Laserfiche WebLink
Geomatrix <br /> the soil beneath the stockpiles and to evaluate the necessity for additional assessment of <br /> groundwater in these areas. The actual depth of each boring will be based on field conditions <br /> encountered during drilling. <br /> Continuous sampling will be attempted from ground surface to the total depth of each boring. <br /> Recovered soil will be field screened for organic vapors using a photoionization detector(PID) <br /> and soil types will be described and recorded by a Geomatrix geologist or engineer using the <br /> Unified Soil Classification Scheme (USCS). Soil samples designated for chemical analysis <br /> will be collected in an acetate liner. The ends of the acetate liner will be covered with <br /> TeflonTM, which will be secured in place with plastic end caps and sealed with TeflonTM tape. <br /> Samples, once packaged and labeled, will be placed in an ice-filled chest for delivery to the <br /> laboratory. <br /> After completion of soil sampling, each boring will be destroyed by backfilling with a <br /> bentonite-cement grout. After the grout in each boring has been allowed to settle and has been <br /> topped off, the boring will be capped with asphalt cold patch to match surrounding surface <br /> conditions. <br /> 5.3 LABORATORY ANALYSIS <br /> Soil samples will be shipped to GeoAnalytical Laboratory located in Modesto, California(a <br /> State of California Department of Health Services Environmental Accreditation Program <br /> [ELAP] certified laboratory),following chain-of-custody protocol. Soil samples collected from <br /> depths of 1, 2.5, 5, and 10 feet bgs will be analyzed by the laboratory for the following: <br /> • TPHd using EPA Method 8015 M; <br /> • Total Cr using EPA Method 6010; and <br /> • Cr VI using EPA Method 7199. <br /> In addition to the total concentrations, each soil sample will be analyzed further for the <br /> extractable concentrations of the above listed constituents using Title 22 DIWET method. <br /> 5.4 EQUIPMENT DECONTAMINATION AND WASTE CONTAINMENT <br /> Sampling equipment(hand augers, direct push rods, drive sampler, or other downhole <br /> equipment) will be re-used between sample locations. To reduce the potential for cross- <br /> contamination, re-usable sampling equipment will be decontaminated using the following <br /> procedure: <br /> PAl0626.000.O\Docs\MLT Soil Work Plan.doc 8 <br />