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V. CONCLUSIONS AND RECOMMENDATIONS <br /> SSS§ 5.4, 6.8. The soils underlying the area proposed for wastewater disposal show acceptable <br /> permeability at the shallow depths representative of a filter bed. From the soil chemistry test <br /> results, it appears that there is some denitrification potential from the soils,but not as significant as <br /> has been observed in other areas of San Joaquin County. <br /> NLS§4.2, SSS§ 6.7. Since the water table is relatively high in elevation at 13.8 ft below grade, a <br /> filter bed effluent disposal system is the best option for the septic system structure to be installed. <br /> By installing thefilter bed as high in elevation osp_ sible, evapotranspiration may be expedited and <br /> nitrate formation may be impeded. Additionally, a filter bed reduces the footprint of the disposal <br /> area in comparison to conventional leachlines. <br /> NLS§4.1. The nitrate loading calculations demonstrate that if the toilet was flushed 100x per day <br /> (1.5 gals/flush x 100 flushes= 150 gpd ADF), the nitrate loading approaches approximately one- <br /> half the MCL. This incorporates a large safety factor tFiat v i compensate for comparatively small <br /> volumes of wash water from the sink. <br /> It appears from the soil chemistry results, that nitrate loading will be significantly greater from the <br /> indigenous nitrate-nitrogen soil concentrations than the percolating effluent from the Blue <br /> Rh ice railer. <br /> The filter bed sizing requirement calculations demonstrate there is ample area as denoted on the <br /> Siegfried Site Plans for the primary disposal and the 100%replacement areas. The exact <br /> dimensions of the filter bed system may be manipulated by Siegfried Engineering to conform with <br /> parking areas, etc. <br /> It is imperative that any food and food by-product wastes from the Office Trailer are handled as <br /> solid wastes and not be disposed of into the septic system. This will prevent concentrated organic <br /> loading,prolong the lifespan of the wastewater disposal system and reduce nitrate loading <br /> potential. <br /> 11 <br /> Chesney Consulting <br />