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999 <br /> STATE OF COLORADO <br /> DIVISION OF MINERALS AND GEOLOGY <br /> Department of Natural Resources <br /> uvlsloN of � <br /> t 313 Sherman St.,Room 215 MINERALS <br /> Denver.Colorado 80203 RECEIVED -&- <br /> Phone: (303)866.3567 <br /> GEOLOGY <br /> A ECLAM A 1 0 N <br /> FFchru0ry4?1999 APR 12 1999 nINjNO•SwEE,Y <br /> 9,11 Owens <br /> Mr.Chris Varra Div StOn of Mmetais& <br /> Geology Guwrnor <br /> Greg E.Walther <br /> Varra Co., Inc. Executive Director <br /> 12910 Weld County Rd. #13 Wchad a Long <br /> Longmont,CO 80504 DvWtor <br /> RE:Technical Adequacy Review of Application for Technical Revision 003 to Permit No.M-74-052,Varra Co. Inc. Pit <br /> Dear Mr. Varra, <br /> This letter is being written to review the application for Technical Revision 003, Permit#M-74-052,Pit No. I,for technical <br /> adequacy. The proposed evaluation to dispose of coal ash by burying it in saturated media lacks adequate details in the <br /> following areas: <br /> 1) According to the Construction Materials Rules and Regulation 3.1.7(7),an adequate amount of ambient groundwater <br /> monitoring must be done prior to the placement of any potentially harmful materials in areas which could effect <br /> groundwater quality.Division policy is to require five quarters of ambient groundwater quality data in order to get a <br /> complete characterization of conditions at the site.Please commit to this monitoring,including a list of parameters, <br /> frequency of monitoring,and a map of the proposed sample locations. This monitoring plan must be reviewed and <br /> approved by the Division. <br /> 2) The Division requires a specific remediation procedure should any contamination(and violation of standards)be <br /> detected in the groundwater monitoring wells,as well as a commitment to contact DMG immediately should the <br /> monitoring indicate an unacceptable degradation of groundwater quality.Please submit this for review. <br /> 3) Details on the formations and aquifers in the immediate area must be submitted once this information is known and prior <br /> to Division approval of the Technical Revision. <br /> 4) Details on the existing and future potential use of groundwater in the area,including the nearest wells to the site and <br /> their uses,are required. <br /> All details in the attached letter from Harry Posey of the Division should also be considered and resolved as soon as possible. <br /> Please respond to this adequacy review prior to your current application decision due date of February 26, 1999, in order for <br /> the Division to consider approving this Technical Revision application. Be advised that this technical revision may be <br /> deemed inadequate,and your permit revision may be denied on February 1 unless the previous adequacy review items are <br /> addressed to the satisfaction of the Division.If you have any further questions, feel free to contact me at(303)866-3567. <br /> Sincerely, <br /> f p l/ <br /> Christina L. Kamnikar <br /> Environmental Protection Specialist <br /> Cc:Carl B. Mount, DMG <br /> Harry H.Posey,DMG <br /> H. Bruce Humphries, DMG <br /> Joby L. Adams,Colorado Groundwater Resource Services <br /> Enclosure <br />