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Riverfront Operable Unit 1 (Front Street Site)

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Site Description

The Operable Unit 1 (OU1) project site encompasses one acre in downtown New Haven, MO. Soil and groundwater are contaminated with perchloroethylene (PCE). The volume of waste is approximately 30,000 cubic yards.

Current Site Status and Cleanup Actions to Date

  • The Remedial Design (RD) for OU1 was approved on September 30, 2004. The design provides specifications for the remedial activities which include:
    • groundwater and surface water monitoring;
    • installation of one Advanced Remedial Technology (ART) well (intended to shorten the projected life span of the PCE plume); and
    • institutional controls.
    An ART well is an innovative technology consisting of an in-well stripper and a soil vapor extraction (SVE) (PDF) (80 K, 2 pp) system built into one well. The air stripper (PDF) (530 K, 2 pp) will treat the contaminated groundwater and, because it functions as a SVE well, contaminated soils in the vadose zone above the plume will also be treated. The ART well will be placed in the "hot" zone remediating the contamination within 100 feet in diameter, thus affecting the head of the plume and shortening its life span. Effectiveness of the ART well will be measured by groundwater monitoring.
  • The city of New Haven is currently redeveloping the historic downtown, in which OU1 is located. The development authority has purchased the site for reuse, and redevelopment activities are ongoing. Initial completed activities include the demolition of one building and placement of new siding on the remaining structure, which will be used for community meetings. Open areas remain, providing parking space for community festivities. This community space is geographically close to the river where the nearby Department of Conservation river access boat ramp will enhance boating activities.
  • Institutional controls via a restrictive covenant and easement are in place and ensure safe use of the site and restricted access to contamination which remains at depth. An additional governmental control may take the form of listing the Riverfront site on the Missouri State Registry of Confirmed, Abandoned, or Uncontrolled Hazardous Waste Disposal Sites.

Current Funding Status

  • Thus far, this project has received $733,242 for cleanup activities.

Key Accomplishments

  • The city of New Haven is currently redeveloping the historic downtown, in which Riverfront Operable Unit 1 (OU1) is located. The development authority has purchased the site for reuse, and redevelopment activities are ongoing.
  • Initial completed activities include the demolition of one building and placement of new siding on the remaining structure, which will be used for community meetings. Open areas remain, providing parking space for community festivities. This community space is geographically close to the river where the nearby Department of Conservation river access boat ramp will enhance boating activities.
  • Institutional controls via a restrictive covenant and easement are in place and ensure safe use of the site and restricted access to contamination which remains at depth.

 

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