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'+ 18 June 2008 <br /> AGE-NC-08-1612 <br /> Page 9 of 10 <br /> 6.4. DESCRIPTION OF THE PERCOLATION TEST HOLE -POST SOAK <br /> On 28 May 2008,test hole TH-1 was found to be completely dry,but intact and in good condition. <br /> 6.5. PERCOLATION TEST CONFORMED TO SJC POLICY EHD 02-02 <br /> The work was performed under SJCCDD Title Requirements Section 9-1105.2 (d)and as required <br /> by EHD letter dated 09 October 2007. <br /> On 28 May 2008, test hole TH-1 was inspected prior to initiation of the percolation test. The <br /> percolation test was performed by recording the amount of water remaining in the bore hole at <br /> 30-minute intervals. Additional water was added to the test hole as required to ensure that / <br /> approximately 6-inches of water remained. The water level was measured from a fixed reference l <br /> point using a Solinst water level meter. Measurements were taken at 10-minute intervals for four <br /> hours. The final three measurements were observed by the EHD inspector. Based on the field <br /> measurements collected, the percolation rate for the parcel was calculated and summarized in <br /> Table 2. <br /> Table 2 <br /> SOIL PERCOLATION TH-1 <br /> Test No. Diameter of Hole Depth of Hole Percolation Rate <br /> (inches) (inches) (min/in) <br /> TH-1 4 42 2.4 (average) <br /> 6.6. COMPLETED PERCOLATION TEST FORM <br /> After completion of the test,the EHD inspector reviewed the field data and signed the required EHD <br /> Percolation Test Rate form. Field measurements recorded during the test are included on the (p <br /> Percolation Test Rate Field Sheet provided in Appendix C. <br /> 6.7. POTENTIAL PROBLEMS PREDICTED <br /> On-site soils within the shallow percolation test range demonstrated adequate percolation rates. <br /> Additionally,the existing septic system has been properly operating. <br /> Advanced GeoEnvironmental,Inc. <br />