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<br />POND 89 TDS <br />400 <br />350 <br />300 <br />250 <br />m g/ 1 200 <br />150 <br />100 <br />50 <br />0 <br /> <br />^ MIN. <br />^ MEAN <br />® MAX. <br />..~-...,.~~~`bs 13 ~~~'? .v x~P.:Y+~.. ~a.r:3.a ~..~ .._. ~5~.'~.Sfax.. ti.. .. .s+'.er ..~.: 1iw~.u~"15.....C~'iS~J~Us: ~'iLe6[,/Y.-M?..eiu'i1~-- <br />1987 1986 1985 1984 1983 <br />