E&LP designed in implemented an innovated combination of enhanced bio-remediation techniques that significantly expedite the site closure process at a former Dry Cleaner in Spring Lake New Jersey. In a multi-layer aquifer that contains Atlantic Coastal Plain sands and clay lenses, tetrachloroethene (PCE) and limited daughter products have extended a mile from the former source area toward the boundary with the Atlantic Ocean.
The three (3) component treatment train consisted of the combined use of a novel In Situ Bio-Reactors (ISBRs) combined PlumeStop® Liquid Activated Carbon™ and electron donor to promote reductive dechlorination of PCE to non-detect in sand and clay layers of this aquifer that extended to 60 feet below ground surface.
Long, diffuse chlorinated solvent plumes are classified as recalcitrant compounds because biodegradation can stall or be slow to completely dechlorinate contaminants to ethene. These compounds persisted at high levels for fifteen (15) years since their discovery in 2000. E&LP used their expertise in enhanced bio-remediation to develop an innovated plan to rapidly decrease the levels of chlorinated solvents in this multi-layered, complex geological setting. Non-detect levels we achieved within the first year for the shallow and intermediate aquifers. Regulatory compliance and case closure was achieved in less than two years, after the deep aquifer was remediated from 627 ug/l to non-detect.
Overall, the results conclusively demonstrated combined use of sustained bio-augmentation via the bio-reactors combined with electron donor and Plume Stop injections can rapidly reduce the duration of these bio-degradation processes.
Key Project Information
Client: 1308 Assoc.
Date: July 2015 – Present
Location: Spring Lake, New Jersey