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<br />l• <br />resaturating. Installation of an additional ash monitoring well <br />(AMW-2) was made in 1988 with the approval of Minor Revision #8. <br />The location of the well is down gradient of ash materials with <br />respect to the anticipated direction of subsurface water flow once <br />reclamation is complete. originally all wells were subject to <br />monthly sampling and a full suite of chemical parameter testing, <br />including heavy metals such as zinc, barium, arsenic, mercury, <br />cadmium, aluminum and copper. With the approval of Technical <br />Revision #19 these were dropped from the required list of tested <br />chemical parameters and only a quarterly sampling was required. <br />In addition Stipulation #22 states that ground water quality <br />samples must be collected from adjacent landowners to the north of <br />the Keenesburg Mine site prior to disposal of ash at the mine site. <br />Ground water data must be submitted to the Division within 30 days <br />following laboratory analysis. Water samples must be analyzed for <br />all parameters during the paste extract analysis of ash samples. <br />Water quality sampling of subsurface water is taken from wells SMW- <br />1, AMW-1, FPW, 96 and 122 and are sampled quarterly. AMW-2 remains <br />dry. Parameters studied are: <br />Calcium - dissolved <br />Iron - dissolved <br />Magnesium - dissolved <br />Manganese - dissolved <br />Molybdenum - dissolved <br />Sodium - dissolved <br />alkalinity, total (as CACO3 to pH 4.5) <br />Carbonate (as CO3) <br />Hardness (as CACO3) <br />Bicarbonate (as HCO3) <br />pH (pH units) <br />Specific conductance (mmhos/cm) <br />Lead - dissolved <br />j,selenium - dissolved <br />Total dissolved solids (at 180 degrees C) <br />Chloride <br />Sulfate (as SO4) <br />SAR <br />