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<br /> San Joaquin County
<br /> ° I Environmental Health Department
<br /> DIRECTOR
<br /> .o
<br /> Linda Turkatte,REHS
<br /> 1868 East Hazelton Avenue
<br /> Stockton, California 95205-6232 PROGRAM COORDINATORS
<br /> Robert McClellon,REHS
<br /> Jeff Carruesm.REHS,RDI
<br /> FFo.RiWebsite: www.s%govorg/ehd Kasey Foley,REHS
<br /> Phone: (209) 468-3420 Rodney Estrada,REHS
<br /> Fax: (209) 464-0138 Adrienne Ellsaesser,REHS
<br /> May 8, 2015
<br /> Sal Hernandez
<br /> Facilities Management Division
<br /> County of San Joaquin
<br /> 4520 West Eight Mile Road
<br /> Stockton, CA 95209
<br /> Subject: Groundwater Monitoring Schedule
<br /> 1810 E. Hazelton Avenue
<br /> Stockton, CA 95202
<br /> On May 4, 2015, the San Joaquin County Environmental Health Department (EHD) spoke with a
<br /> representative of your consulting firm, Condor Earth Technologies, Inc. (Condor), regarding the
<br /> groundwater sampling schedule and sample analysis at the subject site.
<br /> By EHD letter dated November 22, 2013, the EHD directed additional monitoring well sampling and
<br /> analyses to address a lack data pertaining to a former waste oil underground storage tank. As of this
<br /> letter's date, only a portion of the requested analyses have been submitted to the EHD. To complete the
<br /> requested analyses, please incorporate the following in your next groundwater sampling event:
<br /> • MWA: semi-volatile organic compounds (SVOCs) by Environmental Protection Agency (EPA)
<br /> method 8270; and
<br /> • SVE-2: total petroleum hydrocarbons quantified as motor oil (TPH-mo), SVOCS by EPA method
<br /> 8270, naphthalene, diesel (TPH-D) and 1,2-dichloroethane(1,2-DCA).
<br /> At this time, the above analyses need only be performed once and the EHD does not require further
<br /> analysis for naphthalene or kerosene in groundwater. The groundwater monitoring schedule is to be as
<br /> follows: semi-annually sample MW-1, MW-2, and MW-4; annually sample MW-6; and biennially sample
<br /> MW-3, MW-5, and MW-7. Analyses should include: TPH-gasoline, methyl tertiary-butyl ether (MTBE), and
<br /> benzene, toluene, ethylbenzene, xylenes (BTEX).
<br /> According to Condor, the next groundwater sampling event will include all monitoring wells at the subject
<br /> site. Please notify the EHD at least five working days prior to conducting the event.
<br /> If you have any questions concerning this letter, please contact Gabriel Gonzalez at (209) 468-3442, or by
<br /> email at gagonzalez@sjcehd.com.
<br /> AA
<br /> Gabriel Gonzalez, REHS Nuel C. Henderson, Jr., PG
<br /> Registered Environmental Health Specialist Engineering Geologist
<br /> c: Bill Cook , Condor Earth Technologies, Inc. 188 Frank West Circle Suite I Stockton, CA 95206.
<br /> ec: James L.L. Barton, PG, CVRWQCB, 11020 Sun Center Drive, Suite 200, Rancho Cordova, CA
<br /> 95670, via Geotracker
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