Following are brief descriptions of some projects that Chastain-Skillman's Environmental Risk Management professionals have worked on. This is by no means an exhaustive list, but should
give you an idea of the scope of work that we have done.
| Hillsborough County Public Schools (2004)
Chastain-Skillman was retained by Hillsborough County Public Schools to conduct an Environmental Site Assessment of a citrus grove and packing facility near Valrico, Florida. The approximate 30-acre parcel under consideration included a small packing plant, pesticide storage/mixing areas, petroleum storage systems, and citrus groves. Chastain-Skillman conducted the following major tasks as part of the evaluation of this facility:
Chastain-Skillman worked closely with the client and client’s legal counsel, as well as with the representatives of the Seller to evaluate and address the recognized environmental conditions identified at the site.
- A Phase I Environmental Site Assessment in accordance with ASTM Document E 1527-00;
- A limited Phase II Environmental Site Assessment, including soil and ground water testing to evaluate the recognized environmental conditions identified during the Phase I ESA;
- An evaluation of source removal issues related to confirmed pesticide-related soil impacts.
| Tenoroc Fish Management Area Effluent Reuse/Wetland Improvement Project (2003)
The Tenoroc Fish Management Area consists of 6,040 acres of abandoned and partially reclaimed phosphate mine. In order to create appropriate wetland habitat, the Tenoroc Wetland Improvement Project needed a source of water to rehydrate the wetlands. The City of Auburndale recently completed its Regional Wastewater Treatment Plant (RWTP), which is located adjacent to the Tenoroc Fish Management Area. The plant capacity was limited by the need for more capacity for effluent disposal.
Chastain-Skillman's ERM Hydrogeologists were retained to determine the feasibility of spraying treated effluent from the RWTP onto a portion of the Tenoroc Property adjacent to a wetland area. The project needed to determine the quantity of water that would cause the effluent to infiltrate into the ground-water system, cause seepage of the ground water into the adjacent wetland, and rehydrate that wetland while adhering to all regulatory limitations regarding no overland flow of the effluent.
In order to perform a reasonable analysis, Chastain-Skillman performed a geologic and hydrogeologic investigation of the property proposed for the spray irrigation. The investigation included the installation of monitor wells, double-ring infiltrometer testing to determine the permeability of the unsaturated zone, slug-testing, ground-water quality sampling of the monitor wells, ground-water elevation monitoring over a period of six months, as well as consideration of anticipated typical rainfall amounts. The appropriate quantity of water to be sprayed on the site was then determined through a ground-water mounding analysis.
| Highlands Solid Waste Management Center (2001)
Highlands County, Florida
Chastain Skillman was retained by the Highlands County Solid Waste Department to design an expansion and upgrade to the existing leachate sprayfield at its Class 1 Landfill. Because of planned expansions at the facility, the landfill needed additional area for disposal of its leachate.
The landfill leachate recirculation system, in conjunction with its leachate wastewater treatment system, transports liquid captured from the solid waste matrix. This liquid leachate is disposed of by means of controlled land application to an existing sprayfield. While the existing sprayfield encompassed 15 acres, the expansion provided an additional 17 acres of disposal area. This additional capacity will allow the County to move forward with improvements to and expansion of the leachate wastewater treatment plant.
| Region IV Superfund Site (1995)
Southeastern United States
Chastain-Skillman was retained by a PRP group at a high visibility, Region IV Superfund Site to provide Independent Quality Assurance Inspector (IQAI) services during construction and start-up of a Soil Vacuum Extraction (SVE) Remedial System. The SVE system was designed to extract and remediate over 20 semi-volatile and volatile organic contaminants (VOCs) from the soil vadose zone. The SVE system consists of 19 SVE extraction wells, manifold systems, vapor/liquid separator tank, 600 SCFM SVE unit, 1000 SCFM Catalytic Oxidizer, and an extracted liquid storage tank. All treatment system components are located within a secondary containment structure.
In addition, based upon our performance during the SVE project phase, Chastain-Skillman was also contracted to provide IQAI services for the construction and start-up phases of the groundwater remediation systems.
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