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Home My WebLink AboutDWQ-2023-200047APPENDIX I.C - Storm Water Discharges Associated with Industrial Activity from Chemical and Allied Products Manufacturing and Refining Facilities Coverage of This Section. Discharges Covered Under This Section. The requirements listed under this Part shall apply to storm water discharges from the following activities: Table I.C.1 – Sector C: Chemical and Allied Products Manufacturing and Refining SIC Code Activity Represented 2812 – 2879 Industrial Inorganic Chemicals 2821 – 2824 Plastics Materials and Synthetic Resins, Synthetic Rubber, Cellulosic and Other Manmade Fibers Except Glass 2833 – 2836 Medicinal Chemicals and Botanical Products; Pharmaceutical Preparations; in vitro and in vivo Diagnostic Substances; and Biological Products, Except Diagnostic Substances 2841 – 2844 Soaps, Detergents, and Cleaning Preparations; Perfumes, Cosmetics, and Other Toilet Preparations 2851 Paints, Varnishes, Lacquers, Enamels, and Allied Products 2861 – 2869 Industrial Organic Chemicals 2873 – 2879 Agricultural Chemicals 2891 – 2899 Miscellaneous Chemical Products 2911 Petroleum Refining 3952 (limited to inks and paints listed) Inks and Paints, Including China Painting Enamels, India Ink, Drawing Ink, Platinum Paints for Burnt Wood or Leather Work, Paints for China Painting, Artist’s Paints and Artist’s Watercolors Sector Specific Limitations on Coverage. There are no additional limitations on coverage other than those listed in Part I.C. Sector Specific Prohibition of Non-Stormwater Discharges. In addition to those non-storm water discharges prohibited under Part I.D.2, this permit does not authorize the discharge of: Inks, paints, or substances (hazardous, nonhazardous, etc.) resulting from an onsite spill, including materials collected in drip pans; Wash water from material handling and processing areas. This includes areas where containers, equipment, industrial machinery, and any significant materials are exposed to storm water; and Wash water from drum, tank, or container rinsing and cleaning. The operators of such discharges must obtain coverage under a separate UPDES wastewater discharge permit. Sector Specific Control Measures and Effluent Limits. There are no additional control measures and effluent limits beyond those in Part III of this permit. Sector Specific Inspection Requirements. There are no additional inspection requirements beyond those in Part IV.A of this permit. Sector Specific Plan Requirements. There are no additional Plan requirements beyond those in Part VII.D of this permit. Monitoring Requirements. Analytical Benchmark Monitoring. The following analytical benchmark monitoring parameters shall apply specifically to sector C facilities. Parameters found in this Part apply to both primary industrial activities and any co-located industrial activities. The facility may be subject to the requirements of more than one of the following: Table I.C.2 – Analytical Benchmark Monitoring Parameters for Industrial Inorganic Chemicals (SIC 2812 – 2819) Parameter Benchmark Monitoring Concentration Total Recoverable Aluminum 1.1 mg/L Nitrate plus Nitrite Nitrogen 0.68 mg/L Table I.C.3 – Analytical Benchmark Monitoring Parameters for Plastics, Synthetics, and Resins (SIC 2821 – 2824) Parameter Benchmark Monitoring Concentration Total Recoverable Zinc (freshwater) Hardness Dependent 1 Total Recoverable Zinc (saltwater)2 0.090 mg/L The freshwater analytical benchmark monitoring values of some metals are dependent on water hardness. For these parameters, permittees must determine the hardness of the receiving water to identify the applicable ‘hardness range’ for determining the analytical benchmark monitoring value applicable to the facility. Hardness dependent analytical benchmark monitoring shall follow the table below: Freshwater Hardness Range Zinc (mg/L) 0.00 – 24.99 mg/L 0.037 25 – 24.99 mg/L 0.052 50 – 74.99 mg/L 0.080 75 – 99.99 mg/L 0.107 100 – 124.99 mg/L 0.132 125 – 149.99 mg/L 0.157 150 – 174.99 mg/L 0.181 175 – 199.99 mg/L 0.204 200 – 224.99 mg/L 0.227 225 – 249.99 mg/L 0.249 250+ mg/L 0.260 If hardness cannot be determined (groundwater or inaccessible waterbodies), use the most conservative values (0-24.99 mg/L range). Saltwater benchmark values apply to stormwater discharges into saline waters where indicated. Table I.C.4 – Analytical Benchmark Monitoring Parameters for Soaps, Detergents, Cosmetics, and Perfumes (SIC 2841 – 2844) Parameter Benchmark Monitoring Concentration Nitrate plus Nitrite Nitrogen 0.68 mg/L Total Recoverable Zinc (freshwater) Hardness Dependent 1 Total Recoverable Zinc (saltwater) 2 0.090 mg/L The freshwater analytical benchmark monitoring values of some metals are dependent on water hardness. For these parameters, permittees must determine the hardness of the receiving water to identify the applicable ‘hardness range’ for determining the analytical benchmark monitoring value applicable to the facility. Hardness dependent analytical benchmark monitoring shall follow the table below: Freshwater Hardness Range Zinc (mg/L) 0.00 – 24.99 mg/L 0.037 25 – 24.99 mg/L 0.052 50 – 74.99 mg/L 0.080 75 – 99.99 mg/L 0.107 100 – 124.99 mg/L 0.132 125 – 149.99 mg/L 0.157 150 – 174.99 mg/L 0.181 175 – 199.99 mg/L 0.204 200 – 224.99 mg/L 0.227 225 – 249.99 mg/L 0.249 250+ mg/L 0.260 If hardness cannot be determined (groundwater or inaccessible waterbodies), use the most conservative values (0-24.99 mg/L range). Saltwater benchmark values apply to stormwater discharges into saline waters where indicated. Table I.C.5 – Analytical Benchmark Monitoring Parameters forAgricultural Chemicals (SIC 2873 – 2879) Parameter Benchmark Monitoring Concentration Nitrate plus Nitrite Nitrogen 0.68 mg/L Total Recoverable Lead (freshwater) Hardness Dependent 1 Total Recoverable Lead (saltwater) 2 0.210 mg/L Total Recoverable Zinc (freshwater) Hardness Dependent 1 Total Recoverable Zinc (saltwater) 2 0.090 mg/L Total Phosphorus 2.0 mg/L The freshwater analytical benchmark monitoring values of some metals are dependent on water hardness. For these parameters, permittees must determine the hardness of the receiving water to identify the applicable ‘hardness range’ for determining the analytical benchmark monitoring value applicable to the facility. Hardness dependent analytical benchmark monitoring shall follow the table below: Freshwater Hardness Range Lead (mg/L) Zinc (mg/L) 0.00 – 24.99 mg/L 0.014 0.037 25 – 24.99 mg/L 0.024 0.052 50 – 74.99 mg/L 0.045 0.080 75 – 99.99 mg/L 0.069 0.107 100 – 124.99 mg/L 0.095 0.132 125 – 149.99 mg/L 0.123 0.157 150 – 174.99 mg/L 0.152 0.181 175 – 199.99 mg/L 0.182 0.204 200 – 224.99 mg/L 0.213 0.227 225 – 249.99 mg/L 0.246 0.249 250+ mg/L 0.262 0.260 If hardness cannot be determined (groundwater or inaccessible waterbodies), use the most conservative values (0-24.99 mg/L range). Saltwater benchmark values apply to stormwater discharges into saline waters where indicated. Numeric Effluent Limitation Monitoring. Numeric effluent limitation monitoring shall be required for sector C facilities conducting certain industrial activities. The concentration of pollutants in stormwater discharges, independent of comingling, as discussed in Part V.C.2, shall not exceed the following effluent limitations at any time during the duration of permit coverage. Table I.C.6 – Numeric Effluent Limitation Monitoring Parameters Industrial Activity Parameter Effluent Limitation Runoff from phosphate fertilizer manufacturing facilities (SIC 2874) that comes into contact with any raw materials, finished product, by-products or waste products Total Phosphorus (as P) 105 mg/L, daily maximum 35 mg/L, 30-day average1 Fluoride 75 mg/L, daily maximum 25 mg/L, 30-day average1 For averaging purposes, you may use a value of zero for any individual sample parameter which is determined to be less than the method detection limit. For sample values that fall between the method detection limit and the quantitation limit (i.e., a confirmed detection but below the level that can be reliably quantified), use a value halfway between zero and the quantitation limit.