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June 11,2003 <br /> Job Number:LG03-137 <br /> :F , Page 6 <br /> drop'of water in ihepercolation test boring. Approximately' inches of"pea gravel"was placed <br /> in the bottom of the boring then the PVC pipe was installed on top of the gravel. Several feet of ' <br /> ea avel"was backfilled'in the annular s ace. Prdsaturatiori of the percolation test hole" <br /> occurred on June 3, 2002. Measuremenf of the water level during the percolation test was.f7dm a <br /> fixed reference point on the PVC casing using ari electric well sounder with an depth accuracy of . <br /> 11100th foot- All values on the field data sheet are in decimal feet.. <br /> A 4-hour-percolation test was conducted on June 4, 2003 in accordance with-the-requirements of <br /> San Joaquin County Environmental Health Division. The last %hour of the test P-1 was <br /> observed by JustinEess, Environmental Health Inspector;of that office. A satisfactory <br /> percolation rate for a shallow,(3-foot deep)test is 60'min/in or.less. -The percolation test at P-1 <br />` achieved a satisfactory percolation rate of 7.1 niiri/in. Test P-2 did not achieve a satisfactory, <br /> percolation rate. We believe P-2 was unsatisfactory because the.drilling equipment compressed <br /> _ the soil structure and smeared the sidewalls of the boring." A summary of the percolation testis <br /> presented on Table.5. <br />` ,Table 5. <br /> Summary of percolation test. <br /> Test No., Percolation : Percolation Rate Comment <br />�- Date Tested Test Depth.(ft) (minutes/inch) <br /> P-1,-64-03 3 7.1 Achieved satisfactory percolation rate. . ` <br /> P-2,6-4-03. 3, no movement Unsatisfactory ercolation rate. <br /> f As a result of.the.' ercolation testing>the existing septic sstem-di.s osal area demonstrated.a <br /> satisfactory percolation rate in accordance with.the requirements of the San Joaquin County <br /> '_EDH. <br /> In'addition to the soil'suitability, study, a.nitrate loading study was performed for`ihe'project. The <br /> nitrate loading study provides an estimate of the potential impact.from nitrate to the ground_ <br /> waterr_ <br /> d6SOG♦ . <br />