See POLREP #1 for a full description of the Site.
From May 1-29, the BOA contractor continued dewatering of the site through the use of vacuum trucks at various locations around the site (this activity was being performed while the new RP contractor mobilized to the site to begin response activities). Locations included the storm sewer system that runs parallel to the ODOT construction site for I-280; near the former ODOT mass excavation; and on-site in the tank farm. The BOA contractor also maintained the absorbent and hard booms at the Maumee River outfall. From May 30-June 28, the BOA contractor concentrated on the dewatering of the off-site storm sewer system while plans for a dual phase vapor/product recovery system were developed by the ERRS contractor. The ERRS contractor maintains and operates a mobile waste water treatment system and continues to treat, discharge and record water discharge to the Maumee River. From May 1-31, approximately 828,284 gallons of treated water was discharged to the Maumee River during this time period. START personnel used the AreaRAE air monitoring system to monitor the ambient air around the perimeter of the site. Three stations were set up along the eastern perimeter to monitor the air near the residential neighborhood, while the fourth station was setup along the western perimeter. Each unit is calibrated daily. Start personnel also monitors and documents air monitoring at off-site manholes and recovery wells with a multi-rae and at various locations around and on the site.
On May 1 to May 4, the RP's consultants conducted geo-probe activities along with Ground Penetrating Radar activities (GPR). The RP's consultant installed two temporary monitoring wells on-site. A total of 18 soil borings and two temporary monitoring wells were installed on site.
On May 8th the ERRS contractor changed out carbon vapor canisters for waste water treatment plant (WWTP) due to detected elevations in the effluent being discharged to the Maumee River.
From May 9-10, the RP's contractors installed a "pilot- scale" soil vapor extraction system on-site to reduce the potential for off-site air releases from the soil. The System consisted of two trenched areas approximately 4.0 feet below ground level (BGL) by 22.0 feet long and composed of 5-foot long 2 inch diameter PVC. This system was never put into operation due to permit requirements and the necessity to dewater the site.
On June 19, 2006 the RP hired new contractors (Tri County Services & Rentals, Inc. and ECT) to mobilize and begin construction of a geo-membrane (synthetic liner) that will be installed around the perimeter of the site. Workplans and Health and Safety Plans are still pending review by EPA.
ERRS contractor will remove product in the bedding of the ODOT Sewer System to prevent migration to the Maumee River. A Duel (water and gas) Vapor Recovery System (DVES) along the ODOT storm sewer system both north and south of the former mass excavation is planned.
BOA contractor will continue to de-water the ODOT storm sewer system to prevent migration of gasoline to the Maumee River.
The new RP consultant will submit Work Plans and Health and Safety Plans to the EPA for review. The Work Plans will include installation of the perimeter geo-membrane system to stop migration of product off-site.
- The BOA contractor will continue the de-watering of the off-site storm sewer system monitoring activities at the Maumee and participate in Site Safety.
- The ERRS contractor will continue to treat and discharge water collected from the off-site sewer system in the on site waste water treatment system.
- The ERRS contractor will continue to finalize and implement the Work Plans for the off-site soil/vapor recovery system.
As of May 13, 2006 - 20,200 gallons of product have been recovered from various locations around the site and the storm sewers.
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