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San Joaquin County
<br /> AQu,N Environmental Health Department DIRECTOR
<br /> o c Donna Heran, REHS
<br /> 2r' y 600 East Main Street
<br /> �. PROGRAM COORDINATORS
<br /> U): < Stockton, California 95202-3029 Robert McClellon, REHS
<br /> 5 Jeff Carruesco,REHS, RDI
<br /> Kasey Foley, REHS
<br /> c ..�- .... �P Website: www.sjgov.org/ehd
<br /> tlpo�te� Phone: (209) 468-3420
<br /> Fax: (209) 464-0138
<br /> February 17, 2010
<br /> Ms. Jennifer Sedlachek Mr. Kevin Meeks
<br /> ExxonMobil Environmental Services Company Mr. Pat and Ms. Kathleen Meeks
<br /> 4096 Piedmont Avenue #194 25355 Highway 99
<br /> Oakland, California 94611 Acampo, California 95220
<br /> Subject: Former Mobil Service Station 99ACA (former Meeks RV)
<br /> 25355 North Highway 99
<br /> Acampo, California 95220
<br /> Dear Ms. Sedlachek:
<br /> The San Joaquin County Environmental Health Department is extending the date from
<br /> February 15, 2010, to May 4, 2010, to complete fieldwork that includes the installation of two
<br /> off-site monitoring wells and the collection of soil gas samples from five soil vapor sampling
<br /> wells (SV1 through SV5) at the above-referenced site. In Work Status, Schedule Modification,
<br /> and Extension Request, dated February 8, 2010, Environmental Resolutions, Inc. (ERI) has
<br /> requested an extension to complete the fieldwork and has tentatively rescheduled the
<br /> collection of soil vapor samples for February 18 and 19, 2010, and the installation of
<br /> monitoring wells MW9 and MW10 for the first week of March 2010. The EHD understands
<br /> that because of weather and soil conditions these proposed dates may not be practical, and
<br /> so the EHD is allowing more time to complete the fieldwork.
<br /> During the review of site analytical data, the EHD noticed that the laboratory is not reporting
<br /> the laboratory control sample (LCS), LCS duplicate (LCSD), matrix spike (MS) and MS
<br /> duplicate (MSD) for 1,2-dichloroethane (1,2-DCA) as part of their quality control. Since
<br /> 1,2-DCA is a chemical of concern at this site, please have the laboratory report the LCS/LCSD
<br /> and MS/MSD for 1,2-DCA in future laboratory reports.
<br /> If you have any questions, please contact Vicki McCartney by telephone at (209) 468-9852 or
<br /> by email at vmccartney@sjcehd.com.
<br /> Sincerely,
<br /> G;�
<br /> Victoria L. McCartney, REHS6d_� Nuel C. Henderson, Jr., PG
<br /> Senior Registered Environmental Health Specialist Engineering Geologist
<br /> c: Mr. James L.L.. Barton, PG, California Regional Water Quality Control Board Central Valley
<br /> Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670
<br /> Ms. Tracy Loutsch, Environmental Resolutions, Inc. 601 North McDowell Boulevard,
<br /> Petaluma, California 94954-2312
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