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Vorazio, Barnhorst` U Donar Wo•warti•Chrde Consuitants <br /> Project No. 8753009Q-AN02 <br /> Page 3 <br /> The array of thirty-two piezometers were checked in May 1987 <br /> and will be checked again in August 1987 to obtain seasonal ' <br /> groundwater elevation measurements. Monthly groundwater <br /> elevation measurements do not appear to be warranted at this <br /> time. The groundwater elevation data will be used to construct <br /> potentiometric contour maps. Each piezometer location will also <br /> be evaluated for the presence of free product. The installation <br /> of monitoring wells to the-east and south of the terminal area is <br /> not recommended at this time, but may be appropriate following <br /> the results of the Phase II investigation; <br /> ° The piezometers, exploratory trenches, and other reference <br /> locations in and around the petroleum terminal area will be <br /> surveyed to establish elevation and location with respect to a <br /> benchmark of known elevation. The surface elevations and <br /> locations will be used to construct a site plan. <br /> Task 4. Laboratory and Data Analyses <br /> Based on the field assessment (OVM readings and visual cues), laboratory <br /> analyses (EPA Method 8015) will be performed on up to 30 soil samples to <br /> analyze for the presence of total extractable hydrocarbon constituents. <br /> Laboratory analyses (EPA Methods 8015, 602 and 604) may be performed on <br /> up to three water samples obtained from the storm drain outfalls to detect <br /> the presence of TEH, benzene, toluene, xylenes, ethylbenzene, and <br /> phenols. <br /> Based on the information and data obtained during the information review, <br /> field investigation, and laboratory analyses, we will evaluate the presence <br /> of petroleum hydrocarbons in subsurface soils. <br /> Task. 5. Summary Report <br /> WCC will provide a report to document our conclusions and <br /> recommendations based on our Phase II Subsurface Investigation. <br /> We look forward to working with you on this project. If you have any <br /> questions, please give us a call. <br /> Very truly yours, <br /> WOODWARD-CLYDE CONSULTANTS <br /> Michael K. Snyde <br /> Project Manager <br /> MKS/pl <br />