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7480sf sf= 1,404sf Application Area to be installed> 1,011 sf area required. pank and primary disposal areas are denoted on the attached Site Plans produced by Hoste Engineering. There is more than ample area for 100%replacement to the south of the primary disposal area, as illustrated. NLS§3.2. By capping the ends of the perforated leachlines, which are to be installed level, this procedure forces the effluent to remain within the shallow soils to mitigate nitrate loading. As the leachline trenches develop biomat and permeability slows, the sumps will manage a greater portion of the effluent flow volumes. V. CONCLUSIONS AND RECOMMENDATIONS SSS§ 5.4, 6.8. The shallow subsurface soils at 36" below existing grade where the proposed leachfield is to be installed, reveals a very slow permeability sandy loam soil which may have been induced by a high magnesium content soil at this depth. There is a change in soil structure from approximately 6 ft to 10 ft below grade from a sandy silt to a silty sand. Permeability is highly favorable at the 10-ft sump depth. Consequently, since there was a failing perc rate at the typical leachline depth of 36 inches, sumps should be installed to compensate for this slow permeability and promote OWTS longevity. NLS§ 4.1. The nitrate loading calculations show the resultant effluent from the subject property will theoretically possess a nitrate-nitrogen concentration of approximately 4.3 ppm which is 57% under the Federal nitrate Maximum Contaminant Level (MCL) of 10 ppm nitrate-nitrogen. NLS§4.2, SSS§ 6.7. All On-site Wastewater Treatment Systems (OWTS) will eventually fail. A very long lifespan for the primary disposal area system can be expected based on the proposed operation of the proposed OWTS consisting of equal distribution of effluent through a distribution box and into three leachline trenches, followed by three 2' W x 10' D sumps. i 8 Chesney Consulting