Note: This article has been updated:
Final Arkansas ADEQ Industrial Storm Water Permit
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The Arkansas Department of Environmental Quality (ADEQ) has proposed a revised industrial stormwater permit. The permit is open for public comment until May 11, 2009.
The proposed permit includes stormwater quality benchmarks which apply to all permitted facilities, and additional benchmarks that apply to specific industrial sectors (see below).
[Read more about stormwater benchmarks]
[Read more about how benchmarks compare to typical stormwater discharge quality]
Benchmarks being proposed were derived from a wide range of sources, including:
EPA Ambient Water Quality Criteria - Acute Values
EPA Ambient Water Quality Criteria - Chronic Values
EPA Ambient Water Quality Criteria - Lowest Observed Effect Levels (LOEL) Acute Values
EPA Ambient Water Quality Criteria - Human Health Criteria for Consumption of Water and Organisms.
North Carolina State Benchmark Values
Colorado State Water Quality Standards
National Urban Runoff Program (NURP) median concentration
Median concentration of Stormwater Effluent Limitation Guideline (40 CFR Part 419)
Laboratory derived Minimum Level (ML) and Method Detection Level (MDL).
The benchmarks being proposed under the ADEQ NPDES permit are:
All permitted facilities:
pH 6.0 - 9.0 s.u.
Chemical Oxygen Demand (COD) 120
Total Suspended Solids (TSS) 100
Oil & Grease 15
In addition to the above benchmarks, the following effluent characteristics must also be monitored for individual industrial sectors.
SECTOR A: TIMBER PRODUCTS
General Sawmills and Planing Mills (SIC 2421)
Total Zinc 0.6840 mg/L
Wood Preserving (SIC 2491)
Total Arsenic 0.16854 mg/L
Total Copper 0.0756 mg/L
SECTOR C: CHEMICALS AND ALLIED PRODUCTS
Agricultural Chemicals (SIC 2873-2879)
Nitrate plus Nitrite Nitrogen 0.68 mg/L
Phosphorus 2.0 mg/L
Total Lead 0.5188 mg/L
Total Iron 1.0 mg/L
Total Zinc 0.6840 mg/L
Industrial Inorganic Chemicals (SIC 2812-2819)
Total Aluminum 0.75 mg/L
Total Iron 1.0 mg/L
Nitrate plus Nitrite Nitrogen 0.68 mg/L
Soaps, Detergents, Cosmetics, and Perfumes (SIC 2841-2844)
Total Zinc 0.6840 mg/L
Nitrate plus Nitrite Nitrogen 0.68 mg/L
Plastics, Synthetics, and Resins (SIC 2821-2824)
Total Zinc 0.6840 mg/L
SECTOR E: GLASS, CLAY, CEMENT, CONCRETE, AND GYPSUM PRODUCTS
Clay Product Manufacturers (SIC 3251- 3259, 3261-3269)
Total Aluminum 0.75 mg/L
Concrete and Gypsum Product Manufacturers (SIC 3271-3275)
Total Iron 1.0 mg/L
SECTOR F: PRIMARY METALS
Steel Works, Blast Furnaces, and Rolling and Finishing Mills (SIC 3312-3317)
Total Zinc 0.6840 mg/L
Total Aluminum 0.75 mg/L
Iron and Steel Foundries (SIC 3321-3325)
Total Zinc 0.6840 mg/L
Total Aluminum 0.75 mg/L
Total Copper 0.0756 mg/L
Total Iron 1.0 mg/L
Rolling, Drawing, and Extruding of Nonferrous Metals (SIC 3351-3357)
Total Zinc 0.6840 mg/L
Total Copper 0.0756 mg/L
Nonferrous Foundries (SIC 3363-3369)
Total Zinc 0.6840 mg/L
Total Copper 0.0756 mg/L
SECTOR G: METAL MINING (ORE MINING AND DRESSING)
Active Copper Ore Mining and Dressing Facilities (SIC 1021)
Nitrate plus Nitrite Nitrogen 0.68 mg/L
Iron Ores; Copper Ores; Lead and Zinc Ores; Gold and Silver Ores; Ferroalloy Ores, Except Vanadium; and Miscellaneous Metal Ores (SIC Codes 1011, 1021, 1031, 1041, 1044, 1061,
1081, 1094, 1099)
Total Antimony 0.636 mg/L
Total Arsenic 0.16854 mg/ L
Total Beryllium 0.13 mg/L
Total Cadmium 0.0118 mg/L
Total Copper 0.0756 mg/L
Total Iron 1.0 mg/L
Total Lead 0.5188 mg/L
Total Mercury 0.0024 mg/L
Total Nickel 6.43 mg/L
Total Selenium 0.2385 mg/L
Total Silver 0.0107 mg/L
Total Zinc 0.6840 mg/L
SECTOR H: COAL MINES AND COAL MINING-RELATED FACILITIES
Coal Mines and Related Areas (SIC 1221-1241)
Total Aluminum 0.75 mg/L
Total Iron 1.0 mg/L
SECTOR J: MINERAL MINING AND DRESSING
Sand and Gravel Mining (SIC 1442, 1446)
Nitrate plus Nitrite Nitrogen 0.68 mg/L
SECTOR K: HAZARDOUS WASTE TREATMENT, STORAGE, OR DISPOSAL FACILITIES
Ammonia 19 mg/L
Total Magnesium 0.0636 mg/L
Total Arsenic 0.15 mg/L
Total Cadmium 0.0118 mg/L
Total Cyanide 0.0636 mg/ L
Total Lead 0.5188 mg/L
Total Mercury 0.0024 mg/ L
Total Selenium 0.2385 mg/L
Total Silver 0.0107 mg/L
SECTOR L: LANDFILLS, LAND APPLICATION SITES, AND OPEN DUMPS
Total Iron 1.0 mg/L
SECTOR M: AUTOMOBILE SALVAGE YARDS
Automobile Salvage Yards (SIC 5015)
Total Aluminum 0.75 mg/L
Total Iron 1.0 mg/L
Total Lead 0.5188 mg/L
SECTOR N: SCRAP RECYCLING FACILITIES
Scrap Recycling and Waste Recycling Facilities (SIC 5093)
Total Aluminum 0.75 mg/L
Total Copper 0.0756 mg/L
Total Iron 1.0 mg/L
Total Lead 0.5188 mg/L
Total Zinc 0.6840 mg/L
SECTOR O: STEAM ELECTRIC GENERATING FACILITIES
Total Iron 1.0 mg/L
SECTOR Q: WATER TRANSPORTATION
Water Transportation Facilities (SIC 4412-4499)
Total Aluminum 0.75 mg/L
Total Iron 1.0 mg/L
Total Lead 0.5188 mg/L
Total Zinc 0.6840 mg/L
SECTOR S: AIR TRANSPORTATION FACILITIES
Airports (SIC 4512-4581).
Ammonia 19 mg/L
SECTOR U: FOOD AND KINDRED PRODUCTS
Fats and Oils Products (SIC 2074-2079)
Nitrate plus Nitrite Nitrogen 0.68 mg/L
SECTOR Y: RUBBER, MISCELLANEOUS PLASTIC PRODUCTS, AND MISCELLANEOUS MANUFACTURING INDUSTRIES
Rubber Products Manufacturing (SIC 3011, 3021, 3052, 3053, 3061, 3069)
Total Zinc 0.6840 mg/L
SECTOR AA: FABRICATED METAL PRODUCTS
Fabricated Metal Products, except Coating (SIC 3411-3499; 3911-3915)
Total Aluminum 0.75 mg/L
Total Iron 1.0 mg/L
Total Zinc 0.6840 mg/L
Nitrate plus Nitrite Nitrogen 0.68 mg/L
Fabricated Metal Coating and Engraving (SIC 3479)
Nitrate plus Nitrite Nitrogen 0.68 mg/L
Total Zinc 0.6840 mg/L
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