Site Name: REEVES SOUTHEAST GALVANIZING CORP
EPA ID: FLD000824896 EPA Region: 04 Metro Statistical Area: 8280
9510-20 E BROADWAY, TAMPA, FL 33619
Operable Unit: 01
ROD ID: EPA/ROD/R04-93/134 ROD Date: 09/09/09
Contaminant: VOC, Other Organics, Metals
O&M Costs: $7,000 Estimated Costs: $551,000
Keys: Arsenic; Benzene; Capping; Carcinogenic Compounds; Chromium; Clean Air Act; Clean Water Act; Direct Contact; Excavation; Filling; Ground Water Monitoring; Institutional Controls; Interim Remedy; Lead; MCLs; MCLGs; Metals; O&M; Oils; Onsite Containment; Onsite Disposal; Onsite Treatment; Organics; PAHs; PCBs; Pesticides; RCRA; Safe Drinking Water Act; Sediment; Soil; Solidification/Stabilization; Solvents; State Standards/ Regulations; Treatment Technology; VOCs; Water Quality Criteria
Abstract:
The 28.96-acre Reeves Southeastern Galvanizing (Operable Unit 1) site consists of the 17.36-acre Reeves Southeastern Galvanizing (SEG) facility and the 11.6-acre Reeves Southwestern Wire (SEW) facility, located in Hillsborough County, Florida. Land use in the area is predominantly industrial or undeveloped. Two additional Superfund sites, the Peak Oil site and the Bay Drums site, are located in the adjacent area to the west of this site. The topography is generally flat and contains small wetland areas to the south of the site. The largest building on the SEG facility is where commercial steel products are pre-treated and galvanized. There is also a small office building and maintenance shed. Two inactive liquid waste percolation/evaporation ponds, a wastewater pretreatment facility, and a double-lined storage basin for settled solids are also located on the SEG portion of the site. The largest building on the SEW facility is where steel wire is drawn, weaved into chain link fence, pre-treated, and galvanized. The smaller building on the facility is an office building. There are also three former percolation/evaporation ponds located on the SEW. The currently-owned Southeastern Galvanizing Corporation facility began operations in the mid-1960s using a 300-gallon tank in the maintenance shed as a wastewater catch basin during electroplating. The SEG facility utilized two depressions as percolation/evaporation ponds for their wastewater until 1982, when the current wastewater pretreatment system was installed. Wastewater from the facility is currently discharged to the local POTW. The SEW facility began operations in 1955, at which time the first percolation/evaporation pond for disposal of the SEW's wastewater was used until it was backfilled in the late 1960s. A second pond was constructed prior to 1969 and used until 1980, when the SEW began using its wastewater pretreatment program. In 1981, an EPA investigation identified elevated metal levels in the surface water and ground water at the SEG facility. Subsequent studies conducted by Reeves and the State indicated a possible ground water contamination problem in the surficial aquifer underneath both facilities, as a result of past disposal operations. This ROD addresses the first of two remedial actions for the contaminated soil and sediment at the SEG and SEW facilities, as OU1. A future ROD will address contamination in the ground water, waste ponds, and wetlands, as OU2. The primary contaminants of concern affecting the soil and sediment are VOCs, including benzene; other organics, including oils, PAHs, PCBs, and pesticides; and metals, including arsenic, chromium, and lead. SELECTED REMEDIAL ACTION: The selected remedial action for this site includes excavating approximately 6,000 yd[3] of contaminated soil and sediment from the two facilities, followed by onsite ex-situ solidification/stabilization to prevent both current direct contact risk and continued migration of contamination into the ground water; backfilling the excavated areas to grade; disposing of the solidified material above ground where the SEG ponds formerly existed; capping the stabilized material; monitoring ground water; and implementing institutional controls, including deed and land use restrictions. The estimated present worth cost for this remedial action is $551,000, which includes an annual O&M cost of $7,000. PERFORMANCE STANDARDS OR GOALS: Risk-based action levels are based on a cancer risk of 10[-4]. Chemical-specific soil and sediment cleanup goals are based on State and Federal MCLs and MCLGs, and include chromium 69 mg/kg; lead 280 mg/kg; and zinc 10,860 mg/kg. INSTITUTIONAL CONTROLS: Deed restrictions or some other type of land use restrictions will be implemented onsite to prevent any activity that could damage the solidified/stabilized material.
Remedy:
This operable unit is the second of two operable units planned for the site. The first operable unit selected for this site involve the remediation of the soils/sediment on the site. The second operable unit, the subject of this ROD, addresses the contamination in the Northern Surficial Aquifer. Potential ingestion of water extracted from this aquifer poses the principal threat to human health because EPA's acceptable risk range is exceeded and concentrations are greater than MCLs.
The major components of the selected remedy include:
* Implementation of Operable Unit One as selected in the October 1992 Operable Unit One Record of Decision;
* Natural attenuation of the Northern Surficial Aquifer;
* Installation of additional monitor wells in the Northern Surficial Aquifer;
* Prevention of discharge of groundwater from the Northern Surficial Aquifer into the surface water in the unnamed creek;
* Installation of a monitor well in the Upper Floridian Aquifer in the general vicinity of the former production wells on the Reeves SEG facility;
* Implementation of an intensive well survey within a one mile radius of the site;
* Completion of the remedial design for the contingency remedy.
The cost of the selected remedy, not including the cost of Operable Unit One, is $136,000.
If satisfactory progress, as defined in the Decision Summary, is not made by the natural attenuation process, then the contingency remedy shall be implemented. The major components of the contingency remedy include:
* Extraction of contaminated groundwater from the Northern Surficial Aquifer;
* Treatment of extracted groundwater by chemical precipitation to remove heavy metals;
* Discharge of treated groundwater into local POTW.
The cost of the contingency remedy is $2,504,000.
Operable Unit: 02
ROD ID: EPA/ROD/R04-93/149 ROD Date: 09/09/09
Contaminant: Metals
O&M Costs: Estimated Costs: $136,000
Keys: Arsenic; Carcinogenic Compounds; Chromium; Clean Water Act; Contingent Remedy; Direct Contact; Ground Water; Ground Water Monitoring; Ground Water Treatment; Institutional Controls; Lead; MCLs; MCLGs; Metals; Onsite Treatment; Plume Management; Publicly Owned Treatment Works; Safe Drinking Water Act; State Standards/Regulations; Surface Water Collection/Diversion; Water Quality Criteria
Abstract:
The 28.96-acre Reeves Southeastern Galvanizing (Operable Unit 2) site consists of the 17.36-acre Reeves Southeastern Galvanizing (SEG) facility and the 11.6-acre Reeves Southwestern Wire (SEW) facility, located in Hillsborough County, Florida. Land use in the area is predominantly industrial or undeveloped, with the nearest residence located 0.25 miles from the site. Two additional Superfund sites, the Peak Oil site and the Bay Drums site, are located in the adjacent area to the west. Small wetland areas are located to the south of the site, and there are also two surficial aquifers, the Northern Surficial Aquifer and the Floridian Aquifer, underlying the site. Buildings at the SEG facility include a commercial steel products building where materials are pre-treated and galvanized, a small office building, and a maintenance shed. Two inactive liquid waste percolation/evaporation ponds, a wastewater pretreatment facility, and a double-lined storage basin for settled solids are also located on the SEG portion of the site. Buildings at the SEW facility include the main building where steel wire is drawn, weaved into chain link fence, pre- treated, and galvanized, and an office building. There also are three former percolation/evaporation ponds located on the SEW property. The SEG facility began site operations in the mid-1960s and used a 300gallon tank in the maintenance shed as a wastewater catch basin during electroplating. The SEG facility also utilized two depressions as percolation/evaporation ponds for their wastewater until 1982, when the current wastewater pretreatment system was installed. Wastewater from the facility is currently discharged into the local POTW. The SEW facility began operations in 1955, at which time the first percolation/evaporation pond for disposal of the SEW's wastewater was used until it was backfilled in the late 1960s. A second pond was constructed prior to 1969 and used until 1980. The SEW began using its wastewater pretreatment program and discharging into the local POTW in 1980. In 1981, an EPA investigation identified elevated levels of heavy metals in the surface water and ground water at the SEG facility. Subsequent studies conducted by Reeves and the State indicated a possible ground water contamination problem in the surficial aquifer beneath both facilities, as a result of past disposal operations. Another FY93 ROD addressed contaminated soil and sediment at the SEG and SEW facilities, as 0U1. This ROD addresses the contaminated ground water in the Northern Surficial Aquifer, as 0U2. The primary contaminants of concern affecting the ground water are metals, including arsenic, chromium, and lead. SELECTED REMEDIAL ACTION: The selected remedial action for this site includes allowing for natural attenuation of the Northern Surficial Aquifer; installing additional ground water monitoring wells in the Northern Surficial Aquifer and the Upper Floridian Aquifer; preventing the discharge of ground water from the Northern Surficial Aquifer into the surface water of an unnamed creek; implementing a well survey; providing for a contingency remedy, including extraction and treatment of ground water using chemical precipitation to remove heavy metals, and discharging the treated water into the POTW, if satisfactory progress is not made by the natural attenuation process; monitoring the ground water to follow the progress of the natural attenuation; and implementing institutional controls, including ground water use restrictions. The estimated present worth cost for this remedial action is $136,000. PERFORMANCE STANDARDS OR GOALS: Chemical-specific ground water cleanup goals are based on SDWA MCLs and MCLGs, EPA action levels, and State levels, and include arsenic 50 ug/l; cadmium 5 ug/l; chromium 100 ug/l; lead 15 ug/l; nickel 100 ug/l; and zinc 10,000 ug/l. INSTITUTIONAL CONTROLS: Ground water use restrictions will be implemented to prevent the use of ground water until cleanup levels are achieved.
Remedy:
This operable unit is the first of two operable units planned for the site. The first operable unit for this site will involve the remediation of the soils/sediment on the site. This action will address the principal threat by solidifying/stabilizing the contaminated soils/sediment.
The major components of the selected remedy include:
* Excavation of approximately 6,000 cubic yards of contaminated soils/sediment
* Ex-situ solidification/stabilization of contaminated soils/sediment
* Onsite disposal of solidified/stabilized material above the water table and capping.