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STATE OF COLORADO <br />Divi?lo? o? ?ECt????r?oN, Mi?v??rc Aga s?FFr? <br />Department of I?latural E?esources <br />? 313 Sherman 5t., Raom 2 ? ? <br />Denver, Colorado 80203 <br />Phar?e: f 303) 8d6-357 <br />FAQ: ?30?J 832?8? Ob <br />December 1 S, ?aa? <br />COLORADO <br />DIVISION OF <br />CLAATIOI? <br />hr???I?G <br />??? <br />SA??TY <br /> Bill Ritter, Jr. <br />Mr. Ray A. Kano Governor <br />Seneca COaI company Fiarri? a. Sherman <br />F,?, ?p? ??'? Executive Director <br />?ayden? ? ? ? ??? Ronald w. Cottony <br /> Division Director <br /> <br />Re; Seneca ?Z Mine Permit No. -1.9$O?Da?} Natural Resource Trustee <br />Phase II Bond Release Request ??-?}Adequacy Review <br />Dear. r, para. <br />The Division of Reclamation, Minim, and Safety ?Di?rision} has the following adequacy <br />comment regarding the water quality dernonstratian presented in the Phase II bond release request <br />submitted by Seneca Caal company ??} on May l?, 2aa8. SAC is required to deruonstrate <br />that the levels of total suspended solids contributed by the reclaimed area to runoff or strearnflo?v <br />outside the permit area is less than or cainparable to ?e pre-mining condition or levels <br />documented for comparable adjacent areas, This can be demonstrated different v?ays. <br />?? chose to use background levels of ?' ? upstream from the reclaimed area and compare those <br />to the last fve years ofdata far three discharging ponds. This is an acceptable approach; however <br />Attachment F in the bond release application only provides data for the post-mine reclaimed <br />condition. states on page l 5 of the application that background levels were higher but does <br />oat provide the Dlvlslan V?rth the rnformat1011 necessary to substantiate this statement. The <br />Division will need the following information. <br />l . Please provide the actual water quality data and sample locations for the background <br />level infarmatian referenced in the water quality demonstration on page ? 5 of the hand <br />release request, and provide an actual comparison ofTS monitoring results that reflect <br />pre-mining conditions versus the reclaimed past-mina conditions to show carripliance <br />with Rule 3.a3.1(?}fib}, <br />Please call if you have any questions. <br />sincerely, <br />{ <br />lVlichael P. Baulay . <br />l?nvironmental Protection Specialist <br />?; Dan Mathews <br />Sandra Bro?vn <br />Off ice of Office of <br />?rtined hand Reclamation Deaver • Gram Junetien • Du?ar?go Active and Inaetiv? Mine