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KLEINFELDER <br /> percolation rate in minutes per inch. The estimated percolation rates are summarized below. A <br /> copy of our field percolation test results signed by a representative from EHD is attached. <br /> Location Depth, feet Percolation Rate (min./inch) <br /> P-1 3.3 36 <br /> P-1 7.8 21 <br /> P-1 14.1 Not observed by EHD <br /> P-2 3.3 31 <br /> P-2 7.0 14 <br /> P-2 23.6 Not observed by EHD <br /> P-3 3.3 18 <br /> P-3 9.2 25 <br /> Although the site is in an unincorporated county area, it is serviced by public water. According <br /> to the EHD, no nitrate and DBCP analyses were required since the public water systems are <br /> tested quarterly by the EHD. <br /> NITRATE LOADING CALCULATIONS <br /> Per the EHD letter shown to our firm at the EHD office during permitting, only a soil suitability <br /> study is required for this project. <br /> CONCLUSIONS <br /> The results of our percolation tests indicate that a suitable soil percolation stratum exists at a <br /> depth of about 3.5 feet at the locations tested. A suitable soil condition is defined as a stratum <br /> capable of percolating water at a rate of 60 minutes per inch (min/inch) at a depth of about 3.5 <br /> feet or 30 min/inch for deeper tests. Accordingly, a leach trench system designed in accordance <br /> with EHD criteria should be suitable for disposal of waste. <br /> LIMITATIONS <br /> The conclusions of this report are based on the information provided regarding the existing and <br /> proposed development and on the site conditions. It was assumed that the percolation test results <br /> are representative of the subsurface conditions in the general area. <br /> 29556.G01/ST03R877 ]me 18,2003 <br /> 0 2003 Kleinfelder,Inc. Page 3 of 4 <br />