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Area land use in the 1970s is illustrated on the United States Department of Agriculture (USDA) k Aerial Soil Map, and more recently for the year 2000 on the San Joaquin County Parcel Viewer Aerial Photographs. Adjacent land use consists of the following: To the north are the Clements Fire Department and open pasture land; to the south are Lay's Restaurant and unimproved grazing land; to the west is the town of Clements and to the east are farmed pasture land and open grazing land. Over the last several years, vineyards have been planted throughout the Clements area. } Although the town of Lockeford, four miles southwest of Clements, has domestic wastewater treatment, it is doubtful Clements will ever construct a Publicly Operated Treatment Works (POTW) wastewater treatment facility. Consequently, the proposed Chocoholics facility will probably always remain unsewered. No application permits were on file with the County Environmental Health Department for repairs/ additions to existing septic systems in the one-half mile radius study area. This may be attributed to the excellent percolative capacity of the soil in the Clements area, especially near the Mokelumne River. B. SOIL PHYSICAL CHARACTERISTICS AND ANALYTICAL TEST RESULTS l The terrain of the project site is level. A severe hardpan layer forms the soil surface to a depth of approximately 20 inches. This hardpan consists of compacted silts and fine sands with clay as a binder. The United States Department of Agriculture -Natural Resources Conservation Service (USDA-NRCS) indicates the on-site soils to consist of Tokay fine_sandy loam (#256). The Soil Survey information indicates the Tok�ils have moderately rapid permeability. To examine the subsurface soils, a truck-mounted drill rig was used to drill the three percolation test borings, obtain soil samples and to break up the surface hardpan for the double ring infiltrometer test. The first boring was drilled to 42 inches. This boring represents percolation that will occur in a leachline trench. The second boring was drilled to 86.6 inches (7.2 feet) and represents percolation in a sump. The third boring was drilled to 192 inches (16 feet), to represent percolation in a shallow seepage pit. It was decided to terminate the boring at,this depth since the soil was becoming sandier in comparison with the 7.2 foot boring. Soil samples were taken from the bottom of each test boring. As recorded on the attached SOIL ANALYSIS REPORT, the soil textures vary with depth. (Note: the "Sample Number" denotes the 42-inch sample as "3FT" although the test depth was 42 inches; the 7.2 foot boring was mistakenly denoted as "9FT" instead of"7FT;" and the 16 foot boring is denoted as "16FT"). As indicated on the Report, in addition to the sand content increasing with depth, the clay content also increased, which is beneficial in slowing infiltration and percolation of effluent and creating Ea more favorable environment for treatment and denitrification. The soil test results are summarized in the chart below: 3 Chxstw Consulting