04_AECOM_Environmental Report_Final

Memo Wonder Group, Inc. Expansion Additional details on the modeling methodology and results have been provided in the modeling report in Appendix B. Applicable Air Quality Thresholds Federal Air Quality Standards The Clean Air Act of 1970 required the USEPA to establish ambient concentration thresholds for certain compounds based upon the identifiable effects that the compounds may have on public health and welfare. Subsequently, the USEPA promulgated regulations that set National Ambient Air Quality Standards (NAAQS) for several criteria compaunds, including particulate matter. Note that a NAAQS has not been established for PAH, and therefore this NAAQS analysis only focuses on PM emissions. For the purposes of this analysis, all stack-tested PM emissions were assumed to be particulate matter with an aerodynamic diameter of less than 2.5 microns (PMz5s), which can be considered conservative, since PM2s is a subset of tatal PM, and therefore assuming PM25 equals total PM tends to averestimate the actual PMas emissions. The currently applicable PMz.s NAAQS and comparison to the modeled concentrations are detailed in the Results section below. New Jersey Health Risk Toxicity Values NJDEP provides guidelines for evaluating potential inhalation-based health risks far sources of HAPs. The guidelines recommend calculations of cancer and non-cancer risk be based on pollutant-specific toxicity values. Non-cancer risk encompasses potential harmful effects from exposure to pollutants such as neurodevelopmental, respiratory, cardiovascular and other health impacts. NJDEP provides toxicity values in the form of a unit risk factor (URF) or a reference concentration (RfC), for cancer and non-cancer risk, respectively. The URF is multiplied by the annual air concentration from AERMOD {ug/m?) to establish a cancer risk. For pollutants for which NJDEP has not provided a RfC, one was developed using an extrapolation of available oral dase values which have been established to estimate risks associated with oral {ingestion) exposure fram pollutants. The methodology used to extrapolate out a RFC to assess inhalation-related risks followed published guidelines by the USEPA’. A first-level risk screening has been established by NJDEP, and is designed to evaluate a calculated risk below the “negligible” threshold which is defined as cancer risk less than ar equal to one in

A first-level risk screening has been established by NJDEP, and is designed to evaluate a calculated risk below the “negligible” threshold which is defined as cancer risk less than ar equal to one in a million (i.e. na more than ane person out of a population of one million exposed to the same level of a chemical contaminant would develop cancer due to that exposure) and a hazard quotient of less than or equal to one (i.e. less than or equal to the RfG) for non-cancer risk‘ for a facility-wide assessment. Cancer risk is based on long-term (annual) modeled concentrations and non-cancer hazard quotients are based on long-term and/or short-term modeled concentrations, depending on the pollutant Since PAHS are a class of numerous compounds, the individual pollutants which encompass PAHs were evaluated using their individual toxicity factors. The applicable toxicity factors far PAH constituents and comparison to the modeled concentrations are detailed in the Results section below. Results Asummary of the NAAQS analysis is presented below in Table 2. The modeled concentrations presented represent the estimated downwind concentrations as a result of emissions from the twelve wood-fired smokers. The modeled concentrations were then added to the representative arnbient background concentrations to estimate the total concentrations for comparison to the NAAQS. As shown, the total concentrations for 24-hour S USEPA 2005. Human Health Risk Assessment Protocol for Hazardous Waste Combustion Facilities, Final, EPA520-R-05-006. Office of Waste-Hazardous Waste ~ Treatment & Disposal. September. 4 NUDEP 2018. Technical Manual 1008. Guidance on Preparing o Risk Assessment for Alr Contaminant Emissions, Tables 2-3 & 2-4. New Jersey Department of Environmental Protection. Division of Air Quality. AECOM ed