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Soil Suitability Study MS-91-93 elevation between the higherground and the drainage Swale is about 10 . 5 feet . The test hole on the higher ground was dug to a depth of 5 feet and the test hole in the drainage Swale was dug to a depth of 4 feet . Hand tools were used in this excavation and digging to a greater depth was not practical and would have been too difficult because of the hardness of the ground. These excavations were performed at the locations shown on the attached "Parcel Map" . No water was encountered in excavating any of the Soil Profile or Percolation Test Holes . The San Joaquin County Flood Control And Water Conservation Hap entitled "Lines Of Equal Depth To Water Wells" dated Fall 1990 shows the water to be in excess of 50 feet below the ground surface . Information was sought and obtained by the property owner from the well drillers log for the well situate next to the metal building located on the property to the west of the subject property and immediately adjacent to the subject property ' s west boundary. Data from the well drillers log indicated the soil to be a uniform clayey nature material for a depth in excess of 40 feet which was consistent with the brown silty clay material encountered in the subject properties Soil Profile and Percolation Test Hole excavations . Mr . Thompson owns the property immediately to the west and his well was dug by Goehring ' s Pump in Lockeford. Percolation Tests : Four ( 4 ) percolation test holes were excavated to about a 3- foot depth. The location of the percolation test holes are shown on the attached "Parcel Map" . Preliminary filling of the holes with water and recording over a short time period indicated that the percolation rates for the full time period would be marginal . Considering the character of the soil dug for the well on the property immediately to the west and mentioned under "Soil Profile Test " above to be consistent with the soil on this subject property , conducting deep hole percolation tests does not appear to be practical or warranted, so multiple 3-feet percolation tests were conducted to test for consistency and uniformity. As anticipated the results of the tests for the full time period are marginal . 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 August 8 and 9 , 1991 , four (4 ) 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 . David and Barbara Dodson 3