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Plywood and Composite Wood Products (PCWP)
NESHAP:
low risk-subcategory Summary
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2. Low-Risk Criteria
The US EPA may approve an affected source as eligible for
membership in the delisted low-risk subcategory of PCWP sources
if it is determine that it is low risk for both carcinogenic
and noncarcinogenic effects. To be considered low risk, the
PCWP affected source must meet the following criteria:
- The maximum off-site individual lifetime cancer risk at
a location where people live is less than one in one million
for carcinogenic chronic inhalation effects;
- Every maximum off-site target-organ specific hazard index
(TOSHI) (or, alternatively, an appropriately site-specific
set of hazard indices based on similar or complementary mechanisms
of action that are reasonably likely to be additive at low
dose or dose-response data for your affected source’s
HAP mixture) at a location where people live is less than
or equal to 1.0 for noncarcinogenic chronic inhalation effects;
and
- The maximum off-site acute hazard quotients for acrolein
and formaldehyde are less than or equal to 1.0 for noncarcinogenic
acute inhalation effects.
These criteria are built into the look-up tables included
in appendix B to the PCWP MACT rule (subpart DDDD). Facilities
conducting site-specific risk assessments must explicitly
demonstrate that they meet these criteria. Facilities need
not perform site-specific multipathway human health risk
assessments or ecological risk assessments since EPA performed
a source category-wide screening assessment which demonstrates
that these risks are insignificant for all sources.
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