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NEIL O. ANDERSON & ASSOC., INC. <br /> �p R S0 i <br /> GEOTECHNICAL SERVICES-ENGINEERING LABORATORIES 22 N Houston Ln <br /> Lodi, California 95240 <br /> n Lodi (209) 367-3701 ' <br /> Stockton (209) 472-1091 <br /> °y `p ,FAX: (209) 333-8303 <br /> SSOr r' <br /> April 7, 1997 <br /> Ryan Voorhess <br /> CRV Enterprises <br /> 9290 Liberty Rd. <br /> Galt, CA 95632 <br /> Subject: Soil Suitability Study Addendum <br /> Shaylynn Estates, formerly Acampo Estates <br /> 3480 E Calimyrna Rd. <br /> Acampo, California <br /> Our Job #: S9707 <br /> Major Subdivision, SU-92-6 <br /> Dear Ryan: <br /> Per your requests 11 additional percolation tests and a nitrate loading study has been <br /> performed for the subject project. The purpose of these tests and study was to supplement the <br /> original soil suitability study prepared by our office for the subject property'. <br /> i <br /> PERCOLATION TESTS <br /> it was evident from our initial study that shallow percolation tests would not be suitable <br /> I due to the presence of near surface clay and cemented soils. Consequently, 11 deep pit <br /> percolationMte'st holes were drilled, varying in depth from 10 to 20.5 feet deep. Test holes were <br /> logged by an engineer and a description of the soils encountered are presented on the attached <br /> Log of Test Holes. For approximate location of the test holes (PT) see the Location Map in the <br /> Appendix. The previous 3 test holes from our 1991 report have also been shown on the location <br /> map. <br /> Deep pit percolation tests were performed at each of the test hole locations. Each of the <br /> test holes were 4.5 inches in diameter. Two inches of gravel placed in the bottom of each hole <br /> followed by a 2.5 inch diameter perforated pipe backfilled with gravel in the annular space. Each <br />' test hole was filled with water 24 hours prior to running the tests. The last half hour of test <br /> readings were witnessed by a county health official and the test data obtained is attached. The <br /> percolation rates have been adjusted to account for the gravel and pipe backfill. Calculations for <br /> adjustments are on the test data sheets. <br /> i Soil Suitability Study, Acampo Estates, 3480 E Calimyrna Rd., Acampo, CA, Neil O. Anderson & <br /> Associates, Inc., 59157, December 27, 1991. <br />