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New Moose Lodge Nitrate Loading Study Page 2 of 7 <br /> Our Project Number: E07175A <br /> November 5, 2007 <br /> The method takes into account the development area, soil denitrification factor, rainfall volume, <br /> rainfall nitrate concentration, waste effluent quantity, and waste effluent nitrate concentration. <br /> The formula, assumptions and calculations used for the analysis are shown on Plates 9 and 10. <br /> The units of nitrate used in the mass balance equation are nitrate-N, whose maximum drinking <br /> water contaminant level is 10 mg/L. <br /> 1.0 CHEMICAL AND PHYSICAL PROPERTIES OF SOIL <br /> 1.1 Chemical and Physical Soil Properties <br /> For a discussion of on-site soil properties, refer to Section 5 of the SSS. <br /> 1.2 Mass Transport Soil Properties <br /> The percolation tests have revealed that the soils are fairly permeable. These soils will allow <br /> moderate infiltration of water through the surface soils. The longer the effluent remains near <br /> the surface, the more treatment is enhanced due to natural processes within the soil. If the <br /> permeable soils exist to the depth of the ground water table, it is possible that surface <br /> contaminants may be transported fairly rapidly. <br /> 2.0 GROUND WATER ANALYSIS <br /> 2.1 Regional Ground Water <br /> A discussion of regional ground water, including depth to ground water and directional ground <br /> water gradient, is included in Section 4.1 of the SSS. No significant seasonal trends were <br /> evident from the maps consulted. <br /> 2.2 Potential Ground Water Contamination Issues <br /> A discussion of issues related to potential ground water contamination is included in Section 4.2 <br /> of the SSS. <br /> 2.3 Current and Future On-Site Ground Water Uses <br /> There is currently one agricultural well on the site, as noted in Section 4.3 of the SSS. A new <br /> well will be developed as part of the project, and ground water will be used on the site in the <br /> future. It is anticipated that the project will be considered a Public Water System. <br /> 3.0 SOURCES AND IMPACT OF NITRATE TO GROUND WATER <br /> 3.1 Current Off-Site Sources of Nitrate <br /> Septic systems, agriculture, and dairies in the area may be the most significant sources of <br /> nitrate in ground water. Septic tank use in the vicinity is discussed in Section 3.4 of the SSS. <br /> '-44 <br /> 902 Industrial Way-Lodi,CA 95240.209.367.3701 -Fax 209.369.4228 ©2007 Neil O.Anderson&Associates,Inc <br />