Source Removals
Earth Systems is an advocate of using source removal as a primary means of remedial action. When properly implemented, source removal quickly and cost effectively reduces contaminant mass levels. All of the excavations successfully reduced dissolved hydrocarbon levels to below NA Monitoring levels, and most of the source removals resulted in approval of a No Further Action status.
Earth Systems has implemented hundreds of source removal excavations at former petro-chemical terminals, active fuel terminals, bulk fuel pipeline locations, active and closed under-ground storage tank facilities, and hazardous waste sites.
Dwain's Grocery
Cypress, Florida
The Dwain's Grocery site in Cypress, Florida had an unusually deep soil plume and feasibility studies indicated source removal was the appropriate cleanup alternative. Earth Systems designed a plan for excavation with Large Diameter Auger (LDA) techniques. The LDA method uses a 5-foot diameter auger to excavate a slightly overlapping series of holes to a target depth. A total of 3,292 tons of contaminated soil were removed by the auger and transported off site for treatment and disposal. The holes produced during the LDA excavation were backfilled with an engineered slurry / flowable fill material to ensure the integrity of the area following the source removal. Calcium Oxyhydroxide was mixed with the flowable fill to accelerate the rate of naturally occurring aerobic bacterial degradation. A chemical oxidizer was also mixed with the fill to destroy contaminants in the soil and groundwater.