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USGS CALIFORNIA 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 Mass Difference  Limit  Results Percent  Limit 
    Mass (gm) (%) (%) Difference (%) (%)
Study 1, 1997 (Jul - Aug)        
1 A0101 0.058 -5.93 -14.51 -4.65 2.65
1 B0238 0.058 -5.93 -14.51 -5.06 2.65
1 C0357 0.058 -5.93 -14.51 -6.03 2.65
2 A0101 0.116 -6.33 -15.27 -5.09 2.61
2 B0239 0.116 -6.33 -15.27 -4.94 2.61
2 C0357 0.116 -6.33 -15.27 -5.92 2.61
3 A0101 2.300 -1.67 -6.36 -2.02 3.02
3 B0239 2.300 -1.67 -6.36 -2.45 3.02
3 C5757 2.700 -1.67 -6.36 -2.16 3.02
   
Study 2, 1997 (Nov - Dec)  
1 A115 0.058 -6.60 -16.30 -2.83 3.09
1 B1233 0.058 -6.60 -16.30 -7.06 3.09
1 C1361 0.058 -6.60 -16.30 -8.93 3.09
2 A115 0.116 -6.73 -17.41 -6.73 3.96
2 B1233 0.116 -6.73 -17.41 -6.34 3.96
2 C1361 0.116 -6.73 -17.41 -6.54 3.96
3 A115 2.300 -2.00 -3.58 -1.53 -0.41
3 B1233 2.300 -2.00 -3.58 -1.63 -0.41
3 C1361 2.700 -2.00 -3.58 -1.32 -0.41
   
Study 1, 1998 (May - Jun)  
1 A4717 0.058 -7.80 -17.43 -5.35 1.83
1 B4856 0.058 -7.80 -17.43 -5.47 1.83
1 C4973 0.058 -7.80 -17.43 -9.87 1.83
2 A8228 0.116 -7.21 -14.04 -3.94 -0.38
2 B8145 0.116 -7.21 -14.04 -5.52 -0.38
2 C8084 0.116 -7.21 -14.04 -8.46 -0.38
3 A0617 2.300 -2.11 -11.15 -2.11 6.94
3 B5756 2.700 -2.11 -11.15 -1.07 6.94
3 C5873 2.700 -2.11 -11.15 -1.16 6.94
   
Study 2, 1998 (Oct - Dec)  
1 A4717 0.061 -6.19 -24.59 -13.14 12.21
1 B4856 0.061 -6.19 -24.59 -12.08 12.21
1 C4973 0.061 -6.19 -24.59 -11.98 12.21
2 A8228 0.120 -4.82 -15.52 -10.02 5.88
2 B8145 0.120 -4.82 -15.52 -9.05 5.88
2 C8084 0.120 -4.82 -15.52 -9.23 5.88
3 A0917 2.400 -2.61 -9.15 -6.78 3.94
3 B5756 2.600 -2.61 -9.15 -3.39 3.94
3 C5873 2.600 -2.61 -9.15 -2.44 3.94
   
Study 1, 1999 (Apr - May)  
1 A0101 0.061 -7.01 -18.45 -6.58 4.43
1 B0332 0.061 -7.01 -18.45 -7.16 4.43
1 C3770 0.058 -7.01 -18.45 -10.67 4.43
2 A4041 0.116 -5.46 -12.10 -5.46 1.18
2 B4172 0.116 -5.46 -12.10 -6.24 1.18
2 C0157 0.120 -5.46 -12.10 -6.24 1.18
3 A0359 2.400 -3.25 -10.36 -4.95 3.86
3 B0101 2.400 -3.25 -10.36 -4.06 3.86
3 C3671 2.300 -3.25 -10.36 -1.01 3.86
   
Study 2, 1999 (Sep - Oct)  
1 A0134 0.060 -4.30 -16.72 -4.14 8.11
1 B0206 0.060 -4.30 -16.72 -2.13 8.11
1 C0367 0.060 -4.30 -16.72 -6.75 8.11
2 A0104 0.150 -4.90 -11.96 -5.84 2.16
2 B0231 0.150 -4.90 -11.96 -4.20 2.16
2 C0361 0.150 -4.90 -11.96 -6.99 2.16
3 A0301 2.500 -1.40 -6.87 -0.75 4.08
3 B0431 2.500 -1.40 -6.87 -0.70 4.08
3 C0561 2.500 -1.40 -6.87 -3.53 4.08
   
Study 1, 2000 (May - Jun)  
1 A0101 0.080 -4.49 -13.45 -2.81 4.46
1 B3131 0.080 -4.49 -13.45 -4.74 4.46
1 C6161 0.080 -4.49 -13.45 -5.24 4.46
2 A0101 0.200 -3.10 -11.51 0.55 5.32
2 B3131 0.200 -3.10 -11.51 -2.64 5.32
2 C6161 0.200 -3.10 -11.51 -1.73 5.32
3 A0505 2.200 0.21 -3.65 0.46 4.07
3 B3131 2.200 0.21 -3.65 0.61 4.07
3 C.6161 2.200 0.21 -3.65 1.65 4.07
   
Study 2, 2000 (Oct - Nov)  
1 A0404 0.100 14.84 -126.98 -6.47 156.66
1 B3131 0.100 14.84 -126.98 -13.00 156.66
1 C6161 0.100 14.84 -126.98 55.73 156.66
2 A1616 0.220 1.74 -49.81 23.99 53.30
2 B3131 0.220 1.74 -49.81 -4.34 53.30
2 C6161 0.220 1.74 -49.81 1.74 53.30
3 A0101 2.500 -1.25 -6.34 -1.26 3.83
3 B3131 2.500 -1.25 -6.34 -1.47 3.83
3 C6161 2.500 -1.25 -6.34 2.25 3.83
   
Study 1, 2001 (Jul - Sep)  
1 A0202 0.100 -3.85 -9.98 -3.84 2.29
1 B3232 0.100 -3.85 -9.98 -3.01 2.29
1 C6262 0.100 -3.85 -9.98 -6.20 2.29
2 A2927 0.300 -2.74 -7.03 -2.41 1.55
2 B3233 0.300 -2.74 -7.03 -1.20 1.55
2 C8976 0.300 -2.74 -7.03 -1.68 1.55
3 A2129 2.400 -1.45 -6.51 -0.83 3.60
3 B4258 2.400 -1.45 -6.51 -1.15 3.60
3 C6490 2.400 -1.45 -6.51 -0.86 3.60
   
Study 2, 2001 (Oct - Jan)  
1 A1609 0.080 -3.97 -30.28 -5.71 22.34
1 B4648 0.080 -3.97 -30.28 -9.34 22.34
1 C7387 0.080 -3.97 -30.28 -6.80 22.34
2 A3005 0.250 -3.79 -13.27 -8.47 5.69
2 B4634 0.250 -3.79 -13.27 -6.60 5.69
2 C6180 0.250 -3.79 -13.27 -6.56 5.69
3 A0411 2.200 -1.46 -6.53 -0.65 3.62
3 B4534 2.200 -1.46 -6.53 0.29 3.62
3 C8670 2.200 -1.46 -6.53 0.09 3.62
   
Study 1, 2002 (Jul - Sep)  
1 A2106 0.060 -2.71 -18.16 -5.26 12.74
1 B3255 0.060 -2.71 -18.16 -4.19 12.74
1 C7076 0.060 -2.71 -18.16 -4.69 12.74
2 A0712 0.128 -3.75 -9.71 -2.60 2.21
2 B5344 0.128 -3.75 -9.71 -2.15 2.21
2 C6663 0.128 -3.75 -9.71 -4.65 2.21
3 AA082 2.185 -1.17 -4.14 -0.16 1.81
3 B4143 2.185 -1.17 -4.14 -0.51 1.81
3 C7778 2.185 -1.17 -4.14 -5.32 1.81
   
Study 2, 2002 (Nov - Dec)  
1 A2002 0.065 -2.46 -10.34 -0.93 5.42
1 B5249 0.065 -2.46 -10.34 -1.38 5.42
1 C7075 0.065 -2.46 -10.34 0.00 5.42
2 A2029 0.105 -3.37 -10.32 -6.95 3.58
2 B4843 0.105 -3.37 -10.32 -1.81 3.58
2 C8088 0.105 -3.37 -10.32 -1.62 3.58
3 A2318 2.222 -0.79 -4.26 0.41 2.67
3 B5038 2.222 -0.79 -4.26 1.12 2.67
3 C7872 2.222 -0.79 -4.26 0.91 2.67
   
Study 1, 2003 (Jun - Aug)  
1 A0748 0.090 -5.14 -12.32 -4.81 2.04
1 B6044 0.090 -5.14 -12.32 -2.74 2.04
1 C3446 0.090 -5.14 -12.32 -3.74 2.04
2 A5755 0.185 -3.36 -8.25 -3.44 1.53
2 B3534 0.185 -3.36 -8.25 -2.85 1.53
2 C5057 0.185 -3.36 -8.25 -2.84 1.53
3 A0131 2.700 -1.03 -3.14 -1.60 1.08
3 B1523 2.700 -1.03 -3.14 -0.10 1.08
3 C5229 2.700 -1.03 -3.14 -1.04 1.08
   
Study 2, 2003 (Dec - Feb)  
1 A5457 0.050 -2.70 -13.09 -2.20 7.70
1 B3152 0.050 -2.70 -13.09 0.39 7.70
1 C1224 0.050 -2.70 -13.09 2.80 7.70
2 A2060 0.280 -2.32 -6.05 -1.60 1.41
2 B5426 0.280 -2.32 -6.05 -1.28 1.41
2 C3531 0.280 -2.32 -6.05 -0.64 1.41
3 A3829 2.800 -0.44 -2.61 0.04 1.73
3 B1502 2.800 -0.44 -2.61 0.01 1.73
3 C2004 2.800 -0.44 -2.61 0.15 1.73
   
Study 1, 2004 (Jun - Jul)  
1 A2753 0.090 -3.86 -11.17 -3.41 3.44
1 B0113 0.090 -3.86 -11.17 -1.17 3.44
1 C3610 0.090 -3.86 -11.17 -1.73 3.44
2 A0124 0.300 -2.06 -5.87 -1.13 1.75
2 B2139 0.300 -2.06 -5.87 0.13 1.75
2 C1620 0.300 -2.06 -5.87 -1.24 1.75
3 A6003 2.200 -0.81 -4.23 -0.11 2.61
3 B5423 2.200 -0.81 -4.23 0.56 2.61
3 C5041 2.200 -0.81 -4.23 0.37 2.61
   
Study 2, 2004 (Nov - Dec)  
1 A5964 0.060 -4.41 -11.97 -2.19 3.14
1 B3402 0.060 -4.41 -11.97 -3.06 3.14
1 C1345 0.060 -4.41 -11.97 -3.21 3.14
2 A6663 0.250 -3.45 -8.36 -1.13 1.46
2 B0324 0.250 -3.45 -8.36 -2.21 1.46
2 C5904 0.250 -3.45 -8.36 -2.51 1.46
3 A6839 2.400 -1.51 -4.31 -1.53 1.30
3 B1004 2.400 -1.51 -4.31 -1.05 1.30
3 C4013 2.400 -1.51 -4.31 -0.52 1.30
   
Study 1, 2005 (May - Jul)  
1 A4161 0.100 -7.38 -22.51 0.20 7.75
1 B1623 0.100 -7.38 -22.51 -1.79 7.75
1 C7032 0.100 -7.38 -22.51 -2.59 7.75
2 A1946 0.200 -8.95 -31.95 -2.30 14.05
2 B6364 0.200 -8.95 -31.95 -0.65 14.05
2 C7143 0.200 -8.95 -31.95 -2.40 14.05
3 A2711 3.000 -1.90 -6.25 -3.98 2.46
3 B5202 3.000 -1.90 -6.25 -4.20 2.46
3 C4112 3.000 -1.90 -6.25 -4.50 2.46
   
Study 2, 2005 (Nov - Dec)  
1 A3631 0.050 -11.25 -42.95 -5.76 20.44
1 B0618 0.050 -11.25 -42.95 -5.46 20.44
1 C4147 0.050 -11.25 -42.95 -0.74 20.44
2 A5901 1.350 -9.06 -54.76 -2.22 36.64
2 B1334 1.350 -9.06 -54.76 -1.69 36.64
2 C6341 1.350 -9.06 -54.76 -1.62 36.64
3 A2416 4.000 -2.07 -7.40 -4.57 3.26
3 B0346 4.000 -2.07 -7.40 -3.60 3.26
3 C2845 4.000 -2.07 -7.40 -3.34 3.26
   
Study 1, 2006 (May - Jun)  
1 A3464 0.070 -9.10 -30.60 -4.91 12.50
1 B7302 0.070 -9.10 -30.60 -6.26 12.50
1 C6704 0.070 -9.10 -30.60 -4.72 12.50
2 A5232 0.900 -7.30 -48.60 -5.87 34.00
2 B2847 0.900 -7.30 -48.60 -6.00 34.00
2 C5170 0.900 -7.30 -48.60 -2.54 34.00
3 A7604 4.200 -1.60 -6.90 -4.63 3.70
3 B5603 4.200 -1.60 -6.90 -2.59 3.70
3 C1126 4.200 -1.60 -6.90 -3.73 3.70
   
Study 2, 2006 (Oct - Nov)  
1 A7640 0.062 -8.30 -26.70 -9.13 10.00
1 B0875 0.062 -8.30 -26.70 -8.67 10.00
1 C5229 0.062 -8.30 -26.70 -7.59 10.00
2 A5113 0.600 -6.80 -24.20 -7.57 10.70
2 B7723 0.600 -6.80 -24.20 -6.98 10.70
2 C5831 0.600 -6.80 -24.20 -5.82 10.70
3 A7823 4.000 -0.50 -6.60 -3.14 5.60
3 B7460 4.000 -0.50 -6.60 -1.32 5.60
3 C1056 4.000 -0.50 -6.60 -1.13 5.60
   
Study 1, 2007 (Apr - May)  
   
1 A4473 0.075 -3.87 -8.31 -3.42 0.57
1 B2142 0.075 -3.87 -8.31 -3.09 0.57
1 C3860 0.075 -3.87 -8.31 -3.44 0.57
2 A1828 1.700 -0.77 -2.46 -0.88 0.93
2 B1955 1.700 -0.77 -2.46 -0.50 0.93
2 C3720 1.700 -0.77 -2.46 -0.67 0.93
3 A5249 4.100 -1.22 -4.92 -2.61 2.48
3 B2072 4.100 -1.22 -4.92 -2.14 2.48
3 C7812 4.100 -1.22 -4.92 -2.13 2.48
   
Study 2, 2007 (Nov - Dec)  
   
1 A6322 0.055 -6.83 -23.39 -6.43 9.73
1 B1529 0.055 -6.83 -23.39 -6.43 9.73
1 C1221 0.055 -6.83 -23.39 -7.06 9.73
2 A5272 0.500 -3.40 -11.08 -2.12 4.28
2 B7040 0.500 -3.40 -11.08 -1.78 4.28
2 C3874 0.500 -3.40 -11.08 -2.04 4.28
3 A4104 4.150 -0.48 -2.73 -1.39 1.77
3 B2269 4.150 -0.48 -2.73 -2.00 1.77
3 C2425 4.150 -0.48 -2.73 0.52 1.77
   
Study 1, 2008 (May - Jun)  
   
1 A3745 0.045 -5.25 -17.09 -3.85 6.60
1 B5651 0.045 -5.25 -17.09 -2.66 6.60
1 C7138 0.045 -5.25 -17.09 -3.78 6.60
2 A6152 0.400 -2.02 -5.82 -1.62 1.80
2 B6813 0.400 -2.02 -5.82 -1.19 1.80
2 C4725 0.400 -2.02 -5.82 -1.48 1.80
3 A4750 4.250 -0.22 -2.99 -1.75 2.55
3 B5459 4.250 -0.22 -2.99 -1.97 2.55
3 C6733 4.250 -0.22 -2.99 -1.67 2.55
CA Sand Separation CA Sediment Mass Results CA Suspended Sediment Concentration