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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Backgrc:aJn:l o:r.oentratia1S: '!he backgrc:aJn:l Q) CX1OOE!l1t.rations are values <br />d::Jt:ained !ran on-site CD IIDl'litorirg done by Interpoll, loc. fran <br />Noverrber 8 t:hraJ:;Jh NcJveni:)er 22, 1985. 'Ihe backgrc:urrl emissions are <br />presented in Table 3. <br /> <br />TABlE 3 <br />1995 CARB:::N M:NOXIIE VAIlJES <br /> <br />Parts per Million (PIM) <br /> <br />Monitored 11/15/85 <br />Mobile 3 Adj~LnH1t(0.675) <br />Correction for Traffic Grcwth(1.16) <br /> <br />one-ha.1r <br />4.9 <br />3.3 <br />3.8 <br /> <br />Eight-hour <br />4.5 <br />3.0 <br />3.5 <br /> <br />4. site O1aracteristics <br /> <br />Surface Roughness: The surface roughness value used was 175 <br />centimeters, which corresponds to a suburban office building <br />environment. 'lhis value provides a OJnSeIVative estimate of surface <br />~. <br /> <br />Receptor I.ocation: Five receptors ~ analyzed. Receptors #1 an:l #2 <br />'Mere located on sirgle family residelD:!s. Receptor #1 was located an <br />the residence closest to the inters~ction of County Road D and <br />Clevelan:l Avern.le. Receptor #2 was located on the residence closest to <br />entrarx;,e 1 an Clevelan:l Avenue. Receptors #3 an:l #4 were located an <br />prcp>sed office tW.lclin;Js an the site. Receptor #3 is the buildirg <br />closest to errt:ran:1e 2 on Clevelan:l Avern.le. Receptor #4 is the buildi.n;J <br />closest to the intersection of County Road C2 (entrance 3) and <br />Clevelan:l Avenue. Receptor #5 was a IICItor freight buildi.rg across <br />fran the 1-35W raI1'p terminal an:l east of Clevelan:l. Figure 4 shows the <br />location of these receptors. '!he receptors are all located 1.5 meters <br />(five feet) above grade. <br /> <br />DIpacts <br /> <br />'!he highest eight-ha.1r CD CX1OOE!l1t.ration projected would occur at Receptor <br />#5. 'lhis resultirg CD CX1OOE!l1t.ration represents 76 percent of the eight-hour <br />st:.an:1ard. '!he highest me-hour CD CX1OOE!l1t.ratian projecta:l would also occur <br />at Receptor 1. 'Ibis resultirg CD CXJl"n:!lItra.tion represents 53 percent of the <br />me-hour st..arrlard. Table 4 SlIlIIIl'Iarizes the highest oorx::entrations for each <br />receptor. '!he emission rate calculations (CDERP) an:l the dispersion <br />IOOdelin;J (CALINE 3) cutpIt are presented in ~ C. <br /> <br />13 <br />