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D. DESIGN AND OPERATIONAL SPECIFICATIONS OF THE PRESSURIZED DISPOSAL SYSTEM Pump Basin to Filter Bed: Effluent will gravity flow to the pump basin where a duplex pump system will pressurize the effluent: Orenco Pump Basin PN: P112454. Orenco Duplex Effluent Pump System: PN: PF3005, '%HP,30 gpm, 115 Volt contained within the pump basin. Total effluent volume can be calculated by checking pump cycle times on the panel and also to ensure both pumps are distributing effluent equally. Pressurized effluent to travel in Sch. 40 PVC 2.0" dia. Laterals for the Filter Bed: Sch. 40 PVC 1.0" dia., 1/8" orifice directed at 12 o'clock with orifice shields, 5.0 ft spacing and 78 ft long. Install clean-outs at the end of each lateral and at the end of manifold, and to be contained within Christy boxes. IV. CONCLUSIONS AND RECOMMENDATIONS NLS§ 4.ZThe nitrate loading calculations show the effluent from the proposed project will theoretically possess a nitrate-nitrogen concentration well below the Federal nitrate Maximum Contaminant Level (MCL) of 45 ppm as nitrate or 10 ppm nitrate as nitrogen, and may actually create a dilution effect tot eh underlying groundwater. A total nitrogen concentration equivalent to domestic sources, as referenced in the scientific literature,was used in the loading calculations. SSS§ 5.4, 6.88.. The soils underlying the proposed filter bed area show a rapid permeability considering the clay content. Applying the effluent uniformly through pressure distribution over the entire area of the filter bed will allow optimum effluent management by the receiving soils. Although the Leachline Equivalent Requirement calculated the filter bed requirement to be 995 ft , it is my professional opinion that there is ample disposal area at 800 ft . This 800 ft' area also applies to the 100%reserve/replacement area. The receiving soils will readily manage the incoming effluent volume, even under severe hydraulic stress. Soil stormwater management was observed this past winter when one of the highest recorded rainfall seasons occurred with virtually no ponding or runoff from the uncovered leachfreld area. NLS§4.2 SSS§ 6.�._ As the effluent infiltrates into and percolates downward from the soil- effluent interface, the saturated soil conditions will create an anaerobic environment,thus promoting denitrification. Coupled with the organic fraction from the effluent, this should promote denitrification to a greater extent. Crash posts, also known as bollards or safety barriers, are to be installed around the septic tank and pump chamber. The number of posts and installation procedures shall be provided by the company installing them. Posts have been shown in the Site Plan only as a representation and not for construction purposes. In addition,the posts should be installed immediately after the completion of the septic system installation since it would be prudent to install the pump controller/alarm box on one of the posts. Page-9-