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Soil Suitability Study MS-91 -05 ground surface. The second layer from 2 feet to 10 feet below the ground surface is a brown , clayey loam material . No water was encountered in excavating to the 10-foot depth . No water depth is shown in the area of the subject property on The San Joaquin County Flood Control And Water Conservation Map entitled Lines Of Equal Depth To Water Wells" dated Fall 1990 . Percolation Tests : Three percolation test holes were excavated to about a 3-foot depth . Test Hole No. 1 is on Parcel No . 1 and Test Hole Nos . 2A and 2B are on Parcel No . 2 . Test Hole No. 2B was abandoned after excavation and not tested as a part of this study due to the clayey , adobe nature of the soil . The location of the percolation test holes are shown on the attached "Parcel Map" . All percolation tests conducted were performed in accordance with the percolation test procedures outlined in the "Manual Of Septic Tank Practice" , published by the Department Of Health Education And Welfare and the requirements of the San Joaquin County Public Health Service , Environmental Health Division. On September 3 and 4, 1991 , two (2) percolation tests were performed on the subject property under my direction in conformance with San Joaquin County Public Health Service , Environmental Health Division regulations and San Joaquin County Ordinance Code Standards . Percolation Test Hole Nos . 1 and 2A resulted in the percolation rates and the determinations shown on the attached "Field Note Sheets" and summarized as follows : Parcel No . Test Hole Percolation Rate Minimum Usable No . (Minutes Per Inch) Disposal Area (Square Feet) 1 1 60 12 ,000 2 2A 12 8 ,000 Recommendations : 12 ,000 sq . ft . and 8 ,000 sq . ft . minimum usable disposal areas are recommended for Parcel Nos . 1 and 2 respectively to accommodate subsurface horizontal leaching fields . 3 Delbert Barrow