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On the groundwater quality monitoring schedule, Table 2.04.7-T9, the frequency for semi-annual water <br />quality sampling has been changed from `May/June and September/October' to `May/June and <br />August/September'. The annual frequency was changed from `May to August' to `May/June'. These <br />changes were made to synchronize the `water level' frequencies with the `water quality' frequencies. <br />Also, Well COV11, which was completed in 2011, has been added to the monitoring program. <br />On the surface water monitoring schedule, Table 2.04.7-T11, the frequency for spoil springs has been <br />changed from semi-annual to annual. This schedule coincides with the CDRMS approved spoil spring <br />monitoring frequencies for the Seneca II, Seneca II-W and Yoast Mines. The monitoring frequency for <br />Cow Camp Creek Site SSC10 has been changed from `triannually' (April, June and September) to <br />`monthly' (June and July). This site in Twentymile Park is inaccessible in April and is usually dry in <br />September. The `June and July' schedule coincides with the recently CDRMS approved monitoring <br />frequency for the Fish Creek/Twentymile Park sites associated with the Seneca II Mine. Finally, the water <br />quality parameters for NPDES sites have been clarified to indicate those parameters which are required in <br />the NPDES/CDPS permit. A copy of that permit is provided in this TR package for insertion into the <br />PAP. <br />Finally, Map 2.05.3-E2.C, Sediment Pond 004 Asbuilt, has been revised to indicate a change in the trash <br />rack design. <br />Attached are the required application form, public notice, insertion instructions, and the revised/updated <br />material. Enclosed are two (2) copies of an application for a technical revision to the Peabody Sage Creek <br />Mine. Should you or any other member of the Division have questions regarding the information, please <br />contact Dennis Jones at (970) 276-5209. <br />Best regards, qC9-_? <br />Dennis Jones <br />Hydrologist I <br />Peabody Energy <br />cc: Mike Ludlow, PSCM <br />B. Scott Cowman, PSCM <br />Foster Kirby, OSMRE, Denver <br />Jennifer Maiolo, BLM, Craig