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San Joaquin County DIRECTOR <br /> 0-1, '" <br /> _ Co Environmental Health Department Donna Heran, REHS <br /> 600 East Main Street ASSISTANT DIRECTOR <br /> ): Laurie Cotulla, REHS <br /> Stockton, California 95202-3029 <br /> • PROGRAM COORDINATORS <br /> • �< . — Carl Borgman, REHS <br /> Website: www.sjgov.org/ehd Mike Huggins, REHS, RDI <br /> Phone: (209) 468-3420 Robert McClelloMargaret lelloo, REHS <br /> n, REHS <br /> Fax: (209) 464-0138 Jeff Carruesco, REHS, RDI <br /> Kasey Foley, REHS <br /> CARL KNOWLES <br /> PO Box 640 <br /> WOODBRIDGE CA 95258 <br /> RE: 1140 W HAMMER LANE <br /> STOCKTON CA SITE CODE: 1124 <br /> WORK PLAN: Monitorring Well Destruction and Replacement <br /> DATED: March 12, 2008 <br /> PREPARED BY: Ground Zero Analysis. Inc. <br /> APPROVED- 1X1 <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25296.10 (c)(3)1: <br /> 1 To destroy two monitoring wells that are in the path of the City of Stockton's road widening <br /> project. To overdrill MW#3 and MW#5 and backfill the borings with neat cement, an <br /> approved sealing material, to within 3 three BGS. <br /> 2. To install one MW , preferably less than 20 feet south of MW#5, as a replacement for MW#5. <br /> MW#5 has evidenced gasoline contamination throughout the groundwater investigation at this <br /> site. <br /> 3. To install the replacement MW to a total depth of 55 feet bgs with a 20 foot slotted screen <br /> from 55 feet to 35 feet and 35 feet of solid casing from 35 feet to surface. <br /> 4. To collect selected soil samples for analysis and log the boring prior to MW construction. <br /> 5 To develop, survey, and sample the replacement well within 14 days of installation. <br /> 6. To prepare a Monitoring Well Installation Report with conclusions and recommendations. <br /> COMMENTS AND CONDITIONS: <br /> 1. An EHD permit must be procured and fee paid prior to the work proposed. <br /> 2. A report of finding must be submitted to EHD and CVRWQCB within 60 day of MW <br /> installation. <br /> DATED �S O BY <br /> Harlin Knoll Senior REHS (209) 468-3442 <br /> Cc: Ground Zero Analysis <br /> City of Stockton <br />