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I <br /> August 22, 2007 <br />` NOA Project Number: E07109A <br /> ! _7 <br /> 2.0 GROUND WATER ANALYSIS <br /> Fil 2.1 Regional Ground Water <br /> A discussion of regional ground water is included in Section 6 of the SSS/NLS. (Kleinfelder, 2007)/---- <br /> A <br /> 007)A groundwater boring was drilled by our office on July 3, 2007. Groundwater was encountered at <br /> approximately 7.5 feet. <br /> I <br /> 2.2 Potential Ground Water Contamination Issues <br /> Potential ground-water contamination can occur from a number of sources which often include <br /> F, leaky underground storage tanks, agricultural activities, dairies, septic systems, and storm water <br /> infiltration. Any past agricultural activities, dairies, storm water infiltration and the present use of <br /> Fseptic systems in the area should be considered potential ground-water contamination sources. <br />{ <br /> 2.3 Current and Future On-Site Ground Water Uses <br /> Fi The use of groundwater for drinking water and possibly landscaping is planned for the proposed <br /> development. <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 nitrate in <br /> { the county. In an attempt to determine the septic system density for the vicinity of the site, our <br /> �- office reviewed a recent aerial photograph of the subject property available from GoogleEarthTm. <br /> We counted the building clusters within one square mile of the site, and made the assumption that <br /> each building cluster has one septic system. Using this method,we determined that there are a <br /> minimum of 30 septic systems per square mile in the immediate vicinity of the site. <br /> The general use of the vicinity is farmland. There is low residential use in the area. The onsite water <br /> - well was tested for nitrate and DBCP. The results of these tests are reported in S S. <br /> (Kleinfelder, 2007). Kleinfelder found the well water test results for Nitrate w e0 mg/L, hich is <br /> equal to the EPA maximum level of contamination for drinking water standards. e well as also <br /> tested for DBCP. The results were found at 0.01 ug/L,below the maximum contaminant level of <br /> i 0.2 ug/L. <br /> 3.2 Contribution of Rainfall <br /> F F <br /> Please see section 9 of the SSS/NLS (Kleinfelder, 2007) for details regarding rainfall. <br /> Fi 5 <br /> F1 <br />