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HE <br />TWINING. <br />LABORATORIES, INC. <br />ANALYTICAL CHEMISTRY • ENVIRONMENTAL SERVICES <br />GEOTECHNICAL ENGINEERING • SAMPLING SERVICES <br />CONSTRUCTION INSPECTION & MATERIALS TESTING <br />January 3, 2005 <br />San Joaquin County Environmental Health Department <br />304 East Weber Avenue, 3' Floor <br />Stockton, California 95202 <br />Attention: Mr. Michael Infurna <br />Re: 9505 North West Lane <br />Stockton, California <br />Mr. Infurna: <br />F93808.01 <br />RECEKEll <br />JAN 0g 2005 <br />SAN JOAQUIN COUNTY <br />ENVIRONMENTAL HEALTH DEPT. <br />The Twining Laboratories, Inc. (Twining) has prepared this work plan to propose procedures for a <br />limited soil sampling and analysis at the above referenced site. The purpose of this sampling and <br />analysis plan is to assess imported fill soil for potential impacts from constituents of environmental <br />concern. This work plan was commissioned by Mr. Robert Silvano, Construction Project Manager <br />for Lodi Unified School District (client). Mr. Silvano can be contacted at 1305 East Vine Street, <br />Lodi, California, telephone number (209) 331-7219. <br />This work plan was prepared by The Twining Laboratories, Inc. (Twining), Environmental and <br />Geological Services Division. <br />BACKGROUND <br />Fill soil was imported to the site at 9505 North West Lane in Stockton, California to backfill an area <br />that had been over-excavated during construction activities. The excavation that was backfilled with <br />imported fill material covered an area approximately 150 feet long by 80 feet wide to depths between <br />8 and 12 feet below site grade (bsg). Sampling and analysis of the imported fill soil was requested <br />since the source of the imported fill material is unknown. <br />SITE DESCRIPTION <br />The site is located at 9505 North West Lane in Stockton, California (Assessor's parcel number 084- <br />060-05). The site is located in Section 11, Township 2 North, Range 6 East, Mount Diablo Baseline <br />and Meridian. Drawing 1 is a site plan showing the approximate location of the backfilled <br />excavation and proposed sampling locations. <br />CORPORATE MODESTO VISALIA BAKERSFIELD MONTEREY SACRAMENTO <br />2527 Fresno Street 5253 Jerusalem Court, Suite E 130 North Kelsey St., *16 3651 Pegssr is Drive, #117 501 Ortiz Avenue 5675 Power Inn Road, Suite C <br />Fresno, CA 93721-1804 Modesto, CA 95356-9322 Visalia, CA 93291-9000 Bakersfield, CA 93308-6843 Sand City CA 93955 Sacramento, CA 95824 <br />(559) 268-7021 (209) 342-2061 <br /> (559) 651-8280 (661) 393-5088 <br /> (831) 392-1056 <br /> (916) 381-9477 <br />Fax 268-7126 <br /> Fax 579-1480 <br /> Fax 651-8288 Fax 393-4643 <br /> Fax 392-1059 <br /> Fax 381-9478