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• CpJ Vf q • <br /> San Joaquin Count Page 3 <br /> q lt 9 <br /> Environmental Health Department <br /> June 9, 2008 Project Number 99008-008073.03 <br /> IDENTIFIED RECs PROPOSED SOIL PROPOSED ANALYSES <br /> BORINGS <br /> 3 Soil Samples <br /> VOCs: USEPA Method 8260B <br /> TPH: USEPA Method 8015M <br /> North Adjoining 3 Grab-Groundwater Samples <br /> Former Landfill BV-1 through BV-3 VOCs: USEPA Method 8260B <br /> TPH: USEPA Method 8015M <br /> 3 Soil Vapor Samples <br /> VOCs: USEPA Method 8260B or TO-15 <br /> Methane by ASTM D-1946 <br /> (1)USEPA=United States Environmental Protection Agency <br /> (2)TPH=Total petroleum hydrocarbons <br /> (3)VOCs=Volatile organic compounds <br /> (4)CAM=California Assessment Manual <br /> (5)ASTM=American Society for Testing Materials <br /> The soil boring locations (Figure 1)will be determined based upon accessibility, utility clearance, and <br /> encountered drilling conditions. Bureau Veritas plans on utilizing direct push Geoprobe drilling equipment <br /> which is the most cost effective method. It is Bureau Veritas' understanding that Evergreen Devco, Inc. <br /> will arrange access to the proposed boring locations prior to commencement of drilling activities. <br /> During the drilling activities, soil cores will be collected from each borehole for soil logging purposes using <br /> a core barrel sampler containing a plastic liner that retains a relatively undisturbed soil core from which <br /> soil samples are collected. Soil cores will be field screened for volatile organic compounds (VOCs)with a <br /> photoionization detector(PID). The soil cores will also be examined for soil classification and described <br /> on detailed boring logs in general conformance with the Unified Soil Classification System (USCS). <br /> Soil Sampling <br /> Bureau Veritas proposes to collect unsaturated soil samples for possible chemical analysis from Borings <br /> BV-1 through BV-3 at approximate five-foot intervals during drilling (i.e. 5 and 10 feet bgs). Exact soil <br /> sampling depths will be determined based on field observations, drilling conditions, and the particular soil <br /> analytical laboratory method that will be performed. Retrieved sample sleeves will be cut from plastic <br /> liners, sealed with Teflon tape and plastic end caps, labeled with identifying information, and stored in a <br /> pre-chilled ice-chest awaiting transportation to the laboratory. Selected soil samples for chemical <br /> analysis (discussed in Task 3)will be recorded onto a chain-of-custody document; remaining soil samples <br /> will be placed on hold by the laboratory pending additional analysis (if necessary). <br /> Groundwater Sampling <br /> Groundwater is expected to be encountered at approximately 10 feet bgs and expected to potentially flow <br /> southerly due to the nearby slough, to easterly based on the regional gradient. If encountered, Bureau <br /> Veritas will attempt to collect grab-groundwater samples from Borings BV-1 through BV-3 using one of <br /> the following methods: <br /> • Bureau Veritas will attempt to collect grab-groundwater samples from the borings using a closed- <br /> system Hydropunch®sampler. The Hydropunch®sampling tool will be advanced beyond the <br /> drill bit into undisturbed soil, and the sampling tool will be retracted thereby exposing the screen <br /> and allowing water to flow into the sampling chamber. <br /> SAESTROJECTW-Chicago[99t(15-16)@008\08073 StocktonThase WD0447 Wkplan SJCo.doe <br />