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Work Plan for Site Assessment U <br /> Former Texaco Service Station <br /> Chevron Site ID 309075 <br /> �. September 30, 2009 <br /> `r 1.0 INTRODUCTION <br /> V <br /> Service Station No: Former Texaco Service Station <br /> Chevron Site ID 309075 <br /> `" Site Address: 3978 South Highway 99 <br /> Stockton, California <br /> Contact: Ms. Stephanie McKenna <br /> Chevron Environmental Management Company(Chevron) <br /> 6111 Bollinger Canyon Road, Room No. 3652 <br /> San Ramon, California 94583 <br /> Consulting Company: Ms. Sherrie Lang <br /> ARCADIS <br /> 950 Glenn Drive, Suite 125 <br /> ,.., Folsom, California 95630 <br /> Project No.: B0046434.0000 <br /> Primary Agency/Contact: San Joaquin County Environmental Health Department <br /> Ms. Lori Duncan <br /> On behalf of Chevron Environmental Management Company (Chevron), ARCADIS has <br /> prepared this work plan for additional site assessment associated with former Texaco service <br /> station (Chevron Site ID 309075) located at 3978 South Highway 99 in Stockton, California <br /> (Figure 1). As requested by the San Joaquin County Environmental Health Department <br /> (SJCEHD) letter dated August 12, 2009, the proposed activities consist of the installation of two <br /> groundwater monitoring wells to evaluate the own gradient extent of petroleum ydrocar on <br /> impacts to soil and groundwater onsite. <br /> b" <br /> 2.0 BACKGROUND INFORMATION <br /> 1,r <br /> 2.1 SITE HISTORY <br /> b <br /> A summary of the site history and previous investigations is included in Attachment A. Historical <br /> groundwater monitoring and analytical data tables are included in Attachment B. Historical <br /> analytical soil data is included in Table 1. Soil boring and well construction details are included <br /> in Table 2. <br /> 2.2 SITE GEOLOGY <br /> Boring and well logs from previous investigations are included in Attachment C. Boring logs for <br /> y-' MW-1, P1, P2, P3, and P4 are unavailable in historical record. A groundwater flow direction <br /> rose diagram is included in Attachment D. <br /> \\arcadis-us\officedata\Sacramento-CA\ENV\CHEVROM309075\6 Deliverables\Work Plan\Downgradient Wells\Work Plan for Downgradient Wells_379910950.doc <br /> L <br />