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HRq <br /> KIEINF- <br /> EEDER <br /> 6 DISCtJSS101Y <br /> } <br /> r 6.1 SITE GEOLOGY AND <br /> x HYDROGEOLOGY <br /> Subsurface softs encountered in the exploratory borings; <br /> clay to Silty gs drilled on-site ranged from siI <br /> ty gravels. Generally,a brown to black clay was encountered tt ty <br /> two feet below the ground surface to a from approximately <br /> Below this dark cla PProidmately ten feet below the ground surface. <br /> Y, a green to grey sand was encounter <br /> encountered at the cl - ed. ij <br /> ay sand interface. Ground water was <br /> phis sand was encountered <br /> boring. The logs of the exploratoto the bcattoxn of each <br /> boring <br /> wells were completed in three of the seven borehoIesr''Mndix A. Ground <br /> water monitoring <br /> as shown an thG Site Plan(Plate 2), ' <br /> Ground eater at the site wasever <br /> ten feet below the g �Y encountered within the sand <br /> ground surface. On June 29 Jul 11 units approximately j <br /> ground'w'ater measurements were Y , and October 4, 1989, depth to <br /> made and recorded. Groundwater <br /> estimated Noxa each of these measurements; flow erections were t <br /> Plate 3 shows the approximate o <br /> flow direction, based upon June 29, depth to PP grand water <br /> direction is a P water measurements. Ground water flow <br /> approximately towards the southwest ata ro ' <br /> .- Lstixnates of ground water flour dire PP xunately 0.002 to 0.004 ft/ft. <br /> _ were recorded. coons were similar on other da which rmeasuremexxts <br /> ' 6.2 SOILASSESSl14ENT <br /> Soil samples analyzed indicated the <br /> presence of total hydrocarbons is borings x and toluene,ethyl benzene and len B-1 and B-2, t <br /> 2• Benzene�v xylenes at 1.6,2.4,and 0.7 mg/kg,as not detected in the eight samples g/ 8�respcctivel <br /> results from tlxe soil sate Ies. Y,in boring B_ <br /> F P �alyzed. Table 2 resents <br /> SP Analytical reports appear in Appendix C. <br /> the analytical { <br /> Ground water results indicate that gasoline hydrocarbons�. <br /> soil sample results do not indicate the source area o are present in ground water. The <br /> r Of hydrocarbons-leak. <br /> !� results and on-s <br /> - --- —Laborato <br /> source,however,the t g the tank removal a r3' — - - - <br /> anks did not appear to have leaked• PPe� to indicate an on-site <br /> m <br /> a <br /> L <br /> fut E13MM-001-89-mi <br /> } 15Iwi <br /> IT <br /> 1 r r <br />