Wis. Admin. Code Department of Natural Resources NR 254.122

Current through November 25, 2024
Section NR 254.122 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available

Except as provided in 40 CFR 125.30 to 125.32, any existing point source subject to this subchapter shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of BPT:

Table 197

Strip, Sheet, and Miscellaneous Products Galvanizing, Terne Coating, and Other Coatings

BPT Effluent Limitations

Maximum for any 1 day

Average of

daily values for

30 consecutive

days

Pollutant or pollutant property

kg/kkg (pounds per 1,000 pounds) of product

TSS

0.175

0.0751

O&G

0.0751

0.0250

Lead

0.00113

0.000376

Zinc

0.00150

0.000500

Hexavalent chro-mium(1)

0.000150

0.0000501

pH

(2)

(2)

(1) The limitations for hexavalent chromium apply to galvanizing operations which discharge wastewaters from the chromate rinse step.

(2) Within the range of 6.0 to 9.0

Table 198

Wire Products and Fasteners Galvanizing and Other Coatings

BPT Effluent Limitations

Maximum for any 1 day

Average of

daily values for

30 consecutive

days

Pollutant or pollutant property

kg/kkg (pounds per 1,000 pounds) of product

TSS

0.701

0.300

O&G

0.300

0.100

Lead

0.00451

0.00150

Zinc

0.00601

0.00200

Hexavalent chro-mium(1)

0.000600

0.000200

pH

(2)

(2)

(1) The limitations for hexavalent chromium apply to galvanizing operations which discharge wastewaters from the chromate rinse step.

(2) Within the range of 6.0 to 9.0

Fume Scrubbers

BPT Effluent Limitations

Maximum for any 1 day

Average of

daily values for

30 consecutive

days

Pollutant or pollutant property

kg per day for each fume scrubber

TSS

38.1

16.3

O&G

16.3

5.45

Lead

0.245

0.0819

Zinc

0.327

0.109

Hexavalent chro-mium(1)

0.0327

0.0109

pH

(2)

(2)

(1) The limitations for hexavalent chromium apply to galvanizing operations which discharge wastewaters from the chromate rinse step.

(2) Within the range of 6.0 to 9.0

Wis. Admin. Code Department of Natural Resources NR 254.122

Cr. Register, May, 1989, No. 401, eff. 6-1-89.