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07/27/2007 11:43 20983Fa;75 2098350675 PAGE 03 <br /> Bright Development 7851.4.001.01 <br /> APN 240-040-02, 24832 South.Lammers Road July 26, 2007 <br /> SOIL SUITABILITY STUDY ADDENDUM Revised July 27, 2007 <br /> Page 2 <br /> 6.0 PERCOLATION TEST INFORMATION <br /> 6.7 Potential Problems <br /> Insert the following at the and of the section: <br /> Based on the failed percolation rates obtained and our knowledge of the site soils,it is our <br /> opinion that these parcels will require engineered septic systems to mitigate the slow <br /> percolating soils. The failed percolation rates were obtained from the upper clayey soils <br /> on each parcel; however,based on our previous explorations in the site vicinity,the upper <br /> clayey soils are typically underlain by sandy soils with higher permeability. Therefore, <br /> deeper percolation tests may result in acceptable percolation rates and., if so, it is possible <br /> that a standard septic system may be suitable. <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 /> Jason Preece, CEGDuncan Hickmott, CECT _ <br /> T <br /> No. 2877 <br /> EXI 6/30/2008 <br /> Josef Tootle, GE <br /> jp/ac <br /> Attachments: Percolation Test Rate Form <br /> cc: 1 —Mr. Mike Huggins, San Joaquin County Environmental Health Department <br />