Laserfiche WebLink
1 iCLE/NFELDER I <br /> The gradient of the deep , "main" aquifer was calculated between wells DP- 1 and DP-3 using a <br /> "3-point analysis . " During both quarterly monitoring events , flow direction in the deep, "main" <br /> aquifer was to the southwest at a gradient of 0. 003 feet/foot, consistent with the San Joaquin <br /> Flood Control and Water Conservation District data cited in this report, and with Kleinfelder's <br /> site-specific historical data. For additional historical information regarding the depth-to- <br /> groundwater and corresponding groundwater elevations, please refer to Table 7 in the <br /> Appendices. Groundwater contours for the monitoring event are included as Plate 3 . <br /> During the fourth quarter 2012 , Nitrate as N was detected in each of the three deep <br /> groundwater samples at concentrations ranging from 1 . 3 mg/I (DP-1 ) to 6 . 6 mg/I (DP-2) . The <br /> results are shown in Table 8. <br /> The results of the groundwater analyses were generally consistent with historical results. The <br /> pattern of nitrate concentration distribution relative to the deep aquifer flow direction appears <br /> to indicate that the highest nitrate concentrations exist north (upgradient) of the nursery. <br /> Nitrate as N concentrations in the upgradient location (DP-2) have been increasing overtime. <br /> For additional information regarding the results of chemical analysis, please refer to the <br /> laboratory data sheets in Appendix C or the summary of the results of the analyses included as <br /> Table 8 in the appendices of this report. Table 9 shows historical concentrations of nitrates <br /> (converted to nitrates as NO3) in the following wells , which draw water from the deeper <br /> aquifer: <br /> Norman 's Nursery Old Main Well (now the backup irrigation well) <br /> Norman's New Main Well (irrigation ) <br /> • Dodge Well <br /> • Eason Well <br /> Barbagelata Irrigation Well <br /> • Norman's DP- 1 <br /> Norman's DP-2 <br /> • Norman's DP-3 <br /> The sampling of the offsite wells has at times been conducted by the Stockton East Water <br /> District (SEWD) and nearby neighbors . Kleinfelder has not been provided with any results by <br /> SEWD or others since the December 18, 2000 SEWD sampling . Kleinfelder has conducted <br /> the sampling of the three onsite deep aquifer monitoring wells . The sampling of the onsite <br /> 117226. E02/ST013R0176 Page 24 of 40 January 31 , 2013 <br /> Copyright 2013 Kleinfelder <br /> I <br />