“…Several Federal, State, and local agencies maintain computerized data bases of chemical analyses. 'Additional sources of data are the State universities and previous investigations (Mogg and others, 1960;Hart, 1966;Wood and Burton, 1968;Hart, 1974;Bingham and Moore, 1975;Carr and Havens, 1976;Carr and Marcher, 1977;Wickersham, 1979;Union Carbide Corp., 1978;Gates and others, 1983;and McBride, 1985).…”