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March 2014 <br />Mill MLGW -7 Groundwater Quality Assessment + 2 <br />Henderson also performed a trend analysis on this pH data and the results did not appear to <br />be anomalous, or obvious outliers. Per the GWMP, the monitoring frequency at MLGW -7 <br />for pH was assessed and increased from triannually to monthly in September 2013 to better <br />evaluate pH trends and the underlying water chemistry that may be causing low pH values at <br />this location. <br />1.2 OBJECTIVES <br />This Technical Memorandum fulfills the commitment of providing the results of the <br />additional sampling at MLGW -7 and summarizes both these recent and historical water <br />quality data in order to evaluate the potential causes of reduced pH which can then be <br />utilized to guide further monitoring and /or develop a mitigation plan, as appropriate. <br />AJAX Ltd ♦ 28828 Cedar Circle ♦ Evergreen, CO 80439 ♦ (303) 241 -2057 <br />Clear Creek Associates+ 6155 E. Indian School Rd. + Scottsdale, AZ 85251 + (480) 659 -7131 <br />