Description
W.R. Grace & Co. Dewey & Almy Chemical Division New
Jersey, USA
Project: Ex Situ Treatment of Soils Impacted with Bis
(2-ethylhexyl) phthalate
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Summary
Soil impacted with bis (2-ethylhexyl) phthalate (BEHP) was treated ex
situ in two covered land treatment cells containing approximately 450
yards of excavated soil. Concentrations of BEHP as high as 7,710 mg/kg,
were reduced by 91.1% to 99.5% following 10 months of active treatment.
The Challenge
An estimated 450 yards of soil required treatment at the site. The
remedial goal for BEHP was 49 mg/kg. To reach this goal, removal
efficiencies of over 91% had to be achieved.
The Solution
DARAMEND® was applied ex situ on two 225 yard treatment cells
impacted with BEHP. DARAMEND was applied to the soil surface and
incorporated to a depth of 2 feet with a specialized deep rotary tiller.
Tilling also served to aerate and homogenize the soil. Standard
agricultural irrigation equipment was used to apply water, when required,
to maintain the soil moisture content at about 40% of the soil water
holding capacity.
The Result
DARAMEND bioremediation technology supported efficient removal of all
target compounds in soil at the site to levels below the target criteria
of 49 mg/kg for each of the two treatment cells.
Treatment Cell 1 BEHP concentrations were reduced by 91.1% and ranged
from 15 to 26 mg/kg following treatment.
Treatment Cell 2 BEHP concentrations were reduced by 95.5% and ranged
from <3.7 to 15 mg/kg, following treatment.
The Timeline
Treatment was completed over a period of 10 months in 1996.
Companies On This Project
ADVENTUS GROUP
