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SIERRA TESTING LABORATORIES, INC. <br /> GEOTECHNICAL AND MATERIALS YESTING SERVICES <br /> 7 August 2003 <br /> Horizon Environmental, Inc <br /> 5011 Golden Foothill Parkway, Suite 7 <br /> El Dorado Hills, CA 95762 <br /> Attention Mr Rex Smith <br /> Subject ZiE Auto <br /> Job # 179212 <br /> LABORATORY TEST RESULTS <br /> Dear Mr Smith <br /> As requested, Sierra Testing Laboratories, Inc has performed laboratory testing on three <br /> samples of maternal from the subject site The samples were identified MW 1-35, MW 1-48, MW 1- <br /> 55, and were received by our lab on 25 July 2003 The tests performed on the submitted samples <br /> were as follows <br /> 1) Moisture Content & Density (ASTM D2937) <br /> 2) Flexible Wall Permeability 1 4"-3 0" sample diameter (ASTM D5084) <br /> 3) Organic Content(ASTM D2974) <br /> 4) Porosity by Phase Relation <br /> The results of the tests are presented on attached figures <br /> We appreciate the opportunity to be of service to you on this prosect and look forward to providing <br /> additional service, as needed, in the future <br /> Should you have any questions or require additional information, please contact our office at your <br /> convenience <br /> Very truly yours, <br /> Chad M Walker <br /> Project Manager <br /> 5040 Hobert J Mathews, Suite 1, EI Dorado Hills, CA 95762 (916) 939-3460 Fax (916) 939-3507 <br />