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The 2,000 gallon septic tank will be placed adjacent to the Restroom building. Therefore, only liquid effluent will flow east to the D-box. The length of the tightline run is approximately 200 ft; consequently, there must be a clean-out installed midway between the tank and D-box. The 100%replacement/reserve area is designated directly to the north of the primary disposal area since there is more than ample area as indicated on the aerial photo. V. CONCLUSIONS AND RECOMMENDATIONS SSS§ 5.4, 6.8. The soils underlying the proposed wastewater effluent disposal area show acceptable permeability at the assumed soil-effluent interface. From the soil chemistry test results, it appears there is some denitrification potential by the soils, but not as significant as has been observed in other areas of San Joaquin County. NLS§ 4.1. The nitrate loading calculations demonstrate that if the toilets in all the Unisex Restrooms were flushed 100x per day(1.5 gals/flush x 100 flushes x 6 Restrooms= 900 gpd ADF),the nitrate loading remains 60%below the Maximum Contaminant Level (MCL). The filter bed sizing requirement calculations demonstrate the system will be installed with ample area. Correlating the filter bed area with the percolation test results: The perc test results of 16.7 min/inch translates to an application rate of 0.700 gals/ft2/day. Using the ADF of 900 gpd: 900 gpd- 0.700 gals/ft-/day = 1,285 ft2. Therefore, the filter bed size of 1,260 ft'` is appropriate based on the test results obtained. The 100%replacement/reserve area is adequately situated adjacent to the north of the primary disposal areas. Railroad ties, or an equivalent barrier, should be placed around the perimeter of the filter bed to prevent vehicles from driving or parking over it. NLS§ 4.2, SSS§ 6.7. The water table in this locale is approximately 25 ft below grade, and highly unlikely to ever rise to a previous measurement of 18 ft below grade due to extensive groundwater pumping. It is imperative that any food and food by-product wastes must be handled as solid wastes and not be disposed of into the OWTS. This will prevent concentrated organic loading, prolong the lifespan of the wastewater disposal system and reduce nitrate loading potential. The fixtures in both restrooms should be checked periodically, preferably once per month to ensure there is no leakage that could cause failure of the disposal area. It is important to recognize that all septic systems have a lifespan, which is dependant on several factors and is therefore difficult to determine. OWTS failure would primarily result from the advanced formation of a "biomat" or "clogging mat" on the wetted soil/effluent interface. 8 Chesney Consulting