Pinnacle Engineering provided project management, regulatory reporting, and corrective action services at a Superfund Barrel and Drum Site located in the state of New York. The corrective action area occupies approximately two acres of an eight-acre parcel that was used as a salvage yard for heavy construction equipment. In 1982, two drum disposal locations were discovered at the property site; approximately 200 drums of solid and liquid chemical wastes had been abandoned at three locations on the site without any spill control or containment provisions. Heavily wooded areas and farmland border the site; neighboring properties, including residential areas, are located approximately two miles from the site. Due to the nature of the buried drums and the condition of the disposal areas, there was significant concern with drinking water wells situated within one mile of the site, which were used by approximately 20 residents.
The U.S. Environmental Agency (EPA) issued immediate corrective action orders to the property owner, who fled the property and abandoned all responsibility for the environmental conditions. The EPA then took control of this orphan site with assistance from the New York State Department of Environmental Conservation (NYSDEC). Shortly after the site investigation was complete, the EPA issued a Record of Decision calling for, among other things, extraction and treatment of the contaminated groundwater in two areas of the site, recharge of the treated groundwater to the soil to enhance the flushing of the contamination in the soil into the groundwater (i.e., in-situ soil flushing), and further evaluation of the concentrations of inorganic constituents in the surface soil in a third area of the site to determine whether levels of concern are present.
Pinnacle successfully assisted the client in implementing remedial strategies to address groundwater and soil that contained elevated concentrations of chlorinated solvents. After performing emergency container removal actions, remedial tasks included the construction and startup of a groundwater recovery and treatment system and soil flushing system (including the installation of three groundwater pumping wells), preparation of Quality Assurance Project Plans, SAPs, a Remedial Action Work Plan, and a Remedial Investigation/Feasibility Study, and securing discharge permits from the EPA and the NYSDEC.
The final remediation system consisted of the phased installation and operation of three groundwater pumping wells, a groundwater treatment system, infiltration gallery, in-situ soil flushing, and an enhanced reductive dechlorination (ERD) in-situ bioremediation program. The ERD injection program to-date consisted of the September 2007 Phase I injection followed by seventeen groundwater sampling events, and the October\November 2009 Phase II injection followed by nine groundwater sampling events. The Phase I injection program injected emulsified vegetable oil (EVO) into three (3) wells, with the Phase II injection program injecting EVO and nano-scale zero valent iron (nZVI) into various temporary borings and wells across the Site. The Phase I and Phase II injection programs were successful in reducing VOC impacted groundwater to near NYSDEC groundwater quality standards.