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San Joaquin County DIRECTOR <br /> Donna Heran,REHS <br /> Environmental Health Department <br /> Q,.• �.:.c ASSISTANT DIRECTOR <br /> ).•r k. <br /> 600 East.Main Street Laurie cotuua, REHS <br /> < ,Stockton "California 95202-3029 <br /> ` PROGRAM COORDINATORS <br /> Carl Borgman, RENS ' <br /> Mike Huggins,REHS,RDl <br /> �` \P Website:www.sjgov.org/ehd Margaretl_agorio,REHS. <br /> FORt� <br /> Prone: {209}468-3420 Robert McClellon, REHS <br /> Fax: {209}464-0138 .teff Carruesco, REHS, RDI <br /> Kasey Foley, REHS <br /> JAMES TAYLOR <br /> CONTI GROUP COMPANIES INC <br /> AON CENTER <br /> 200 E RANDOLPH STE 1900 <br /> CHICAGO IL 60601 <br /> RE: 1805 Harbor Street Site Code: 1132 <br /> Stockton, CA <br /> WORK PLAN: Additional Site Assessment <br /> DATED: November 19,2007 <br /> 5 <br /> PREPARED BY: AGE for Huff and Huff Inc. <br /> APPROVED: {U <br /> DISAPPROVED- . [ ] <br /> ADDENDUM NEEDED: [ ] Submit bw <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [HSS 25296.10(c)(3)]: <br /> 1. To.drill 3 soil borings and collect soil samples every 5 feet. <br /> 2. To install 2 shallow MWs(total depth approximately 28 feet)and one deeper MW(total depth <br /> approximately 35 feet)'in'the three borings. These wells will be located to the east of the <br /> .former UST excavation and within 75 feet of exiting MW3. <br /> 3. The 3 MWs will be developed and.purged prior to groundwater collection. Groundwater <br /> l samples will be analyzed for:THP=g and TPH-d.The MWs will be sampled quarterly and the <br /> results will'be'submitted to:EHD and CVRWQCB for review. <br /> 4. The 4 additional borings will be positioned around the former UST excavation area and 4 soil <br /> vapor samples will be collected for analysis.The borings will be drilled to 5 feet below <br /> ground surface. Vapor will be analyzed-for.THP-9 and TPH-d. Soil vapor samples results will <br /> be compared to Environmental Screening Levels(ESL). <br /> COMMENTS AND CONDITIONS: <br /> 1. Please refer to EDH letter dated Oct. 10,2007 for assessment and corrective action requirements <br /> and recommendations..MWT has documented groundwater contamination. The vertical extent of." <br /> groundwater contamination near MW7 is not addressed in this Work Plan. <br /> 2. Please submit a permit application and fees within 6 weeks. After the EHD permit is issued,work <br /> must be completed within 30 days. <br /> 3. Within 60 days of the drilling and well installations,a report of finding with conclusions and <br /> recommendations must be submitted to EHD and CVRWQCB. <br /> i <br /> f43 <br /> 1 <br /> DATED. !I BY <br /> Harlin Knoll,Senior REHS(2091468-3442 <br /> i <br /> 1 <br />