Recovery of Free Petroleum Product at Fort Drum, Fuel Dispensing Area 1595, Watertown, New York

Site Name:

Fort Drum


Watertown, New York

Period of

Status: Ongoing
Report covers - 2/92 to 4/94


Full-scale cleanup (interim results)


Not Available

Groundwater Extraction followed by Air Stripping and Granular Activated Carbon - 2 recovery wells - approximately 25 ft. below ground surface; average rate of 5-6 gpm - Oil/water separator - 575 gallon capacity - Air stripper - 750 cfm - GAC - 4 55-gallon steel drums; 200 lb GAC per drum; operated 2 in series

Cleanup Authority:

SIC Code:
9711 (National Security)
Point of Contact:
Remedial Project Manager
Fort Drum
Environmental Division
Watertown, NY

Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX) - Gasoline and #2 fuel oil - Free product measured in two wells in 1990 and 1994 - Full extent of contamination not yet defined

Waste Source:
Underground Storage Tank

Type/Quantity of Media Treated:
Groundwater and Free Product - Hydraulic conductivity of aquifer 0.11 to 0.0012 cm/sec - Transmissivity 11,787 to 32,518 using Jacob method

Purpose/Significance of Application:
Full-scale remediation to recover free-phase petroleum product using groundwater extraction and air stripping and granular activated carbon (GAC).

Regulatory Requirements/Cleanup Goals:
- Final cleanup criteria have not been established at this time; the project is being conducted as a Rapid Response Interim Remediation - Treated water discharged to the POTW must meet the following criteria - benzene (3 ~g/L), toluene (35 ~g/L), xylenes (190 ~g/L), ethylbenzene (8 ~g/L)

- Information on the total quantity of free product recovered is not available at this time - The effluent from the treatment system met all discharge criteria

Cost Factors:
- Total Capital Costs - $958,780 (including system design and construction including site work, equipment, and mobilization/demobilization) - Total Annual Operating Costs - $129,440 (including carbon changeout/regeneration, maintenance, laboratory analysis, and project management) - An estimated cost for completion of the cleanup is not available at this time

Fort Drum in Watertown, New York, established in 1906, serves as a combat skills training area and operations headquarters for light infantry troops.

Motor vehicle and aircraft refueling activities are conducted in Area 1595 of the facility. Area 1595 includes an underground storage tank (UST) and 10 dispensing units for gasoline, diesel fuel, and jet fuel. In 1982, free petroleum product was observed in a spring near this area. Suspected contaminant sources include leaking USTs and wastewaters from vehicle washing operations located adjacent to Area 1595. The primary contaminants of concern are BTEX (benzene, toluene, ethylbenzene, and xylenes) and free petroleum product. The full extent of the contamination had not been defined at the time of this report. The site remediation is being performed as a Rapid Response Interim Remediation and final cleanup criteria have not been established at this time.

A pump and treat recovery, consisting of two recovery wells, an oil/water separator, an air stripper, and granular activated carbon vessels, was operated from March 1992 to mid-1993. The system was restarted in February 1994 and was operational at the time of this report. The first year of operation focused on troubleshooting and little data were collected during that time. As such, no information is available at this time on the total quantity of free product recovered or the rate of recovery. Data from the air stripper/GAC system indicated that the concentrations of contaminants in the effluent meet the POTW discharge criteria for BTEX. An air emissions certificate was issued by the State in October 1992; however, information on specific emission limits was not available at the time of this report.

The total capital costs for this remediation are $958,780 and the estimated total annual operating costs are $129,440. Based on operations to date, it has been observed that free product recovery pumps require frequent maintenance and that activated carbon efficiency was limited because of fouling by iron and biomass.