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Figure 15• General Well Construction Schematic (not to <br /> scale) for Overburden and Alluvial Monitoring <br /> Wells Drilled During 1986*, Nucla and Nucla <br /> East Minesy Montrose County, Colorado <br /> End cap (vented) <br /> n fa <br /> Cement (type II) <br /> Medium Sand (�V <br /> •'• ' on top of gravel <br /> . ' : •• <br /> •.• •. • • . 4"id pvc sch 40 <br /> bellend <br /> ••• . •. <br /> Pao," • .• <br /> • ' •°4 6 3/4" bore hole <br /> •. . •• <br /> Alluvium or = le ;• 0.02 or 0.05 mill- <br /> Dakota Coal •' • = slot 4"id pvc sch <br /> Overburden •;:•• _ •:;; 40 throughout sat- <br /> urated zone <br /> <3/8" pea gravel <br /> within 5' of ground <br /> •.•; — .;.°• surface <br /> • •• • •• <br /> • ' • • . • <br /> • <br /> Bottom cap <br /> * Schematic is pertinent to wells GW-N15, GW- <br /> N18, GW-N18P1, GW-N21, GVJ-N22 <br /> 71 <br />