25 Pa. Code § 250.602 - Risk assessment procedures
(a) Except as specified in §
250.405 (relating to when to
perform a risk assessment), a person shall perform a risk assessment when using
a site-specific standard under Subchapter D (relating to site-specific
standards) to determine if there are unacceptable exposures to humans or
unacceptable exposures to ecological receptors, or both.
(b) A person who proposes to perform a risk
assessment under the site-specific standard shall use the methodologies used to
develop the Statewide health standards contained in Subchapter C (relating to
Statewide health standards) to conduct the risk assessment. If methodologies
are not specified in Subchapter C or this subchapter, the risk assessment shall
be conducted in accordance with the methodology specified in EPA or ASTM
guidelines approved by the Department.
(c) A risk assessment for human exposure
shall include the following components:
(1)
Data collection, including source characterization and development of a
conceptual site model, and evaluation to identify contaminants of
concern.
(2) Exposure assessment
that considers ingestion, inhalation and volatilization pathways and exposure
assumptions based on land use.
(3)
Toxicity assessment that includes the use of toxicity information from sources
identified in §
250.605 (relating to sources of
toxicity information).
(4) Risk
characterization that evaluates if the risks meet the human health protection
goals and ecological receptor protection specified in §
250.402 (relating to human health
and environmental protection goals).
(d) An exposure assessment that is based on
sampling shall use a data handling methodology that is consistent with the
statistical method used to demonstrate attainment.
(e) When performing an exposure assessment, a
person shall use the appropriate exposure factors identified in §
250.603 (relating to exposure
factors for site-specific standards) and meet the requirements of §
250.604 (relating to fate and
transport modeling requirements for exposure assessments).
(f) The risk assessment report shall discuss
the degree of uncertainty associated with the risk assessment.
Notes
This section cited in 25 Pa. Code § 250.606 (relating to development of site-specific standards).
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.