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07/26/2007 15:51 20983FA675 2098350675 PAGE 03 <br /> Bright Development 7851.4.001.01 <br /> APN 240-040-02, 24832 South Lammers Road July 26, 2007 <br /> SOTL SUITABILITY STUDY ADDENDUM Page 2 <br /> 6.0 PERCOLATION TEST INFORMATION <br /> 6.7 Potential.Problems <br /> Insert the following at the end of the section: <br /> Low percolation rates were obtained from the upper clayey soils on each parcel.. Based <br /> on our previous explorations in the site vicinity, the upper clayey soils are typically <br /> underlain by sandy soils with higher permeability. Therefore, depending on the depth to <br /> groundwater, deeper percolation tests (e.g., 5 to 10 feet bgs) may result in acceptable <br /> percolation rates and, if so, a seepage pit may be an appropriate disposal .field design. <br /> Alternatively, we understand that an engineered septic system can be designed to the <br /> satisfaction of the SJCEHD. The final system will need to be based on additional <br /> acceptable percolation tests located at the planned disposal area. <br /> Document Attachments: <br /> We have revised the Percolation Test Rate form for the proposed Parcel C (attached) to reflect <br /> the test hole diameter for test C2. <br /> Please let us know if you require additional information. We look forward to working with you <br /> on this project. <br /> Very truly yours, <br /> ENGEO INCORPORATED <br /> , <br /> Jason Preece, CEG Duncan Hickmott, CEG <br /> •-Q�aFESSIpj��., <br /> J sef Tootle, GE Na. 2677 A <br /> JP/ac <br /> Attachments: Percolation Test.Rate Fomi F 0fF CA� <br /> cc: 1 ,Mr. Mike Huggins, San Joaquin County Environmental Health Department <br />