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15,-May 2007 <br /> AGE=NC-07-1522 . : <br /> Page.4 of 5 <br /> Ylioring at 30-minute intervals.Additional waterwas added to:each boring if required to ensure that, ' <br /> approximately 6-inches of water remained..Water.level"was measured from a fixed reference.point <br /> -.on the PVC casing using a solinst water level meter.Measurements indicated on the Percolation Test <br /> Rate form are-in decimal feet.:The final 30=minute intervalwas observed by 1VIs.Lisa Medina of the <br /> SJCEHD. After completion ofthe test Ms: Medina'reviewed the field data and signed the required <br /> SJCEHD Percolation Test Rate form.Based on the field measurements.collected;percolation:rates' <br /> :for the parcel was calculated acid summarized in Table.2 below;field measurements recorded during. <br /> _the test are included on the Percolation Test Rate Field Sheet provided in Appendix B.The SJCEHD <br /> Onsite Wastewater Treatment System-Per_mit:forthe percolatio_n'test.for test holes_TH-1 and TH-2 <br /> am included as Appendix B. <br /> Table 2 <br /> TEST HOLE PERCOLATION RATES <br /> r <br /> Test No. Diameter of Hole Depth of Haley Percolation Ra#e <br /> u><ches <br /> TH 1 _.40 25:00. <br /> TH-2 4 68 •8.93 <br /> A0 '' .CONCLUSION <br /> Based on the data collected-from the site, AGE concludes <br /> The procedures used to conduct percolation tests for test holes TH-1 and TH-2 conformed <br /> to SJCEHD Policy 02-02. <br /> '�• The soil sample collected from TH-2 consisted of soils ranging from silty sands to hardpan <br /> clays _. <br /> The data collected from the,'percolaiion test indicates a suitable percolation rate of 25.00 <br /> minutes per,inch (rriin/in):`The data collected.from the second percolation test indicates a <br /> suitable percolation rate.8.93 min/in.Based on the data there are areas within the parcel(e.g.; <br /> -in the vicinity of the.percolation tests) that should be suitable for onsite sewage disposal <br /> systems: <br /> 4Based on the approximated depth to ground water in the area;and the size"of he parcel, it is our <br /> opinion'that.a'properly,installed-septic system should perform and may not adversely affect the <br /> quality of the groundwater in'the area. <br /> Advanced GeoEnvironmental,Inc. <br />