The Atlantic Division of the US Naval Facilities Engineering Command, in conjunction with the Yorktown Naval Weapons Station (WPNSTN) initiated the multi-batch, full-scale bioremediation of soil impacted with organic explosive compounds (OE) at the WPNSTN.
Yorktown, Virginia
TNT, RDX
Daramend® reagent was applied ex situ to soil in a covered treatment cell containing approximately 1,200 yd3 per batch. Small quantities of Daramend were then applied in situ to additional impacted soil using excavation equipment.
The ex situ treatment resulted in TNT concentration reduced from 10,000 mg/kg to less than 15 mg/kg and RDX concentration reduced from 210 mg/k to 4 mg/k during treatment of the first batch and 255 mg/kg to 1 mg/kg during the second batch. The in situ treatment resulted in TNT concentration reduced from 10,884 mg/kg to 200 mg/kg and in RDX concentration reduced from 400 mg/kg to 1 mg/kg.
With a total treatment time of 3 months, the application of Daramend reagent reduced concentrations of PCE and TCE below the remedial standards at this site in the northwest USA.
Daramend® was applied first to a two-acre pilot project, and then to an additional 32 acres. The treatment successfully destroyed the concentrations of organochlorinated contaminants on time and on budget.
Daramend® reagent was the selected technology at a site for the treatment of 350 tons of soil impacted by phenoxy-acid herbicides (2,4-D, and 2,4,5-T), and other chlorinated pesticides (DDT, DDD, and DDE).
With nine years of data Daramend® addressed long-term mitigation of vapor pathway concerns over exposed areas containing concentrations of dissolved VOCs.
A 2,600-ton in situ pilot was conducted at a site in Florida using Daramend® Reagent achieving remedial goals within 3 weeks.
