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KLEINFELDER <br /> File No. 20-3644-01 <br /> July 29, 1993 <br /> Mr. Emile Atwood <br /> 9025 West Lane <br /> Stockton, CA 95210 <br /> Subject: PERCOLATION TESTS <br /> PROPOSED HEATHER MOOR ESTATES, UNIT I <br /> SAN JOAQUIN COUNTY, CALIFORNIA <br /> Dear Mr. Atwood: <br /> This letter presents the results of percolation testing performed for the Heather Moor Estates Unit <br /> No. 1 subdivision located between Eight Mile and Quashnick Roads, northeast of Stockton in <br /> San Joaquin County,California. Reference is made to our septic system suitability study report <br /> dated June 30, 1992, which was prepared for the subject subdivision. <br /> Eight percolation tests were performed for our June 1992 report, three of which are located on <br /> lots included in the Heather Moor Estates Unit No. 1 subdivision. This letter presents the results <br /> of percolation tests performed on the four lots of Unit No. 1 where percolation tests were not <br /> performed. <br /> Percolation test holes were drilled and set up on July 20, 1993, using a truck-mounted drill rig <br /> equipped with 6-inch diameter, continuous-flight augers. The test holes had a diameter of <br /> approximately 6 inches and extended to depths varying from approximately 9 to 14 feet below <br /> the existing ground surface. - The test holes were cased with slotted PVC pipe to avoid <br /> disturbance to the soils when water was poured into the pipe. <br /> The percolation tests were performed on July 21 and 22, 1993 by a representative of our firm. <br /> The test holes were filled with approximately 3 feet of relatively clean water the day before the <br /> tests were performed and left to soak overnight. Our representative returned to the site to <br /> perform the percolation tests in accordance with guidelines outlined by San Joaquin County. The <br /> last 30 minutes of each test were used to calculate the percolation rates and were observed by <br /> a County sanitarian. The results of all the percolation tests performed for the Heather Moor Unit <br /> No. 1 subdivision are presented on Table I, included with this letter. The County approved <br /> percolation test sheets for the four tests performed at this time are also included with this letter. <br /> Copyright 1993 Kteintelder, Inc. <br /> KLEINFELDER 2825 East Myrtle Street, Stockton, U 95205 (2091 948-1345 <br />