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Enuirmimental Consultant Thu Jwi 18 1992 5:~7 pm Page 2 of 11 <br />• <br />RESEARCH RELATED TO WATER QUALITY ISSUES [see bi6liographyl <br />Cycling of Toxic Elements in Natural Systems <br />Partitioning of metals and nutrients among the dissolved, sus ended and <br />bottom sediment of an estuary containing multiple inputs of ind~stria! <br />wastes: field, laboratory and hydrologic modeling study (1980-8 ) C2, 3, <br />11, 20, 21, 22] <br />^ Distribution of arsenic species (redox and organic) in Heuada <br />groundwaters (1985-87) [23, 24] <br />Geochemical cycling of arsenic, iron, and other elements in M no Lake, <br />California during and after meromixis induced from the El vino vent and <br />in other eastern Sierra Heuada surface waters (1986-91) [17, 19,. 23, 24, <br />25, 27, 28] <br />Transport of Metals and Metalloids in Groundwaters <br />+~ Organometallic complexing and transport of heavy metals in dee~ saline <br />waters: field and geochemical modeling study (1983-851 [5, 6, 8l <br />+~ Experimental field study of the transport of reactive solutes Zn, EDTA, <br />Cr, Se) injected in a groundwater aquifer: field and laboratory tudy <br />(1988-B9) [9, 13, 291 <br />Impact of Drainage lrriyafion Waters on Ecosystems <br />* Chemical and biological transformation of selenium in drainage irrigation <br />ponds near Kesterson Wildlife Management area, California: field nd <br />laboratory study (1988-89) [10, 12, 261 <br />Field investigation of mechanisms far the mobilization and atte uation of <br />arsenic and selenium in irrigation drainage waters: Stillwater Wi dlife <br />Management area, Heuada and Salton Sea, California (1989) [14] <br />Radioactive Waste Disposal <br />Effect of organic complexing agents and temperature on the migra ion of <br />radioactive wastes: an experimental study simulating conditions in the <br />near-field environment of a high level radioactive waste repositor <br />(1980-831 [1, 2, 4, 7] <br />^ Transport of metals in deep saline waters (also mentioned above); <br />geochemical considerations involved in modeling equilibrium metal <br />speciation in this environment are similar to those required for <br />modeling transport of radionuclides in a salt repository for high Reuel <br />radioactive waste disposal (1983-B5) [5, 6, 87 <br />