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MORM <br /> 4 € e <br /> 1 In August and September 1989 WGR supervised the drilling of four soil borings,B-1 through B-4, <br /> 3 <br /> and completed them as monitor wells MW-1 through MW-4,respectively(Figure 3). Wel!MW-1 s <br /> was located adjacent to the former fuel tankpit,and MW-3 was located west of the former fuel tank. 9 <br /> Wells MW-2 and MW4 were located at the northeast and southeast corners of the API building, r <br /> ® •' <br /> respectively. TPPH was detected only in sail samples from boring B-1, at concentrations up to <br /> 5,200 ppm at a depth of 65.5 ft below ground surface (WGR Subsurface Investigation Report, <br /> November 1989). TPPH was detected in groundwater samples from monitor wells MW-1 and '# <br /> MW-3 at concentrations of 510,000 parts-per-billion(ppb)and 300 ppb,respectively. Benzene was <br /> detected in the groundwater samples from monitor wells MW-1,MW-2 and MW-3 at concentrations <br /> of 3,200 ppb,0.1 ppb and 3.0 ppb,respectively. Groundwater samples from monitor walls MW-1, <br /> MW-2 and MW-3 also contained",2-dichloroethane(1,2-DCA)at concentrations of 2,100 ppb,20 <br /> ppb and 8 ppb,respectively. <br /> 4 � <br /> r <br /> v <br /> S 3 1 <br /> R <br /> 7 ' <br /> is <br />� 1 <br /> f <br /> 066RULU.va 4 <br /> t . <br /> 1. <br /> 1. <br />