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L <br />' ' screen for iron producing bacteria. Analytical results reported on September 14'" identified <br />the absence of iron, manganese, sulfate and slime-producing bacteria. <br />' Subsequently, in accordance with the ground water monitoring plan, BMRI, with the <br />' assistance of John C. Halepaska & Associates, Inc., prepared and submitted a response plan <br />to the Division on September 24, 1998 (i.e., 30 days following the date BMRI received the <br />' first verification results from the analytical laboratory) to address further evaluations that <br />BMRI proposed to conduct. These proposed evaluations included additional monitoring of <br />' other existing groundwater wells not previously monitored for water quality purposes and the <br />installation and analysis of new wells. These proposed additional well installations and <br />subsequent analysis was focused on further characterization and identification of the potential <br />' TDS source associated with monitoring well M-11R. A meeting of BMRI, Halepaska & <br />Associates, and Division representatives was held at the Division office on September 28'" to <br />discuss the proposed TR-15 Response Plan. <br />' As a result of the meeting and continued communications with the Division, BMRI initiated <br />further sample collections and water quality analysis of additional existing groundwater wells <br />' addressed within the response plan while the Division continued review of the plan. <br />Additional water quality samples were collected and analyzed from the West Pit compliance <br />monitoring wells, as well as the other monitoring sites not previously designated for on-going <br />monitoring for water quality purposes within or adjacent to the West Pit. These samples were <br />collected on October 1", 2n°, and 5'^ and the analytical results received October 12`" showed <br />' increased concentrations of TDS at monitoring well M-11R, as well as elevated TDS <br />concentrations at previously unmonitored wells BF-2 and PW-1. In addition, this monitoring <br />showed sulfate in excess of the value established as a compliance value for well M-11R. <br />These analytical results were submitted to the Division on October 20`". The table below <br />' presents the sample chronology and analytical results for monitoring well M-11R since the <br />initial July 8'" sampling. <br /> <br /> <br /> <br />2 <br />