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I <br /> detected in any of the other soil samples collected. Petroleum hydrocarbon constituents were not <br /> detected in any of the soil samples. Analytical results of soil samples;are summarized in Table 1. ! <br /> 4_2 Groundwater Contamination <br /> a <br /> L' Toluene was detected in the grab groundwater samples collected from soil borings SB 1 an <br />; P ,. g d SBS <br /> fat a concentration of 0.6 micrograms per liter (ug/1). No other petroleum hydrocarbon r <br /> constituents were detected in the grab groundwater samplesitcollec':ted from borings SBI, SB2, <br /> SB3, and SB4. The groundwater sample from monitoring well MuWI contained no detectable <br /> it, ji <br /> concentrations of petroleum hydrocarbon constituents. Grab groundwater sample from soil <br /> borings SBI, SB2, SB3, SB4, and SB5 contained total lead at concentrations ranging from 410 <br /> ug/l to 1,500 ug/l. The groundwater sample from groundwater monitoring well MMI contained <br /> no detectable concentrations of total lead. Analytical results of groundwater samples are <br /> summarized in Table 2. <br /> 5.0 RECOMMENDATIONS <br /> r F Analytical results for soil samples are generally consistent�s with ;field observations and PID <br /> L� readings. Based on the analytical results and field'observations, the soil beneath the site does not <br /> appear to be impacted by petroleum hydrocarbons. The grab groundwater samples collected from <br /> borings SB 1 and SB5 contained toluene at a concentration slightly greater than the detection limit <br /> of 0.5 ppb, but well below the maximum contaminant level of 150 ug/l. The grab groundwater <br /> samples from soil borings SB2, SB3, and SB4 contained;, no detectable concentrations of <br /> petroleum hydrocarbons. The groundwater sample collected from monitoring well MW 1 and the <br /> on site domestic well contained no detectable concentrations of petroleum hydrocarbons. <br /> Groundwater does not appear to be impacted. Therefore, Smith Technology recommends no <br /> further action and that site closure beranted upon the approval of the PHS/EHD. Once <br /> g P PP l <br /> approval has been granted, arrangements will be made for the' abandonment of monitoring well j <br /> MW1 and the disposal of the drummed soil and groundwater. <br /> �1 f <br /> w:\90954\90954.03\reports\psi.d- 6 <br /> SMTH <br />