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22 ,p,-r 2009 <br /> AGE-NC-09-1683 <br /> Page 18 of 19 <br /> 9.6. IMPACT OF NITROGEN LOADING FROM SITE PROJECT <br /> Based on the low volume of wastewater to be generated and the significant depth to ground water, <br /> the potential vertical migration would not likely degrade the local ground water. <br /> 10.0:' TOTAL NITRATE IMPACT FROM PROPOSED PROJECT <br />+' Based on the assumptions of the report,proposed NO3_N mass of wastewater and the calculations <br /> of the NO3—Y loading predicted, the proposed development should not negatively impact NO3 N <br /> loading rates within the aquifer.The soil at the site appear to be adequate for nitrate degradation and <br /> proper leaching of wastewater. <br /> k <br /> 11.00 MITIGATION METHODS PROPOSED <br /> To mitigate any known or potential <br /> future impacts to soil andg round water from nitrate from <br /> proposed new development and increased septic usage,the following mitigation practices could be <br /> implemented: <br /> Properly and regularly maintain property septic systems; <br /> • Avoid use of bio-toxic chemicals (bleach etc.), <br /> • Maximize wastewater hold time where practical; <br /> • If re-location or expansion of leach fields becomes necessary, leach lines should <br /> include high organic substrates under and surrounding the lines installed. <br /> 12.0. CONCLUSIONS <br /> Based on the data collected and reviewed in this report,AGE concludes the following: <br /> • All proposed and approved septic system use and construction should follow the SJCEHD <br /> On-Site Waste Disposal Standards. <br /> • Site redevelopment is appropriate with existing and proposed septic systems. <br /> i <br /> I <br /> I <br /> i <br /> i <br /> i <br /> Advanced GeoEnvironmental,Inc. <br /> 1 <br /> 1 <br /> J <br />