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KLEINFELDER locations within the footprint area. The eighty eight (88) discrete soil samples collected within the footprint area will be composited by the laboratory into 22 four-point composite samples prior to analyses (to be used for profile purposes). Additional sampling and analyses may be warranted if the volume of impacted soil exceeds the estimated 20,000 cubic yards. The remaining 16 (of the total 104 discrete soil samples) will be collected for laboratory analyses to qualitatively assess vertical limits of petroleum impacted soil in the footprint area and to assess soil in perimeter (lateral) positions to the spill area. Twelve of the sixteen discrete soil samples will be collected from each of the perimeter deep pushprobe borings (Four each for borings G2, G3 and G4). Four of the sixteen discrete soil samples will be collected from the bottom samples from each of four pushprobe borings located in each quadrant of the spill area (below the estimated contaminated area). One soil sample from sample locations P3, P10, P13, and P17 will comprise these four bottom samples and will be analyzed for confirmation of field observations of"clean" soil within the footprint area. The intent of the assessment will include advancing each of the 29 probe locations into observed "clean soil' based on either field observations and PID Readings and/or chemical analyses. Proposed sampling depths are based on the estimated extent of petroleum impacted soil. Please note additional confirmation soil samples will be needed during the excavation and disposal phase of the project. Soil samples will be collected continuously at each probe location using a pneumatically driven steel probe at approximately 4 to 5 foot intervals. Soil samples will be obtained by inserting a sample barrel, lined with acetate liners, into the probe. The sample barrel will be lowered to the desired sampling depth and driven into the soil. The desired sample interval will be cut from the sample collection liners and the sample tubes will be removed and sealed with Teflon film and plastic fitting end caps and immediately placed in an iced cooler. The soil samples will also be collected for lithologic classification and qualitative field screening (PID). Lithologic classification will be based on the Unified Soil Classification System (USCS). 02001 PROP.ENV/ST04P 118/DH:ss Page 2 of 2 Copyright 2004,Kleinfelder,Inc. March 22,2004