ARCHIVED REPORTS XR0000784 - Laserfiche WebLink

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• ANTICIPATED NEXT QUARTER ACTIVITIES • Conduct Quarterly sampling event • Prepare and submit workplan for additional site characterization r CHARACTERIZATION/REMEDIAL STATUS Impacted soil delineated9 Lateral Yes Vertical Yes Impacted groundwater delineated9 No Current Phase of Project? Groundwater monitoring and Assessment Frequency of Sampling? Quarterly Current Remediation Techniques? NIA Soil remediation in progress? No Anticipated start9 N/A Anticipated completion? N/A Groundwater Gradient? North at 0 0015 ft/ft Dissolved/free product remediation in progress? No • Anticipated starts N/A Anticipated completion? NIA CONCLUSIONS: The lateral extent of soil impacts is generally defined with the exception of the capillary fringe The off-site soil impacts are likely due to migration of impacted groundwater away from the site Off-site upgradient groundwater impacts are delineated by well MW-8 Groundwater sampling results for off-site wells MW-5, MW-6, and MW-9 indicate that the groundwater impacts are undefined downgradient of the site The highest detected dissolved petroleum hydrocarbon concentrations are in well MW-6, located approximately 70 feet downgradient of the USTs RECOMMENDATIONS: IT recommends conducting the second quarter groundwater monitoring event to verify the results of the initial sampling of the five new monitoring wells After evaluating the data, IT recommends preparing a workplan for further groundwater investigation that includes a groundwater grab sampling program to further delineate the shallow groundwater impacts The grab sample data will be evaluated prior to proposing monitoring well locations. The tentative schedule for further assessment is 1) workplan submittal in the beginning of the . third quarter 2001, 2) obtaining access agreements and encroachment permits at the end of 9110052A/1Q99QSR 3 03/14/01