mg/l (ppm).
2 Within the range 6 to 9.

(b) In-plant standards for cyanide are the same as the limitations specified in $ 437.11(b).

$ 437.13 Effluent limitations attainable

by the application of the best avail. able technology economically

achievable (BAT). (a) Except as provided in 40 CFR 125.30 through 125.32 or 437.10(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BAT: Limitations for antimony, arsenic, cadmium, chromium, cobalt, copper, lead, mercury, nickel, silver, tin, titanium, vanadium, and zinc are the same as the corresponding limitation specified in § 437.11(a).

(b) In-plant standards for cyanide are the same as the limitations specified in $ 437.11(b). [65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003)

8 437.15 Pretreatment standards for

existing sources (PSES). (a) Except as provided in 40 CFR 403.7, 403.13 or 437.10(b), and no later than December 22, 2003, any existing source subject to this subpart must achieve the following pretreatment standards: Standards for antimony, arsenic, cadmium, chromium, cobalt, copper, lead, mercury, nickel, silver, tin, titanium, vanadium, and zinc are the same as the corresponding limitation specified in § 437.11(a).

(b) In-plant standards for cyanide are the same as the limitations specified in $ 437.11(b).

Subpart B-Oils Treatment and

Recovery $ 437.20 Applicability.

(a) Except as provided in 8437.1(b), (C), or (d) or in paragraph (b) of this section, this subpart applies to that portion of the discharge of wastewater from a CWT facility that results from the treatment or recovery of oil from both oily wastes received from off-site and other CWT wastewater associated with the treatment of, or recovery of oily wastes.

(b) In order to ensure appropriate treatment rather than dilution of dissimilar wastes, an NPDES permit writer or control authority may require a new source or an existing source subject to this subpart to achieve alternative effluent limitations and standards, as defined in § 437.2(b), in the following circumstances:

(1) The facility receives, on a continuing basis, flows of process wastewater from five or fewer facilities subject to 40 CFR Subchapter N limitations and standards; and

(2) The process wastewater flows received for treatment at the facility have relatively consistent pollutant profiles.

mg/l (ppm). 2 Within the range 6 to 9.

[65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003]

8 437.22 Effluent limitations attainable

by the application of the best con

ventional pollutant control techExcept as provided in 40 CFR 125.30 through 125.32 or 437.20(b), any existing point source subject to this subpart must achieve the following effluent limitations attainable by the application of BCT: Limitations for O&G, PH, and TSS are the same as the corresponding limitation specified in § 437.21.

$437.21 Effluent limitations attainable

by the application of the best practicable control technology currently

available (BPT). Except as provided in 40 CFR 125.30 through 125.32 or 437.20(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:

$ 437.23 Effluent limitations attainable

by the application of the best available technology economically

achievable (BAT). Except as provided in 40 CFR 125.30 through 125.32 or 437.20(b), any existing point source subject to this subpart must achieve the following effluent limitations by the application of BAT: Limitations for arsenic, cadmium, chromium, cobalt, copper, lead, mercury, tin, zinc, butylbenzyl phthalate, carbazole, n-decane, bis(2-ethylhexyl) phthalate, fluoranthene, and n-octadecane are the same the responding limitation specified in $ 437.21. [65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003]

as

cor

Conventional Parameters

(b) In-plant standards for cyanide are the same as the limitations specified in § 437.11(b).

$ 437.13 Effluent limitations attainable

by the application of the best avail. able technology economically

achievable (BAT). (a) Except as provided in 40 CFR 125.30 through 125.32 or 437.10(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BAT: Limitations for antimony, arsenic, cadmium, chromium, cobalt, copper, lead, mercury, nickel, silver, tin, titanium, vanadium, and zinc are the same as the corresponding limitation specified in $ 437.11(a).

(b) In-plant standards for cyanide are the same as the limitations specified in $ 437.11(b). [65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003]

$ 437.15 Pretreatment standards for

existing sources (PSES). (a) Except as provided in 40 CFR 403.7, 403.13 or 437.10(b), and no later than December 22, 2003, any existing source subject to this subpart must achieve the following pretreatment standards: Standards for antimony, arsenic, cadmium, chromium, cobalt, copper, lead, mercury, nickel, silver, tin, titanium, vanadium, and zinc are the same as the corresponding limitation specified in $ 437.11(a).

(b) In-plant standards for cyanide are the same as the limitations specified in § 437.11(b). [65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003]

$ 437.16 Pretreatment standards for

new sources (PSNS). (a) Except as provided in 40 CFR 403.7 or 437.10(b), any new source subject to this subpart must achieve the following pretreatment standards: Standards for antimony, arsenic, cadmium, chromium, cobalt, copper, lead, mercury, nickel, silver, tin, titanium, vanadium, and zinc are the same as the corresponding limitation specified in $ 437.11(a)

50,2

Subpart B-Oils Treatment and

Recovery $ 437.20 Applicability.

(a) Except as provided in $ 437.1(b), (c), or (d) or in paragraph (b) of this section, this subpart applies to that portion of the discharge of wastewater from a CWT facility that results from the treatment or recovery of oil from both oily wastes received from off-site and other CWT wastewater associated with the treatment of, or recovery of oily wastes.

(b) In order to ensure appropriate treatment rather than dilution of dissimilar wastes, an NPDES permit writer or control authority may require a new source or an existing source subject to this subpart to achieve alternative effluent limitations and standards, as fined in $ 437.2(b), in the following circumstances:

(1) The facility receives, on a continuing basis, flows of process wastewater from five or fewer facilities subject to 40 CFR Subchapter N limitations and standards; and

(2) The process wastewater flows received for treatment at the facility have relatively consistent pollutant profiles.

mg/L (ppm). 2 Within the range 6 to 9.

[65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003)

$ 437.22 Effluent limitations attainable

by the application of the best conventional pollutant control tech

nology (BCI). Except as provided in 40 CFR 125.30 through 125.32 or 437.20(b), any existing point source subject to this subpart must achieve the following effluent limitations attainable by the application of BCT: Limitations for O&G, PH, and TSS are the same as the corresponding limitation specified in $ 437.21.

$ 437.21 Effluent limitations attainable

by the application of the best practicable control technology currently

available (BPT). Except as provided in 40 CFR 125.30 through 125.32 or 437.20(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:

8 437.23 Effluent limitations attainable

by the application of the best available technology economically

achievable (BAT). Except as provided in 40 CFR 125.30 through 125.32 or 437.20(b), any existing point source subject to this subpart must achieve the following effluent limitations by the application of BAT: Limitations for arsenic, cadmium, chromium, cobalt, copper, lead, mercury, tin, zinc, butylbenzyl phthalate, carbazole, n-decane, bis(2-ethylhexyl) phthalate, fluoranthene, and n-octadecane are the same

the corresponding limitation specified in $ 437.21. [65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003]

BPT LIMITATIONS

as

source

as the corresponding limitation specified in $ 437.21. [65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003)

8 437.24 New

performance standards (NSPS). Except as provided in $437.20(b), any new source subject to this subpart must achieve the following performance standards: Standards for oil and grease, pH, TSS, arsenic, cadmium, chromium, cobalt, copper, lead, mercury, tin, zinc, butylbenzyl phthalate, carbazole, n-decane, bis(2-ethylhexyl) phthalate, fluoranthene, and n-octadecane are the same as the corresponding limitation specified in $ 437.21.

[65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003)

$ 437.25 Pretreatment standards for

existing sources (PSES). Except as provided in 40 CFR 403.7, 403.13 or $ 437.20(b), and no later than December 22, 2003, any existing source subject to this subpart must achieve the following pretreatment standards:

Subpart C-Organics Treatment

and Recovery 8 437.30 Applicability.

(a) Except as provided in § 437.1(b), (c), or (d) or in paragraph (b) of this section, this subpart applies to that portion of the discharge of wastewater from a CWT facility that results from the treatment of, or recovery of organic material from both organic wastes received from off-site and other CWT wastewater associated with the treatment of, or recovery of organic wastes.

(b) In order to ensure appropriate treatment rather than dilution of dissimilar wastes, an NPDES permit writer or control authority may require a new source or an existing facility subject to $ 437.30 to achieve alternative effluent limitations and standards as defined in $437.2 (h) in the following circumstances:

(1) The facility receives, on a continuing basis, flows of process wastewater from five or fewer facilities subject to 40 CFR Subchapter N limitations and standards; and

(2) The process wastewater flows received for treatment at the facility have relatively consistent pollutant profiles.

8437.31 Effluent limitations attainable

by the application of the best practicable control technology currently

available (BPT). Except as provided in 40 CFR 125.30 through 125.32 or $437.30(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:

[65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003]

$ 437.26 Pretreatment standards for

new sources (PSNS). Except as provided in 40 CFR 403.7 or $ 437.20(b), any new source subject to this subpart must achieve the following pretreatment standards: Standards for chromium, cobalt, copper, lead, tin, zinc, carbazole, n-decane, bis(2-ethylhexyl) phthalate, fluoranthene, and n-octadecane are the same