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r�' • sl <br /> • CHARACTERIZATION/REMEDIAL STATUS <br /> Impacted soil delmeated9 Lateral Ye <br /> Vertical Ye <br /> Impacted groundwater delineated? N <br /> Current Phase of Project? Groundwater monitoring and Assessmen <br /> Frequency of Sampling9 Quarterl <br /> Current Remediation Techniques9 N/ <br /> Soil remediation in progress9 N <br /> Anticipated start? NI <br /> Anticipated completion? N/ <br /> Groundwater Gradient9 North at 0 0015 ft/f <br /> Dissolved/free product remediation in progress9 N <br /> Anticipated start? N/ <br /> Anticipated completion? NI <br /> CONCLUSIONS: <br /> The lateral extent of soil impacts is generally defined with the exception of the capillary fringe <br /> The off-site soil impacts are likely due to migration of impacted groundwater away from the site <br /> • Off-site upgradient groundwater impacts are delineated by well MW-8 Groundwater sampling <br /> results for off-site wells MW-5, MW-6, and MW-9 indicate that the groundwater impacts are <br /> undefined downgradient of the site The highest detected dissolved benzene and MTBE <br /> concentrations are in well MW-5, located approximately 30 feet downgradient of the USTs <br /> RECOMMENDATIONS: <br /> IT recommends preparing a workplan for further groundwater investigation that includes a <br /> groundwater grab sampling program to further delineate the shallow groundwater impacts The <br /> grab sample data will be evaluated prior to proposing monitoring well locations The tentative <br /> schedule for further assessment is 1) workplan submittal in the third quarter 2001, 2) obtaining <br /> access agreements and encroachment permits at the end of the third quarter or beginning of the <br /> fourth quarter 2001, and 3) implementation of the assessment in the late third quarter or early <br /> fourth quarter 2001 <br /> CONSULTANT: IT Corporation <br /> 8221211822125 1 a doc 3 07/12/01 <br />