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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. Since the <br />shallow subsurface soils on the property consist predominately of fine sands, aerobic conditions may <br />prevail over time which may slightly increase the expectant lifespan of an OWTS installed on the <br />subject property. <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 winter, subsurface <br />soil moisture content will increase, thus decreasing permeability. <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 specific location of testing as denoted on the Tentative Map, and not of <br />the entire subject property. <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 Onsite <br />Wastewater Treatment Systems (OWTS) Standards have been employed for the purpose of preparing <br />this study. Therefore, no guarantee or warranty is expressed or implied concerning any aspect of this <br />investigation, the prevention of environmental impact, or related issues. <br />If there should be any questions regarding the information contained within this report, please <br />contact the undersigned. <br />Respectfully submitted, <br />CHESNEY CONSULTING <br />Don Chesney, PE <br />Registered Civil Engineer #C75479 <br />Page -5- <br />Chesney Consulting