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;141U Stat Perfs <br />FIGURE 1 <br />TYPICAL GROUND WATER MONITORING HOLE COMPLETIONS <br />Overburden <br />4' sch. 40- pvc <br />Grout • O. to .5.ft. <br />Cuttle15: <br />air .Ben*onite pott•• <br />OVERBURDEN <br />COAL ZONE <br />LDx COAL <br />UNDERBURDE.N <br />Coal Zone <br />4 50% 4vc. <br />• . <br />Bentonite...pettet5 <br />Ca <br />Mitt Sot Prf-s <br />Underburden <br />4' =11,, 40 pvc <br />, ■■•••■•■,••■•■1.. <br />Grout...0 <br />to .5- ft, <br />tutting <br />• Mal Stat. Peri- <br />. . • <br />