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e <br /> i hTj KLEINFELDER <br /> inches of fine gravel at the bottom of the borehole. The hole is then pre-soaked with water at <br /> least 24 hours prior to performing the test. The test is performed by adding un to a maximum of <br /> 24 inches of water above the gravel in hole From a fixed reference point, the dropin water <br /> level is measured in approximately 30-minute intervals for four hours, refilling as necessary to <br /> maintain the prescribed amount of water over the gravel. Under the observation of a sanitarian <br /> from the San Joaquin County Public Health Services, Environmental Health Division <br /> (SJCPHS/EHD), the last 30-minute reading of the four hour period is recorded and used to <br /> calculate the percolation rate in minutes per inch. The estimated percolation rates are <br /> summarized below. A copy of our field percolation test results signed by a representative from <br /> SJCPHS/EHD is attached. The August 28 inspection was performed by Steven Shih and the <br /> September 9 inspection by Johnny Yoakum. <br /> Percolation Rate <br /> Test Number Date Depth, ft. min./inch <br /> 1 Parcel 1 P-3 8-28-02 25 4 <br /> Parcel 1 P-3 8-28-02 10 28 <br /> Parcel 2 P-1 8-28-02 24 83 <br /> Parcel 2 P-2 8-28-02 5 250 <br /> ,L Parcel 2 P-3 9-9-02 24 6 <br /> Parcel l P-4 9-9-02 23 23 <br /> Parcel 3 P-4 8-28-02 15 12 <br /> Parcel 4 P-1 8-28-02 24 63 <br /> Parcel 4 P-2 8-28-02 5 250 <br /> y Parcel 4 P-1 9-9-02 25 5 <br /> Parcel 4 P-2 9-9-02 24 31 <br /> It was assumed that the percolation test results are representative of the subsurface conditions in <br /> the general area of the tests. Based on these results, it is our opinion that a conventional system <br /> with seepage pits at the end of the leach line can be used on this property. Due to the variability <br /> of the soils encountered at this site, we recommend that seepage pits extend 25 feet below grade. <br /> This completes the scope of work requested. Our work was performed in general accordance <br /> with the standard of care that exists in San Joaquin County. No other guarantee or warranty, <br /> expressed or implied, is made. <br /> Respectfully submitted, <br /> Q,OFESS�O <br /> �Q Q N9l OQRCFESSfo��q! <br /> KLEINF LDER, LO&T� FZ Review d by:co <br /> tiv SpY �yc <br /> No.64089 Z �° m <br /> d 2 EXP.9-06 rn N!. <br /> * od Exp. 3-3143Ronald E. L tze iser, C. 9�F C/vl\, P Ron Heinzen, G.E. c <br /> Staff Professiona OF CAUESenior Principal F0 CA��F� <br /> REL:lr Attac ents <br /> 20744.G01/ST03R374 February 28,2003 <br /> ©2003 Kleinfelder,Inc. Page 2 of 2 <br />