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<br />i • <br />1800 <br />1600 <br />1400 <br />1200 <br />rn <br />~ 1000 <br />u.i <br />H <br />Q <br />~° ~ 800 <br />o~ ~ <br />600 <br />400 <br />200 <br />0 <br />' 1974' 1975' 1976' 1977' 1978' 1979' 1980' 1981' 1982 ' 1983' 1984' 1985' 1986' 1987' 1988' 1989' 1990' 1991' 1992' 1993' 1994 ~ 1995 ~ 1996' <br />YEAR <br />FIGURE B-16. SULFATE VERSUS TIME FOR WELLS B-2, GC-2, GP-9, P-8 AND 81-03A. <br />3'2~ ~NNI"fE S5 <br />