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USGS KENTUCKY 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 A1004 256 -3.60 -13.21 -3.76 6.01
1 B1136 276 -3.60 -13.21 -0.94 6.01
1 C1260 185 -3.60 -13.21 -4.07 6.01
2 A1004 504 -3.38 -14.40 -5.75 7.64
2 B1136 527 -3.38 -14.40 -3.07 7.64
2 C1260 358 -3.38 -14.40 2.03 7.64
3 A0704 10764 -0.36 -8.85 -0.59 8.13
3 B0836 11413 -0.36 -8.85 0.76 8.13
3 C6060 7557 -0.36 -8.85 -2.87 8.13
   
Study 2, 1997 (Nov - Dec)  
1 A208 258 -2.91 -10.81 -2.09 4.99
1 B2136 272 -2.91 -10.81 -3.68 4.99
1 C2264 187 -2.91 -10.81 -2.54 4.99
2 A208 496 -3.77 -13.12 -4.64 5.59
2 B2136 529 -3.77 -13.12 -3.74 5.59
2 C2264 356 -3.77 -13.12 -1.97 5.59
3 A208 10764 -0.72 -3.81 -0.60 2.38
3 B2136 11403 -0.72 -3.81 -0.91 2.38
3 C2264 6562 -0.72 -3.81 1.04 2.38
   
Study 1, 1998 (May - Jun)  
1 A5620 189 -4.86 -16.80 -3.39 7.09
1 B5753 166 -4.86 -16.80 -6.17 7.09
1 C5876 247 -4.86 -16.80 -4.86 7.09
2 A7325 363 -5.48 -17.52 -5.55 6.55
2 B7248 329 -5.48 -17.52 -6.31 6.55
2 C7181 469 -5.48 -17.52 -1.07 6.55
3 A4820 7693 -1.27 -16.04 -2.37 13.50
3 B6353 8139 -1.27 -16.04 -1.83 13.50
3 C6476 10079 -1.27 -16.04 -7.34 13.50
   
Study 2, 1998 (Oct - Dec)  
1 A5620 90 -2.06 -17.51 -7.08 13.40
1 B5759 202 -2.06 -17.51 1.24 13.40
1 C5876 267 -2.06 -17.51 -0.50 13.40
2 A7325 173 -2.38 -11.60 -0.89 6.83
2 B7248 348 -2.38 -11.60 2.30 6.83
2 C7181 506 -2.38 -11.60 -0.53 6.83
3 A1220 3613 -0.28 -3.08 -0.69 2.52
3 B6353 8123 -0.28 -3.08 0.02 2.52
3 C6476 9103 -0.28 -3.08 0.72 2.52
   
Study 1, 1999 (Apr - May)  
1 A0807 276 -2.19 -13.76 -0.94 9.38
1 B0936 291 -2.19 -13.76 3.51 9.38
1 C4473 145 -2.19 -13.76 0.28 9.38
2 A4647 524 -2.97 -9.67 0.69 3.72
2 B4778 565 -2.97 -9.67 -2.51 3.72
2 C0561 306 -2.97 -9.67 -4.96 3.72
3 A2166 10117 -0.43 -4.07 0.82 3.22
3 B0807 10849 -0.43 -4.07 -0.45 3.22
3 C3974 5245 -0.43 -4.07 0.28 3.22
   
Study 2, 1999 (Sep - Oct)  
1 A1041 330 -2.54 -16.98 -3.64 11.90
1 B1171 321 -2.54 -16.98 0.31 11.90
1 C1514 244 -2.54 -16.98 -0.41 11.90
2 A1013 793 -1.25 -11.52 0.95 9.02
2 B1134 835 -1.25 -11.52 0.12 9.02
2 C1264 704 -1.25 -11.52 -0.57 9.02
3 A1210 13959 -0.71 -4.22 0.30 2.79
3 B1336 14586 -0.71 -4.22 -0.59 2.79
3 C1466 12398 -0.71 -4.22 0.02 2.79
   
Study 1, 2000 (May - Jun)  
1 A0404 440 -2.87 -11.78 -4.21 6.03
1 B3434 466 -2.87 -11.78 -1.93 6.03
1 C6464 383 -2.87 -11.78 0.84 6.03
2 A0404 -1.63 -8.81 5.56
2 B3434 1175 -1.63 -8.81 -2.13 5.56
2 C6464 976 -1.63 -8.81 -0.78 5.56
3 A0808 12652 -0.05 -3.89 -0.41 3.80
3 B3434 13203 -0.05 -3.89 -0.02 3.80
3 C6464 11003 -0.05 -3.89 -0.03 3.80
   
Study 2, 2000 (Oct - Nov)  
1 A0707 561 10.49 -105.07 -0.80 126.05
1 B3434 590 10.49 -105.07 67.97 126.05
1 C6464 419 10.49 -105.07 13.60 126.05
2 A1919 1268 2.06 -45.61 9.62 49.72
2 B3434 1291 2.06 -45.61 -1.63 49.72
2 C6464 917 2.06 -45.61 0.58 49.72
3 A0404 13956 -0.92 -5.78 -0.40 3.93
3 B3434 14632 -0.92 -5.78 -0.90 3.93
3 C6464 10394 -0.92 -5.78 1.98 3.93
   
Study 1, 2001 (Jul - Sep)  
1 A0909 594 -2.17 -10.36 5.14 6.02
1 B3939 598 -2.17 -10.36 3.26 6.02
1 C6969 418 -2.17 -10.36 -0.08 6.02
2 A2211 1728 -1.73 -5.96 1.30 2.49
2 B3947 1753 -1.73 -5.96 2.11 2.49
2 C8283 1250 -1.73 -5.96 -0.03 2.49
3 A1022 13564 -0.34 -3.89 -0.47 3.22
3 B5644 14042 -0.34 -3.89 -0.30 3.22
3 C8581 10001 -0.34 -3.89 2.99 3.22
   
Study 2, 2001 (Oct - Jan)  
1 A2302 454 -1.44 -20.24 11.29 17.35
1 B4134 461 -1.44 -20.24 23.41 17.35
1 C8366 344 -1.44 -20.24 30.09 17.35
1 A0520 448 -1.44 -20.24 1.06 17.35
1 B3539 464 -1.44 -20.24 9.91 17.35
1 C6688 332 -1.44 -20.24 4.47 17.35
2 A0520 1415 -2.30 -8.73 2.44 4.13
2 B4139 1437 -2.30 -8.73 7.88 4.13
2 C8665 1024 -2.30 -8.73 10.31 4.13
2 A1114 1418 -2.30 -8.73 -1.28 4.13
2 B3545 1451 -2.30 -8.73 -0.75 4.13
2 C8071 1025 -2.30 -8.73 7.37 4.13
3 A2621 12324 -0.46 -4.76 0.62 3.83
3 B5353 12983 -0.46 -4.76 -4.49 3.83
3 C6871 9169 -0.46 -4.76 2.85 3.83
3 A3024 12311 -0.46 -4.76 -0.09 3.83
3 B3951 12985 -0.46 -4.76 0.12 3.83
3 C7273 9175 -0.46 -4.76 -0.39 3.83
   
Study 1, 2002 (Jul - Sep)  
1 A0327 330 -0.89 -22.90 6.22 21.12
1 B4342 345 -0.89 -22.90 -2.84 21.12
1 C7571 244 -0.89 -22.90 18.26 21.12
2 A2125 718 -2.79 -10.92 -0.25 5.34
2 B3955 744 -2.79 -10.92 -2.53 5.34
2 C7375 518 -2.79 -10.92 -1.80 5.34
3 A0530 12398 -0.89 -4.38 0.01 2.59
3 B4749 13003 -0.89 -4.38 -0.03 2.59
3 C7669 9074 -0.89 -4.38 -1.37 2.59
   
Study 2, 2002 (Nov - Dec)  
1 A2416 358 -0.68 -12.20 -2.51 10.85
1 B3831 369 -0.68 -12.20 0.14 10.85
1 C8367 398 -0.68 -12.20 1.38 10.85
2 A0410 579 -0.92 -13.18 -2.85 11.35
2 B6058 593 -0.92 -13.18 -0.84 11.35
2 C6461 635 -0.92 -13.18 -0.63 11.35
3 A2701 8109 0.09 -5.67 -0.11 5.85
3 B5456 8324 0.09 -5.67 0.19 5.85
3 C8164 9223 0.09 -5.67 3.55 5.85
   
Study 1, 2003 (Jun - Aug)  
1 A2754 288 -3.28 -10.76 -3.92 4.19
1 B5725 309 -3.28 -10.76 -4.31 4.19
1 C1838 325 -3.28 -10.76 -3.24 4.19
2 A4236 1010 -2.46 -6.83 -2.77 1.90
2 B1026 1101 -2.46 -6.83 -2.86 1.90
2 C2639 1158 -2.46 -6.83 -2.41 1.90
3 A1933 8103 -0.73 -3.58 -0.41 2.12
3 B2838 9028 -0.73 -3.58 -0.42 2.12
3 C0806 9258 -0.73 -3.58 -3.11 2.12
   
Study 2, 2003 (Dec - Feb)  
1 A4149 138 -3.00 -17.79 -2.90 11.80
1 B4328 140 -3.00 -17.79 -4.46 11.80
1 C5615 151 -3.00 -17.79 -1.82 11.80
2 A2723 1032 -1.50 -4.79 -2.78 1.79
2 B1511 1029 -1.50 -4.79 -2.17 1.79
2 C0416 1122 -1.50 -4.79 -2.29 1.79
3 A3541 10268 -0.57 -3.27 -0.36 2.13
3 B0408 10270 -0.57 -3.27 -0.35 2.13
3 C5115 11203 -0.57 -3.27 -0.45 2.13
   
Study 1, 2004 (Jun - Jul)  
1 A4018 248 -4.33 -14.73 -5.83 6.07
1 B5819 248 -4.33 -14.73 -2.35 6.07
1 C0942 248 -4.33 -14.73 -3.26 6.07
2 A4036 2403 -1.44 -6.38 -1.15 3.51
2 B5413 2404 -1.44 -6.38 -0.06 3.51
2 C5047 2400 -1.44 -6.38 -1.76 3.51
3 A1430 5777 -0.72 -3.94 -0.59 2.49
3 B5558 5777 -0.72 -3.94 0.18 2.49
3 C5757 5778 -0.72 -3.94 0.16 2.49
   
Study 2, 2004 (Nov - Dec)  
1 A6904 166 -4.85 -21.37 -1.78 11.66
1 B6462 166 -4.85 -21.37 -4.04 11.66
1 C5467 181 -4.85 -21.37 -12.73 11.66
2 A6152 1835 -2.08 -8.96 -1.52 4.80
2 B4903 1836 -2.08 -8.96 -1.40 4.80
2 C4630 1836 -2.08 -8.96 0.86 4.80
3 A2658 8802 -0.91 -4.25 -0.80 2.43
3 B3061 8801 -0.91 -4.25 -0.59 2.43
3 C3947 6601 -0.91 -4.25 -0.54 2.43
   
Study 1, 2005 (May - Jul)  
1 A7113 401 -2.84 -10.41 0.14 4.73
1 B4815 401 -2.84 -10.41 -1.49 4.73
1 C1827 482 -2.84 -10.41 -1.26 4.73
2 A2030 1202 -3.44 -12.11 -1.07 5.22
2 B6757 1202 -3.44 -12.11 -0.52 5.22
2 C3801 1601 -3.44 -12.11 -0.47 5.22
3 A5472 9003 -1.89 -6.68 0.05 2.90
3 B3844 9003 -1.89 -6.68 0.48 2.90
3 C4027 9001 -1.89 -6.68 -1.08 2.90
   
Study 2, 2005 (Nov - Dec)  
1 A1406 134 -4.94 -23.19 -3.46 13.31
1 B2459 134 -4.94 -23.19 -3.44 13.31
1 C6939 134 -4.94 -23.19 -7.90 13.31
2 A5125 3300 -1.39 -4.23 -1.83 1.46
2 B6856 3301 -1.39 -4.23 -1.04 1.46
2 C0839 3301 -1.39 -4.23 -0.71 1.46
3 A2661 9689 -2.05 -7.14 -0.92 3.04
3 B6127 9690 -2.05 -7.14 -0.02 3.04
3 C3958 9690 -2.05 -7.14 -0.69 3.04
   
Study 1, 2006 (May - Jun)  
1 A2855 187 -3.20 -11.20 -2.85 4.70
1 B4808 187 -3.20 -11.20 -3.67 4.70
1 C0920 187 -3.20 -11.20 -3.28 4.70
2 A2669 2400 -1.10 -5.20 -0.71 3.00
2 B1508 2400 -1.10 -5.20 -0.38 3.00
2 C1448 2400 -1.10 -5.20 -2.85 3.00
3 A5046 9800 -1.80 -6.90 4.85 3.30
3 B0961 9800 -1.80 -6.90 -4.00 3.30
3 C8133 9800 -1.80 -6.90 1.42 3.30
   
Study 2, 2006 (Oct - Nov)  
1 A4281 161 -3.20 -16.20 -1.83 9.90
1 B3808 161 -3.20 -16.20 -2.11 9.90
1 C3347 161 -3.20 -16.20 -2.26 9.90
2 A1310 1545 -1.30 -6.00 -0.71 3.50
2 B2848 1545 -1.30 -6.00 -0.71 3.50
2 C7202 1545 -1.30 -6.00 -0.78 3.50
3 A3411 10333 -0.50 -3.60 -0.35 2.70
3 B4969 10333 -0.50 -3.60 0.70 2.70
3 C6027 10333 -0.50 -3.60 0.87 2.70
   
Study 1, 2007 (Apr - May)  
   
1 A6568 200 -5.20 -21.46 -3.43 11.09
1 B1929 200 -5.20 -21.46 -2.83 11.09
1 C4713 200 -5.20 -21.46 -2.64 11.09
2 A3162 3983 -1.49 -4.57 -0.74 1.60
2 B0522 3983 -1.49 -4.57 -0.79 1.60
2 C3510 3983 -1.49 -4.57 -0.74 1.60
3 A4060 10075 -1.35 -4.69 0.73 2.00
3 B3766 10075 -1.35 -4.69 2.11 2.00
3 C1673 10075 -1.35 -4.69 1.32 2.00
   
Study 2, 2007 (Nov - Dec)  
   
1 A3460 138 -6.19 -22.16 -7.70 9.77
1 B6864 138 -6.19 -22.16 -6.19 9.77
1 C3801 138 -6.19 -22.16 -6.01 9.77
2 A0606 1249 -2.17 -7.93 -2.17 3.59
2 B5142 1249 -2.17 -7.93 -1.70 3.59
2 C5846 1249 -2.17 -7.93 -1.82 3.59
3 A7223 10362 -1.20 -4.47 1.16 2.08
3 B2637 10362 -1.20 -4.47 1.02 2.08
3 C1549 10362 -1.20 -4.47 -0.23 2.08
   
Study 1, 2008 (May - Jun)  
   
1 A1373 116 -6.86 -20.14 -3.74 6.42
1 B5059 116 -6.86 -20.14 -0.86 6.42
1 C3316 116 -6.86 -20.14 -2.33 6.42
2 A5969 1022 -2.07 -7.31 -1.56 3.18
2 B2940 1022 -2.07 -7.31 -1.42 3.18
2 C2673 1022 -2.07 -7.31 -1.41 3.18
3 A2128 10862 -1.21 -3.72 1.51 1.31
3 B1929 10862 -1.21 -3.72 0.92 1.31
3 C0647 10862 -1.21 -3.72 0.14 1.31
KY Sand Separation KY Fine Separation KY Sediment Mass Results