SISAPCD RULE 8.3 HEX. CHROM. EMIS. FROM CHROME PLATING, ETC          
LAST REVISED 07/11/89          
          
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          RULE 8.3 Hexavalent  Chromium  Emissions  from Chrome Plating and
                   Chromatic Acid Anodizing Operations
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          A. Purpose
             To  comply  with  the California Code of Regulations,  Section
             93101,  by  controlling   airborne   emissions  of  hexavalent
             chromium.

          B. Definitions

            1. Ampere-hours
                The integral of electrical current  applied  to  a  plating
                tank (amperes) over a period of time (hours).

            2.  Anti-mist Additive
                A  chemical  which  reduces the emission rate from the tank
                when added to and maintained in the plating tank.

            3. Chrome
               Metallic chrome.

            4. Chrome Plating
               Either hard or decorative chrome plating.

            5. Chromic Acid
                An  aqueous  solution  of   chromium  trioxide  (CrO3),  or
                commercial solution containing chromic acid, dichromic acid
                (H2CrO7), or trichromic acid (H2Cr3O10).

            6. Chromic Acid Anodizing
                The  electrolytic  process  by which  a  metal  surface  is
                converted  to  an  oxide  surface  coating  in  a  solution
                containing chromic acid.

            7. Chromium
               Hexavalent chromium.

            8. Control Equipment
                Any  device  which  reduces emissions  from  the  emissions
                collection system.

            9. Decorative Chrome Plating
                The process by which  chromium  is  electrodeposited from a
                solution containing compounds of chromium  onto  an  object
                resulting  in a chrome layer 1 micron (0.04 mil.) thick  or
                less.

           10. Emission Factor
                The mass of chromium emitted during a test conducted in the
                emissions collection  system  in  accordance  with ARB Test
                Method  425,  divided by the ampere-hours consumed  by  the
                tanks in the tested  emissions collection system, expressed
                as  the  mass  of  chromium   emitted  per  ampere-hour  of
                electrical current consumed.

           11. Emissions Collection System
                A  device  or apparatus used to gather  chromium  emissions
                from the surface  of  a  chrome  plating  or  chromic  acid
                anodizing tank or tanks.

           12. Facility
                A  business  or  businesses  engaged  in  chrome plating or
                chromic acid anodizing which are owned or operated  by  the
                same  person  or persons and are located on the same parcel
                or on contiguous parcels.

           13.  Facilitywide Emissions  from Hard Chrome Plating or Chromic
                Acid Anodizing
                The total emissions from all hard chrome plating or chromic
                acid  anodizing  at  the facility  over  a  calendar  year.
                Emissions shall be calculated  as the sum of emissions from
                the  emissions  collection system  at  the  facility.   The
                emissions from an  emissions  collection  system  shall  be
                calculated  by  multiplying  the  emission  factor for that
                emissions  collection  system  by  the  sum of ampere-hours
                consumed during that year for all of the  tanks  served  by
                the emissions collection system.

           14. Hard Chrome Plating
                The  process  by  which chromium is electrodeposited from a
                solution containing  compounds  of  chromium onto an object
                resulting  in a chrome layer thicker than  1  micron  (0.04
                mil).

           15. Plating Tank
                Any container  used  to  hold  a  chromium  or chromic acid
                solution for the purposes of chrome plating or chromic acid
                anodizing.

           16.  Uncontrolled  Chromium  Emissions  from  the  Hard   Chrome
                Plating or Chromic Acid Anodizing Facility
                The   chromium  emissions  from  the  emissions  collection
                systems  at  the  facility  calculated  as  if  no  control
                equipment  is  in  use.   For  the  purpose  of determining
                compliance   with  this  rule,  the  uncontrolled  chromium
                emissions shall  be  calculated  using  an  emission factor
                based on tests conducted in accordance with ARB Test Method
                425 or 14 mg/amp-hour, whichever is less.

          C. Requirements for Decorative Chrome Plating Facilities
             No  person  shall  operate  a  decorative chrome plating  tank
             unless an anti-mist additive is continuously maintained in the
             plating tank, or control equipment is installed and used, in a
             manner which has been demonstrated  to  and  approved  by  the
             Control  Officer  as reducing chromium emissions by 95 percent
             or  more relative to  chromium  emissions  when  an  anti-mist
             additive  is  not  maintained,  or  control  equipment  is not
             installed and used.

          D. Requirements   for   Hard  Chrome  Plating  and  Chromic  Acid
             Anodizing Facilities

            1.  The owners or operators  of  all  hard  chrome  plating and
                chromic   acid   anodizing  facilities  shall  maintain   a
                continuous  record   of   current   integrated   over  time
                (amperehours)  for  all  plating  tanks for each collection
                system  used  in the hard chrome plating  or  chromic  acid
                anodizing operations  and  shall, submit the information to
                the Control Officer.

            2.  No  person shall operate a plating  tank  for  hard  chrome
                plating  or  chromic  acid anodizing unless the tank has an
                emissions collection system.

            3.  No person shall operate  a  hard  chrome plating or chromic
                acid anodizing tank unless:
               a.  The  chromium  emissions from the  emissions  collection
                   system serving the  plating tank have been reduced by 95
                   percent or more of the  uncontrolled  chromium emissions
                   or
               b.  The  chromium  emissions  from the emissions  collection
                   system serving the plating  tank  have  been  reduced to
                   less   than   0.15   milligrams  (mg)  of  chromium  per
                   amperehour of electrical  charge  applied to the plating
                   tank.

            4.  No  person  shall  operate a hard chrome  plating  tank  or
                chromic acid anodizing  tank  at a facility if facilitywide
                chromium emissions from hard chrome plating or chromic acid
                anodizing are greater than 2 pounds per year, but less than
                10 pounds per year, unless:
               a.  The  chromium emissions from  the  emissions  collection
                   systems  serving  the plating tanks have been reduced by
                   at  least  99  percent   of  the  uncontrolled  chromium
                   emissions from the hard chrome  plating  or chromic acid
                   anodizing facility or
               b.  The  chromium  emissions  from the emissions  collection
                   systems are reduced to less than 0.03 mg of chromium per
                   ampere-hour of electrical charge applied to the tanks.

            5.  No person shall operate a hard  chrome  plating  or chromic
                acid anodizing tank at a facility if facilitywide  chromium
                emissions   from   hard  chrome  plating  or  chromic  acid
                anodizing are 10 pounds per year or greater unless:
               a.  The chromium emissions  from  the  emissions  collection
                   systems  serving the plating tanks have been reduced  by
                   at  least 99.8  percent  of  the  uncontrolled  chromium
                   emissions  from  the hard chrome plating or chromic acid
                   anodizing facility or
               b.  The chromium emissions  from  the  emissions  collection
                   systems  are  reduced  to less than 0.006 mg of chromium
                   per ampere-hour electrical charge applied to the tanks.

          E. Compliance Schedule
             The owner or operator of any facility  subject  to  this  rule
             shall  comply  with  its  provisions  at the time the facility
             begins operation.

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