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~ .C Dan Mathews -2- June 18, 1981 (3) Properly reclaiming the site with the required 4 feet of nontoxic soil cover, and appropriate revegetation. Obviously, the applicant's first task is to ascertain what specifically they are building and which sections of the regulations apply. I can assist you working with them, but we will need more information on their general plans. Secondly, the applicant should ascertain what other county and state permits may be required for the approval of such a disposal site. Outside their mining permit area this fill may be considered a separate solid waste disposal site by the county and state health departments and may need separate land use and health department approval of Delta county and other departments of the state government. Thirdly, the applicant should then complete the site-specific geotechnical work necessary to complete and submit the detailed engineering plan and appropriate supporting geotechnical and stability analyses for the proposed waste site. 'Subsidence `-- The applicant's subsidence monitoring plan, with the addition of points "a-i" paralleling Highway 133 and points "I-6" in the area of the seventh west and eighth west entries, will conform with the requirements of Rule 2.05.6(6)(c). While the proposed monuments are not as substantial as we would ideally desire, 2 agree with the applicant's observation that the site is extremely 'inaccess- able, and I believe they will be acceptable. If future monitoring results prove them to need modification we can require it at that time. Older monuments "A-N" .appear to be performing fairly well and I assume that the newer monuments, similar in construction, will also perform acceptably. Wester Slope Carbon should add one final sentence to its response indicating that they will submit the results of the monitoring observations to us at Least on a semi-anual basis, per the requirements of Rule 2.05.6(6)(c)(i)(F). mab cc: Fred Banta