GZA provided engineering, construction and site remediation work for the Defense Energy Support Center (DESC - Department of Defense) in connection with the closure of four former fuel supply depots. Having successfully completed over 150 remedial task orders, GZA has assisted DESC in the closure of these facilities allowing the properties to be released to the local communities for redevelopment.

The Defense Fuel Support Point (DFSP) facility in Newington, NH included a marine pier, 15-acre bulk fuel storage terminal with six underground storage tanks (USTs) having a combined capacity of 15.4 million gallons, and a 3‑mile‑long pipeline. The DFSP facility in Melville, RI included a main fuel terminal area and three remote underground tank farms. The facility held 38 storage tanks with a total storage capacity of 54.6 million gallons. The Searsport, ME facility included a marine fuel pier, 52‑acre bulk fuel storage terminal with nine aboveground storage tanks (ASTs) with a total combined capacity of 37.8 million gallons. The Harpswell, ME facility consisted of a marine fuel pier, 67‑acre bulk fuel storage terminal with 14 ASTs having a total combined capacity of 39.5 million gallons. 

The following remedial activities were completed:

Design, fabrication, installation, start‑up and operation of a dewatering and soil vapor extraction (SVE) system for the multi-phase recovery of aviation gas/JP-4 fuel;

Laboratory bio-treatability studies to evaluate the feasibility of remediating hydrocarbon contamination and to support natural attenuation of contaminants;

Dismantling/demolition of 14 ASTs with a total combined capacity of 39.5 million gallons, fuel pump houses, pipeline extending over a length of 4 miles, cleaning and decommissioning of 12 miles of buried pipeline;

Abatement of asbestos and lead-containing materials.

Installation, operation, maintenance, and monitoring of product recovery and treatment systems;

On-site recycling of over 9,000 tons of waste oil contaminated soils using asphalt emulsion, cold‑mix asphalt batching techniques resulting in the beneficial reuse of the end product as the on-site road base course;

On-site treatment of approximately 54,000 tons of petroleum hydrocarbon‑contaminated soils using low temperature thermal desorption technology;

Off-site transportation and disposal of 13,000 tons of gasoline/jet fuel impacted soil using low temperature thermal desorption and rotary kiln thermal treatment; and

Management of over 500,000 gallons of oils, sludges, and petroleum products generated during the remedial construction.