WSP05781

• File Number: 8200.750
• Description: San Juan River General
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 4/1/1994
• Author: Robin Abell
• Title: San Juan River Basin - Water Quality and Contaminants Review - Volume I - April 1994
• Water Supply Pro - Doc Type: Report/Study

'Tables '

42.

Concentrations of selenium present in raw materials used by the power industry, and
in various wastes produced during processing and utilization . . . . . . . . . . . . .. .. 13 7
Surface water selenium standards for the San Juan River in New Mexico, Colorado, and
Utah, and EPA criteria. . . . . . . . . . . . . . . . . . . . . . . . . . .
Common fonns of selenium compounds and their characteristics . . . .
Concentrations of selenium known to be hazardous to fish and wildlife .
Selenium levels of concern for fish and wildlife. . . . . . . . . . . . . .
Effects of selenium on aquatic communities under natural conditions in the field .
Bioconcentration factors and selenium in freshwater organisms following exposure to
combined waterborne and dietary sources under natural conditions in the field . .
Selenium concentrations in gonads offish. . . . . . . . . . . . . . . . . . . . . .
Sampling ("I") sites located on or adjacent to irrigation projects, San Juan DOl

investigation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
San Juan reaches from which fish samples were collected, and water and bottom
sediment sampling ("R") sites within each river reach . . . . . . . . . . . . . . .
Number of samples and types of analyses for media at sampling sites on irrigation
projects, the San Juan River, and tributaries . . . . . . . . . . . . . . . . . . . . .
Laboratory reporting levels for selected constituents in water and bottom sediment.
Types of analyses conducted on fish samples from reaches on the San Juan River .
Comparison of baseline concentrations of selected constituents in samples collected
from rivers of the United States with concentrations in 28 samples from the San
Juan River, diversions, and tributaries, and in 48 samples from irrigation project sites. .. 159
Concentrations of selected trace elements in soils of the western United States, in soils
from the San Juan basin, in bottom sediments from 19 National Irrigation Water-Quality
Program (NIWQP) study areas, and in bottom sediments from the San Juan River area. . . . 162
Ranges of whole-body concentrations of selected trace elements in biota from pond and

wetland sites. . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . .
Selenium ranges and medians for pond and wetland community media . . . . . . .
Pond and wetland sites in which the concentrations of selenium and biota exceeded
food-item criteria. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Comparison of concentrations of trace elements in fish samples collected for
the National Contaminant Biomonitoring Program (NCBP) with samples collected from
the San Juan River in 1990 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Percent of observations exceeding suggested criteria within various ecosystem components
for the on-site locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Percent of observations exceeding suggested criteria within various ecosystem components
for the San Juan River samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Trace element data for fish samples collected by the U.S. Bureau of Reclamation in the
Dolores Project area in December 1988. . . . . . . . . . . . . . . . . . . . . . . . . .
Trace element data for biota samples collected in the Dolores Project area in May and

June, 1988 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Summary of trace element and toxic element concentrations in the Dolores River at Dolores,

1969-1975 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Water quality data for the Dolores River, 1990 and 1991 . . . . . . . . . . . . . . . . . 191
Summary of impacts and comparison of resource lis sues described in 1980 FES and
1992 plan, Animas-La Plata Project. . . . . . . . . . . . . . . . . . . . . . . . .
Comparison of element concentrations in baseline data for western states and the
Animas-La Plata Project. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Animas-La Plata Project, trace element levels in sediment samples collected March 1992
Animas-La Plata Project, fish toxicant data.
EP A priority pollutant P AHs . . . . . .

43.

44.
45.
46.
47.
48.

. .138
. .140
. .142
. .145
. .146

49.
50.

. .147
. .149

. .154

51.

. .155

52.

53.
54.
55.

. .156
. .157
. .158

56.

57.

58.
59.

. .165
. .166

. .167

60.

61.

62.

63.

. 187

64.

65.

66.
67.

.194

68.

69.
70.
71.

. .196
. .198
. 199
. .204

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