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CHAP1'ERFOUR Responses to Public and Agency Comments <br />Letter and <br />Comment No. Response <br />F-2.2 Five mitigation and monitoring plans have been developed for the Agency <br />Preferred Alternative, and aze included for public review in the following <br />appendices to the Final EIS. <br />A-D Appendices found in the Draft EIS <br />E Pipeline Plan of Development <br />F Subsidence Monitoring Plan <br />G Groundwater and Surface Water Monitoring Plan <br />H Soil Conservation, Erosion and Sediment Control, Reclamation, <br />and Revegetation Plan (Reclamation Plan) <br />I Wildlife Mitigation Plan <br />J USGS Surface Water Quality Data <br />K Groundwater Data <br />F-2.3 Scraping and timber removal within mine panels would be limited to well <br />pads, access roads, and other facilities (see Table 2-2 of the Draft EIS), and <br />would not cover the entire panel. Higher density stands of pinyon juniper <br />would be avoided to the maximum amount possible. Tables 4.7-1 <br />(modified) and 4.7-2 (modified) present the acreage of each vegetation type <br />that would be scraped and de-timbered. Temporary construction and <br />mining operation acreage in both tables aze short-term disturbances since <br />mining panels aze to be reclaimed after panel retirement. <br />F-2.4 a. The 120-foot setting depth of the surface casing is for a typical well, the <br />actual setting depth of the surface casing would be stated on the <br />Application for Permit to Drill (APD) and subject to approval by the <br />BLM on a per well basis. <br />b. The method of cementing the surface casing would be done in the <br />conventional method, pumping down the drill string and up the outside <br />of the surface and displaced to insure that the cement is circulated to <br />surface. <br />c. The anticipated hole size and size and properties if the casing to be used <br />on the surface casing and intermediate casing would be identified in the, <br />APD of each well. The BLM would evaluate the hole size and safety <br />factors (collapse, burst, joint strength and body yield) of each string of <br />casing used. <br />d. The specific method of cementing could vary based on site conditions. <br />The most likely methods include conventional cementing, as described <br />for the surface casing, or tremmie line cementing. In either case, the <br />4-3 <br />