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<br /> <br /> <br />COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale - Page 4. Permit No. CO-0036684. <br />V. PERFORMANCE HISTORY <br />B. Compliance with Terms and Conditions of Previous Permit <br />A review of the information available to the Division has shown no <br />compliance problems with the previous permit. <br />VI. TERMS AND CONDITIONS OF PERMIT <br />A. Effluent Limitations <br />In developing suitable effluent limitations, the Division must review <br />all applicable standards and regulations and apply that which is more <br />stringent. This review includes, but is not limited to, the water <br />quality standard based effluent limitations, federal guidelines and <br />standards (40 CFR Subchapter N) and State Effluent Regulations <br />(10.1.0). Such a review has been done for this facility. The <br />following limits will apply and are discussed below. <br />Table VI-1 -- Effluent Limits <br />Parameter Limit <br />Flow, MGD 0.46 a/ <br />TSS, mg/1 35/70 b/ <br />pH, s.u. 6.5-9.0 c/ <br />011 and Grease, mg/1 10 d/ <br />Total Recoverable Iron, mg/1 1.9 a/ <br />Conductivity, micromhos/cm Report d/ <br />Whole Effluent Toxicity, Acute Report <br />Whole Effluent Toxicity, Chronic Report <br />Rationale <br />Design Flow <br />BPJ of BCT'~ <br />Water Quality Standards <br />State Effluent Regulations <br />Water Quality Standards <br />Salinity Regulations <br />See Discussion <br />See Discussion <br />*Best Professional Judgment of Hest Conventional Pollutant Control Technology <br />J 30-day average <br />b/ Average of daily values for 30 consecutive days/Daily maximum <br />c/ Minimum-Maximum <br />d/ Daily maximum <br />1. Water Quality Standard Based Effluent Limitations: <br />a) pH: In the case of pH, the limits are set directly from stream <br />standards. <br />b) Metals: Metals can be present in coal mine-related discharges. <br />Tie permittee submitted monitoring data for the effluent, which <br />showed that all metals sampled for were either not detected, or <br />found at levels substantially lower that the Water Quality <br />Standards (WQS) for Fish Creek. Therefore, with the exception <br />