Statutes, codes, and regulations
Wisconsin Administrative Code
Agency - Department of Natural ResourcesEnvironmental Protection - Wisconsin Pollutant Discharge Elimination System
Chapter NR 279 - Petroleum refining
Section NR 279.32 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT)

Wis. Admin. Code Department of Natural Resources NR 279.32

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Current through November 25, 2024
Section NR 279.32 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT)
(1) Except as provided in 40 CFR 125.30- 125.32, any existing point source subject to this subcategory shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):

BPT effluent limitations

Pollutant or pollutant property

Maximum for any 1 day

Average of daily values for 30 consecutive days

Metric units (kilograms per 1,000 m3 of feedstock)

BOD5

34.6

18.4

TSS

23.4

14.8

COD1

210.0

109.0

Oil and grease

11.1

5.9

Phenolic compounds

0.25

0.12

Ammonia as N

23.4

10.6

Sulfide

0.22

0.099

Total chromium

0.52

0.3

Hexavalent chromium

0.046

0.02

pH

(2)

(2)

English units (pounds per 1,000 bbl of feedstock)

BOD5

12.1

6.5

TSS

8.3

5.25

COD1

74.0

38.4

Oil and grease

3.9

2.1

Phenolic compounds

0.088

0.0425

Ammonia as N

8.25

3.8

Sulfide

0.078

0.035

Total chromium

0.183

0.107

Hexavalent chromium

0.016

0.0072

pH

(2)

(2)

1 See footnote following table in s. NR 279.13(4).

2 Within the range of 6.0 to 9.0

(2) The limits set forth in sub. (1) shall be multiplied by the following factors to calculate the maximum for any one day and maximum average of daily values for 30 consecutive days.
(a) Size factor.

1000 bbl. of feedstock per stream day

Size factor

Less than 24.9

0.73

25.0 to 49.9

0.76

50.0 to 74.9

0.83

75.0 to 99.9

0.91

100.0 to 124.9

0.99

125.0 to 149.9

1.08

150.0 or greater

1.13

(b) Process factor.

Process configuration

Process factor

Less than 4.49

0.73

4.5 to 5.49

0.80

5.5 to 5.99

0.91

6.0 to 6.49

0.99

6.5 to 6.99

1.08

7.0 to 7.49

1.17

7.5 to 7.99

1.28

8.0 to 8.49

1.39

8.5 to 8.99

1.51

9.0 to 9.49

1.65

9.5 or greater

1.72

Note: See the comprehensive example in s. NR 279.42(2) (c).

(3) The provisions of s. NR 279.12(3) apply to discharges of process wastewater pollutants attributable to ballast water by a point source subject to the provisions of this subchapter.
(4) The quantity and quality of pollutants or pollutant properties controlled by this subsection, attributable to once-through cooling water, are excluded from the discharge allowed by sub. (2). Once-through cooling water may be discharged with a total organic carbon concentration not to exceed 5 mg/l.
(5) The following effluent limitations constitute the quantity and quality of pollutants or pollutant properties controlled by this subsection and attributable to contaminated runoff, which may be discharged after the application of the best practicable control technology currently available by a point source subject to this subcategory.
(a) If wastewater consists solely of contaminated runoff and is not commingled or treated with process wastewater, it may be discharged if it does not exceed 15 mg/l oil and grease and 110 mg/l total organic carbon (TOC) based upon an analysis of any single grab or composite sample.
(b) If contaminated runoff is commingled or treated with process wastewater, or if wastewater consisting solely of contaminated runoff which exceeds 15 mg/l oil and grease or 110 mg/l TOC is not commingled or treated with any other type of wastewater, the quantity of pollutants discharged may not exceed the quantity determined by multiplying the flow of contaminated runoff as determined by the department times the concentrations listed in the following table:

BPT effluent limitations

Pollutant or pollutant property

Maximum for any 1 day

Average of daily values for 30 consecutive days

Metric units (kilogr meters

ams per 1,000 cubic of flow)

BOD5

48.0

26.0

TSS

33.0

21.0

COD1

360.0

180.0

Oil and grease

15.0

8.0

Phenolic compounds (4AAP)

0.35

0.17

Total chromium

0.73

0.43

Hexavalent chromium

0.062

0.028

pH

(2)

(2)

English units (pounds per 1,000 gallons of flow)

BOD5

0.4

0.22

TSS

0.28

0.18

COD1

3.0

1.5

Oil and grease

0.13

0.067

Phenolic compounds (4AAP)

0.0029

0.0014

Total chromium

0.0060

0.0035

Hexavalent chromium

0.00052

0.00023

pH

(2)

(2)

1 In any case in which the applicant can demonstrate that the chloride ion concentration in the effluent exceeds 1,000 mg/l (1,000 ppm), the department may substitute TOC as a parameter in lieu of COD. A TOC effluent limitation shall be based on effluent data from the particular refinery which correlates TOC to BOD5. If in the judgment of the department, adequate correlation data are not available, the effluent limitations for TOC shall be established at a ratio of 2.2 to 1 to the applicable effluent limitations for BOD5.

2 Within the range 6.0 to 9.0.

Wis. Admin. Code Department of Natural Resources NR 279.32

Cr. Register, October, 1986, No. 370, eff. 11-1-86.