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i <br /> 1 former groundwater interface (45 feet), were analyzed for TPH as gasoline and volatile <br /> aromatics (BTE&X). A water sample was also collected from each well. No TPH or <br /> BTE&X were detected in the soil or water samples.The results of this investigation defined <br /> the limits of groundwater impact and confirmed that the extent of petroleum hydrocarbons <br /> in soil had been delineated by previous stages of the investigation. <br /> ' 2.6 Quarterly Groundwater Monitoring <br /> iQuarterly monitoring of groundwater at the site was initiated by GeoAudit in October 1992. <br /> Three of the five wells were monitored at that time; MW-2 and MW-3 were still dry and <br /> could not be sampled. Increases in the concentration of most constituents were noted in the <br /> iOctober 1992 event. <br /> ' After installation, MW-6, MW-7 and MW-8 were added to the quarterly monitoring <br /> program. MW-2 and MW-3 remained dry and the gradient continued to be to the southwest. <br /> Wells at the site have been monitored five times since October 1992. <br /> i2.7 Final Remedial Plan Preparation <br /> ' A Draft Final Remedial Plan (FRP) was prepared by GeoAudit in July 1994. The FRP <br /> outlines soil and groundwater remediation for the site. A revised FRP is tentatively <br /> scheduled to be completed in August 1994 with implementation beginning in September <br /> 1994. <br /> ' 3.0 PROCEDURES <br /> 3.1 Monitoring Well Sampling <br /> ' On June, 28, 1994, the water levels in each well (except MW-2) were measured relative to <br /> the top of the casing using a Solinst water level meter (Table 1). <br /> iAfter water levels were measured, a 2" submersible Grundfos pump was used to purge <br /> standing water from MW-4, MW-5, MW-6 and MW-8. Because of poor recharge, a clean <br /> iPVC bailer was used to surge and purge wells MW-1, MW-3 and MW-7. <br /> Between 6 and 10 gallons of water were removed from MW-4, MW-5, MW-6 and MW-8 to <br /> stabilize temperature, pH and conductivity. However, only 2 gallons of water could be <br /> purged from MW-1 and less than one gallon could be removed from MW-3 and MW-7. <br /> The purge water was stored in 55-gallon drums on-site. Field data sheets are included in <br /> iAppendix A. <br /> Water samples were collected using new disposable plastic bailers. The samples were <br /> collected in 40-m1 EPA vials. However, MW-3 did not recharge and therefore, no sample <br /> o.d A-*a.m.d,i.e. <br /> AM Q NF.4 Q;L4/& t.47 <br />