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

...
Cl Table 6. Comparisons of environmental and pre-processing split-replicate samples for nutrients and organic carbon
~- [Env., environmental sample; Split, pre-processing split-replicate sample; Diff. I, difference in units of constituent; Diff. 2, difference in lowest rounding unit; mglL, milligrams
per liter; shaded cells
III 3-
III CD represent differences greater than plus or minus I lowest rounding unit; lowest rounding unit is equal to magnitude of the least significant figure; <, value is less than the
laboratory minimum reporting
(I) ::::!.
:: 3 level]
3 :JJ
CD CD
;:, III
..I: Ammonia Dissolved ammonia plus organic Total ammonia plus organic
l/);:;:
..Ill
I: 0 Station Date Env. Split Ditt.1 Env. Split Ditt.1 Env. Split Ditt.1
c,_
'<0 (mg/L) (mg/L) (mg/L) Diff.2 (mg/L) (mg/L) (mg/L) Ditt.2 (mg/L) (mg/L) (mg/L) Diff.2
C:I:
;:, III
::;= Gunnison near 090596 0.Q2 0.02 0 0 0.3 0.2 0.1
-~
::E' Grand Junction
1110
..0 Gore 102495 <0.02 <0.02 0 0 <0.2 <0.2 0 0 <0.2 <0.2 0 0
CD ;:,
... ..
;;:2- Uncompahgre 072596 0.03 0.03 0 0 <0.2 <0.2 0 0 0.3 0.2 0.1 1
III l/)
... III French 090996 <0.02 <0.02 0 0 <0.2 <0.2 0 0 <0.2 <0.2 0 0
~3
lS-g, Dry 082996 0.05 0.05 0 0 0.4 0.4 0 0 0.8 0.8 0 0
<reS Dry Fork 071596 0.03 0.02 0.01 1 0.3 0.2 0.1 1 0.3 0.2 0.1 1
(go
QI- Baker 071696 <0.2 <0.2 0 0 <0.2 <0.2 0 0
l/)
I:
~ Maximum difference 0.02 2 0.1 1 -0.3 -3
lil Percent of samples with 71 71 71 71 57 57
::E no difference
III
lD Percent of samples 86 100 86
...
- within plus or minus 1
0
...
~ lowest rounding unit
CD
c:
'0
'0 Nitrite Nitrite plus nitrate Dissolved organic carbon Suspended organic carbon
CD
... Station Date
0 Env. Split Ditt.1 Env. Split Ditt.1 Env, Split Ditt.1 Env. Split Ditt.1
0 Ditt.2 Ditt.2 Ditt.2 Ditt.2
0' (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L)
...
III Gunnison near 090596 0.01 0.02 -0.01 -1 1.5 1.5 0 0 3.5 3.4 0.1 0.9 0.8 0.1
c,
0 Grand Junction
:JJ
<' Gore 102495 <0.01 <0.01 0 0 0.44 0.44 0 0 1.4 1.3 0.1 1 0.1 0.2 -0.1 -1
CD
...
Z Uncompahgre 072596 0.01 0.01 0 0 0.14 0.14 0 0 1 0.9 0.1 1 0.3 0.3 0 0
a
0' French 090996 <0.01 <0.01 0 0 0.07 0.08 -0.01 -1 0.5 0.4 0.1 1 <0.1 <0.1 0 0
;:,
e!. Dry 082996 0.02 0.02 0 0 3.9 3.9 0 0 3.4 3.5 -0.1 -1
::E
III Dry Fork 071596 0.01 0.01 0 0 0.79 0.8 -0.01 -1 5.2 5.1 0.1 1 0.4 0.5 -0.1 -1
..
CD
... Baker 071696 0.01 0.01 0 0 0.1 0.09 0.01 1 1.9 1.9 0 0
b
I: Maximum difference -0.01 -1 :to.0 1 :t1 :1:1 :1:1 :to.4 :t4
e!.
~ Percent of samples with 86 86 57 57 14 14 29 29
no difference
Percent of samples 100 100 100 71
within plus or minus 1
lowest rounding unit