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i = <br /> i <br /> TABLE 4 <br /> Summary of Historical Groundwater Monitoring Data and Analytical Results <br /> Former Thiemann's Service <br /> (Page 7 of 7) <br /> Date Well ID Wellhead Depth to Water GW Benzene Toluene Ethyl- Total TPHg MTBE <br /> Elevation Elevation Benzene Xylenes <br /> Elevation in feet Concentration in pg1L <br /> 02/01/01 MW-6 9831 2471 7360 ND ND ND ND ND ND*** <br /> 05/22/01 MW-6 9831 2596 7235 ND ND ND ND ND ND <br /> 01/11/02 MW-6 9831 2727 7104 ND ND ND ND ND ND <br /> 04/24/02 MW-6 9831 2703 7128 ND ND ND ND ND ND <br /> 07/10/02 MW-6 9831 2738 7093 ND ND ND ND ND ND <br /> 10/09/02 MW-6 9831 2799 7032 ND ND ND ND ND ND <br /> 01/29/03 MW-6 9831 2640 7191 ND ND ND ND ND ND <br /> 04/14/03 MW-6 9831 2624 7207 ND ND ND ND ND ND <br /> 07/10/03 MW-6 9831 2649 7182 ND ND ND ND ND ND <br /> i <br /> Notes <br /> pgIL(ppb)= micrograms per liter(parts per billion) <br /> GW = Groundwater <br /> TPHg = Total Petroleum Hydrocarbons as Gasoline, <br /> Analyzed by Modified EPA Method 8015 <br /> MTBE = Methyl Tertiary Butyl Ether <br /> ND = Not Detected <br /> NA = Not Analyzed <br /> NS = Not Sampled <br /> Dup = Duplicate Sample Submitted to Another Laboratory for Analysis <br /> = Elevated detection limit due to dilution needed to quantify elevated concentrations <br /> All Wells resurveyed on 10/30/97 <br /> Samples analyzed by EPA Method 8260 TBA, DIPS,TAME, and ETBE were also analyzed and reported as nondetectable <br /> SlEnvtronmental162605\tableslpump test(feasibility study)tables1istoncal GW summary doc <br />