PLACER COUNTY AIR POLLUTION CONTROL DISTRICT

RULE 904 - AIRBORNE TOXIC CONTROL MEASURE FOR HEX CHROME, ETC.
(Adopted 05/07/91)

                                   CONTENTS



          100. GENERAL



               101. PURPOSE

               102. APPLICABILITY

               103. EXEMPTION, DISCONTINUED CHROMATE TREATMENT

               104. EXEMPTION, WOODEN COOLING TOWERS



          200. DEFINITIONS



               201. COOLING TOWER

               202. HEXAVALENT CHROMIUM/CHROMATE

               203. WATER TREATMENT CHEMICALS



          300. STANDARDS



               301. PROHIBITION ON HEXAVALENT CHROMIUM/CHROMATE USE

               302. LIMITATION  ON  CIRCULATING  WATER  HEXAVALENT CHROMIUM

                    CONCENTRATIONS



          400. ADMINISTRATIVE REQUIREMENTS



               401. EXISTING COOLING TOWERS, GENERAL REQUIREMENTS

               402. EXISTING COOLING TOWERS, NOTIFICATION

               403. PETITION FOR EXEMPTION, WOODEN COOLING TOWERS

               404. PETITION   FOR   EXEMPTION   FROM   TEST  REQUIREMENTS,

                    DISCONTINUED CHROMATE TREATMENT

               405. NEW COOLING TOWER CONSTRUCTION, NOTIFICATION



          500. MONITORING AND RECORDS



               501. DETERMINATION  OF  HEXAVALENT CHROMIUM  IN  CIRCULATING

                    WATER

               502. TESTING REQUIREMENTS

               503. RECORDKEEPING

          

          

          

          100. GENERAL



               101. Purpose:  The  purpose   of  this  rule  is  to  reduce

                    emissions of hexavalent chromium from cooling towers by

                    eliminating chromium based  circulating water treatment

                    programs,  pursuant  to Title 17,  California  Code  of

                    Regulations,   Section   93103.   Hexavalent   chromium

                    containing  compounds  may be  ingredients  of  cooling

                    tower circulating water treatment chemicals.



               102. Applicability: This rule  shall apply to any person who

                    owns  or  operates,  or who plans  to  build,  own,  or

                    operate, a cooling tower.



               103. Exemption, Discontinued Chromate Treatment: Section 502

                    does not apply to cooling  tower operators who have not

                    used  hexavalent  chromium for  water  treatment  since

                    November 3, 1990, or  cooling  tower  circulating water

                    was  never treated with hexavalent chromium  containing

                    compounds,  and who have met all petition for exemption

                    requirements of Section 404.



               104. Exemption, Wooden  Cooling Towers: Operators of cooling

                    towers having wooden  components exposed to circulating

                    water may petition for  a  temporary exemption from the

                    Section    302   hexavalent   chromium    concentration

                    limitation for  the  period  from  the compliance date,

                    November 3, 1991, up to May 3, 1992, providing that the

                    petition for exemption requirements  of Section 403 are

                    met.



          200. DEFINITIONS



               201. Cooling Tower - Any device which evaporates circulating

                    water to remove heat from a process, a  building,  or a

                    refrigerator, and puts the heat into the ambient air.



               202. Hexavalent  Chromium/Chromate - Hexavalent chromium and

                    chromate are  identified toxic air contaminates and are

                    a cancer-causing  (toxic) substance existing as part of

                    various  inorganic  chromate  compounds,  for  example,

                    sodium dichromate or lead chromate.



               203. Water  Treatment  Chemicals  -  Any combination  of

                    chemicals   added  to  cooling  tower  water  including

                    tracers, corrosion inhibitors, antiscalants,

                    dispersants, biocides.



          300. STANDARDS



               301. Prohibition  On  Hexavalent  Chromium/Chromate   Use  -

                    Effective   November   3,   1991,  hexavalent  chromium

                    containing  compounds shall not  be  added  to  cooling

                    tower circulating water, and



               302. Limitation On  Circulating  Water  Hexavalent  Chromium

                    Concentrations  - Effective November 3, 1991, a cooling

                    tower shall not be  operated  with  a circulating water

                    hexavalent chromium concentration greater than or equal

                    to 0.15 milligrams per liter.



          400. ADMINISTRATIVE REQUIREMENTS



               401. Existing  Cooling  Towers, General Requirements  -  For

                    cooling towers existing  on  May  7, 1991, the owner or

                    operator shall notify the District  in  accordance with

                    Section 402, and no later than November 3,  1991,  each

                    cooling tower shall comply with Section 301 and Section

                    302 requirements. Owners or operators of cooling towers

                    with  wooden  components  exposed  to circulating water

                    shall comply with the limitation of Section 302, unless

                    a  temporary exemption has been granted  in  accordance

                    with Section 403.



               402. Existing  Cooling  Towers, Notification - No later than

                    August 5, 1991, each  person  who  owns  or  operates a

                    cooling  tower  shall submit the following information,

                    in writing, to the District for each cooling tower:



                    402.1     A declaration  that  a cooling tower is owned

                              or operated, and



                    402.2     The location of the cooling tower, and



                    402.3     A statement as to whether  or  not hexavalent

                              chromium  or  hexavalent chromium  containing

                              compounds is used  or was used in the cooling

                              tower, and



                    402.4     If hexavalent chromium or hexavalent chromium

                              containing compounds  are  used,  the date by

                              which such use will cease.



               403. Petition for Exemption, Wooden Cooling Towers  - Owners

                    or operators of cooling towers existing on May 7,  1991

                    with  wooden components that are exposed to circulating

                    water may  petition  the  APCO  for  exemption from the

                    Section 302 hexavalent chromium concentration  limit of

                    0.15  milligrams  per liter of circulating water for  a

                    period of up to six  months from the compliance date of

                    November 3, 1991. The  following  requirements  must be

                    met for the temporary exemption to be granted:



                    403.1     The District must be notified in writing that

                              the   cooling  tower  has  wooden  components

                              exposed to circulating water, and

                    403.2     The owner or operator complies with all other

                              requirements of this rule, and



                    403.3     The circulating water of the cooling tower is

                              tested in accordance with Section 502 monthly

                              and results are reported to the District.



                    403.4     Testing  shows  a  decrease in the hexavalent

                              chromium concentrations  in circulating water

                              each month.



                    403.5     Hexavalent    chromium   concentrations    in

                              circulating  water   shall   not   exceed   8

                              milligrams  hexavalent  chromium per liter of

                              circulating water.



               404. Petition   for   Exemption   From   Test  Requirements,

                    Discontinued Chromate Treatment - The  requirements  of

                    Section  502 apply to any person who owns or operates a

                    cooling tower existing on or prior to May 7, 1991, with

                    the following exception:



                    404.1     Hexavalent  chromium  has  not  been  used in

                              cooling  tower water treatment since November

                              3, 1990, or



                    404.2     Hexavalent  chromium  has  never been used in

                              water treatment for the cooling tower, and



                    404.3     Such hexavalent chromium cessation  of use or

                              non-use    is    demonstrated    by   written

                              certification,  signed by a company  officer,

                              that hexavalent chromium containing compounds

                              have not been used  in  the  year immediately

                              before  the  compliance  date  (November   3,

                              1991).



               405. New Cooling Tower Construction, Notification - No later

                    than  90 days prior to operation of a newly constructed

                    cooling  tower, the owner or operator shall provide the

                    following  information  in  writing  for  each  cooling

                    tower:



                    405.1     The name and address of the owner or operator

                              of the cooling tower, and

                    405.2     The location of the new cooling tower, and



                    405.3     The date that operation of the cooling  tower

                              is planned to commence.



          500. MONITORING AND RECORDS



               501. Determination  of  Hexavalent  Chromium  In Circulating

                    Water - Samples of circulating water shall  be analyzed

                    for  hexavalent  chromium  as  prescribed  by  American

                    Public  Health Method 312B or an equivalent method,  as

                    approved  by  the APCO, and the results reported to the

                    District  within   30  days  of  the  date  testing  is

                    conducted.



               502. Testing Requirements  - Unless a petition for exemption

                    from testing has been made to, and granted by, the APCO

                    in accordance with Section  403  prior  to  November 3,

                    1991,  testing  of the cooling tower circulating  water

                    shall be conducted and reported as specified in Section

                    501:



                    502.1     Frequency  of  Testing - At least one test of

                              cooling  tower circulating  water  hexavalent

                              chromium concentration shall be conducted and

                              the results reported to the District prior to

                              November 3, 1991:

                         a.   Additional  tests  shall be conducted and the

                              results reported every six months thereafter.

                         b.   If  a temporary exemption  from  Section  302

                              limitation  has  been  granted,  then testing

                              shall  be  conducted and reported monthly  in

                              accordance with Section 403 and Section 104.



                    502.2     Termination   of   Testing   -   The  testing

                              requirements of this rule for a cooling tower

                              end when two consecutive required  tests have

                              results  showing concentrations of hexavalent

                              chromium to  be less than 0.15 milligrams per

                              liter of circulating  water.  Testing  may be

                              required at any time by the District, if  the

                              District has information that the circulating

                              water may contain hexavalent chromium.



               503. Recordkeeping  - Any person subject to Sections 501 and

                    502  shall maintain  records  of  the  results  of  all

                    required  tests  of circulating water for two (2) years

                    and submit them to the District when requested.