Wis. Admin. Code Department of Natural Resources NR 279.42

Current through October 28, 2024

Section NR 279.42 - 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 m³of feedstock)
Metric units (kilograms per 1,000 m³of feedstock)		BOD₅	50.6	25.8
TSS	35.6	22.7
COD¹	360.0	187.0
Oil and grease	16.2	8.5
Phenolic compounds	0.38	0.184
Ammonia as N	23.4	10.6
Sulfide	0.33	0.150
Total chromium	0.77	0.45
Hexavalent chromium	0.068	0.03
pH	(2)	(2)
English units (pounds per 1,000 bbl of feedstock)
BOD₅	17.9	9.1
TSS	12.5	8.0
COD¹	127.0	66.0
Oil and grease	5.7	3.0
Phenolic compounds	0.133	0.065
Ammonia as N	8.3	3.8
Sulfide	0.118	0.053
Total chromium	0.273	0.16
Hexavalent chromium	0.024	0.011
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	Size factor
Less than 49.9	0.71
50.0 to 74.9	0.74
75.0 to 99.9	0.81
100.0 to 124.9	0.88
125.0 to 149.9	0.97
150.0 to 174.9	1.05
175.0 to 199.9	1.14
200.0 or greater	1.19

(b) Process factor.

Process configuration	Process factor
Less than 6.49	0.81
6.5 to 7.49	0.88
7.5 to 7.99	1.0
8.0 to 8.49	1.09
8.5 to 8.99	1.19
9.0 to 9.49	1.29
9.5 to 9.99	1.41
10.0 to 10.49	1.53
10.5 to 10.99	1.67
11.0 to 11.49	1.82
11.5 to 11.99	1.98
12.0 to 12.49	2.15
12.5 to 12.99	2.34
13.0 or greater	2.44

(c) Example of the application of the above factors. Example - Lube refinery 125,000 bbl per steam day throughout.

Calculations of the Process Configuration

Process category	Process included	Weighting factor
Crude	Atm crude distillation	1
Vacuum, crude distillation
Desalting
Cracking and coking	Fluid cat. cracking	6
Visbreaking
Thermal cracking
Moving bed cat. cracking
Hydrocracking
Fluid coking
Delayed coking
Lube	Further defined in the development document	13
Asphalt	Asphalt production	12
Asphalt oxidation
Asphalt emulsifying

Process	Capacity (1,000 bbl per stream day)	Capacity relative to throughput	Weighting factor	Processing configuration
Crude:
Atm	125.0	1.0
Vacuum	60.0	0.48
Desalting	125.0	1.0
Total	2.48	x1	=2.48
Cracking:
FCC	41.0	0.328
Hydro-
cracking	20.0	0.16
Total	0.488	x6	=2.93
Lubes	5.3	0.042
4.0	0.032
4.9	0.039
Total	0.113	x13	=1.47
Asphalt	4.0	0.032	x12	=0.88
Refinery
process
configuration	=7.26

Notes: See table s. NR 279.42(2) (b) for process factor. Process factor = 0.88.

See Table s. NR 279.42(2) (a) for size factor for 125,000 bbl per stream day lube refinery. Size factor = 0.97.

To calculate the limits for each parameter, multiply the limit s. NR 279.42(1) by both the process factor and size factor. BOD5 limit (maximum for any 1 day) = 17.9 x 0.88 x 0.97 = 15.3 lb. per 1,000 bbl of feedstock.

(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 subcategory.

(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 (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 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	0.006	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 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 279.42

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