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<br />TABLES (ConUnued) <br /> <br />4. Maximum and minimum concentrations of selected trace elements in four soil samples from <br />Dawson Draw (near site DO) ................................................................................................................................... 19 <br />S. Range of trace-element concentrations in bottom-sediment samples collected at Mc Elmo Creek near <br />the Colorado-Utah State line (site MID) and at San Juan River at Four Comers (site SJI) .................................... 20 <br />6. Concentrations of trace elements in seven sections of a core sample of bottom sediment collected from <br /> <br />Narraguinnep Reservoir. July 1990 .......................................................................................................................... 20 <br />7. Trace-element data for biota samples collected in the Dolores Project area in May and June 1988 ....................... 21 <br />8. Selected trace-element data for fish samples collected in the Dolores Project area in December 1988 .................. 22 <br />9. Trace-eIement concentrations in water, bottom-sediment, and biota samples collected in the <br />Mancos River basin. July 1. 1989 ...........................................;................................................................................ 23 <br />10. Constituents analyzed in water. bottom-sediment, and biota samples ..................................................................... 27 <br />11. Sampling sites and type of samples collected for the reconnaissance investigation during 1990 ........................... 29 <br />12. Collection schedule of water, bottom-sediment, and biota samples for the reconnaissance investigation <br />during 1990 .............................................................................................................................................................. 30 <br />13. Drinking-water regulations and aquatic-life criteria of the U.S. Environmental Protection Agency and <br /> <br />agricultural-use criteria of the State of Colorado ..................................................................................................... 32 <br />14. Number of water samples collected in the Dolores Project area that had constituent concentrations <br />exceeding drinking-water regulations and aquatic-life criteria of the U.S. Environmental Protection Agency <br />and exceeded agricultural-use criteria of the State of Colorado .............................................................................. 33 <br />IS. Statistical summary of trace-element concentrations in water samples collected in the Dolores Project <br /> <br />area in 1990 .............................................................................................................................................................. 36 <br />16. Statistical summary of selected trace-element concentrations in bottom-sediment samples collected <br /> <br />in the Dolores Project area in November 1990 ........................................................................................................ 40 <br />17. Background geochemical data for soils in the Western United States and the observed range of trace- <br />element concentrations in bottom-sediment samples collected for the U.S. Department of the Interior's <br />Irrigation Drainage Program from 1986-88 ............................................................................................................ 41 <br />18. National Contaminant Biomonitoriog Program (NCBP) 8Sth-perceotiIe concentrations for 1984 and the <br />number of whole-body fish samples collected in the Dolores Project area that exceeded the 8Sth <br /> <br />percentile for 1984 ................................................................................................................................................... 43 <br />19. Statistical summary of selenium concentrations in selected biota samples collected in the Dolores Project <br /> <br />area in 1990 .............................................................................................................................................................. 44 <br />20. Mean mercury concentrations in fillets of game fish collected in the Dolores Project area. 1988-91. and <br /> <br />recommended human consumption limits ............................................................................................................... S2 <br />21. National Contaminant Biomonitoriog Program (NCBP) geometric mean concentrations of selected <br />organochlorine pesticides and PCB's for 1984 ........................................................................................................ S6 <br />22. Physical properties and inorganic constituent concentrations in water samples collected in the <br />Dolores Project area from March through November. 1990..................................................................................... 66 <br />23. Pesticide concentrations in water samples collected in the Dolores Project area in July 1990 ....:........................... 78 <br />24. Trace-element concentrations in the less than O.062S-miIlirneter size fraction in bottom-sediment <br />samples collected in the Dolores Project area in 1990.............................................................................................. 79 <br />2S. Trace-element concentrations in the less than 2-millimeter size fraction in bottom-sediment samples <br /> <br />collected in the Dolores Project area in 1990 ........................................................................................................... 82 <br />26. Concentrations of organic compounds in bottom-sediment samples collected in the Dolores Project <br /> <br />area in 1990 ............................................................................................................................................................... 8S <br />27. Trace-element concentrations in aquatic-plant, aquatic-invertebrate. fish, and bird samples collected <br />in the Dolores Project area. April through November. 1990 .................................................................................... 87 <br />28. Concentrations of selected pesticides and polychlorinated biphenyls (PCB's) in fish and bird samples <br />collected in the Dolores Project area in 1990 ........................................................................................................... 123 <br />29. Polycyclic-aromatic hydrocarbon (PAIl) concentrations in fish bile collected in the Dolores Project <br /> <br />area. 1990--91 ................................................................................... ......................................................................... 126 <br /> <br />CONTENTS v <br />