Contamination Assessment
Former County Fleet Maintenance Facility

Scope of Work: Contamination assessment of a former fleet maintenance facility that featured underground storage tanks, vehicle maintenance garage, pesticide storage area, asphalt emulsion storage tanks, and paint marking equipment storage and maintenance areas. The site is located on 5-acres near a residential area. Contaminants of concern include petroleum hydrocarbons, solvents, pesticides, and heavy metals. Affected media include perched zone and Floridan aquifer groundwater, soil, and sediment. Work to date includes completion of more than 400 soil borings using a combination direct-push technology (DPT), hollow-stem auger/split spoon, sonic coring, and hand auger methods; installation of 96 monitoring wells, including 18 vertical delineation wells; collection and analyses of soil and groundwater samples; and completion of 2 discrete-interval aquifer packer tests. Remedial strategies will include a mixture of active remediation to address petroleum hydrocarbon and solvent contamination; and a combination of source removal and institutional controls (i.e. deed restrictions) to address metals contamination.

Phase I &Phase II Environmental Site Assessment
Historic Florida Tourist Attraction

Scope of Work: Phase I/Phase II environmental site assessment of 300 acre parcel including and surrounding historic Florida tourist attraction. Identified multiple Recognized Environmental Conditions (RECs) including current and historic non-permitted landfills and disposal pits; above ground and underground petroleum storage tanks; maintenance areas; waste water treatment plant (WWTP) effluent disposal areas; pesticide mixing/rinsing/storage areas; and a drum storage area. Phase II efforts included installation of monitor wells and soil borings and collection and analysis of soil and groundwater samples. Remedial activities included the excavation and offsite disposal of 850 truck loads of garbage and construction and demolition (C&D) debris and the excavation and offsite disposal of stained and contaminated soil.

Petroleum Storage Tank Management
Former Grocery/Petroleum Retail Facility

Scope of Work: Remedial Action Plan and Remedial Action Construction.
Project entailed development and implementation of a remedial action plan (RAP) to address shallow soils and perched and Floridan aquifer groundwater impacted by petroleum hydrocarbons. Following approval of the RAP, the system was constructed per the design specifications. This was a difficult remediation project due to the depth to groundwater (58’) and the subsurface lithology (sands and clays). 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 (MPE), development of design drawings, solicitation of construction bids, selection of contractors, installation of air sparging and SVE wells, system installation and construction oversight, and system commissioning and start-up.

Petroleum Storage Tank Management
Former Industrial Vehicle Maintenance Facility

Scope of Work: Source removal.
Project included excavation and removal of approximately 215 tons (~153 cubic yards) of soils impacted by diesel fuel and motor oil and removal from the site for proper disposal. Other activities included collection and analysis of confirmatory soil samples, and emplacement and compaction of clean fill.