Oklahoma Valley River Case Study
Physical Characteristics
The site is located in an industrial and residential area in northeast Oklahoma City, Oklahoma (Section 31, Township 12 North, Range 2 West). The site is located on the south side of Tenth Street between Bryant Avenue and the North Canadian River and covers approximately 3.5 acres. One residence is located adjacent to the west side of the site. Residential subdivisions are located approximately one block to the north and approximately one block to the west of the site.
Aerial photos show that in 1951 a meander loop of the North Canadian River cut almost directly through the site, making the Site subject to a 100-year flood. Between 1951 and 1954, the river was channelized and levees were constructed on both sides of the …show more content…
The scope of the response action was to address the principal threat at the site by preventing current or future exposure to the contaminated soil through treatment and/or containment, and reducing or controlling the potential migration of contaminants from the soil to ground water.
Remedy Selection
A proposed plan for the site was issued in August 1990, presenting the preferred alternative of chemical dechlorination of the contaminated soil. The EPA Regional Administrator for Region 6 signed a Record of Decision (ROD) on September 27, 1990. In the ROD, EPA selected Alternative 4 Excavation, Onsite Chemical Treatment, as the remedy for the Tenth Street Superfund Site. As noted in the ROD in the "Statement of Basis and Purpose", the State of Oklahoma (State) did not support the original remedy selected in the ROD.
The major components of the Selected Remedy included:
• Removal of the existing red clay cover and the visqueen plastic liner placed during the removal
The site is located in an industrial and residential area in northeast Oklahoma City, Oklahoma (Section 31, Township 12 North, Range 2 West). The site is located on the south side of Tenth Street between Bryant Avenue and the North Canadian River and covers approximately 3.5 acres. One residence is located adjacent to the west side of the site. Residential subdivisions are located approximately one block to the north and approximately one block to the west of the site.
Aerial photos show that in 1951 a meander loop of the North Canadian River cut almost directly through the site, making the Site subject to a 100-year flood. Between 1951 and 1954, the river was channelized and levees were constructed on both sides of the …show more content…
The scope of the response action was to address the principal threat at the site by preventing current or future exposure to the contaminated soil through treatment and/or containment, and reducing or controlling the potential migration of contaminants from the soil to ground water.
Remedy Selection
A proposed plan for the site was issued in August 1990, presenting the preferred alternative of chemical dechlorination of the contaminated soil. The EPA Regional Administrator for Region 6 signed a Record of Decision (ROD) on September 27, 1990. In the ROD, EPA selected Alternative 4 Excavation, Onsite Chemical Treatment, as the remedy for the Tenth Street Superfund Site. As noted in the ROD in the "Statement of Basis and Purpose", the State of Oklahoma (State) did not support the original remedy selected in the ROD.
The major components of the Selected Remedy included:
• Removal of the existing red clay cover and the visqueen plastic liner placed during the removal