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USGS CALIFORNIA 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 
    (gm) (%) (%) Difference (%) (%)
Study 1, 1997 (Jul - Aug)        
1 A0101 0.063 -4.40 -14.90 -2.22 6.10
1 B0238 0.068 -4.40 -14.90 -2.37 6.10
1 C0357 0.075 -4.40 -14.90 -4.26 6.10
2 A0101 0.127 -5.10 -16.71 -4.03 6.51
2 B0239 0.131 -5.10 -16.71 -3.42 6.51
2 C0357 0.143 -5.10 -16.71 -4.35 6.51
3 A0101 2.691 -1.84 -14.68 -1.46 11.00
3 B0239 2.854 -1.84 -14.68 -1.67 11.00
3 C5757 3.024 -1.84 -14.68 -1.84 11.00
   
Study 2, 1997 (Nov - Dec)  
1 A115 0.063 -4.54 -13.05 -3.33 3.97
1 B1233 0.070 -4.54 -13.05 -5.76 3.97
1 C1361 0.075 -4.54 -13.05 -7.03 3.97
2 A115 0.125 -4.77 -13.18 -7.53 3.65
2 B1233 0.133 -4.77 -13.18 -6.08 3.65
2 C1361 0.143 -4.77 -13.18 -4.84 3.65
3 A115 2.692 -1.38 -3.93 -1.00 1.18
3 B1233 2.853 -1.38 -3.93 -0.85 1.18
3 C1361 2.626 -1.38 -3.93 -1.73 1.18
   
Study 1, 1998 (May - Jun)  
1 A4717 0.064 -5.15 -12.89 -4.38 2.58
1 B4856 0.067 -5.15 -12.89 -3.87 2.58
1 C4973 0.072 -5.15 -12.89 -8.66 2.58
2 A8228 0.125 -4.82 -13.31 -3.21 3.66
2 B8145 0.134 -4.82 -13.31 -4.56 3.66
2 C8084 0.142 -4.82 -13.31 -6.34 3.66
3 A0617 2.689 -1.70 -6.98 -1.54 3.59
3 B5756 3.250 -1.70 -6.98 -1.02 3.59
3 C5873 3.024 -1.70 -6.98 -0.81 3.59
   
Study 2, 1998 (Oct - Dec)  
1 A4717 0.070 -3.28 -18.43 -11.43 11.87
1 B4856 0.072 -3.28 -18.43 -6.56 11.87
1 C4973 0.082 -3.28 -18.43 -8.31 11.87
2 A8228 0.129 -3.91 -11.54 -9.98 3.71
2 B8145 0.144 -3.91 -11.54 -9.36 3.71
2 C8084 0.151 -3.91 -11.54 -6.90 3.71
3 A0917 2.709 -1.00 -3.58 -2.91 1.57
3 B5756 3.246 -1.00 -3.58 -0.82 1.57
3 C5873 2.731 -1.00 -3.58 -1.10 1.57
   
Study 1, 1999 (Apr - May)  
1 A0101 0.072 -3.90 -13.19 -3.34 5.39
1 B0332 0.076 -3.90 -13.19 -3.31 5.39
1 C3770 0.074 -3.90 -13.19 -9.83 5.39
2 A4041 0.132 -4.51 -8.94 -5.00 -0.09
2 B4172 0.142 -4.51 -8.94 -4.71 -0.09
2 C0157 0.154 -4.51 -8.94 -4.34 -0.09
3 A0359 2.530 -1.24 -3.28 -0.91 0.80
3 B0101 2.710 -1.24 -3.28 -1.24 0.80
3 C3671 2.622 -1.24 -3.28 -1.37 0.80
   
Study 2, 1999 (Sep - Oct)  
1 A0134 0.069 -3.67 -15.00 -2.03 7.66
1 B0206 0.061 -3.67 -15.00 -3.47 7.66
1 C0367 0.060 -3.67 -15.00 -6.47 7.66
2 A0104 0.160 -3.25 -12.78 -4.94 6.29
2 B0231 0.181 -3.25 -12.78 -2.82 6.29
2 C0361 0.178 -3.25 -12.78 -5.96 6.29
3 A0301 2.791 -0.75 -4.59 -0.32 3.08
3 B0431 2.926 -0.75 -4.59 0.00 3.08
3 C0561 3.089 -0.75 -4.59 -2.69 3.08
   
Study 1, 2000 (May - Jun)  
1 A0101 0.088 -4.36 -10.87 -1.82 2.16
1 B3131 0.093 -4.36 -10.87 -4.52 2.16
1 C6161 0.099 -4.36 -10.87 -5.08 2.16
2 A0101 0.224 -3.09 -9.45 -0.04 3.26
2 B3131 0.239 -3.09 -9.45 -1.88 3.26
2 C6161 0.244 -3.09 -9.45 -2.99 3.26
3 A0505 2.531 -0.76 -2.78 -0.75 1.26
3 B3131 2.640 -0.76 -2.78 -0.16 1.26
3 C6161 2.750 -0.76 -2.78 -0.81 1.26
   
Study 2, 2000 (Oct - Nov)  
1 A0404 0.112 13.84 -110.48 -6.07 138.16
1 B3131 0.121 13.84 -110.48 -9.19 138.16
1 C6161 0.126 13.84 -110.48 44.75 138.16
2 A1616 0.253 3.70 -47.40 18.95 54.80
2 B3131 0.257 3.70 -47.40 -3.70 54.80
2 C6161 0.276 3.70 -47.40 0.54 54.80
3 A0101 2.791 -1.02 -4.15 -0.96 2.10
3 B3131 2.924 -1.02 -4.15 -0.95 2.10
3 C6161 3.132 -1.02 -4.15 1.07 2.10
   
Study 1, 2001 (Jul - Sep)  
1 A0202 0.118 -2.82 -10.90 -2.04 5.27
1 B3232 0.120 -2.82 -10.90 -2.41 5.27
1 C6262 0.126 -2.82 -10.90 -4.54 5.27
2 A2927 0.345 -2.08 -5.64 -2.44 1.48
2 B3233 0.351 -2.08 -5.64 -0.63 1.48
2 C8976 0.376 -2.08 -5.64 -1.62 1.48
3 A2129 2.713 -0.54 -3.56 -0.28 2.49
3 B4258 2.809 -0.54 -3.56 -0.62 2.49
3 C6490 3.000 -0.54 -3.56 -0.85 2.49
   
Study 2, 2001 (Oct - Jan)  
1 A1609 0.089 -1.43 -24.02 -5.44 21.16
1 B4648 0.092 -1.43 -24.02 -9.02 21.16
1 C7387 0.100 -1.43 -24.02 -8.36 21.16
2 A3005 0.283 -2.67 -9.23 -9.12 3.88
2 B4634 0.291 -2.67 -9.23 -5.47 3.88
2 C6180 0.310 -2.67 -9.23 -4.76 3.88
3 AA0411 2.462 -0.63 -3.17 -0.27 1.91
3 B4534 2.602 -0.63 -3.17 -0.23 1.91
3 C8670 2.750 -0.63 -3.17 0.08 1.91
   
Study 1, 2002 (Jul - Sep)  
1 A2106 0.066 -1.20 -14.06 -4.46 11.65
1 B3255 0.069 -1.20 -14.06 -2.72 11.65
1 C7076 0.073 -1.20 -14.06 -3.54 11.65
2 A0712 0.144 -3.15 -11.34 -1.76 5.04
2 B5344 0.149 -3.15 -11.34 -0.47 5.04
2 C6663 0.155 -3.15 -11.34 -3.43 5.04
3 AA082 2.481 -0.62 -2.97 -0.05 1.74
3 B4143 2.600 -0.62 -2.97 -0.46 1.74
3 C7778 2.721 -0.62 -2.97 -4.93 1.74
   
Study 2, 2002 (Nov - Dec)  
1 A2002 0.072 -2.11 -12.77 -1.53 8.55
1 B5249 0.074 -2.11 -12.77 -0.54 8.55
1 C7075 0.080 -2.11 -12.77 -7.54 8.55
2 A2029 0.116 -2.17 -13.47 -6.38 9.13
2 B4843 0.118 -2.17 -13.47 -1.01 9.13
2 C8088 0.127 -2.17 -13.47 4.25 9.13
3 A2318 2.432 -0.32 -2.70 0.80 2.07
3 B5038 2.497 -0.32 -2.70 1.11 2.07
3 C7872 2.767 -0.32 -2.70 0.08 2.07
   
Study 1, 2003 (Jun - Aug)  
1 A0748 0.101 -3.85 -10.65 -5.54 2.95
1 B6044 0.109 -3.85 -10.65 -0.35 2.95
1 C3446 0.114 -3.85 -10.65 -3.31 2.95
2 A5755 0.202 -2.95 -7.07 -2.66 1.17
2 B3534 0.220 -2.95 -7.07 -1.66 1.17
2 C5057 0.231 -2.95 -7.07 -2.85 1.17
3 A0131 2.836 -0.81 -2.70 -1.36 1.07
3 B1523 3.159 -0.81 -2.70 -0.72 1.07
3 C5229 3.240 -0.81 -2.70 -0.65 1.07
   
Study 2, 2003 (Dec - Feb)  
1 A5457 0.055 -3.87 -18.67 -1.45 10.93
1 B3152 0.056 -3.87 -18.67 1.43 10.93
1 C1224 0.060 -3.87 -18.67 3.50 10.93
2 A2060 0.309 -2.12 -5.65 -1.62 1.41
2 B5426 0.310 -2.12 -5.65 -1.13 1.41
2 C3531 0.336 -2.12 -5.65 -0.83 1.41
3 A3829 3.081 -0.57 -2.23 0.00 1.09
3 B1502 3.081 -0.57 -2.23 -0.03 1.09
3 C2004 3.361 -0.57 -2.23 -0.03 1.09
   
Study 1, 2004 (Jun - Jul)  
1 A2753 0.100 -5.02 -13.98 -5.08 3.93
1 B0113 0.100 -5.02 -13.98 -4.66 3.93
1 C3610 0.099 -5.02 -13.98 -1.68 3.93
2 A0124 0.361 -2.05 -6.89 -1.72 2.79
2 B2139 0.361 -2.05 -6.89 -1.79 2.79
2 C1620 0.360 -2.05 -6.89 -0.82 2.79
3 A6003 2.310 -0.96 -3.68 -0.19 1.75
3 B5423 2.311 -0.96 -3.68 0.58 1.75
3 C5041 2.311 -0.96 -3.68 0.30 1.75
   
Study 2, 2004 (Nov - Dec)  
1 A5964 0.066 -5.01 -20.47 -0.38 10.44
1 B3402 0.066 -5.01 -20.47 -2.16 10.44
1 C1345 0.072 -5.01 -20.47 -1.97 10.44
2 A6663 0.276 -2.82 -10.38 -1.68 4.73
2 B0324 0.276 -2.82 -10.38 -1.55 4.73
2 C5904 0.275 -2.82 -10.38 -2.03 4.73
3 A6839 2.640 -1.07 -3.72 -0.72 1.57
3 B1004 2.640 -1.07 -3.72 -0.60 1.57
3 C4013 2.640 -1.07 -3.72 -0.30 1.57
   
Study 1, 2005 (May - Jul)  
1 A4161 0.120 -2.96 -10.38 -1.12 4.46
1 B1623 0.121 -2.96 -10.38 -0.95 4.46
1 C7032 0.120 -2.96 -10.38 -1.92 4.46
2 A1946 0.240 -3.48 -11.39 -1.35 4.43
2 B6364 0.240 -3.48 -11.39 -0.22 4.43
2 C7143 0.240 -3.48 -11.39 -1.58 4.43
3 A2711 3.600 -1.69 -5.99 -3.27 2.62
3 B5202 3.602 -1.69 -5.99 -3.40 2.62
3 C4112 3.601 -1.69 -5.99 -3.65 2.62
   
Study 2, 2005 (Nov - Dec)  
1 A3631 0.060 -5.77 -23.84 -10.80 12.29
1 B0618 0.060 -5.77 -23.84 -5.25 12.29
1 C4147 0.060 -5.77 -23.84 -0.17 12.29
2 A5901 1.485 -1.82 -4.56 -1.50 0.92
2 B1334 1.485 -1.82 -4.56 -1.30 0.92
2 C6341 1.485 -1.82 -4.56 -1.13 0.92
3 A2416 4.360 -2.19 -7.07 -4.19 2.68
3 B0346 4.361 -2.19 -7.07 -3.19 2.68
3 C2845 4.361 -2.19 -7.07 -2.98 2.68
   
Study 1, 2006 (May - Jun)  
1 A3464 0.084 -3.90 -11.30 -3.83 3.60
1 B7302 0.084 -3.90 -11.30 -4.96 3.60
1 C6704 0.084 -3.90 -11.30 -3.87 3.60
2 A5232 1.080 -1.50 -5.40 -1.59 2.40
2 B2847 1.080 -1.50 -5.40 -1.45 2.40
2 C5170 1.080 -1.50 -5.40 -1.00 2.40
3 A7604 4.410 -1.70 -5.50 -4.59 2.10
3 B5603 4.410 -1.70 -5.50 -2.46 2.10
3 C1126 4.410 -1.70 -5.50 -3.57 2.10
   
Study 2, 2006 (Oct - Nov)  
1 A7640 0.072 -3.90 -16.40 -3.91 8.50
1 B0875 0.072 -3.90 -16.40 -2.84 8.50
1 C5229 0.072 -3.90 -16.40 -2.81 8.50
2 A5113 0.695 -2.00 -6.40 -1.53 2.40
2 B7723 0.695 -2.00 -6.40 -1.65 2.40
2 C5831 0.695 -2.00 -6.40 -1.42 2.40
3 A7823 4.650 -0.60 -2.90 -2.76 1.70
3 B7460 4.650 -0.60 -2.90 -1.11 1.70
3 C1056 4.650 -0.60 -2.90 -0.95 1.70
   
Study 1, 2007 (Apr - May)  
   
1 A4473 0.090 -5.23 -20.25 -5.26 9.80
1 B2142 0.090 -5.23 -20.25 -2.20 9.80
1 C3860 0.090 -5.23 -20.25 -2.95 9.80
2 A1828 1.780 -1.18 -3.94 -0.81 1.58
2 B1955 1.780 -1.18 -3.94 -0.43 1.58
2 C3720 1.780 -1.18 -3.94 -0.68 1.58
3 A5249 4.500 -0.81 -3.78 -2.15 2.17
3 B2072 4.500 -0.81 -3.78 -1.72 2.17
3 C7812 4.500 -0.81 -3.78 -1.65 2.17
   
Study 2, 2007 (Nov - Dec)  
   
1 A6322 0.062 -6.08 -23.79 -6.86 11.62
1 B1529 0.062 -6.08 -23.79 -5.91 11.62
1 C1221 0.062 -6.08 -23.79 -7.26 11.62
2 A5272 0.562 -1.85 -7.39 -1.90 3.70
2 B7040 0.562 -1.85 -7.39 -1.56 3.70
2 C3874 0.562 -1.85 -7.39 -1.67 3.70
3 A4104 4.663 -0.69 -3.10 -1.28 1.73
3 B2269 4.663 -0.69 -3.10 -1.82 1.73
3 C2425 4.663 -0.69 -3.10 0.45 1.73
   
Study 1, 2008 (May - Jun)  
   
1 A3745 0.052 -6.73 -20.87 -2.72 7.41
1 B5651 0.052 -6.73 -20.87 -2.18 7.41
1 C7138 0.052 -6.73 -20.87 -2.63 7.41
2 A6152 0.460 -1.94 -7.46 -1.90 3.58
2 B6813 0.460 -1.94 -7.46 -1.29 3.58
2 C4725 0.460 -1.94 -7.46 -1.54 3.58
3 A4750 4.888 -0.64 -2.78 -1.58 1.50
3 B5459 4.888 -0.64 -2.78 -1.86 1.50
3 C6733 4.888 -0.64 -2.78 -1.82 1.50
CA Sand Separation CA Fine Separation CA Suspended Sediment Concentration