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t COLORADO <br /> irLy Department of Public <br /> '�` Health&Environment Water Quality Control Division Fact Sheet,Permit No. C00048939 <br /> Table II-1. Outfall information <br /> Outfall Latitude N Longitude W Wastewater Source Design Receiving g <br /> Flow MGD Water <br /> Commingled mine drainage Cripple <br /> 001 38.7541667°N 105.1722222°W water and 0.1782 <br /> stormwater runoff Creek <br /> 002` 38.753220°N 105.172283°W Stormwater runoff from large NA Cripple <br /> raw material pile Creek <br /> The latitude and longitude for outfall 002 were determined by the division. <br /> The location(s) provided above will serve as the point(s)of compliance for this permit and are appropriate as they <br /> are located after all treatment and prior to discharge to the receiving water. <br /> III. SUMMARY OF MAJOR CHANGES FROM LAST RENEWAL <br /> This renewal permit is a conversion of a Minimal Discharge (MINDI) general permit certification to an individual <br /> permit. The MINDI permit has been administratively extended since 2006 when it expired, and the division decided <br /> at that time to not renew the general permit. Instead, the division has provided CDPS permit coverage for <br /> permittees covered under the administratively extended MINDI through alternate general permits and individual <br /> permits, such as this individual permit. The summary of major changes from previous permit coverage is provided <br /> below: <br /> • A monitoring requirement has been added to the permit for the parameters arsenic, cadmium, trivalent <br /> chromium, copper, iron, manganese, mercury, nickel, selenium, and zinc at outfall 001. <br /> • Settleable solids limits based on the Federal ELG have been added to the permit for outfall 001. These <br /> limitations are effective immediately as compliance schedules are not applicable to limits based on federal <br /> ELGs. <br /> • A new stormwater outfall designation (outfall 002)was added to the permit for an existing stormwater <br /> discharge. <br /> • Stormwater provisions (effluent limitations, terms and conditions)were added to the permit for discharges <br /> from outfall 002. <br /> IV. RECEIVING STREAM <br /> A. Waterbody Identification: COARUA21a, Cripple Creek <br /> B. Water Quality Assessment: <br /> An assessment of the stream standards, low flow data, and ambient stream data has been performed to <br /> determine the assimilative capacities for Cripple Creek for potential pollutants of concern. This information, <br /> which is contained in the Water Quality Assessment (WQA) for this receiving stream(s), also includes an <br /> antidegradation review, where appropriate. The Division's Permits Section has reviewed the assimilative <br /> capacities to determine the appropriate water quality-based effluent limitations as well as potential limits <br /> based on the antidegradation evaluation, where applicable. The limitations based on the assessment and other <br /> evaluations conducted as part of this fact sheet can be found in Part LA of the permit. <br /> V. FACILITY DESCRIPTION <br /> A. Industry Description <br /> Page 2 of 17 <br /> 4300 Cherry Creek Drive S., Denver,CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wgcd * a <br /> r1'7 <br /> John W.Hickenlooper,Governor Larry Wolk,MD,MSPH, Executive Director and Chief Medical Officer CO <br />