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Nitrate Loading: <br /> Nutrient loading, specifically nitrate to ground water,is a to be considered since there potential <br /> for nitrate contribution to groundwater from the sewage entering the onsite wastewater <br /> treatment system. <br /> Nitrate level in the groundwater was determined by drawing samples and testing from two wells <br /> on the subject property. <br /> Mass transport consideration: Since there currently exist an active and in-use for long term <br /> septic system, analyses in such scenario is appropriate:A nitrate loading consideration often <br /> considers an increase in loading of potential nitrates due to a new septic system and as such a <br /> calculation to balance the existing steady state with new load from aseptic system and potential <br /> dilution from rainwater recharge. <br /> In this situation at hand, there is, and has been for decades, an active septic system; therefore, <br /> considerations of the current conditions are appropriate. If there is a basis to determine that the <br /> proposed use will not exceed the current use and if the current use does not exceed the nutrient <br /> loading concerns, then it is reasonable to deduce that the proposed use will not provide higher <br /> nutrient load then as now exists. <br /> 1. Groundwater <br /> Depth and direction of flow is described in previous soil discussions. <br /> Any groundwater contamination source in the general location of this project appears to be what <br /> can result for general agricultural uses,including use of fertilizer and resulting leaching,and <br /> septic systems from relatively low number and low density of dwellings in the general vicinity. <br /> Any groundwater contamination from the site uses of the continued use of the current septic <br /> system for restrooms and breakroom of employees will not exceed historical use of the site <br /> service one or more dwellings. The sewage design from of the proposed facility is less than <br /> sewage design flow of currently permitted use. <br /> 2. Sources of nitrate to groundwater. <br /> Agricultural uses of offsite land adjacent to the subject parcel are expected to remain as they <br /> currently exist and therefore there is anticipated to be no change of nitrate loading from offsite <br /> uses. <br /> Generally,rainfall and corresponding recharge of groundwater is anticipated to reduce nitrate <br /> load from the septic system use at the subject parcel. <br /> Acorn Onsite, Inc. <br /> Nitrate Loading Study and soil Suitability Report—24707 South Bird Road <br />