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San Joaquin County DIRECTOR <br /> ,Opo.! co Donna Heran, REHS <br /> Environmental Health Department ASSISTANT DIRECTOR <br /> c. 600 East Main Street Laurie Cotulla. REHS <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Carl Borgman, REHS <br /> Mike Huggins, REHS, RDI <br /> Cq�i'960 i`P Website: www.sjgov.Org/ehd Margaret Lagorio, REHS <br /> Phone: (209) 468-3420 Robert McClellon, REHS <br /> Fax: (209) 464-0138 .teff Carruesco, REHS, RDI <br /> March 11, 2009 Kasey Foley, REHS <br /> Ava Langston-Kenney <br /> City of Stockton Redevelopment Agency <br /> 425 North EI Dorado Street, Room 317 <br /> Stockton, CA 95202-2317 <br /> Subject: 216 North California Street Site Code: 1687 <br /> Stockton, CA 95202 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Underground Storage <br /> Tank Delineation Sampling Using Cone Penetration Testing with Ultra-Violet Optical Screening Tool <br /> (Report) dated January 5, 2009, submitted on your behalf by Condor Earth Technologies, Inc. (Condor) <br /> and has the following comments. <br /> The Report documents work conducted with three cone penetrometor test (CPT) borings utilizing an ultra- <br /> violet optical screening tool (UVOST) to continue the investigation of the vertical and lateral extent of the <br /> petroleum hydrocarbon contamination at your site. Soil and grab groundwater samples were collected <br /> from the borings and submitted for laboratory analysis. Reported results from the analyses indicate highly <br /> impacted groundwater and soil to depths of approximately 60 feet below surface grade (bsg). <br /> The Report recommends additional site investigation using CPT technology, and using the monitoring <br /> wells of neighboring contaminated UST sites for evaluation of your groundwater contamination. The EHD <br /> does not agree with these recommendations. While you may use applicable data from nearby sites to aid <br /> in the characterization of your site, based on the findings presented in the report you need to install <br /> groundwater monitoring wells on your site. <br /> Please proceed with preparation and submittal of a work plan to continue the investigation of the lateral <br /> and vertical extent of the documented petroleum hydrocarbon contamination at your site, including the <br /> installation of groundwater monitoring wells. The work plan is due to the EHD no later than May 15, 2009. <br /> Per California Code of Regulations, Title 23, Division 3, Chapter 30, Section 3890, all contaminated <br /> underground storage tank (UST) sites must submit electronically all laboratory analytical data, reports of <br /> findings, site maps, depth to water measurements, and monitoring well longitude, latitude and elevation <br /> survey data to Geotracker, the State Water Resource Control Board website. No documents from your <br /> site have been submitted to Geotracker. Please become compliant with this regulation. <br /> If you have any questions please call Lori Duncan at (209)468-0337. <br /> Sincerely, <br /> Lori Duncan, REHS Nuel C. Henderson, Jr., PG <br /> Registered Environmental Health Specialist Engineering Geologist <br /> c: James Barton, CVRWQCB, 11020 Sun Center Drive, #200, Rancho Cordova CA 95670 <br /> Bill Cook, Condor, 188 Frank West Circle, Suite 1, Stockton CA 95206 <br />