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File No.: 20-2253-02 <br /> May 5, 1988 <br /> rTa,��n•"9, "�d� <br /> r" <br /> Blatt Development <br /> 7883 North Pershing Avenue <br /> Stockton, California 95207 <br /> ENVIK '� E tal HEALTH <br /> Attention: Mr. Bob Massengale FER,vli/SEtWICES <br /> Subject: PERCOLATION TESTS <br /> JOHNATHON ESTATES/HILDRETH LANE <br /> SAN JOAQUIN COUNTY, CA/SU-87-20 <br /> Gentlemen: <br /> As requested, a representative of our firm performed si percolation tests at <br /> the subject site. Percolation tests were performed at he approximate locations <br /> shown on the attached site plan, Plate 1. <br /> The percolation test holes were drilled and set-up on April 26, 1988, using <br /> 6-inch diameter continuous flight auger. Approximate 25-foot deep borings were <br /> drilled at the proposed locations of the leach fields on lots 2 through 7. <br /> Continuous logs of the soils encountered were maintained and are included as <br /> Plates III through VIII. All soils have been classified according to the <br /> Unified Soils Classification System, presented on Plate H. <br /> On May 4, 1988, a representative of our firm returned to the site to perform the <br /> percolation tests. Tests were performed according to San Joaquin County guide- <br /> lines and the last 30 minutes of each test was observed by a County Health <br /> Officer. The percolation test holes were measured to have percolation rates of <br /> from 4 to 15 minutes per inch. A summary of the percolation test results is <br /> presented in Table I and the county approved field work sheets are attached. <br /> If you have any questions or need additional information, please contact us. <br /> Respectfully submitted, <br /> KLEINFELDER <br /> Patrick C. Dell, C. E. <br /> SRD:rls <br /> MD58/cc w/Attachs.: San Joaquin County/Dillon Engineering <br />