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EECEff n STRfiTUS p 9 p ENVIRONMENTAL,:INC. AUG 2 4 2009 3330 Cameron Park Drive, Ste 550 Cameron Park, California 95682 ENVIROWENT HEALTH (530)676-6004-Fax:(530)676-6005 PEKMI bL August 19, 2009 Project No. 2033-15688-01 .Ms. Margaret Lagorio San Joaquin County Environmental Health Department 600 East Main Street I Stockton, California 95202 Subject: Destruction of Groundwater Monitoring Wells 15688 South Harlan Road Lathrop, California Dear Ms. Lagorio: ` Stratus Environmental, Inc. (Stratus) has prepared this report on behalf of Mr. Dalwinder Dhoot and the City of Lathrop, jointly, for the property located at 15688 Harlan Road, Lathrop, California (the site; Figure 1). In a letter and Notice of Responsibility issued to Mr. Dhoot and to the City of Lathrop (the City) by San Joaquin County Environmental Health Department (SJCEHD) on September 17, 2007, both Mr. Dhoot and the City were named by SJCEHD as the primary or active Responsible Party for the former underground storage tanks .discovered to straddle the property line between Mr. Dhoot's property and the City's right-of- way. Following the submittal and approval of a work plan, groundwater monitoring wells MW-1, MW-2, and MW-3 were installed at the site in April 2008, and were subsequently sampled in May, June, September, and December 2008. In January 2009, based upon soil and groundwater analytical data gathered during this work, Stratus requested that SJCEHD consider the case for regulatory case closure. In a-letter dated March.27, 2009, the Regional Water Quality Control Board (RWQCB) concurred with SJCEHD's closure recommendation. In July 2009, monitoring wells MW-1, MW-2, and MW-3 were destroyed in accordance with SJCEHD regulations and well standards. This report contains details associated with the well destructions. WELL DESTRUCTION ACTIVITIES Prior to initiating work activities, well destruction permits were obtained from SJCEHD and an encroachment permit was obtained form the City of Lathrop to work in the City's right-of-way. Underground Service Alert, SJCEHD, the City, and the property owner were notified prior to beginning work activities. Copies of the well destruction permits and encroachment permit are provided in Attachment A: All work was conducted under the direct supervision of a State of California Professional Geologist (PG) and was conducted in accordance with SJCEHD regulations and well standards. K:\City of Lathrop\Reports\City of Lathrop—Dhoot Well Destruction Report Aug 2009.doc