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CALINE 3 ASSUMPTIONS <br />Traffic Data -- was provided by Willdan Associates in April 1987. <br />Current, future, and future + project daily and peak hour volumes <br />were provided. <br />Roadway Speeds -- were provided by Willdan Associates. Along <br />Memory Lane, Seventeenth Street, First Street and Warner Avenue <br />30 mph was assumed. Along Bristol Street, 18 and 20 mph were <br />assumed for existing conditions, 9 mph for 2006 no project condi- <br />tions, and 18 and 31 mph for 2006 plus project conditions. <br />Meteorological Conditions -- included 1 m.p.h. winds, stability <br />class D with a persistance factor of 0.70 for eight -hour values <br />and stability class F for "worst case" one -hour values and wind <br />directions parallel to the highest traffic volume leg to insure <br />that CO concentrations are maximized (worst case for the nearest <br />receptor). <br />Sighway Widths -- were derived from roadway cross - sections pro- <br />vided by Willdan Associates. The widths included 3 meters per <br />side as specified for the Caline 3 model input. <br />Emission Factors -- were taken from ENV028A EMFAC 6D runs for <br />Orange County by the OCEMA in 1984 and 1985, as shown on page 4 <br />of the Appendix and below. <br />CALIFORNIA CORRECTED MOTOR VEHICLE <br />EMISSION FACTORS <br />I _ -- - - <br />-- <br />- -_ <br />1987'-=-=- - <br />----- --= +_2006 <br />Background Concentrations -- for carbon monoxide were derived <br />from ambient air quality data for 1985 taken at the Anaheim <br />station and assembled by the GARB. The second highest hourly <br />concentrations were used ( 11.7 ppm for the $ hour average, 18.0 <br />ppm for the I -hour average). The year 2006 8 -hour background <br />l concentration was derived from the 1982 Draft AQMP. The future <br />` 1 -hour average was determined by the ratio between the 1985 one <br />and eight -hour averages. <br />I� <br />D <br />