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Monitoring of the Filter Bed: Monitoring of effluent shall be with two monitoring/inspection 7Tee within the filter bed area, as noted on the Project Plans. Monitoring/Inspection tubes: 4" PV at soil/effluent interface with 4" riser extending into a Christy box, with a screw type cap. IV. CONCLUSIONS AND RECOMMENDATIONS NLS§ 4.1. The nitrate loading calculations show the resultant 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. A total nitrogen concentration equivalent to domestic sources, as referenced in the scientific literature, was used in the loading calculations. The reason for the low loading concentration is due to the large area the Holly Commerce Center facility occupies.— SSS§ 5.,(6.8r The shallow soils underlying the subject property show a permeability that is slightly over the maximum allowable rate,which is attributable to the tight,high percentage clay content soil. Uniformly applying the effluent through pressure distribution over the entire area of the filter bed will allow optimum effluent management by the receiving soils, The designed filter bed is216/�aller than the calculated area based on the Acceptance Rate, but 30% larger than the Leachh`ge Equivalent Requirement. It is my professional opinion that there is adequate disposal area for both the primary and reserve/replacement areas and that the receiving soils will readily manage the incoming effluent volume, even under severe hydraulic stress. Soil _ water management was observed this past winter when one of the highest recorded rainfall seasons occurred with virtually no runoff. r l NLS§ 4.2, SSS§ 6.7. The soil analytical test results show an unusuall i ) oncentration of subsurface soil nitrate-nitrogen. The source is unknown. However, this concentration is not necessarily-a negative issue. 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 much greater extent. Adjustments may have to be made to the proposed wastewater management system if unforeseen conditions are encountered, such as an increase in wastewater flow volumes. For example,the pumping may be changed to time-dose instead of on-demand so that effluent can be pumped at night when the facility population is much lower, or nonexistent. Water use must be minimal and fixtures'nust be checked monthly basis to ensure there is no leakage. I Page -10- Chesney Consulting