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r <br /> Bright People.Right Salutfoni <br /> Volume Source Modeling Parameters <br /> Release Height 1.8 meters (6 feet) <br /> Initial Lateral Dimension 1.7 meters (5.58 feet) <br /> Initial Vertical Dimension 0.9 meters (2.79 feet) <br /> Point Source Modeling Parameters <br /> Release Height 3.8 meters (12.6 feet) <br /> Stack Exit Temperature 366 degree Kelvin <br /> tStack Exit Velocity 51.71 meters/second <br /> Stack Diameter 0.1 meters <br /> Receptors were chosen based on where workers or residents would be located for long- <br /> term exposure scenarios using a combination of aerial photographs and site <br /> reconnaissance. The SJVAPCD modeling guidance was also used to develop an <br /> adequate receptor domain for modeling sensitive receptors necessary for assessing <br /> potential project health risk impacts. Figure 2 shows the locations of the sources and <br /> receptors used for modeling. <br /> The primary sensitive receptors were the residences located across Weber Avenue from <br /> the facility. Worker receptors were depicted as discrete receptors located at areas where <br /> businesses were identified or where workers activities could occur on a routine basis. <br /> This includes industrial offices, grocery stores, convenience stores, retail outlets, <br /> businesses, etc. No discrete receptors (i.e., hospitals, schools, churches, parks and <br /> daycare centers) were identified in the area of concern. <br /> The model was run using hourly wind data for five calendar years 2005 through 2009. <br /> The year that yielded the highest annual concentrations was 2008; thus these <br /> concentrations were used to calculate the risk results in Section 4. <br /> 121339/IRV11 Rxxx Page 5 of 7 September 15, 2011 <br /> Copyright 2011 Kleinfelder <br />