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?y-■■ ■' <br />Sliilph% <br />m <br />?- ^ <br />n-- <br />;f <br />^?VrS <br />f <br />iji " - ":, <br />I <br />?^- <br />•ii-^ <br />W' .. <br />r? <br />% <br />K’' <br />^?i'- <br />J< <br />92-47.08 <br />from paving the road with either of the considered roadway <br />materials are similar. <br />Table 1 summarizes the Total Suspended Particulates (TSP) <br />and Respirable Particulate (PM,o) concentration estimates from <br />botii paved and unpaved roads. It can be seen from the data <br />provided in this table that concentrations from unpaved surfaces <br />are about 30 times greater than those produced from paved <br />surfaces. Also, the TSP con^^entrations are about 3 times greater <br />than the respective PM^ concentrations, and concentrations at a <br />distance of 10 meters from the road are about 8 times greater <br />than at a distance of lOO meters from the road. <br />Table 2 summarizes the results of the deposition <br />calculations. It can be seen from the data provided in this <br />table that deposition resulting from unpaved surfaces is about <br />30 times greater than deposition from paved surfaces. Also, TSP <br />deposition is about 20 times greater than PM,q deposition due to <br />the higher settling velocity. Finally, deposition amounts at <br />10 meters are about 9 times greater than at 100 meters for TSP <br />and about 7 times greater than at 100 meters for PMjq. <br />Table 3 summarizes the total carcinogenic and <br />noncarcinogenic health risks to infants, children, and adults <br />resulting from inhalation, ingestion, r.ermal contact, and <br />consumption of foods raised and grown near the demonstration <br />project respective for the three considered scenarios (nonpaved <br />road, or road paved with the two considered road materials). <br />The data provided in Table 3 clearly demonstrate that none <br />of the noncarcinogenic hazard quotations exceed the U.S. EPA <br />goal, for any of the considered scenarios, and that the potential <br />carcinogenic risk was well below the U.S. EPA acceptable range of <br />10“* to lO""' excess cancer risks. <br />The effects of the three roadway materials potential impact <br />on the local aquatic ecology was assessed by comparing total <br />water concentrations due to air-deposited and surface water <br />runoff contaminant contributions to applicable water quality <br />criteria. Again, the TAP containing paved source contributions <br />are .less than all applicable criteria. <br />Food chain products grown or raised within 10 meters (less <br />than 33 feet) from the road were found to not contain any of the <br />metals of concern in concentration which exceed naturally <br />occurring levels. <br />13