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MW-6113 Groundwater was found to be <br /> contaminated by MTBE,during last <br /> sampling event that occurred during the <br /> period of active GWE. <br /> Variance requested to be allowed to destroy Well is located on Star Street in the <br /> well by pressure grouting due to: parking lane, out of the main traffic lane, <br /> Visibility is good along the street in both <br /> Traffic safety, 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 /> Trend analysis shows MTBE will not be Trend analysis is based on data collected <br /> detected in MW-6B water samples after during GWE,and may not be applicable <br /> October 2012. to natural conditions. <br /> Nearby extraction well EW-8A had 5 <br /> micrograms per liter of MTBE when it <br /> was last sampled;therefore, MW-6B is <br /> probably not ND.The wells had one pair <br /> of contemporaneous sampling results as <br /> shown below, concentrations are in <br /> micrograms per liter: <br /> Pi2j. <br /> EW-8A MW-6B <br /> 8/2010 9 93 <br /> The EHD concludes that there's a <br /> reasonable probability that MTBE <br /> contamination remains in the area <br /> around MW-613. <br /> Page 5 of 9 <br />