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San Joaquin County DIRECTOR
<br /> Environmental Health Department DonnaHeran,REHS
<br /> A
<br /> �o P c0 SSISTANT DIRECTOR
<br /> 600 East Main Street Laurie Cotulla,REHS
<br /> Stockton, California 95202-3029
<br /> PROGRAM COORDINATORS
<br /> • '_ Mike Huggins,RENS,RDI
<br /> Margaret Lagorio,REHS
<br /> Website: www.Sjgov.org/ehd Robert McCieilon,REHS
<br /> LlFOR
<br /> Phone: (209)468-3420 ,teff Carruesco,RENS,RDI
<br /> Fax: (209) 464-0138 Kasey Foley,REHS
<br /> June 22, 2009
<br /> Mr.Wesley Parkinson
<br /> Parkinson's I-5 ARCO Service Station
<br /> 3250 West.Hammer Lane
<br /> Stockton, California.95209
<br /> Subject: Parkinson's I-5 ARCO Service Station
<br /> 3250 West Hammer Lane
<br /> Stockton,California 95209
<br /> By letter dated February 27, 2009, the San Joaquin County Environmental Health Department
<br /> (EHD) recommended that you.request access to collect groundwater samples for metal analysis
<br /> from monitoring wells screened in the same depth interval as the ozone injection wells and down
<br /> gradient of the injection well(s) at the adjacent ConocoPhiilips 76 (former BP) .Service Station
<br /> No. 11 193at 3202 West Hammer Lane, Stockton. If analytical,results indicated that groundwater
<br /> quality would not be adversely affected, and if it could be .demonstrated that your site and the
<br /> ConocoPhiilips site have similar hydrogeological characteristics, then an ozone bench-scale study
<br /> may not be necessary. The EHD requested a response by March 31, 2009; however, to date, the
<br /> EHD has not received comments concerning these recommendations, The EHD believes this
<br /> evaluation may save considerable time and expense and requests a response by July 27,2009.
<br /> To comply with the State Water Resources Control Board Resolution No. 2009-0042, the EHD
<br /> . approves the semi-annual monitoring and sampling of monitoring.,wells MW-1, MW-2, and
<br /> MW-5. Biennially sample MW-3, MW-4, and MW-6. Analyze groundwater samples collected
<br /> from MW-1 for total petroleum hydrocarbons quantified as gasoline (TPHg); benzene, toluene,
<br /> ethyl benzene, and total xylenes (BTEX); methyl tertiary-butyl ether (MTBE), and tertiary-butyl
<br /> alcohol (TBA). Analyze groundwater samples collected from the remaining wells for TPHg,
<br /> MTBE,and TBA.
<br /> If you have any questions, please contact Vicki McCartney by telephone at(209).468-9852 or by
<br /> e-mail at tirnccarti.i.ev(a sjcel..i.d.com.
<br /> Sincerely,
<br /> 73
<br /> Victoria L.McCartney,REHS 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. Sarah O. Salcedo,PG,Stratus Environmental,Inc., 3330 Cameron Park Drive, Suite 550,
<br /> Cameron Park,California 05682
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