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PARTI <br />Page No. 4 <br />Permit No.: CO-0027146 <br />ALTERNATE LIMITATIONS <br />Any discharge or increase in volume of a discharge caused by precipitation within any 24-hour period ereater than the ] 0- <br />yeaz, 24-hour event (or series of storms or snowmelt of equivalent volume) ~X comply with the following limitations subject <br />to burden of proof requirements described in Part I.A.2. <br />Effluent Parameter Discharee Limitations <br /> 30-Dav Ave Daily Max <br />Flow, MGD Report Report <br />Total Suspended Solids, mg/1 Report Report <br />Total Iron, ug/l Report Report <br />Settleable Solids, mUl N/A Report <br />Oil and Grease, mg/1 N/A 10 <br />pH, s.u. (minimum-maximum) N/A 6.5-9.0 <br />Total Dissolved Solids, mg/1 Report Report <br />c. Outfalls 012, 013 <br />PRIMARY LIMITATIONS <br />Effluent Parameter Discharee Limitations <br /> 30-Dav Ave Daily Max <br />Flow, MGD Report Report <br />Settleable Solids, mUl N/A 0.5 <br />Oil and Grease, me,/1 N/A 10 <br />pH, s.u. (minimum-maximum) N/A 6.5-9.0 <br />Total Dissolved Solids, mg/1 Report Report <br />ALTERNATE LIMTTATIONS <br />Any discharge or increase in volume of a discharge caused by precipitation within any 24-hour period greater than the 10- <br />vear. 24-hour event (or series of storms or snowmelt of equivalent volume) may comply with the following limitations subject <br />to burden of proof requirements described in Part I.A.2. <br />Effluent Pazameter <br />Flow, MGD <br />Settleable Solids, mlll <br />Oil and Grease, mg/1 <br />pH, s.u. (minimum-maximum) <br />Total Dissolved Solids, mg/1 <br />Discharee Limitations <br />30-Dav Ave Daily Max <br />Report Report <br />N/A Report <br />N/A 10 <br />N/A 6.5-9.0 <br />Report Report <br />2. Burden of Proof Requirements Outfalls 005, 007, 008. 009, 010. 011.012, 013, 014 <br />The permittee has the burden of proof when seeking relief from total suspended solids (TSS), total iron and/or settleable <br />solids (SS) limitations, as applicable. Outfalls 005, 007, 008, 009, 010, 011, 012, 013 and 014 are eligible for relief, <br />providing the exceedence is caused by precipitation. Outfalls 001, 002 and Ol ti are not eligible. <br />Relief may be granted for each discharge occurrence only when necessary and shall not be granted when the pemrittee has <br />control over the discharge. The pernuttee should endeavor to meet the primary limitations whenever possible. The permittee <br />will need to show that exceedence of the applicable limitations was caused by precipitation and no other source and that the <br />discharge was beyond their control. <br />a. For rainfall to waive TSS and total iron limitations, it is necessary to prove that discharge occurred within 48 hours after <br />measurable precipitation has stopped. In addition, to waive settleable solids limitations, it is necessary to prove that <br />discharge occurred within 48 hours after precipitation greater than fire 10-year, 24-hour event has stopped. <br />-See Part LC. for Definitions. <br />INDperBP.doc <br />Revised 09/15/03 <br />