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King Coal Mine (C-1981-035) TR -20 Adequacy Review #3 Response <br />➢ 4.05.1(4) Hydrologic Balance- General: (b)(vii) and (c)(iii) <br />➢ 4.05.8 Hydrologic Balance -Acid-forming and Toxic -forming Spoil <br />➢ 4.05.11 Ground Water Protection <br />➢ 4.14.1 Backfilling and Grading- General: (2)(f)(iv) <br />➢ 4.14.3 Backfilling and Grading - Covering Coal and Acid and Toxic -Forming Materials <br />Adequacy items as per the review of this document: <br />1. The plan provides very few specifics or justifications relevant to the King II mine. <br />Please provide a site specific plan. <br />GCCE Dec. 2015: A comprehensive plan addressing the chemistry of coal mine waste <br />generated from the King I and King II mines, and stored in the Refuse Pile located at <br />the King I mine, has been attached to be included as King II Appendix 4(8). Pages King <br />I 2.04.6 page 4 and King II 2.04.6 page 7 have been modified to direct the reader to the <br />material in Appendix 4(8). <br />2. Copper and Cadmium, listed in Table 3 of the DRMS guidance document are not listed in the proposed <br />chemical parameters and Methods of Analysis table provided by GCC. The Table provided by GCC is a <br />copy of Table 5 in the DRMS guidance document, which is "Overburden Geochemistry - Suggested <br />Methods of Analysis". Table 3 of the guidance document lists the Suggested Chemical Parameters. No <br />rational for leaving Cadmium and Copper off the list of proposed analytes to be monitored was <br />provided. <br />Please either provide a rationale for not monitoring these analytes or include them on the parameters to be <br />monitored. <br />GCCE Dec. 2015: Cadmium and Copper have been added to the list of proposed <br />analytes to be monitored. <br />3. No discussion or rational was provided as to the selected number or location of samples. <br />Please discuss: <br />1. how many samples will be taken <br />GCCE Dec. 2015: King I: Samples will be collected from three drill holes located as <br />shown on Appendix 4(8) Map 1 and Map 1A, Detail. Map 1 represents a survey <br />performed in January, 2006 at a time when the refuse pile consisted only of King I <br />refuse material. The cross-sections on the left portion of the show the holes to be <br />drilled and the existing surface and refuse pile/pre-refuse pile interface. <br />King II: As shown on Appendix 4(8) Map 2, four additional samples will be collected <br />from existing drill cores or from within the current workings of the King II mine. <br />ii. sampling frequency <br />GCCE Dec. 2015: King I drill hole locations are spaced at approximately one-third <br />intervals across the refuse pile. <br />King II sample locations are spaced at approximately one hole per square mile as per <br />CDRMS guidance document "Guidelines for the Collection of Baseline Water Quality <br />and Overburden Geochemistry Data". <br />iii. how and why specific locations were chosen. <br />