U.S. EPA Contaminated Site Cleanup Information (CLU-IN)


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FIRST FIVE-YEAR REVIEW REPORT FOR BRESLUBE-PENN, INC. SUPERFUND SITE ALLEGHENY COUNTY, PENNSYLVANIA
U.S. EPA Region 3, Philadelphia, PA. 69 pp, 2019

The site encompasses the former Breslube-Penn facility, a level 7-acre tract of land used by different entities for used oil processing and reclamation (1977-1986) and then as a used oil transfer station (1987-1992). The site soil is contaminated with metals, VOCs, and PCBs, and the groundwater is affected by a wide range of chlorinated and non-chlorinated VOCs and metals. For OU1, extensive excavation and removal of contaminated soils and installation of the groundwater pump-and-treat system, slurry wall, and cap was completed by 2015, along with removal of the existing wetlands on the Waste Management Area (WMA) and construction of compensatory wetlands. Groundwater and LNAPL collected by French drains flow into concrete cells for treatment using activated carbon, and then are discharged into underground infiltration galleries outside the WMA. For OU2 (groundwater outside the WMA), the remedial design phase is underway. In September and October 2015, PRP contractors conducted the first in situ groundwater treatment injections as part of an extended pilot study to confirm the effectiveness of in situ treatment. For the shallow unconsolidated aquifer, in situ enhanced biodegradation was conducted by injecting emulsified vegetable oil (to serve as a carbon source for microbes) and nutrients into wells along the southeastern border of the WMA. Additional nutrient injections were conducted on a quarterly basis through the fall of 2017 as needed based on nutrient monitoring data. Additional emulsified vegetable oil and nutrients were injected in April 2018. For the shallow bedrock aquifer, in situ chemical oxidation (ISCO) was conducted from 2015 through 2017 by injecting sodium hydroxide and sodium persulfate into wells outside the WMA along its southeastern and northern borders. When the 2-year pilot study data indicated that ISCO had been effective in reducing VOC concentrations and that biodegradation of VOCs was occurring in areas not affected by the oxidant, contractors conducted additional bioremediation injections in April 2018 into the shallow bedrock aquifer. Upon completion of this pilot study, an enhanced bioattenuation plan will be submitted to EPA for approval. https://semspub.epa.gov/src/document/03/2275291



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