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.00T-27-2009 17:38 ARCADIS BRIGHTON MI 810 229 8837 P.05i06 <br /> WORK PLAN SUMMARY FOR THE SAN JOAQUIN COUNTY EHD SITE MITIGATION UNIT <br /> TRACY PONTIAC,2628 ROSERTOSON,TRACY,CA 95377 <br /> PREPARED BY ENCORE ENVIRONEMNTAL CONSORTIUM, LLC <br /> E E C, GO f&lk _f 11, 6'� <br /> Below is the outline of a limited soil investigation planned for Thursday, November 5, 2009: <br /> 1. Prepare a Health and Safety Plan for Site activities. <br /> 2. Mobilize to the Site and perform direct push technology(DPT) soil borings in the immediate vicinity <br /> of each of the locations specified below. The mobilization will include an underground public utility <br /> stake out. The utility stake out will include a call-in to the local jurisdictional public utilities <br /> clearance organization to identify and locate public utilities present on and around the Site. A public <br /> utilities stake out will not include location of private utilities on the Site property. Therefore, a <br /> private utility locate will occur at the Site. <br /> 3. install a total of two(2)test borings at 1 to 10 feet below ground level (bgl) in the vicinity of the <br /> oil/water separator. In addition,two contingency borings are planned to allow for potential findings <br /> resulting in unknown RECs that could be identified during the Phase I ESA, bringing the total number <br /> of borings to four(4). A concrete core drill may be necessary at the two contingent locations. Soils <br /> will be collected from each test boring and screened in the field with a photoionization detector <br /> (PID) or TVA Model 1000 Organic Vapor Analyzer(OVA)equipped with a flame ionization detector <br /> (FID). Based on field screening results,one representative soil sample will be collected from each <br /> borehole and submitted for confirmation laboratory analysis. Excess soil cuttings will be returned to <br /> the borehole and the surface will be sealed with a bentonite plug and replacement of the asphalt <br /> surface_ Re C - ( w1�►--. Ce-v ,nx — <br /> 4. If present, collect up to four(4)groundwater samples from the advanced borehole locations, which <br /> include one from each of the boring locations. Samples will be collected through a temporary PVC <br /> well screen and riser, and samples will be obtained using a peristaltic pump and polyethylene <br /> tubing. No permanent wells will be installed at the boring locations. Groundwater is not expected <br /> to be encountered. <br /> S. Soil samples collected will be submitted to an accredited laboratory for analysis according to the <br /> following: <br /> Method No. of Samples <br /> TPH EPA Method 8015 Modified (DRO &GRO) 4 soil <br /> PAH EPA Method 8310 4 soil <br /> VOC EPA Method 8260 4 soil <br />