Laserfiche WebLink
~~~' • • IIIIIIIIIIIIIIIIIII <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman 51., Room 215 IIJ~~ <br />Denver, Colorado 80203 I <br />Phone: 13031 866-3567 <br />FA%:13031832-8106 <br />DEPARTMEIJT OF <br />NATURAL <br />RESOURCE <br />Roy Romer <br />Gavemor <br />lames 5. Lochhead <br />Ezetunve Director <br />Michael B. Lang <br />DATE: July 15, 1994 Dimsiaa Dlreaar <br />TO: Berhan Keffelew / <br />FROM: Harry Posey <br />RE: Response: July 7, 1994 memo from CC&V to B. Keffelew, Ironclad Tailing <br />Material -Completion of Assessment of Water Quality <br />The memo cited purports to have summarized a meeting between Division staff (Humphries, Keffelew, <br />Mount, Pendleton and Posey) and Golder Associates (Van Zyl and Kidd) on June 30, 1994. In the <br />memo, CC&V conclude that they were given the go-ahead in that meeting to use Iron Clad Tailings <br />as a soil liner for the Cresson Valley Leach facility. The memo also identifies conclusions which they <br />consider to have been reached in the meeting. I do not concur with all of the conclusions that were <br />identified in the July 7 memo. <br />The purpose of the meeting was to discuss two items: <br />a) results of MWMP tests of Iron Clad tailings and <br />b) results of MWMP tests of proposed underdrain fill. <br />During the meeting, the Division noted several shortcomings in the reports on these two items. The <br />following explains. <br />1. The MWMP analyze list included only the parameters that are measured in Fourmile Creek. This <br />is a surface water station, only. Also, it has not been established that the parameters that will <br />be measured in Fourmile Creek are those that will be established at surface water compliance <br />points closer to the disturbed area of the Cresson facility. It was recommended that until a <br />parameter list is established for AG 1.5, CC&V should measure all analytes that may be regulated <br />under surface water requirements. <br />2. The MWMP analyte list did not consider parameters that might be regulated under a groundwater <br />discharge permit. Further, because it is apparent that Arequa Gulch surface water is likely to <br />