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HSW Engineering
Green Initiative
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HSW Green Initiative

Site Restoration and Environmental Compliance

“After an exhaustive review, the Committee selected HSW to represent us in our dealings with regulatory agencies and in developing our white papers.   The Committee could not have been more pleased with our selection of HSW.   They provided valuable and insightful input concerning potential streamlining opportunities as well as authoring the white papers that were so well received by our targeted regulatory community.” ~Private Aerospace Company    

HSW's work at this facility involved on site restoration and environmental compliance utilizing innovative/sophisticated strategies in site assessment and regulatory negotiation. HSW has been responsible for assisting the client in their regulatory compliance activities under RCRA, UIC, NPDES, and industrial wastewater treatment and discharge to the local POTW. The client continues to retain HSW at this and other facilities in other states, in a large part due to our innovative, streamlined approaches that have resulted in cost avoidance for the Georgia facility exceeding $500,000. The cost avoidance/streamlining measures included: negotiating a flexible Consent Agreement rather than a prescriptive RCRA permit or order; consolidating SWMUs for investigation/applying corrective measures; minimizing the generation, characterization, and disposal of IDW; applying the source of contamination presumption for managing contaminated media; identifying an upgradient source of contamination, and continually reviewing and introducing cost avoidance measures under the ongoing water quality monitoring program.

HSW assessed levels of contamination in soil, surface water, groundwater, and sediment.  Human health and ecological risk assessments and hydrologic modeling played important roles in HSW’s development and ranking of remedial options, particularly for sediment and surface water.  Bench scale testing of two technologies (in-situ chemical oxidation and enhanced in-situ bioremediation) resulted in the implementation of a field bioaugmentation pilot study to reduce VOC concentrations in a suspected source area for groundwater contamination.  The concentrations of PCE, TCE, and cis-1,2-DCE were reduced by over 97% within the pilot test area within a 16 month period.  Groundwater flow and contaminant fate and transport modeling was used to assist with the design of the bioaugmentation pilot study, predict residual plume migration, and quantify fugitive plume migration onto the site from another facility.