9409

• UCREFRP Catalog Number: 9409
• Author: Spahr, N. E. and R. W. Boulger.
• Title: Interim Results of Quality-Control Sampling of Surface Water for the Upper Colorado River national Water-Quality Assessment Study Unit, Water Years 1995-96.
• USFW Year: 1997.
• USFW - Doc Type: 97-4227,
• Copyright Material: NO

State Line 091096
Cameo 051396
Gunnison at 32 Road 071895
East 113095
East 051696
Gore 082396
Baker 081895
Maximum difference
Percent of samples with
no difference
Percent of samples
within plus or minus 1
0 lowest rounding unit
c:
)>
..- Dotsero 032096
:::j
-< Reed 112295
(,
0 Baker 022796
z
.... Maximum difference
::D
0
..- Number of samples with
l/) no difference
)>
s:: Number of samples
'tI
..- within plus or minus 1
Z
l:) lowest rounding unit
'tI
::D
0
l:)
::D
)>
s::
...
ID

Table 9. Comparison of environmental and concurrent- and sequential-replicate samples for general chemical constituents-Continued

[Env., environmental sample; Rep., replicate sample; Diff. 1, difference in units of constituent; Diff. 2, difference in lowest rounding unit; mgIL, milligrams per liter; ItgIL, micrograms
per liter;
shaded cells represent differences greater than plus or minus 1 lowest rounding unit; lowest rounding unit is equal to the magnitude of the least significant figure; itS/em, microsiemens
per centimeter
at 25 degrees Celsius]

Station

Laboratory pH

Env. Rep. Ditt.1
(standard units)

Laboratory specific conductance

Residue on evaporation

Date

Rep.
(itS/em)

Ditt.1
(lLS/C m)

Env.
(mgIL)

Rep.
(mglL)

Ditt.1
(mglL)

Env.
(itS/em)

Ditt.2

Ditt.2

Ditt.2

Concurrent replicates

317
152

316
153

179

180
92

1
-1

1
-1

0.7
57

7
57

11
14

11
14

86

43

34

Sequential replicates

9 9
1 1

2