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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division Rationale - Page 6. Permit No. CO-0000221. VI. TEAMS AND CONDITIONS OF PERMIT A. Effluent Limitations In developing suitable effluent limitations, the Division must review all applicable standards and regulations and apply that which is more stringent. This review includes, but is not limited to, the water quality standard based effluent limitations, federal guidelines and standards (40 CFR Subchapter N) and State Effluent Regulations (10.1.0). Such a review has been done for this facility. The following limits will apply and are discussed below. Table VI-1 -- Effluent Limits - 002, 003 Parameter Flow, MGD TSS, mg/1 Total Iron, mg/1 pH, s.u. Oil and Grease, mg/1 Total Dissolved Solids, mg/1 Whole Eff. Toxicity, Acute Table VI-2 -- Effluent Limits - 004 Parameter Limit Rationale Report a/ NA 35/70 b/ Best Professional Judgment 3.5/7.0 b/ Best Available Technology 6.5-9.0 c/ Water Quality Standards 10 d/ State Effluent Regulations Report d/ Salinity Regulations Report See Discussion, VI.A.S Limit Rationale Flow, MGC TSS, mq/1 Total Recoverable Iron, mg/1 Total Recoverable Iron, mg/1 pH, s.u. Oil and Grease, mg/1 Total Dissolved Solids, mg/1 Whole Eff. Toxicity, Acute Whole Eff. Toxicity, Chronic Report a/ 35/70 b; 7.0 d/ 1.0 a/ 0.5-9.0 c/ 30 d/ Report d/ Report Report NA Best Professional Judgment Best Available Technology Water Quality Standards Water Quality Standards State Effluent Regulations Salinity Regulations See Discussion, VI.A.S See Discussion, VI.A.S.. Table VI-3 -- Effluent Limits - 005, 006 Parameter Limit Rationale Flow, MGD TSS, mg/1 Total Iron, mg/1 pH, s.u. Oil and Grease, mg/1 Total Dissolved Solids, mg/1 Whole Eff. Toxicity, Acute Report a/ NA 35/70 b/ New Source Performance Standards 3.0/6.0 b/ New Source Performance Standards 6.5-9.0 c/ Water Quality Standards 10 d/ State effluent Regulations Report d/ Salinity Regulations Report See Discussion, VI.A.S