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May, 05 2006 0: 21AM HP LASERJET FAX P. 1 <br /> i <br /> GEOTECHNICAL <br /> NEIL 0. ANDERSON ENVIRONMENTAL <br /> AND ASSOCIATES INSPECTIONS & TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> POST TENSION DESIGN <br /> May 3, 2006 <br /> Mr. Bill Seeds <br /> 5423 Black Oak Drive <br /> Morada, CA 95210 <br /> Subject: Geotechnical Consulting Letter <br /> Seeds.Shop and Septic System <br /> 5423 Black Oak Drive <br /> Morada, California <br /> Project Number: LFG0133 <br /> Dear Mr. Seeds: <br /> We are pleased to provide the requested consulting for the new shop that will house <br /> your motor home. The purpose of our visit was to determine how close the structure <br /> could be located to the leach filed system. The following presents our <br /> recommendations. <br /> An engineer visited the site on April. 26, 2006 to observe the orientation of the teach <br /> field and the proposed location of the shop. The leach field can introduce moisture <br /> into the surrounding subgrade soils. The subgrade soils are clayey and subject to <br /> volume changes with variations.in moisture content. The specified building setback <br /> from leach fields is 10 feet according to the San Joaquin County Environmental Health <br /> Department. in order limit the introduction of excessive moisture near the shop, the <br /> following recommendations should be followed. <br /> Where the proposed foundation is within the required 10 foot setback, a moisture <br /> barrier shall be provided between the structure and the leach field. A trench shall be <br /> excavated a minimum of 48 inches deep and carried horizontally until the structure, is <br /> at least 10 feet from the leach field. A minimum 15 mil visqueen shalt be draped into <br /> the excavation. All laps shall be a minimum of 24 inches. The excavation may then. <br /> be backfilled. This barrier should help limit the intrusion of excessive water near the <br /> foundation. <br /> LORI a SACRAMENTO a MO.DESTO <br /> CORPORATE O F FI t E 902 IndUStrial Way,Lodi,California 05240 is 209.357.370.1 x PAx 249.333.8303 w www.noandcrsttn.emn <br />