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COLORADO DEPARTMENT OF HE~at.TH, Water Quality Control Division <br />Rationale -Page 14, Permit No. CO-0043648 <br />Also, verbal notification shall be givers to the Division within 24 hours of the occurrence of any discharge that <br />may qualify for the exemption. Then, a report must be submitted within 5 days of the said discharge, <br />docurnerrting that the facility was maintained to contain the previously specified volumes. Tlne permittee must <br />also submit documentation of the starnn evert[, including the precipitation gauge station (or ti:e permittee's own <br />gauge), the vo[unre of runoff produced and the steps taken to maintain [reatnnent and minimize the amount of <br />overflow. <br />All data/documentation required 6y this section whit/: can nor be reported on applicable discharge monitoring <br />report jornu (DMRs) shall be reported in a letter as an attachment to the DMR. Submittal of docttmenration of <br />corntainn:ent, ntnintertance acrd precipitation records above does not exempt the permittee from any other <br />notification requirements of this permit. <br />e. Limits for Specific Discharge Points <br />Table VI-1 <br />Limits for Point: <br />OOIA -Discharge From the Sediment Pond Located Below the Valley Leach Facility to Arequa Gulch <br />Discharge Limitations <br />EjJluent Parameter 30-Day Avg Daily Max. Rationale <br />Flow, MGD Report Report Discharge Assessmernt <br />TSS, mg/l 20 30 Federal Effluent Limit Guidelines <br />Oi[ and Grease, mg/1 N/A 10 State Effluent Regulations <br />Ammonia, Total, mg/1 as N 0.2 Report Water Quality Standards <br />Nitrate, mg/l. Repot Report Discharge Assessment <br />Total Hardness, »rg/[ as CaCO~ Repot Report Metals Standards Assessment <br />Copper, Potentially Dissolved, mg/l 0.039 0.065 Water Qunfiry Standards <br />Lead, Potentially Dissolved, mg/1 0.028 0.6 Water Quality Standards/EEG's <br />Mercury, Total, mg/l 0.00001 0.002 Wa[er Quality S[andards/EEG's <br />Nickel, Potentially Dissolved, mg/1 0.274 2.6 Water Qualiq~ Standards <br />Whole Effluent Toxicity, Chronic State Permit Regulations <br />Thru August 3l, N/A Report <br />1998 N/A No Statistical <br />Beginning September I, Difference <br />1998 <br />Limits Applicable During Temporary Standards Modifications -Ef fective Through 12/31/97 <br />pH, su (minimum-mazirrnum) N/A 6.0 - 9.0 Federal Effluent Limit Guidelines <br />Cyanide, WAD, mg/1 0.021 0.27 Water Quality Standards <br />Aluminum, Potentially Diss, mg/1 22 32 Water Quality Standards <br />Cadmium, Potentially Dissolved, mg/l 0.017 0.10 Water Quality Standards/EEG's <br />/ton, Total Recoverable, rag/I 3.0 52 Water Quality Standards <br />Manganese, Potentially Diss, mg/1 9.0 12 Water Quality Standards <br />Zinc, Total, mg/! 0.75 1.5 Federal Effluent Limit Guidelines <br />