Performance Standards and pretreatment Standards

Table 7.8 indicates that the major regulated parameters for pretreatment of coil coating industrial wastewater are chromium, cyanide, zinc, total toxic organics (TTO), oil and grease, manganese, fluoride, phosphorus, and copper. The effluent limitations of all coil coating operations represent the following:

1. The degree of effluent reduction attainable by the application of the BPT currently available

2. The degree of effluent reduction attainable by the application of the BAT economically achievable, which can be found from the U.S. Code of Federal Register 40CFR-Chapter I, Part 465, Coil Coating Point Source Category4

Also documented in this chapter for reference by the readers are the latest U.S. performance standards and pretreatment standards of four subcategories:

1. Steel basis material

2. Galvanized basis material

3. Aluminum basis material

4. Canmaking

7.11.1 Effluent Limitations, Performance Standards, and Pretreatment Standards of the Steel Basis Material Subcategory

Table 7.20 shows the effluent limitations of the steel basis material subcategory that represents the degree of effluent reduction attainable by the application of the BPT currently available. Table 7.21

TABLE 7.20

The Effluent Limitations of the Steel Basis Material Subcategory that Represent the Degree of Effluent Reduction Attainable by the Application of the BPT Currently Available

BPT Effluent Limitations [mg/m2 (lb/106 ft2) of Area Processed] Pollutant or Pollutant ___-_'_

Property

Maximum for Any 1 Day

Maximum for Monthly Average

Chromium

1.16

(0.24)

0.47

(0.096)

Cyanide

0.80

(0.17)

0.33

(0.068)

Zinc

3.66

(0.75)

1.54

(0.32)

Iron

3.39

(0.70)

1.74

(0.36)

Oil and grease

55.1

(11.3)

33.1

(6.77)

TSS

113.0

(23.1)

55.1

(11.3)

pH

7.5-10.0a

7.5-10.0a

7.5-10.0a

The Effluent Limitations of the Steel Basis Material Subcategory that Represent the Degree of Effluent Reduction Attainable by the Application of the BAT Economically Achievable

BPT Effluent Limitations [mg/m2 (lb/106 ft2) of Area Processed]

TABLE 7.21

The Effluent Limitations of the Steel Basis Material Subcategory that Represent the Degree of Effluent Reduction Attainable by the Application of the BAT Economically Achievable

BPT Effluent Limitations [mg/m2 (lb/106 ft2) of Area Processed]

Pollutant or Pollutant Property

Maximum for Any 1 Day

Maximum for Monthly Average

Chromium

0.50

(0.10)

0.20

(0.041)

Cyanide

0.34

(0.07)

0.14

(0.029)

Zinc

1.56

(0.32)

0.66

(0.14)

Iron

1.45

(0.30)

0.74

(0.15)

Source: U.S. EPA. Code of Federal Regulations (CFR). Title 40 Protection of Environment. Part 465. Coil Coating Point

Source Category. Washington, DC, 2008.

Source Category. Washington, DC, 2008.

shows the effluent limitations of the steel basis material subcategory that represents the degree of effluent reduction attainable by the application of the BAT economically achievable. Table 7.22 lists the new source performance standards of the steel basis material subcategory that establish the quantity or quality of pollutants or pollutant properties. Table 7.23 lists the pretreatment standards for existing sources of the steel basis material subcategory effluents. Table 7.24 lists the pretreat-ment standards for new sources of the steel basis material subcategory effluents.

7.11.2 Effluent Limitations and Performance Standards of the Galvanized Basis Material Subcategory

Table 7.25 shows the effluent limitations of the galvanized basis material subcategory that represents the degree of effluent reduction attainable by the application of the BPT currently available. Table 7.26 shows the effluent limitations of the galvanized basis material subcategory that represents the degree of effluent reduction attainable by the application of the BAT economically achievable.

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