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Project No. 8753009Q O02 Woo w rd•Clyele Consultants <br /> i <br /> silt) strata are generally one or two feet, or less, in thickness; appear to <br /> t influence the presence or absence of water; and may influence the mi- <br /> gration and detection of hydrocarbons. <br /> 1 <br /> ' CONCLUSIONS <br /> Based on the sources of information cited herein and results of our <br /> { hydrologic field investigation, we conclude the following: <br /> ° Based on examination of existing wells in the terminal area and <br /> adjacent properties, these wells could not be used for this <br /> investigation to supplement water elevation data from the <br /> I WCC-installed piezometers. <br /> ° Given the indications of hydrocarbon presence observed during <br /> site visits and field investigations, there are an inadequate <br /> I number of monitoring wells in the tank terminal area to charac- <br /> terize groundwater quality beneath the site. <br /> ° A well (No. 11) located 314 mile to the southeast, if pumping at <br /> j or near capacity, may influence the direction of groundwater <br /> flow beneath the site. This well appears to be the closest <br /> i <br /> potential groundwater receptor to the tank terminal. <br /> I <br /> ° The groundwater flow direction measured in January and Febru- <br /> ary, 1987 is predominantly from the northwest to the southeast <br /> across the tank terminal area. Groundwater flow direction in the <br /> central-southeast portion of the site appears to be influenced by <br /> the presence of a groundwater mound beneath the location of an <br /> inlined pond. <br /> ° Evidence of petroleum hydrocarbons by product film was ob- <br /> served in piezometers P16 (during installation and prior to�� <br /> development) and P12 (film noted on 2-12-87). Hydrocarbon <br /> -8- <br /> r_l�m <br />