Laserfiche WebLink
U-Haul#709-50 <br /> Preliminary Site Conceptual Model Slaes Environmental <br /> December i5,2006 <br /> i • Benzene The lateral extent of benzene in groundwater in the shallow (B) zone and deep (C) zone <br /> appears to be defined by monitor wells MW-5(B&C), MW-8(B&C), MW-IO(B&C), MW-1 I(B&C), <br /> MW-12(B&C), MW-13(B&C), MW-14(B&C), and soil boring DP-9 Although 084 ppb benzene <br /> was detected in monitor well MW-I IC in September 2006, it is probable that the lateral extent of <br /> benzene in the deep (C) zone to the west of the U-Haul site is near the location of MW-1 IC based on <br /> the low benzene concentration <br /> • 1,2 DCA The lateral extent of 1,2 DCA in groundwater in the shallow (B) zone appears to be <br /> largely defined by monitor wells MW-5B, MW-I OB, MW-I IB, MW-12B, MW-13B, MW-14B, and <br /> DP-9, however, 0 76 ppb 1,2 DCA was detected in monitor well 1 IB in September 2006 The lateral <br /> extent of the majority of the mass of 1,2 DCA in groundwater in the deep (C) zone appears to be <br /> Iargely defined by monitor wells MW-5C, MW-8C, MW-IOC, MW-I I C, MW-12C, MW-13C, <br /> MW-14C, and soil boring DP-9, however, concentrations of 1,2 DCA ranging from 0 8 in DP-9 to <br /> 4 4 ppb and 9 I ppb in MW-13C and MW-11C, respectively were detected in the deep (C) zone <br /> toward the northwest, west, and southwest from the U-Haul site It should be noted that <br /> concentrations of 1,1 DCA, dibromomethane, dibromochloromethane, and bromodichloromethane, <br /> • were detected above laboratory reporting limits in groundwater samples collected from DP-9 in <br /> March 2006 These constituents have not been detected in groundwater samples collected from the <br /> U-Haul site, therefore, the impacted groundwater encountered in soil boring DP-9 may be from <br /> another source such as the Former Harry's Auto site located to the east of Frontier Motel <br /> Page 23 <br />