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Michael G. Altavilla <br />Seneca Coal Company <br />Page 2 <br />October 15. 1998 <br />detection limits are available for cadmium at a level below the standards listed in Tables <br />5 and 6 of the AHR. Tables 7, 8, 11, and 12 should also have the units provided for all <br />analytical parameters and standazds. No units were provided for any of the constituents <br />listed on these tables. <br />The water quality reports (laboratory pazameters for groundwater and surface water) <br />provided in Appendix D and Appendix E should have an explanation for the symbols "B" <br />and "<" as a footnote. It would also be helpful to put the baseline analyses for both the <br />field parameters and laboratory pazameters on these reports. This could be accomplished <br />by simply adding another column of data and would provide an easy way to identify <br />overall water quality trends in addition to the TDS trend analyses provided. <br />A sample was not collected and reported for well YTC32. According to SCC personnel <br />this well was intended to be installed in the Trout Creek Sandstone, but was completed in <br />the Twentymile Sandstone. The well has been installed for approximately two yeazs but <br />has never been sampled. Please provide an explanation for the footnote (B) contained in <br />Table I S-8 of the Yoast Mine PAP. If SCC does not intend to sample this well, please <br />modify the approved monitoring plan through an appropriate revision. <br />If you have any questions concerning the Division's review of the 1997 AHR, please contact me. <br />Sincerely, <br />/~?~lt~t~ P l3oc~/ <br />Michael P. Boulay <br />Environmental Protection Specialist <br />c: David Berry <br />