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I were performed. Aquifer test data is found in Appendix 7-3, Tab 7. Ground water levels are <br />measured with an electronic water level indicator. Water levels in some shallow alluvial wells are <br />measured directly with a steel tape. <br />Five wells were completed in 2001. These W-24 series wells (see Table 15-2) monitor the Sage <br />Creek/Wolf Creek overburden, coal and underburden. These wells failed in a landslide that <br />occurred in the spring of 2003. The well casings were all bent below ground surface (at around <br />twenty feet deep). This prevented abandonment of these wells by normal methods. In October <br />2003, a gravel trench drain was established around these wells to direct water flow from the <br />broken well casings away from the toe of the Pond 016A dam. In 2005, an attempt to abandon <br />these wells will be made. The plan is to pull the steel surface casings with a crane or backhoe. <br />Then cement will be poured down the hole until the hole is full. <br />In September 2004, replacements for the W-24 series wells were completed. Details for these <br />W-25 series replacement wells are provided here in Table 15-2 and in Appendix 15-3A. In <br />addition, well completion diagrams and lithologic logs may be found in Tab 7, Appendix 7-1. <br />Ground Water Quality Sample Handlino. Preservation. and Analysis. The ground water parameter list <br />rs contained in Appendix 15-2 (Pre-October, 1991 Hydrologic Monitoring Program). The types of <br />samples, preservatives, and bottles used in the monitoring program are contained in Appendix 15-1. <br />Raw/non-acidified and/or raw acidified water samples are taken from the sampling site and placed <br />into specially prepared sample bottles. Dissolved constituent samples are filtered in the field with a <br />0.45 micron membrane filter. Water samples are chilled by packing the bottles in iced coolers, and <br />then they are promptly taken to an EPA certified laboratory for chemical analysis. <br />All water samples are field tested for pH, temperature, and electrical conductivity a[ the time they are <br />collected. The pH meter is calibrated before each day's use by performing atwo-point calibration <br />using pH 7.0 and 10.0 buffer solutions. Single point calibration checks are performed in the field. <br />Conductivity meter calibrations are routinely verified using potassium chloride solutions varying in <br />strength from 1000 up to 3000 umhos/cm, depending on [he availability of the solutions from select <br />vendors. Field conductivities reported prior to the end of water year 1989 are not temperature <br />compensated. Peabody acquired a new conductivity meter with an automatic temperature <br />compensation probe as of October, 1989. The new conductivity meter is calibrated before each day's <br />use. Sampling protocol is reviewed and maintainetl in a systematic fashion that delivers reliable data. <br />Peabody will continue to implement improvements in sampling protocol to minimize errors affecting <br />field chemistry measurements and sample collection. <br />TR-52 11 Revised 03105 <br />