AS/SVE with In Situ Oxidation

Details:
Altamont assisted Chemcraft International, Inc. (Chemcraft) with assessment and remediation of their Winston-Salem, North Carolina facility.  Altamont sampled monitoring wells and prepared summary reports for submission to the North Carolina Department of Environment and Natural Resources (DENR).  When first retained, Altamont assumed the operation and maintenance of an interim air sparging and soil vapor extraction (AS/SVE) system. The interim AS/SVE system was reducing groundwater contaminant concentrations, but the air sparging network did not address the full extent of the contamination.  To address soil and groundwater contamination outside the zone of influence of the interim AS/SVE system, Altamont completed addtional site characterization and developed a Corrective Action Plan. The Corrective Action Plan recommended soil excavation and the expansion of the existing AS/SVE system with the potential for in situ chemical oxidation. The recommendations in the Corrective Action Plan were approved by the DENR.  Altamont implemented the soil excavation and AS/SVE system expansion. Altamont recognized that AS/SVE alone would likely never reduce concentrations in groundwater below remediation goals. Therefore, the system was desinged to allow for the introduction of a chemical oxidant, sodium persulfate, into the satuarted subsurface through the air sparging point network.

Altamont provided services to this client for five years.  When Chemcraft operations were sold, Altamont facilitated the transfer of system operations to the new corporate representative.  Several contaminants with varying environmental fate and transport properties were identified during the soil and groundwater assessment at the Chemcraft facility. Given the variability of the contaminant properties, identifying the right combination of remedial technologies was critical to completion of a successful Corrective Action Plan.

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