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LOGE 1516: Stonum Vineyards NLS Addendum Page 8 <br /> August 11, 2015 <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Based on the proposed uses reported, the use of on-site septic tanks and drain field systems on <br /> the Site is not expected to cause a buildup of nitrate in the aquifer above 3.44 mg/L-N. This <br /> level falls below the US EPA drinking water recommendation of 10 mg/L-N. In fact, the actual <br /> impact to the aquifer will be much less since the nitrate loading equation is conservative and <br /> overestimates impacts. <br /> We believe the Site suitable for development with the use of standard septic systems. We do <br /> not anticipate that the ground water quality will be negatively impacted, and no nitrate mitigation <br /> is recommended. <br /> Sincerely, <br /> Live Oak GeoEnvironmenfal, Inc. <br /> `Ile <br /> Abigail acco, Environmental Professional <br /> o��sg\ONAL �iFo�O <br /> 4Q DAVID J.WELCH ul <br /> * N0.2151 <br /> David Welch, Engineering Geologist CERTIFIED <br /> CEG-2151, CHG-653, PGP-1049ENGINEERING <br /> GEOLOGIST P <br /> OFCALIF <br />