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10,000 square feet to provide some treatment of the septic effluent. During leachline installation, it may be possible to breach the referenced hardpan layer to promote leachline effluent percolation. The number of seepage pits will also depend on the number of bedrooms the structure will have. If there will be several people inhabiting the residence, particularly children, a septic system should be oversized (increase the number of seepage pits) to accommodate additional wastewater flows. A 50% standby replacement area must also be incorporated into the design of the septic system. All related septic system structures and the domestic well must comply with published "distance" requirements from property borders, roads, easements, irrigation fields, etc. It must be recognized that all septic systems have lifespans. If the leachfield area should fail, the seepage pits will manage the effluent percolation. Seepage pits can also fail, although over a longer time period. A failure would primarily result from the advanced formation of a "biomat" or "clogging mat" on the wetted soil/effluent interface. This mat is composed mostly of aerobic and anaerobic bacteria and bacterial products consisting of a slime of polyuronides and polysaccharides. If the soil/effluent interface is well aerated, a variety of soil microfauna such as nematodes and protozoa may digest the clogging mat bacteria. Since the subsurface soils consist of a heavy clay material, anaerobic conditions will probably prevail, which may hasten leachfield and seepage pit failure. [6] LIMITATIONS The conclusions of this Soil Suitability Study are based upon past and present information concerning the location and results of percolation testing. Results of the perc testing can only be assumed to be representative of the subsurface conditions encountered in the area of testing. It is our opinion the findings included in this study are a reasonable assessment of the current subject property and surrounding study area conditions regarding septic system density, nitrate-nitrogen sources and potential impact to the underlying groundwater. This opinion cannot constitute a guarantee or warranty, either expressed or implied. Respectfully submitted, QUALITY CONTROL INSPECTION, INC. A4A Don ChesnetR.E.A. 7 0Q.1111t, ('�ontro� I"spectION