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LOGE 20-24: Murray Trailers SSNLS Addendum Page 2 <br /> August 6, 2020 <br /> The details of the nitrate loading calculation are included in the attached plate. The results of the <br /> calculation are presented in the following table. <br /> Result of Nitrate Loading Calculation <br /> Variable Value Units Description <br /> Nc 6.3 mg/L-N Long-term average concentration of percolating effluent <br /> The US EPA recommended MCL for nitrate in drinking water is 10 mg/L-N. In a worst-case <br /> situation, the maximum buildup of nitrates in the aquifer from the use of septic systems on the <br /> Site is predicted to be 6.3 mg/L-N. <br /> Discussion of Nitrate Loading Results <br /> Total Nitrate Impact <br /> Based on the method and assumptions described, the result of the nitrate loading estimate <br /> indicates that the proposed development on the Site should not cause a buildup of nitrates in <br /> the aquifer above 10 mg/L-N. <br /> Conclusions <br /> Based on the methods and assumptions described, the nitrate loading calculation indicates that <br /> the use of on-site septic tanks and drain field systems on the Site has the potential to cause a <br /> buildup of nitrate in the aquifer up to 6.3 mg/L-N, well below the MCL of 10 mg/L-N. <br /> Sincerely, <br /> Live Oak GeoEnvironmental, Inc. <br /> NALNAL GF�� <br /> Abigail acco, Project Manager <br /> DAVID J.VkLCH `P� �� DAVID J.WF1Ctii <br /> N0.2151 * NO 853 <br /> * CERTIFIED * CER11M <br /> ENGI':EERiNG HYDROGEN <br /> GEOLOGIST �P <br /> David J. Welch, CEG, CHG, PGP OFCA1-�F� �pFCp,L1�"' <br /> CC: Vito Bavaro <br /> 26319 Magnolia Rd. <br /> Escalon. CA 95320 <br /> Attachment: Nitrate Loading Calculation <br />