REP44223 - Laserfiche WebLink

Home Browse Search

h. DIVISION OF MINERALS AND GEOLOGY Deparimenl of Natural Resources 1317 Sherman St., Room 215 Denver, Colorado 80207 Phone: (3071 866-3567 FAX: 13031872-8106 May I5, 1997 iii iiiiiiiiiiiuiii 999 STATE OF COLORADO I~~~~ DEPARTtv1Et~7'I' OF NATURAi RESOURCE Roy Romer Governor dames 5. Lochhead EaecWive Dueclor Michael B. Long Ms. Christine Johnston Drvisian Direciar Mountain Coal Company P. O. Box 591 Somerset, CO 81434 Re: Adequacy Review of 1993, 1994, and 1995 Annual Hydrology Reports; West Elk Mine; Permit No. C-80-007 Dear Ms. Johnston: Thank you for your cooperation in submitting the laboratory data as requested by the Division in our Annual Hydrology Report (AHR) adequacy review letters dated August 23, 1996, September 6, 1996 and December 9, 1996. The Division has the following remaining comments concerning the laboratory analytical data submitted by Mountain Coal Company (MCC) on April 8, 1996. 1. Not all of the requested data were submitted for groundwater monitoring data collected for the period October 1993 through September 1994. However, as stated in MCC's April 8, 1996 letter, all of the laboratory data sheets are available at the mine office. 2. Minor data transcription errors from the laboratory data sheets to the report tables were still noted for several wells. 3. With MCC's October 8, 1996 AHR response letter, a revised Table E-15 was submitted for Wilcox Reservoir No.l. The laboratory analytical data submitted in your April 8, 1997 letter (06/19/95) sample does not match the 06/19/95 results in Table E-15. 4. During the final review of the laboratory data submitted with your April 8, 1997 letter, it was noted that specific laboratory data sheets did not correspond to the chain-of-custody forms with which they were attached. Although the data sets submitted still exhibit some discrepancies, the Division is not requesting that additional revisions be made to the 1993, 1994, and 1995 AHRs.