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

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3 ::D Table 9. Comparison of environmental and concurrent- and sequential-replicate samples for general chemical constituents
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..Ill [Env., environmental sample; Rep., replicate sample; Diff. I, difference in units of constituent; Diff. 2, difference in lowest rounding unit; mglL, milligrams per liter; I1glL,
micrograms per liter;
I: 0
Q.- shaded cells represent differences greater than plus or minus I lowest rounding unit; lowest rounding unit is equal to the magnitude of the least significant figure; liS/em, microsiemens
per centimeter
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C:I: at 25 degrees Celsius]
~ DI
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::E' Calcium Magnesium Sodium Potassium
DI 0
..0
CD ~ Station Date
... .. Env. Rep. Ditt.1 Env. Rep. Ditt.1 Env. Rep. Ditt.1 Env. Rep. Ditt.1
;::2- (mglL) (mglL) (mglL) Ditt.2 (mglL) (mglL) (mglL) Ditt.2 (mglL) (mglL) (mg/L) Ditt.2 (mg/L) (mglL) (mglL) Ditt.2
DI en
... DI
~3 Concurrent replicates
cg'C State Line 091096 120 120 0 0 35 35 0 0 4.2 4.1 0.1 1
cg=
Y'~ Cameo 051396 34 33 1 1 7.2 7.1 0.1 1 1.4 1.5 -0.1 -1
lis.
en Gunnison at 32 Road 071895 22 22 0 0 4.5 4.5 0 0 0.8 0.7 0.1 1
I:
~ East 113095 46 47 -1 -1 8.5 8.6 -0.1 -1 0.9 0.9 0 0
DI
lil East 051696 22 23 -1 -1 0.6 0.6 0 0
::E Gore 082396 42 41 1 1.1 1.1 0 0
DI 1
..
CD
... Baker 081895 7.4 7.5 -0.1 -1 1.4 1.4 0 0 0.8 0.8 0 0
-
0
... Maximum difference :1:1 :1:1 :1:2 -2 -2 :1:0.1 :1:1
..
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CD Percent of samples with 29 29 43 57 57 57 57
c:
'C no difference
'C
CD Percent of samples 100 86 71 100
...
0 within plus or minus 1
0
0' lowest rounding unit
...
DI
Q. Seqnential Replicates
0
::D Dotsero 032096 39 39 0 0 7.7 7.7 0 0 17 17 0 0 1.8 1.8 0 0
<'
CD Reed 112295 550 540 10 1 220 210 10 1 300 290 10 1
...
Z
DI Baker 022796 9.1 9.0 0.1 1 2.4 2.4 0 0 1.9 1.9 0 0 0.9 0.9 0 0
..
o' Maximum difference 10 1 10 1 10 1 0.4 4
~
!!!.
::E Number of samples with 1 1 2 2 2 2 2 2
DI no difference
Ii
... Number of samples 3 3 3 2
b
I: within plus or minus 1
!!!.
~ lowest rounding unit