1. Status of Sediment and Groundwater Remedies

2. Or… What’s up with that O&F Determination?

3. Last Annual Meeting Recap The Road to Operation and Maintenance (O&M) Measures initiated after remedy has achieved the remedial action objectives in the ROD, and has been determined to be Operational and Functional Measures are designed to ensure the remedy remains protective of human health and the environment, and maintain the integrity/effectiveness of the remedy

4. Last Annual Meeting Recap EPA and DEQ Cooperative Agreement Two year agreement describing activities and funding necessary for an O&F Determination Target O&F determinations for both Sediment and Groundwater remedies by end of first year - September 30, 2010

5. Last Annual Meeting Recap O&F: Remedies are Performing as Designed Key Activities: Water sampling, inspections (bathymetry, divers), groundwater monitoring, NAPL recovery and measurement Sheen Characterization

6. Last Annual Meeting Recap Long Term Performance Monitoring - Brainstorming Porewater monitoring only SPME vs. “Traditional” Inter-armoring and surface water data meets cleanup goals Increases in porewater sampling would trigger additional assessment Other sampling media - clams

7. Last Annual Meeting Recap Continue NAPL Recovery? Why? ROD Requirements When do we stop? Decline curve - recovery is asymptotic Reassess how much can be recovered Revisit previous recovery efforts, incl. 2006 ITE Consider better recovery method than the current one

8. EPA and DEQ Decisions September 30, 2010 is too soon for O&F Determination Possible to make an O&F determination on the Sediment Remedy within cooperative agreement time frame, and Consider differing the O&F determination on the groundwater remedy Still recovering NAPL Timing with the Portland Harbor ROD - 2013

9. EPA and DEQ Decisions Modified Cooperative Agreement activities Scope more effective NAPL recovery system - draft design and cost CA activity reassessment to shift funding to pay for NAPL recovery system design and construction Reduce site inspections/meetings Use Bathymetry data from 2009 Portland Harbor survey Revisit site-wide groundwater monitoring plan Final sediment cap sampling: SPME in October 2010

10. Road to O&F Realigned O&F Determination for the Sediment Cap Remedy – September 30, 2011 Long term O&M Plan Modified DEQ and EPA agreements NAPL recovery system constructed Regulatory Remedial Action Report Five Year Review Target O&F Determination for the Groundwater Remedy September 30, 2013