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F hat the bottom of each leachline trench (excluding trench walls) is 2 ft x 50 ft= 100 sq ft.ft x 3 leachlines = 300 sq ft. x 0.200 gals/ft2/day= 60 gals/day acceptance. ump has an area of 304 sq ft x 0.971 gals/ft'/day=295 gals/day. vl Therefore, 60 gpd+ 295 gpd = 355 gpd total surface area acceptance, which exceeds the projected daily wastewater flow by: 355 gpd minus 215 gpd= 140 gallons. NLS§4.1. The nitrate loading potential calculated on Page 10 indicates the percolating effluent may have a resultant nitrate concentration of 43.1 ppm as nitrate, which is below the drinking water Maximum Contaminant Level (MCL) of 45 ppm. The shallow underlying groundwater aquifers contain a nitrate concentration of approximately 76 ppm nitrate,based upon the water analysis of the old well. Consequently, the recharge effluent water should theoretically add a dilution effect to the top aquifer(s)that were tested. �It is recommended that a septic tan) effluent filter�e installed in both septic tanks. Sprinkler irrigation over both disposal areas must be carefully considered so as to not inundate the leachfield. During the spring and summer months, irrigation should be done intermittently during the day and/or evening hours. For example, the sprinklers could run for five minutes, six times per day. Irrigation during the wintertime should be suspended. Another source of nitrate loading can be from the lawn or other landscape-type plants that may be planted over the leachfield area. It is recommended not to use any nitrogen fertilizer in these areas. If it is deemed necessary to use them, "slow release"nitrogen fertilizers should be used on the lawns and/or landscaping to reduce nitrate loading from these areas. Accurate"as-builts"of the septic system must be supplied to the Environmental Health Department. All applicable "distance" and "setback"requirements must be strictly followed. It is imperative to recognize that all septic systems and disposal areas have a lifespan. This lifespan is unpredictable due to the numerous operational and environmental factors involved. A critical lifespan issue is controlling the on-site water use as much as possible. This may be accomplished by using low flow toilets and spring-loaded sink faucets. Restricting water use also includes checking for water leaks in toilets, dripping faucets, etc. on a regular basis. 13 Chesney Consulting