Commercial and Industrial Contamination Assessment and Remediation
CES prepares site assessment reports (SARs), contamination assessment reports (CARs), and remedial action plans (RAPs) for commercial and industrial sites known or suspected to be contaminated with petroleum, solvents, heavy metals, pesticides, and herbicides. Typical facilities we have investigated include underground and aboveground tank farms, chemical mixing and storage areas, agricultural sites, and manufacturing facilities. Get more information about some of our recent projects below.
Former Condenser Products Solvent Assessment
We conducted and assessment of solvents in soil and groundwater at an electronics manufacturing facility. Solvent contamination occurred over several decades due to the improper disposal of spend solvents on the ground outside of the building. Contamination was initially discovered in the 300-foot-deep on-site potable supply well, which had to be abandoned.
Assessment activities included determination of complete site history, advancement of test borings, installation of shallow and deep monitor wells, and the collection and analysis of soil and groundwater samples. Fully delineated lateral and vertical extent of solvent impacts in both soil and groundwater. Currently negotiating closure options for one-acre groundwater plume with FDEP; goal is to achieve closure through Natural Attenuation Monitoring, which will save owner up to &1 million in cleanup costs.
Hernando Co. DWP Hazardous Waste and Petroleum Assessment
Implemented assessment of 5-acre former fleet maintenance facility that featured 31 Areas of Concern (AOC’s), including leaking underground storage tanks (LUSTs), vehicle maintenance garage, pesticides storage and mixing area, leaking asphalt emulsion storage tanks, industrial waste water discharges, and paint marking equipment storage and maintenance areas. Contaminants of concern included petroleum hydrocarbons, solvents, pesticides, and metals including arsenic, barium, chromium, lead and selenium. Affected media include perched zone and Floridan aquifer groundwater, shallow and deep soil and limestone, and stream sediment. Work included completion of more than 500 soil borings using a combination of direct-push technology (DPT), hollow-stem auger/split spoon, sonic coring, and hand auger methods; Installation of 89 monitoring wells, including 19 vertical delineation wells; collection and analyses of soil and groundwater samples; aquifer performance tests (APTs), and discrete-interval aquifer packer tests. Conducted interim source removal along site perimeter and in surrounding residential areas to eliminate exposer.
Neon Cowboy Petroleum Assessment and Remediation
Conducted an assessment and cleanup of a petroleum release at a contry store located within the cone of depression of a large Pasco \county public well filed. The assessment included the installation of numerous soil borings and shallow and deep monitor wells. Testing showed that the petroleum contaminants had breached the confining unit beneath the site and were in the Floridan aquifer putting the well field at risk. Following SAR approval, developed and implemented a remedial action plan (RAP) to address impacted shallow soils and perched zone and Floridan aquifer groundwater. System was constructed per the design specifications. This was a difficult contamination remediation project due to the depth to groundwater (58 feet), the heterogeneous subsurface lithology (sands and clays overlying limestone), and migration of the plume beneath a state highway. Work activities included evaluation of remedial alternatives, installation of pilot test wells, air sparge/soil vapor extraction pilot testing, preparation of a remedial action plan recommending air sparging and soil vapor extraction (AS?SVE) augmented with multi-phase extraction (MPS), development of design drawings, solicitation of construction bids, selection of contractors, installation of AS and SVE wells, system installation and construction oversight, and system commissioning and start-up.
Pawn Shop Petroleum Assessment and Remediation
Conducted an assessment and cleanup of a petroleum release from oldest gasoline station in Brooksville, only several blocks from the Lamar Street wellfield. Assessment included drilling multiple soil boring and installing both shallow perched zone and deep Floridan aquifer monitor wells. Following SAR approval, developed and implemented a Remedial Action Plan (RAP) to address impacted media. Work activities included evaluation of remedial alternatives, installation of pilot test wells, air sparge/soil vapor extraction pilot testing, preparation of a remedial action plan recommending air sparging and soil vapor extraction (AAS/SVE) augmented with multi-phase extraction (MPE), development of design drawings, solicitation of construction bids, installation of AS and SVE wells, system installation and construction oversight, and system commissioning and start-up. At the completion of remediation, the system was removed and the site was restored to its original condition.
V.E. Whitehurst & Sons, Inc. Waste Oil Assessment and Remediation
Conducted assessment, remediation, and post-cleanup monitoring for discharges associated with former truck wash and oil/water separator at an active asphalt plant. Assessment included installation and sampling of 53 shallow soil borings and 14 groundwater monitoring wells. Following approval of site assessment, designed a site remediation strategy consisting of soil excavation to remove impacted soils that were acting as a source of hydrocarbons to groundwater, and application of bio-enhancement products to remediate residual hydrocarbons in soil and groundwater. A total of 16,990 gallons of groundwater was recovered by the dewatering system and properly disposed. Confirmatory side-wall and pit bottom samples showed that all petroleum-impacted soils were successfully removed. Post-excavation groundwater monitoring showed that dissolved hydrocarbon concentrations were all below cleanup target levels.
Sun West Limestone Mine Arsenic Assessment and Remediation
Confirmatory samples from bottom of waste oil spill excavation contained arsenic above soil cleanup target levels, which triggered the need for arsenic assessment. Assessment involved the installation of 74 soil borings and 32 monitor wells, including vertical delineation wells, and the collection and analysis of soil, sediment, groundwater and surface water samples. Arsenic plumes fully delineated in all media. Based on arsenic distribution and chemical trends, arsenic demonstrated to be naturally occurring and associated with marl layer between surface sand and top of limestone that was disturbed and redistributed by mining activity. Prepared remedial action plan that calls for placement of impacted soil below pavement planned for county park and boat ramp.