[Code of Federal Regulations]
[Title 40, Volume 27]
[Revised as ofJuly 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR435.43]

[Page 342-343]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 435--OIL AND GAS EXTRACTION POINT SOURCE CATEGORY--Table of Contents
 
                     Subpart D--Coastal Subcategory
 
Sec. 435.43  Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology 
          economically achievable (BAT).

    Except as provided in 40 CFR 125.30-125.32, any existing point 
source subject to this Subpart must achieve the following effluent 
limitations representing the degree of effluent reduction attainable by 
the application of the best available technology economically achievable 
(BAT):

                                            BAT Effluent Limitations
----------------------------------------------------------------------------------------------------------------
                 Stream                            Pollutant parameter               BAT effluent limitations
----------------------------------------------------------------------------------------------------------------
Produced Water:
    (A) All coastal areas except Cook     .....................................  No discharge.
     Inlet.
    (B) Cook Inlet......................  Oil & Grease.........................  The maximum for any one day
                                                                                  shall not exceed 42 mg/l, and
                                                                                  the 30-day average shall not
                                                                                  exceed 29 mg/l.
Drilling Fluids, Drill Cuttings, and
 Dewatering Effluent: \1\
    (A) All coastal areas except Cook     .....................................  No discharge.
     Inlet.
    (B) Cook Inlet:.....................
      Water-based drilling fluids, drill  SPP Toxicity.........................  Minimum 96-hour LC50 of the SPP
       cuttings, and dewatering effluent.                                         Toxicity Test 4 shall be 3% by
                                                                                  volume.
                                          Free oil.............................  No discharge.\2\

[[Page 343]]


                                          Diesel oil...........................  No discharge.
                                          Mercury..............................  1 mg/kg dry weight maximum in
                                                                                  the stock barite.
                                          Cadmium..............................  3 mg/kg dry weight maximum in
                                                                                  the stock barite.
      Non-aqueous drilling fluids and     .....................................  No discharge.
       dewatering effluent.
      Drill cuttings associated with non- .....................................  No discharge.\5\
       aqueous drilling fluids.
Well Treatment, Workover and Completion
 Fluids:
    (A) All coastal areas except Cook     .....................................  No discharge.
     Inlet.
    (B) Cook Inlet......................  Oil & Grease.........................  The maximum for any one day
                                                                                  shall not exceed 42 mg/l, and
                                                                                  the 30-day average shall not
                                                                                  exceed 29 mg/l.
Produced Sand...........................  .....................................  No discharge.
Deck Drainage...........................  Free Oil \3\.........................  No discharge.
Domestic Waste..........................  Foam.................................  No discharge.
----------------------------------------------------------------------------------------------------------------
\1\ BAT limitations for dewatering effluent are applicable prospectively, BAT limitations in this rule are not
  applicable to discharges of dewatering effluent from reserve pits which as of the effective date of this rule
  no longer receive drilling fluids and drill cuttings. Limitations on such discharges shall be determined by
  the NPDES permit issuing authority.
\2\ As determined by the static sheen test (see appendix 1 to 40 CFR Part 435, subpart A).
\3\ As determined by the presence of a film or sheen upon or a discoloration of the surface of the receiving
  water (visual sheen).
\4\ As determined by the suspended particulate phase (SPP) toxicity test (see Appendix 2 of Subpart A of this
  part).
\5\ When Cook Inlet operators cannot comply with this no discharge requirement due to technical limitations (see
  Appendix 1 of Subpart D of this part), Cook Inlet operators shall meet the same stock limitations (C16-C18
  internal olefin) and discharge limitations for drill cuttings associated with non-aqueous drilling fluids for
  operators in Offshore waters (see Sec.  435.13) in order to discharge drill cuttings associated with non-
  aqueous drilling fluids.


[61 FR 66125, Dec. 16, 1996; 62 FR 1681, Jan. 13, 1997, as amended at 66 
FR 6917, Jan. 22, 2001]