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Water softeners should not be installed because the sodium from water softeners will bind the c7lay soil and destroy permeability. Although this phenomenon is debated in the scientific literature, it is our opinion that it is a distinct possibility and should be avoided since it could lead to a decrease in disposal area longevity. The building designer/engineer/architect, the plumber, and the septic system contractor must all coordinate so that proper grades are established thus preventing the lift station tanks from having to be set too deep in the soil. The bottom of the tank cannot be any deeper than 10 feet below existing grade and possibly shallower if groundwater is encountered higher than 11 ft below grade. In addition, effluent lines should not cross fresh water or electrical lines. Accurate"as-builts"of the septic system to be installed in the future 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 monthly basis. Another source of nitrate loading can be from the lawn or other landscape type plants that may be planted over the filter bed area. It is recommended not to use any nitrogen fertilizer in this area. 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 the disposal area. 20 Chesney Consulting