ARCHIVED REPORTS_MAY & JULY 2014-TPR

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1-7 1.7.~3 Evaporation The estimated annual evaporation for the site is 78.43 inches based on Pan A evaporation data recorded between 1919 and 1968 at Oakdale Woodward Dam (Station No. BOO 630500, latitude 37 °51'28", longitude 120°52'42", elevation 215 feet above mean sea level l amsl }), located approximately 13 miles southeast of the site (California Department of Water Resources, 1979). A minimum mean monthly evaporation of 1.14 inches has been calculated for December and January, and a maximum mean monthly evaporation of 14.69 inches has been calculated for July. 1.7.~4 Wind During summer periods . winds usuall y originate from the north end of the San Joaquin Valle y and flow in a south-southeasterl y direction through the valle y and Tehachapi pass. and then into the neighboring Southeastern Desert Air Basin. During winter months . winds occasionall y originate from the south end of the valley and flow in a north-northwesterl y direction. During winter months . the valley experiences light. variable winds . less than 10 miles per hour (mph ),. Low wind speeds , combined with low inversion la yers in the winter . create a climate conductive to high concentrations of certain air pollutants. The California Air Resources Board (1984) analyzed wind data for the Stockton WB Airport weather station for the period from 1964 to 1980. The prevailing wind for the Stockton station blows from the west-northwest (45.3 percent of the time) and the north (15.9 percent of the time). Calm wind s occur 6.9 percent of the time. A wind rose (Figure~--9 ) developed from the Stockton WB Airport data provides wind direction information. The mean annual wind speed is 8.2 miles per hour. Forward Resource Recovery Facility SWT Engineering Transfer/Processing Report -May 2014 z:\projects \allied waste \forward\resource recovery fac il ity \5 yr perm it rvw 2013-14\tpr 2014\text \rev track\sec1-rev tr.do c