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1-10_.DRECJE & KUL <br /> <br />CONSULTING ENGINEERS . GEOLOGISTS <br />Project No. 1671-01 <br /> 'ELIVEL <br />July 18, 2002 <br />JUL 2 9 Z002 <br />ENVIRORMENT HEALTH <br />PERMIT/SERVICES <br />Mr. George Baranoff <br />Castello Estates <br />P.O. Box 150468 <br />San Rafael, California 94915-0468 <br />Reference: Castello Estates <br />Linne and MacArthur Roads <br />San Joaquin County, California <br />Subject: Percolation Test Results <br />Dear Mr. Baranoff: <br />This letter presents our percolation test results for the two test pads constructed at the <br />Castello Estates project site in San Joaquin County, California. We understand that the <br />percolation tests were requested in an effort to evaluate the suitability of the test pad soil <br />for use in the disposal bed and berm. Copies of this letter report will be forwarded to 7H <br />Technical Services, the wastewater design consultant. <br />We previously provided percolation testing and mantle observation of native soil within the <br />disposal area, as described in our July 6, 2000 letter report. In addition, we presented <br />preliminary recommendations regarding disposal berm soil requirements in a letter dated <br />October 5, 2000. <br />Percolation Testing <br />Two test pads were constructed prior to our arrival onsite by Teichert Construction, the <br />project grading contractor. According to the contractor's representative, one of the test <br />pads (TP-1) was constructed to an approximate thickness of 24 inches using a mixture <br />containing approximately 50 percent granular soil from onsite and 50 percent imported <br />granular soil. The other test pad (TP-2) was constructed using granular soil from onsite. <br />The approximate test pad locations are depicted on Figure 1. <br />(530) 478-1305 • FAX (530) 478-1019 • E-mail: handk (FlandiCnet • 792 Searls Avenue • Nevada City, CA 95959 • A California Corporation