| USGS
UPPER MIDWEST ENVIRONMENTAL SCIENCES CENTER (BRD) LABORATORY |
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| Sediment Mass
Results |
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| Results
include determination of sediment mass. Target values are determined
gravimetrically during sample preparation. |
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| Median
percent differences are calculated using all submitted analyses by
participants for each sample class. |
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| Upper and
lower control limits are +/-3 f-pseudosigma from median, respectively.
F-pseudosigma = (Interquartile range)/1.349. |
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| Reported
laboratory results percent difference = (((Reported value - Target
value)/(Target value)) * 100). |
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Sediment
Mass Results |
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| Class |
Sample Id |
Target Sediment |
Median Percent |
Lower Control |
Reported Laboratory |
Upper Control |
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Mass |
Difference |
Limit |
Results Percent |
Limit |
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(g) |
(%) |
(%) |
Difference (%) |
(%) |
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| Study 2, 2004
(Nov - Dec) |
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| 1 |
A6049 |
0.066 |
-5.01 |
-20.47 |
-11.85 |
10.44 |
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| 1 |
B5668 |
0.067 |
-5.01 |
-20.47 |
-11.10 |
10.44 |
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| 1 |
C0930 |
0.072 |
-5.01 |
-20.47 |
-17.18 |
10.44 |
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| 2 |
A2822 |
0.275 |
-2.82 |
-10.38 |
-9.03 |
4.73 |
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| 2 |
B4444 |
0.275 |
-2.82 |
-10.38 |
-8.68 |
4.73 |
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| 2 |
C3128 |
0.275 |
-2.82 |
-10.38 |
-9.35 |
4.73 |
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| 3 |
A1954 |
2.640 |
-1.07 |
-3.72 |
-0.75 |
1.57 |
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| 3 |
B3743 |
2.640 |
-1.07 |
-3.72 |
-4.28 |
1.57 |
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| 3 |
C1508 |
2.640 |
-1.07 |
-3.72 |
-1.31 |
1.57 |
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| Study 1, 2005
(May - Jul) |
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| 1 |
A5921 |
0.120 |
-2.96 |
-10.38 |
-5.53 |
4.46 |
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| 1 |
B5345 |
0.120 |
-2.96 |
-10.38 |
-5.03 |
4.46 |
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| 1 |
C1239 |
0.120 |
-2.96 |
-10.38 |
-5.45 |
4.46 |
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| 2 |
A5655 |
0.240 |
-3.48 |
-11.39 |
-5.53 |
4.43 |
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| 2 |
B3526 |
0.240 |
-3.48 |
-11.39 |
-4.84 |
4.43 |
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| 2 |
C1140 |
0.240 |
-3.48 |
-11.39 |
-4.56 |
4.43 |
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| 3 |
A1135 |
3.601 |
-1.69 |
-5.99 |
-2.38 |
2.62 |
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| 3 |
B0662 |
3.601 |
-1.69 |
-5.99 |
-2.37 |
2.62 |
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| 3 |
C4408 |
3.601 |
-1.69 |
-5.99 |
-1.84 |
2.62 |
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| Study 2, 2005
(Nov - Dec) |
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| 1 |
A3208 |
0.060 |
-5.77 |
-23.84 |
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12.29 |
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| 1 |
B0215 |
0.060 |
-5.77 |
-23.84 |
-15.81 |
12.29 |
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| 1 |
C7068 |
0.060 |
-5.77 |
-23.84 |
-23.82 |
12.29 |
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| 2 |
A3217 |
1.485 |
-1.82 |
-4.56 |
-1.62 |
0.92 |
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| 2 |
B3177 |
1.485 |
-1.82 |
-4.56 |
-5.56 |
0.92 |
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| 2 |
C6915 |
1.485 |
-1.82 |
-4.56 |
-1.56 |
0.92 |
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| 3 |
A7217 |
4.360 |
-2.19 |
-7.07 |
-3.34 |
2.68 |
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| 3 |
B0414 |
4.361 |
-2.19 |
-7.07 |
-2.35 |
2.68 |
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| 3 |
C5657 |
4.361 |
-2.19 |
-7.07 |
-2.31 |
2.68 |
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| Study 1, 2006
(May - Jun) |
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| 1 |
A1018 |
0.084 |
-3.90 |
-11.30 |
-11.22 |
3.60 |
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| 1 |
B0477 |
0.084 |
-3.90 |
-11.30 |
-12.54 |
3.60 |
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| 1 |
C2314 |
0.084 |
-3.90 |
-11.30 |
-10.33 |
3.60 |
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| 2 |
A3512 |
1.080 |
-1.50 |
-5.40 |
-2.80 |
2.40 |
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| 2 |
B6661 |
1.080 |
-1.50 |
-5.40 |
-4.50 |
2.40 |
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| 2 |
C4518 |
1.080 |
-1.50 |
-5.40 |
-3.29 |
2.40 |
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| 3 |
A5571 |
4.410 |
-1.70 |
-5.50 |
-2.63 |
2.10 |
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| 3 |
B0413 |
4.410 |
-1.70 |
-5.50 |
-2.75 |
2.10 |
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| 3 |
C3370 |
4.410 |
-1.70 |
-5.50 |
-3.39 |
2.10 |
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| Laboratory
discontinued evaluating water-sediment samples and had no further need to
participate in the SLQA. |
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BRD Suspended Sediment Concentration Results |
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