USGS Home
Contact USGS
Search USGS
Link to USGS Home Page Branch of Quality Systems Homepage Sediment Laboratory Quality Assurance Project
Branch of Quality Systems | Home | Access Data | Submit Data | Order Samples | Publications | Project Contacts
SLQA Home Submit Data Order Samples Publications Project Contacts
USGS MISSOURI LABORATORY
Suspended Sediment Concentration 
Results include determination of suspended sediment concentration. 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).
    Suspended Sediment Concentration Results
Class Sample Target Suspended Median Percent  Lower Control Reported Laboratory  Upper Control
  Id Sediment  Difference  Limit  Results Percent  Limit 
    Concentration (mg/L) (%) (%) Difference (%) (%)
Study 1, 1997 (Jul - Aug)  
1 A1106 252 -3.60 -13.21 0.24 6.01
1 B1234 271 -3.60 -13.21 -4.87 6.01
1 C6262 184 -3.60 -13.21 0.95 6.01
2 A1606 503 -3.38 -14.40 -0.95 7.64
2 B1734 525 -3.38 -14.40 -1.68 7.64
2 C1862 359 -3.38 -14.40 0.35 7.64
3 A1106 10768 -0.36 -8.85 0.02 8.13
3 B1234 11414 -0.36 -8.85 -1.87 8.13
3 C6262 7560 -0.36 -8.85 -0.36 8.13
   
Study 2, 1997 (Nov - Dec)  
1 A2610 257 -2.91 -10.81 10.59 4.99
1 B2738 268 -2.91 -10.81 2.61 4.99
1 C2866 183 -2.91 -10.81 1.09 4.99
2 A2610 503 -3.77 -13.12 -0.24 5.59
2 B2738 532 -3.77 -13.12 -1.01 5.59
2 C2866 355 -3.77 -13.12 0.28 5.59
3 A2610 10764 -0.72 -3.81 -0.50 2.38
3 B2738 11405 -0.72 -3.81 -0.22 2.38
3 C2866 6561 -0.72 -3.81 -0.29 2.38
   
Study 1, 1998 (May - Jun)  
1 A6222 186 -4.86 -16.80 -1.61 7.09
1 B6351 166 -4.86 -16.80 -2.11 7.09
1 C6478 249 -4.86 -16.80 -2.01 7.09
2 A6723 360 -5.48 -17.52 -1.47 6.55
2 B6650 339 -5.48 -17.52 2.81 6.55
2 C6579 471 -5.48 -17.52 -0.07 6.55
3 A5022 7695 -1.27 -16.04 -0.15 13.50
3 B6751 8102 -1.27 -16.04 -0.80 13.50
3 C6878 10058 -1.27 -16.04 0.06 13.50
   
Study 2, 1998 (Oct - Dec)  
1 A6222 90 -2.06 -17.51 -1.40 13.40
1 B6361 202 -2.06 -17.51 -0.37 13.40
1 C6478 271 -2.06 -17.51 2.34 13.40
2 A6723 172 -2.38 -11.60 -5.74 6.83
2 B6650 350 -2.38 -11.60 0.43 6.83
2 C6579 503 -2.38 -11.60 0.00 6.83
3 A1422 3615 -0.28 -3.08 -0.42 2.52
3 B6751 8115 -0.28 -3.08 0.05 2.52
3 C6878 9096 -0.28 -3.08 0.19 2.52
   
Study 1, 1999 (Apr - May)  
1 A1311 276 -2.19 -13.76 -0.72 9.38
1 B1440 292 -2.19 -13.76 1.51 9.38
1 C4675 147 -2.19 -13.76 -1.36 9.38
2 A5051 533 -2.97 -9.67 -1.35 3.72
2 B5182 572 -2.97 -9.67 0.52 3.72
2 C0763 301 -2.97 -9.67 1.00 3.72
3 A2586 10118 -0.43 -4.07 -4.82 3.22
3 B2411 10860 -0.43 -4.07 -0.69 3.22
3 C4176 5246 -0.43 -4.07 -0.32 3.22
   
Study 2, 1999 (Sep - Oct)  
1 A1918 304 -2.54 -16.98 -1.48 11.90
1 B2078 340 -2.54 -16.98 -3.68 11.90
1 C2135 268 -2.54 -16.98 -1.49 11.90
2 A1922 627 -1.25 -11.52 22.37 9.02
2 B2037 826 -1.25 -11.52 -1.76 9.02
2 C2167 869 -1.25 -11.52 -18.99 9.02
3 A2119 13948 -0.71 -4.22 -0.02 2.79
3 B2242 14596 -0.71 -4.22 0.49 2.79
3 C2372 12372 -0.71 -4.22 0.53 2.79
   
Study 1, 2000 (May - Jun)  
1 A0606 440 -2.87 -11.78 -3.75 6.03
1 B3636 453 -2.87 -11.78 -1.32 6.03
1 C6666 387 -2.87 -11.78 -2.53 6.03
2 A0606 1140 -1.63 -8.81 0.61 5.56
2 B3636 1166 -1.63 -8.81 1.16 5.56
2 C6666 976 -1.63 -8.81 0.61 5.56
3 A1010 12656 -0.05 -3.89 0.66 3.80
3 B3636 13204 -0.05 -3.89 0.58 3.80
3 C6666 11005 -0.05 -3.89 0.45 3.80
   
Study 2, 2000 (Oct - Nov)  
1 A0909 564 10.49 -105.07 -11.70 126.05
1 B3636 589 10.49 -105.07 85.40 126.05
1 C6666 415 10.49 -105.07 9.73 126.05
2 A0606 1272 2.06 -45.61 4.68 49.72
2 B3636 1288 2.06 -45.61 9.39 49.72
2 C6666 920 2.06 -45.61 17.78 49.72
3 A0606 14007 -0.92 -5.78 -1.10 3.93
3 B3636 14636 -0.92 -5.78 -0.41 3.93
3 C6666 10434 -0.92 -5.78 -2.83 3.93
   
Study 1, 2001 (Jul - Sep)  
1 A1111 587 -2.17 -10.36 -1.53 6.02
1 B4141 593 -2.17 -10.36 -2.19 6.02
1 C7171 421 -2.17 -10.36 -1.74 6.02
2 A2015 1728 -1.73 -5.96 -1.19 2.49
2 B4143 1755 -1.73 -5.96 0.40 2.49
2 C8085 1251 -1.73 -5.96 -1.55 2.49
3 A1320 13564 -0.34 -3.89 0.52 3.22
3 B6040 14045 -0.34 -3.89 0.03 3.22
3 C6275 10001 -0.34 -3.89 0.17 3.22
   
Study 2, 2001 (Oct - Jan)  
1 A2530 431 -1.44 -20.24 5.54 17.35
1 B4059 459 -1.44 -20.24 2.67 17.35
1 C8589 324 -1.44 -20.24 4.74 17.35
2 0619 1423 -2.30 -8.73 0.84 4.13
2 B4040 1438 -2.30 -8.73 0.45 4.13
2 C8566 1025 -2.30 -8.73 0.85 4.13
3 A0717 12335 -0.46 -4.76 -0.22 3.83
3 B4238 12981 -0.46 -4.76 -0.14 3.83
3 C8966 9168 -0.46 -4.76 0.95 3.83
   
Study 1, 2002 (Jul - Sep)  
1 A2402 331 -0.89 -22.90 -3.88 21.12
1 B3844 340 -0.89 -22.90 0.93 21.12
1 C6470 244 -0.89 -22.90 0.83 21.12
2 A2530 718 -2.79 -10.92 -1.35 5.34
2 B3539 746 -2.79 -10.92 -2.14 5.34
2 C7566 518 -2.79 -10.92 -2.89 5.34
3 A2729 12411 -0.89 -4.38 0.23 2.59
3 B5234 12999 -0.89 -4.38 -0.48 2.59
3 C6672 9066 -0.89 -4.38 0.23 2.59
   
Study 2, 2002 (Nov - Dec)  
1 A1420 358 -0.68 -12.20 20.84 10.85
1 B5445 371 -0.68 -12.20 18.76 10.85
1 C6981 397 -0.68 -12.20 22.42 10.85
2 A1716 577 -0.92 -13.18 13.44 11.35
2 B4348 592 -0.92 -13.18 9.29 11.35
2 C7376 637 -0.92 -13.18 11.86 11.35
3 A2820 8108 0.09 -5.67 2.24 5.85
3 B3545 8323 0.09 -5.67 -1.60 5.85
3 C8071 9221 0.09 -5.67 1.47 5.85
   
Study 1, 2003 (Jun - Aug)  
1 A4537 289 -3.28 -10.76 -0.53 4.19
1 B2959 310 -3.28 -10.76 1.12 4.19
1 C0914 324 -3.28 -10.76 -0.45 4.19
2 A2911 1009 -2.46 -6.83 -4.13 1.90
2 B4009 1102 -2.46 -6.83 -0.94 1.90
2 C5821 1157 -2.46 -6.83 -1.05 1.90
3 A0351 8103 -0.73 -3.58 0.03 2.12
3 B4603 9026 -0.73 -3.58 0.19 2.12
3 C4157 9258 -0.73 -3.58 -0.25 2.12
   
Study 2, 2003 (Dec - Feb)  
1 A5801 140 -3.00 -17.79 6.09 11.80
1 B2416 138 -3.00 -17.79 7.44 11.80
1 C0337 152 -3.00 -17.79 -2.31 11.80
2 A5845 1029 -1.50 -4.79 -0.62 1.79
2 B0338 1030 -1.50 -4.79 2.17 1.79
2 C5632 1121 -1.50 -4.79 -0.39 1.79
3 A2409 10268 -0.57 -3.27 0.41 2.13
3 B1748 10268 -0.57 -3.27 2.65 2.13
3 C4118 11202 -0.57 -3.27 0.39 2.13
   
Study 1, 2004 (Jun - Jul)  
1 A5902 249 -4.33 -14.73 6.21 6.07
1 B3737 249 -4.33 -14.73 2.97 6.07
1 C1608 249 -4.33 -14.73 2.74 6.07
2 A3917 2402 -1.44 -6.38 1.24 3.51
2 B4455 2401 -1.44 -6.38 1.35 3.51
2 C0408 2404 -1.44 -6.38 1.51 3.51
3 A2352 5777 -0.72 -3.94 0.51 2.49
3 B2031 5777 -0.72 -3.94 0.76 2.49
3 C3011 5776 -0.72 -3.94 0.61 2.49
   
Study 2, 2004 (Nov - Dec)  
1 A2639 166 -4.85 -21.37 -2.26 11.66
1 B5440 166 -4.85 -21.37 0.48 11.66
1 C1019 181 -4.85 -21.37 1.66 11.66
2 A4267 1835 -2.08 -8.96 -1.01 4.80
2 B6250 1835 -2.08 -8.96 0.76 4.80
2 C1758 1835 -2.08 -8.96 -0.77 4.80
3 A6422 8802 -0.91 -4.25 -1.60 2.43
3 B1106 8801 -0.91 -4.25 -1.39 2.43
3 C0112 6601 -0.91 -4.25 -0.08 2.43
   
Study 1, 2005 (May - Jul)  
1 A5009 401 -2.84 -10.41 -4.60 4.73
1 B3263 401 -2.84 -10.41 -1.50 4.73
1 C6737 481 -2.84 -10.41 -8.17 4.73
2 A5823 1201 -3.44 -12.11 -4.85 5.22
2 B5458 1201 -3.44 -12.11 -4.48 5.22
2 C5965 1601 -3.44 -12.11 -5.74 5.22
3 A0546 9002 -1.89 -6.68 -0.05 2.90
3 B4840 9002 -1.89 -6.68 -0.72 2.90
3 C6268 9003 -1.89 -6.68 -0.21 2.90
   
Study 2, 2005 (Nov - Dec)  
1 A3524 134 -4.94 -23.19 4.56 13.31
1 B1017 134 -4.94 -23.19 -0.45 13.31
1 C2026 134 -4.94 -23.19 -1.82 13.31
2 A0338 3300 -1.39 -4.23 -1.10 1.46
2 B1532 3301 -1.39 -4.23 -0.83 1.46
2 C7512 3301 -1.39 -4.23 -0.49 1.46
3 A3415 9689 -2.05 -7.14 -0.86 3.04
3 B1337 9690 -2.05 -7.14 -0.47 3.04
3 C5875 9690 -2.05 -7.14 -0.58 3.04
   
Study 1, 2006 (May - Jun)  
1 A6958 187 -3.20 -11.20 -2.05 4.70
1 B6213 187 -3.20 -11.20 -1.03 4.70
1 C0268 187 -3.20 -11.20 -1.73 4.70
2 A6842 2400 -1.10 -5.20 -0.43 3.00
2 B1303 2400 -1.10 -5.20 0.39 3.00
2 C2015 2400 -1.10 -5.20 -0.40 3.00
3 A0215 9800 -1.80 -6.90 -0.25 3.30
3 B7869 9800 -1.80 -6.90 -0.48 3.30
3 C7732 9800 -1.80 -6.90 -0.25 3.30
   
Study 2, 2006 (Oct - Nov)  
1 A7156 161 -3.20 -16.20 2.76 9.90
1 B0916 161 -3.20 -16.20 4.26 9.90
1 C4441 161 -3.20 -16.20 4.87 9.90
2 A6634 1545 -1.30 -6.00 0.16 3.50
2 B2709 1545 -1.30 -6.00 0.09 3.50
2 C3436 1545 -1.30 -6.00 0.65 3.50
3 A8461 10333 -0.50 -3.60 0.69 2.70
3 B5915 10333 -0.50 -3.60 0.35 2.70
3 C4667 10333 -0.50 -3.60 0.29 2.70
   
Study 1, 2007 (Apr - May)  
   
1 A1146 200 -5.20 -21.46 -2.05 11.09
1 B7755 200 -5.20 -21.46 1.21 11.09
1 C3248 200 -5.20 -21.46 3.17 11.09
2 A5758 3983 -1.49 -4.57 0.14 1.60
2 B2919 3983 -1.49 -4.57 0.28 1.60
2 C3365 3983 -1.49 -4.57 0.31 1.60
3 A6655 10075 -1.35 -4.69 -0.30 2.00
3 B7065 10075 -1.35 -4.69 -0.41 2.00
3 C3401 10075 -1.35 -4.69 -0.27 2.00
   
Study 2, 2007 (Nov - Dec)  
   
1 A6941 138 -6.19 -22.16 4.56 9.77
1 B1063 138 -6.19 -22.16 -0.19 9.77
1 C1974 138 -6.19 -22.16 3.76 9.77
2 A0471 1249 -2.17 -7.93 -0.42 3.59
2 B5068 1249 -2.17 -7.93 -1.03 3.59
2 C2002 1249 -2.17 -7.93 -0.49 3.59
3 A0818 10362 -1.20 -4.47 -0.42 2.08
3 B1715 10362 -1.20 -4.47 -0.44 2.08
3 C0333 10362 -1.20 -4.47 -0.31 2.08
   
Study 1, 2008 (May - Jun)  
   
1 A5921 116 -6.86 -20.14 12.57 6.42
1 B5772 116 -6.86 -20.14 12.38 6.42
1 C4827 116 -6.86 -20.14 7.95 6.42
2 A4222 1022 -2.07 -7.31 1.21 3.18
2 B1239 1022 -2.07 -7.31 1.34 3.18
2 C1143 1022 -2.07 -7.31 0.79 3.18
3 A4610 10862 -1.21 -3.72 -0.25 1.31
3 B1457 10862 -1.21 -3.72 -0.07 1.31
3 C1845 10862 -1.21 -3.72 -0.04 1.31
MO Sand Separation MO Fine Separation MO Sediment Mass Results