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site itself, general ground water flow patterns in the vicinity of the site <br />appear not to have been significantly changed (or interrupted) by the past <br />coal mining activities, or by the ongoing ash disposal work. <br /> <br />I • <br />Six ground water monitoring wells were sampled by CEC on a quarterly <br />basis in 2003. These wells are designated AMW-1, AMW-2, DH-96, DH- <br />122, FPW and SMW-2. Water quality analysis includes both the fieldwork <br />and the analytical laboratory testing of water samples collected from these <br />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 is <br />determined using a temperature probe placed in each sample as soon as it is <br />collected. Specific conductance is also obtained using an electrical <br />conductivity meter. Each field water sample is tested for pH against a <br />baseline pH neutral solution (7.0), once the meter adjusts to the water <br />temperature of the sample. All data collected during field-testing is <br />recorded in the field logbook, which is kept at the Keenesburg Mine office. <br />A graphic display of the information for each well (for the most recent five- <br />year period) can be found in a subsequent section of this Report, "Analysis <br />of Water Sampling Field 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 2003 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) has shown continued signs of recharge since <br />the A-Pit reclamation activities were concluded. This has been a trend since <br />the end of 1999 when A-Pit reclamation was complete. Water was found in <br />this well during each of the quarterly samplings for 2003. Samples were <br />obtained for both field testing and laboratory analysis, but the "purge <br />procedure", while improved over the previous sampling, must be described <br />as marginal since the well "goes dry" about half way through the purge <br />cycle, and is slow to recharge. The well is located near the northeast edge <br />of A-Pit, in a highly disturbed and subsequently reclaimed overburden area, <br />which is likely impacting the ability of this well to recharge. <br />AHR-2003 -52- <br />