HCR currently serves as a Prime Contractor for the Department of Environmental Protection Subsurface Remedial Action Services Term Contract. Services we provide under this contract include emergency and non-emergency design and construction of environmental remediation and mitigation systems for indoor air contamination and subsurface contamination in both soils and groundwater.
The cases under this contract are often categorized as Immediate Environmental Concerns (IECs) or emergency cases. Our personnel complete rapid site investigations and then use the information in order to expeditiously and cost effectively design treatment systems to address the concerns. Treatment and mitigation systems installed under this contract include pump and treat water systems, soil vapor extraction systems, soil vapor extraction with sparge air systems and sub-slab treatment or depressurization systems. As of 2012, we have provided subsurface remedial action services at 32 of this state's DEP sites, located statewide. Recent projects under this contract have included:
We were actively involved in the design, construction and optimization of an acid gas scrubber system for the removal and treatment of hydrogen sulfide gas, as well as other landfill gases. The primary goal of this system is to prevent any off-site migration of H2S gas, and the system currently operates 24/7. Current average flow into the system is 3,000 SCFM. To date, this system has cumulatively recovered more than 2,000,000 pounds of H2S gas, and current loading rates are approximately 200 pounds of gas per hour. Field personnel review operations daily and make adjustments or modifications to maximize recovery rates and/or reduce any safety concerns.
We installed three vapor mitigation systems in three single family residential dwellings situated above a groundwater plume contaminated with PCE from an unknown source. We then evaluated the three vapor mitigation systems, monitoring sub-slab vacuum influence and indoor air quality. After installation of these systems, two of three homes did not meet vacuum communication air standards. We used soil, air and groundwater sampling results to design and install groundwater and soil vapor extraction systems. These systems use a combination of four recovery wells, basement sub-slab extraction points and horizontal vapor extraction screens. These extraction systems were successful in maintaining sub-slab vacuum communication above standards and lowered the indoor air contamination to below standards.
Perflourononanoic Acid (PFNA), used by an industrial facility near a residential community, contaminated nearby groundwater, surface water and potable wells. We were engaged to furnish all the labor, equipment and materials necessary to install 20 residential Point of Entry Treatment (POET) systems. As part of the engagement, we also hooked up XX residences to public water. The POET systems include water softeners for removal of iron and hardness. Groundwater contamination was improved to far below standards. We provide bottled water service to residences and performs operation and maintenance of these systems through the current DEP Operations and Maintenance Contract.
The first step to completing any project is getting started. Request a free consultation today with one of our specialists to help evaluate your environmental needs, have any of your questions answered and get on the path to identifying an appropriate solution.
