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-.of <br /> Weldon Church Site Background Information <br /> Page 5 of 5 <br /> In 2007,with the exception of the March 2007 monitoring event, TPH-g and BTEX concentrations <br /> increased in well MW-4. Petroleum hydrocarbons had not been detected in well MW-1 for six <br /> consecutive quarters, however in June 2007 TPH-g and BTEX compounds were detected in well <br /> MW-1 at a concentration of 600 µg/1 (TPH-g), 54 µg/1 (benzene), 27 µg/1 (toluene), 8.4 µg/1 <br /> (ethylbenzene), and 94 µg/1 (xylenes). During the October and December 2007 monitoring events <br /> petroleum hydrocarbons were not detected in well MW-l. <br /> Petroleum hydrocarbons had not been detected in well MW-3 since sampling began in July 1996, <br /> however during the December 2007 monitoring event TPH-g was detected at a concentration of <br /> 100 µg/1. <br /> Advanced GeoEnviron mental,Inc. <br />