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<br />O G. " l n <br />, -," <br />.!L --L _ . <br /> <br />However, this does not appear to be a typical case. The following <br /> <br />graph taken from the same publication probably gives the more typi- <br /> <br />cal results of S02 concentrations on visibility, and illustrates the <br /> <br />effect of relative humidity which would be low at the site of the <br /> <br />Huntington Canyon Plant: <br />102 <br /> <br />w <br />~ <br /> <br />:lE <br /> <br />- 10" <br /> <br />w <br />'0 <br />z <br />.. <br />a: <br /> <br />~ <br />.. 100 <br />::> <br />en <br />> <br /> <br /> <br />RELATIVE <br />HUMIDITY. Ok <br /> <br />10-1 <br />10'3 10'2 10'1 100 <br />SULFUR DIOXIDE. p.p.m. <br /> <br />Fig, 1-5 Calculated Visibilit, (Visual Range) In Mllu at Varlaue Sulfur Diaalde Cancentratione <br />and at Different Relative Humldhlu In New Yar. elt,. <br /> <br />Cumulative Impact Considerations <br /> <br />Environmentalists have strongly advocated that the studies of <br /> <br />environmental effects should be expanded beyond the area that may be <br /> <br />influenced by a single plant, such as the Huntington Canyon Plant, <br /> <br />to include cumulative effects of other plants that may have an envi- <br /> <br />ronmental impact on the same areas. <br /> <br />37 <br />