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Mr Daniel K Barber <br /> D K Barber & Associates <br /> June 21, 2402 <br /> Page 3 of 5 <br /> subsequent bores were installed by hollow stem auger and subsequently completed as <br /> ' monitoring wells (The final well MW-7 was drilled by Mr Barber on June 7, 2002 after <br /> Fred Hayden of SES left the site on June 7, 2002) All the wells were drilled to depths of <br /> approximately 60 feet below grade Groundwater was generally encountered at between <br /> 50 and 55 feet below ground surface (bgs) Screens were placed between 40 and 60 feet <br /> bgs Groundwater was not observed to rise after being first encountered, suggesting <br /> unconfined conditions <br /> Field Screening for Contamination and Soil Sampling <br /> ' Potential organic contamination was evaluated in the soil cores by screening soil samples <br /> 1 every five feet with a photoionization detector (PID) provided by D K Barber & <br /> Associates Approximately 100 grams of soil sample was placed in a ZiplockTM bag, <br /> sealed, and allowed to equilibrate for at least two minutes before screening As <br /> ' summarized on Table 1 and in the borehole logs, PID readings were most pronounced in <br /> bores MW-2 and MW-4, were non detected for all samples in bore MW-3 and were <br /> mostly non-detectable with trace levels in bores D-1, MW-5 and MW-6 The highest <br /> readings were associated with 25 to 35 foot interval in bore MW-4 where concentrations <br /> of 13 to 102 ppmv were reported No obvious staining or odors indicative of <br /> ' contamination were noted during the field work except where indicated in the borehole <br /> logs <br /> ' Soil sampling was limited to the vadose zone area between 5 feet and the capillary frnge <br /> at about 55 feet bgs Of the X soil samples collected 16 were submitted for analyses <br /> based on their being a PID response and/or previous site investigation data The <br /> 155samples [samples D1-20, MW-4-25, MW-4-30, MW-4-35, MW-4-40, MW-4-55, <br /> MW-3-20, MW-30-15, MW-3-45, MW-2-10, MW-2-15, MW-2-20, MW-2-30, MW-40, <br /> MW-2-45 and MW-2-55 were submitted for laboratory analyses to Sequoia laboratories <br /> by D K Barber and Associates to be analyzed for TPH components <br /> ' GROUNDWATER WELL COMPLETION <br /> A total of five groundwater wells were completd as part of the June 2002 field <br /> charaterization program The wells were completed in accordance with the approved <br /> workplan and the protocols and procedures approved by apllicable well installtion <br /> regulations and guidance <br /> 1'40 <br /> Stellar Environmental Solutions <br /> 1 <br />