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Supplemental Soil suitability Study 4 to a depth of 24' -00". Below 24' -00" to a depth of 24'-06" , the soil was noted to be a brown sand. The University of California publication entitled "Soils of San Joaquin County, California" , by Walter Weir, dated June, 1952, refers to the soil in this general area as "San Joaquin Loam". No water was encountered in drilling any of the deep percolation test holes to a maximum depth of 25'-00" . The San Joaquin County Flood Control and Water Conservation Map entitled "Lines Of Equal Depth To Water Wells" , dated Fall , 1990, shows the water to be in excess of 120 feet below the ground surface. As noted and covered in my Soil Suitability Study, dated 2-1-92 for Par- cel Map No. MS-91-67, Parcel Nos. 1 and 2 for the John and Wally Borges pro- perty, under the Soil Profile Test section, the soil profile excavation was performed to a depth of 6 feet with any additional depth to the usual ten ( 10) feet depth being waived by the San Joaquin County Public Health Service, Envi- ronmental Health Division. Percolation Tests : Two (2) percolation tests , one shallow and one deep covering only Parcel No. 1 were performed as a part of this Supplemental Soil Suitability Study. These two percolation tests were conducted on Test Hole No. 1B to about a 3- foot depth, and on Test Hole No. 1C to a depth of 24'-06". The location of these two (2) test holes are shown on the attached "Parcel Map" . A deep percolation test hole, Test Hole No. 1A, was also drilled on Par- cel No. 1 to a depth of 25' -00" at the location shown on the attached "Parcel Map" . By visual inspection, Test Hole No. 1A was abandoned from further test- ing beyond its excavation. Only Percolation Test Holes Nos. 1B and 1C were formally tested and reported on. The percolation test for Parcel No. 2 of this Supplemental Soil Suitability Study is covered under Parcel No. 1 of my Soil Suitability Study, dated Feb- ruary 1 , 1992, Parcel Map MS-91-67, for the John and Wally Borges Property at 26246 North Bruella Road, Galt, California 95632. The location of the perco- lation test hole is shown on the parcel map attached to this above-mentioned report, and was performed to about the 3-foot depth. The results of this per- colation test are incorporated and made a part of this report. 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 require- ments of the San Joaquin County Public Health Service, Environmental Health Division regulations and the San Joaquin County Ordinance Code Standards. On January 23 and 24, 1992, and July 16 and 17, 1992, three (3) per- colation tests were performed on the subject property. One test was perform- ed at about the 3-foot depth on January 23 and 24, 1992, and the other two (2) tests were performed; one at about the 3-foot depth and the other at a 24' -06" depth on July 16 and 17, 1992. Percolation Test Hole Nos. 1 , 1B and 1C resulted in the percolation rates and determinations shown on the attached "Percolation Data Sheets" for this Supplemental Soil Suitability Study and my Soil Suitability Study, C. Ryan Voohees MS-92-84 Parcel Nos. 1 and 2