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-, <br />Richard D. Lamm <br />Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />David H. Getches, Executive Director <br />MINED LAND RECLAMATION DI\ <br />DAVID C. SHELTO N. Director <br />DATE: May 2, 1986 <br />T0: Jeff Deckler <br />FROM: Dale Plume•~•~~~ <br />RE: REVIEW OF COAL RIDGE #1 AHR, COMMENTS <br />In general there seems to be a significant amount of ground and surface water <br />sampling data acquired by Storm King Itines. However, correct me if I'm wrong, <br />but there seems also to be portions of these data missing; especially in the <br />years 1982-1984. Certain heavy metals and potentially regulated chemicals may <br />be missing for various reporting periods. <br />I,reviewed a letter dated April 6, 1984 sent by MLRD to Storm King that stated <br />the ground water baseline monitoring program was inadequate at that time, but <br />I believe it meant that was because a full year of testing hadn't been done. <br />I haven't been able to find a letter or commentary record stating why there <br />are so many data points missing in the 1982-84 years. Finally, the following <br />list of items relates to possible problems with the AHR reporting accuracy or <br />possible natural effects. <br />1. Well OW-4L in 1984-1985: water seems to be very hard and high in <br />sulfates; <br />2. Well OW-4L 1983-1984: water is very hard, high in sulfates, and <br />contains trace metals which may exceed various regulatory parameter <br />standards. These metals are: <br />arsenic, cadmium, iron, manganese, molybdenum; <br />3, hell OW-4L may also have detection limits (minimum detection <br />limits) set too high for some parameters such as molybdenum, <br />arsenic, mercury, cadmium, etc. This may be true for some other <br />wells as well; <br />4. {Jell OVI-8 shows moderately fair to good water quality. However, <br />this WQ seems to get poorer (especially TDS, S04) when approaching <br />late in 1985 season (August, September); <br />5. Well OW-11 seems to be affected by river stage; consequently, is <br />probably affected by downward leaching and upward remobilization of <br />salts (NaCI), and may indicate an area of poor irrigation potential; <br />6. Well OW-11 baseline shows high iron, manganese, molybdenum, <br />arsenic, and cadmium at various sampling periods; <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (303) 866-3567 <br />III IIIIIIIIIIIII III <br />999 <br />