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<br />TABLES
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<br />I, Surface-water-sampling sites and types of samples collected in the Uncompahgre Project area........................,.... 18
<br />2, Surface-water-sampling sites and types of samples collected in the Grand Valley......,................,.....,.......,............ 21
<br />3, Records of selected wells and a spring in the Uncompahgre Project area and selected wells in the
<br />
<br />Grand Valley......,",.. .......', ,.. '..,.....,....,..,.... ,...., ..,......'""". ........'", ....,.....'.,.." ............', ............ .....'" ,... ........'.,.., ....... 23
<br />4, Onsite measurements and chemical data for surface-water sites in the Uncompahgre
<br />Project area, 1991-92., ,.,..'....",.. .... .........,...'"",. ......."" ,...'", ,...............' ......, ,.". ......',..""...........'...... ,......,.... ,.......... 24
<br />5, Onsite measurements and chemical data for surface-water sites in the Grand Valley, 1991-92......,........................ 48
<br />6, Onsite measurements and chemical data for sites on the Colorado River and Plateau Creek and
<br />the Gunnison River at Whitewater, 1991-92 ........................,.....................................,...,.................................,....... 62
<br />7. Stable-isotope ratios of hydrogen and oxygen in surface water, Uncompahgre Project area and the
<br />Grand Valley, 1991-92..",....",.. ...............'.,..'""........."'" .... ........., .... ,.,. ......,..", ..........'""". ,...... ......',.."", ,........"" ,. 70
<br />8, Concentrations of insecticides in water samples from the Grand Valley, 1991,......................................,.........,...... 71
<br />9. Onsite measurements of selected properties of water from selected wells and a spring in the
<br />Uncompahgre Project area and selected wells in the Grand Valley, 1991-92 ,...,.......'........,.............................,....,' 72
<br />10. Concentrations of major dissolved constituents, nitrogen species, and dissolved organic carbon in
<br />water from selected wells and a spring in the Uncompahgre Project area and selected wells in the
<br />Grand Valley, 1991-92..",....... ................ ,...,..........,... ..........,......"..........' ........".. ..........",........... ....',.."........ ........... 75
<br />II. Concentrations of dissolved trace elements in water from selected wells and a spring in the
<br />Uncompahgre Project area and selected wells in the Grand Valley, 1991-92..........,.....................................,......... 79
<br />12, Stable-isotope ratios of oxygen, hydrogen, sulfate sulfur, and nitrate nitrogen in water from selected wells
<br />and a spring in the Uncompahgre Project area and selected wells in the Grand Valley, 1991-92.......,...............,.... 83
<br />13, Trace-element concentrations in bonom-sediment samples, in a salt-crust sample, and in a soil sample................ 85
<br />14. Major-constituent, total-carbon, and organic-carbon concentrations in bollom-sediment samples,
<br />in a salt-crust sample, and in a soil sample..,...............................,......................................................,...................., 87
<br />15, Trace-element concentrations from whole-rock analyses of bedrock and aquifer-sediment samples...................... 88
<br />16. Major-constituent. total-carbon. and organic-carbon concentrations from whole-rock analyses of
<br />bedrock and aquifer-sedi ment samples" ...,...........,...", ...,.....' .......,...,... .........." ......... ....,...,... ,.. ...........'", ................. 92
<br />17, Semiquantitative bulk and clay mineralogy of Mancos Shale core, shale residuum. alluvium, and
<br />ground-water fi Iter residuum".."..... ,...... ...,'.',..",.". ......'""...."". ...........",.... .......'", .....,.........'...", ,... ............"... ..... 93
<br />18, Concentrations of dissolved selenium species in surface-water samples from the Grand Valley.
<br />March 24. 1992.. ,........ .........."",......'"",..." ,............""", ......... ............ ,.........'"" ....,...... ............ ,.....'. ....." ................ 94
<br />19, Concentrations of dissolved selenium species in water from selected wells in the Uncompahgre
<br />Project area and in the Grand Valley, 1992...........................,............,......................,.......................'....................... 94
<br />20, Concentrations and speciation of extractable selenium in bollom-sediment samples from the
<br />Uncompahgre Project area and the Grand Valley, 1992 .,.............,......................................,.,.........................'......., 95
<br />21. Concentrations and speciation of extractable selenium in aquifer-sediment samples from the
<br />
<br />Grand Valley............"""".....""",."""...",." ......."."..""""..............,.." .....".'",."".....'.',.........., ,....'""""". ,..........", 95
<br />22, Aquifer-test results from wells in the Mancos Shale and associated alluvium, Grand Valley........................,......., 96
<br />23. Trace-element concentrations in aquatic-plant, aquatic-invertebrate, and fish samples collected from
<br />tributaries west of the Uncompahgre River and within the Uncompahgre Project during 1991....,......................... 97
<br />24. Trace-element concentrations in aquatic-plant. aquatic-invertebrate, and fish samples collected from
<br />tributaries east of the Uncompahgre River and within the Uncompahgre Project during 1991,..........,.................., 99
<br />25. Trace-element concentrations in aquatic-plant. aquatic-invertebrate, and fish samples collected from
<br />Crawford Reservoir, the Smith Fork, and the North Fork of the Gunnison River during 1991.................,............. 100
<br />26, Trace-element concentrations in aquatic-plant, aquatic-invertebrate, and fish samples collected
<br />from the Gunnison River and tributaries between the confluence with the North Fork and the confluence
<br />with the Uncompahgre River during 1991 ,...,...............................................................,................................,.,....... 102
<br />27, Trace-element concentrations in aquatic-plant, aquatic-invertebrate, amphibian, and fish samples
<br />collected from tributaries of the Gunnison River downstream from the confluence with the Uncompahgre
<br />
<br />River during 1991 ,... ...,...."",.,."""",..",..."....'.'"""".""..,.....,. ,.. .......'"...."........"",..... '.,.. ...... ...".'"...." ............'"" 104
<br />28. Trace-element concentrations in aquatic-invertebrate, amphibian, and fish samples collected from
<br />tributaries of the Colorado River west of Fruita and from Highline Lake during 1991..........,.........,............"....... 105
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<br />IV CONTENTS
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