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Soil Suitability Study Joe DaSilva Dairy Buildings Expansion Project leading to them. One(1)permit involved the installation of a leach field. There were nine (9)seepage pit installations varying in diameter from 33"to 36"and twenty-five(25) feet deep. Four 4 of the fifteen 15 ' ( ) ( ) permits reviewed listed the soil type as hardpan. Two{2) of the permits listed the soil as sand loam to hardpan. Two 2 y p ( )permits listed the soil as sandy loam and one(1)other listed the soil as heavy. Six(6)of the permits contained no reference as to soil type. i I { Normits were noted for repairing pairing any of the facilities subsequent to their installation. Ig , SOIL PROFILE TEST: No water was encountered in excavating the Percolation Test Hole used as a Soil Profile Test Hole to a maximum depth of 10.5 feet. See the attached"Field Percolation Data Sheet"and"BuildingPlan"as well as the text of this report for the po specific soil layer, character and location details. p i On the "Field Percolation Data Sheet"included in this report I have noted the soil encountered to be dark clay to a depth of 1.5 feet below the ground surface. Between 1.5 feet and 5 feet below the ground surface I noted the soil to be brown,loamy clay with hardpan existing at 5 feet below the ground surface. Between five(5) feet and ten(10) feet below the ground surface I found the soil to be brown, silty loam. The last six inches below the ground surface to a depth of 10.5 feet I note the soil to be soapstone in appearance. The University of California publication entitled"Soils of San Joaquin County, ' California by Walter W. Weir, dated June 1952, refers to the soil in this general area as 1 being either Madera Sandy Loam which is brown in color or possibly Madera Alamo complex which is dark gray in color. Both of these soil types are listed as having good surface permeability and imperfect subsurface permeability. The"Soil Survey of San Joaquin County,California,United States Department of Agriculture Soil Conservation Service"issued October 1992 lists the soil type in this general area as Madera Sandy Loam and generally grayish brown in color or possibly Merritt Sandy loam generally brown in color. Both of these soils are known for permeability that is slow. The hardpan depth below the ground surface is listed as varying �1 between four(4)and five(5)feet for these two(2) soil types. My findings of the hardpan I$ being at 5 feet below the ground surface agrees with this October 1992 report. i The San Joaquin County Flood Control and Water Conservation Map entitled "Lines Of Equal Depth To Water Wells", dated Spring 1998, shows the water table to be l in excess of one hundred(100)feet below the ground surface. I PERCOLATION TEST: 3 27398 East Dodds Road,ElCalifornia 95320 i? scaon, M SIF 3 ► a �s !E