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3-9 Forward Composting Facility SWT Engineering Report of Composting Site Information - January 2022 and emergency situations. c. Preprocessing Procedures Preprocessing will include inspecting the incoming material to remove any visible contaminants. Loads will be visually inspected in the material sorting area at the Compost Facility (see Figure 2). A magnetic separator is used to extract nails and other ferrous contaminants from the green waste material after it has been shredded. d. Process Time As discussed in Section 1.3.1, the Compost F acility is designed and permitted to process up to 1,100 tpd of compostable materials. The specific capacity depends on t he composting process being used, density of materials, and the quality of compost product. The active windrow compost process time is between approximately 4 to 12 weeks, depending on the compost product quality. The windrow curing process take s from approximately 1 to 6 months. The ASP composting process time is approximately 8 weeks. e. Chemical or Bulking Agents As previously mentioned, amendments and/or additives are not currently utilized at the RRF/Composting facility. Prior to use of amendment and/or additives, Forward will obtain approval from the LEA and Regional Water Quality Control Board. 3.5.3 Climatic Conditions Climatic conditions are not expected to adversely affect site operations. It does not snow but can occasionally freeze at the site. Forward implements a winterization program each year to prepare the internal roads for all weather access during the rainy season (October through April). The climate of the region is typical of the California Central Valley. Winters are generally cold and wet with fog, while summers are hot and dry. Climatological data used in the site design was gathered from representative weather stations near the site. Representative climatologic stations wer e selected based on their proximity to the site and a reliable period of records for the station. Temperature. Summer high temperatures often exceed 100 °F, averaging from the low 90’s in the northern part of the valley to the high 90’s in the south. The d aily summer temperature variation can be as high as 30°F. Winters for the most part a re mild and humid. Average high temperatures during the winter are in the 50’s, while the average daily low temperature is approximately 45°F. Precipitation. Precipitation at the project site is typical of the Central Valley region. Rainfall is seasonal, with approximately 90 perce nt of the rainfall occurring between November and April. Snowfall is unusual at the site. Figure 7 presents an isohyetal precipitation map for San Joaquin County showing lines of equal precipitation on a countywide basis (San Joaquin County Department of Public Works, 1991). The isohyetal precipitation map divides the whole of San Joaquin County into three rainfall intensity zones. The project site is located in Zone 2 of the three rainfall zones, as illustrated in Figure 7. Mean annual precipitation f or Zone 2 on the San Joaquin County isohyetal precipitation map is approximately 13.5 inches.