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Figure 3.1 -Site Geology -Decomposed Granite and Intermixed Material <br />According to the U.S. Department of Agriculture (1975), soil types in the project area consist of <br />Duffson Series (Spring Creek Stony Loams) and Stony Rock Land. The Duffson Series (Spring <br />Creek Stony Loams) is characterized as being well-drained, shallow stony soil with a moderate <br />to high erosion hazard. Stony Rock Land is characterized by exposed bedrock, loose stones, <br />boulders and soils that are very shallow, with a high content of loose stones, over bedrock. <br />Impacts of Alternative A, No Action, on Geology and Soils <br />Under Alternative A, No Action, the Dickerson Pit would not expand beyond the current 12.4- <br />acre limit. Impacts on geology and soils in the analysis area would continue until the operator <br />has reached the 12.4-acre limit. Current operations at the pit that contribute to impacts on <br />geology and soil are blasting, heavy equipment operation, vehicle traffic, and the possibility of <br />leaks or spills of hydrocarbon products used on site. <br />Blasting and removal of the mineral material would result in direct, localized, long term, adverse <br />impacts to both geology and soil, but is an unavoidable impact, given the nature of the <br />operation. Vehicles used during mining operations and for removal would compact the soil. <br />These vehicles could drip or leak motor oil, coolant, and other lubricants. The intensity of <br />impacts would be variable, depending on the number of vehicles entering the pit on a given day. <br />Impacts would be highest during the summer months when extraction is the highest. <br />Mitigation of impacts would be accomplished with sediment control structures (including berms, <br />ditches, and sediment basins), maintaining access and haul roads to limit erosion, and <br />40 <br />