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<br />SPRING & POND 22 TDS <br />450 <br />400 <br />350 <br />300 <br />~ m 9 f ~ 250 <br />200 <br />150 <br />100 <br />50 <br />0 <br /> <br />~ MIN. <br />~ MEAN <br />~ MIN. <br /> <br />1987 1986 1985 1984 1983 <br />