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Rule 2: Permits <br />is <br />�J <br />Division approved termination of monitoring at sites MWJC -1, MWLC -1 and MWLC -2 <br />in 2009. <br />Table 2.05.6 -15 <br />LORENCITO CANYON MINE <br />GROUND WATER MONITORING PARAMETERS <br />Field Parameters <br />Analytical Parameters <br />Water Level <br />Total Alkalini <br />Temperature <br />Carbonate as CaCO3 <br />H <br />Bicarbonate as CaCO3 <br />Specific Conductance <br />Chloride <br />Sulfate <br />Calcium (dissolved) <br />Calculated Values <br />Iron total, total recoverable <br />Cation -Anion Balance <br />Magnesium dissolved <br />TDS ratio- measured/calculated <br />Manganese total and dissolved <br />Sodium Absorption Ratio <br />Potassium dissolved <br />Hardness <br />Sodium dissolved <br />Total Dissolved Solids TDS <br />H (laborato <br />Conductivity 25 ° C <br />Termination of Water Monitoring Plan <br />Prior to mining at LCM, Surface and Groundwater monitoring stations were established <br />and monitored from 1996 -2000. These sites were also monitored during mining from <br />2001 -2002 and after mining terminated in 2002, these sites continued to be monitored for <br />five years (2002 - 2008). This section compares pre- mining (1996 -2000) water sample <br />data with data collected post - mining (2002- 2008). <br />Coal bed methane (CBM) wells were and continue to be installed through out the region. <br />In the process of developing these wells, groundwater produced from the CBM <br />production target zones is discharged to surface waters. It is thought that these discharge <br />waters are the likely cause of changes in surface and alluvial groundwater quality within <br />the water monitoring area. The logic supporting this assertion is developed in the <br />sections to follow. <br />Surface Water <br />Surface water was monitored during the Pre and Post Mining periods along the <br />Purgatoire River and Lorencito Canyon Drainages. PRGTY -1 is the monitoring site <br />upstream from mining influence; PRGTY -2 is located downstream of the mine site and <br />just below the confluence with Lorencito Canyon. Table 2.05.6 -168 provides a <br />comparison of water quality collected Pre- Mining and Post - Mining for these two sites. <br />Likewise sites LC -2 and LC -1 are respectively located upstream and downstream of the <br />potential impacts from mining. This data is shown on Table 2.05.6 -16b. <br />TR -16 Page 2.05 -106 (Revised 10/27/09) <br />