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Factors decreasing the groundwater nitrate concentration include denitrification, groundwater movement(both vertical and horizontal), well pumping and hydraulics, and cleaner water recharge contributing to a dilution effect. If each of these sources and attenuating factors could be quantified on a mass balance basis, it may be that nitrate input is now roughly equivalent to output. Given that agricultural irrigation recharge is the largest single contributor to groundwater nitrate concentrations, and since the underlying and surrounding land has been farmed for several decades, it could be assumed that the nitrate concentrations in the underlying groundwater should be much higher than those observed, if the attenuating factors were not significant.- This is particularly evident with the soil nitrate-nitrogen test results of the sampled depths. The denitrification potential appears to be a factor due to the clay content. ' Adjustments may have to be made to the proposed wastewater management system if unforeseen conditions such as an increase in wastewater flow volumes dictate. For example, if wastewater flows are higher than projected in this Study, the septic system may have to be retrofitted with a' dosing chamber tank and duplex pumps to dose the effluent to the filter bed Monday through Friday when wastewater flows are expected to be much lower or nonexistent. As referenced, domestic water use for the entire project, and landscape water use, must be kept to an absolute minimum. Interior domestic water use can be accomplished with low flow toilets/water reducing aids, the timing of showers, and regularly checking for leaks within the entire plumbing system. The project plumber and septic system contractor must coordinate on the construction details of the influent line coming from the Prayer and Meditation Center Restrooms to the 1,200 gallon septic tank/pump chamber. To keep organic loading to a minimum, garbage disposals (grinders) should not be installed in any kitchen. Additionally, due to the indigenous clay soils, water softeners also should not be installed. The sodium liberated by water softeners will disperse and deflocculate the clay lattice soil structure and render the clay soil impermeable. Page-12-