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This mat is composed mostly of aerobic and anaerobic bacteria and bacterial products consisting of a <br /> slime of polyuronides and polysaccharides. If the soil-effluent interface is well aerated, a variety of <br /> soil microfauna such as nematodes and protozoa may digest the clogging mat bacteria. <br /> Since the shallow subsurface soils on the property consist of very fine sands, silts, and clays, <br /> anaerobic conditions may prevail over time which may decrease the expectant life of any new septic <br /> f system. Lifespan will be mainly dependant upon the efficiency of the septic system to manage <br /> typical effluent flows. <br /> In addition, soil moisture content of the subsurface soils will play an important role in septic system <br /> operational capacity. For example, if heavy rains are experienced in any given rainy season, <br /> subsurface soil moisture content will increase, thus decreasing permeability. <br /> (§4.2) As discussed, test results from the domestic well reveals an apparent attenuation of the <br /> downward migration of nitrate by the mechanisms referenced. <br /> In unsewered areas and/or areas that have been, or currently are under agricultural production, it is <br /> highly recommended that bottled water be used for drinking and cooking purposes. <br /> LIMITATIONS <br /> The findings, testing, opinions and conclusions of this report are based upon information from <br /> standard engineering and analytical test procedures, contemporary scientific literature and agency <br /> consultations. Information in this report is deemed reliable by the sources from where it was <br /> obtained. Results of the percolation testing should be assumed to only represent the subsurface <br /> conditions encountered in the very specific location of testing as denoted on the Tentative Map, and <br /> not of the entire proposed two Parcels. <br /> This report is based upon current scientific knowledge to assess factors which are extremely variable <br /> and complex within the environment. San Joaquin County Environmental Health Department <br /> Sewage Standards have been employed for the purpose of preparing this study. Therefore, no <br /> guarantee or warranty is expressed or implied concerning any aspect of this investigation, the <br /> prevention of environmental impact, or related issues. <br /> The opportunity to provide this service for you is appreciated. If there should be any questions <br /> regarding the information contained within this report, please contact the undersigned. <br /> Respectfully submitted, <br /> a�tofe8fil <br /> 7.1 CHESNEY CONSULTING � V. Ch <br /> a No.75479 to <br /> Fxp.June 30,2(1 w <br /> Don Che ney, P.E. <br /> Registered Civil Engineer#C75479 �i <br /> at <br /> Page -6- 0 <br /> Chesney Consulting <br />