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SH KLEINFELDER <br /> ,fin emplovre owned mmpam <br /> File No. 13257.G01 <br /> ` September 18, 2002 <br /> Mr. Ray Takata <br /> Takata Sugioka Kimura <br /> 7311 Greenhaven Drive, Suite 190 <br /> Sacramento, CA 95831 <br /> ` Subject: SOIL SUITABILITY AND NITRATE LOADING STUDY <br /> GRANITE STOCKTON OFFICE ADDITION <br /> FRENCH CAMP,CALIFORNIA <br /> Dear Mr. Takata: <br /> Kleinfelder is pleased to present the results of our soil suitability and nitrate loading study for a <br /> proposed office addition to be located in French Camp, California. The purpose of our study was <br /> to determine the suitability of the property for expansion of the existing leach field and the <br /> _ potential increase in nitrate loading in groundwater from the existing septic system due to waste <br /> generated from the proposed building addition. The study was performed in general accordance <br /> to the requirements of Section 9-10100© of San Joaquin County Ordinance. The following <br /> includes background information regarding the proposed addition and the groundwater depth in <br /> the project area. In addition, discussions regarding our investigative procedures, the site <br /> conditions encountered during our field explorations, and the results of the percolation tests are <br /> �. presented. Finally, the results of our nitrate loading calculations and project limitations are <br /> provided. <br /> ► PROPOSED DEVELOPMENT <br /> On a preliminary basis, we understand that an addition is planned for the existing office building <br /> at the subject 27.12-acre project site. We understand there will be a total of about 50 employees <br /> and up to 20 additional people on site occasionally for seminars. There will be kitchen/break <br /> room facilities on site. <br /> i. <br /> Eeunderstand that wastefromtheproposed additin willbe deposited into an existing on-site <br /> wage disposal system consistingofa eptitand leach trench disposal field. Wederstand thatthe existing leach field willbe expanded, as necessary, to accommodate theditional waste generated from the proposed addition. <br /> L GROUNDWATER DEPTH <br /> At the time of our initial investigation, groundwater was encountered at a depth of approximately <br /> ` 20.5 feet. Lines of Equal Depth to Groundwater contour maps published in groundwater reports <br /> by the San Joaquin County Flood Control and Water Conservation District show groundwater <br /> L 13257.G01/ST02R023 September 18,2002 <br /> ©2002 Kleinfelder,Inc. Page I of 4 <br /> KLEINFELDER 2825 East Myrtle Street,Stockton,CA 95205-4794 (209)948-1345 (209)948-0621 fax <br />