Risk Evaluation Eliminating Naturally Occurring Constituent
A risk assessment was completed for a metal electro plating manufacturing facility in Pennsylvania under Act 2. Constituents analyzed for included volatile organic compounds, semi-volatiles organic compounds, and metals. An analysis of the analytical data was completed to determine constituents of interest (COI) that exceeded applicable screening criteria and would be carried through the quantitative risk assessment. Arsenic was detected in soil and groundwater at concentrations that exceeded applicable screening criteria. However, upon a thorough evaluation of historic site activities, hydrogeologic conditions, analytical trend analyses, and reference to publications on background arsenic soil concentrations, it was determined that although arsenic exceeded screening criteria in site samples, the presence and concentrations of arsenic in site media indicate that arsenic is naturally occurring. Therefore, a definitive argument was made for excluding arsenic in the quantitative risk assessment that was supported by a multiple-lines-of-evidence approach.
Risk Evaluation of Discharge to Surface Water
Risk Evaluation of Change in Property Use
Property Redevelopment Risk Assessment
Utility Right-of-Way Risk Assessment
Risk Evaluation Eliminating Naturally Occurring Constituent
Cost-Effective Risk Assessment of Multiple Off-Site Receptors
Target Organ Hazard Index Analysis
Vapor Intrusion Risk Assessment for Varying Subsurface Condition Scenarios
Residual Risk Assessment with Remedial Goals