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i< 7 F. uses of land ins the vicinity, where irrigated, include orchards, row cro s, and alfalfa. Non- irrigated land is used for hay and livestock grazing. _F Soils - Phase 1 A first area intended for mining is designated as Phase I and located southwest of Highway 580. This area is non-irrigated with the native vegetation being mainly annual grasses and forbs. A r few locations support riparian trees and shrubs. The soils are associated with Hospital Creek and are designated as Class VII soils. Soils of this class have very severe limitations that make them unsuited to cultivation and restrict their use largely to grazing, woodland, or wildlife. These soils do not qualify as Prime Statewide or Uni ue designation. - The soil unit for this area is described as a Xerofluvents-Xerothents complex (Soil Survey of San Joaquin County, 1992, SCS). These are complex coarse texture soils with very low or low available water capacity and rock fragments in the surface layer. The content of rock fragments ranges from 5 to 65 percent throughout the profile. The surface 4 to 6 inches is 20 percent gravel to 25 percent gravel and 15 percent cobbles. These soils are on alluvial fans, interchannel bars in intermittent stream channels, and in areas of gravel tailings deposits associated with previous aggregate mining operations. } The soils in Phase I are considered to be relatively young and still subject to geologically change by scouring, channelling, and deposition. The soils are subject to occasional, brief periods of flooding from December through March. During periods of flooding or stream flow, the areal character of these soils is frequently changed. The soils are generally shallow to deep, on interchannel bars and alluvial fans or terraces adjacent to intermittent stream channels and drainways. 7 , Field investigation of the Phase I soils consisted of 4 randomly placed backhoe pits. The pits were dug to a depth of 48 to 54 inches. The surface of the soil is covered with a thin layer (t 1 inch) of detritus or undecomposed plant matter A horizon). A layer of organic debris partially decomposed or matted (Aa horizon) forms a layer of 1 to 4 inches, although the depth will vary across this phase of the project. Beneath these two horizons is a poorly defined surface soil with rock significant fragments (A, horizon) which ranges f'om 2 to 4 inches in .,� depth. The textural characteristics of this surface soil vary widely -- san , loamy sand, sandy A loam, silt loam, gravelly sand, gravelly loamy sand, gravelly sandy loam, gravelly loam, or gravelly clay loam. The soil of this phase have very severe limitations that make it unsuitable for cultivation. This soil is not cultivated. Soils - Phases II III and d IV The dominant soil, a gravelly clay loam (Zacharias series), covers about 267 acres (82 percent) of this area. Within this soil unit are about 23 acres (6 percent) of gravelly sandy Ioam (Cortina series) and about 47 acres (12 percent) of clay loam (Zacharias series). 3 Report Rev.2-0620.95 G AGRO ENVIRONMENTAL SERVICES A Division of Condor Earth Technologies, Inc. Condor [ Y