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C-PIT Hydrogeologic Investigations <br />Technical Revision No. 8 <br />4: Conclusions Mining Permit M-1977-208 <br />• C-Pit receives water from multiple sources, including incident precipitation, upslope Canal and ditch <br />seepage, seepage out of the pond located southwest of C-Pit, leakage out of process piping systems such <br />as the A-Pit water line and the C-Pit sprinkler line, and from direct application by dust suppression <br />spraying. <br />• Field investigations were not able to quantify the contributions from the various sources of inflow to C- <br />Pit The changing site hydraulics due to the rapid rise in C-Pit water during the pit backfilling process, <br />combined with the practical lutvts of quantifying relatively low flow rates, prohibited such a <br />determination. <br />Groundwater elevation data collected in the C-Pit area were not adequate to construct a water surface <br />contour map. Inconsistent data from the piezometexs to the west of C-Pit do not provide a sound basis <br />to map a water surface in this location. The piezometexs were either consistently dry, intermittently dry, <br />or at most only showed a few inches of saturation along the top of the Caxlile Shale. The monitoring <br />wells to the west of C-Pit indicate that the bedrock units in this area do not have a uniform water table, as <br />CEM-001 and CEM-003 show some connection to C-Pit, while CEM-002 remains dry. See Table 1 for <br />details. <br />43 <br />Use of coolants on this sheet is sub]ect to the Ilmrtetions speaLed at the end of this document. <br />\1BCDEN02\projectslDelafGEN\CemexlTR-e\Reponing\CEMEX Report 0&31-0zdoc <br />