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

0> Table 4. Comparison of environmental and pre-processing split-replicate samples for general chemical constituents-Continued
,.- (En\'" tnVtr0nmental sample; Split. pre-procesSIng ~pllt-repli(:ttte ~ample: DiCf. I. difference in urub o(consllluenl: Diff. 2, difference in lowest roundmg uni\; mgfL, milligrams per tiler; ~g/L mICrograms
..a
" m p~r liter; ~Slclll. mlcrosiemt"ns per centimeter at 25 degrees Celsius; shaded cell~ represenl difft"rences grealer lh<Ul plus or minus I Jowe~l rounding unit; lowest rounding unit is equal [0 lhe magnilUde of
m::!.
l: 3 the It-asl significant figure!
3'"
m m
" "
-<: Silica Iron Manganese
VI"
-"
<: 0 Station Date Env. Split Diff.1 Env. Split Dill. 1 Env. Split Dill. 1
0.- Dill. 2 Dill. 2 Dill. 2
"'0 (mgIL) (mgIL) (mgIL) (~gIL) (~g/L) (~gIL) (~g/L) (~gIL) (~g/L)
c:c
::!.!! Gunnison near 090596 i3 \3 0 0 3 3 0 0 IS 14 I
~~
::Eh Grand Junction
lto Gore 102495 5,4 5.4 0 0 3 3 0 0 3 3 0 0
m "
~ -
-<~ Uncompahgre 072596 10 10 0 0 3 3 0 0 46 50 -4 -4
m~
lOen French 090996 9.5 9.4 0.1 1 11 15 ..4 -4 10 10 0 0
~ ..
~3
:g-g Dry 08~996 ~o 19 I 1 3 3 0 0 67 67 0 0
'l'eE Dry Fork 071596 16 16 0 0 9 9 0 0 4 4 0 0
"'0 130 9 9 0 0
"'- Baker 071696 6.7 66 0.1 I 120 10 1
en
<: Maximum difference I I 10 -4 -4 -4
'"
" 57 71 71 71 71
n Percenl of samples wilh 57
..
::E 110 difference
" 86 86
!l Percent of samples 100
~ within plus or minus I
!i lowesl. rounding unit
m
c:
" Laboratory pH Laboratory specific conductance Residue on evaporation
"
m --- --
~ Station Date Env. Split Dill. 1 Env. Split Ditt.' Env. Split Diff.1
(') Diff.2 Dill. 2 Dill. 2
0 (flSlcm) (flSlcm) (flSlcm) (mgIL) (mgIL) (mgIL)
0- (standard units)
iil Gunnison near 090596 8.0 8.0 0 0 980 978 2 2 749 738 II 1]
0.
0 Grand Junction
"
.r Gore 10~495 8.0 7.9 0.1 I 3~9 3~7 2 ~ 193 ]91 2 2
~
z Uncompahgre 072596 8.0 8.0 0 0 575 573 2 2 396 391 5 5
a
0- French 090996 7.1 7.3 -0.2 -2 255 256 -I -I 164 164 0 0
~ Dry 08~996 7.9 7.9 0 0 I.~OO 1.210 -10 -I 916 922 -6 -6
::E Dry Fork 071596 8.1 8. I 0 0 2.290 ~.290 0 0 1,730 1.760 -)0 -)
..
!i Baker 071696 7.6 7.8 -0.2 -~ 59 61 3 -~ 44 40 4 4
b
<: Maximum difference -0.2 -~ -10 ,,2 -30 II
!!.
~ Percent of ~amples wilh 57 57 14 14 14 14
no difference
Percent of samples 71 43 14
within plus or minus I
lowest rounding unil ----