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MW-6C Groundwater monitored by this well has <br /> been ND for MTBE. This deeper-screened <br /> well passes through the contaminated <br /> water monitored by MW-613 and EW-813; <br /> therefore,the evaluation of issues <br /> related to MW-66 apply to well MW-6C. <br /> Variance requested to be allowed to destroy <br /> well by pressure grouting due to: <br /> Traffic safety, Well is located on Star Street in the <br /> parking lane, out of the main traffic lane. <br /> Visibility is good along the street in both <br /> directions; however, proper lane and <br /> traffic control protocols should be <br /> implemented to provide personnel <br /> safety. No unusually hazardous traffic <br /> conditions were noted. <br /> Business convenience, The work required for proper destruction <br /> of this well should not directly impact the <br /> convenience of local businesses or their <br /> customers. <br /> Interval through impacted zone has a grout The Nebraska Well Grout Study found <br /> seal between casing and impacted portland cement grouts do not adhere to <br /> groundwater. PVC plastic and a micro-annulus develops <br /> between the cement grout and the well <br /> casing,creating a vertical migration <br /> pathway for groundwater and any <br /> contaminants in the groundwater. <br /> EW_813 Well usually tested with MTBE <br /> contaminants. Last monitoring event, <br /> which occurred during active GWE,found <br /> MTBE contaminants. Due to the close <br /> location of MW-613,the justifications <br /> presented for MW-68 apply to this well. <br /> Variance requested to be allowed to destroy <br /> well by pressure grouting due to: <br /> Traffic safety, The well is located in the fire station <br /> parking lot and no unusual traffic hazards <br /> Page 6 of 9 <br />