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

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3'" Table 9. Comparison of environmental and concurrent- and sequential-replicate samples for general chemical constituents
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-.. [Env.. environmental sample; Rep., replicme sarnpk; Diff. I, difference in uniLS of conslltuenL Dirf. 2. difference in lowest rounding unit; mglL. milligrams per liter: /lglL, micrograms ~r liter;
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0._ shUlled cells repre~ent differences gTemer than plus Of minus Ilowesl rounding Unit; lowe!>t rounding unil is equal 10 the magnilUde of the km.t significant figure; IlSlcm. mltrosieme.m. peT centimeter
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Cc at 2'5 degrees Celsiusj
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;:l;. Calcium Magnesium Sodium Potassium
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iDg Station Date --
, - Env. Rep. Dill. 1 Env. Rep. Dill. 1 Env. Rep. Dill. 1 Env. Rep. Dill. 1
-<' Dill. 2 Dill. 2 Dill. 2 Diff.2
.. 5!. (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L)
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::'3 C()nculTenl replit.'ates
",'C Slale Line 091096 120 120 0 0 35 35 0 0 90 92 -2 -2 4.2 4.\ 0.1 I
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.,..g Cameo 051396 34 33 1 I 7.2 7.t 0.1 t 20 20 0 0 1.4 1.5 -0.\ -I
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'" Gurmison at 32 Road 071895 22 22 0 0 4.5 4.5 0 0 2.4 2.4 0 0 0.8 0.7 0.1 1
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it Easl 113095 46 47 -I -I 8.5 8.6 -0.1 -I 4.J 4.3 0 0 0.9 0.9 0 0
2 Easl 051696 22 23 -I -I 3.5 3.7 --0.2 -2 1.4 1.5 -0.1 -I 0.6 0.6 0 0
::e 4.7 4.5 0.2 2 1.1 1.1 0 0
~ GoP~ 082396 42 41 I ] 7.3 7.2 0.1 ]
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, Bak'~r 081895 7.4 7.5 -0.1 -] 1.8 1.8 0 0 1.4 1.4 0 0 0.8 0.8 0 0
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, Ma.xirnurn difference ~1 ~I -0.2 ~2 -2 -2 ~O.] ~I
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" Percent of samples wilh 29 29 43 43 57 57 57 57
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'C n(1 difference
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!!1 Pem~nt of samples 100 86 7i 100
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0 within plus or minus I
S- lowest rounding Ullil
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0. Sl'quential Replicates
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'" Dotsl~ro 032096 39 39 0 0 7.7 7.7 0 0 17 17 0 0 1.8 1.8 0 0
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!!1 Reed 112295 550 540 10 ] 220 210 10 ] 300 290 10 1 9.5 9.1 0.4 4
z 0.9 0.9 0 0
~ Baker 022796 9.1 9.0 0.1 ] 2.4 2.4 0 0 1.9 1.9 0 0
o' Maximum difference 10 i 10 ] 10 ] 0.4 4
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;:l; Numher of samples with I ] 2 2 2 2 2
" no difference
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b Number of samples 3 3 3 2
c within plus or minus 1
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~ lowest rounding unit