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2-8 <br /> As described above in Section 2.1.5, the composting pad will be constructed of native earth. <br /> The permeability of soils below the surface of the composting pad is low. Operations will be <br /> suspended, if necessary, during periods of wet weather to prevent damage to the <br /> composting pad or the surface will be paved with gravel or asphalt if the economics justify <br /> the higher cost. Due to the low-permeability of native soils and depth to groundwater, <br /> monitoring of soil moisture is not warranted. In accordance with WDR Order No. R5-2014- <br /> 0006, the soil in the upper one foot of the composting pad and compost storage pad areas <br /> are tested and if necessary, conditioned and compacted to achieve 1 X 10-5 cm/sec vertical <br /> hydraulic conductivity. <br /> 2.1.7 Leachate Control (14 CCR, Section 17867(a)(12)) <br /> Since additional water will only be applied to the compost when necessary for maintaining <br /> adequate internal moisture, significant leachate generation is not anticipated. As stated in <br /> Section 3.5.3, the site is in a region of net evaporation. Additionally, compost windrows <br /> typically form a light crust on the outside, which repels rainfall. The site's drainage control <br /> system was designed to handle all runoff from a 25-year, 24-hour storm, including runoff <br /> from the compost piles. This system is illustrated in Figure 6 and runoff calculations are <br /> attached in Appendix C. <br /> a. Leachate Barriers <br /> There are no leachate barriers currently proposed for the site. <br /> b. Leachate Barrier Locations <br /> There are no leachate barriers currently existing and/or proposed for the site. <br /> C. Monitoring and Sampling Procedures <br /> There are no leachate monitoring and sampling procedures proposed for the facility. Runoff <br /> will be collected in a sedimentation basin located in the southwest corner of the site. Runoff <br /> will be sampled and monitored to meet pretreatment requirements or the site's Storm Water <br /> Pollution Prevention Plan and Storm Water Monitoring Plan depending on final disposal of <br /> collected water. <br /> d. Leachate Volume <br /> As discussed previously, significant leachate generation is not anticipated. <br /> e. Treatment, Storage and Discharge <br /> Water collected in the sedimentation basin will either be evaporated, used during the initial <br /> mixing of the compost, used for dust control, pumped to the on-site leachate evaporation <br /> pond, or transported to a municipal treatment works depending on the quality and quantity <br /> of collected water. Water used in the initial mixing of the compost will bring the water <br /> content of the compost to proper levels. <br /> f. Landfill Sites <br /> Forward does not plan to locate the Compost Facility on an existing or closed refuse fill area. <br /> However, it should be noted that the facility is located on an area permitted for future WMUs <br /> at the Forward Landfill. <br /> Forward Composting Facility SWT Engineering <br /> Report of Composting Site Information-November 2014 <br /> z:\projects\allied waste\forward\resource recovery facility\5 yr permit rvw 2013-14\resi 2014\text\9-nov 2014 track changes\sec 2.doc <br />