SACAQMD RULE 443 LEAKS FROM SYN. ORG. CHEM. & POLYMER MFG.          
LAST REVISED 11/16/93          

          SACRAMENTO METROPOLITAN AQMD                RULES AND REGULATIONS
             RULE  443  LEAKS  FROM  SYNTHETIC ORGANIC CHEMICAL AND POLYMER
                        MANUFACTURING
                                          Adopted 6-5-79
                         (Amended 11-20-84, 10-31-89, 9-25-90, 11-16-93)



                                              INDEX

          100 GENERAL
              101  PURPOSE
              102  EXEMPTION, VACUUM CONDITION
              103  EXEMPTION, VAPOR PRESSURE

          200 DEFINITIONS
              201  AFFECTED DEVICES
              202  AGITATORS
              203  BACKGROUND
              204  CHEMICAL PLANT
              205  COMPRESSOR
              206  ESSENTIAL AFFECTED DEVICE OR FLANGE
              207  EXEMPT COMPOUNDS
              208  FLANGE
              209  HEAVY LIQUID
              210  INACCESSIBLE AFFECTED DEVICE OR FLANGE
              211  LEAK
              212  LEAK MINIMIZATION
              213  LIGHT LIQUID
              214  PRESSURE RELIEF DEVICE
              215  PROCESS UNIT
              216  PUMP
              217  VALVE
              218  VOLATILE ORGANIC COMPOUNDS

          300 STANDARDS
              301  AFFECTED DEVICES AND FLANGES
              302  INSPECTION REQUIREMENTS
              303  REPAIR REQUIREMENTS
              304  INACCESSIBLE AFFECTED DEVICES AND FLANGES

          400 ADMINISTRATIVE REQUIREMENTS
              401  VIOLATION

          500 MONITORING AND RECORDS
              501  TESTING PROCEDURE
              502  RECORD KEEPING
          
          100 GENERAL

              101  PURPOSE:   To  limit   emissions   of  volatile  organic
                   compounds  from  leaking  components including  but  not
                   limited to: flanges and affected  devices which have the
                   potential to vent to the atmosphere  at  chemical plants
                   that   manufacture   synthetic  organic  chemicals   and
                   polymers.

              102  EXEMPTION, VACUUM CONDITION:   The  provisions  of  this
                   rule  shall  not  apply  to  affected devices or flanges
                   which are part of a system which  is  operating at 5 kPa
                   (kilopascals)  (0.7  psi)  or greater below  atmospheric
                   pressure.

              103  EXEMPTION,  VAPOR  PRESSURE:    The  routine  monitoring
                   requirements of Section 302 shall  not  apply  to  those
                   volatile  organic  compounds  with a vapor pressure less
                   than or equal to 0.3 kPa at 20oC  (0.05 psia at 68oF) as
                   determined by methods specified in Section 501.5.

          200 DEFINITIONS

              201  AFFECTED DEVICES:  Including but not  limited to valves,
                   pumps,    compressors,    open-ended   lines,   sampling
                   connections, agitators and pressure relief devices.

              202  AGITATOR:   Any  device or apparatus  with  an  external
                   shaft used to stir, blend, shake, or mix process streams
                   containing VOC.

              203  BACKGROUND:    A  reading   as  methane  on  a  portable
                   hydrocarbon detection instrument  which is determined at
                   least three (3) meters upwind from  the  affected device
                   or  flange  to  be  inspected  and uninfluenced  by  any
                   specific emission point.

              204  CHEMICAL PLANT:  A chemical plant is any plant producing
                   organic  chemicals  and/or  manufacturing   products  by
                   organic chemical processes subject to Rule 201.

              205  COMPRESSOR:  A  machine  used  to  compress, or increase
                   pressure on, gases.

              206  ESSENTIAL AFFECTED DEVICE OR FLANGE:  An affected device
                   or flange which cannot be taken out  of  service without
                   shutting down the process unit it serves.

              207  EXEMPT  COMPOUNDS:  The following compounds  are  exempt
                   from the definition of VOC in Section 218:
                   207.1   methane
                   207.2   carbon dioxide
                   207.3   carbon monoxide
                   207.4   carbonic acid
                   207.5   metallic carbides or carbonates
                   207.6   ammonium carbonate
                   207.7   1,1,1-trichloroethane
                   207.8   methylene chloride
                   207.9   dichlorotrifluoroethane (HCFC-123)
                   207.10  2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124)
                   207.11  trichlorofluoromethane (CFC-11)
                   207.12  dichlorodifluoromethane (CFC-12)
                   207.13  trichlorotrifluoroethane (CFC-113)
                   207.14  dichlorotetrafluoroethane (CFC-114)
                   207.15  chloropentafluoroethane (CFC-115)
                   207.16  pentafluoroethane (HFC-125)
                   207.17  1,1,2,2-tetrafluoroethane (HFC-134)
                   207.18  tetrafluoroethane (HFC-134a)
                   207.19  dichlorofluoroethane (HCFC-141b)
                   207.20  chlorodifluoroethane (HCFC-142b)
                   207.21  1,1,1-trifluoroethane (HFC-143a)
                   207.22  chlorodifluoromethane (HCFC-22)
                   207.23  trifluoromethane (HFC-23)
                   207.24  1,1-difluoroethane (HFC-152a)
                   207.25  The  following  four  classes of perfluorocarbon
                           compounds:
                           a.  Cyclic,  branched,  or   linear,  completely
                               fluorinated alkanes.
                           b.  Cyclic,  branched,  or  linear,   completely
                               fluorinated ethers, with no unsaturations.
                           c.  Cyclic,   branched,  or  linear,  completely
                               fluorinated    tertiary   amines   with   no
                               unsaturations.
                           d.  Sulfur-containing  perfluorocarbons  with no
                               unsaturations and with sulfur bonds only  to
                               carbon and fluorine.

              208  FLANGE:   A projecting rim on a pipe or piping component
                   used to attach it to another piping detail.

              209  HEAVY LIQUID:   A fluid with vapor pressure less than or
                   equal  to  0.3 kPa  at  20oC  (0.04  psia  at  68oF)  as
                   determined by the methods specified in Section 501.5.

              210  INACCESSIBLE AFFECTED DEVICE OR FLANGE:
                   210.1   An affected  device or flange that would require
                           the elevation  of  monitoring  personnel  higher
                           than  two  (2)  meters  above  permanent support
                           surfaces or require scaffolding; or
                   210.2   An affected device or flange located  more  than
                           two  (2) meters away from a platform when access
                           is required from a platform.

              211  LEAK:  A leak is :
                   211.1   The  dripping   of   liquid   volatile   organic
                           compounds  in  excess of three drops per minute;
                           or
                   211.2   A reading as methane  on  a portable hydrocarbon
                           detection instrument of 10,000  ppm  or  greater
                           above   background   when  measured  within  one
                           centimeter of the source; or
                   211.3   The appearance of a visible mist.

              212  LEAK  MINIMIZATION:   The  tightening,   adjustment,  or
                   addition of packing material to any affected  device  or
                   flange,  or  the  replacement  of any affected device or
                   flange,  or the addition or replacement  of  gaskets  to
                   flanges  which   reduces   the   rate,   appearance,  or
                   concentration   of leakage from the affected  device  or
                   flange.

              213  LIGHT LIQUID:  A  fluid with vapor pressure greater than
                   0.3 kPa at 20oC (0.04 psia at 68oF) as determined by the
                   methods specified in Section 501.5.

              214  PRESSURE  RELIEF  DEVICE:   A  device  used  to  relieve
                   pressure  in  applications where  process  pressure  may
                   exceed the maximum  allowable  working  pressure  of the
                   processing equipment.

              215  PROCESS   UNIT:    The  group  of  all  equipment  in  a
                   continuous  line  involved   in   the  manufacturing  or
                   processing of synthetic organic chemicals or polymers.

              216  PUMP:  A machine or device for transferring  a liquid or
                   gas from a source or container through tubes or pipes to
                   another container or receiver.

              217  VALVE:  Any device that regulates flow of a fluid  in  a
                   piping system by means of an external actuator acting to
                   permit  or  block  passage  of  a  fluid  including  the
                   attached flange and the flange seal.
              218  VOLATILE  ORGANIC  COMPOUNDS:   Compounds  containing at
                   least one atom of carbon except for the compounds listed
                   in Section 207.

          300 STANDARDS

              301  AFFECTED DEVICES AND FLANGES:
                   301.1   A  person shall not use any affected  device  or
                           flange at a chemical plant for handling volatile
                           organic compounds unless such affected device or
                           flange  does  not  allow  the  volatile  organic
                           compound   being   handled   to  leak  into  the
                           atmosphere.
                   301.2   Each affected device located at  the  end  of  a
                           pipe   or   line   containing  volatile  organic
                           compounds shall be sealed  with  a blind flange,
                           plug, or cap when not in use, except  for any of
                           the following:
                           a.  Valves on product sampling lines
                           b.  Safety pressure relief valves
                           c.  Bleeder  valves in double block and  bleeder
                               valve systems
                           d.  Water drain valves
                           e.  Loading spouts
                   301.3   Each affected  device  or  flange which has been
                           discovered to be leaking shall be affixed with a
                           weatherproof, brightly colored,  readily visible
                           tag  bearing  the date the leak was  discovered.
                           The tag shall remain  in place until the leaking
                           affected   device  is  repaired   or   replaced,
                           reinspected  and  found to be in compliance with
                           the requirements of this rule.

              302  INSPECTION  REQUIREMENTS:     Each  affected  device  or
                   flange  handling  volatile organic  compounds  shall  be
                   inspected  for  leaks    according   to   the  following
                   schedule:
                   302.1   Quarterly    inspections    with    a   portable
                           hydrocarbon   detection   instrument   for   the
                           following affected devices in VOC service:
                           a.  Pumps and valves in light liquid service.
                           b.  Valves,   compressors  and  pressure  relief
                               devices in gas service.
                   302.2   Weekly inspections  for  visible leaks for pumps
                           in light liquid service.
                   302.3   Inspection  within 24 hours  after  every  over-
                           pressure relief to ensure the valve has properly
                           reseated for every pressure relief device.
                   302.4   Annual  inspections  for  all  flanges  using  a
                           portable hydrocarbon detection device.
                   302.5   Annual inspection  of valves, if less than 2% of
                           all valves associated with a process unit in VOC
                           service  are  found  to   be  leaking  for  five
                           consecutive  quarterly  inspections.   Quarterly
                           inspections must be resumed if during the annual
                           inspection more than 2% of  the valves are found
                           to be leaking.

              303  REPAIR REQUIREMENTS:
                   303.1   Each leaking affected device  or flange shall be
                           repaired within two working days after detection
                           of such leak, except as provided  in  Subsection
                           303.2. The repairs shall be such that there will
                           be a no leak condition.
                   303.2   For  each  essential  affected  device or flange
                           found to be leaking that cannot be  brought into
                           compliance  with  Section  303.1,  the following
                           actions shall be taken:
                           a.  If,  after  efforts  to repair in accordance
                               with Section 303.1 without shutting down are
                               completed and the leak  rate is less than 10
                               drops   per   minute,   or  the   detectable
                               hydrocarbon  concentration   is   less  than
                               75,000 ppm (expressed as methane),  but more
                               than 10,000 ppm (expressed as methane) above
                               background  as  measured within 1 centimeter
                               of the source, all  of the following actions
                               shall be taken:
                               1.  Within two working  days of discovery of
                                   non-repairability,  the   Air  Pollution
                                   Control Officer shall be given notice of
                                   the  date the essential affected  device
                                   or flange will be repaired.
                               2.  Within  two  working days of repair, the
                                   Air Pollution  Control  Officer shall be
                                   notified of the date of repair.
                               3.  Inspection  of  such essential  affected
                                   device or flange  shall  be made monthly
                                   until such essential affected  device or
                                   flange   is   returned   to  a  no  leak
                                   condition.
                               4.  Repairs to bring such essential affected
                                   device or flange to a no leak  condition
                                   shall  be  completed at the next process
                                   turnaround or  plant  shutdown or within
                                   six  months  whichever  is  the  shorter
                                   length of time.
                           b.  If,  after  efforts to repair in  accordance
                               with Section 303.1 without shutting down are
                               completed and  the leak rate is 10 drops per
                               minute  or  greater,   or  appearance  of  a
                               visible mist continues,  or  the  detectable
                               hydrocarbon   emissions   are   75,000   ppm
                               (expressed  as  methane) or greater measured
                               within 1 centimeter  of  the  source, one of
                               the following actions shall be taken.
                               1.  Leak minimization repairs shall  be made
                                   within  two  (2) days which reduces  the
                                   leakage  rate  to  the  rate  stated  in
                                   Subsection 303.2.a  and  such  essential
                                   affected device shall be subject  to the
                                   provisions of Subsection 303.2.a, or
                               2.  The  emissions  from  the  leak shall be
                                   reduced  by  90% within two (2)  working
                                   days by the use  of  an emission control
                                   device,  as determined  by  the  methods
                                   specified  in  Sections 501.3 and 501.4,
                                   or
                               3.  A petition for a variance shall be filed
                                   in accordance with  Rule  602, BREAKDOWN
                                   CONDITIONS, EMERGENCY VARIANCES.
                   303.3   A person complying with Sections 303.1, 303.2.a,
                           303.2.b.1,  and  303.2.b.2 shall be exempt  from
                           the   provisions   of    Rule   602,   BREAKDOWN
                           CONDITIONS, EMERGENCY VARIANCES.

              304  INACCESSIBLE AFFECTED DEVICES AND FLANGES:  Inaccessible
                   affected  devices  and  flanges  shall  be  exempt  from
                   provisions of Section 302, provided:
                   304.1   The number of inaccessible  affected devices and
                           flanges subject to this section  does not exceed
                           5%  of the total number of affected  devices  or
                           flanges  associated  with a process unit subject
                           to Section 302, and
                   304.2   A list of the inaccessible  affected devices and
                           flanges,  including location,  subject  to  this
                           Section is  made  available to the Air Pollution
                           Control Officer upon request, and
                   304.3   The reason why the  affected device or flange is
                           inaccessible is provided  with the list prepared
                           pursuant to Section 304.2, and
                   304.4   The inaccessible affected devices or flanges are
                           inspected annually.

          400 ADMINISTRATIVE REQUIREMENTS

              401  VIOLATION:  Any leak originally identified  by  the  Air
                   Pollution Control Officer is a violation.

          500 MONITORING AND RECORDS:

              501  TESTING PROCEDURE:  A  result by any of the below listed
                   test  methods  which  shows   non-compliance   with  any
                   provision  of  the rule shall constitute a violation  of
                   the rule.
                   501.1   LEAK DETECTION: EPA Reference Method 21 shall be
                           used to determine the existence of a leak.
                   501.2   VOC  CONTENT:  VOC  weight  percent  of  process
                           fluids shall be determined by ASTM Method E-168,
                           E-169, E-260, EPA Method 24.
                   501.3   CONTROL  DEVICE: Control efficiency and emission
                           rates of control  devices shall be determined by
                           EPA Method 25.
                   501.4   COLLECTION  EFFICIENCY:   Collection  efficiency
                           shall    be   determined   using   Environmental
                           Protection   Agency  Guidelines  for  Developing
                           Capture   Efficiency   Protocols,   55   Federal
                           Register 26865, June 29, 1990.

                   501.5   VAPOR PRESSURE:  Vapor pressures may be obtained
                           from  standard  reference   texts   or   may  be
                           determined by ASTM D-2879-86.
                   501.6   DETERMINATION    OF    EXEMPT    PERFLUOROCARBON
                           COMPOUNDS:   If any of the perfluorocarbons  are
                           being claimed  as  exempt  compounds, the person
                           making  the claim must state  in  advance  which
                           compounds are present, and the EPA-approved test
                           method used  to  make the determination of these
                           compounds.

              502  RECORD  KEEPING: A person subject  to  this  rule  shall
                   maintain  records  of inspections for two years and make
                   inspection  records available  for  review  by  the  Air
                   Pollution Control Officer upon request.
                   502.1   Such  records  shall  include  the following for
                           each  inspection:  identity  of  the  device  or
                           flange, date of inspection, date of detection of
                           leak, leak rate, date of repair, leak rate after
                           repair, date when leak free, date when device or
                           flange returns to regular inspection schedule.