Laserfiche WebLink
IIIIIII 9 111111111 <br /> B9 <br /> STATE OF COLORADO <br /> MINED LAND RECLAMATION DIVISION ID- <br /> RoyDepartment of Natural ResourcesDen Sherman Bt., Room 215Denver.CO 80203 <br /> 303 866-3567FAX: 303 832-8106 Romer. <br /> Co emor <br /> Fred R.Banta, <br /> January 12, 1990 Dmsian D:remor <br /> Mr. Robert Sherman <br /> Rockcastle Coal Company <br /> C/O Mr. Mark Korb <br /> Korb and Carroll <br /> 106 Oak Street <br /> Fort Collins, Colorado 80524 <br /> RE: 1989 Annual Hydrology Report, Grassy Gap Mine, C-81-039 <br /> Dear Mr. Sherman: <br /> I have reviewed the 1989 Annual Hydrology Report submitted by <br /> Mr. Allan Miller. Monitoring appears to have been performed in compliance <br /> with the plan. I did notice three things that I would like you to modify in <br /> future sampling, however. <br /> We request that the parameters for groundwater samples be analyzed for <br /> dissolved species and that parameters of surface water samples be analyzed for <br /> the total recoverable species. The sample obtained from the Pit 2 spoils well <br /> was analyzed for the total recoverable species, which resulted in higher <br /> concentrations of trace metals than would be expected from the dissolved <br /> species analysis. Along similar lines, the ammonia levels in surface water <br /> samples should be analyzed for the un-ionized form, while the groundwater <br /> samples should be analyzed for the ionized form, which is called "nitrogen, <br /> ammonia." Please ask, Mr. Miller to modify his request to the laboratory. <br /> Lastly, Rockcastle has not been able to acquire any data from the Grassy Creek <br /> upstream site since Technical Revision 2 was approved in 1987. I would like <br /> to suggest that Rockcastle modify the hydrologic monitoring plan during the <br /> renewal process to use SW-7 as the upstream site. Both SW-3 and SW-7 are on <br /> undisturbed drainages, and SW-7 has historically had water sometimes when SW-3 <br /> has not. <br /> If you have any questions, do not hesitate to call . <br /> Sincerely, + <br /> (a� lv C0 <br /> Catherine W. Begej <br /> Reclamation Specialist <br /> CWB/yj b <br /> 301 3F <br />