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r72 <br /> The sandy loam soil structure of the project surface soils (< 6 ft in depth) is only partially <br /> be <br /> for the processes of NH4' adsorption and microbial incorporation for cellular synthesis. <br /> TABLE 1 <br /> SUMMARY OF SOIL ANALYSIS <br /> DEPTH OF SAND SILT CLAY SOIL DENSITY USDAIUSCS NITRATE-N <br /> SAMPLE % % % SOIL TEXTURES CONTENT <br /> 0 Ft 53% 32% 14% NIA Sandy Loam/3andy Silt 14 ppm <br /> 5 Ft 39% _ 46% 14% 36 Blows/Ft Loam/Silty Lean Clay 7 ppm <br /> Dense Density <br /> 10 Ft 89% 4% 6% 25 Blows/Ft Sand/Poorly-Graded 6 ppm <br /> Medium Density Sand y <br /> 1 <br /> 15 Ft 93% 2% 4% 37 Blows/Ft Sand/Poorly-Graded 5 ppm <br /> Dense Density Sand <br /> 20 Ft 75% 14% 10% 65 Blows/Ft Sandy Loam/Silt 12 ppm <br /> Very Dense Density <br /> 25 Ft 11% 52% 36% 54 Blows/Ft Silty Clay Loam/Silty clay 10 ppm <br /> Hard Density <br /> 2. PERCOLATION TESTING <br /> /Percolation testing was conducted on proposed Parcel 4, where previous percolation testing <br /> conducted by Morlan Civil Engineering indicated failing test results. The test site is denoted on <br /> the Tentative Map produced by Morlan. The following information describes the preparation of the <br /> percolation test borings and the actual pere testing: <br /> On December 15, 2004, one shallow pert test boring, one medium depth boring and one deep test <br /> boring were drilled in the above-referenced location. The sidewalls of the shallow and medium <br /> borings were scored with a pry-bar and the loose material removed. Two inches of fine gravel was <br /> .placed at the bottom and three-inch perforated PVC pipe was inserted. <br /> On January 18, 2005, all three test borings were pre-saturated at 0900 hrs with 12 inches of water, <br /> approximately 24 hours before the start of testing. <br /> On January 19, 2005, 0930 hrs, percolation testing commenced for the three test borings. There was <br /> no standing water in the three borings after the 24-hour soak period, as depicted in the Table below. <br /> Consequently, EHD Pere Test Procedure#2 was conducted for these borings over four hours to <br /> document the acceptance and management of water over this four-hour test period. The last half- <br /> hour of the tests was witnessed by Lisa Medina,R.E.H.S. of the San Joaquin County Environmental <br /> Health Department. <br /> Page -5- <br /> Chesney Consulting <br />