render the container free of H2, then the container shall be  filled  with 
an inert solid material.  Piping that is  permanently  removed  from  service 
shall be purged with an inert gas and capped or removed.
3-2.7.2 Containers may be rendered temporarily out-of-service only when it is 
intended they be brought back into service at a later date.   To  temporarily 
close a container, all of the following requirements shall be met:
  (a) The container shall be emptied and purged with an inert gas.
  (b) Corrosion protection for the container and  all   underground    piping 
shall be maintained in compliance with section 5-4.1 of this code.
  (c) The vent line shall remain functional.
  (d) The container shall be secured against tampering.
  (e) Piping that is temporarily removed from service shall be  purged   with 
an inert gas and capped.
3-2.7.2.1 Each container that is temporarily out-of-service greater  than  12 
months shall be pressure tested with an inert gas at 1.1 times  the  MOP  for 
not less than  10  minutes  prior  to  being  brought  back  into  service.
Temporarily out-of-service piping shall be tested in compliance with  section 
3-2.8 of this code prior to being brought back into service.
3-2.8 Testing.  After installation, prior to being placed into  service,  all 
container connections, piping, tubing, hose, and  hose  assemblies  shall  be 
tested by an approved method as outlined  in  ASME  B31.3  "Process  Piping," 
adopted by reference  in  section  8,  or  by  a  method  acceptable  to  the 
department based on the best interest of public health, safety, and  welfare, 
and the environment.

  History: 2008 AACS.


R 29.7099  Handling of liquefied H2  inside  buildings  other  than  separate 
buildings and special rooms.
  Rule 99. Sections 3-3 and 3-3.1 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
3-3 Handling of liquefied H2 inside buildings other than  separate  buildings 
and special rooms.
3-3.1 Portable liquefied H2 containers of  50-gallons  (189-Liters)  or  less 
capacity as permitted in Table 3-2.1 and in  compliance  with  section  3-1.5 
where housed inside buildings not located in a special room  and  exposed  to 
other occupancies shall comply with the following minimum requirements.
  (a) Containers shall be located 20 feet (6.1  meters)  from   all   classes 
of flammable and combustible liquids and readily combustible materials   such 
as excelsior or paper.
  (b) Containers  shall  be  located  15  feet  (4.6  meters)  from  ordinary 
electrical equipment, and 25 feet (7.6  meters)  from  open  flames,  welding
 or  other sources on ignition.
  (c) Containers shall be  located  50  feet  (15  meters)  from  storage  of 
oxidizing gases.
  (d) Containers shall be protected against  damage  or   injury    due    to 
falling objects or work activity in the area.
  (e) Containers shall be firmly secured and stored in an  upright   position 
and protected against damage in accordance with  the  provisions  of  section 
2-1.7.
  (f) Pressure relief devices   on   the   containers   shall    be    vented 
directly outdoors or to a hood that is suitable for flammable and combustible 
vapors.

  History: 2008 AACS.


R 29.7100  Location of dispensing operations and equipment.
  Rule 100. Sections 3-4 to 3-4.4 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
3-4 Location of dispensing operations and equipment.
3-4.1 Dispensing equipment located outdoors shall be in accordance  with  the 
following:
  (a) Dispensing  equipment  shall  be  allowed  under   weather   protection 
in accordance with the requirements of section 4-5 and  constructed   in    a 
manner that prevents the accumulation of H2 gas.
3-4.2 Dispensing equipment shall not be beneath electric power lines or where 
exposed by their failure, and shall be a minimum of 10 feet (3.1 meters) from 
the nearest important building or property line or 20 feet (6.2 meters)  from 
any activity that involves a fixed source of ignition.
3-4.3 Dispensing equipment shall be located so that all parts of the  vehicle 
being served are on the premises of the motor fuel dispensing facility.
3-4.4 Dispensing equipment shall be protected  against  collision  damage  by 
means acceptable to the department.  Dispensing  devices  shall  be  securely 
bolted in place.  Dispensing devices shall be installed  in  accordance  with 
manufacturer's instructions.

  History: 2008 AACS.


R 29.7101  Installation of emergency shutdown equipment.
  Rule 101. Sections 3-5 to 3-5.2 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
3-5 Installation of emergency shutdown equipment.
3-5.1 Breakaway protection shall be provided in a  manner  such  that,  if  a 
pullaway event occurs, liquefied H2 will cease to flow at any separation.
3-5.2 A breakaway device shall be installed at every dispensing point.   Such 
a device shall be arranged to separate by a force not greater than 150 pounds 
(75 kilograms), when applied in any direction that the vehicle would  move.
Breakaway devices shall be compatible  with  a  standard  acceptable  to  the 
department.

  History: 2008 AACS.


             Chapter 4 Design considerations at specific locations


R 29.7102  Outdoor locations.
  Rule 102. Sections 4-1 to 4-1.4 are reproduced from NFPA 50B as follows:
4-1 Outdoor locations.
4-1.1 Roadways and yard surfaces located below liquefied hydrogen  piping  as 
well as areas under the fill connections and delivery  vehicle's  uninsulated 
hydrogen piping from which liquid  air  can  drip  shall  be  constructed  of 
noncombustible materials. For the purposes of this  standard,  asphaltic  and 
bitumastic paving shall be considered combustible. If  expansion  joints  are 
used, fillers also shall be of noncombustible materials.
4-1.2 If walls, roofs, weather shelters, or canopies are provided, they shall 
be constructed of noncombustible or limited-combustible materials.
4-1.3 Electrical wiring and equipment shall comply with section 2-7.
4-1.4 Lighting shall be provided for nighttime transfer operation.

  History: 2008 AACS.


R 29.7103  Specific requirements.
  Rule 103. Sections 4-2 to 4-2.2.3 of the storage and handling  of   gaseous 
and Liquefied H2 code are added as follows:
4-2 Specific requirements.
4-2.1 The location of liquefied H2 storage,  as  determined  by  the  maximum 
total quantity of liquefied H2, shall be in accordance with table 3-2.1.
4-2.2 Installation of liquefied  H2  inside  buildings  other  than  detached 
buildings and gas rooms.
4-2.2.1 More than 1 system of 50 gallons (189.5 liters) or less capacity  may 
be installed in the same room or area outside of  special  rooms  located  as 
allowed in table 3-2.1 and in compliance with  section  4-2.1,  provided  the 
systems are separated by at least 50 feet (50.2 meters) or by a  full  height 
fire-resistive partition having a minimum fire resistance rating of  2  hours 
is located between the systems.
4-2.2.2 The separation distance between multiple systems of 50 gallons (189.5 
liters) or less may be reduced to 25 feet (7.6 meters) in buildings where the 
space between storage areas is free of combustible  materials  and  protected 
with a sprinkler system.
4-2.2.3 When sprinkler protection is provided, the area in which  the  H2  is 
stored or used shall be protected with a sprinkler system designed to be  not 
less than that required by NFPA 13 for extra hazard group 1  with  a  minimum 
design area of 2,500 square feet (762 square meters).

  History: 2008 AACS.


R 29.7104  Separate buildings.
  Rule 104. Sections 4-3 to 4-3.5 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
4-3 Separate buildings.
4-3.1 Separate buildings containing more than 300 gallons  (1137  liters)  of 
liquefied H2 shall be constructed of  noncombustible  or  limited-combustible 
materials on a substantial frame.  Walls and roofs shall be lightly fastened.
All venting elements shall be designed to relieve at a maximum  pressure   of 
25 pounds/square foot.  Doors shall be located in such a manner that they are 
readily accessible to personnel in an emergency.
Exception: Window glazing may be of plastic.
Exception: Explosion venting shall be in accordance with section 4-4.3.
4-3.2 Ventilation to the outdoors shall be provided.  Inlet openings shall be 
located within 18 inches (45.72 centimeters) of the floor in  exterior  walls 
only.  Outlet openings shall be located at the high  point  of  the  room  in 
exterior walls or roof.  Both the inlet and outlet vent openings shall have a 
minimum total area of 1 square foot/1000 cubic foot  (0.3  square  meters/305 
cubic meters) of room  volume.   Discharge  from  outlet  openings  shall  be 
directed or conducted to a  location  that  allows  for  dissipation  of  the 
exhaust air in the ambient surroundings away from air  intakes  and  occupied 
spaces.
4-3.3 There shall be no sources of ignition within the room or area where the 
H2 system is installed.
4-3.4 Electrical wiring and equipment shall comply with section 2-7.
Exception: All electrical wiring and equipment in the separate building shall 
be class I, division 2, group B.
4-3.5 Heating, if provided, shall be by indirect means such as steam  or  hot 
water.
Exception: Electrical heating shall be in accordance with section 4-3.4.

  History: 2008 AACS.


R 29.7105  Special rooms.
  Rule 105. Sections 4-4 to  4-4.9.1,  and  table  4-4.9  of   the    storage 
and handling of gaseous and Liquefied H2 code are added as follows:
4-4 Special rooms.
4-4.1 Floors, walls, and ceiling shall be constructed  of  noncombustible  or 
limited-combustible materials.  Interior walls or  partitions  shall  have  a 
fire resistance rating of at least 2 hours, shall be continuous from floor to 
ceiling, and shall be securely  anchored.   At  least  1  wall  shall  be  an 
exterior wall.  Windows and doors shall  be  located  so  as  to  be  readily 
accessible in case of emergency.
Exception: Window glazing may be of plastic.
4-4.1.1 Access from within the primary structure  shall  be  made  through  1 
vapor-sealing, 2 hour, self-closing fire door.
4-4.2 Ventilation shall be provided as in section 4-4.3.
4-4.3 Deflagration venting shall be provided in exterior walls or roof only.
4-4.3.1 Vents shall be any 1 or any combination of the following:
  (a) Walls of light material.
  (b) Lightly fastened hatch covers.
  (c) Lightly fastened, outward opening doors in exterior walls.
  (d) Lightly fastened walls or roof.
  (e) Other methods in accordance with  NFPA  69,  adopted  by  reference  in 
section 8.
4-4.3.2 Where applicable, snow loads shall be considered.
4-4.3.3 The venting area shall be equal to not  less  than  1  cubic  foot/30 
cubic feet (1 cubic meter/9 cubic meters) of room volume.
4-4.4 There shall be no sources of ignition.
4-4.5 Electrical wiring and equipment shall comply with section  2-7,  except 
that all electrical wiring and equipment in the special room shall  be  class 
I, division 2, group B.
4-4.6 Heating, if provided, shall be by steam, hot water, or  other  indirect 
means.
Exception: Electrical heating shall be in accordance with section 4-4.5.
4-4.7 Room ventilation.
4-4.7.1 The ventilation shall be at least 1 cubic foot/minute/square foot  of 
room area, but not less than 1 cubic foot/minute/12 cubic feet of room volume 
and shall be designed such that an accumulation  of  H2  at  a  concentration 
equal to or greater than 25% of the lower flammable limit shall not occur  in 
any part of the room.
4-4.7.2 Ventilation shall be by a continuous mechanical ventilation system or 
by a mechanical ventilation system activated by a continuously monitoring  H2 
detection system where a gas concentration of not more than 25% of the  lower 
flammable limit is present.
4-4.7.3 Where installed, a gas detection system shall be equipped to sound an 
alarm and visually indicate when a maximum of  25%  of  the  lower  flammable 
limit is reached.
4-4.7.4 Any failure of the ventilation system shall immediately shut down the 
fueling system and provide notification to the system operator.  Reactivation 
of the fueling system shall be by manual restart and shall  be  conducted  by 
trained personnel.
4-4.7.5 The gas detection system shall  function  during  ventilation  system 
maintenance operations.
4-4.7.6 A ventilation system  for  a  room  within  or  attached  to  another 
building shall  be  designed  to  ensure  that  all  areas  serviced  by  the 
ventilation  system  meeting  performance  requirements  in  accordance  with 
section 4-4.7  during  the  normal  operating  conditions  and  during  alarm 
conditions.
4-4.8 Warning signs.
4-4.8.1 Access doors shall have warning signs with the words  "WARNING  -  NO 
SMOKING - NONORDORIZED FLAMMABLE GAS -  CRYOGENIC LIQUID - COLD GAS - NO OPEN 
FLAMES."  The wording shall be in plainly legible,  bright  red  letters  not 
less than 1 inch (2.54 centimeters) high on a white background.
4-4.9 Indoor attended gaseous H2 fast-fill fueling.
4-4.9.1  Attended indoor fast-fill fueling system shall be in accordance with 
subsections (a) to (k) of this section.
  (a) Gas storage equipment shall be located outdoors unless   approved    by 
the department.  Gas processing and compression  equipment  shall  be  listed
 or approved for indoor use or located outdoors.
  (b) An emergency  manual  shutdown  device  shall  be  located    in    the 
dispensing area not less than 20 feet (6.1 meters) and not  more   than   100 
feet  (30.5 meters) in the path  of  egress  from  the  dispensing   area.
Actuation   of   the  emergency  manual  shutdown  device  shall  perform  in 
accordance with  subsection (h) of this section.
  (c) The dispenser shall be equipped with a gas  detection   system    which 
shall actuate in accordance with subsection (h)  of  this  section   when   a 
maximum  of 25% of LFL is detected (1% H2 in air).
  (d) The dispenser shall be equipped with a leak detection  system   capable 
of identifying a leak from the dispensing  system  outside   the    dispenser 
housing by conducting a pre-fill pressure test.  The leak detection must   be 
capable  of  detecting  a  minimum  leak  rate  of  1.9  gallon/minute   (7.2 
liter/minute)  and shall actuate in accordance with subsection  (h)  of  this 
section when  a  leak is detected.
  (e)  Whether  the  fill  is   communicated   or    non-communicated,    the 
dispensing system must be listed, labeled or approved  to  insure  that   the 
fills  are protective of the safety of the  temperature,  pressure  and  flow 
rate limits of the on-board fuel system during fueling.
  (f) The dispensing area shall be equipped with a fire   detection    system 
and shall actuate in accordance with subsection (i) of this section if a fire
 is detected.
  (g) A ventilation system shall be installed for  the  dispensing   area.
The ventilation system shall be capable  of  delivering  ventilation  air  as 
provided in section 4.3.7.  The ventilation system shall operate   prior   to 
dispenser operation, during fueling, and for at least 1 minute after  fueling 
has  been completed.  The  ventilation  flow  rate  shall  be   monitored.
Failure  or reduction of the ventilation flow rate below the  required   flow 
rate  shall shut down the dispensing system.
Exemption: A dispensing area ventilation system is not required when the fuel 
delivery per refueling event is less than those listed in table 4-4.9.

Table 4-4.9

  

    

    

    
    Room Size  (m3)

    

    

    
    Maximum fuel delivery 
    per refueling event that does not  require  room  ventilation  (kg)

  
  

    

    

    
    1000

    

    

    
    0.8
  
  

    

    

    
    2000

    

    

    
    1.7
  
  

    

    

    
    3000

    

    

    
    2.5
  
  

    

    

    
    4000

    

    

    
    3.3
  
  

    

    

    
    5000

    

    

    
    4.2
  

  (h) The actuation of any 1 of the systems listed in subsections (b) to  (g) 
of this section shall shut down the dispenser, stop the flow  of   gas   into 
the room, and start or continue to run the ventilation system,  if  required,
 it shall be in accordance with table 4-4.9.
  (1) Reactivation of the dispenser and gas flow into  the  room   shall   be 
by manual restart and shall be conducted by trained personnel.
  (i) Interior walls, doors, and window openings within 15 feet (4.6  meters) 
of the dispenser shall be constructed of materials having a fire  rating   of 
at least 2 hours.   Wall  penetrations  shall   require   use    of    listed 
fire-rated equipment.
  (j) The owner/operator shall not allow hot work/open flames    within    15 
feet (4.6 meters) of the refueling location unless the  dispenser   is   shut 
down, depressurized, and purged.
  (k) If H2 is to be removed from the  vehicle  storage  system,   H2   shall 
be discharged into a  closed  transfer  system  or   vented    outdoors    in 
accordance with CGA G-5.5, "Hydrogen Vent Systems," as adopted  by  reference 
in section 8.

  History: 2008 AACS.


R 29.7106  Canopies.
  Rule 106. Sections 4-5 to 4-5.2 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
4-5 Canopies.
4-5.1 A container installation that has a canopy or  roof  shall  have  prior 
approval by the department based on the  best  interests  of  public  health, 
safety, and welfare and the environment.  This canopy or roof shall not limit 
the dissipation of heat or dispersion of flammable vapors and cannot restrict 
firefighting access and control.
4-5.2 A roof or canopy shall meet all of the following conditions:
  (a) The lowest elevation of the roof or canopy shall not be less   than   4 
feet (1.8 meters) from the top of the container.
  (b) All container vent(s) are extended through the roof or canopy.
  (c) The roof or canopy is constructed in such a way that  it    will    not 
allow for vapors to accumulate under the canopy or roof.
  (d) Constructed of non-combustible materials.

  History: 2008 AACS.


R 29.7107  Outdoor fill station.
  Rule 107. Sections 4-6 to 4-6.2 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
4-6 Outdoor fill station.
4-6.1 Each line between a liquid storage facility and a dispenser at  a  fill 
station shall have a valve that closes when 1 of the following occurs:
  (4) The power supply to the dispenser is cut off.
  (5) Any emergency shutdown device at the refueling station is activated.
4-6.2 A manual shutoff valve shall be provided at a fill station upstream  of 
the breakaway device specified in section 3-5, where it is readily accessible 
to the person dispensing H2, unless 1 of the following occurs:
  (a)  The  self-closing  valve  referred   to   in    section    4-6.1    is 
located immediately upstream of the dispenser.
  (b) The dispenser is equipped with a self-closing valve  that  closes  each 
time the dispenser is turned to the off  position  or  when   an    emergency 
device  is activated.
4-6.3 The liquid hydrogen dispenser shall provide a means to safely vent  all 
hydrogen that may become trapped in sections of the dispenser between  closed 
valves in all shut down modes including loss of power.

  History: 2008 AACS.


                           Chapter 5 Operation


R 29.7108  Operation.
  Rule 108. Section 5-1 is reproduced from NFPA  50B,  and   sections   5-1.1 
to 5-1.9 of the storage and handling of gaseous and Liquefied H2   code   are 
added as follows:
5-1 Operation.  For installations that require any operation of equipment  by 
the user, instructions shall be maintained at operating locations.
5-1.1 Where an  overpressure  incident  that  results  in  operation  of  the 
overpressure  protection  system  of  the  dispenser  occurs,  the  dispenser 
pressure control system shall  be  examined  and  certified  by  a  qualified 
operator prior to being returned to service.
5-1.2 Liquefied H2 fueling facilities shall be designed so that, in the event 
of a power failure, the system shall go into fail-safe condition.
5-1.3 The maximum delivery pressure at  the  vehicle  tank  inlet  shall  not 
exceed the maximum allowable pressure of the vehicle fuel tanks.
5-1.4 Hose and arms shall be equipped with a shutoff valve at  the  fuel  end 
and a breakaway device that meets the requirements of section 3-5 to minimize 
release of liquid and vapor in the event that a vehicle pulls away while  the 
hose remains connected.  Such a device shall be installed and  maintained  in 
accordance with the manufacturer's instructions.
5-1.5 When not in use, hose shall be secured to protect it from damage.
5-1.6 Where a hose or arm of nominal 3 inches (7.62 centimeters) diameter  or 
larger is used for liquid transfer or where 1  of  nominal  4  inches  (10.16 
centimeters) diameter or larger is used  for  vapor  transfer,  an  emergency 
shutoff valve shall be installed in the piping of the transfer system  within 
10 feet (3.1 meters) from the nearest end of the hose or arm.
5-1.6.1 Where either a liquid or vapor line has 2 or more legs, an  emergency 
shutoff valve shall be installed either in each leg or in the line before the 
legs.
5-1.7 Bleed or vent connections shall be provided so that  loading  arms  and 
hose can be drained and depressurized prior to disconnection, if necessary.
These bleed or vent connections shall lead to a safe point of discharge.
5-1.8 A fueling connector and mating vehicle receptacle  shall  be  used  for 
reliable, safe, and secure transfer of liquefied or gaseous H2 to or from the 
vehicle with minimal leakage.
5-1.8.1 The fueling connector either shall  be  equipped  with  an  interlock 
device  that  prevents  release  while  the  line  is  open  or  shall   have 
self-closing ends that automatically close upon disconnection.
5-1.9 The transfer  of  liquefied  H2  into  vehicular  onboard  fuel  supply 
containers  shall  be  performed  in  accordance  with   the   manufacturer's 
instructions.  The dispenser manufacturer's instructions shall be  posted  at 
the dispensing device.

  History: 2008 AACS.


R 29.7109  Maintenance.
  Rule 109. Sections 5-2 to 5-2.11 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
5-2 Maintenance.
5-2.1 Hoses, nozzles, and breakaways shall be  examined  visually  to  ensure 
that they are safe for  use  and  shall  be  maintained  in  accordance  with 
manufacturer's instructions on at least a quarterly basis, or if required  by 
the manufacturer.
5-2.2 Hose shall be tested for leaks per manufacturer's requirements, and any 
leakage shall be a reason for rejection and replacement.
5-2.3 Testing shall be carried out with helium or with helium/  H2  blend  as 
the test gas or if this is not possible, with H2 using suitable precautions.
5-2.4 The  facility  operator  shall  maintain  a  maintenance  log  in  good 
condition  and  accessible  to  department  inspection.   Records  shall   be 
maintained for a minimum of 2 years.
5-2.5 Controllers on fuel stations shall be designed to verify the  integrity 
of the fuel hose, breakaway, nozzle, and  receptacle  by  pressurizing  these 
components to at least the vehicle back pressure and checking  pressure  drop 
prior to the start of fueling.
5-2.6 Containers  and  their  appurtenances,  piping   systems,   compression 
equipment, controls, and detection devices shall be maintained  in  operating 
condition and according to manufacturer's instructions.
5-2.7 Pressure relief valves shall be maintained in operating condition.
5-2.8 Maintenance personnel shall be trained in leak detection procedures.
5-2.9 Area within 10 feet (3.1  meters)  of  dispenser  shall  be  free  from 
debris, weeds and other material that present a fire hazard.
5-2.10 Safety, gas detection, and fire protection equipment shall  be  tested 
or inspected at intervals not to exceed 6 months.
5-2.11 Maintenance activities on fire control equipment shall be scheduled so 
that a minimum of equipment is taken out of service at any 1  time  and  fire 
prevention safety is not compromised.

  History: 2008 AACS.


R 29.7110  Cathodic protection maintenance.
  Rule 110. Sections 5-3 and 5-3.1 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
5-3 Cathodic protection maintenance.
5-3.1(a) Owners and  operators  shall  ensure  that  all  metallic  container 
systems that are underground, mounded, or partially underground are protected 
and maintained to minimize corrosion as cited in  the  NACE  standard  RP0169 
entitled "Recommended Practice, Control of External Corrosion of  Underground 
or Submerged Metallic Piping Systems" and NACE  recommended  practice  RP0285 
entitled "Corrosion Control of Underground Storage Tank Systems  by  Cathodic 
Protection,"  adopted by reference in section 8.
  (b) All corrosion protection systems shall  be  operated   and   maintained 
to continuously provide corrosion protection to  the  metal   components   of 
the portion of the ASME approved container system that   routinely   contains 
liquid H2 and that is in contact with the ground.
  (c) All container systems equipped with cathodic protection  systems  shall 
be inspected for proper operation by a  NACE  certified  cathodic  protection 
tester as defined in section 1-3.  The H2 system shall  be  tested  within  6 
months  of installation and at least once each calendar year at intervals not 
to  exceed 15 months.
  (d)  Container  systems  equipped  with    impressed    current    cathodic 
protection systems shall be inspected by the owner every 60  days  to  ensure
 that  the equipment is operating within design specifications.   The  design 
limits shall be readily available.
  (e) If container systems are equipped  with  cathodic   protection,    then 
the owner or operator shall maintain records  to   demonstrate    that    the 
cathodic protection is in compliance with the performance standards  of  this 
section.
The records shall provide both of the following:
  (i) The results of the last 3 inspections required in subsection   (d)   of 
this section.
  (ii) The  results  of  testing  from  the  last  2   inspections   required 
in subsection (c) of this section.
  (f) Within 6  months   following   the   repair   of    any    cathodically 
protected container system, where the repairs may affect the operation of the
 cathodic protection system, the system shall be tested in  accordance   with 
subsections (c) and (d) of this  section  to  ensure  that  it  is  operating 
properly.
  (g) Repairs or  replacement  of  a  cathodic  protection  system  shall  be 
conducted by a NACE certified corrosion expert as  defined  in  section  1-3.
  General system maintenance of the  cathodic  protection  system  including,
 but  not limited to, replacement of fuses, and splicing of cable  would  not 
be required to be designed by a corrosion expert and shall be approved by the
 department to not increase the hazard  to  public  health,    safety,    and 
welfare  and  the environment.

  History: 2008 AACS.


R 29.7111  Stray or impressed currents and bonding.
  Rule 111. Sections 5-4 to 5-4.3 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
5-4 Stray or impressed currents and bonding.
5-4.1 Where stray or impressed  currents  are  used  or  can  be  present  on 
dispensing systems, such  as  cathodic  protection,  protective  measures  to 
prevent ignition shall be taken.
5-4.2 Static protection between the fuel dispenser and the vehicle shall  not 
be required where H2 is transferred by  conductive  hose,  flexible  metallic 
tubing, or pipe connections where both halves of the metallic  couplings  are 
in continuous contact.
5-4.3 The transfer surface shall be concrete or shall have a resistivity  not 
exceeding API RP 2003, "Protection Against Ignitions Arising Out  of  Static, 
Lightning,  and  Stray  Currents,"  adopted  by  reference  in   section   8, 
performance criteria of 1 megohm as measured using a method acceptable to the 
department, such as EN 1081:1998 "Resilient Floor Coverings  -  Determination 
of the Electrical Resistance," adopted by reference in section 8.

  History: 2008 AACS.


R 29.7112  Emergency plan.
  Rule 112. Sections 5-5 to 5-5.1.2 of the storage and handling  of   gaseous 
and Liquefied H2 code are added as follows:
5-5 Emergency plan.
5-5.1 Emergency plan requirements.
5-5.1.1 An emergency plan shall be prepared and updated wherever  gaseous  or 
liquefied H2 are produced, handled, stored, or used.
5-5.1.2 The plan shall be available to the  department  for  inspection  upon 
reasonable notice and shall include all of the following information:
  (a) The type of emergency equipment available and its location.
  (b) A brief description of  any  testing  or  maintenance   programs    for 
the available emergency equipment.
  (c) An indication that hazard identification labeling is    provided    for 
each storage area.
  (d) Location of posted emergency procedures.
  (e) A material safety data sheet (MSDS or equivalent) that  is    available 
for the gaseous or liquefied H2 stored or used on the site.
  (f) A list of personnel or a site operating authority who  are   designated 
and trained to  be  liaison  personnel  for  the  fire  department  and   who 
are responsible for but shall not be limited to the following:
  (i) Aiding the emergency responders in pre-emergency planning.
  (ii) Identifying the location of the gaseous and  liquefied  H2  stored  or 
used.
  (iii) Accessing material safety data sheets.
  (iv) Knowledge of the site emergency procedures.
  (g) A list of types and quantities of gaseous  and  liquefied   H2    found 
within the facility.

  History: 2008 AACS.


R 29.7113  Release of H2.
  Rule 113. Sections 5-6 to 5-6.2 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
5-6 Release of H2.
5-6.1 Records of unexpected discharges.  Accurate records of  the  unexpected 
discharge of gaseous or liquefied H2 shall be kept by the facility  and  made 
readily available upon request.  Records shall be kept for  a  minimum  of  2 
years.
5-6.2 Container  failure.   When  an  unexpected  discharge  due  to  primary 
container failure is discovered the department and the local fire department, 
shall be immediately notified, and the container  shall  be  repaired  or  be 
removed from service.

  History: 2008 AACS.


R 29.7114  Security.
  Rule 114. Sections 5-7 and 5-7.1 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
5-7 Security.
5-7.1 Liquid H2 and compressed gas cylinders, containers, and  systems  shall 
be secured against accidental dislodgement and against access by unauthorized 
personnel.

  History: 2008 AACS.


R 29.7115  Leaks, damage, or corrosion.
  Rule 115. Sections 5-8 and 5-8.1 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
5-8 Leaks, damage, or corrosion.
5-8.1 Leaking, damaged, or corroded, liquid or gaseous H2  systems  shall  be 
removed from service, replaced or repaired.

  History: 2008 AACS.


                           Chapter 6 Fire protection


R 29.7116  Cautionary information.
  Rule 116. Sections 6-1 to 6-1.2 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
6-1 Cautionary information.
6-1.1 Hazard identification  signs  shall  be  conspicuously  placed  at  all 
locations where H2 is produced, stored, used, or handled.
6-1.2 Ratings shall be assigned in accordance with NFPA 704, "Standard System 
for the Identification of the Hazards of Materials for  Emergency  Response," 
adopted by reference in section 8.

  History: 2008 AACS.


R 29.7117  Signs.
  Rule 117. Sections 6-2 to 6-2.3 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
6-2.1 Signs prohibiting smoking or open flames within 25  feet  (7.6  meters) 
shall be provided where H2 is produced, stored, or used.
6-2.2 A sign with the following legends printed in red capital letters  on  a 
white background shall be conspicuously posted as follows:
"NON-ODORIZED FLAMMABLE GAS - CRYOGENIC LIQUID or COLD GAS - NO SMOKING -  NO 
OPEN FLAMES" All lettering on signage shall be 3 inches (7.62 centimeters) or 
more.
Exception: This does not apply  to  motor  vehicle  dispensing  per  sections 
7.2.13 and 4-4.8.1.
6-2.3 Identification signs.  Visible hazard  identification  signs  shall  be 
provided in accordance with NFPA 704, "Standard System for the Identification 
of the Hazards of Materials for Emergency Response", adopted by reference  in 
section 8.1.1, at entrances to buildings or areas in which  liquefied  H2  is 
stored, handled or used.

  History: 2008 AACS.


R 29.7118  Fire extinguisher.
  Rule 118. Section 6-3 of the storage and handling of gaseous and  Liquefied 
H2 code is added as follows:
6-3 A portable fire extinguisher(s) having a rating of not less  than  40-B:C 
or 2-20-B:C shall be located within 75 feet (22.9  meters)  from  the  pumps, 
dispensers,  and  container  fill  openings.   Fire  extinguishers  shall  be 
inspected and maintained according to NFPA 10, "Standard  for  Portable  Fire 
Extinguishers," adopted by reference in section 8-1.1.

  History: 2008 AACS.


R 29.7119  Sprinkler protection.
  Rule 119. Section 6-4 of the storage and handling of gaseous and  Liquefied 
H2 code is added as follows:
6-4 When sprinkler protection is provided, the area in which H2 is stored  or 
used shall be protected with an automatic sprinkler system designed to be not 
less than that required  by  NFPA  13,  "Standard  for  the  Installation  of 
Sprinkler Systems," adopted by reference in section 8.

  History: 2008 AACS.


                    Chapter 7 Liquefied hydrogen dispensing systems


R 29.7120  System component qualification.
  Rule 120. Section 7-1 of the storage and handling of gaseous and  Liquefied 
H2 code is added as follows:
7-1 System component qualification.   System  components  shall  comply  with 
applicable provisions of Chapters 2 and 3 of this part.

  History: 2008 AACS.


R 29.7121  General system requirements.
  Rule 121. Sections 7-2 to 7-2.15 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
7-2 General system requirements.
7-2.1 All fuel dispensing  facilities  shall  meet  the  provisions  of  this 
chapter.
7-2.2 Compression, processing, generation, storage, and dispensing  equipment 
shall  be  protected  to  prevent  damage  from  vehicles  and  minimize  the 
possibilities of physical damage and vandalism and meet the  requirements  of 
section 2-1.5 and section 3-4.4.
7-2.2.1 Access to liquefied H2 storage, compression, and processing equipment 
by members of the public shall be restricted by a suitable secure area.
7-2.3 Control devices shall be installed so that internal or  external  icing 
does not cause vehicle or fueling station malfunction.
7-2.4 Vehicles shall not be considered a source of ignition with  respect  to 
the provisions of this chapter.
Exception: Vehicles containing fuel-fired  equipment,  such  as  recreational 
vehicles and catering trucks, shall be considered a source of ignition unless 
this equipment is shut off  completely  before  entering  an  area  in  which 
ignition sources are not permitted.
7-2.5 The fueling connection  shall  prevent  the  escape  of  H2  where  the 
connector is not properly engaged or becomes separated.
7-2.6 Fueling nozzles for H2 service shall  be  in  accordance  with  section 
2-14.1.
7-2.7 Compression and processing equipment shall be designed for use with  H2 
and for maximum pressures and temperatures to which it can be subjected under 
normal operating conditions.
7-2.8 Compression and processing equipment shall have pressure relief devices 
that limit each stage pressure to the maximum allowable working pressure  for 
the compression cylinder and piping associated with that stage of compression 
and meets the requirements of chapter 2.
7-2.9 H2 compression equipment shall be equipped with  appropriate  automatic 
shutdown controls.
7-2.10 Control circuits that shut down,  shall  remain  down  until  manually 
activated or reset by qualified personnel.
7-2.11 A hazard analysis shall  be  conducted  on  every  H2  fueling  system 
installation by a qualified engineer(s) with proven expertise in  H2  fueling 
systems and installations.
7-2.11.1 The hazard analysis shall include the  following:   fire  protection 
measures, fire protection and suppression  systems,  detection  systems,  and 
ventilation.
7-2.11.2 At a minimum, the hazard analysis  shall  include  consideration  of 
potential failures in  hoses,  nozzles,  dispensing  equipment,  as  well  as 
failures for maintenance and service.
7-2.11.3 Method used for hazard analysis shall be 1 or combination of several 
of the  following  recognized  procedures:  hazard  and  operability  studies 
(HAZOPs), failure mode effects and criticality analysis (FMECA),  preliminary 
hazards analysis (PHA), fault tree analysis (FTA)  and  event  tree  analysis 
(ETA).  Other analysis methods, when used, shall ensure same level of  system 
safety as provided by any of the recognized procedures or acceptable  to  the 
department based on the best interest of public health, safety, and  welfare, 
and the environment.
7-2.11.4 Standard designs that have been  analyzed  by  recognized  procedure 
need  not  be  studied  each  and  every  time  such  installation  occurs.
Site-specific elements that are unique to the installation shall be  reviewed 
in concert with the analysis performed on the standard system to ensure  that 
the standard design has not been altered  in  a  way  that  would  negatively 
affect the hazard analysis.
7-2.11.5 These hazard  analyses  shall  be  available  for  review  at  final 
inspection, prior to the installation being placed  into  service,  shall  be 
maintained on site, and be available to the department upon request.
7-2.12 Dispensing systems shall be equipped with overfill protection.
7-2.13 Warning signs shall be conspicuously posted in the dispensing area and 
shall incorporate the following  or  equivalent  wording:   "Stop  Motor,  No 
Smoking, Non-Odorized Flammable Gas, Cryogenic Liquid or Cold Gas.  Remain in 
attendance outside of the vehicle and in view of the nozzle.  No  filling  of 
portable containers in or  on  a  motor  vehicle."  7-2.14   Each   outdoor   
H2-dispensing device shall be located not less  than  10  feet  (3.1  meters) 
from  property   lines,   openings   to   buildings,    and  buildings   of   
combustible  wall construction.  A dispensing  device  shall not  be   less   
than  20   feet   (6.1  meters)  from  any   activity    that  involves   a   
fixed  source  of  ignition.
In addition, a dispenser shall not be placed beneath a power line.
7-2.15 Each container filling location that is open to the public shall  have 
an attendant or supervisor on duty who meets the requirements of section  1-8 
of the rules.

  History: 2008 AACS.
 

R 29.7122  Operational requirements for full-service liquefied H2 motor  fuel 
dispensing facilities.
  Rule 122. Sections 7-3 to 7-3.2 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
7-3 Operational  requirements  for  full-service  liquefied  H2  motor   fuel 
dispensing facilities.
7-3.1 Each  motor  fuel  dispensing  facility  shall  have  an  attendant  or 
supervisor on duty whenever the facility is open for business.  The attendant 
or supervisor shall dispense liquefied H2 into fuel tanks of  motor  vehicles 
or into portable containers.
7-3.2 The provisions of section 2-1 of  this  part  shall  not  prohibit  the 
temporary use of  a  portable  storage  container  in  conjunction  with  the 
dispensing of liquefied H2 into a container  of  a  motor  vehicle  or  other 
motorized equipment which is on the premises and which is not  accessible  to 
the public.  A portable storage container installation  shall  only  be  made 
with the approval of the department and comply with all the  requirements  of 
section 2-13.

  History: 2008 AACS.


R 29.7123  Operational requirements  for  attended  self-service  motor  fuel 
dispensing facilities.
  Rule 123. Sections 7-4 to 7-4.5 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
7-4 Operating requirements for attended self-service  motor  fuel  dispensing 
facilities.
7-4.1 Self-service motor fuel dispensing facility shall mean that portion  of 
a property where liquefied H2 used as motor fuel is stored and dispensed from 
fixed, approved dispensing  equipment  into  the  fuel  containers  of  motor 
vehicles by persons other than the facility attendant and shall also include, 
where provided, facilities for sale of other retail products.
7-4.2 There shall be not less than 1 attendant on duty while the self-service 
facility is open for business.  The attendant's primary function shall be  to 
supervise, observe, and control the dispensing  of  liquefied  H2  while  the 
liquefied H2 is actually being dispensed.
7-4.3 The responsibility of the attendant shall be as follows:
  (a) Prevent the dispensing of liquefied H2 into portable containers  in  or 
on a motor vehicle.
  (b) Control sources of ignition.
  (c) Immediately activate emergency controls and notify the fire  department 
of any fire.
The attendant or supervisor on duty shall be mentally and physically  capable 
of performing the functions and assuming  the  responsibility  prescribed  in 
section 7-4.
7-4.4 Operating instructions shall be conspicuously posted in the  dispensing 
area.
7-4.5 The dispensing area shall  at  all  times  be  in  clear  view  of  the 
attendant, and the placing or allowing of any obstacle to  come  between  the 
dispensing area and the attendant control area is prohibited.   This  may  be 
achieved by cameras or mirrors, or both.  The attendant shall at all times be 
able to communicate with persons in the dispensing area.

  History: 2008 AACS.


R 29.7124  Operational requirements for unattended  self-service  motor  fuel 
dispensing facilities.
  Rule 124. Sections 7-5 to 7-5.5 of the storage and handling   of    gaseous 
and Liquefied H2 code are added as follows:
7-5 Operating requirements for unattended self-service motor fuel  dispensing 
facilities.
7-5.1 Unattended self-service shall be permitted subject to the  approval  of 
the department based on the best interests  of  public  health,  safety,  and 
welfare and the environment.  Users shall use a key, card,  or  other  method 
which is unique to each user, and which is provided by the facility operator, 
and shall be properly trained in  dispensing  operations.   The  owner  shall 
verify such training to the department upon request.
7-5.2 At least 1 emergency shutoff device specified in section 7-6  shall  be 
provided, and shall be reset only by the owner or an owner's authorized agent.
7-5.3 Operating instructions shall be conspicuously posted in the  dispensing 
area.  The instructions shall include the location of emergency controls.
7-5.4 In addition to the warning signs specified in  section  6-2,  emergency 
instructions shall be  conspicuously  posted  in  the  dispenser  area.   The 
instructions shall incorporate the following or equivalent wording:
"Emergency Instructions In Case of Fire:
  (1) Use emergency stop button.
  (2) Report  accident  by  calling  the   local   fire    number.     Report 
location." 
7-5.5 A telephone or other approved, clearly identified  means  to 
notify  the fire department shall be provided  on  the  site  in  a  location 
approved  by  the department.

  History: 2008 AACS.


R 29.7125  Emergency shutoff devices.
  Rule 125. Sections 7-6 and 7-6.1 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
7-6 Emergency shutoff devices.
7-6.1 Liquefied H2 dispensing systems  shall  be  provided  with  1  or  more 
clearly identified emergency shutoff devices or electrical disconnects at the 
dispensing area.  Such devices or disconnects shall be installed in  approved 
locations but not less than 10 feet (3.1 meters) and not more than  100  feet 
(30.5 meters) away from the dispensing area and which is along the  means  of 
egress.  Emergency shutoff devices or electrical disconnects shall disconnect 
power and fuel supply to all dispensing devices, to all remote pumps  serving 
the dispensing devices, and to  all  associated  power.   When  more  than  1 
emergency shutoff device or electrical disconnect is  provided,  all  devices 
shall be interconnected.  Resetting an emergency shutoff shall require manual 
intervention and the manner of resetting shall be approved by the department.

  History: 2008 AACS.


R 29.7126  Refueling from transport vehicles.
  Rule 126. Sections 7-7 to 7-7.11 of the storage and handling  of    gaseous 
and Liquefied H2 code are added as follows:
7-7 Refueling from transport vehicles.  The dispensing of liquefied H2 in the 
open from a transport vehicle to  a  motor  vehicle  located  at  commercial, 
industrial, governmental, or manufacturing establishments  and  intended  for 
fueling vehicles used in connection with their businesses shall be  permitted 
if all of the requirements of sections 7-7.1 to 7-7.11 have been met.
7-7.1 The department shall be notified  before  commencing  operations  under 
section 7-7.
7-7.2 The transport vehicle shall comply with U.S. DOT requirements  for  the 
transportation of liquefied H2.
7-7.3 Nighttime deliveries shall only be made in an  area  considered  to  be 
adequately lighted.
7-7.4 The transport vehicle  flasher  lights  shall  be  in  operation  while 
dispensing operations are in progress.
7-7.5 Smoking materials, including matches, lighters, and  other  sources  of 
ignition, including torches, shall not be used within 20 feet (6.1 meters) of 
the dispensing of liquefied H2 in the open from  a  transport  vehicle  to  a 
motor vehicle.
7-7.6 Each area where dispensing of liquefied H2 in the open from a transport 
vehicle to a motor vehicle shall be provided  with  1  or  more  listed  fire 
extinguishers  that  have  a  minimum  capability  of   40-B:C.    The   fire 
extinguishers shall be readily accessible to the dispensing operation.   Fire 
extinguishers shall be inspected and maintained under NFPA 10, "Standard  for 
Portable Fire Extinguishers," adopted by reference in section 8.
7-7.7 Mobile fueling shall take  place  aboveground,  shall  not  be  beneath 
electric power lines or where exposed by their failure, and shall be 10  feet 
(3.1  meters)  from  the  nearest  important  building,  property  lines   or 
combustible storage.
7-7.8 Transport vehicle brakes shall be set and  chock  blocks  shall  be  in 
place.
7-7.9 Persons performing dispensing operations shall be qualified to  deliver 
and dispense H2 fuels.  Operations of  transport  vehicles  used  for  mobile 
fueling operations shall have access  on-site  or  be  in  possession  of  an 
emergency communications device to notify the proper authorities if there  is 
an emergency.
7-7.10 The transport vehicles shall be positioned with  respect  to  vehicles 
being fueled to prevent traffic from  driving  over  the  delivery  hose  and 
between the transport vehicle and motor vehicle being fueled.  The dispensing 
hose shall be  properly  placed  on  an  approved  reel  or  in  an  approved 
compartment before moving the transport vehicle.
7-7.11 The transfer area shall meet the requirements of section 5-4.

  History: 2008 AACS.


                            Chapter 8 Referenced publications


R 29.7127  Referenced publications.
  Rule 127. Sections 8-1 to 8-1.2.9 of the storage and handling  of   gaseous 
and Liquefied H2 code are added as follows:
8-1 The following documents or portions thereof are  referenced  within  this 
standard as mandatory requirements  and  shall  be  considered  part  of  the 
requirements of this standard.  The edition  indicated  for  each  referenced 
mandatory document is the current edition, and cost at time  of  adoption  of 
these rules.  Copies of the adopted publications are available for inspection 
at the office of the Department of Environmental Quality, Waste and Hazardous 
Materials Division, Storage Tank Unit,  P.O.  Box  30241,  Lansing,  Michigan 
48909-7741.
8-1.1 NFPA   Publications.    National   Fire   Protection   Association,   1 
Batterymarch Park, P.O. Box 9101, Quincy, Massachusetts 02269-9101.
NFPA 10, "Standard for Portable Fire Extinguishers," 2002 edition, $36.50.
NFPA 13, "Standard for the Installation of Sprinkler Systems," 2002  edition, 
$70.00.
NFPA 69, "Standard on Explosion Prevention Systems," 2002 edition, $33.50.
NFPA 70, "National Electrical Code," 2005 edition, $75.00.
NFPA 220, "Standard on Types of Building Construction," 1999 edition, $28.00.
NFPA 704, "Standard System for the Identification of the Hazards of Materials 
for Emergency Response," 2001 edition, $33.50.
8-1.2 Other Publications.
8-1.2.1 ASME Publications.  American Society of Mechanical  Engineers,  Three 
Park Avenue, New York, New York 10016-5990.
ANSI/ASME B31.3, "Process Piping," 2004 edition, $240.00.
ASME International, "Boiler and Pressure Vessel  Code,"  Section  VIII,  2004 
edition, $525.00.
8-1.2.2 ASTM Publication.  American Society for Testing  and  Materials,  100 
Barr Harbor Drive, West Conshohocken, Pennsylvania 19428-2959.
ASTM E136-04, "Standard Test Methods for Behavior of Materials in a  Vertical 
Tube Furnace at 750 Degrees C," 2004 edition, $35.00.
8-1.2.3 CGA Publications.  Compressed Gas Association, 1725  Jefferson  Davis 
Highway, Arlington Virginia 22202-4100.
CGA S-1.1, "Pressure Relief  Device  Standards  -  Part  1  -  Cylinders  for 
Compressed Gases," 2002 edition, $196.00.
CGA S-1.2, "Pressure Relief Device Standards - Part 2 -  Cargo  and  Portable 
Tanks for Compressed Gases," 1995 edition, $145.00.
CGA S-1.3, "Pressure Relief Device Standards - Part 3  -  Stationary  Storage 
Containers for Compressed Gases," 2003 edition, $145.00.
CGA G-5.5, "Hydrogen Vent Systems," 2004 edition, $39.00.
ANSI/CGA C-4, "Method  of  Marking  Portable  Compressed  Gas  Containers  to 
Identify the Material Contained," 2003 edition, $252.00.
CGA C-7, "Guide to the Preparation of Precautionary Labeling and  Marking  of 
Compressed Gas Containers," 2000 edition, $268.00.
8-1.2.4 IAS  Publications.   International  Approval  Services,   8501   East 
Pleasant Valley Road, Cleveland, Ohio 44131.
ANSI/IAS NGV 4.4, "Breakaway Devices for Dispensing Systems,"  1999  edition, 
$57.00.
8-1.2.5 NACE  Publications.   National  Association  of  Corrosion  Engineers 
International, 1440 South Creek Drive, Houston, Texas 77084.
NACE RP0169, "Control of  External  Corrosion  of  Underground  or  Submerged 
Metallic Piping Systems," 2002 edition, $42.00.
NACE RP0285, "Corrosion  Control  of  Underground  Storage  Tank  Systems  by 
Cathodic Protection," 2002 edition, $37.00.
8-1.2.6 International Codes Council.  4051 West Flossmore Road, Country  Club 
Hills, Illinois 60478-5795.
"International Fire Code," 2006 edition, section 2209.3.2.6, $61.50.
8-1.2.7 U.S.  Government  Publications.   U.S.  Government  Printing  Office, 
Washington, DC 20402.
Title 49, Code of Federal Regulations,  Parts  171-190,  U.S.  Department  of 
Transportation Specifications and Regulations.
8-1.2.8 ECS Publications.  European Committee  for  Standardization,  Central 
Secretariat: rue de Stassart 36, B-1050, Brussels.
EN  1081,  "Resilient  Floor  Coverings,  Determination  of  the   Electrical 
Resistance," 1998 edition, $32.00.
8-1.2.9 API Publications.   American  Petroleum  Institute,  1220  L  Street, 
Northwest, Washington, DC, 20005-5-4070.
API Recommended Practice 2003, "Protection Against Ignitions Arising  Out  of 
Static, Lightning, and Stray Currents," 7th edition, $111.00.

  History: 2008 AACS.