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~~rn 77Z-- ~g ~~r~y~~1o <br />RESPONSE <br />Response to the topsoil handling comments will be provided in / <br />the second set of mid-term review responses. <br />4a) There still appears to be a discrepancy between the elevations <br />identified on Map 15a, and that recorded in revised Table 62a for <br />Well 028-79-61. <br />RESPONSE <br />fihe elevation for Well 028-79-61 noted on Map 15a is the water <br />level elevation in June, 1980 as noted in the map legend. <br />Elevations presented in Table 62a are top of casing elevations <br />as indicated by the column heading. <br />4b) In retyping Table 62a, a typographical error was noted for 028-DH-3b. <br />The staff believes the total depth should be 160'. <br /> <br />RESPONS <br />The CMLRD's observation relative to total depth for Well 028-DH-' d` <br />36 is correct. Table 62a has been revised accordingly and <br />accompanies these responses for replacement in the permit <br />document. <br />4c) The casing information found on the bottom of Table 62a reflects <br />inappropriate completion techniques for, the bedrock, non-alluvial <br />wells. Coal wells that have slotted casing throughout their 100'- <br />500' lengths result in comingling of aquifers and the failure to <br />identify the zone of monitoring interest. Please propose a plan to <br />obtain water quality data reflective of the zone of interest. <br />RESPONSE <br />Based upon available information, Kerr Coal believes that all r~"`~- <br />groundwater wells utilized for ongoing monitoring have been '" <br />properly cased and completed. This contention is based upon <br />Kerr's experience that uncased wells in this are will not remain <br />open for any extended period of time and the consistency of <br />monitoring results to date. While Kerr Coal acknowledges that <br />the coal monitoring wells were completed using full length <br />