Virginia Administrative Code
Title 9 - ENVIRONMENT
Agency 25 - STATE WATER CONTROL BOARD
Chapter 151 - VIRGINIA POLLUTANT DISCHARGE ELIMINATION SYSTEM (VPDES) GENERAL PERMIT REGULATION FOR DISCHARGES OF STORMWATER ASSOCIATED WITH INDUSTRIAL ACTIVITY
Part IV - Sector Specific Permit Requirements
Section 9VAC25-151-110 - Sector C - Chemical and allied products manufacturing
Current through Register Vol. 41, No. 3, September 23, 2024
A. Discharges covered under this section. The requirements listed under this section apply to stormwater discharges associated with industrial activity from facilities engaged in manufacturing the following products and generally described by the SIC code shown:
B. Numeric effluent limitations. The following numeric effluent limitations shall be met by existing and new discharges with phosphate fertilizer manufacturing runoff. The provisions of this subsection are applicable to stormwater discharges from the phosphate subcategory of the fertilizer manufacturing point source category (40 CFR 418.10). The term contaminated stormwater runoff shall mean precipitation runoff that during manufacturing or processing comes into contact with any raw materials, intermediate product, finished product, byproducts, or waste product. The concentration of pollutants in stormwater discharges shall not exceed the effluent limitations in Table 110-1.
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Table 110-1 Sector C - Numeric Effluent Limitations |
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Parameter |
Effluent Limitations |
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Daily Maximum |
30-day Average |
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Phosphate Subcategory of the Fertilizer Manufacturing Point Source Category (40 CFR 418.10) - applies to precipitation runoff that, during manufacturing or processing, comes into contact with any raw materials, intermediate product, finished product, byproducts, or waste product (SIC Code 2874) |
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Total Phosphorus (as P) |
105 mg/L |
35 mg/L |
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Fluoride |
75 mg/L |
25 mg/L |
C. Benchmark monitoring and reporting requirements. Agricultural chemical manufacturing facilities; industrial inorganic chemical facilities; soaps, detergents, cosmetics, and perfume manufacturing facilities; and plastics, synthetics, and resin manufacturing facilities are required to monitor their stormwater discharges for the pollutants of concern listed in Table 110-2.
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Table 110-2 Sector C - Benchmark Monitoring Requirements |
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Pollutants of Concern |
Benchmark Concentration |
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Agricultural Chemicals (SIC Codes 2873-2879) |
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Total Nitrogen |
2.2 mg/L |
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Total Recoverable Zinc |
120 µg/L |
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Total Phosphorus |
2.0 mg/L |
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Industrial Inorganic Chemicals (SIC Codes 2812-2819) |
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Total Recoverable Aluminum |
1,100 µg/L |
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Total Nitrogen |
2.2 mg/L |
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Soaps, Detergents, Cosmetics, and Perfumes (SIC Codes 2841-2844) |
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Total Nitrogen |
2.2 mg/L |
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Total Recoverable Zinc |
120 µg/L |
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Plastics, Synthetics, and Resins (SIC Codes 2821-2824) |
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Total Recoverable Zinc |
120 µg/L |
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Composting Facilities (SIC Code 2875) |
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Total Suspended Solids (TSS) |
100 mg/L |
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Biochemical Oxygen Demand (BOD5) |
30 mg/L |
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Chemical Oxygen Demand (COD) |
120 mg/L |
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Ammonia |
2.14 mg/L |
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Total Nitrogen |
2.2 mg/L |
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Total Phosphorus |
2.0 mg/L |
Statutory Authority: § 62.1-44.15 of the Code of Virginia; § 402 of the Clean Water Act; 40 CFR Parts 122, 123, and 124.
