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San Joaquin County . Environmental Health Department 600 East Main Street Stockton, California 95202-3029 Website: wwfN sjgovorg/ehd Phone: (209) 4683420 Fax: (209) 464-0138 May 13, 2009 Mr. Joseph & Ms. Rosanna Panetta PO Box 1072 jSan Ramon CA 94583 `Subject: Panetta Property (former UST) 95 W. 11"' Street Tracy, CA 95376 DIRECTOR Donna Heran, RENS ASSISTANT DIRECTOR Laurie Cotulla. REHS PROGRAM COORDINATORS Mike Huggins, REHS, RDI Margaret Lagorio, REHS Robert McClellon, REHS Jeff Carruesco, REHS, RDI Kasey Foley REHS APN: 233-130-27 Site Code: RO#:727 SWRCB-CUF#: 17963. jThe San Joaquin County Environmental' Health Department (EHD) has received Quarterly Update ,First Quarter 2009 and Closure Consideration Request (Request) dated April 9, 2009 submitted 1 by Advanced GeoEnvironmental Inc. and has the following comments. JThe Request stated that due to the current status of the State of California Underground Storage Tank, Geanup Fund (USTCF), you can no longer afford to conduct quarterly monitoring and !request a suVension of quarterly ground water monitoring (wells MW -5 through MW -14) at the i site pending site closure. iThe EHD cannot approve a suspension of quarterly monitoring, but can approve a reduction in the frequency of sampling, laboratory analyses, and reporting the ground water data from the 1 monitoring wells associated with this site. Please be aware that the California Code of ;Regulations. Title 23, Section 2652 requires owners of contaminated underground storage tank (UST) sites to report quarterly on the status of their site to the lead regulatory agency overseeing the investigation. The report must include an update on specific information and [.results of all corrective action (investigation) which has occurred during the period. An item that ,must be discussed in each quarterly report is future investigative actions and a time schedule r. for implementing the actions. You may prepare this report yourself unless geologic or . engineering interpretation is included which would require that it be prepared by an appropriately registered professional. �3 I;The most current ground water data on Geotracker indicates that only two monitoring wells I ontain dissolved petroleum constituents. Based on the site characterization and data collected ,to date, the EHD feels that site closure may be warranted. Please submit a No Further Action Report (NFAR) to the EHD that conforms to Section 6.6 of the Tri -Regional Guidelines :`Appendix A (Reports). The NFAR is due at the EHD by June 30, 2009. .i Si ;The EHD requires that an additional and limited ground water sampling event be conducted and the analytical data is to be included in the NFAR. Please collect ground water samples from monitoring wells MW -6, MW -8, MW -12, MW -13, and MW -14 and analyze them for total 'petroleum hydrocarbons as gasoline (TPHg) by EPA Method 8015m or 82608 and benzene, toluene, ethylbenzene, xylene (BTEX) by EPA Method 8020 or 826013. The EHD agrees' conclusions provided by AGE that the contaminants impacting ground water from MW -11 are not likely to be related to your release and the EHD will not require further sampling of this well.