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San Joaquin County <br /> Environmental Health Department nrREcrQR <br /> . �1r .•,p Donna Heran,REHS <br /> 2•: •- ��. 600 East Main Street <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> T ; Robert McClellon,REHS <br /> .' Jeff Carruesco, REHS, RDI <br /> �'.q=.,,,•,•..��P Website: www.sjgov.org/ehd Kasey Foley,REHS <br /> Linda Turlcaite,RENS <br /> Lr�oti� Phone: (209)468-3420 <br /> Fax: (209)464-0138 <br /> February 1, 2012 <br /> City of Stockton Regent Hotel LLC <br /> Attn: Wendy Saunders 900 University Avenue <br /> 425 North EI Dorado Street, Rm. 301 Sacramento, CA 95285 <br /> Stockton, CA 95202 <br /> Stockton Arena Hotel & Conference Center, LLC Ilsis Inc. <br /> P.O. Box 1144 16900 Goldenwest Street <br /> Sacramento, CA 95812 Huntington Beach, CA 92647 <br /> Subject: Former Chase Chevrolet Site Code: 1163457 <br /> 423 North Madison Street <br /> Stockton, CA 95202 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Groundwater Monitoring <br /> Work Plan Area 15 (Work Plan), dated October 9, 2009, submitted on your behalf by Treadwell & Rollo <br /> (T&R). <br /> In the Work Plan T&R proposes the installation of four groundwater monitoring wells, located in two clusters; <br /> one cluster to investigate the location of an underground storage tank discovered and removed in 2004 and <br /> the other near the location of a former groundwater monitoring wells MW-21A and MW-21B which had the <br /> highest reported historical concentrations of total petroleum at gas (TPHg). The EHD approves the proposed <br /> wells and locations, but requires also a third cluster of two wells, in order to allow for calculation of <br /> groundwater gradient and flow direction, and to provide information on the lateral extent of the plume. Please <br /> proceed with submittal of a Work Plan Addendum that includes a proposal for a third cluster of two wells. The <br /> Addendum is due to the EHD no later than March 30, 2012. <br /> This site has been undergoing an environmental investigation since 1990. During redevelopment <br /> construction activities in 2004 a previously unknown underground storage tank(UST)was discovered. It was <br /> subsequently removed under permit and inspection by the EHD. An Unauthorized Release Report and <br /> Notification of Hazardous Waste Discharge report were filed on the newly discovered tank and new Notice of <br /> Responsibility and Site Letters were issued to the Responsible Parties. The EHD recommends the <br /> Responsible Parties file a claim to the State Water Resources Control Board Cleanup Fund on the new tank <br /> site, and that the possibility of filing a commingled plume account application for these two sites be <br /> considered. <br /> If you have any questions please contact Lori Duncan at (209) 468-0337 or by email at <br /> Iduncan(Q-sicehd.com. <br /> Sincerely, <br /> Lori Duncan, REHS Nuel C. Henderson, Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: James Barton, CVRWQCB, 11020 Sun Center Drive, Ste 200, Rancho Cordova CA 95670 <br /> David Dixon, Treadwell & Rollo, 555 Montgomery St. Ste 1300 San Francisco CA 94111 <br /> John Chase, 6441 Holman Road, Stockton, CA 95212 <br />