Risk-based remedial goals

Regulatory factors Risk-based remedial goals... 

The MCL for TCE (5 pg/L) has been determined to be a relevant and appropriate remediation level for the contaminated groundwater at this site because the groundwater is used as a source for drinking water. Based on the site-specific risk assessment, the MCL has been determined to be sufficiently protective as the aquifer remediation goal. 

Required final constituent concentration, as defined by remediation action goals, or those determined on a site-specific basis using transport models along with risk-based calculations. 

RBCA and the use of risk-based decision-making to establish health-protective remedial measures and controls at a site is a process that is producing health-protective and cost-effective corrective action sites. RBCA is used to decide the level of corrective action necessary at a site to protect human health and the environment, site-specific remediation goals (RBSLs or SSTLs), and the concentrations of constituents that can remain at the site because they will not impact human health and the environment. For sites already undergoing remediation, the RBSLs or SSTLs can be used to determine when the site no longer poses a threat to human health and the environment. Therefore, RBCA is useful both for newly discovered releases as well as for old releases that may have treatment systems with constituent concentrations reaching asymptotic levels. 

EPA Risk Assessment Guidance for Superfund Volume 1 Human Health Evaluation Manual (Part B, Development of Risk-Based Preliminary Remediation Goals. (1991a). Publication 9285.7-OlB. Washington, DC Office of Emergency and Remedial Response, NTIS PB92-963333. 

The EPA-recommended remedial goal for benzo(a)pyrene was 0.1 mg/kg at Cape Canaveral Air Force Station in Florida and at the Joliet Arsenal in Illinois. A cleanup goal of 0.1 mg/kg was recommended for benzo(a) pyrene based on cancer risk. 

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