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Ms. Erica Czosby <br />Mach 3Q, 2007 <br />Page 7 <br />Monitoring Approximate Targeted <br />Well/ Diameter, Depth, feet Lithologic Comments <br /> inches <br />Piezometer b s Unit <br /> Intended to monitor <br />P-002 1 15 ibfined area potential leakage out <br /> Backfill of Feeder Canal. <br /> Intended to mottitox <br />P-003 1 25 Dlined area leakage out of <br /> Backfill Feeder Canal. <br /> Unconsolidated Intended to monitor <br />P-004 1 <10 surficial potential leakage out <br /> of Swede Ditch <br /> Unconsolidated Intended to monitor <br />P-005 1 <10 potential leakage out <br /> surficial <br /> of Swede Ditch <br /> Intended to monitor <br />P-006 1 <10 Unconsolidated potential leakage out <br /> urf cial <br /> of Swede Ditch <br />CEM-001 4 141.5 Fort Hays Existing monitoring <br /> Limestone well <br /> To evaluate if shale <br />CEM-002 2 80 Smokey Hill around C-Pit <br /> Shale <br /> transmits water <br /> Smokey Hill To evaluate if shale <br />CEbf-003 2 80 Shale around C-Pit <br /> transmits water <br /> To evaluate <br />CEM-004 2 20 St. Vrain potential water <br /> Alluvium movement from C- <br /> PIC t0 nOCC}l <br /> Compliance Well, <br /> Fort Hays down dip from <br />CEM-005 4 450 <br /> Limestone CEM-0Ol at east <br /> _ _ -. _ -- pr~ert~line <br />All wells will be notified fox construction and permitted with the Colorado State Engineer <br />office following the required procedures of the Division of Water Resources. <br />Depending upon the field observation of depths to water at the various locations outlined <br />above, Brown and Caldwell may install up to six data loggers to automatically record water <br />level data during the critical early stages of the program while C-Pit is being filled and the <br />irrigation ditches start to flow. <br />Task 4.0 Sampling and Malysis <br />In accordance with applicable DRMS regulations for mining operations, groundwater <br />quality samples will be collected from all C-Pit monitoring wefts that are found to produce <br />water. Prior to purging and sampling of monitorutg wells, groundwater elevations will be <br />measured using an electronic water level indicator. Readings will be referenced to the top <br />of casing of each monitoring well. The water level meter will be rinsed with distilled water <br />between each location. <br />-05946S6.doc <br />