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USGS MISSOURI LABORATORY
Fine Sediment Separation Results
Results include determination of fine material (<0.063 mm) mass for each SLQA study. A highlighted value exceeds study's
control limits, for a specific size class. Laboratories analyze 9 samples in each study. 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).
    Fine Material Mass Results
Class Sample Target Fine Median Percent  Lower Control Reported Laboratory  Upper Control
  Id Material Mass  Difference  Limit  Results Percent  Limit 
    (g) (%) (%) Difference (%) (%)
Study 1, 1997 (Jul - Aug)  
1 A1106 0.058 -5.93 -14.51 2.65
1 B1234 0.058 -5.93 -14.51 2.65
1 C6262 0.058 -5.93 -14.51 -5.07 2.65
2 A1606 0.116 -6.33 -15.27 2.61
2 B1734 0.116 -6.33 -15.27 2.61
2 C1862 0.116 -6.33 -15.27 -3.88 2.61
3 A1106 2.300 -1.67 -6.36 3.02
3 B1234 2.300 -1.67 -6.36 3.02
3 C6262 2.700 -1.67 -6.36 -1.40 3.02
   
Study 2, 1997 (Nov - Dec)  
1 A2610 0.058 -6.60 -16.30 -7.67 3.09
1 B2738 0.058 -6.60 -16.30 -13.88 3.09
1 C2866 0.058 -6.60 -16.30 -6.42 3.09
2 A2610 0.116 -6.73 -17.41 -8.47 3.96
2 B2738 0.116 -6.73 -17.41 -11.19 3.96
2 C2866 0.116 -6.73 -17.41 -8.38 3.96
3 A2610 2.300 -2.00 -3.58 -2.21 -0.41
3 B2738 2.300 -2.00 -3.58 -2.89 -0.41
3 C2866 2.700 -2.00 -3.58 -2.23 -0.41
   
Study 1, 1998 (May - Jun)  
1 A6222 0.058 -7.80 -17.43 -8.06 1.83
1 B6351 0.058 -7.80 -17.43 -14.70 1.83
1 C6478 0.058 -7.80 -17.43 -7.61 1.83
2 A6723 0.116 -7.21 -14.04 -7.00 -0.38
2 B6650 0.116 -7.21 -14.04 -1.28 -0.38
2 C6579 0.116 -7.21 -14.04 -8.20 -0.38
3 A5022 2.300 -2.11 -11.15 -1.47 6.94
3 B6751 2.700 -2.11 -11.15 -1.74 6.94
3 C6878 2.700 -2.11 -11.15 -1.43 6.94
   
Study 2, 1998 (Oct - Dec)  
1 A6222 0.061 -6.19 -24.59 -6.49 12.21
1 B6361 0.061 -6.19 -24.59 -5.16 12.21
1 C6478 0.061 -6.19 -24.59 3.10 12.21
2 A6723 0.120 -4.82 -15.52 -7.34 5.88
2 B6650 0.120 -4.82 -15.52 -2.96 5.88
2 C6579 0.120 -4.82 -15.52 -1.68 5.88
3 A1422 2.400 -2.61 -9.15 -3.91 3.94
3 B6751 2.600 -2.61 -9.15 -1.29 3.94
3 C6878 2.600 -2.61 -9.15 -0.93 3.94
   
Study 1, 1999 (Apr - May)  
1 A1311 0.061 -7.01 -18.45 -7.01 4.43
1 B1440 0.061 -7.01 -18.45 -6.86 4.43
1 C4675 0.058 -7.01 -18.45 3.41 4.43
2 A5051 0.116 -5.46 -12.10 -2.23 1.18
2 B5182 0.116 -5.46 -12.10 -2.75 1.18
2 C0763 0.120 -5.46 -12.10 -2.48 1.18
3 A2586 2.400 -3.25 -10.36 -3.80 3.86
3 B2411 2.400 -3.25 -10.36 -3.34 3.86
3 C4176 2.300 -3.25 -10.36 -1.86 3.86
   
Study 2, 1999 (Sep - Oct)  
1 A1918 0.060 -4.30 -16.72 -5.23 8.11
1 B2078 0.060 -4.30 -16.72 -9.81 8.11
1 C2135 0.060 -4.30 -16.72 -5.57 8.11
2 A1922 0.150 -4.90 -11.96 -7.09 2.16
2 B2037 0.150 -4.90 -11.96 -5.05 2.16
2 C2167 0.150 -4.90 -11.96 -4.93 2.16
3 A2119 2.500 -1.40 -6.87 -1.80 4.08
3 B2242 2.500 -1.40 -6.87 -2.68 4.08
3 C2372 2.500 -1.40 -6.87 -5.60 4.08
   
Study 1, 2000 (May - Jun)  
1 A0606 0.080 -4.49 -13.45 -5.24 4.46
1 B3636 0.080 -4.49 -13.45 -1.80 4.46
1 C6666 0.080 -4.49 -13.45 -2.96 4.46
2 A0606 0.200 -3.10 -11.51 -0.59 5.32
2 B3636 0.200 -3.10 -11.51 -1.48 5.32
2 C6666 0.200 -3.10 -11.51 -2.95 5.32
3 A1010 2.200 0.21 -3.65 0.21 4.07
3 B3636 2.200 0.21 -3.65 1.08 4.07
3 C6666 2.200 0.21 -3.65 -0.03 4.07
   
Study 2, 2000 (Oct - Nov)  
1 A0909 0.100 14.84 -126.98 -17.07 156.66
1 B3636 0.100 14.84 -126.98 101.08 156.66
1 C6666 0.100 14.84 -126.98 14.36 156.66
2 A0606 0.220 1.74 -49.81 3.80 53.30
2 B3636 0.220 1.74 -49.81 9.49 53.30
2 C6666 0.220 1.74 -49.81 20.01 53.30
3 A0606 2.500 -1.25 -6.34 -1.30 3.83
3 B3636 2.500 -1.25 -6.34 -1.31 3.83
3 C6666 2.500 -1.25 -6.34 -5.23 3.83
   
Study 1, 2001 (Jul - Sep)  
1 A1111 0.100 -3.85 -9.98 -2.83 2.29
1 B4141 0.100 -3.85 -9.98 -2.96 2.29
1 C7171 0.100 -3.85 -9.98 -3.36 2.29
2 A2015 0.300 -2.74 -7.03 -1.37 1.55
2 B4143 0.300 -2.74 -7.03 -0.62 1.55
2 C8085 0.300 -2.74 -7.03 -2.30 1.55
3 A1320 2.400 -1.45 -6.51 -0.08 3.60
3 B6040 2.400 -1.45 -6.51 -0.18 3.60
3 C6275 2.400 -1.45 -6.51 -0.47 3.60
   
Study 2, 2001 (Oct - Jan)  
1 A2530 0.080 -3.97 -30.28 3.24 22.34
1 B4059 0.080 -3.97 -30.28 2.43 22.34
1 C8589 0.080 -3.97 -30.28 3.10 22.34
2 A0619 0.250 -3.79 -13.27 0.20 5.69
2 B4040 0.250 -3.79 -13.27 -1.37 5.69
2 C8566 0.250 -3.79 -13.27 -1.95 5.69
3 A0717 2.200 -1.46 -6.53 -0.50 3.62
3 B4238 2.200 -1.46 -6.53 -0.31 3.62
3 C8966 2.200 -1.46 -6.53 -0.42 3.62
   
Study 1, 2002 (Jul - Sep)  
1 A2402 0.060 -2.71 -18.16 -4.21 12.74
1 B3844 0.060 -2.71 -18.16 -3.07 12.74
1 C6470 0.060 -2.71 -18.16 -4.69 12.74
2 A2530 0.128 -3.75 -9.71 -3.58 2.21
2 B3539 0.128 -3.75 -9.71 -3.67 2.21
2 C7566 0.128 -3.75 -9.71 -5.15 2.21
3 A2729 2.185 -1.17 -4.14 -1.53 1.81
3 B5234 2.185 -1.17 -4.14 -0.95 1.81
3 C6672 2.185 -1.17 -4.14 -1.86 1.81
   
Study 2, 2002 (Nov - Dec)  
1 A1420 0.065 -2.46 -10.34 18.52 5.42
1 B5445 0.065 -2.46 -10.34 19.75 5.42
1 C6981 0.065 -2.46 -10.34 25.08 5.42
2 A1716 0.105 -3.37 -10.32 11.94 3.58
2 B4348 0.105 -3.37 -10.32 6.76 3.58
2 C7376 0.105 -3.37 -10.32 10.83 3.58
3 A2820 2.222 -0.79 -4.26 0.76 2.67
3 B3545 2.222 -0.79 -4.26 0.74 2.67
3 C8071 2.222 -0.79 -4.26 0.78 2.67
   
Study 1, 2003 (Jun - Aug)  
1 A4537 0.090 -5.14 -12.32 -3.04 2.04
1 B2959 0.090 -5.14 -12.32 -1.04 2.04
1 C0914 0.090 -5.14 -12.32 -1.29 2.04
2 A2911 0.185 -3.36 -8.25 -3.08 1.53
2 B4009 0.185 -3.36 -8.25 -1.63 1.53
2 C5821 0.185 -3.36 -8.25 -1.30 1.53
3 A0351 2.700 -1.03 -3.14 -0.11 1.08
3 B4603 2.700 -1.03 -3.14 -0.51 1.08
3 C4157 2.700 -1.03 -3.14 -0.56 1.08
   
Study 2, 2003 (Dec - Feb)  
1 A5801 0.050 -2.70 -13.09 4.95 7.70
1 B2416 0.050 -2.70 -13.09 5.99 7.70
1 C0337 0.050 -2.70 -13.09 -1.38 7.70
2 A5845 0.280 -2.32 -6.05 -1.68 1.41
2 B0338 0.280 -2.32 -6.05 1.39 1.41
2 C5632 0.280 -2.32 -6.05 -0.50 1.41
3 A2409 2.800 -0.44 -2.61 -0.10 1.73
3 B1748 2.800 -0.44 -2.61 0.00 1.73
3 C4118 2.800 -0.44 -2.61 -0.22 1.73
   
Study 1, 2004 (Jun - Jul)  
1 A5902 0.090 -3.86 -11.17 2.00 3.44
1 B3737 0.090 -3.86 -11.17 2.12 3.44
1 C1608 0.090 -3.86 -11.17 2.04 3.44
2 A3917 0.300 -2.06 -5.87 0.26 1.75
2 B4455 0.300 -2.06 -5.87 0.22 1.75
2 C0408 0.300 -2.06 -5.87 0.52 1.75
3 A2352 2.200 -0.81 -4.23 0.02 2.61
3 B2031 2.200 -0.81 -4.23 0.17 2.61
3 C3011 2.200 -0.81 -4.23 0.13 2.61
   
Study 2, 2004 (Nov - Dec)  
1 A2639 0.060 -4.41 -11.97 -2.15 3.14
1 B5440 0.060 -4.41 -11.97 1.31 3.14
1 C1019 0.060 -4.41 -11.97 1.61 3.14
2 A4267 0.250 -3.45 -8.36 -2.08 1.46
2 B6250 0.250 -3.45 -8.36 -0.34 1.46
2 C1758 0.250 -3.45 -8.36 -1.26 1.46
3 A6422 2.400 -1.51 -4.31 -2.14 1.30
3 B1106 2.400 -1.51 -4.31 -1.48 1.30
3 C0112 2.400 -1.51 -4.31 -0.81 1.30
   
Study 1, 2005 (May - Jul)  
1 A5009 0.100 -7.38 -22.51 -15.44 7.75
1 B3263 0.100 -7.38 -22.51 -14.90 7.75
1 C6737 0.100 -7.38 -22.51 -28.04 7.75
2 A5823 0.200 -8.95 -31.95 -23.10 14.05
2 B5458 0.200 -8.95 -31.95 -20.34 14.05
2 C5965 0.200 -8.95 -31.95 -20.49 14.05
3 A0546 3.000 -1.90 -6.25 -0.74 2.46
3 B4840 3.000 -1.90 -6.25 -0.84 2.46
3 C6268 3.000 -1.90 -6.25 -0.84 2.46
   
Study 2, 2005 (Nov - Dec)  
1 A3524 0.050 -11.25 -42.95 -21.97 20.44
1 B1017 0.050 -11.25 -42.95 -20.65 20.44
1 C2026 0.050 -11.25 -42.95 -20.40 20.44
2 A0338 1.350 -9.06 -54.76 -27.77 36.64
2 B1532 1.350 -9.06 -54.76 -36.86 36.64
2 C7512 1.350 -9.06 -54.76 -33.06 36.64
3 A3415 4.000 -2.07 -7.40 -2.11 3.26
3 B1337 4.000 -2.07 -7.40 -1.38 3.26
3 C5875 4.000 -2.07 -7.40 -1.65 3.26
   
Study 1, 2006 (May - Jun)  
1 A6958 0.070 -9.10 -30.60 -28.88 12.50
1 B6213 0.070 -9.10 -30.60 -19.39 12.50
1 C0268 0.070 -9.10 -30.60 -18.94 12.50
2 A6842 0.900 -7.30 -48.60 -23.33 34.00
2 B1303 0.900 -7.30 -48.60 -22.27 34.00
2 C2015 0.900 -7.30 -48.60 -23.56 34.00
3 A0215 4.200 -1.60 -6.90 -0.73 3.70
3 B7869 4.200 -1.60 -6.90 -1.07 3.70
3 C7732 4.200 -1.60 -6.90 -0.80 3.70
   
Study 2, 2006 (Oct - Nov)  
1 A7156 0.062 -8.30 -26.70 -12.76 10.00
1 B0916 0.062 -8.30 -26.70 -12.95 10.00
1 C4441 0.062 -8.30 -26.70 -7.97 10.00
2 A6634 0.600 -6.80 -24.20 -13.08 10.70
2 B2709 0.600 -6.80 -24.20 -17.83 10.70
2 C3436 0.600 -6.80 -24.20 -15.33 10.70
3 A8461 4.000 -0.50 -6.60 0.17 5.60
3 B5915 4.000 -0.50 -6.60 -0.02 5.60
3 C4667 4.000 -0.50 -6.60 -0.16 5.60
   
Study 1, 2007 (Apr - May)  
   
1 A1146 0.075 -3.87 -8.31 3.96 0.57
1 B7755 0.075 -3.87 -8.31 5.11 0.57
1 C3248 0.075 -3.87 -8.31 2.99 0.57
2 A5758 1.700 -0.77 -2.46 0.29 0.93
2 B2919 1.700 -0.77 -2.46 0.42 0.93
2 C3365 1.700 -0.77 -2.46 0.41 0.93
3 A6655 4.100 -1.22 -4.92 -0.51 2.48
3 B7065 4.100 -1.22 -4.92 -0.52 2.48
3 C3401 4.100 -1.22 -4.92 -0.41 2.48
   
Study 2, 2007 (Nov - Dec)  
   
1 A6941 0.055 -6.83 -23.39 1.77 9.73
1 B1063 0.055 -6.83 -23.39 -0.16 9.73
1 C1974 0.055 -6.83 -23.39 2.03 9.73
2 A0471 0.500 -3.40 -11.08 -2.79 4.28
2 B5068 0.500 -3.40 -11.08 -3.19 4.28
2 C2002 0.500 -3.40 -11.08 -2.96 4.28
3 A0818 4.150 -0.48 -2.73 0.01 1.77
3 B1715 4.150 -0.48 -2.73 -0.16 1.77
3 C0333 4.150 -0.48 -2.73 0.05 1.77
   
Study 1, 2008 (May - Jun)  
   
1 A5921 0.045 -5.25 -17.09 11.63 6.60
1 B5772 0.045 -5.25 -17.09 14.15 6.60
1 C4827 0.045 -5.25 -17.09 10.79 6.60
2 A4222 0.400 -2.02 -5.82 1.58 1.80
2 B1239 0.400 -2.02 -5.82 1.51 1.80
2 C1143 0.400 -2.02 -5.82 0.78 1.80
3 A4610 4.250 -0.22 -2.99 0.15 2.55
3 B1457 4.250 -0.22 -2.99 0.35 2.55
3 C1845 4.250 -0.22 -2.99 0.18 2.55
MO Sand Separation MO Sediment Mass Results MO Suspended Sediment Concentration