Wis. Admin. Code Department of Natural Resources NR 279.12

Current through October 28, 2024

Section NR 279.12 - 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)
Metric units (kilograms per 1,000 m³ of feedstock)		BOD5	22.7	12.0
TSS	15.8	10.1
COD¹	117.0	60.3
Oil and grease	6.9	3.7
Phenolic compounds	0.168	0.076
Ammonia as N	2.81	1.27
Sulfide	0.149	0.068
Total chromium	0.345	0.2
Hexavalent chromium	0.028	0.012
pH	(2)	(2)
English units (pounds per 1,000 bbl of feedstock)
BOD₅	8.0	4.25
TSS	5.6	3.6
COD¹	41.2	21.3
Oil and grease	2.5	1.3
Phenolic compounds	0.06	0.027
Ammonia as N	0.99	0.45
Sulfide	0.053	0.024
Total chromium	0.122	0.071
Hexavalent chromium	0.01	0.0044
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	1.02
25.0 to 49.9	1.06
50.0 to 74.9	1.16
75.0 to 99.9	1.26
100 to 124.9	1.38
125.0 to 149.9	1.5
150.0 or greater	1.57

(b) Process factor.

Process configuration	Process factor
Less than 2.49	0.62
2.5 to 3.49	0.67
3.5 to 4.49	0.8
4.5 to 5.49	0.95
5.5 to 5.99	1.07
6.0 to 6.49	1.17
6.5 to 6.99	1.27
7.0 to 7.49	1.39
7.5 to 7.99	1.51
8.0 to 8.49	1.64
8.5 to 8.99	1.79
9.0 to 9.49	1.95
9.5 to 9.99	2.12
10.0 to 10.49	2.31
10.5 to 10.99	2.51
11.0 to 11.49	2.73
11.5 to 11.99	2.98
12.0 to 12.49	3.24
12.5 to 12.99	3.53
13.0 to 13.49	3.84
13.5 to 13.99	4.18
14.0 or greater	4.36

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

(3) The following allocations constitute the quantity and quality of pollutants or pollutant properties controlled by this subsection and attributable to ballast, which may be discharged after the application of best practicable control technology currently available, by a point source subject to this subcategory, in addition to the discharge allowed by sub. (2). The allocation allowed for ballast water flow, as kg/cu m (lb/M gal), shall be based on those ballast waters treated at the refinery.

BPT Effluent Limitations for Ballast Water

Pollutant or pollutant property	Maximum for any 1 day	Average of daily values for 30 consecutive days
Metric units (kilograms per cubic meter of flow)
BOD₅	0.048	0.026
TSS	0.033	0.021
COD¹	0.47	0.24
Oil and grease	0.015	0.008
pH	(2)	(2)
English units (pounds per 1,000 gal of flow)
BOD₅	0.4	0.21
TSS	0.26	0.17
COD¹	3.9	2.0
Oil and grease	0.126	0.067
pH	(2)	(2)

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

² Within the range of 6.0 to 9.0.

(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) Effluent limitations for contaminated runoff. 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 (kilograms per 1,000 cubic meters 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 gal 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	0.006	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 BOD. 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 BOD.²

² Within the range 6.0 to 9.0.

Wis. Admin. Code Department of Natural Resources NR 279.12

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