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
HEIDELBERG COLLEGE (OH) LABORATORY - contract for USGS
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 A2509 255 -3.60 -13.21 -3.37 6.01
1 B2631 277 -3.60 -13.21 -6.17 6.01
1 C2765 182 -3.60 -13.21 -4.15 6.01
2 A2509 508 -3.38 -14.40 -4.28 7.64
2 B2631 532 -3.38 -14.40 -3.50 7.64
2 C2765 359 -3.38 -14.40 -3.79 7.64
3 A1709 10758 -0.36 -8.85 -0.71 8.13
3 B1831 11406 -0.36 -8.85 0.40 8.13
3 C6565 7557 -0.36 -8.85 -0.76 8.13
   
Study 2, 1997 (Nov - Dec)  
1 A3513 263 -2.91 -10.81 -5.25 4.99
1 B3641 273 -2.91 -10.81 -0.07 4.99
1 C3769 185 -2.91 -10.81 -0.76 4.99
2 A3513 498 -3.77 -13.12 -3.38 5.59
2 B3641 538 -3.77 -13.12 -7.14 5.59
2 C3769 362 -3.77 -13.12 -4.84 5.59
3 A3513 10761 -0.72 -3.81 -1.49 2.38
3 B3641 11409 -0.72 -3.81 -1.27 2.38
3 C3769 6560 -0.72 -3.81 -1.55 2.38
   
Study 1, 1998 (May - Jun)  
1 A7426 184 -4.86 -16.80 -5.69 7.09
1 B7547 172 -4.86 -16.80 -5.83 7.09
1 C7682 248 -4.86 -16.80 -2.29 7.09
2 A5519 358 -5.48 -17.52 -7.05 6.55
2 B5454 329 -5.48 -17.52 -12.70 6.55
2 C5375 477 -5.48 -17.52 -0.89 6.55
3 A5426 7695 -1.27 -16.04 -1.84 13.50
3 B7547 8145 -1.27 -16.04 -1.27 13.50
3 C7682 10100 -1.27 -16.04 -0.89 13.50
   
Study 2, 1998 (Oct - Dec)  
1 A7426 92 -2.06 -17.51 -5.71 13.40
1 B7565 207 -2.06 -17.51 -7.02 13.40
1 C7682 272 -2.06 -17.51 -5.88 13.40
2 A5519 170 -2.38 -11.60 -3.23 6.83
2 B5454 351 -2.38 -11.60 -1.54 6.83
2 C5375 511 -2.38 -11.60 -3.15 6.83
3 A1826 3619 -0.28 -3.08 -2.42 2.52
3 B7547 7620 -0.28 -3.08 5.09 2.52
3 C7682 9103 -0.28 -3.08 -1.49 2.52
   
Study 1, 1999 (Apr - May)  
1 A2406 273 -2.19 -13.76 3.22 9.38
1 B2337 300 -2.19 -13.76 -6.78 9.38
1 C5180 148 -2.19 -13.76 -6.62 9.38
2 A6444 530 -2.97 -9.67 -3.39 3.72
2 B6373 570 -2.97 -9.67 -4.48 3.72
2 C1368 298 -2.97 -9.67 -2.01 3.72
3 A3461 10118 -0.43 -4.07 3.36 3.22
3 B3504 10848 -0.43 -4.07 -2.36 3.22
3 C4681 5247 -0.43 -4.07 -0.38 3.22
   
Study 2, 1999 (Sep - Oct)  
1 A3144 344 -2.54 -16.98 -5.47 11.90
1 B3219 345 -2.54 -16.98 -8.33 11.90
1 C3382 274 -2.54 -16.98 -1.60 11.90
2 A3111 784 -1.25 -11.52 0.98 9.02
2 B3271 882 -1.25 -11.52 -1.00 9.02
2 C3342 652 -1.25 -11.52 -2.70 9.02
3 A3305 13968 -0.71 -4.22 -2.06 2.79
3 B3441 14608 -0.71 -4.22 -44.94 2.79
3 C3565 12391 -0.71 -4.22 -1.18 2.79
   
Study 1, 2000 (May - Jun)  
1 A1010 441 -2.87 -11.78 0.43 6.03
1 B4040 461 -2.87 -11.78 -4.80 6.03
1 C7070 386 -2.87 -11.78 -3.80 6.03
2 A1010 1126 -1.63 -8.81 -47.89 5.56
2 B4040 1170 -1.63 -8.81 -3.70 5.56
2 C7070 977 -1.63 -8.81 -2.76 5.56
3 A1616 12651 -0.05 -3.89 0.82 3.80
3 B4040 13194 -0.05 -3.89 -0.56 3.80
3 C7070 11006 -0.05 -3.89 -0.17 3.80
   
Study 2, 2000 (Oct - Nov)  
1 A1313 563 10.49 -105.07 -19.40 126.05
1 B4040 595 10.49 -105.07 38.67 126.05
1 C7070 415 10.49 -105.07 6.47 126.05
2 A1010 1265 2.06 -45.61 37.05 49.72
2 B4040 1289 2.06 -45.61 -4.79 49.72
2 C7070 857 2.06 -45.61 2.72 49.72
3 A1010 13885 -0.92 -5.78 -1.29 3.93
3 B4040 14623 -0.92 -5.78 -1.41 3.93
3 C7070 10430 -0.92 -5.78 -3.73 3.93
   
Study 1, 2001 (Jul - Sep)  
1 A1414 591 -2.17 -10.36 -13.87 6.02
1 B4444 595 -2.17 -10.36 -2.10 6.02
1 C7474 419 -2.17 -10.36 2.73 6.02
2 A1721 1728 -1.73 -5.96 -1.94 2.49
2 B4437 1756 -1.73 -5.96 -0.56 2.49
2 C7788 1252 -1.73 -5.96 -0.50 2.49
3 A2214 13565 -0.34 -3.89 -1.99 3.22
3 B3634 14047 -0.34 -3.89 -1.77 3.22
3 C7179 10004 -0.34 -3.89 -0.83 3.22
   
Study 2, 2001 (Oct - Jan)  
1 A2827 445 -1.44 -20.24 -2.39 17.35
1 B5253 457 -1.44 -20.24 -2.81 17.35
1 C6180 342 -1.44 -20.24 0.77 17.35
2 A2402 1399 -2.30 -8.73 -1.25 4.13
2 B5258 1447 -2.30 -8.73 -1.52 4.13
2 C6790 1032 -2.30 -8.73 -3.64 4.13
3 A0813 12324 -0.46 -4.76 -0.80 3.83
3 B4132 12961 -0.46 -4.76 -0.97 3.83
3 C9062 9170 -0.46 -4.76 6.66 3.83
   
Study 1, 2002 (Jul - Sep)  
1 A2510 330 -0.89 -22.90 1.23 21.12
1 B4043 342 -0.89 -22.90 -3.88 21.12
1 C6282 244 -0.89 -22.90 60.09 21.12
2 A3024 720 -2.79 -10.92 -12.74 5.34
2 B6034 745 -2.79 -10.92 -4.97 5.34
2 C7877 520 -2.79 -10.92 -48.96 5.34
3 A2510 12401 -0.89 -4.38 -1.84 2.59
3 B3831 12998 -0.89 -4.38 -1.52 2.59
3 C6470 9066 -0.89 -4.38 -0.33 2.59
   
Study 2, 2002 (Nov - Dec)  
1 A0630 361 -0.68 -12.20 -5.05 10.85
1 B5158 367 -0.68 -12.20 7.72 10.85
1 C7185 399 -0.68 -12.20 -3.84 10.85
2 A0604 577 -0.92 -13.18 -0.43 11.35
2 B4140 593 -0.92 -13.18 -0.88 11.35
2 C6769 636 -0.92 -13.18 -0.69 11.35
3 A2909 8108 0.09 -5.67 0.75 5.85
3 B4036 8323 0.09 -5.67 0.55 5.85
3 C6969 9221 0.09 -5.67 0.56 5.85
   
Study 1, 2003 (Jun - Aug)  
1 A2433 288 -3.28 -10.76 -3.33 4.19
1 B0455 311 -3.28 -10.76 -2.33 4.19
1 C4352 325 -3.28 -10.76 -3.74 4.19
2 A1133 1011 -2.46 -6.83 -2.52 1.90
2 B0903 1102 -2.46 -6.83 -1.82 1.90
2 C3152 1157 -2.46 -6.83 -2.08 1.90
3 A4508 8102 -0.73 -3.58 -0.13 2.12
3 B1305 9027 -0.73 -3.58 -0.22 2.12
3 C2560 9258 -0.73 -3.58 -0.98 2.12
   
Study 2, 2003 (Dec - Feb)  
1 A0406 139 -3.00 -17.79 -8.27 11.80
1 B1142 140 -3.00 -17.79 -12.77 11.80
1 C3938 151 -3.00 -17.79 -11.11 11.80
2 A1154 1029 -1.50 -4.79 -1.16 1.79
2 B3746 1029 -1.50 -4.79 -3.11 1.79
2 C1039 1124 -1.50 -4.79 -2.58 1.79
3 A0726 10269 -0.57 -3.27 -1.17 2.13
3 B4803 10268 -0.57 -3.27 -1.32 2.13
3 C3706 11202 -0.57 -3.27 -0.98 2.13
   
Study 1, 2004 (Jun - Jul)  
1 A3903 250 -4.33 -14.73 -11.02 6.07
1 B1425 250 -4.33 -14.73 -11.36 6.07
1 C0731 248 -4.33 -14.73 -8.29 6.07
2 A1007 2404 -1.44 -6.38 -8.77 3.51
2 B2814 2403 -1.44 -6.38 -7.18 3.51
2 C2757 2406 -1.44 -6.38 -5.06 3.51
3 A2119 5778 -0.72 -3.94 -1.32 2.49
3 B5149 5777 -0.72 -3.94 -1.42 2.49
3 C0627 5777 -0.72 -3.94 -1.15 2.49
   
Study 2, 2004 (Nov - Dec)  
1 A1457 165 -4.85 -21.37 -10.34 11.66
1 B2413 166 -4.85 -21.37 -13.83 11.66
1 C1214 180 -4.85 -21.37 -21.63 11.66
2 A0108 1834 -2.08 -8.96 -4.47 4.80
2 B5233 1836 -2.08 -8.96 -5.10 4.80
2 C0642 1834 -2.08 -8.96 -6.85 4.80
3 A6764 8801 -0.91 -4.25 -0.45 2.43
3 B2101 8802 -0.91 -4.25 -0.63 2.43
3 C2849 6601 -0.91 -4.25 -3.78 2.43
   
Study 1, 2005 (May - Jul)  
1 A2420 401 -2.84 -10.41 -6.46 4.73
1 B2934 401 -2.84 -10.41 -15.49 4.73
1 C3664 481 -2.84 -10.41 -21.88 4.73
2 A3936 1202 -3.44 -12.11 -8.17 5.22
2 B0712 1202 -3.44 -12.11 -15.36 5.22
2 C0145 1603 -3.44 -12.11 -3.52 5.22
3 A3633 9002 -1.89 -6.68 -5.45 2.90
3 B1555 9002 -1.89 -6.68 -3.50 2.90
3 C4338 9001 -1.89 -6.68 -3.40 2.90
   
Study 2, 2005 (Nov - Dec)  
1 A5750 134 -4.94 -23.19 -13.81 13.31
1 B3961 134 -4.94 -23.19 -16.76 13.31
1 C5651 134 -4.94 -23.19 -16.76 13.31
2 A3709 3300 -1.39 -4.23 -0.89 1.46
2 B3536 3301 -1.39 -4.23 -0.92 1.46
2 C7044 3301 -1.39 -4.23 -0.93 1.46
3 A6840 9689 -2.05 -7.14 -4.44 3.04
3 B2026 9690 -2.05 -7.14 -2.05 3.04
3 C5904 9690 -2.05 -7.14 -3.49 3.04
   
Study 1, 2006 (May - Jun)  
1 A3844 187 -3.20 -11.20 -7.58 4.70
1 B1211 187 -3.20 -11.20 -8.52 4.70
1 C1561 187 -3.20 -11.20 -7.65 4.70
2 A5633 2400 -1.10 -5.20 -1.40 3.00
2 B5040 2400 -1.10 -5.20 -1.90 3.00
2 C3119 2400 -1.10 -5.20 -1.42 3.00
3 A5712 9800 -1.80 -6.90 -2.49 3.30
3 B3045 9800 -1.80 -6.90 -2.51 3.30
3 C0160 9800 -1.80 -6.90 -2.05 3.30
   
Study 2, 2006 (Oct - Nov)  
1 A7520 161 -3.20 -16.20 -2.63 9.90
1 B5803 161 -3.20 -16.20 -17.67 9.90
1 C7449 161 -3.20 -16.20 -10.29 9.90
2 A3563 1545 -1.30 -6.00 -1.02 3.50
2 B2276 1545 -1.30 -6.00 -2.95 3.50
2 C0921 1545 -1.30 -6.00 -5.16 3.50
3 A3878 10333 -0.50 -3.60 -1.11 2.70
3 B3040 10333 -0.50 -3.60 -0.05 2.70
3 C1450 10333 -0.50 -3.60 -0.86 2.70
   
Study 1, 2007 (Apr - May)  
   
1 A2061 200 -5.20 -21.46 -7.78 11.09
1 B6749 200 -5.20 -21.46 -14.21 11.09
1 C1457 200 -5.20 -21.46 -9.10 11.09
2 A1114 3983 -1.49 -4.57 -2.79 1.60
2 B4045 3983 -1.49 -4.57 -1.36 1.60
2 C2277 3983 -1.49 -4.57 -1.55 1.60
3 A0318 10075 -1.35 -4.69 -1.23 2.00
3 B6920 10075 -1.35 -4.69 -1.67 2.00
3 C1025 10075 -1.35 -4.69 -3.51 2.00
   
Study 2, 2007 (Nov - Dec)  
   
1 A5325 138 -6.19 -22.16 -9.52 9.77
1 B3272 138 -6.19 -22.16 -11.79 9.77
1 C0503 138 -6.19 -22.16 -9.94 9.77
2 A1051 1249 -2.17 -7.93 -3.54 3.59
2 B7103 1249 -2.17 -7.93 -3.07 3.59
2 C3675 1249 -2.17 -7.93 -2.55 3.59
3 A2841 10362 -1.20 -4.47 -2.98 2.08
3 B3674 10362 -1.20 -4.47 -1.89 2.08
3 C4545 10362 -1.20 -4.47 -1.74 2.08
   
Study 1, 2008 (May - Jun)  
   
1 A6962 116 -6.86 -20.14 -8.15 6.42
1 B4658 116 -6.86 -20.14 -6.53 6.42
1 C7317 116 -6.86 -20.14 -8.69 6.42
2 A0351 1022 -2.07 -7.31 -1.88 3.18
2 B7014 1022 -2.07 -7.31 -2.96 3.18
2 C1342 1022 -2.07 -7.31 -1.93 3.18
3 A1608 10862 -1.21 -3.72 -2.37 1.31
3 B6938 10862 -1.21 -3.72 -1.72 1.31
3 C7506 10862 -1.21 -3.72 -1.73 1.31
OH Sediment Mass Results