WSP05652

• File Number: 8273.300
• Description: Colorado River Basin Salinity Control - Federal Agency Reports - USGS
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/1997
• Author: USGS
• 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
• Water Supply Pro - Doc Type: Report/Study

81.1.0

Table 11. Comparison of environmental and concurrent- and sequential.replicate samples for nutrients and organic carbon-Continued

[Env.. environmental sample; Rep., replIcate sample; Dirf. ]. difference In units of constituent; Diff. 2. difference In lowest rounding unit: mgfL, milligrams per liter; <. value I:" k:i~ than the laboralOry
minimum reporting level; shaded cdb repre~enl differences greater than plus or minus llllwe~l rounding unit; /owesl rounding UlHI is equal!O the m.1gnlwdt'l)f lhe It''.3Sf signifil',mt figure]

Station

Date

Dissolved phosphorus Total phosphorus Orthophosphate
Env. Rep. Oill.l Dift.2 Env. Rep. Dill. 1 0111.2 Env. Rep. Dill. 1 Dill. 2
(mglL) (mglL) (mgIL) (mg/L) (mg/L) (mglL) (mg/L) (mg/L) (mglL)
Concurrent replicates
0.01 om 0 0 0.2t 0.23 -0.02 -2 0.02 0.02 0 0
<0.01 0.03 -0.025 -2.5 0.54 0.44 0.10 10 <0.01 <0.01 0 0
<0.01 <0.01 0 0 0.01 0.02 -0.01 -I 0.01 0.01 0 0
0.01 <0.01 0.005 0.5 <0.01 <O.(l! 0 0 <0.01 <0.01 0 0
0.01 0.01 0 0 0.06 0.05 0.01 I <0.(11 <0.01 0 0
0.04 0.04 0 0 O.OR 0.05 0.03 3 0.05 0.05 0 0
<0.01 <O.Ot 0 0 <0.01 <0.01 0 0 <0.01 d).OI 0 0
-0.025 -2.5 0.10 10 0 0
71 7t 29 29 100 100
R6 57 100
Sequ('ntiall"eplicates
<0.01 <0.01 0 0 0.03 0.05 -0.02 -2 O.DI 0.01 0 0
<0.01 <0.01 0 0 0.03 0.0\ 0.02 2 <0.01 <0.01 0 0
<0.01 <0.01 0 0 <0.01 <0.01 0 0 <0.01 <0.01 0 0
0 0 ,,0.02 ,,2 0 0
3 3 I 3 3
3 3

State Line 091096
Cameo 051396
Gunnison at 32 Road 071895
East 113095
East 051696
Gore 082396
Baker 081895
Maximum difference
Percent of samples wilh
no difference
Percent of samples
within plus or minus I
C lowesl rounding unit
C
~
C
.... DOIsero 032096
-<
(, Reed 112295
0
z Baker 022796
il
0 Maximum difference
r
l/l Number of samples with
~ no difference
l:
... Number of samples
r
Z within plus or minus J
!;)
... lowesl rounding unit
'"
0
!;)
'"
~
l:
..
'"