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USGS NEW MEXICO 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 A2208 256 -3.60 -13.21 7.25 6.01
1 B2332 270 -3.60 -13.21 0.22 6.01
1 C2464 184 -3.60 -13.21 -12.38 6.01
2 A2208 498 -3.38 -14.40 9.93 7.64
2 B2332 532 -3.38 -14.40 -1.95 7.64
2 C2464 356 -3.38 -14.40 -8.43 7.64
3 A1508 10759 -0.36 -8.85 -0.03 8.13
3 B1632 11405 -0.36 -8.85 0.91 8.13
3 C6464 7555 -0.36 -8.85 -1.32 8.13
   
Study 2, 1997 (Nov - Dec)  
1 A3212 262 -2.91 -10.81 8.40 4.99
1 B3340 275 -2.91 -10.81 -7.57 4.99
1 C3468 182 -2.91 -10.81 -4.95 4.99
2 A3212 505 -3.77 -13.12 -10.33 5.59
2 B3340 528 -3.77 -13.12 -0.83 5.59
2 C3468 353 -3.77 -13.12 -7.87 5.59
3 A3212 10767 -0.72 -3.81 2.38
3 B3340 11404 -0.72 -3.81 -4.05 2.38
3 C3468 6560 -0.72 -3.81 -1.18 2.38
   
Study 1, 1998 (May - Jun)  
1 A6824 183 -4.86 -16.80 -11.41 7.09
1 B6949 172 -4.86 -16.80 -17.56 7.09
1 C7080 240 -4.86 -16.80 -9.29 7.09
2 A6121 358 -5.48 -17.52 -7.75 6.55
2 B6052 334 -5.48 -17.52 -9.15 6.55
2 C5977 470 -5.48 -17.52 -4.61 6.55
3 A5224 7691 -1.27 -16.04 -4.87 13.50
3 B7149 8131 -1.27 -16.04 -0.09 13.50
3 C7280 10077 -1.27 -16.04 -2.49 13.50
   
Study 2, 1998 (Oct - Dec)  
1 A6824 91 -2.06 -17.51 25.92 13.40
1 B6963 203 -2.06 -17.51 0.74 13.40
1 C7080 261 -2.06 -17.51 8.18 13.40
2 A6121 175 -2.38 -11.60 4.77 6.83
2 B6052 355 -2.38 -11.60 5.35 6.83
2 C5977 514 -2.38 -11.60 5.38 6.83
3 A1624 3616 -0.28 -3.08 -0.03 2.52
3 B7149 8121 -0.28 -3.08 1.31 2.52
3 C4069 8429 -0.28 -3.08 1.07 2.52
   
Study 1, 1999 (Apr - May)  
1 A1886 276 -2.19 -13.76 3.26 9.38
1 B1731 294 -2.19 -13.76 -9.06 9.38
1 C4877 147 -2.19 -13.76 -0.41 9.38
2 A5455 536 -2.97 -9.67 1.68 3.72
2 B5589 573 -2.97 -9.67 2.13 3.72
2 C0965 306 -2.97 -9.67 4.51 3.72
3 A2990 10120 -0.43 -4.07 0.72 3.22
3 B2894 10842 -0.43 -4.07 -0.66 3.22
3 C4378 5248 -0.43 -4.07 0.06 3.22
   
Study 2, 1999 (Sep - Oct)  
1 A6704 309 -2.54 -16.98 20.06 11.90
1 B6839 325 -2.54 -16.98 24.62 11.90
1 C6973 267 -2.54 -16.98 7.95 11.90
2 A2506 810 -1.25 -11.52 9.82 9.02
2 B2650 813 -1.25 -11.52 10.89 9.02
2 C2769 694 -1.25 -11.52 6.13 9.02
3 A2702 13962 -0.71 -4.22 1.50 2.79
3 B6635 14600 -0.71 -4.22 2.23 2.79
3 C6776 12359 -0.71 -4.22 1.13 2.79
   
Study 1, 2000 (May - Jun)  
3 A1414 12651 -0.05 -3.89 3.80
3 B2323 12651 -0.05 -3.89 3.80
3 C8181 11068 -0.05 -3.89 3.80
   
Study 2, 2000 (Oct - Nov)  
1 A1111 569 10.49 -105.07 91.73 126.05
1 B3838 597 10.49 -105.07 -3.27 126.05
1 C6868 416 10.49 -105.07 10.49 126.05
2 A0808 1268 2.06 -45.61 19.87 49.72
2 B6060 1287 2.06 -45.61 24.29 49.72
2 C6868 921 2.06 -45.61 1.23 49.72
3 A0808 14000 -0.92 -5.78 -4.04 3.93
3 B3838 14643 -0.92 -5.78 -1.34 3.93
3 C6868 10436 -0.92 -5.78 -2.77 3.93
   
Study 2, 2001 (Oct - Jan)  
1 A1708 445 -1.44 -20.24 0.25 17.35
1 B4446 452 -1.44 -20.24 1.54 17.35
1 C7784 318 -1.44 -20.24 25.31 17.35
2 A0223 1403 -2.30 -8.73 1.45 4.13
2 B4436 1436 -2.30 -8.73 -0.03 4.13
2 C8962 1027 -2.30 -8.73 24.29 4.13
3 A2922 12306 -0.46 -4.76 -1.43 3.83
3 B5047 12987 -0.46 -4.76 -0.25 3.83
3 C7170 9166 -0.46 -4.76 0.95 3.83
   
Study 1, 2002 (Jul - Sep)  
1 A0109 330 -0.89 -22.90 -1.24 21.12
1 B3936 345 -0.89 -22.90 -4.54 21.12
1 C7174 246 -0.89 -22.90 2.06 21.12
2 A0928 717 -2.79 -10.92 -2.09 5.34
2 B5137 746 -2.79 -10.92 -2.81 5.34
2 C6783 516 -2.79 -10.92 4.40 5.34
3 A1214 12399 -0.89 -4.38 -1.55 2.59
3 B5738 13003 -0.89 -4.38 -1.43 2.59
3 C8365 9074 -0.89 -4.38 6.30 2.59
   
Study 2, 2002 (Nov - Dec)  
1 A3029 361 -0.68 -12.20 -1.25 10.85
1 B4033 372 -0.68 -12.20 -3.10 10.85
1 C8172 398 -0.68 -12.20 -2.64 10.85
2 A0907 579 -0.92 -13.18 -3.45 11.35
2 B5838 593 -0.92 -13.18 -2.36 11.35
2 C8367 633 -0.92 -13.18 0.87 11.35
3 A1813 8108 0.09 -5.67 -2.40 5.85
3 B3147 8323 0.09 -5.67 -0.08 5.85
3 C7989 9223 0.09 -5.67 -0.66 5.85
   
Study 1, 2003 (Jun - Aug)  
1 A3812 289 -3.28 -10.76 -2.12 4.19
1 B2520 309 -3.28 -10.76 -0.62 4.19
1 C3215 325 -3.28 -10.76 -2.66 4.19
2 A4929 1011 -2.46 -6.83 -3.18 1.90
2 B3714 1102 -2.46 -6.83 -1.81 1.90
2 C5505 1157 -2.46 -6.83 -3.79 1.90
3 A5939 8103 -0.73 -3.58 -3.11 2.12
3 B5540 9027 -0.73 -3.58 -1.56 2.12
3 C6059 9258 -0.73 -3.58 -1.07 2.12
   
Study 2, 2003 (Dec - Feb)  
1 A4627 139 -3.00 -17.79 2.69 11.80
1 B4829 140 -3.00 -17.79 0.71 11.80
1 C6008 150 -3.00 -17.79 1.33 11.80
2 A5127 1028 -1.50 -4.79 -0.55 1.79
2 B2629 1028 -1.50 -4.79 -1.39 1.79
2 C3137 1121 -1.50 -4.79 -1.52 1.79
3 A5851 10268 -0.57 -3.27 -2.17 2.13
3 B1219 10269 -0.57 -3.27 -9.65 2.13
3 C0349 11202 -0.57 -3.27 -5.21 2.13
   
Study 1, 2004 (Jun - Jul)  
1 A4329 249 -4.33 -14.73 -5.79 6.07
1 B4160 249 -4.33 -14.73 -5.90 6.07
1 C3352 248 -4.33 -14.73 -5.64 6.07
2 A1812 2403 -1.44 -6.38 -2.25 3.51
2 B0734 2401 -1.44 -6.38 -2.06 3.51
2 C2325 2401 -1.44 -6.38 -1.80 3.51
3 A3401 5777 -0.72 -3.94 -4.21 2.49
3 B1224 5777 -0.72 -3.94 -3.61 2.49
3 C4234 5778 -0.72 -3.94 -5.09 2.49
   
Study 2, 2004 (Nov - Dec)  
1 A2338 166 -4.85 -21.37 -3.48 11.66
1 B2841 165 -4.85 -21.37 -3.83 11.66
1 C5005 181 -4.85 -21.37 -4.92 11.66
2 A1159 1836 -2.08 -8.96 -6.44 4.80
2 B2636 1836 -2.08 -8.96 -2.48 4.80
2 C2302 1835 -2.08 -8.96 -1.60 4.80
3 A2229 8801 -0.91 -4.25 -7.46 2.43
3 B6966 8801 -0.91 -4.25 -6.81 2.43
3 C5551 6602 -0.91 -4.25 -7.57 2.43
   
Study 1, 2005 (May - Jul)  
1 A2166 400 -2.84 -10.41 -1.86 4.73
1 B6053 401 -2.84 -10.41 -0.96 4.73
1 C6316 482 -2.84 -10.41 -3.14 4.73
2 A4270 1203 -3.44 -12.11 -1.93 5.22
2 B5017 1203 -3.44 -12.11 -1.22 5.22
2 C5204 1604 -3.44 -12.11 -1.18 5.22
3 A0243 9002 -1.89 -6.68 -6.31 2.90
3 B2032 9003 -1.89 -6.68 -5.28 2.90
3 C0934 9002 -1.89 -6.68 -6.65 2.90
   
Study 2, 2005 (Nov - Dec)  
1 A6453 134 -4.94 -23.19 -11.60 13.31
1 B4762 134 -4.94 -23.19 -15.52 13.31
1 C2138 134 -4.94 -23.19 -6.64 13.31
2 A1903 3300 -1.39 -4.23 -2.34 1.46
2 B4066 3301 -1.39 -4.23 -2.52 1.46
2 C4460 3301 -1.39 -4.23 -2.96 1.46
3 A7721 9689 -2.05 -7.14 -5.12 3.04
3 B3744 9690 -2.05 -7.14 -5.30 3.04
3 C2213 9690 -2.05 -7.14 -5.43 3.04
   
Study 1, 2006 (May - Jun)  
1 A2256 187 -3.20 -11.20 -5.25 4.70
1 B6621 187 -3.20 -11.20 -4.21 4.70
1 C6122 187 -3.20 -11.20 -2.73 4.70
2 A0328 2400 -1.10 -5.20 -1.31 3.00
2 B3335 2400 -1.10 -5.20 -4.48 3.00
2 C7606 2400 -1.10 -5.20 -1.93 3.00
3 A6058 9800 -1.80 -6.90 -5.64 3.30
3 B7548 9800 -1.80 -6.90 -5.68 3.30
3 C3980 9800 -1.80 -6.90 -2.61 3.30
   
Study 2, 2006 (Oct - Nov)  
1 A5031 161 -3.20 -16.20 -2.90 9.90
1 B3172 161 -3.20 -16.20 -2.48 9.90
1 C6213 161 -3.20 -16.20 -5.72 9.90
2 A4565 1545 -1.30 -6.00 -1.36 3.50
2 B3215 1545 -1.30 -6.00 -1.55 3.50
2 C4666 1545 -1.30 -6.00 -1.99 3.50
3 A6726 10333 -0.50 -3.60 -1.47 2.70
3 B6155 10333 -0.50 -3.60 -1.10 2.70
3 C4724 10333 -0.50 -3.60 -0.75 2.70
   
Study 1, 2007 (Apr - May)  
   
1 A1030 200 -5.20 -21.46 -5.87 11.09
1 B7250 200 -5.20 -21.46 -5.16 11.09
1 C5007 200 -5.20 -21.46 -4.15 11.09
2 A0421 3983 -1.49 -4.57 -1.26 1.60
2 B1270 3983 -1.49 -4.57 -1.59 1.60
2 C6176 3983 -1.49 -4.57 -14.92 1.60
3 A5033 10075 -1.35 -4.69 -2.29 2.00
3 B3578 10075 -1.35 -4.69 -2.89 2.00
3 C0975 10075 -1.35 -4.69 -3.34 2.00
   
Study 2, 2007 (Nov - Dec)  
   
1 A5153 138 -6.19 -22.16 -6.86 9.77
1 B5917 138 -6.19 -22.16 -17.69 9.77
1 C2037 138 -6.19 -22.16 -7.38 9.77
2 A3911 1249 -2.17 -7.93 -8.10 3.59
2 B0716 1249 -2.17 -7.93 2.75 3.59
2 C6266 1249 -2.17 -7.93 -4.26 3.59
3 A5243 10362 -1.20 -4.47 -3.19 2.08
3 B6076 10362 -1.20 -4.47 -1.75 2.08
3 C1956 10362 -1.20 -4.47 -1.00 2.08
   
Study 1, 2008 (May - Jun)  
   
1 A1169 116 -6.86 -20.14 -18.38 6.42
1 B3167 116 -6.86 -20.14 -12.52 6.42
1 C3042 116 -6.86 -20.14 -10.57 6.42
2 A1615 1022 -2.07 -7.31 -4.18 3.18
2 B6733 1022 -2.07 -7.31 -3.22 3.18
2 C3158 1022 -2.07 -7.31 -2.50 3.18
3 A0809 10862 -1.21 -3.72 -2.23 1.31
3 B3265 10862 -1.21 -3.72 -1.94 1.31
3 C5855 10862 -1.21 -3.72 -1.01 1.31
NM Sand Separation NM Fine Separation NM Sediment Mass Results