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air sparging be continued in the second quarter Sparging into the deep extraction well should be <br /> successful as long as the water level remains high <br /> ' Although a groundwater sample was obtained from the deep extraction well and relatively high <br /> concentrations of contaminants-were reported, the results should be viewed with caution because of <br /> ' the high turbidity and unusual color of the sample More samples will be needed from this well to <br /> establish reliable values for groundwater contaminants <br /> ' The second quarter groundwater monitoring event should be scheduled for late May, when the water <br /> level is likely to reach its annual high In 1995, contaminant concentrations reached a peak in the <br /> second quarter in MW-5, and are likely to do so again because of the high water table Therefore, and <br /> in accordance with the revised sampling schedule approved by PHS/EHD, all wells should be sampled <br /> in May Samples should continue to be analyzed for TPH as gasoline and BTEX, but we recommend <br /> deleting MTBE from sampling protocol because it was not detected in the February samples <br /> 1 , <br /> 1 <br /> r _ <br /> i <br /> r <br /> 6 <br />