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<br />PART I <br />Page lb of 19 <br />Permit No. CO-0027146 <br />A. TERMS AND CONDITIONS <br />2, Effluent Limitations For Outfalls 005. 006. 007. 008, 009. 010. 011. <br />012. 013 and 014 (continued) <br />ALTERNATE LIMITATIONS <br />Any discharge or increase in the volume of a discharge caused by <br />precipitation within any 24-hour period less than or equal to the <br />10-year. 24-hour orecioitation event (or snowmelt of equivalent <br />volume) may comply with the following limitations subject to burden of <br />proof requirements described itt Part I.A.3, <br />Effluent Parameter <br />Flow, MGD <br />Settleable Solids, ml/1 ~J <br />pH, standard units (minimum-maximum) <br />Oil and Grease, mg/1 (No visible sheen) <br />Total Dissolved Solids, mg/1 <br />Discharge Limitation <br />Report <br />0.5 c/. <br />6.5-9.0 <br />to J <br />Report <br />Any discharge or increase in volume of a discharge caused by <br />precipitation within any 24-hour period greater than the 10-vear. <br />24-hour event (or series of storms or snowmelt of equivalent volume) <br />m~ comply with the following limitations subject to burden of proof <br />requirements described in Part I.A.3. <br />Effluent Parameter <br />Flow, MGD <br />pH, standard Units (minimum-maximum) <br />Oil and Grease, mg/1 (No visible sheen) <br />Total Dissolved Solids, mg/1 <br />3. Burden of Proof Requirements <br />Discharge Limitation <br />Report <br />6.5-9.0 <br />10 J <br />Report <br />The permittee has the burden of proof when requesting relief from <br />total suspended solids (TSS), total iron and/or settleable solids <br />limitations. Relief shall be granted only when necessary and shall <br />not be granted when the permittee has control over the discharge. The <br />permittee should endeavor to meet the primary limitations whenever <br />possible. <br />a) For rainfall. to waive TSS and total iron limitations, it is <br />necessary to prove that discharge occurred within 48 hours after <br />measurable precipitation has stopped. In addition, to waive <br />settleable solids limitations, it is necessary to prove that <br />discharge occurred within 48 hours after precipitation greater <br />than the 10-year, 24-hour event has stopped, <br />See part I.C. for Footnotes <br />