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<br />L" <br />....j <br />It':I <br /> <br />..,'~"'j <br />(",.-' <br />" ; <br />,,,pO <br /> <br />:j) <br />~ ~ <br /> <br />can be seen from the graph, only 8 percent <br />of the particulates measured in the emissions <br /> <br />of a plant similar to Craig Station were in <br /> <br />this size range. As a rough approximation of <br /> <br />the relative quantities of both S02 and parti- <br />culates which must be present in order for <br />health effects to be noted, empirical correla- <br />tions have indicated that S02 must exceed l15'ug/m3 <br />and particulates 160 ug/m3, (Air Quality Criteria <br />for Sulfur Oxides, 1969), levels well above those <br />expected from Craig Station. <br /> <br />Nit rogen Oxides <br /> <br />NO levels are expected not to exceed a <br />x <br />maximum 24-hour averag~ of 44 ug/m3, <br />which is equivalent to 0.036 ppm if <br />all oxides are NO and 0.023 ppm if all <br />are N02. The Federal annual arithmetic <br />standard is 100 ug/m3, (0.05 ppm) of <br /> <br />N02. Background levels are negligible in <br />the Craig area. Adverse human health <br /> <br />effects have been correlated with mean <br /> <br />exposures of 0,101 to 0.6 ppm. <br /> <br />2.2 Effects on Water Resources <br /> <br />2.2.1 Effects of the Craig GeneratinG Station <br />No liquid process effluents will be <br /> <br />discharged from the plant to the Yampa <br /> <br />-134- <br />