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Federal regulations · Through 2026-08-25 · Newer source version available

40 CFR 437.45: New source performance standards (NSPS).

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Where this section sits in the code
  1. Title 40—Protection of Environment
  2. CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
  3. SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS
  4. PART 437—THE CENTRALIZED WASTE TREATMENT POINT SOURCE CATEGORY
  5. Subpart D—Multiple Wastestreams

(a) Except as provided in § 437.40(b), any new source subject to this subpart which combines treated or untreated wastes from subparts A, B, or C of this part may be subject to Multiple Wastestream Subcategory effluent limitations representing the application of NSPS set forth in paragraphs (b), (c), (d), or (e) of this section if the discharger agrees to the following conditions in its NPDES permit:

(1) The discharger will meet the applicable Multiple Wastestream Subcategory limitations set forth in paragraphs (b), (c), (d) or (e) of this section;

(2) The discharger will notify its NPDES permit writer at the time of submitting its application for permit, of its desire to be subject to the Multiple Waste Subcategory by submitting to the NPDES permit writer an initial certification statement as described in § 437.41(a);

(3) The discharger will submit to its NPDES permitting authority a periodic certification statement as described in § 437.41(b) once a year; and

(4) The discharger will maintain at the office of the facility and make available for inspection the on-site compliance paperwork as described in § 437.41(c).

(b) Combined waste receipts from subparts A, B and C of this part. (1) As provided in § 437.45(a), any new source subject to this paragraph must achieve the following performance standards:

Performance Standards

Regulated parameter Maximum daily 1 Maximum monthly avg. 1

Conventional Parameters

BOD 5 163 53.0

O&G 127 38.0

pH (2) (2)

TSS 29.6 11.3

Metal Parameters

Antimony 0.111 0.0312

Arsenic 0.0993 0.0199

Cadmium 0.0172 0.0102

Chromium 0.167 0.0522

Cobalt 0.182 0.0703

Copper 0.659 0.216

Lead 0.350 0.160

Mercury 0.000641 0.000246

Nickel 0.794 0.309

Selenium 0.176 0.0698

Silver 0.0318 0.0122

Tin 0.0955 0.0367

Titanium 0.0159 0.00612

Vanadium 0.0628 0.0518

Zinc 0.657 0.252

Organic Parameters

Acetone 30.2 7.97

Acetophenone 0.114 0.0562

Bis(2-ethylhexyl) phthalate 0.215 0.101

2-Butanone 4.81 1.85

Butylbenzyl phthalate 0.188 0.0887

Carbazole 0.598 0.276

o-Cresol 1.92 0.561

p-Cresol 0.698 0.205

n-Decane 0.948 0.437

Fluoranthene 0.0537 0.0268

n-Octadecane 0.589 0.302

Phenol 3.65 1.08

Pyridine 0.370 0.182

2,4,6-Trichlorophenol 0.155 0.106

1 mg/L (ppm).

2 Within the range 6 to 9.

(2) The following in-plant limitations apply to metal-bearing wastewater containing cyanide:

In-Plant Limitations

Regulated parameter Maximum daily 1 Maximum monthly avg. 1

Cyanide 500 178

1 mg/L (ppm).

(c) Combined waste receipts from subparts A and B of this part. (1) As provided in § 437.45(a), any new source subject to this paragraph must achieve the following standards:

Performance Standards

Regulated parameter Maximum daily 1 Maximum monthly avg. 1

Conventional Parameters

O&G 127 38.0

pH (2) (2)

TSS 29.6 11.3

Metal Parameters

Antimony 0.111 0.0312

Arsenic 0.0993 0.0199

Cadmium 0.0172 0.0102

Chromium 0.167 0.0522

Cobalt 0.182 0.0703

Copper 0.659 0.216

Lead 0.350 0.160

Mercury 0.000641 0.000246

Nickel 0.794 0.309

Selenium 0.176 0.0698

Silver 0.0318 0.0122

Tin 0.0955 0.0367

Titanium 0.0159 0.00612

Vanadium 0.0628 0.0518

Zinc 0.657 0.252

Organic Parameters

Bis(2-ethylhexyl) phthalate 0.215 0.101

Butylbenzyl phthalate 0.188 0.0887

Carbazole 0.598 0.276

n-Decane 0.948 0.437

Fluoranthene 0.0537 0.0268

n-Octadecane 0.589 0.302

1 mg/L (ppm).

2 Within the range 6 to 9.

(2) The following in-plant limitations apply to metal-bearing wastewater containing cyanide:

In-Plant Limitations

Regulated parameter Maximum daily 1 Maximum monthly avg. 1

Cyanide 500 178

1 1 mg/L (ppm).

(d) Combined waste receipts from subparts A and C of this part. (1) As provided in § 437.45(a), any new source subject to this paragraph must achieve the following performance standards:

Performance Standards

Regulated parameter Maximum daily 1 Maximum monthly avg. 1

Conventional Parameters

BOD5 163 53.0

O&G 205 50.2

pH (2) (2)

TSS 29.6 11.3

Metal Parameters

Antimony 0.111 0.0312

Arsenic 0.0993 0.0199

Cadmium 0.782 0.163

Chromium 0.167 0.0522

Cobalt 0.182 0.0703

Copper 0.659 0.216

Lead 1.32 0.283

Mercury 0.000641 0.000246

Nickel 0.794 0.309

Selenium 0.176 0.0698

Silver 0.0318 0.0122

Tin 0.0955 0.0367

Titanium 0.0159 0.00612

Vanadium 0.0628 0.0518

Zinc 0.657 0.252

Organic Parameters

Acetone 30.2 7.97

Acetophenone 0.114 0.0562

2-Butanone 4.81 1.85

o-Cresol 1.92 0.561

p-Cresol 0.698 0.205

Phenol 3.65 1.08

Pyridine 0.370 0.182

2,4,6-Trichlorophenol 0.155 0.106

1 mg/L (ppm).

2 Within the range 6 to 9.

(2) The following in-plant limitations apply to metal-bearing wastewater containing cyanide:

In-Plant Limitations

Regulated parameter Maximum daily 1 Maximum monthly avg.1

Cyanide 500 178

1 mg/L (ppm).

(e) Combined waste receipts from subparts B and C of this part. As provided in § 437.45(a), any new source subject to this paragraph must achieve the following performance standards:

Performance Standards

Regulated parameter Maximum daily 1 Maximum monthly avg. 1

Conventional Parameters

BOD5 163 53.0

O&G 127 38.0

pH (2) (2)

TSS 74.1 30.6

Metal Parameters

Arsenic 2.95 1.33

Cadmium 0.0172 0.0102

Chromium 0.746 0.323

Cobalt 56.4 18.8

Copper 0.500 0.242

Lead 0.350 0.160

Mercury 0.0172 0.00647

Tin 0.335 0.165

Zinc 0.497 0.420

Organic Parameters

Acetone 30.2 7.97

Acetophenone 0.114 0.0562

Bis(2-ethylhexyl) phthalate 0.215 0.101

2-Butanone 4.81 1.85

Butylbenzyl phthalate 0.188 0.0887

Carbazole 0.598 0.276

o-Cresol 1.92 0.561

p-Cresol 0.698 0.205

n-Decane 0.948 0.437

Fluoranthene 0.0537 0.0268

n-Octadecane 0.589 0.302

Phenol 3.65 1.08

Pyridine 0.370 0.182

2,4,6-Trichlorophenol 0.155 0.106

1 mg/L (ppm).

2 Within the range 6 to 9.

Collected 2026-08-27T02:26:04Z. Source file · JSON

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