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Paint Shop Pond

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Pre-Cleanup Investigations

Cleanup Plan

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The planned activities for the week of 12/17/2001 are as follows:

 

  1. Remedial excavation in remaining Southern Wetland area adjacent to main dewatering sump.
  2. Ongoing Paintshop Pond dam and wall restoration. Stone mason may begin mobilization.
  3. Southern wetland, wetland south of Paintshop Pond, and Waban Brook subgrade preparation and peat installation.
  4. Continue dewatering from temporary dewatering sump.
  5. Placement of fill and grading for the water quality swale located on the south side of the consolidation area berm.
  6. Continue managing soil in the consolidation area.
  7. Manufacture additional sand borrow or select borrow.
  8. Placement and compaction of semi-pervious fill adjacent to Paintshop Pond dam (weather permitting).
  9. Miscellaneous excavation of borrow soil and filling.
  10. Miscellaneous excavation of contaminated soil (if encountered).
  11. Continue subgrade grading on small portion of east field area to receive woven geotextile and sand borrow.
  12. Continue installation of woven geotextile fabric layer and 6-in. sand borrow layer on eastern field to prepare for HDPE liner installation (east field only).
  13. Install HDPE geomembrane and geocomposite drain over the east field.
  14. Ongoing management of partially-dewatered sediment from Northern Shoreline/Western Cove dredging in consolidation area.
  15. Continue re-dredging cells that were recontaminated by the trailing curtain.
  16. Dredge cell V3 in accordance with Department of Environmental Protection request.
  17. Treat soil/pigment (using ferrous sulfate as an amendment to the calcium polysulfide reagent).
  18. Mix in dry materials to reduce moisture content of treated material before excavating and relocating to consolidation area.
  19. Continue health and safety air monitoring.

    Activities conducted during the week of 12/10/01 include:
  1. Remedial excavation in remaining southern wetland area adjacent to main dewatering sump.
  2. Ongoing Paintshop Pond dam and wall restoration. Poured concrete pier footing for precast arch bridge sections, and other sections of wall.
  3. Proposed Southern wetland subgrade preparation and peat installation.
  4. Shut down main dewatering sump and removed equipment. Continue dewatering from temporary dewatering sump.
  5. Placement of fill for the water quality swale located on the south side of the consolidation area berm.
  6. Continued management of soil in the consolidation area.
  7. Miscellaneous excavation of contaminated soil (if encountered).
  8. Miscellaneous excavation of borrow soil and peat and filling where needed.
  9. Subgrade preparation filling and grading on east field area.
  10. Installation of woven geotextile fabric layer (addition to engineered barrier configuration) and 6-in. sand borrow layer on eastern field to prepare for HDPE liner and geo composite drain installation (east field only).
  11. Relocation and disposal of select drum contents in the consolidation area; empty drums staged outside consoilidation area for off-site management.
  12. Treated soil and pigment (using ferrous sulfate and/or calcium polysulfide reagent).
  13. Mixed dry material with treated soil to reduce moisture content to facilitate handling.
  14. Load out treated and tested soil.
  15. Completed re-dredging area NS-2.
  16. Began re-dredging area NS-1.
  17. Continue health and safety air monitoring.

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Maintained by the Office for Public Information
Last Modified: December 19, 2001
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