Santa Maria Integrated Waste Management Facility Health Risk Assessment

Rincon Consultants prepared an Environmental Impact Report for a Class III landfill to be developed by the City of Santa Maria.  In support of this EIR, Rincon prepared a technical Health Risk Assessment to determine the potential for possible carcinogenic, chronic, and acute health effects associated with hazardous air pollutants that are contained within landfill gas (LFG) emissions and diesel exhaust particulate emissions from garbage trucks and other off-road mobile equipment on nearby sensitive uses.  The LFG emissions examined include 31 hazardous air pollutants in addition to criteria air pollutants.  The analysis also examined six vehicle exhaust pollutants of concern:  diesel particulate matter, acrolein, acetaldehyde, formaldehyde, benzene, and 1,3-butadiene.  Rincon employed the ISC3 dispersion model embedded in the CARB Hotspots Analysis and Reporting Program (HARP) to estimate ground level concentrations that were input into a spreadsheet program that employed standardized health risk equations and methodologies based on the USEPA Human Health Evaluation Manual (1991). 

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