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3-11 Forward Composting Facility SWT Engineering Report of Composting Site Information - January 2022 South Littlejohn’s Creek alignment is also a very flat gr adient, 0.0006 feet per foot; therefore, erosion is not a significant concern. Evaporation. The estimated annual evaporation fo r 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 above mean seal level [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. Wind. During summer periods, winds usually originate from the north end of the San Joaquin Valley and flow in a south-southeast erly direction through the valley and Tehachapi pass, and then into the neighboring Southeastern Desert Air Basin. During winte r months, winds occasionally originate from the south end of the valley and flow in a north -northwesterly direction. During winter months, the valley experiences light, variable winds, less than 10 miles per hour (mph). Low wind speeds, combined with low inversion layers in the winter, create a climate conducive to high concentrations of certain air pollutants. The California Air Resources Board (1984) analyzed wind data for the Stockton 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 winds occur 6.9 percent of the time. A wind rose (Figure 9) developed from the Stockton WB Airport station data provides wind direction information. The mean annual wind speed is 8.2 miles per hour. 3.5.4 End Use Forward produces a range of products and market s all of the compost produced by the Compost Facility. Forward is investigating potential uses such as t op soil amendments, mulch ingredients, and/or soil conditioners. Material may be produced in both bulk and bagged forms. Some of the product is utilized on-site for soil amendment and/or ADC . Nonrecoverable or nonmarketable residue are not stored longer than 24 hours at the facility. The residues are removed and transferred for disposal at the active working face of the landfill in accordance with 14 CCR, Section 18227(j). 3.5.5 End Product Forward follows a process to ensure that the compost end product is innocuous and free of sharp edges and particles that have the potential to be harmful to human health and safety. The quality of the end product will depend on the product's use. The highest quality end product would be used as top soil amendment. Forward follows the sampling and analysis requirements, as discussed in previous sections , to ensure that all compost product s meet regulatory requirements for the protection of human health and safety. All products are screened and free of sharp -edged particles. 3.5.6 Environmental Health Standards Forward follows processes to ensure that compost end products meet environmenta l health standards for maximum metal concentrations and pathogen reduction. One sample per 5,000 yards of finished compost is a nalyzed at a Department of Health Services Approved Laboratory, in accordance with 17868.1(a)(3). Samples are analyzed for the constituents required pursuant to 14 CCR, Section 17861.1. Compost product which exceeds the