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2 .5 CLIMATE <br /> The landfill has a climate consisting of hot dry summers and cool <br /> damp winters. The average daily maximum temperature in July and <br /> August exceeds 90 degrees, with frequent daily highs over 100 <br /> degrees. Minimum temperatures in January average between 30 and 40 <br /> degrees, with maximum temperatures in the mid 501s. All <br /> temperatures are in degrees fahrenheit. <br /> Average annual precipitation for the site is approximately 17.5 <br /> inches. An isohyetal map of San Joaquin County which shows the <br /> Foothill Sanitary Landfill site is included as Figure 5. The <br /> majority of the precipitation occurs between the months of November <br /> and April. <br /> The mean annual evaporation in the region of the site is <br /> approximately 78 inches, with a 1-inch minimum in December or <br /> January and a 15 inch maximum in July. <br /> The estimated wind rose for the site is shown as Figure 6. This <br /> wind rose was developed by EMCON using wind speed and direction <br /> data compiled at the Stockton weather station with data collected <br /> from 1941 to 1945. The estimated wind rose shows winds blowing <br /> most frequently from the west (18.8 percent of the time) and <br /> northwest (15.5 percent of the time) , with a calm period occurring <br /> 9.8 percent of the time. <br /> Drainage facilities, soil surfaces, and the access road are checked <br /> daily during wet weather. Ditches, temporary berms, or other <br /> erosion control measures are used as necessary. <br /> 2 . 6 CONTROL OF NUISANCE FACTORS <br /> 2 . 6. 1 Noise <br /> Noise from on-site equipment is controlled by proper maintenance of <br /> mufflers. Because of the remoteness of the site, noise is not a <br /> significant factor. <br /> 2 . 6.2 Odor <br /> Odor is controlled by applying proper cover material to the working <br /> face and by operating in small cells to minimize the amount of <br /> exposed refuse. Odor from recyclable materials being stored on- <br /> site will be controlled by taking the materials to market more <br /> often if necessary. <br /> 2 . 6. 3 Litter <br /> Litter is controlled by installing temporary fences downwind of the <br /> working face and permanent fence along the site perimeter. The <br /> entire site is inspected daily for litter by site personnel. The <br /> County's policy requiring all loads to be covered has greatly <br /> reduced litter problems along public roads. <br /> 10 <br />