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<br /> <br />mg/l <br /> <br />SPRING & POND 20, SULFATE <br />16 <br />14 <br />12 <br />10 <br />8 <br />6 <br />4 <br />2 <br />0 <br />^ MIN. <br />~ MEAN <br />^ MAX. <br />~. <br />..w._~ . <br />oca u` ,~aav`:.'.~:.d}~itiL.Cc `d4 ,.n+ .:w~ ._~51:.:. ..~Ar:..,,._ _ •y:: ..._wa_.. ..._ <br />1987 1986 1985 1984 1983 <br />