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STATE OF COLORADO <br /> DIVISION OF MINERALS AND GEOLOGY <br /> Department of Natural Resources <br /> Ul•1 S,ON C• <br /> 1313 Sherman St.,Room 2 15 M I N E R A L S <br /> Denver, Colorado 80203 Phone: (303)866.3567 G E O 1.O G Y <br /> a EClennT�ON <br /> FAX: (307)832-8106 MIN�NG•Sef t-T <br /> February 4, 1999 adl ow"s <br /> Governor <br /> Mr. Chris Varra Greg E.walcher <br /> Varra Co., Inc. E.ecwive Direcux <br /> 12910 Weld County Rd. #13 Michael B Long <br /> Longmont,CO 80504 Doector <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 NM-74-052, Pit No. 1,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 remediadon 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 I 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 /> ll p <br /> Kq rw� <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 />