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USGS WATER, ENERGY, AND BIOGEOCHEMICAL BUDGETS (WEBB) LABORATORY
Sediment Mass Results
Results include determination of sediment mass. Target values are determined gravimetrically during sample preparation. 
Median percent differences are calculated using all submitted analyses by participants for each sample class. 
Upper and lower control limits are +/-3 f-pseudosigma from median, respectively. F-pseudosigma = (Interquartile range)/1.349.
Reported laboratory results percent difference = (((Reported value - Target value)/(Target value)) * 100).
    Sediment Mass Results
Class Sample Id Target Sediment Median Percent  Lower Control Reported Laboratory  Upper Control
  Mass  Difference  Limit  Results Percent  Limit 
    (g) (%) (%) Difference (%) (%)
Study 2, 1998 (Oct - Dec)  
1 A4014 0.070 -3.28 -18.43 -3.66 11.87
1 B3942 0.072 -3.28 -18.43 -3.06 11.87
1 C3870 0.082 -3.28 -18.43 -3.21 11.87
2 A4014 0.129 -3.91 -11.54 -3.12 3.71
2 B3942 0.144 -3.91 -11.54 -3.04 3.71
2 C3870 0.151 -3.91 -11.54 -2.12 3.71
3 A4314 2.709 -1.00 -3.58 -1.07 1.57
3 B4242 3.246 -1.00 -3.58 -0.83 1.57
3 C4170 2.731 -1.00 -3.58 -1.08 1.57
   
Study 1, 1999 (Apr - May)  
1 A3385 0.072 -3.90 -13.19 -3.87 5.39
1 B3448 0.076 -3.90 -13.19 -4.38 5.39
1 C5686 0.074 -3.90 -13.19 -3.74 5.39
2 A7454 0.132 -4.51 -8.94 -3.19 -0.09
2 B7383 0.142 -4.51 -8.94 -3.59 -0.09
2 C1888 0.154 -4.51 -8.94 -7.95 -0.09
3 A5187 2.530 -1.24 -3.28 -1.14 0.80
3 B5293 2.710 -1.24 -3.28 -1.24 0.80
3 C5188 2.622 -1.24 -3.28 -2.82 0.80
   
Study 2, 1999 (Sep - Oct)  
1 A4317 0.069 -3.67 -15.00 -3.45 7.66
1 B4443 0.061 -3.67 -15.00 -6.07 7.66
1 C4575 0.060 -3.67 -15.00 -5.73 7.66
2 A4340 0.160 -3.25 -12.78 -2.01 6.29
2 B4412 0.181 -3.25 -12.78 -1.18 6.29
2 C4575 0.178 -3.25 -12.78 -0.92 6.29
3 A4511 2.791 -0.75 -4.59 -0.99 3.08
3 B4643 2.926 -0.75 -4.59 -0.88 3.08
3 C4767 3.089 -0.75 -4.59 -1.18 3.08
   
Study 1, 2000 (May - Jun)  
1 A1414 0.088 -4.36 -10.87 -3.91 2.16
1 B4444 0.093 -4.36 -10.87 -5.81 2.16
1 C7474 0.099 -4.36 -10.87 -4.07 2.16
2 A1414 0.224 -3.09 -9.45 -3.57 3.26
2 B4545 0.239 -3.09 -9.45 -2.57 3.26
2 C7373 0.244 -3.09 -9.45 -3.09 3.26
3 A2020 2.531 -0.76 -2.78 -0.76 1.26
3 B4444 2.640 -0.76 -2.78 -0.50 1.26
3 C7474 2.750 -0.76 -2.78 -0.60 1.26
   
Study 2, 2000 (Oct - Nov)  
1 A1717 0.112 13.84 -110.48 -16.09 138.16
1 B4444 0.121 13.84 -110.48 54.00 138.16
1 C7474 0.126 13.84 -110.48 49.28 138.16
2 A1414 0.253 3.70 -47.40 26.21 54.80
2 B4444 0.257 3.70 -47.40 -1.01 54.80
2 C7474 0.276 3.70 -47.40 17.34 54.80
3 A1414 2.791 -1.02 -4.15 -1.48 2.10
3 B4444 2.924 -1.02 -4.15 1.60 2.10
3 C7474 3.132 -1.02 -4.15 -4.42 2.10
   
Study 1, 2001 (Jul - Sep)  
1 A2020 0.118 -2.82 -10.90 -4.65 5.27
1 B5050 0.120 -2.82 -10.90 -2.77 5.27
1 C8080 0.126 -2.82 -10.90 -5.10 5.27
2 A1104 0.345 -2.08 -5.64 -1.94 1.48
2 B5056 0.351 -2.08 -5.64 -1.28 1.48
2 C7164 0.376 -2.08 -5.64 -2.13 1.48
3 A0702 2.713 -0.54 -3.56 -0.85 2.49
3 B3139 2.809 -0.54 -3.56 2.49
3 C8976 3.000 -0.54 -3.56 3.80 2.49
   
Study 2, 2001 (Oct - Jan)  
1 A0421 0.089 -1.43 -24.02 -2.68 21.16
1 B5541 0.092 -1.43 -24.02 5.11 21.16
1 C8662 0.100 -1.43 -24.02 -11.47 21.16
2 A2130 0.283 -2.67 -9.23 -3.43 3.88
2 B5555 0.291 -2.67 -9.23 -2.48 3.88
2 C7087 0.310 -2.67 -9.23 -2.60 3.88
3 A1014 2.462 -0.63 -3.17 -0.88 1.91
3 B4931 2.602 -0.63 -3.17 -0.93 1.91
3 C6263 2.750 -0.63 -3.17 -1.10 1.91
   
Study 1, 2002 (Jul - Sep)  
1 A2728 0.066 -1.20 -14.06 -1.89 11.65
1 B4437 0.069 -1.20 -14.06 -5.58 11.65
1 C6385 0.073 -1.20 -14.06 -62.75 11.65
2 A1817 0.144 -3.15 -11.34 -2.41 5.04
2 B4831 0.149 -3.15 -11.34 -2.57 5.04
2 C8469 0.155 -3.15 -11.34 -3.22 5.04
3 A1806 2.481 -0.62 -2.97 -0.92 1.74
3 B3335 2.600 -0.62 -2.97 1.74
3 C7966 2.721 -0.62 -2.97 1.74
   
Study 2, 2002 (Nov - Dec)  
1 A0427 0.072 -2.11 -12.77 -2.64 8.55
1 B4546 0.074 -2.11 -12.77 -4.86 8.55
1 C8788 0.080 -2.11 -12.77 -2.01 8.55
2 A0525 0.116 -2.17 -13.47 -2.34 9.13
2 B4535 0.118 -2.17 -13.47 -1.78 9.13
2 C8577 0.127 -2.17 -13.47 -3.79 9.13
3 A0124 2.432 -0.32 -2.70 1.61 2.07
3 B5748 2.497 -0.32 -2.70 -0.58 2.07
3 C8484 2.767 -0.32 -2.70 -0.53 2.07
   
Study 1, 2003 (Jun - Aug)  
1 A2260 0.101 -3.85 -10.65 -2.49 2.95
1 B0326 0.109 -3.85 -10.65 -2.63 2.95
1 C2650 0.114 -3.85 -10.65 -2.87 2.95
2 A1923 0.202 -2.95 -7.07 -2.02 1.17
2 B2201 0.220 -2.95 -7.07 -2.26 1.17
2 C2454 0.231 -2.95 -7.07 -2.03 1.17
3 A1225 2.836 -0.81 -2.70 -0.58 1.07
3 B5609 3.159 -0.81 -2.70 -0.58 1.07
3 C4226 3.240 -0.81 -2.70 -0.76 1.07
   
Study 2, 2003 (Dec - Feb)  
1 A1302 0.055 -3.87 -18.67 -9.04 10.93
1 B4417 0.056 -3.87 -18.67 -4.53 10.93
1 C1934 0.060 -3.87 -18.67 -8.25 10.93
2 A5302 0.309 -2.12 -5.65 -2.95 1.41
2 B4824 0.310 -2.12 -5.65 -5.38 1.41
2 C6048 0.336 -2.12 -5.65 -4.03 1.41
3 A3259 3.081 -0.57 -2.23 -0.21 1.09
3 B0912 3.081 -0.57 -2.23 -0.06 1.09
3 C2607 3.361 -0.57 -2.23 -0.30 1.09
   
Study 1, 2004 (Jun - Jul)  
1 A5726 0.100 -5.02 -13.98 -9.96 3.93
1 B6024 0.100 -5.02 -13.98 -4.52 3.93
1 C2132 0.099 -5.02 -13.98 -4.81 3.93
2 A3019 0.361 -2.05 -6.89 -1.05 2.79
2 B3543 0.361 -2.05 -6.89 -6.17 2.79
2 C4140 0.360 -2.05 -6.89 -3.77 2.79
3 A0529 2.310 -0.96 -3.68 -0.79 1.75
3 B2618 2.311 -0.96 -3.68 -1.00 1.75
3 C3322 2.311 -0.96 -3.68 -1.41 1.75
   
Study 2, 2004 (Nov - Dec)  
1 A0346 0.066 -5.01 -20.47 -6.59 10.44
1 B4752 0.066 -5.01 -20.47 -4.01 10.44
1 C6128 0.072 -5.01 -20.47 -14.92 10.44
2 A3215 0.276 -2.82 -10.38 -1.74 4.73
2 B0931 0.276 -2.82 -10.38 -1.46 4.73
2 C1257 0.275 -2.82 -10.38 -2.14 4.73
3 A0232 2.640 -1.07 -3.72 -0.54 1.57
3 B3830 2.640 -1.07 -3.72 -1.77 1.57
3 C3425 2.640 -1.07 -3.72 -0.69 1.57
   
Study 1, 2005 (May - Jul)  
1 A3972 0.120 -2.96 -10.38 -3.74 4.46
1 B2326 0.121 -2.96 -10.38 -4.35 4.46
1 C2869 0.120 -2.96 -10.38 -4.14 4.46
2 A2827 0.240 -3.48 -11.39 -4.80 4.43
2 B1707 0.240 -3.48 -11.39 -9.68 4.43
2 C1253 0.240 -3.48 -11.39 -5.57 4.43
3 A4554 3.600 -1.69 -5.99 -1.27 2.62
3 B2870 3.602 -1.69 -5.99 -1.03 2.62
3 C5510 3.601 -1.69 -5.99 -1.12 2.62
   
Study 2, 2005 (Nov - Dec)  
1 A4520 0.060 -5.77 -23.84 -6.90 12.29
1 B2533 0.060 -5.77 -23.84 -1.05 12.29
1 C7625 0.060 -5.77 -23.84 -2.30 12.29
2 A5343 1.485 -1.82 -4.56 -1.03 0.92
2 B4514 1.485 -1.82 -4.56 -0.60 0.92
2 C0268 1.485 -1.82 -4.56 -0.84 0.92
3 A0971 4.360 -2.19 -7.07 -0.94 2.68
3 B4725 4.361 -2.19 -7.07 -0.91 2.68
3 C7141 4.361 -2.19 -7.07 -1.02 2.68
   
Study 1, 2006 (May - Jun)  
1 A2101 0.084 -3.90 -11.30 1.44 3.60
1 B7042 0.084 -3.90 -11.30 0.70 3.60
1 C0128 0.084 -3.90 -11.30 1.41 3.60
2 A1914 1.080 -1.50 -5.40 -1.03 2.40
2 B7552 1.080 -1.50 -5.40 -0.37 2.40
2 C2260 1.080 -1.50 -5.40 -0.90 2.40
3 A3514 4.410 -1.70 -5.50 -1.27 2.10
3 B2349 4.410 -1.70 -5.50 -1.31 2.10
3 C2142 4.410 -1.70 -5.50 -1.09 2.10
   
Study 2, 2006 (Oct - Nov)  
1 A1124 0.072 -3.90 -16.40 -1.07 8.50
1 B0558 0.072 -3.90 -16.40 -4.41 8.50
1 C2712 0.072 -3.90 -16.40 -8.60 8.50
2 A3816 0.695 -2.00 -6.40 -90.14 2.40
2 B1933 0.695 -2.00 -6.40 -2.66 2.40
2 C4068 0.695 -2.00 -6.40 -1.59 2.40
3 A4112 4.650 -0.60 -2.90 -2.52 1.70
3 B4535 4.650 -0.60 -2.90 -1.13 1.70
3 C3276 4.650 -0.60 -2.90 -0.88 1.70
   
Study 1, 2007 (Apr - May)  
   
1 A4370 0.090 -5.23 -20.25 -13.38 9.80
1 B1737 0.090 -5.23 -20.25 -7.23 9.80
1 C6041 0.090 -5.23 -20.25 -15.14 9.80
2 A6068 1.780 -1.18 -3.94 -2.40 1.58
2 B6640 1.780 -1.18 -3.94 -1.83 1.58
2 C3217 1.780 -1.18 -3.94 -1.65 1.58
3 A2216 4.500 -0.81 -3.78 -0.83 2.17
3 B7259 4.500 -0.81 -3.78 -1.47 2.17
3 C1767 4.500 -0.81 -3.78 -1.24 2.17
   
Study 2, 2007 (Nov - Dec)  
   
1 A0256 0.062 -6.08 -23.79 -5.51 11.62
1 B5544 0.062 -6.08 -23.79 -8.06 11.62
1 C4752 0.062 -6.08 -23.79 -14.43 11.62
2 A6026 0.562 -1.85 -7.39 -1.65 3.70
2 B1243 0.562 -1.85 -7.39 -2.14 3.70
2 C6857 0.562 -1.85 -7.39 -3.40 3.70
3 A4957 4.663 -0.69 -3.10 -1.55 1.73
3 B7001 4.663 -0.69 -3.10 -0.61 1.73
3 C5161 4.663 -0.69 -3.10 -1.11 1.73
   
Study 1, 2008 (May - Jun)  
   
1 A1705 0.052 -6.73 -20.87 -5.25 7.41
1 B5257 0.052 -6.73 -20.87 -11.33 7.41
1 C5436 0.052 -6.73 -20.87 -13.77 7.41
2 A6341 0.460 -1.94 -7.46 -2.51 3.58
2 B7435 0.460 -1.94 -7.46 -2.59 3.58
2 C0156 0.460 -1.94 -7.46 -1.72 3.58
3 A6416 4.888 -0.64 -2.78 -0.78 1.50
3 B7436 4.888 -0.64 -2.78 -0.63 1.50
3 C4419 4.888 -0.64 -2.78 -0.86 1.50
WEBB Sand Separation WEBB Fine Separation WEBB Suspended Sediment Concentration