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WATER <br /> Water samples were collected by a representative of Roy F . <br /> Weston , Inc . on May 17 , 1991 and tested for Nitrate and <br /> Dibromachloropropane. <br /> The test results indicate that the Nitrate level is at 1 .2 <br /> mg/L and the DBCP level as not detected at the <br /> concentration level of the reporting limit . The lab report <br /> by Roy F . Weston , Inc . is included in this report as <br /> Appendix A. <br /> SOILS AND PERCOLATION TESTS <br /> The "Soils of San Joaquin County , California" as published <br /> by the University of California indicates the predominant <br /> soils type at the site to be Ramona Sandy Loam ( reddish <br /> brown ) or San Joaquin loam ( reddish brown ) . The material <br /> we encountered in digging our b inch diameter by 3 foot <br /> deep percolation test holes was a slightly reddish brown , <br /> heavy sandy material with some clay . <br /> Three test holes were dug on the property and holes #1 and <br /> #2 were pre-tested with the following results: <br /> Hole #1 : Percolation rate of 30 min/inch <br /> Hole #2: Percolation rate of 18 min/inch <br /> On May 2, 1991 a percolation test was ran under permit and <br /> inspection by San Joaquin Public Health Services . The <br /> percolation rate of the test hole was 21 minutes per inch. <br /> The results of the test is attached as Exhibit 5 . <br /> CONCLUSION <br /> Based upon the results of the percolation tests, the <br /> interviews and other data , it is my opinion that the <br /> subject property is suitable for septic systems and that <br /> the use of septic systems should not impact or degradate <br /> the existing water table at the density proposed . I <br /> recommend that 10,000 S.F . for leach area expansion be <br /> reserved South and East of the existing residence. <br />