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water to a basin located west of the RRF and Composting Facility. The basin can hold the net average annual rainfall. The water collected in the basin can be used as process water, as discussed in Section 3.7, to meet the desired moisture contents for composting. It should be noted that water collected in the basin is not currently used as process water. 3.6 PAD MAINTENANCE The Composting Facility pad is constructed of low-permeability compacted native soil and is sloped to allow free drainage and minimize ponding. The compost pad area is sized to accommodate each of the selected composting technologies. The green and wood waste grinding area is approximately 1.56 acres. The green and wood waste screening and storage area is approximately 1.07 acres, and the windrow areas are approximately 14.8 acres. The screening and finished product area is approximately 2.97 acres. Minimizing standing water eliminates the potential source of odors. 3.7 PROCESS/WASTEWATER CONTROLS Although this alternative is not currently used, the sedimentation basin water may be used as process water to meet the desired moisture needs for composting operations. Water collected in the sedimentation basin is either evaporated, used during the initial mixing of the compost, used for dust control, pumped to the on-site impoundment, or transported to a municipal treatment works depending on the quality and quantity of collected water. Water used in the initial mixing of the compost brings the water content of the compost to proper levels and eliminates the potential for pathogen regrowth in the active compost. There are four production water wells at the site. One well, located near the main entrance facility was drilled to a depth of approximately 135 feet and groundwater occurs at a depth of approximately 70 feet. The well was likely installed before the opening of the landfill, having been previously used for agricultural purposes. It is pumped at a rate of approximately 1,500 gallons per minute (gpm) at a maximum frequency of approximately 27 times in a typical working day. Another well is located south of the South Fork of South Littlejohn's Creek in the southeast corner of the RRF and Compost Facility area, and has a capacity of 500 gpm. The third well is located along the northern boundary of the former Austin Road Landfill. This well was installed in 1972 and has a production of approximately 60 gpm. The fact that groundwater flow near the existing Forward Landfill is not modified by pumping from this well suggests that it is screened in a confined unit below the uppermost groundwater units that are monitored at the site. The fourth production well is located along the eastern boundary of the site, just south of the entrance to the Compost Facility/RRF. The locations of the wells located in the Compost Facility/RRF area is shown on Figure 1. Since water is only added to the compost to maintain adequate internal moisture, significant leachate generation is not anticipated. There is no on-site wash water generated. Therefore, no wastewater is generated; however, should some be generated, it will be collected and discharged to the Class II surface impoundment utilized as a leachate pond. Forward Compost Facility-OIMP 7 SWT Engineering z:\projects\allied waste\forward\resource recovery facility\5 yr permit rvw 2013-14\tpr 2014\appendices\app a-3-oimp\oimp text_rev 111414.doc;11/18/2014