SITE INFORMATION AND CORRESPONDENCE

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Rainwater Car Wash Page 2 420 West Yosemite Avenue October 24, 2011 Manteca, California 95337 At the December 1999 meeting, Mr. Elder had agreed to submit a reimbursement request to the State Water Resources Control Board Cleanup Fund (Fund) for work already performed at the site within one week of receiving a Letter of Commitment (LOC) from the Fund, and to initiate the work proposed in the work plan and addendum within one month of receiving reimbursement from the Fund for previous work performed at this site. After twice extending the implementation of the proposed work at the request of Mr. Elder, who claimed financial difficulties, the EHD, by letter dated 13 June 2000, directed Mr. Elder to implement the fieldwork proposed in the work plan and addendum within 14 days of date of the letter, and submit the report of findings, along with a well survey report, to the EHD within 90 days of commencing the work. Between 29 June 2000 and 07 July 2000, monitoring wells MW-1 through MW-5 were installed; Sensitive Receptor Survey, dated 08 September 2000, was submitted to the EHD by AGE; and four cone penetrometer test (CPT) borings, P-7 through P-10, were advanced at the site. On 07 March 2001, another meeting was held that was attended by Mr. Elder and personnel from AGE, CRWQCBCVR, and the EHD. Results from the CPT investigation indicated that the groundwater plume had not been defined vertically or horizontally. Based on the high concentrations of MTBE and other petroleum hydrocarbon constituents detected in groundwater, the EHD directed that interim remediation be implemented immediately. A goal for installing and implementing an interim pump-and-treat system at the site to control the migration of the plume was set for 16 April 2001. To meet this goal, a work plan for a groundwater extraction test, previously directed by the EHD, by letter dated 02 January 2001, was to be submitted to the EHD by 16 March 2001, and include a proposal for installing additional observation monitoring wells/piezometers for the groundwater extraction test. By letter dated 09 March 2001, a report of the March meeting was submitted by the EHD along with directives that all groundwater samples collected in the future for chemical analysis include the complete list of analytes reported by the Environmental Protection Agency (EPA) Method 826013; and a work plan be submitted by 01 June 2001 to define the vertical and horizontal extent of petroleum hydrocarbon contamination at this site. On 30 March 2001, extraction well EW-1 and groundwater observation well MW-6 were installed and on 05 April 2001 AGE performed an aquifer pumping test. By letter dated 27 June 2001, the EHD approved Interim Remediation Work Plan — June 2001, dated 22 June 2001, submitted by AGE for the implementation of groundwater pump-and-treat at this site and by letter dated 24 August 2001, the EHD directed Mr. Elder to install the pump-and-treat system by 30 September 2001. It was not until 21 January 2002 that the groundwater extraction system began operation. On 12 April 2002, the EHD approved the installation of 7 continuous multi-chamber tubing (CMT) groundwater monitoring wells proposed by AGE in Work Plan Addendum, dated 03 April 2002. Between 26 September 2002 and 09 October 2002, CMT monitoring wells MW-7 through MW-13 were installed.