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72.) ic loading to the septic tanks will also decrease, which will allow the tanks to have <br /> ficiency in digesting blackwater wastes, 3.) Fats, oils and grease buildup will be <br /> the piping and other appurtenances of the system, 4.) There should be a reduction in <br /> biomat formation within the soil/effluent interface within the Infiltrator® chambers, leachline <br /> trench and seepage pits, leading to an increase in the efficiency and longevity of the disposal <br /> areas, and 6.) An ultimate reduction in nitrate loading. However, it is imperative to note that all <br /> septic systems have a lifespan, which is unpredictable to due numerous factors. <br /> f The theoretical permeability of the soil may eventually reach a long-term application rate <br /> (LTAR) of approximately 0.5 gallons/ft'/day due to biomat formation. With the filter bed having <br /> an area of 1800 sq ft, then the LTAR should be approximately 900 gallons/day, which is close to <br /> the ADF without the peaking factor. The total application area of the two leachlines and seepage <br /> pits are: 2 ft+2 ft+2 ft x (40 ft x 2) +2(148 ftz) = 776 ft' <br /> From the analytical results of the groundwater that will serve the project, it was determined that <br /> the underlying aquifers contain a low concentration of nitrate. This low concentration may be <br /> attributed to lack of nitrate sources, nitrate currently in-transit, clay strata and possible influence <br /> from the Mokelumne River. Previous analytical testing of several wells in the proximity to San <br /> Joaquin County rivers (e.g., San Joaquin, Stanislaus, Mokelumne, etc.)have shown significantly <br /> f lower, or nonexistent nitrate concentrations. <br /> It is important to recognize that all septic systems have a lifespan. This lifespan is unpredictable <br /> due to the numerous operational and environmental factors involved. John Winneberger, a <br /> highly respected wastewater researcher, attempts to predict seepage bed longevity in certain soils <br /> (See Kaplan, pg. 22): Area(sq ft) =263 + 26 x years (of use before failure). With regard to this <br /> project: 1,800 sq ft =263 + (26 x 59). Therefore, based upon Mr. Winneberger's formula, the <br /> chambered seepage bed should last 59 years before failure. <br /> 1� <br /> I <br /> 16 <br /> CFzeRwy Consufting <br /> i <br />