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<br />Gr' .' ':(') <br />U..&.l.... <br /> <br />Vegetative Effects <br />The plantsite and storage reservoir (Electric'Lake) face the <br /> <br />boundaries of the Manti-La Sal National Forest on the west, southwest, <br /> <br />and northwest where the principal vegetation consists of fir, pine, <br /> <br />quaking aspen, oak brush, with scattered sagebrush flats. The area to <br /> <br />the east, south, and northeast of the plant site changes from typical <br /> <br />juniper, pinon growth to desert type vegetation, such as sagebrush, <br /> <br />rabbit brush, etc., as the distance from the plantsite increases. <br /> <br />"The First Annual Report of the Council on Environmental Quality, .@./ <br /> <br />states that: <br /> <br />". . . At sulfur oxide levels routinely observed in some of <br /> <br />our cities, many plants suffer a chronic injury described as <br /> <br />I early aging. t Nitrogen dioxide produces s:i1nilar injury sy-mp- <br /> <br />toms and seems to restrict the growth of plants even when sy-mp- <br /> <br />toms of injury are not visible. Ozone, a major photochemical <br /> <br />oxidant, is a significant threat to leafy vegetables, field <br /> <br />and forage crops, shrubs, and fruit and forest trees--particu- <br /> <br />larly conifers. The damage from ozone in minute quantities can <br /> <br />be great. Extended ozone exposure to 0.05 parts per million <br /> <br />can reduce a radish yield 50 percent." <br /> <br />The DREW publication, '~ir Quality Criteria for Sulfur OXides,'Q/ <br /> <br />reports with respect to sulfur dioxides that, " <br /> <br />adverse effects <br /> <br />on vegetation were observed at an annual mean of 85 p.g/rr? (0.03 p.p.m.)." <br /> <br />The University of Utah study referred to herein will include fumi- <br /> <br />gat ion trials of the effect of S02 vegetation indigenous to the plant <br /> <br />area. <br /> <br />34 <br />