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�o E R SO NEIL O 4DERSON & ASSOC., INC. <br /> GEOTECHNICAL SERVICES-ENGINEERING LABORATORIES 22 N Houston Ln <br /> Lodi, California 95240 <br /> Z W <br /> Lodi (209) 367-3701 <br /> Stockton (209) 472-1091 <br /> CE S S o G A P R E C F J C 9 FAX: (209) 333-8303 <br /> May 31, 1996 <br /> Ken Boyd <br /> c/o Baumback & Piazza <br /> 323 W. Elm St. <br /> Lodi, CA 95240 <br /> Subject: Deep Pit Percolation Tests <br /> Ford Property <br /> 3890 E Barron Rd. <br /> Acampo, California <br /> Our Job #: S9643 <br /> Gentlemen: <br /> Per your request we have completed performing two (2 ) deep pit <br /> percolation test at the subject project. This letter and <br /> attachments presents the results of our tests. <br /> Test holes were excavated with a truck mounted drill rig <br /> utilizing 4. 5 inch diameter continuous flight auger. For <br /> approximate location of the test holes (PT) see the Parcel Map in <br /> the Appendix. The test holes were logged by an engineer and a <br /> description of the soils encountered in each hole is presented on <br /> the attached Log of Test Holes. Generally, a permeable sand <br /> stratum was encountered at a depth of 10.0 to 15 . 5 feet. For a <br /> detailed description of the soils encountered see the log of test <br /> holes. <br /> Deep pit percolation tests were performed at each of the test <br /> hole locations. The tests were performed within the sand stratum. <br /> Two inches of gravel was placed in the bottom of each 4. 5 inch <br /> diameter percolation test hole. A 2 inch diameter perforated pipe <br /> was then placed in the hole and backfilled with gravel. Each of <br /> the tests holes were filled with water 24 hours prior to running <br /> the tests. The last half hour of the tests readings were witnessed <br /> by a county health official and the test data obtained is attached. <br /> The percolation rates have been adjusted to account for the gravel <br /> and pipe backfill. Calculations for adjustments are on the test <br /> data sheets. <br /> EXHIBIT 7A <br />