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• <br />• <br />Lorencrro Cartron Afrrte- Grourtd~o~arer Techrtrcu[Rrporr <br />TABLE GW-6 <br />LORENCITO CANYON MINE <br />SUMMARY OF RESULTS FROM WINDMILLS <br /> <br /> <br /> <br />ite <br />Depth to <br />Water <br />(feet) <br /> <br />Temperature <br />°F <br /> <br />pH <br />(S.U.) <br />Specific <br />Conductance <br />(µmhos/cm) <br />Dissolved <br />Oxygen <br />(mg/L) Estimated <br />Total <br />Depth <br />(feet)' <br />WMCC1 NA Dry Dry Dry Dry NE <br />WMLPCI 10.30 77.7 8.96 1440 6.79 NE <br />WMPC1 NA 77.1 8.30 986 3.27 60 <br />WMBC1 NA Dry Dry Dry Dry 40 <br />WMBC2'' NA 78.2 9.63 1439 10.1 70 <br />WMBC3 22.45 Dry Dry Dry Dry 60 <br />WMCWCI NA 70.8 8.32 650 8.07 60 <br />WMCWC2Z NA 77.3 9.71 820 16.95 80 <br />NA- not accessible, no means of entry was available for the probe. <br />Depths are from personal communication with Sid Bayes, Ranch manager <br />= Water samples for [hese wells were obtained from the stock tank since no Flow was observed and no access was <br />available to [he well. <br />Results from the laboratory analyses was interpreted through the use of trilinear and Stiff <br />diagrams. These diagrams indicate principal cation and anion milliequivalents per liter and are <br />useful for determining water type. Copies of these diagrams are included in Appendix GW-3. <br />The principal water type observed in the windmills is a sodium bicarbonate type. This water is <br />typically neutral to partially alkaline, with low hardness, and low to moderate salinity. The pH <br />ranges from 8.32 to 9.71 and hardness ranges from 166 to 80 mg/L. Total dissolved solids in the <br />samples ranged from 660 to 800 mg/L (filterable residue). <br />All parameters required for analysis were compared with the Colorado Department of Health, <br />Water Quality Control Division The Basic Standards for Ground Water 3.11.0 (04/30/96), which <br />include and specify secondary drinking water standards, agricultural standards, human health <br />standards and total dissolved solids standards. In addition, sodium absorption ratios (SAR) and <br />conductivity measurements were compared to Mined Land Reclamation Division Guidelines, <br />"Division Procedures for the Assessment of Material Damage with Respect to Alluvial Valley <br />Floors, The Cumulative Hydrologic Impact Assessment, and Subsidence at Coal Mines (11/87)." <br />• The standards and maximums observed at a site which were exceeding are listed in Table GW-7. <br />GroundwaterA761Deccmber 9. 1996 19 <br />