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__ Strip Mine operation, or 2) the subsequent reclamation activities (which <br />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 <br />the 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 />While they have been altered within the Keenesburg Mine site itself, general <br />groundwater flow patterns in the vicinity of the mine appear not to have <br />been significantly changed (or interrupted) by the past coal mining <br />activities, or 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 2007. 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 measurements: <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. These samples are collected and analyzed <br />both before, and after the appropriate well purge operations are conducted. <br />All data collected during field-testing is recorded in a field logbook that is <br />kept at the Keenesburg Mine office. A graphic display of the information <br />for 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 2007 this sequence was: (1) FPW, <br />(2) AMW-1, (3) DH-96, (4) DH-122, (5) AMW-2 and (6) SMW-2. Ash <br />Monitor Well No. 2 (AMW-2) continues to show signs of recharge since the <br />A-Pit reclamation activities were concluded. This has been the trend since <br />AHR-2007 -49- <br />