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('KLE/NFELOER <br /> \` _ Blight People.Hight Sululluns. <br /> V <br /> 6.4 CONCLUSIONS <br /> The concentration of Nitrate found in the groundwater(1.8 mg/L)was well below the state drinking <br /> standard (10 mg/L). Even though the estimated waste/septic flow and nitrate concentration of the <br /> leach field effluent value used in our calculations are likely conservative, we estimate that the <br /> potential nitrate-nitrogen impact in groundwater resulting from the existing leach field should be <br /> minimal. This conclusion is based on the relatively deep depth to groundwater and the relatively <br /> small nitrate contribution from the existing system. <br /> Corral Hollow Creek is the nearest natural water body to the site and is approximately 1 mile south <br /> of the existing septic system. The Delta-Mendota Canal and the California Aqueduct are located <br /> approximately 0.75 and 1.25 miles southwest of the site, respectively. Because groundwater is <br /> relatively deep, and the topography is relatively flat, we anticipate that the potential for impact to <br /> surface water will be low. <br /> 20210068.001A/ST020R110989 Page 11 of 14 April 30, 2020 <br /> ©2020 Kleinfelder www.kleinfelder.com <br />