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V February 25, 2002 <br /> Job Number:LGO1-397 <br /> Page 8 <br /> V <br /> were drilled utilizing a 4-inch diameter truck mounted auger rig. The casing used or the test was <br /> 2-inch diameter PVC pipe with an open end on the top and bottom. Perforations were made on <br /> ` approximately the last 12 inches of the casing. Six(6) inches of"pea gravel"was placed in the <br /> bottom of the hole, the casing was installed, and one(1) foot of"pea gravel"was backfilled in <br /> the annular space. The percolation test borings was pre-soaked 24-hours prior to the test. <br /> A four(4)hour percolation test was conducted for each hole. The percolation tests were <br /> observed by Mr. Larry Godinho of the San Joaquin County Environmental Health Division on <br /> December 11, 2001. Both of the percolation tests did not achieve a satisfactory percolation rate. <br /> Percolation Test: Potential new septic system site located along Jack Tone Road <br /> Two (2) soil borings were drilled on new property obtained through the lot line <br /> adjustment in an orchard located north of the Chinchilo Fruit Company facility along Jack Tone <br /> Road. The borings and percolation tests were excavated to evaluate the suitability of the soils for <br /> use with a potential new septic system. Plate I identifies the location of the two borings. The <br /> borings set at a depth of 19 feet and a depth of 3.5 feet. The following boring log describes the <br /> ` soils and the depth which the two percolation test holes were drilled. <br /> Table 5. <br /> Soil Boring Log B4 and B-5. <br /> (Unified S ' lassification System) <br /> Depth(FI) B 4 B-5 <br /> 0-5 Dark browns silt with clay(ML). Dark brown san y y(ML). <br /> 3.5 feet <br /> 5-8 Light brown sandy silt with clay(ML). <br /> 8-10 Light brown silty f.to m.sand,dry. (SW) <br /> 10-16 Brown silty sand(SW). <br /> 16-21 Light brown sandy silt(ML). <br /> 21-22.5 Light brown silt with sand <br /> ` TD=22.5,Hole caved in KI9 feet. <br /> Note:TD=Total depth of boring or percolation test <br /> r <br /> OE9S0 <br /> i <br /> O " <br /> _ �SSCOE' <br />