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� 5'W �`i KLEINEELDER <br /> 10 mg/l. The results of our percolation tests indicate that a suitable soil percolation stratum <br /> exists below a depth of about 4 feet. However, SJCPHSIEHD requires that leach trenches extend <br /> a minimum of 18-inches into the percolation stratum while maintaining a minimum vertical <br /> separation of 5 feet from groundwater. Accordingly, conventional leach trenches will not be <br /> suitable for use. <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 /> 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, IRaofESSI <br /> GUIs�� <br /> KLEINFE ER, _ <br /> mo. 22B3 <br /> ry , G. 'F Or n°..Ek��1 <br /> c e ical Department a <br /> REL:lr <br /> Attachments <br /> 12573/2002R320 June 11,2002 <br /> ©2002 Kleinfelder,Inc. Page 4 of 4 <br />