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polysaccharides. If the soil/effluent interface is well aerated, a variety of soil microfauna such as <br /> nematodes and protozoa may digest the clogging mat bacteria. This biological activity may be <br /> somewhat inhibited by the clay soil structure. <br /> If it is desired to theoretically maximize the life of the leachfield, the leachfield may be designed <br /> with two separate fields. A manual diversion valve may be installed to "rest" one leachfield while <br /> the other is active. <br /> With respect to the protection of the underlying groundwater from pathogens and nitrates (NO3),the <br /> depth to groundwater (75 ft), the high clay content soil and the low density of housing can be <br /> considered favorable for the attenuation of nitrate contamination. However, it appears agricultural <br /> practices have influenced the nitrate groundwater concentration of the aquifers which serve the <br /> referenced well. <br /> [7] LIMITATIONS <br /> The conclusions of this Soil Suitability Study are based upon current information concerning the <br /> location and results of the percolation testing,and the highest anticipated depth to groundwater. The <br /> results of the percolation testing can only be assumed to be representative of the subsurface <br /> conditions encountered in the area of the testing. <br /> It is our opinion that the findings included in this study are a reasonable assessment of the current <br /> subject property conditions. This opinion cannot constitute a guarantee or warranty,either expressed <br /> or implied. <br /> Respectfully submitted, ��►+� <br /> VALLEY AG RESEARCH <oo�0 C <br /> . a F \ <br /> N0. 04675 z <br /> Don Chesney, R.E.A. * Expires: <br /> Cv CA 1,l <br /> vaffey Ag PP <br /> searck <br />