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include both the ash and the mine waste rock disposal operations). While <br />questions may have appeared with respect to specific analytes in certain <br />wells (manganese in SMW-2 for example), overall parameters are within the <br />scope of what should be considered acceptable. Results that are at issue <br />likely.reflect the recharge of the groundwater through the disturbed soils/ <br />spoils as opposed to one of the aforementioned activities. <br />Although altered within the Keenesburg Mine site itself, general <br />groundwater flow patterns in the vicinity of the site appear not to have been <br />significantly changed (or interrupted) by the past coal mining activities, or <br />by the ongoing ash disposal and mine reclamation. <br />The six ground water monitoring wells were sampled by CEC on a quarterly <br />basis during 2005. These wells are designated AMW-1, AMW-2, DH-96, <br />DH-122, FPW and SMW-2. Water quality analysis includes both the <br />fieldwork and the analytical laboratory testing of water samples collected <br />from these wells. <br />Field measurement: <br />Static water level is a tape measurement from the top of the well casing (a <br />known ground elevation) to the current water level in the well. This <br />measurement is taken after a visual inspection of the area surrounding the <br />well, and precedes any sampling activity. Water sample temperature, <br />specific conductance and pH are determined using a probe placed in each <br />sample as soon as it is collected. Samples are collected and analyzed both <br />before and after the appropriate well purge operation is conducted. All data <br />collected during field-testing is recorded in the field logbook, which is kept <br />at the Keenesburg Mine office. A graphic display of the information for <br />each well (for the most recent five-year period) can be found in a <br />subsequent section of this Report, "Analysis of Water Sampling Field <br />Data". <br />Laboratory analysis: <br />The wells are sampled in a sequence that follows the order of least to <br />greatest level of salinity. At the end of 2005 this sequence was: (1) FPW, <br />(2) AMW-l, (3) DH-96, (4) DH-122, (5) AMW-2 and (6) SMW-2. Ash <br />Monitor Well No. 2 (AMW-2) continues to evidence signs of recharge since <br />the A-Pit reclamation activities were concluded. This has been a trend since <br />the end of 1999 when the A-Pit reclamation was complete, but only recently <br />AHR-2005 -57- <br />