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

Arsen ic Aluminum Antimony Barium
Station Date Env. Split Ditt.1 Env. Split Ditt.1 Env. Split Ditt.1 Env. Split Ditt.1
(1l9/L) (1l9/L) {J.l.g/L) Ditt.2 (llg/L) (1l9/L) {Jlg/L) Ditt.2 (1l9/L) (1l9/L) {J.l.g/L ) Ditt.2 (1l9/L) (1l9/L) {J.l.g/L) Ditt.2
Uncompahgre 072596 2 2 0 0 50 50 0 0 <1 <1 0 0 41 41 0 0
French 090996 <1 <1 0 0 5 4 1 1 <1 <1 0 0 23 22 1 1
Maximum difference 0 0 1 1 0 0 1 1
Number of samples with 2 2 1 1 2 2 1 1
no difference
Number of samples 2 2 2 2
within plus or minus 1
lowest rounding unit
Beryllium Cadmium Chromium Cobalt
Station Date Env. Split Ditt.1 Env. Split Ditt.1 Env. Split Ditt.1 Env. Split Ditt.1
(1l9/L) (1l9/L) (1l9/L) Ditt.2 (1l9/L) (1l9/L) (1l9/L) Ditt.2 (1l9/L) (1l9/L) (llg/L) Ditt.2 (1l9/L) (1l9/L) (1l9/L) Ditt.2
0 Uncompahgre 072596 <1 <1 0 0 1 1 0 0 1 <1 0.5 0.5 <1 <1 0 0
c
)> French 090996 <1 <1 0 0 7 7 0 0 <1 <1 0 0 <1 <1 0 0
r
:::j Maximum difference 0 0 0 0 0.5 0.5 0 0
<
0 Number of samples with 2 2 2 2 1 1 2 2
0 no difference
z
-I
%l Number of samples 2 2 2 2
0
r within plus or minus 1
(J) lowest rounding unit
)>
s:
"
r
Z
C)
"
%l
0
C)
%l
)>
i:
...
Co)

Table 8. Comparison of environmental and pre-processing split-replicate samples for trace elements

[Env., environmental sample; Split, pre-processing split-replicate sample; Diff. I, difference in units of constituent; Diff. 2, difference in lowest rounding unit; lowest rounding unit
is equal to the
magnitude of the least significant figure; llg/L, micrograms per liter; shaded cells represent differences greater than plus or minus 1 lowest rounding unit; <, value is less than the
laboratory minimum
reporting level]