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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Table 13. Comparison of post-processing split-replicate samples for general chemical constituents

[Diff. I, difference in units of constituent; Diff. 2, difference in lowest rounding unit; mglL, milligrams per liter; /lgIL, micrograms per liter; /lS/cm, rnicrosiemens per centimeter
at 25 degrees Celsius;
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]

Calcium Magnesium Sodium Potassium
Station Date Split A Split B Ditt.1 Split A Split B Ditt.1 Split A Split B Ditt.1 Split A SplitB Ditt.1
(mg/L) (mg/L) (mg/L) Ditt.2 (mg/L) (mg/L) (mg/L) Ditt.2 (mg/L) (mg/L) (mg/L) Ditt.2 (mg/L) (mg/L) (mg/L) Ditt.2
State Line 091096 120 120 0 0 35 35 0 0 92 92 0 0 4.1 4.2 -0.1 -1
Cameo 051396 33 33 0 0 7.1 7.2 -0.1 -1 20 20 0 0 1.5 1.5 0 0
Gunnison Tunnel 062995 18 17 1 1 3.7 3.6 0.1 1 3.9 3.8 0.1 1 1.4 1.4 0 0
Gunnison at 32 Road 071895 22 22 0 0 4.5 4.5 0 0 2.4 2.3 0.1 1 0.7 0.7 0 0
East 113095 47 46 1 1 8.6 8.5 0.1 1 4.3 4.3 0 0 0.9 0.9 0 0
East 051696 23 23 0 0 3.7 3.7 0 0 1.5 1.5 0 0 0.6 0.6 0 0
Gore 082396 41 41 0 0 7.2 7.2 0 0 4.5 4.5 0 0 1.1 1.1 0 0
Baker 081895 7.5 7.5 0 0 1.8 1.8 0 0 1.4 1.4 0 0 0.8 0.8 0 0
Maximum difference 1 1 :1:0.1 :1:1 0.1 1 -0.1 -1
Percent of samples with 75 75 62 62 75 75 88 88
no difference
Percent of samples 100 100 100 100
within plus or minus 1
lowest rounding unit
Sulfate Chloride Fluoride Laboratory alkalinity
Station Date Split A Split B Ditt.1 Split A Split B Ditt.1 Split A SplitB Ditt.1 Split A Split B Ditt 1.
(mg/L) (mg/L) (mg/L) Ditt.2 (mg/L) (mg/L) (mg/L) Ditt.2 (mg/L) (mg/L) (mg/L) Ditt.2 (mg/L) (mg/L) (mg/L) Ditt.2
State Line 091096 370 370 0 0 Illilll:l!i!li!!i!!i!i!!lii~~!!liim!liIlilillllll~iillilli!iillliiiliillllli!l!i!l! 0.4 0.4 0 0 181 181 0 0
Cameo 051396 40 40 0 0 22 22 0 0 0.2 0.2 0 0 87 87 0 0
Gunnison Tunnel 062995 13 13 0 0 0.7 0.7 0 0 0.1 0.1 0 0 56 56 0 0
Gunnison at 32 Road 071895 8.4 8.4 0 0 0.6 0.6 0 0 0.1 0.1 0 0 71 71 0 0
East 113095 34 34 0 0 1.1 1.2 -0.1 -1 0.1 0.2 -0.1 -1 126 126 0 0
East 051696 10 10 0 0 0.5 0.5 0 0 0.1 0.1 0 0 64 64 0 0
Gore 082396 35 35 0 0 5.5 5.5 0 0 0.1 0.1 0 0 103 103 0 0
Baker 081895 4.9 5 -0.1 -1 0.1 0.1 0 0 0.3 0.2 0.1 1 26 26 0 0
Maximum difference -0.1 -1 6 6 :1:0.1 :1:1 0 0
Percent of samples with 88 88 75 75 75 75 100 100
no difference
Percent of samples 100 88 100 100
within plus or minus 1
lowest rounding unit