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101ECENED <br /> Delta APR 2 7 2004 <br /> R&I <br /> Environmental ENVIRONMENT HEALTH <br /> consultants,inc. PERMIT/SERVICES <br /> Solving environment-related business problems worldwide www.deltaenv.com <br /> 3164 Gold Camp Drive•Suite 200 <br /> Rancho Cordova, California 95670 USA <br /> 916.638.2085 800.477.7411 <br /> Fax 916.638.8385 <br /> April 23,2004 <br /> Jeffrey M. Baker <br /> Supervisor,Environmental Compliance&Remediation <br /> Tesoro Petroleum Companies,Inc. <br /> 3450 South 344th Way, Suite 100 <br /> Auburn,Washington 98001-5931 <br /> Subject: Baseline Assessment Results <br /> Former Tesoro Site No.67078 <br /> 35 North Cherokee Lane,Lodi,CA <br /> Delta Project No.D003-006 <br /> Dear Mr.Baker: <br /> Delta Environmental Consultants, Inc. (Delta) has been authorized by Tesoro Petroleum Companies, Inc., <br /> (Tesoro)to conduct a Baseline Assessment of the subject site. Tesoro has recently sold the station to USA <br /> Petroleum(USA). The purpose of the assessment is to document soil and groundwater quality beneath the <br /> site at the time of ownership transfer. Delta conducted subsurface drilling at the site in conformance with <br /> procedures provided by Tesoro and USA. Tesoro and USA approved the work prior to implementation of <br /> drilling activities. This report presents the results of field work and laboratory chemical analyses conducted <br /> in December 2003. <br /> Site Description <br /> The site is located at 35 North Cherokee Lane, Lodi, California(Figure 1). The site is currently a USA <br /> Petroleum service station, located on the southwest corner of North Cherokee Lane and Elm Street. <br /> Depth to groundwater in this area ranges from approximately 50 to 70 feet below surface grade(bsg). <br /> Description of Work <br /> Delta supervised V&W Drilling while they advanced six soil borings to approximately 30 feet below <br /> surface grade (bsg). The locations of the soil borings are shown on Figure 2. The soil borings were <br /> advanced utilizing a direct-push drill rig. Soil samples were collected at five-foot intervals and logged to the <br /> total depth drilled. Soil types encountered were classified using the Unified Soil Classification System, <br /> Visual/Manual Method, and recorded on a soil-boring log. Soil samples collected for lithologic description <br /> were also field measured for volatile organic compounds using a photo-ionization detector (PID) and <br /> recorded on the boring log. Field methods and procedures used by Delta during installation of the soil <br /> borings are summarized in Enclosure A. Soil boring logs are presented in Enclosure B. <br /> A member of. <br /> Xinogeif <br /> Environmental Alliance <br />