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September 30,2002 <br /> Job Number: LG02-335 <br /> Page 6 <br /> One(1) 3-foot deep soil boring was drilled on the southeast corner of the property to <br /> characterize the shallow subsurface conditions. Essentially the soil encountered was composed <br /> .. <br /> of fine sand with some silt and is similar to the descriptions of the shallow soil in the San <br /> Joaquin Soil Survey. A shallow percolation test was completed within the 3-foot deep sot <br /> boring. Plate 1 identifies the location of the percolation test boring. <br /> The percolation test boring was drilled utilizing a 2.5-inch hand auger drill. The casing <br /> used for the percolation tests were 2-inch diameter PVC pipe with an open end on the top and <br /> bottom. Perforations were made on approximately the last 12 inches of the casing. Two (2) <br /> inches of"pea gravel"was placed in the bottom of the hole, the casing was installed, and one(1) <br /> foot of"pea gravel"was backfilled in the annular space. The percolation test boring was pre- <br /> soaked on August 22, 2002, 24-hours prior to the test. <br /> A one(1)hour percolation test was conducted on each parcel on August 23, 2002. The <br /> percola on test was conducted in accordance with the requirements of San Joaquin County <br /> Environmental Health Division. The last %z hour of the percolation tests were observed by <br /> Johnny Yoakum, Environmental Health Specialist of Ne San Joaquin County Environmental <br /> Health Division. The following table presents a summary of the percolation tests. a Y <br /> ` A one(1)hour"shallow"test was conducted for the percolation hole on August 23, 2002. <br /> The percolation test was observed by Mr. Steven C. Shih, Environmental Health Specialist for <br /> San Joaquin County Environmental Health Division. The following table presents a summary of <br /> ` the percolation test. <br /> Table 3. <br /> Summary of Percolation Tests. <br /> Percolation Test Test Length Test Depth(ft) Percolation Rate(min/inch) Comment <br /> No. <br /> One(1),shallow 1 hr. 3 1.6 Passed Test <br /> A satisfactory percolation rate is less than or equal to 60 minutes per inch(drop) for a <br /> shallow test. A satisfactory percolation test was achieved on the parcel. <br /> �pFFtO <br /> ♦ 4 <br /> i <br /> O � <br /> Ott C��♦ <br />