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The Union Milling Company <br />P.O. Box 620490 <br />a" Litllefon, CO 80162 -0490 <br />+1.303.947.3499 <br />RECEIVED <br />r,� 1 ??013 <br />December 13, 2013 DIVISION OF RECLAMATION <br />Mr. Michael Cunningham MINING AND SAFETY <br />Environmental Protection Specialist <br />Division of Reclamation, Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />michael.cunningham @state.co.us <br />RE: Leadville Mill; M1990 -057, Response to Amendment Review No.2 <br />Dear Mr. Cunningham, <br />Following are Union Milling Company's (UMC) responses to Adequacy Review No. 2 queries. <br />6.4.21 Exhibit U - Designated Mining Operation Environmental Protection Plan <br />The Division was unable to locate a copy of the Operator's current surface and ground water <br />sampling plan in the permit file. As required by Rule 6.4.21(12), please provide the Division <br />with a Standard Operating Procedure (SOP) for sampling surface and ground water. The <br />SOP should include the following: <br />a) Equipment needed, including calibration procedures and decontamination methods if <br />required. <br />b) Sample collection methods, including well purging, sample labeling and data <br />recording. <br />c) Filtering methods. <br />d) QA/QC Plan. <br />e) Field measurement methods. <br />f) Sample delivery, including chain of custody forms and holding limes. <br />g) Reporting analytical results to the Division. <br />h) Complete list of analytes to be sampled, <br />Sample suites should include the appropriate number of duplicates and blanks; the Division <br />will require at least one blind duplicate per sample event. It is also recommended that <br />additional types of blanks, such as field blanks be included. <br />For surface water sampling, the Applicant Certain parameters are best measured in the field <br />due to changes that start to occur to the water sample immediately after removal from the <br />natural environment. Parameters that must be measured in the field include pH and <br />temperature. <br />