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Monitoring of the Leachline Trenches and Seepage Pits: Monitoring of effluent shall be by two <br /> monitoring/inspection ports within each leachline trench; at the beginning and at the ends of each <br /> leachline, as noted on the Project Plans. Monitoring/inspection tubes: 4" PVC Tee at the <br /> soil/effluent interface with 4" riser extending into a Christy/irrigation box, with a threaded cap. <br /> IV. CONCLUSIONS AND RECOMMENDATIONS <br /> NLS§ 4.1. The nitrate loading calculations show the resultant effluent from the entire subject <br /> Parcel will theoretically possess a nitrate-nitrogen concentration of 5.6 ppm nitrate-nitrogen or 25 <br /> ppm nitrate, which is below the Federal nitrate Maximum Contaminant Level (MCL) of 10 ppm <br /> nitrate as nitrogen or 45 ppm as nitrate. These nitrate loading determinations exclude factoring a <br /> 10%-30%reduction in nitrogen concentrations that can occur in septic tanks (See Oakley,Page 12). <br /> SSS§5.4, 6.8. The shallow soils underlying the subject property show a permeability that is quite <br /> varied. Leachline trench soils possess a comparatively slow permeability at 31.3 min/inch with a <br /> 0.522 gallons/ft2/day application rate. The seepage pit soil depth possess a permeability of 6.8 <br /> min/inch, with an application rate of 0.800 gallons/ft2/day. <br /> As illustrated on the attached Plans, the OWTS design will consist of 4 - 90 ft leachline trenches, 2 <br /> ft wide and a maximum of 42 inches deep. At the ends of each leachline, a 42-inch dia. seepage <br /> will be installed. The following calculations demonstrate adequate soil-effluent interface area to <br /> manage the anticipated flow volumes: <br /> 4 sf/1' LL x 90' LL=360 sf x 4 LLs= 1440 sf x 0.522 AR=752 gpd <br /> 4 SPs x 228 sf= 912 sf x 0.800 AR=730 gpd <br /> 1,482 gpd. Calculated ADF = 1,536 gpd <br /> NLS§4.2, SSS§6.7. The OWTS design for the proposed Heaven Temple takes advantage of the <br /> leachline clay soils for bacteriological/viral treatment and mitigation impedance of nitrification by <br /> keeping the effluent within the trenches before it flows into the seepage pits, which may occur under <br /> highly stressed conditions. <br /> Page -10- <br /> Chesney Consulting <br />