DEPARTMENT OF STATE POLICE

                            STATE FIRE SAFETY BOARD

               COMPRESSED NATURAL GAS (CNG) VEHICULAR FUEL SYSTEMS

(By authority conferred on the state fire safety board by section 3c  of  Act 
No. 207 of the Public Acts of 1941, as amended, being S29.3c of the  Michigan 
Compiled Laws)

                     PART 1.  GENERAL PROVISIONS

R 29.4601   Applicability.
  Rule 1.  These rules apply to the design and  installation  of  CNG  engine 
fuel systems on vehicles and associated fuel-dispensing systems.   A   person 
shall comply with these rules and with other applicable state   and   federal 
statutes and rules and regulations promulgated under the statutes.

  History: 1995 AACS.


R 29.4602   Compressed natural gas (CNG) vehicular fuel  systems;    adoption 
of standard by reference.
  Rule 2.  The national fire protection  association   pamphlet    no.    52, 
1992 edition, entitled "Standard for Compressed Natural Gas (CNG)   Vehicular 
Fuel Systems," referred to in   these   rules   as   "the    standard,"    is 
adopted  by reference as part of  these  rules.   Copies  of   the    adopted 
standard  are available for inspection and distribution either at the  office 
of  the  State Fire Safety Board, Michigan Department of  State  Police  Fire 
Marshal Division, General Services Unit, 7150 Harris Drive, Lansing, Michigan
48913,   or   from  the  National  Fire   Protection    Association,     One 
Batterymarch   Park,    Quincy,   Massachusetts   02269,   telephone   number 
1-800-344-3555.  The  cost  as  of  the time of adoption of  these  rules  is 
$19.50 per copy.

  History: 1995 AACS.


                 PART 2.  AMENDMENTS TO THE STANDARD FOR
           COMPRESSED NATURAL GAS (CNG) VEHICULAR FUEL SYSTEMS

R 29.4621   Scope.
  Rule 21.  Section 1-1 of the standard is amended to read as follows:
  1-1.   The  standard  applies  to  the   design   and    installation    of 
compressed natural gas (CNG) engine fuel systems on vehicles  of  all  types,
including aftermarket and OEM's, and to all fuel-dispensing stations.
Exception:  Vehicles which are  in  compliance  with  federal  motor  vehicle 
safety standards covering the installation of CNG fuel  systems  on  vehicles 
and which  are  certified  by  the  vehicle  manufacturer  as  meeting  these 
standards do not need to be in compliance with section 2-8.4 of the  standard 
and chapter 3, engine fuel systems, except for section 3-11 of the  standard, 
labeling.

  History: 1995 AACS.


R 29.4622   Alternate provisions.
  Rule 22.  Section 1-2 of the standard is amended to read as follows:
  1-2.  It is recognized that advancement in technology   and    improvements 
in system design and equipment may result in equipment  operating   practices 
that differ from those specifically called  for  in  the   standard.     Such 
deviations or  improvements  may  provide  desirable  safety  and  compatible 
operation meeting the intent of the  standard.   A  person  may   request   a 
variation  to  the application of a  rule  by  applying  to  the  state  fire 
marshal and  including  a satisfactory explanation of why compliance  is  not 
possible or why alternative technology provides an equivalent level  of  fire
safety.   The  state  fire marshal may make a variation  upon  finding  that 
the variation does not  result in an increased hazard to life,  property,  or 
the environment.  The state fire marshal shall transmit the findings  to  the 
person who requested the variation within 45 days of receipt of the variation 
request by the state fire  marshal and shall  enter  the  findings  into  the 
records of the state fire marshal.

  History: 1995 AACS.


R 29.4623   Definitions.
  Rule  23.   Section  1-5  of  the  standard  is  amended  by  amending  the 
definitions  of  "approved,"  "authority    having    jurisdiction,"    "bulk 
storage,"  "cascade storage system," "dispensing  station,"   "fuel    supply 
container,"  "labeled," "listed," "pressure relief  device:"  by  adding  the 
definitions of "natural gas vehicle (NGV) or  vehicle,"  "original  equipment 
manufacturer  (OEM),"  "rack," "state  fire  marshal,"  "system   or   system 
components,"  "vehicle  fueling appliance;" and by deleting  the  definitions 
of "shall" and "should"  to  read as follows:
"Approved" means acceptable to the state fire  marshal  unless   specifically 
indicated otherwise in the rules.
"Authority having jurisdiction" means  the  fire  marshal  division  of   the 
department of state police or a local unit of government delegated  authority 
under Act No. 207 of the Public Acts of 1941, as amended, being S29.1 et seq.
of the Michigan Compiled Laws.
"Bulk storage" means a single container or containers  manifolded   together, 
where all containers draw down at the same rate.
"Cascade 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 banks may consist of 
1 or more containers.
"Dispensing station" means a natural gas  installation  that  dispenses   CNG 
either from a storage container or containers or from a distribution pipeline 
by means of a compressor or pressure booster into fuel supply containers on a 
vehicle or into portable cylinders.
"Fuel supply container" means a container which is or may be mounted upon   a 
vehicle to store CNG as the fuel supply to the internal combustion engine  of 
the vehicle.
"Labeled" means equipment or materials that have an attached  label,  symbol, 
or other identifying mark of an organization which is acceptable to the state 
fire marshal, which is concerned with product evaluation, and which maintains 
periodic inspection of the production of labeled equipment or materials.  The 
label, symbol, or mark of the organization indicates that the manufacturer is 
in compliance with appropriate standards or performance in a specified manner.
"Listed" means equipment or materials included in a  list  published  by   an 
organization which  is  acceptable  to  the  state  fire  marshal,  which  is 
concerned with product evaluation, and which maintains periodic inspection of 
the production of listed equipment or materials, and the listing shall  state 
either that the equipment or material meets appropriate standards or has been 
tested and found suitable for use in a specified manner.
"Natural gas vehicle (NGV) 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  or  used 
exclusively on stationary rails or tracks; and which has  the  capability  to 
use natural gas as an engine fuel.
"Original equipment manufacturer (OEM)" means an  original  equipment   motor 
vehicle manufacturer that certifies that the motor vehicle is  in  compliance 
with applicable federal motor vehicle safety standards.
"Pressure relief device" means a pressure  or  temperature-activated   device 
used to prevent pressure  from  rising  above  a  predetermined  maximum  and 
thereby prevent the rupture of  a  normally  charged  pressure  vessel  or  a 
cylinder when subjected to a standard fire test  as  required  by  49  C.F.R.
S173.34(d),(1989), or S73.34(d) of the transport commission  of  Canada  (TC) 
regulations.   Pressure  relief  devices  for  United  States  department  of 
transportation (DOT) or TC cylinders shall also include  devices  capable  of 
protecting partially charged cylinders when subjected to the fire tests.
"Rack" means a mounting system used to secure the CNG fuel supply   container 
or containers to a vehicle.
"Shall" deleted.
"Should" deleted.
"State fire marshal" means the Michigan department  of  state  police,   fire 
marshal division.
"System  or  system  components"  means  natural  gas  containers,   pressure 
boosters, compressors, and all attached valves, piping, and appurtenances.
"Vehicle-fueling appliance" means a self-contained listed assembly used   for 
the compression and delivery of  natural  gas  into  vehicles  including  the 
associated equipment and piping of the appliance.

  History: 1995 AACS.


R 29.4624   Prohibitions.
  Rule 24.  Sections 1-6, 1-6.1, 1-6.2, 1-6.3, 1-6.4, and 1-6.5  are    added 
to the standard to read as follows;
  1-6.  Prohibitions.
  1-6.1.   Any  CNG-dispensing  station  or  practice  that   is    not    in 
compliance with these rules shall be considered to be in violation  of  these 
rules.
  1-6.2.  Upon notification by  the  authority   having    jurisdiction,    a 
person shall not deliver CNG into any dispensing station if the  station   is 
not  in compliance with these rules.  Such  notification  may    include    a 
verbal  or written communication or an affixed written  notification  on  the 
CNG system.
  1-6.3.  A person  shall   not   tamper   with,   remove,    or    disregard 
written notification affixed to the CNG system.
  1-6.4.   An  owner  or  operator  shall  not   continue    to     use     a 
CNG-dispensing station that is a fire hazard.
  1-6.5.  If construction of the storage system is  not  commenced  within  1 
year after the date of  approval,  an  installation  application   shall   be 
resubmitted in accordance with this section.   Fees  required    under    the 
act  shall  be submitted with the resubmitted application.

  History: 1995 AACS.


R 29.4625   Installation application.
  Rule 25.  Sections 1-7, 1-7.1, 1-7.2, 1-7.3, 1-7.4,  1-7.5,    and    1-7.6 
are added to the standard to read as follows:
  1-7.  Installation application.
  1-7.1.  An application shall be submitted by the owner   to    the    state 
fire marshal before the installation of a dispensing station or  an  addition 
to  an existing dispensing station, except for a dispensing   station    that 
does  not have storage, which may include a residential fueling facility or a 
 vehicle fueling appliance.
  1-7.2.   The  installation  application  shall   include   all    of    the 
following information:
  (a)  A plot map showing all of the following:
  (i)  The location of all of the following:
  (A)  Buildings.
  (B)  Public roadways.
  (C)  Railroad mainlines.
  (D)  Public sidewalks.
  (E)  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 or combustible liquids.
  (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     or 
combustible liquids.
  (b)  The construction material, the dimensions  and   the    capacity    of 
each container.
  (c)  The type of container venting and pressure relief.
  (d)  The compressor size (psig and scfm) of each container.
  (e)  Container appurtenances.
  (f)  A  piping  diagram  showing  sizes,  valves,  pressure   relief    and 
fittings, and control devices.
  (g)  The water vapor control device, mechanism, or procedure.
  1-7.3.  Upon acknowledged receipt of the  plans,  the  state  fire  marshal 
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.
  1-7.4.   Upon  completion   of   the    installation,     the     authority 
having jurisdiction shall be notified not  less  than   7    calendar    days 
before  the installation  is  placed  in  service.   The   authority   having 
jurisdiction  shall inspect the installation  following  the    receipt    of 
notification  and  shall certify the  installation  if  the  requirements  of 
these rules have been  met.
If the inspection is not made  within  2  working  days  of  the  receipt  of 
notification, excluding Saturdays, Sundays, and holidays, the owner may place 
the installation in service and a notarized affidavit shall be  submitted  by 
the owner to the authority having jurisdiction attesting to the fact that the 
installation is in compliance with the plans submitted and applicable rules.
  1-7.5.  Upon the owner's request, all  plans  and    specifications    that 
are submitted to the state fire marshal for review shall be  returned   after 
the authority having jurisdiction has certified the  installation  or  within
 30 working days after the notification to the authority having  jurisdiction
 of the completion of the installation.  Plans and specifications   may    be 
marked "Confidential -- Do Not Copy" at the time they are submitted.
  1-7.6.  The requirements in these sections do  not  relieve  the  owner  of 
legal responsibility for complying with applicable local ordinances.

  History: 1995 AACS.


R 29.4626   Installation application fees and annual certification fees.
  Rule 26.  Sections 1-8, 1-8.1, and 1-8.2 are added to  the   standard    to 
read as follows:
  1-8.  Installation application fees and annual certification fees.
  1-8.1.   Only  an  owner  of  a  CNG-dispensing  station   for   which   an 
installation application is required to be submitted under section   1-7   of 
the  standard shall be required to pay fees as specified in section 5 of  Act 
No. 207 of the Public Acts of 1941, as amended, being S29.5 of  the  Michigan 
Compiled Laws.
  1-8.2.  For the purpose  of  assessing  fees,  each  18,500   scf   storage 
capacity of CNG or increment thereof shall be considered a tank, as  used  in 
section  5 of Act No. 207, of the Public Acts of 1941,  as   amended,   being 
S29.5  of  the Michigan Compiled Laws.

  History: 1995 AACS.


R 29.4627   Personnel.
  Rule 27.  Sections 1-9 and 1-9.1 are  added  to  the  standard   to    read 
as follows:
  1-9.  Personnel.
  1-9.1.  In  the   interest   of   safety,   all   persons    involved    in 
handling compressed natural gas shall be trained in the proper  handling  and 
operating procedures and only those individuals so trained are  permitted  to
 install, operate, or service compressed natural gas systems and equipment.
Exception:  This training is not required for a person transferring CNG at an 
attended self-serve facility.

  History: 1995 AACS.


R 29.4628   Gas quality.
  Rule 28.  Section 2-2 of  the   standard   is   amended,    and    sections 
2-2.1, 2-2.1.1, 2-2.2 and 2-2.3 are added to the standard, to read as follows:
  2-2.  Gas quality  in  the  container  shall  be  in  compliance  with  the 
following specifications:

H2S and soluble sulfides partial pressure....0.05 psi. max.
Water vapor                              ....7.0 lb./MMCF, max.
CO2 partial pressure                  ....7 psi. max.
O2                                    ....0.5 volume %, max.

Exception:  When the dew point of the gas entering the container is below the 
lowest anticipated container temperature at the maximum anticipated container 
pressure, the specifications of this section do not apply.
NOTE:  For additional information on gas quality see  Society  of  Automotive 
Engineers  (SAE)  standard  J1616,  entitled  "Surface  Vehicle   Recommended 
Practice for Natural Gas Vehicle Fuel Composition."  Natural  Gas  introduced 
into any system covered by the standard shall have a distinctive odor  potent 
enough for its presence to be detected down to a concentration in air of  not 
more than 1/5 of the lower limit of flammability.
  2-2.1.  A device, mechanism,  or  procedure  designed  to    ensure    that 
the maximum water vapor content of the CNG is  in  compliance  with   section 
2-2 shall be utilized at each dispensing station.   This  requirement   shall 
not apply to a residential fueling facility or a vehicle-fueling appliance.
  2-2.1.1.   Procedure  may  include  a  monthly  report  received  from  the 
supplying utility specifying the water content of the natural  gas,   monthly 
testing  of the water vapor   content   of   the   natural   gas    by    the 
dispensing  station operator, or another procedure acceptable to  the   state 
fire   marshal.    The  dispensing  station  operator  shall  make  test  and 
procedure  records  available to the  authority  having   jurisdiction   upon 
request  and  shall  maintain  the records for 1 year.
  2-2.2.  When the authority having jurisdiction has  reason    to    believe 
that the gas quality is not in compliance with section 2-2.1 of the standard,
 the authority having jurisdiction may order the dispensing station owner  to 
cease dispensing until gas quality is shown to be in compliance with  section 
2-2.1 of the standard.
  2-2.3.  An owner or operator  shall  not  continue  to  dispense  CNG  when 
ordered to cease dispensing under section 2-2.2 of the standard.

  History: 1995 AACS.


R 29.4629   Approval.
  Rule 29.  Section 2-3.1 of the standard is amended to read as follows:
  2-3.1  Systems and  system  components  shall  be  listed   or    approved, 
included 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 hose and hose connection.
  (g)  A vehicle fueling connection.
  (h)  An engine fuel system.
  (i)  Electrical equipment related to a CNG system.
  (j)  A dispenser.
  (k)  A water vapor control device or mechanism.

  History: 1995 AACS.


R 29.4630   Design and construction of containers.
  Rule 30.  Sections 2-4.1 and  2-4.1.1  of  the  standard    are    amended, 
section 2-4.7 is added to the standard, and  section  2-4.3.1   is    deleted 
from  the standard, to read as follows:
  2-4.1.  A container shall be in  compliance  with  sections  2-4.2  through 
2-4.6 of the standard or shall be designed, fabricated, tested,  and   marked 
using criteria that  incorporate  an  investigation  to  determine  that  the 
container is safe and suitable for the proposed service, is  recommended  for 
the service by the manufacturer, and is acceptable to the state fire marshal.
  2-4.1.1.  A  container  shall  be  fabricated  of  steel,   aluminum,    or 
composite materials.  The container shall be designed to be   suitable    for 
CNG  service and permanently marked CNG by the  manufacturer.   A   container 
manufactured before the effective date of these rules  may  be  used  in  CNG
 service  if recommended for CNG service by the container  manufacturer   and 
if  acceptable to the state fire marshal.
  2-4.3.1.  Deleted.
  2-4.7.  An owner or  operator   of   a   container   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
 to  the  state fire marshal substantiating container integrity.

  History: 1995 AACS.


R 29.4631   Pressure relief devices.
  Rule 31.  Section 2-5.3 of the standard is amended to read as follows:
  2-5.3.  An owner or operator of a container or a  pressure   vessel    that 
is otherwise in compliance with section  2-4.1  shall  equip  the   container 
or pressure vessel with a pressure relief device  approved  by   the    state 
fire marshal.

  History: 1995 AACS.


R 29.4632   Piping.
  Rule 32.  Section 2-8.4 of the standard is amended to read as follows:
  2-8.4.  The following components shall not be used:
  (a)  A fitting, street ell, or other piping component that  is   made    of 
cast iron, except for a fitting, street ell, or other piping  component  that 
is  in compliance with ASTM standards A-536 (grade 60-40-18), A-395, and A-47 
(grade 35018).
  (b)  Plastic pipe, tubing and fittings.
  (c)  Galvanized pipe and fittings.
  (d)  Aluminum pipe, tubing and fittings.
Exception no. 1:  A refueling connection may be made of  nonsparking  wrought 
aluminum alloy suitable for the pressure employed.
Exception no. 2:  Aluminum pipe, tubing and fittings may be  used  downstream 
of the first-stage pressure regulator in an engine fuel system.
  (e)  Pipe nipples for the initial connection to a container.
  (f)  Copper alloy that has a copper content of more than 70%.

  History: 1995 AACS.


R 29.4633   Installation of fuel supply containers.
  Rule 33.  Section 3-3.1 and section 3-3.3 of the  standard   are    amended 
to read as follows:
  3-3.1.  Fuel supply containers on vehicles may be located  within,   below, 
or above the driver or  passenger  compartment  if  all  connections  to  the 
container or containers are external to, or sealed  and  vented  from,  these 
compartments.
Each container shall be protected by a shield to  prevent  damage  that   may 
occur due to road hazards, loading, unloading, and use of vehicle.
  3-3.3.  Each container shall be mounted in a rack  and    each    container 
rack shall be secured to the vehicle body, bed, or frame to  prevent   damage 
from road hazards, slippage,  loosening  or   rotation   using    a    method 
capable  of withstanding a static force in the 6  principal  directions  (see 
figure  3-3.3) of 8 times the weight of a fully pressurized container.

  History: 1995 AACS.


R 29.4634   Installation of venting systems.
  Rule 34.  Section 3-4.1 of the standard is amended to read as follows:
  3-4.1.     All    pressure     relief     devices      and      connections 
between  pressure-carrying  components   installed    within     a     closed 
compartment  (see section 3-3.1) shall  be  vented  to  the  outside  of  the 
vehicle  at  a  suitable location on the vehicle.  The vent outlet shall  not 
terminate in  the  engine compartment.

  History: 1995 AACS.


R 29. 4635   Installation of piping.
  Rule 35.  Section 3-5.6 of the standard is amended to read as follows:
  3-5.6.  Fuel lines  shall  be   mounted,   braced,   and    supported    to 
minimize vibration and protected against damage, corrosion, and breakage  due 
to strain or wear.  A fuel line shall be supported at least every  24  inches 
(610 mm).

  History: 1995 AACS.


R 29.4636   Installation of valves.
  Rule 36.  Section 3-6.1 is added to the standard,  and    sections    3-6.2 
and 3-6.2.2 of the standard are amended, to read as follows:
  3-6.1.  Each container shall be equipped with a manual or  normally  closed 
remotely actuated  shutoff  valve  connected  directly  to  the  container.
Remotely actuated valves shall be equipped with a provision to manually bleed 
the container.
  3-6.2.  In addition to  the  valve  required  by  section  3-6.1   of   the 
standard, a manual shutoff valve or a  normally  closed  remotely  controlled 
shutoff valve that is closed when  the  engine  is  not  operating  shall  be 
installed to  permit isolation of the container from  the  remainder  of  the 
fuel system.  The manual shutoff valve shall be in an accessible location and 
may not have more than a 90-degree rotation from the  open  position  to  the 
closed position.
  3-6.2.2.  The manual valve location  shall  be  marked  with   the    words 
"MANUAL SHUTOFF VALVE."  Decals or stencils are acceptable markings.

  History: 1995 AACS.


R 29.4637   Installation of fueling connection.
  Rule 37.  Section 3-9.2 of the standard is amended to read as follows:
  3-9.2.  The fueling connection receptacle shall be mounted   to   withstand 
the breakaway force specified in  section  4-11.8  of  the   standard.    The 
receptacle  shall  be  installed  in  accordance  with   the   manufacturer's 
instructions.

  History: 1995 AACS.


R 29.4638   Labeling.
  Rule 38.  Sections 3-11.1.1 and 3-11.1.2 of the  standard  are  amended  to 
read as follows:
  3-11.1.1.   A  label  readily  visible  and  located    in    the    engine 
compartment shall specify all of the following information:
  (a)  That the vehicle is a CNG-fueled vehicle.
  (b)  The system service pressure.
  (c)  The installer's name or company.
  (d)  The container retest date or dates or the expiration date.
  (e)  The total container water volume in gallons (liters).
  3-11.1.2.  A label  located  at   the   fueling    connection    receptacle 
shall specify all of the following information:
  (a)  That the vehicle is a CNG-fueled vehicle.
  (b)  The system service pressure.
  (c)  The container retest date or expiration date.
Exception:  If both labels are located at the fueling  connection  receptacle 
located in the engine compartment, the labels can be combined into  a  single 
label.

  History: 1995 AACS.


R 29.4639   System testing.
  Rule 39.  Section 3-12.1 of the standard is amended to read as follows:
  3-12.1.  The complete  installed  assembly  shall  be   leak-tested   using 
natural gas or inert gas (carbon dioxide or nitrogen or a mixture of these).

  History: 1995 AACS.


R 29.4640   Maintenance and repair.
  Rule 40.  Section 3-13.3 of the standard is amended to read as follows:
  3-13.3.  Pressure  relief  devices  on  cylinders  shall   be    maintained 
in accordance with Compressed  Gas  Association  (CGA)   pamphlet   S-1.1.
Pressure relief devices on  all  other  containers  shall  be  maintained  in 
accordance with the following provisions:
  (a)  Pressure  relief  device  channels  or  other   parts    that    could 
interfere with the functioning of the device  may   not   be    plugged    by 
paint  or  the accumulation of dirt.
  (b)  Compressed natural gas containers shall  be  stored  so  as  to  avoid 
damage.
  (c)  Only qualified personnel shall  be  allowed  to    service    pressure 
relief devices.
  (d)   Only  assemblies  or  parts   manufactured    to     the     original 
manufacturer's specifications shall be used in the repair of pressure  relief 
devices.

  History: 1995 AACS.


R 29.4641   Application.
  Rule 41.  Section 4-1 of the standard is amended to read as follows:
  4-1.  This chapter applies to the design,    construction,    installation, 
and operation of  containers,  pressure  vessels,   compression    equipment, 
buildings and structures, and associated equipment used for the  storage  and 
dispensing of CNG as an engine fuel.  This chapter  does  not  apply   to   a 
residential fueling facility.

  History: 1995 AACS.


R 29.4642   Siting.
  Rule  42.   Sections  4-4.2.3,  4-4.2.4,  4-4.2.6,  4-4.2.8,  4-4.3.2,  and 
4-4.3.10 of the standard are amended to read as follows:
  4-4.2.3.   Compression,  storage,  and  dispensing  equipment    that    is 
outdoors shall be located above the ground, may not be beneath electric power 
lines or where exposed by failure of the power lines and shall be  a  minimum 
of 10 feet (3 m) from the nearest building or line of adjoining property that 
is or  may be built upon or the  nearest  source  of  ignition.   For   fixed 
electrical equipment, see section 4-12.
  4-4.2.4.   Compression,  storage,  and  dispensing  equipment    that    is 
outdoors shall be located as follows:
  (a)  Not less than 10 feet (3  m)  from  the  nearest  public   street   or 
sidewalk line.
  (b)  Not less than 5 feet (1.5 m) from driveways.
  (c)  Not less than 20 feet (6.1  m)  from   flammable    and    combustible 
liquid dispensers.
  (d)  Not less than 20 feet (6.1 m) from  loading  or    unloading    risers 
for aboveground tanks storing flammable or combustible liquids, classes I and 
II.
  (e)  Not less than 20 feet (6.1  m)  from  fill  pipes    of    underground 
storage tank systems storing flammable or combustible liquids, classes I  and 
II.
  (f)  Not less than 50 feet (15 m) from the nearest  rail  of  any  railroad 
main track.
  4-4.2.6.  Combustible storage shall not be permitted within 10 feet  (3  m) 
of any stationary container, compression equipment or dispensing equipment.
  4-4.2.8.  During outdoor fueling operations, the point of  transfer   shall 
be located as follows:
  (a)  Not less than 10 feet (3 m)  from   any   building,    mobile    home, 
public sidewalk, highway, street, road, or line of adjoining property that is 
or may be built upon.
  (b)  Not less than 25 feet (7.6 m)  from   main   line    railroad    track 
center lines.
  (c)  Not less than 50  feet  (15  m)  from  outdoor  places    of    public 
assembly, including school yards, athletic fields and playgrounds.
  (d)  Not less than 5 feet (1.5 m) from driveways.
  (e)  Not less than 3 feet (1 m) from storage containers.
  4-4.3.2.  Deflagration (explosion) venting shall  only  be   provided    in 
an exterior wall or a roof in accordance  with   NFPA   standard    no.    68 
entitled "Guide for Venting of Deflagrations."  Where applicable, snow  loads 
shall  be considered.
4-4.3.10.  Access doors shall have warning signs with the words "WARNING - NO 
SMOKING - FLAMMABLE GAS."  The wording shall be in  plainly  legible,  bright 
red letters on a white background with letters not less than 3 inches (76 mm) 
high.

  History: 1995 AACS.


R 29.4643   Installation of piping and hoses.
  Rule 43.  Section 4-9.3 of the standard is amended,  and   section    4-9.4 
is added to the standard, to read as follows:
  4-9.3.  The use of  hose  in  an  installation  shall  be  limited  to  the 
following items:
  (a)  A vehicle fueling hose.
  (b)  An inlet connection to compression equipment.
  (c)  A section of metallic hose that is not more than 36 inches  (910   mm) 
in length in a pipeline to provide  flexibility  where    necessary.     Each 
section shall be installed so that it will be  protected  against  mechanical 
damage and be readily  visible  for  inspection  and  shall   be    installed 
according   to   the  manufacturer's  recommendations.   The   manufacturer's 
identification  shall  be retained in each section.
  4-9.4.  A bleed valve  or  valves  shall  be  installed  to    allow    for 
the controlled release of compressed natural gas to a safe location.

  History: 1995 AACS.


R 29.4644   Testing.
  Rule 44.  Section 4-10.2 of the standard is amended to read as follows:
  4-10.2.   Pressure  relief  valves  shall  be   tested     according     to 
the manufacturer's recommendations at least every 5 years.

  History: 1995 AACS.


R 29.4645   Installation of emergency shutdown equipment.
  Rule 45.  Sections 4-11.2, 4-11.6,  and  4-11.6.1  of  the   standard   are 
amended to read as follows:
  4-11.2.  The fill line to a storage  container  shall  be  equipped  with a 
backflow check  valve  located  between  the  compressor  and   the   storage 
container to prevent the discharge of natural gas from the container in  case 
of  line, hose, or fittings rupture.
  4-11.6.  Emergency shutdown devices shall be  provided  at  the  dispensing 
area and also at a location which is not less than 10 feet (3  m)  away  from
 the dispensing area and which is along the means of egress.   The   devices, 
when activated, shall shut off the power supply and gas supply at  a    point 
before the compressor and at a  point  in  the  fixed  piping   between   the 
storage container and the dispensing equipment.
  4-11.6.1.   Emergency  shutdown  devices  shall  be    easily    accessible 
and distinctly marked for easy recognition with   a    permanently    affixed 
legible sign which has letters that are not less than 3 inches (76 mm) high.

  History: 1995 AACS.


R 29.4646   Installation of electrical equipment.
  Rule 46.  Section 4-12.1 is added to the standard to read as follows:
  4-12.1.  The electrical classification under table 4-12 may  be    reduced, 
or hazardous  areas  limited   or   eliminated,    by    adequate    positive 
pressure ventilation from a  source  of  clean  air   or   inert    gas    in 
conjunction  with effective safeguards against ventilator failure by  purging 
methods recognized in NFPA standard  no.  496,   entitled    "Standard    for 
Purged  and  Pressurized  Enclosures   for    Electrical    Equipment."     A 
change   of   the   electrical classification shall be approved by the  state 
fire marshal.

  History: 1995 AACS.


R 29.4647   Operation.
  Rule 47.  Section 4-14.9  of  the  standard  is  amended,   and    sections 
4-14.10, 4-14.11, and 4-14.12 are added to the standard, to read as follows:
  4-14.9.  A warning  sign  that  has   the   words   "STOP    MOTOR,"    "NO 
SMOKING," "FLAMMABLE GAS" shall be posted at a  dispensing  station   and   a 
compressor area.  The location  of  a  sign  shall  be  determined  by  local 
conditions.   Sign letters shall be not less than 3 inches (76  mm)  high  so 
that they are visible and legible from each point of transfer.
  4-14.10.  Each container filling location that is  open  to   the    public 
shall have an attendant or supervisor on duty who meets the  requirements  of 
section 1-9 of the standard.
  4-14.11.  A container filling location that is not open  to   the    public 
does not require an attendant or  supervisor.   The  private   location   may 
include  a card-  or  key-controlled   dispensing   device.     The    person 
performing  the transfer shall  meet   the   requirements    prescribed    in 
section  1-9  of  the standard.  Operating instructions  for  performing  the 
transfer shall be posted on a legible sign in the immediate vicinity  of  the 
point of transfer.
  4-14.12.  At a location where the time to fill each  container   is    more 
than 15 minutes, a person is not required  to  be  in  attendance   if    the 
person performing the transfer meets the requirements of section 1-9  of  the 
standard.

  History: 1995 AACS.


R 29.4648   Maintenance.
  Rule 48.  Section 4-16.4.1 of the standard is amended to read as follows:
  4-16.4.1.  As a  precaution  to   keep   pressure   relief    devices    in 
reliable operating condition, care shall be  taken  in  the    handling    or 
storing  of compressed natural gas containers  to   avoid    damage.     Care 
shall  also  be exercised to avoid the plugging, by paint  or   other    dirt 
accumulation,  of pressure relief device channels or other parts  that  could 
interfere with  the functioning of the devices.  Only   qualified   personnel 
shall  be  allowed  to service pressure relief devices.  Only  assemblies  or 
parts  manufactured  to the original manufacturer's specifications  shall  be 
used  in  the  repair  of pressure relief devices.

  History: 1995 AACS.


R 29.4649   Vehicle-fueling appliances in commercial applications.
  Rule 49.  Sections 4-17 and 4.17.7 of the standard are amended   to    read 
as follows:
  4-17.  Vehicle-fueling appliances in commercial applications  not   located 
at a private residence.
  4-17.7.  Vehicle-fueling appliances may not be installed within  10    feet 
(3 m) of any storage container.

  History: 1995 AACS.


R 29.4650   Scope.
  Rule 50.  Section 5-1.1 of the standard is amended to read as follows:
  5-1.1.  A residential fueling facility (RFF) is an  assembly    which    is 
used for the compression and delivery of natural gas into vehicles, including
 the assemblies associated equipment and piping, and which is  located  at  a 
private residence.  The capacity of an RFF may not be more than  5  SCFM   of 
natural gas.  A person may not store CNG at an  RFF   other   than    in    a 
vehicle  fuel supply container.

  History: 1995 AACS.


R 29.4651   System component qualifications.
  Rule 51.  Section 5-2.3 of the standard is amended to read as follows:
  5-2.3.  Vehicle-fueling appliances  are  exempt  from   the    requirements 
of sections 2-2.1, 4-2, 4-3, 4-4,    4-6, 4-8 through 4-16, and  2-5  through 
2-10 of the standard.

  History: 1995 AACS.


R 29.4652   Reference publications.
  Rule 52.  Sections 6-1, 6-1.1, and 6-1.2 of the standard    are    amended, 
and sections 6-1.3, 6-1.4, 6-1.5,  6-1.6, 6-1.7,  and  6-1.8  are  added   to 
the standard, to read as follows:
  6-1.  The standards specified in this rule  are  adopted  by  reference  in 
these  rules.   Copies  of  the  adopted  standards   are    available    for 
inspection  and distribution either at the offices of the State  Fire  Safety 
Board,  Michigan Department of  State  Police,   Fire    Marshal    Division, 
7150  Harris  Drive, Lansing, Michigan 48913 or from the  publisher  of  each 
standard as  listed  in the following rules.  The cost of  the  standards  at 
the time  of  adoption  of these rules are as specified.
  6-1.1.   NFPA  publications  are  available  from   the    National    Fire 
Protection Association, 1 Batterymarch Park,  P.O.  Box  9101,   Quincy,   MA 
02269-9101, telephone number 1-800-344-3555.
  NFPA 37, 1990 edition, entitled "Standard for the Installation   and    Use 
of Stationary Combustion Engines and Gas Turbines."  Cost:  $15.50.
  NFPA 54, 1992 edition, entitled "National Fuel Gas Code."  Cost:  $25.50.
  NFPA 59A, 1990 edition, entitled "Standard for the   Production,    Storage 
and Handling of Liquefied Natural Gas (LNG)."  Cost:  $18.75.
  NFPA 68, 1988 edition, entitled "Standard for Venting  of   Deflagrations." 
Cost:  $20.75.
  NFPA 70, 1993 edition, entitled "National Electrical Code."  Cost:  $37.50.
  NFPA  220,   1992   edition,   entitled   "Standard     on     Types     of 
Building Construction."  Cost:  $16.00.
  NFPA 259, 1987 edition, entitled "Standard Test Method for  Potential  Heat 
of Building Materials."  Cost:  50 cents per page.
  NFPA  496,  1989   edition,   entitled   "Standard    for    Purged     and 
Pressurized Enclosures for Electrical Equipment."  Cost:  50 cents per page.
  6-1.2.   ASME  publications  are  available  from   American   Society   of 
Mechanical Engineers, 345 East  47th  Street,  New  York,  New  York,  10017, 
telephone  number 1-800-843-2763.
  ANSI/ASME B31.3  (1980),  entitled  "American  National    Standard    Code 
for Chemical Plant and Petroleum Refinery Piping."  Cost:  $411.00.
  "Boiler and Pressure Vessel Code," section X (1986).  Cost:  $215.00.
  6-1.3.  ASTM publications  are  available  from  the    American    Society 
for Testing and Materials, 1916  Race  Street,  Philadelphia,    PA    19103, 
telephone number 215-299-5585.
  ASTM A-47-1984, entitled "Specification for Malleable Iron Castings."  Cost:
$14.75.
  ASTM  A-395-1986,  entitled  "Specification    for     Ferritic     Ductile 
Iron Pressure-Retaining Castings for Use at Elevated Temperatures."   Cost:
$14.75.
  ASTM A-536-1984, entitled "Specification  for  Ductile  Castings."   Cost:
$14.75.
  ASTM E-136-1982, entitled "Standard Method of Test Behavior  of   Materials 
in a Vertical Tube Furnace at 750° C."  Cost:  $14.75.
  ASTM 380, entitled "Standard for Metric Practice."  Cost:  $14.75.
  6-1.4.   CGA  publications  are  available  from   the    Compressed    Gas 
Association,  Inc.  1725  Jefferson  Davis  Highway,  Ste.  1004,  Arlington, 
Virginia 22202-4100, telephone number (703) 412-0900.
  CGA S-1.1, entitled  "Cylinders  for  Compressed  Gases  (1979)."   Cost:
$136.00.
  6-1.5.  U.S.  DOT  and  TC  container  data  is  available  from  the  U.S.
Department of Transportation, 400 75th Street, SW, Washington, DC  20590  and 
the Canadian Transport Commission, Transport Canada  Building,    Place    de 
Ville,  Ottawa, Ontario, K1A ON5.
  6-1.6.    API   publications   are    available    from    the     American 
Petroleum Institute, 1220 L Street, NW, Washington,  DC   20005,    telephone 
number  (202) 682-8042.
  API RP 2003, entitled  "Protection  Against  Ignitions  Arising   Out    of 
Static, Lightning and Stray Currents," Fourth Edition, 1982.  Cost $39.00.
  6-1.7.   AGA  publications  are  available  from   the     American     Gas 
Association, 1515 Wilson Blvd., Arlington, Virginia 22209,  telephone  number 
(703) 841-8400.
  ANSI/AGA NGV2, 1992, entitled "Basic Requirements  for  Compressed  Natural 
Gas Vehicle (NGV) Fuel Containers."  Cost:  $82.00.
  ANSI/AGA NGV1, 1992,  entitled  "Requirements  for    Compressed    Natural 
Gas Vehicles (NGV) Refueling Connection Devices."  Cost:  $90.00.
  6-1.8.    CSA   publications   are    available    from    the     Canadian 
Standards Association, 178 Rexdale Blvd., Rexdale, Ontario, Canada M9W   1R3, 
telephone number (416) 747-4044.
  CSA B51-1991, entitled "Boiler, Pressure Vessel and Pressure Piping  Code." 
Cost:  $39.00.

  History: 1995 AACS.