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San Joaquin County <br /> N. DIRECTOR <br /> Environmental Health Department <br /> Linda Turkatte,REHS <br /> 1868 East Hazelton Avenue <br /> SCODtockton, California 95205-6232 PROGRAM <br /> Robert MoCieORllon,REHINATORSS <br /> Jeff Carruesco,REHS,RDI <br /> Website: www.sjgov.org1ehd Kasey Foley,REHS <br /> Rodney Estrada, REHS <br /> Phone: (209)468-3420 Adrienne Ellsaesser,REHS <br /> Fax: (209)464-0138 <br /> June 1, 2015 <br /> Michael D. & Sharon Olivarez <br /> 540 Scotts Ave. <br /> Stockton, CA 95203 <br /> Subject: Skips Service Station (former) LOP Case#: 1038 <br /> 300 S. California St. CUF#: 8492 <br /> Stockton, CA 95203 APN: 14909501 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed First Quarter <br /> 2015 Monitoring Report (OMR) dated May 15, 2015, prepared by Foothill Engineering. QMR <br /> contains findings of the monitoring well groundwater sampling event performed on March 5, <br /> 2015 related to the subject site. <br /> In QMR, Foothill Engineering recommended continued use of the pump and treat remediation <br /> system and preparation of a work plan to assess soil vapor intrusion to address an impediment <br /> to case closure in accordance with the Low-Threat Underground Storage Tank Case Closure <br /> Policy. The EHD concurs with these recommendations, <br /> The EHD directs that total depth is measured for each monitoring well at least once per year to <br /> check for silting of the well casing or obstructions in the well. Proper decontamination <br /> procedures should address any concern of cross-contamination between wells during collection <br /> of measurements. In addition, the EHD is of the opinion that there is sufficient information <br /> available for Foothill Engineering to provide reasonable screen interval measurements in <br /> reports. Please re-evaluate well construction details and revise in future reports as necessary. <br /> Please contact Gabriel Gonzalez at (209) 468-3442 or gagonzalez@sjcehd.com if you have any <br /> questions. <br /> A4 <br /> Gabriel Gonzalez, REHS Nuel C. Henderson Jr., PG <br /> Registered Environmental Health Specialist Engineering Geologist <br /> C: Michael Vlach, PE, Foothill Engineering, 8442 Story Ridge Way, Antelope CA 95843 <br /> ec: James Barton, PG, CVRWQCB, 11020 Sun Center Drive, Suite 200, Rancho Cordova, <br /> California 95670, via Geotracker <br />