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Lorencito Convart Mine - GrowdK•ater Terhnical ReOnrt <br />• <br />mines. Well site MW-4 also serves to determine the upgradient effect from the P3 mine. Well <br />site MW-5 was emplaced to determine the potential upgradient effect from the Pl and P2 mines. <br />• <br />TABLE GW-1 <br />LORENCITO CANYON MINE <br />SUMMARY OF GROUNDWATER MONITORING STATIONS <br />Station/Well Type Purpose <br />MWLC-I Alluvial/Surface Lorencito Canyon- Downstream Station <br />MWLC-2 Alluvial/Surface Lorencito Canyon- Upgradient of PI/P2 Boz Cut <br />MWLC-3 Alluvial/Surface Lorencito Canyon- Upgradient of P1/P2 Box Cu[ <br />Disturbance <br />MWLC-4 Alluvial/Surface Lorencito Canyon- Upgradient of Pl/P2 Under <br />Affected Area <br />MWJC-1 Alluvial/Surface Jeff Canyon- Downgradient of Surface Mine <br />MWPC-l Alluvial/Surface Puertecito Canyon- Downgradient of Surface Mine <br />MWBC-I Alluvial/Surface Bonita Canyon <br />MWCC-l Alluvial/Surface Chimney Canyon- Downgradient of R3 and R4 <br />Portals <br />MWAC-1 Alluvial/Surface Alamosa Canyon -Site Above Pl Undermining <br />CWC-I Alluvial/Surface Cow Canyon- Downgradient of All Disturbance <br />CWC-2 Alluvial/Surface Cow Canyon- Downgradient of RI and R2. Surface <br />Facili[ies <br />MW-1 <br />(Three Wells) OverburdeNCiruela/ <br />Interburden Upgradient of R1 and R2 <br />MW-? <br />(Three Wells) OverbutdeNCiruela/ <br />Interburden Downgradient of R1 and R2 <br />MW-3 <br />(Three Wells) OverburdeNCiruela/ <br />Interburden Upgradient of R3 and R4 <br />MW-4 <br />(Three Wells) InterburdeNPrimero/ <br />Underburden Downgradient of Pl Mine and upgradient of P3 <br />MW-5 <br />(Three Wells) InterburdeNPrimero/ <br />Underburden Upgradient of PI and P2 Mines <br />MW-6 <br />(Three Welts) InterburdeNPrimero/ <br />Underburden Downgradient of P2 Mine <br />Aquifer and potential water bearing zone depths were determined via drilling. Drilling was <br />performed utilizing a Midway 1500 drill rig. Air, water, and limited use of a foamer was allowed <br />for drilling Fluids. Prior to actual drilling, surface casing was installed. Each surface casing was <br />emplaced by first drilling a 12 inch hole to approximately 20 feet below grade (see construction <br />• diagrams) and subsequently installing a 10 inch conductor pipe. Cement was utilized to set each <br />Groundwater 175~December 9, 1996 2 <br />