SITE INFORMATION AND CORRESPONDENCE

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Rainwater Car Wash Page 3 420 West Yosemite Avenue October 24, 2011 Manteca, California 95337 By letter dated 26 September 2007, the EHD memorialized a meeting between AGE and EHD personnel on 20 April 2007 where remediation activities at this site were discussed. Included in the letter were an approval by the EHD to reduce the frequency of sampling monitoring wells; a directive to determine the impact tetrachloroethene (PCE) and trichloroethene (TCE) peaks, detected in the chromatograms of total petroleum hydrocarbons as gasoline (TPH-g), had on the concentrations reported for TPH-g; and directives by the EHD to submit a work plan to install additional groundwater extraction wells and a vapor intrusion evaluation to the EHD by 26 October 2007. By letter dated 16 January 2009, the EHD approved Addendum to Interim Remediation Work Plan —April 2008, dated 21 April 2008, submitted by AGE for the installation of two extraction wells along with the directives that the two proposed groundwater extraction wells be installed by 27 March 2009 and a site conceptual model (SCM) be submitted by 27 March 2009. The EHD also approved a reduction in the frequency of groundwater sampling. On 14-15 January 2010, extraction wells EW-2 and EW-3 were installed and the SCM, dated 01 June 2010, was submitted to the EHD. On 06 October 2010 AGE notified the EHD that effective 24 September 2010 AGE had temporarily suspended all monitoring and remediation activities since Mr. Elder had notified AGE that he was not able to provide payment for past-due invoices even though Mr. Elder had received reimbursement from the Fund. Mr. Elder has failed to respond to the EHD directives listed in the bullets of this letter when directed to do so by letter dated 01 December 2010. On 28 March 2011, another meeting was held attended by Mr. Elder, AGE and the EHD. At that time, the EHD gave Mr. Elder an additional 75 days to submit a proposal to restart the pump-and-treat remediation system. To date, Mr. Elder has not responded to any of the EHD directives. A chronology is included as an attachment to this letter along with a disc containing work plans and reports dated between 1998 and 2005. If you have any questions please contact Vicki McCartney at (209)468-9852 or by email at vmccartneyasicehd.com. Sincerely, Victoria L. McCartney, REHS Nuel C. Henderson, Jr., PG Senior Registered Environmental Health Specialist Engineering Geologist c: Mr. Timothy Cuellar, Advanced GeoEnviron mental, Inc., 837 Shaw Road, Stockton, California 95215