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<br />TABLE 15-7 <br />Ground Water Quality Monitoring Procedures <br /> Yoast Mine <br /> Well <br />Map Computer Depth Casing Purging/Sampling Minimwi~ Purge Purge <br />Number Number Formation Ift) Dia. lint Device Volume (gal) Rate <br />YSAL1 ~ (WD0117) Sage Creek Alluvium 31.0 4 Bailer or pump 30 1 gpm <br />WSAL3~ IWD03171 Sage Creek Alluvium 26.6 2 Bailer or pump 25 1 gpm <br />YSALB IWD08171 Sage Creek Alluvium 19.3 4 Bailer or pump 2 <.5 gpm <br />YSAL12~ IWD12171 Sage Creek Alluvium 30.5 4 Bailer or pump 45 1 gpm <br />YAAL14 (WD52131 Armand Tributary Alluvium 22.3 4 Sub Pump3 10 .5 gpm <br />YGAL15 (WD53131 Grassy Creek Alluvium 12.5 4 Bailer or pump 5 .5 gpm <br />YGAL16 (WD5413) Grassy Creek Tributary 28.7 4 Sub Pump 15 .5 gpm <br /> Alluvium <br />YGAL17 IWD55131 Grassy Creek Tributary 27.4 4 Sub Pump 15 .5 gpm <br /> Alluvium <br />YGAL18 IWD56131 Grassy Creek Tributary 48.6 4 Sub Pump 15 .5 gpm <br /> Alluvium <br />YOV1 (WD24051 Wadge Overburden 54.3 4 Sub Pump 15 .5 gpm <br />YW2 iWD2507) Wadge Coal 58.5 2 Flowing/Bails 5-10 N/A <br />YLOV3 IWD26121 Lennox Overburden 47.0 4 Flowing/Bail N/A N/A <br />YL6 IWD29161 Lennox Coal 53.7 4 Flowing/Bail N/A N/A <br />YOV9 (WD3205) Wadge Overburden 135.0 4 Sub Pump 7.5 .5 gpm <br />YW23 (WD19071 Wadge Coal 102.7 4 Sub Pump 10 .5 gpm <br />YWU28 (WD4308) Wadge Underburden 383.5 4 Bailer or pump 40 2 gpm <br />YW28 (WD42071 Wadge Coal 323.0 4 Bailer or pump 70-80 3 gpm <br />WOV28 IWD41051 Wadge Overburden 305.0 4 Bailer or pump 65 2 gpm <br />YWU29 IWD46081 Wadge Underburden 303.9 4 Bailer or pump 60 2 gpm <br />YW29 IWD45071 Wadge Coal 259.0 4 Bailer or pump 33 2 gpm <br />YOV29 (WD44051 Wadge Overburden 221.0 4 Bailer6 3 N/A <br />YWU30 (WD4908) Wadge Underburden 261.0 4 Bailer or pump 15 1 gpm <br />YW30 IWD48071 Wadge Coal 208.0 4 Sub Pump 7.5 7.5 .5 gpm <br />YOV30 IWD4705! Wadge Overburden 141.0 4 Sub Pump 5-10 .5 gpm <br />YWC31 (WD50091 Wolf Creek Coal 108.0 4 Sub Pump 15 .5 gpm <br />1 Volumes approximate, based on sampling history ~ Walk-in Access <br />2Sample periods -May-June; October-November; August (nine alluvial wells only) <br />3Use submersible pump, variable rate li.e., Grundfos "Redi-Flo"1 <br />4Use bailer at all times <br />58ai1 when flow rate insufficient, collect sample in consistent manner when flowing <br />6Normally dry, use hailer when sufficient water present <br />19 <br />