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<br />Plant 13509 Emergency Generator Analysis <br /> <br />DPM Cancer Risk From Diesel Emergency Generator <br />BAAQMD Plant #13509 - AT&T Generator <br />DPM Emission Rates <br />Annual DPM Emissions <br />Operation Daily*Annual <br />Source Type (hr)(lb/day)(lb/yr) <br />Generator -0.0787 28.73 <br />* From BAAQMD permit inventory <br />Modeling Information <br />Model:ISCST3 <br />Source Generators <br />Source Type Point <br />Distance to Residences (ft)various - minimum distance to generator = 450 feet <br />Receptor Height (m)1.5 meters (1st floor) and 6.0 m (2nd floor) <br />Meteorological Data 2001-2005 BAAQMD San Carlos Airport data <br />Point Source Stack Parameters <br />Generator engine size (hp)unknown <br />Stack Height (ft)50 <br />Stack Diameter** (ft)0.83 <br />Stack Exit Velocity** (ft/sec)279 <br />Exhaust Temperature** (F)975 <br />Annual Emission Rate (lb/year)28.73 from BAAQMD inventory data <br />Hourly Emission Rate (lb/hr)***8.74E-03 <br />Building Dimensions <br />Building Height ( ft)45 <br />Building Length (ft)195 <br />Building Width 140 <br />** Stack parameters for Caterpillar 3512A engine-generator <br />*** Hourly emission rate based on annual emissions and 3,285 hours per year (daytime operation between 8 am - 5 pm). <br />8.A. - Page 115