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16200 McKinley Av.,Lathrop, CA <br /> AEI Project#9479 <br /> August 3,2003 <br /> Page 3 <br /> C57 licensed drilling contractor. A drilling permit will be obtained from SJCEHD. The borings <br /> will be advanced to a maximum depth of approximately 20 feet bgs as needed to collect <br /> groundwater samples. <br /> Soil will be continuously cored in each boring. Cores will be retained in 1.5" diameter acrylic <br /> liners. Soil samples will be cut from the liners at approximately 4-foot intervals and retained for <br /> possible chemical analyses. Field screening will be done at regular 4-foot intervals and as . <br /> determined by the onsite geologist. Based on field observations and organic vapor <br /> measurements collected in the field, additional samples may be retained at the discretion of the <br /> onsite geologist. <br /> Groundwater samples will be collected from each boring inserted through the direct push rods or <br /> through temporary slotted PVC casing placed in the boring. Water samples will collected using <br /> a bailer or a drop tube equipped with a check valve on the bottom. Following collection of <br /> samples, all drilling equipment and temporary casing material will be removed from the <br /> boreholes and each boring will be backfilled with neat cement grout. <br /> It is anticipated that one soil sample and one groundwater sample will be analyzed from each <br /> boring. In addition, vapor samples will be collected and analyzed from selected borings. All <br /> selected samples will be analyzed for TPH-g (EPA method 8015M), benzene, toluene, ethyl- <br /> benzene,and xylenes (BTEX) and MTBE (EPA method 8021M). Soil and groundwater samples <br /> will also be analyzed for TPH-d (EPA method 8015M). <br /> Waste Storage <br /> Drill cuttings will be stored in a 5-gallon bucket, pending the results of sample analyses. On-site <br /> treatment or off-site disposal of cuttings is not included in this scope of work. Equipment rinse <br /> water will be used for grout mixing or stored in an appropriate container. Following <br /> characterization, all waste materials will be disposed of in an appropriate manner. <br /> REPORTING <br /> The report will be detail the methods and findings drilling of the temporary borings. Following <br /> receipt of all analytical and well survey data, a technical report will be prepared. The final report <br /> will include figures, data tables, and logs of borings. Recommendations may be made for further <br /> assessment if deemed necessary. <br /> SITE SAFETY <br /> Prior to commencement of field activities, a site safety meeting will be held at a designated <br /> command post near the working area. Emergency procedures will be outlined at this meeting, <br /> including an explanation of the hazards of the known or suspected chemicals of interest. All site <br />