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such time the pump chamber has reached its normal level. Dose chambers are to be <br /> inspected routinely and maintained when necessary in accordance with their approvals. <br /> Soil Absorption Component <br /> The soil absorption component serving this structure is designed to accept domestic <br /> wastewater from a residential facility. The limits of operation of this component are <br /> shown in Table 2. <br /> The longevity of a soil absorption component depends greatly on proper and timely <br /> maintenance, and system use within or below the limits of reliable operation. Good <br /> water conservation practices by all occupants and the installation of water conserving <br /> plumbing fixtures are key factors in extending the useful life of this component. <br /> The soil absorption components operation must be assessed by inspection at least <br /> once every three years. The inspection shall include recording the levels of ponding, if <br /> any, in the observation pipes, and a visual inspection for any evidence of surface <br /> seepage or discharge from the component. On steeply sloping sites, areas of erosion <br /> should be identified and reported to the owner for repair. The surface discharge of <br /> domestic wastewater or sewage from the system is prohibited and considered a human <br /> health hazard. <br /> Traffic around or over the soil absorption component should be avoided particularly <br /> during winter months. The compaction or removal of snow cover over the component <br /> may lead to hydraulic failure by freezing. This type of failure is usually temporary, but is <br /> difficult or impossible to repair until weather conditions improve. In general, soil <br /> compaction over this component will reduce diffusion of oxygen into the soil and <br /> dispersal cell, which may lead to more intense, and earlier, organic clogging of the soil. <br /> Plantings of deep-rooted trees and shrubs directly over or within ten feet of the <br /> component should be avoided since root intrusion into the component may obstruct <br /> wastewater flow. <br /> Distribution Network <br /> Partial plugging of the distribution network may be detected by extremely long dosing <br /> time. The ends of the distribution laterals should be exposed and the pump activated to <br /> flush out any solid material. The liquid that is flushed out of the laterals is to be directed <br /> back into the distribution cell or into an acceptable container. If necessary, the laterals <br /> can be cleaned. <br /> Performance Monitoring for Mound Systems <br /> 1. The frequency of monitoring must be: <br /> a. At least once every three years following installation and, <br /> 3 <br />