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%wool Faddition, ilding designer/engineer/architect, the plumber, the landscaper, and the wastewater disposal installer must all coordinate so that proper grades are established and maintained. In effluent lines should not cross fresh water or electrical lines. If crossing cannot be avoided, the wastewater lines should cross under fresh water lines and be adequately encased per EHD guidelines. Sprinkler irrigation over both disposal areas must be carefully considered so as to not inundate the filter beds. 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. Run times and number of daily irrigations should be determined by the landscape contractor. 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 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 monthly basis. 17 Chesney Consulting