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a <br />4000 <br />3500 <br />3000 <br />W <br />1 <br />2500 <br />rn <br />E <br />W <br />Q 2000 <br />J_ <br />~ 1500 <br />1000 <br />500 <br />0 <br />• • <br />119741197511976119771197811979119801198111982 119831198411985 119861198711988 119891199011991119921199311994 11995119961 <br />YEAR <br />FIGURE B-18. SULFATE VERSUS TIME FOR WELLS GC-3, P-1, P-3, J-1 AND COY. <br />Q~'l, SNnLE QqL <br />P}/EATT AL~~rivn. <br />