REP04926 - Laserfiche WebLink

Home Browse Search

iii i«<iiiiu~« iii 999 • STATE OF COLORADO DIVISION OF ~11NERALS AND GEOLOGY Department of Natural Resources 1313 Sherman SL, Room 21 S Dtnver, Colorado 80203 Phone: po31 eahaso- F,',:c.IlOA 83:-8106 March 2'_'. ?000 ~~ D l v l$ I O N O F ~~t[NERAL~ GEOLOGY x"cC lA h1A710N 111NING•$AFETT 811 Owens Michael G. Altavilla eovernOr Greg E. Walther Seneca Coal Company Execuore D~rttlor P.O. BOX 670 Michael B. long Division Oirttra Hayden, CO 81639 Re: Seneca II bline (Permit No. C-80-005) 1999 Annual Hydrology Report Review Dear Mr. Altavilla: The Division has reviewed Seneca Coal Company's (BCC's) 1999 Annual Hydrology Report (AHR) for the Seneca II Mine. With only minor exceptions; the frequency of data collection is in '-^'• '' ~~~'~• compliance with the approved monitoring plan contained in the permit document. SCC did a good job at collecting and reporting the required data. The report is well written and the data aze presented in a concise manner. SCC adequately addressed the Division's comments on the 1998 AHR by incorporating responses into the 1999 AHR. The Division has the following comments concerning the 1999 AHR. The following required monitoring data were not provided: • Water level measurements for monitoring well SWC15. • Oil and grease analyses for surface water sites designated for the "short" pazameter list. If available, please provide these data in revised report pages or provide an explanation for the missing data. 2. The surface water and groundwater monitoring frequency tables contained in the approved monitoring plan specify that the "short" list as opposed to the "lone' list will be used for certain monitoring sites. It appears that the "long" list for laboratory pazameters was used even for sites designated for the "short" list. This may be unecessary and result in additional expenditures. If deemed appropriate, please make the necessary arrangements with the laboratory to ensure that only the required parameters aze being analyzed.