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San Joaquin County DIRECTOR <br /> Donna Heran,REHS <br /> plJ lf� par <br /> Environmental Health Department r ASSISTANT DIRECTOR <br /> ? -- � <br /> 600 East Main Street <br /> Laurie Cotulla,REHS <br /> Z. <br /> Q <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Carl Borgman, REHS <br /> Mike Huggins,REHS,RDI <br /> c Website: www.sjgov.org/ehd Margaret Lagorio, REHS <br /> H F6Phone: (209) 468-3420 Robert McClellon,REHS <br /> Fax: (209)464-0138 Jeff Carruesco, REHS,RDI <br /> Kasey Foley,REHS <br /> May 21,2008 <br /> Mr.Paul Zumberge <br /> Frontier Transportation,Incorporated <br /> 425 Larch Road <br /> Tracy, California 95376 <br /> Subject: Frontier Transportation,Incorporated <br /> 425 Larch Road <br /> Tracy, California 95376 <br /> By letter dated August 28, 2006, the San Joaquin County Environmental Health Department <br /> (EHD) directed you to submit the report for the aquifer pump test to the EHD by October 27, <br /> 2006. The EHD has yet to receive this report. Also, although the boring logs for monitoring <br /> wells MW-22 and MW-23 have been uploaded to GeoTracker,the State Water Resources Control <br /> Board database program, the well installation report for the two wells has not been uploaded to <br /> GeoTracker,nor has the report been submitted to the EHD. <br /> As a responsible party, you must follow all directives issued by this office, which includes <br /> submitting reports for monitoring well installations, groundwater extraction pilot tests, and <br /> quarterly groundwater monitoring reports to this agency and GeoTracker in a timely manner to <br /> remain in compliance pursuant to California Code of Regulations,Division 3, Chapter 16, Article <br /> 11, or formal enforcement action by the Central Valley Regional Water Quality Control Board <br /> may be requested. You are directed to submit all past-due reports to the EHD and <br /> GeoTracker within fourteen days of the date of this letter. <br /> Results from groundwater samples collected from monitoring well MW-24, installed in February <br /> 2007,indicate that the methyl tertiary-butyl ether(MTBE)plume is spreading and is undefined to <br /> the west of the former underground storage tanks (USTs). The EHD believes an additional <br /> monitoring well or wells are necessary to delineate the lateral extent of the MTBE plume. Submit <br /> a work plan to the EHD by August 1, 2008, for the installation of such well/wells down gradient <br /> and to the west of MW-24. <br /> BEA proposes to install "adsorbent socks, such as Carphene," in fifteen monitoring wells, to <br /> remove petroleum hydrocarbon contamination. The EHD is not convinced that Carphene will be <br /> effective in removing dissolved contaminants of concern(COC). Please submit documentation to <br /> the EHD that demonstrates that Carphene is capable of absorbing and removing significant <br /> concentrations of dissolved COC if inserted into the proposed monitoring wells. <br />