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1 <br /> readings) suggested all affected soils had been excavated. Excavation floor and wall <br /> confirmation samplings indicated that the impacted soil had been removed <br /> Soil analysis from samples collected at 40 and 45 feet below grade from soil boring MW 1 <br /> detected low levels of benzene, toluene, ethylbenzene, and xylenes in the unsaturated zone. <br /> Soil analysis, PID readings, and field observations collected from soil borings s MW2 and MW3 <br /> did not detect any petroleum hydrocarbons. <br /> ' Given the low concentrations of BTEX detected an the soil, and the fact that it is capped by a <br /> impermeable asphalt layer, no additional mitigative measures are recommended with regard to <br /> soil <br /> 5.2 Groundwater <br /> Initial laboratory analysis of groundwater samples collected from well MWl on September 14, <br /> 1990, detected low levels of toluene, ethylbenzene, xylenes, and TPHG. Three rounds of <br /> confirmation sampling of that well did not report any BTEX or TPHG above method detection <br /> limits except 0.6 ppb xylenes on February 2, 1992. The laboratory results for the above <br /> samples are summarized on Table 2. <br /> 1 <br /> Laboratory results of groundwater samples collected on May 5, 1992 from the three morutoring <br /> ' wells detected no dissolved hydrocarbon constituents, continuing to suggest that groundwater <br /> beneath the site has not been impacted. <br /> RESNA's next groundwater monitonng/sampling event as scheduled for August 1992. <br /> 1 <br /> R-06W92 rrL 8 <br />