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t ' KEI-P86-084A-1 April 10 , 1987 Page 2 i FIELD MEASUREMENTS AND OBSERVATIONS The apparent groundwater flow direction was determined by measuring the relative surface elevation of the groundwater table beneath the site , and depth to groundwater for the wells . The apparent direction of groundwater flow at the site is toward the north-northeast . While drilling on January 27 , 1987 , groundwater was , encountered at depths ranging from 4. 5 to 6 feet below the ground surface. In subsequent measurements on February 3 and 7 , 1987 , groundwater in wells MW-5 and 1,111-6 had risen to depths ranging from 4. 25 to 4 . 5 feet . Groundwater in wells M14-7 and MW-8 fell to depths ranging from 5 . 5 to 6 . 8 feet below the ground surface . The materials encountered during drilling con$isted predominately of clay to clayey silt. GROUNDWATER SAMPLING The four wells (MW-5 to MW-8) were developed on February 3 , 1987 and sampling was conducted on February 9 , 1987 . Each of the eight monitoring wells at the site was inspected for the presence of free-floating product using a clear acrylic bailer . The shallow groundwater table elevation was also measured . During sampling , no free product or gasoline sheen was noted in any of the wells. Prior to sampling , each well was purged a minimum of four casing volumes . Groundwater samples were subsequently collected from well MW-1 , and from wells 1,114-4 through MW-8 using a clean teflon bailer . During ,well. insta-lla_tion., two soil samples were taken immediately above the water table , at a depth of ,3-feet:_* One sample was collected from well MW-6 and one from MW-8 . There was no evidence of gasoline saturation in the soil cuttings during well installation .