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~, <br />P.O. BOX 2207 <br />B RECKEN RIDG E, CO 80424 <br />303/453-2206 <br />iii iiiiuiiniiiiii' <br />999 <br />~ l' <br />\ ~ti\ <br /> <br />April 4, 1996 <br />CORRESPONDENCE ADDRESS <br />14802 WEST 44TH <br />GOLDEN, CO 80401 <br />RF~EI>JEQ <br />APR 0 4 1~9~i <br />Olvlslon o1 Minerals &~', T aayq <br />Mr. Allen Sorenson e010gy <br />Colorado Division Of Minerals and Geology <br />1313 Sherman Street, Room 218 i Q--(Xj~ <br />Denver, Colorado 80203 <br />Re: Permit Technical Revision - Fairplay Site <br />Permit No. M-82-086 <br />Dear Mr. Sorenson: <br />I am submitting for your approval a technical revision to address <br />issues you identified in your inspection report for the Fairplay <br />site. <br />Stormwater Runoff <br />The majority of contaminants that occur from a sand and gravel mine <br />are either sediment, oil or grease. The mining operation will use <br />the following measures to protect the area from pollution due to <br />Stormwater runoff. Internal drainage from the mining area will be <br />contained by contouring the topography to maintain drainage within <br />the mining area. Small berms (1 foot) may be incorporated to <br />prevent excessive runoff into the river. <br />Oil and grease occur mostly from equipment stored on-site and fuel <br />storage. Alpine Rock Co. will properly store all above ground <br />fuels. No underground storage of fuels is planned. Oil and grease <br />will be controlled through maintenance of equipment and the use of <br />drip pans for oil leaks prior to repair. <br />A Colorado Pollutant Discharge Elimination System (CDPES) permit <br />for Stormwater will be obtained for the project prior to operation <br />at the site. <br />Material Processing <br />Alpine Rock Co. requests an extension of current operations to <br />include portable asphalt mixing, portable concrete batching and <br />portable aggregate washing. The materials produced from the <br />property are suitable for the manufacturing of concrete and <br />asphalt. <br />SAND • GRAVEL • CONCRETE COMMERCIAL PAVING <br />