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<br />POND 85, SULFATE <br /> <br />mg/1 <br /> <br />70 <br />60 <br />50 <br />40 <br />30 <br />20 <br />l0 <br />0 <br /> <br />~ MIN. <br />~ MEAN <br />~ MAX. <br />'c 4 i -'e9TMl°'M1~(I~'Y"''#~ Nr ~... ~~g~l'"^'-,.~•11.ic~t~'<.~~: ~.~.`. ~~ <br />a'°1.n*~u rvd~` wc~ ~rL ,~'{:.+a:,5i r .~Mti+~.~ ~ ~. ,fin ~ ~' +4~1~y A.' ` ~f6i <br />1987 1986 1985 1984 1983 <br />