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MAR- 5-96 TUE 17:04 KLEINFELDER FAX N0, 2099480621 P, 02 <br /> File No, 20-2314-02 <br /> May 19, 1989 <br /> Dannor Corporation <br /> 1919 Grand Canal Blvd <br /> Suite 136 <br /> Stockton, CA 95207 <br /> Attention: Dana Smith <br /> Subject: PERCOLATION TESTS <br /> PROPOSED WILLOWS SUBDIVISION <br /> SU-86-8 <br /> STOCKTON, CALIFORNIA <br /> Gentlemen: <br /> Presented in this letter are the results of percolation testing performed for the <br /> proposed Willows subdivision located just south of Eight-Mile Road in Stockton, <br /> California. Reference is made to our previous percolation test reports dated July 28, <br /> and August 12, 1988, and our geotechnical investigation report dated April 18, 1989. <br /> The currently proposed subdivision consists of 23 lots. For our previous percolation <br /> test reports, it was believed that since the property was purchased prior to 1986 it <br /> was only necessary to run one percolation test for every three lots. At the time of <br /> our July 28, 1988 report, the subdivision contained 14 lots and was called North <br /> Morada Estates. Therefore, five percolation tests were performed which produced <br /> passing tests on lots 1, 4, 7, 10 and 13, The subdivision was then expanded to contain <br /> 23 lots and three additional percolation tests were performed and produced passing <br /> tests on lots 16, 19 and 22, for our August 12, 1988 report. The name of the <br /> subdivision has since been changed and the county now requires a percolation test for <br /> each lot. Therefore, the additional 15 percolation tests were performed and the <br /> results are presented in this letter. <br /> The percolation test holes were drilled and set up on February 28, 1989 and May 11, <br /> 1989 using a truck-mounted drill rig equipped with continuous-flight auger. The test <br /> holes had a diameter of approximately 6 inches and extended to depths varying from <br /> approxiamtely 9 to 15-1/2 feet below existing ground surface. The test holes were <br /> cased with slotted PVC pipe and a titin layer of relatively clean sand was placed at <br /> the soil surface within the pipe to avoid disturbance of the soil when the water was <br /> poured into the pipe. The percolation tests were performed between March 7; and <br /> May 18, 1989 by representatives of our firm. The test holes were filled with <br /> approximately 2 to 3 feet of relatively clean water the day before the tests were <br /> performed and left to soak overnight. Our representative returned to the site to <br />