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• Table 9.3-9 <br />West Ridge Area Soil Materials Mass Balance <br />Acres of Topsoil Topsoil Acres of <br />Topsoil Removed Replaced Topsoil <br />Removed (cu.yds) (cu.yds) Replaced <br />64.5 68,611* 177,030 132.6 <br />* This value was based on the soil survey information. Several additional <br />pockets of topsoil occurred on previously disturbed land that were not <br />mapped. These topsoil resources were salvaged causing a difference in the <br />topsoil removed and topsoil replaced cubic yardage columns. <br />Table 4.3-5 <br />West Ridge Area Soil Mass Balance by Ownership <br />Chevron <br />Topsoil Salvage (Acres/cu.yds) <br />Federal <br />Acres cu.yds Acres cu.yds <br />39.5 37,091 26.3 29,739 <br />• <br />Replacement Depth and Acreage by Ownership <br />Chevron Federal <br />Year Acres cu.yds. Depth Acres cu.yds. Depth <br />Prior <br />to <br />1992 50.1 79,034 11" 11.9 16,797 11" <br />1995 - - - 57.9 70,067 9" <br />Totals 50.1 74,039 69.3 86,864 <br />See Exhibit 9.3-2 for redistribution locations <br />• <br />Long <br />Acres cu.yds <br />1.7 1,781 <br />Acres cu.yds. Depth <br />0.2 321 11" <br />13.0 15,811 9" <br />13.2 16,132 <br />Renewal-3 4.3-8 June 13, 1997 <br />