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STATE OF COLORADO <br />COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT <br />WATER QUALITY CONTROL DIVISION A?; 04 0040 <br />TELEPHONE: (303) 692-3500 rg <br />M <br />CERTIFICATION TO DISCHARGE 1876 UNDER <br />CDPS GENERAL PERMIT COR-0400000 <br />STORMWATER ASSOCIATED WITH METAL MINING OPERATIONS AND MINE-WASTE <br />REMEDIATION <br />Certification Number: COR040255 <br />This Certification to Discharge specifically authorizes: <br />Venture Resources, Inc. <br />to discharge stormwater from the facility identified as <br />Hukill Gulch Millsite <br />to: <br />Hukiill Gulch Drainage Clear Creek <br />Facility Industrial Mineral processing using gravity and flotation concentration milling. <br />Activity: Reprocessing old, abandoned mine waste rock dumps, Constructing new <br />tailings impoundment. There is no industrial discharge. <br />Primary SIC Code: 10 <br />Facility Located at: Two Brothers Rd, Idaho Springs <br />Latitude 39.753611111, Longitude -105.53527778 <br />Stormwater Discharge Monitoring Requirements <br /> <br />i )meet r+aramalf <br /> ?u? <br />.63 <br />0 <br />Cadmium, ug/i monthly Grab Potentially dissolved Chronic 0.18 <br /> Ac <br />me <br />4.6 <br />Copper, ug/I monthly Grab Potentially dissolved Chronic 11.4` <br /> Acute 18 <br />Lead, ug/l monthly Grab Potentially dissolved Chronic 0.71 <br /> Acute 54 <br />Zinc, ugA monthly Grab Potentially dissolved Chronic 47 <br />*Temporary modi@catlon, expiration date of 7/0112014. <br />The water quality standards relative to this facility are found in Classifications and Numeric Standards for the <br />South Platte River Basin, (Regulation No. 38, amended 8/10/09, effective 1/30/10); and Basic Standards and <br />Methodologies for Surface Water, (Regulation No. 31, amended 10/13/09, effective 11/30/09). <br />Page 1 a of 22