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C~ <br />POND 88 Ca, ~ Dissolved) <br /> <br /> <br />mg/1 <br />50 <br />45 <br />40 <br />35 <br />30 <br />25 <br />20 <br />15 <br />10 <br />5 <br />0 <br />~ MIN. <br />~ MEAN <br />S MAX. <br />~_..rr _a.n_ i _- x t ... :'v:i:d~. ^'•.,~;_b, .. _.... _._ ~.~¢c~_t~.~~`~S®®•,ct~s rd~...:y~.'..s~.' '+='~_~p%5:.:°:~.~,itTS.~~~Si~ n<. <br />1987 1986 1985 1984 1983 <br />