2003/06/03 - SANITARY - SAN - Other

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3 Warning: No one should enter a septic or other treatment or holding tank for any reason without being in full compliance with OSHA standards for entering a confined space. The atmosphere within the septic or other treatment or holding tank may contain lethal gases, and rescue of a person from the interior of the tank may be difficult or impossible. Tank abandonment shall be accordance with Comm 83.33, Wis Adm. Code when the tank is no longer used as a POWTS component. Soil Absorption Component The soil absorption component serving this structure is designed to accept domestic wastewater from a residential facility. The limits of operation of this component are shown in Table 2. The longevity of a soil absorption component depends greatly on proper and timely maintenance, and system use within or below the limits of reliable operation. Good water conservation practices by all occupants and the installation of water conserving plumbing fixtures are key factors in extending the useful life of this component. The soil absorption component's operation must be assessed by inspection at least once every 3 years. The inspection shall include recording levels of ponding, if any, in the observation pipes, and visual inspection for any evidence of surface discharge from the component. On steeply sloping sites, areas of erosion should be identified and reported to the owner for repair. The surface discharge of domestic wastewater or sewage from the system is prohibited and considered a human health hazard. Traffic around or over the soil absorption component should be avoided particularly during winter months. The compaction or removal of snow cover over the component may lead to hydraulic failure by freezing. This type of failure is usually temporary,but is difficult or impossible to repair until weather conditions improve. In general, soil compaction over this component will reduce diffusion of oxygen into the soil and dispersal cell, which may lead to more intense, and earlier, clogging of the soil. Planting of deep rooted trees and shrubs directly over or within 10 feet of the component should be avoided since root intrusion into the component may obstruct wastewater flow. Contingency Plan In case of soil absorption failure the existing distribution network could be removed,then excavate cell to determine zone of failure. Remove clogging mat and replace with Astm C 33 sand and clean , inspect or replace distribution network and cover.