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KLEINFELDERME <br /> File No. 20-2182-24 RKEIV <br /> April 11, 1990 MAY 3 1 1990 <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> Taylor Development <br /> 6333 Pacific Avenue, Suite 374 ��- <br /> Stockton, CA 95207 <br /> f= <br /> Attention: Mr. Norm Taylor <br /> Subject: PERCOLATION TESTS / <br /> PROPOSED LEE ESTATES SUBDIVISION <br /> EAST OF STOCKTON <br /> SANA-Q"IN COUNTY, CALIFORNIA <br /> U-90-18 ) - <br /> Gentlemen: <br /> Presented in this letter are the results of percolation testing performed for the <br /> propos6d Lee Estates subdivision o be located east of White Lane and south of <br /> Highway 88, east of Stockton in San Joaquin County, California. Reference is made to <br /> our geotechnical investigation report dated February 20, 1990. <br /> One approximate 3-foot deep percolation test was performed on each of the 9 proposed <br /> lots for our February 20, 1990 report. Three of the lots produced passing tests <br /> according to San Joaquin County requirements. This letter presents the results of <br /> deeper percolation tests performed on each of the 6 lots where failing tests occurred. <br /> The percolation test holes were drilled and set up on April 2, 1990 using a truck- <br /> mounted drill rig equipped with continuous-flight augers. The test holes had a <br /> diameter of approximately 6 inches and extended to depths varying from approximately <br /> 8 to 14-1/2 feet below existing ground surface. The test holes were cased with <br /> slotted PVC pipe to avoid disturbance of the soils when the water was poured into the <br /> pipe. The percolation tests were performed on April 4, 5, and 6, 1990 by a <br /> representative of our firm. The test holes were filled with approximately 3 feet of <br /> relatively clean water the day before the tests were performed and left to soak <br /> overnight. Our representative returned to the site to perform the percolation tests in <br /> KLEINFELDER 2825 East Myrtle Street, Stockton, CA 95205 (209) 948-1345 <br />