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CITY OF ITHACA WATER TREATMENT PLANT (NY) LABORATORY - contract for USGS
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 Target Sediment Median Percent  Lower Control Reported Laboratory  Upper Control
  Id Mass  Difference  Limit  Results Percent  Limit 
    (gm) (%) (%) Difference (%) (%)
Study 1, 1997 (Jul - Aug)  
1 A3412 0.064 -4.40 -14.90 -74.38 6.10
1 B3528 0.063 -4.40 -14.90 -73.38 6.10
1 C3668 0.073 -4.40 -14.90 -83.90 6.10
2 A3412 0.127 -5.10 -16.71 -71.63 6.51
2 B3528 0.125 -5.10 -16.71 -70.43 6.51
2 C3668 0.142 -5.10 -16.71 -83.98 6.51
3 A2613 2.691 -1.84 -14.68 -69.76 11.00
3 B2726 2.691 -1.84 -14.68 -71.35 11.00
3 C6868 3.092 -1.84 -14.68 11.00
   
Study 2, 1997 (Nov - Dec)  
1 A4416 0.066 -4.54 -13.05 -15.02 3.97
1 B4544 0.070 -4.54 -13.05 -18.69 3.97
1 C4672 0.075 -4.54 -13.05 -23.87 3.97
2 A4416 0.126 -4.77 -13.18 -14.24 3.65
2 B4544 0.133 -4.77 -13.18 -5.57 3.65
2 C4672 0.142 -4.77 -13.18 -6.77 3.65
3 A4416 2.691 -1.38 -3.93 -0.33 1.18
3 B4544 2.852 -1.38 -3.93 -4.39 1.18
3 C4672 2.623 -1.38 -3.93 21.06 1.18
   
Study 1, 1998 (May - Jun)  
1 A7125 0.064 -5.15 -12.89 -31.62 2.58
1 B7248 0.068 -5.15 -12.89 -23.89 2.58
1 C7281 0.073 -5.15 -12.89 -35.21 2.58
1 A7125 0.064 -5.15 -12.89 -29.54 2.58
1 B7248 0.068 -5.15 -12.89 -14.93 2.58
1 C7281 0.073 -5.15 -12.89 -27.49 2.58
2 A5820 0.125 -4.82 -13.31 -19.49 3.66
2 B5753 0.131 -4.82 -13.31 -25.34 3.66
2 C5676 0.143 -4.82 -13.31 -19.97 3.66
2 A5820 0.125 -4.82 -13.31 -12.78 3.66
2 B5753 0.131 -4.82 -13.31 -15.70 3.66
2 C5676 0.143 -4.82 -13.31 -14.86 3.66
3 A5325 2.693 -1.70 -6.98 -21.09 3.59
3 B7348 3.253 -1.70 -6.98 -17.25 3.59
3 C7481 3.027 -1.70 -6.98 -12.44 3.59
3 A5325 2.693 -1.70 -6.98 -14.07 3.59
3 B7348 3.253 -1.70 -6.98 -10.29 3.59
3 C7481 3.027 -1.70 -6.98 3.59
   
Study 2, 1998 (Oct - Dec)  
1 A7125 0.071 -3.28 -18.43 -3.25 11.87
1 B7264 0.081 -3.28 -18.43 -1.84 11.87
1 C7381 0.081 -3.28 -18.43 -4.43 11.87
2 A5820 0.131 -3.91 -11.54 -4.34 3.71
2 B5753 0.143 -3.91 -11.54 -2.79 3.71
2 C5676 0.151 -3.91 -11.54 -2.99 3.71
3 A1725 2.711 -1.00 -3.58 -1.80 1.57
3 B7348 3.247 -1.00 -3.58 -0.73 1.57
3 C7481 2.729 -1.00 -3.58 -1.00 1.57
   
Study 1, 1999 (Apr - May)  
1 A2002 0.072 -3.90 -13.19 -4.58 5.39
1 B1933 0.073 -3.90 -13.19 -4.38 5.39
1 C4978 0.073 -3.90 -13.19 -5.78 5.39
2 A5686 0.135 -4.51 -8.94 -5.72 -0.09
2 B6070 0.142 -4.51 -8.94 -3.66 -0.09
2 C1166 0.153 -4.51 -8.94 -5.42 -0.09
3 A3157 2.530 -1.24 -3.28 -1.35 0.80
3 B3096 2.712 -1.24 -3.28 -0.85 0.80
3 C4479 2.625 -1.24 -3.28 -1.55 0.80
   
Study 2, 1999 (Sep - Oct)  
1 A7040 0.070 -3.67 -15.00 1.87 7.66
1 B7120 0.061 -3.67 -15.00 -1.96 7.66
1 C7280 0.068 -3.67 -15.00 1.17 7.66
2 A2808 0.156 -3.25 -12.78 -0.26 6.29
2 B6170 0.172 -3.25 -12.78 1.34 6.29
2 C6239 0.165 -3.25 -12.78 -0.06 6.29
3 A6803 2.769 -0.75 -4.59 -0.54 3.08
3 B3139 2.919 -0.75 -4.59 -0.41 3.08
3 C3278 3.094 -0.75 -4.59 -0.44 3.08
   
Study 1, 2000 (May - Jun)  
1 A0909 0.089 -4.36 -10.87 -1.69 2.16
1 B3939 0.092 -4.36 -10.87 -8.89 2.16
1 C6969 0.097 -4.36 -10.87 -5.45 2.16
2 A0909 0.224 -3.09 -9.45 -1.30 3.26
2 B3939 0.234 -3.09 -9.45 2.14 3.26
2 C6969 0.243 -3.09 -9.45 -2.92 3.26
3 A1313 2.531 -0.76 -2.78 -0.01 1.26
3 B3939 2.639 -0.76 -2.78 -3.11 1.26
3 C6969 2.756 -0.76 -2.78 -0.48 1.26
   
Study 2, 2000 (Oct - Nov)  
1 A1212 0.114 13.84 -110.48 18.65 138.16
1 B3939 0.118 13.84 -110.48 82.44 138.16
1 C6969 0.127 13.84 -110.48 7.74 138.16
2 A0909 0.254 3.70 -47.40 24.75 54.80
2 B3939 0.257 3.70 -47.40 -2.49 54.80
2 C6969 0.276 3.70 -47.40 10.19 54.80
3 A0909 2.877 -1.02 -4.15 -4.08 2.10
3 B3939 2.925 -1.02 -4.15 -0.14 2.10
3 C6969 3.125 -1.02 -4.15 -0.11 2.10
   
Study 1, 2001 (Jul - Sep)  
1 A1313 0.115 -2.82 -10.90 -2.08 5.27
1 B4343 0.119 -2.82 -10.90 -2.01 5.27
1 C7373 0.126 -2.82 -10.90 -5.98 5.27
2 A1819 0.346 -2.08 -5.64 -1.39 1.48
2 B4339 0.351 -2.08 -5.64 -1.48 1.48
2 C7887 0.375 -2.08 -5.64 -2.99 1.48
3 A1916 2.713 -0.54 -3.56 0.15 2.49
3 B3436 2.808 -0.54 -3.56 -0.65 2.49
3 C6874 3.001 -0.54 -3.56 -1.46 2.49
   
Study 2, 2001 (Oct - Jan)  
1 A2728 0.090 -1.43 -24.02 -0.96 21.16
1 B3955 0.090 -1.43 -24.02 -2.40 21.16
1 C8783 0.099 -1.43 -24.02 -2.92 21.16
2 A0718 0.280 -2.67 -9.23 -1.43 3.88
2 B3941 0.288 -2.67 -9.23 -1.45 3.88
2 C8467 0.307 -2.67 -9.23 -2.20 3.88
3 A1803 2.466 -0.63 -3.17 -0.35 1.91
3 B3142 2.600 -0.63 -3.17 -0.13 1.91
3 C8082 2.749 -0.63 -3.17 -0.01 1.91
   
Study 1, 2002 (Jul - Sep)  
1 A1508 0.066 -1.20 -14.06 -1.40 11.65
1 B6046 0.069 -1.20 -14.06 -5.14 11.65
1 C8269 0.074 -1.20 -14.06 8.22 11.65
2 A2909 0.143 -3.15 -11.34 -2.89 5.04
2 B3156 0.150 -3.15 -11.34 -1.79 5.04
2 C7787 0.155 -3.15 -11.34 -5.76 5.04
3 A2111 2.480 -0.62 -2.97 0.40 1.74
3 B4650 2.599 -0.62 -2.97 0.34 1.74
3 C7590 2.720 -0.62 -2.97 -0.08 1.74
   
Study 2, 2002 (Nov - Dec)  
1 A2828 0.072 -2.11 -12.77 17.15 8.55
1 B4460 0.074 -2.11 -12.77 19.08 8.55
1 C8465 0.080 -2.11 -12.77 18.09 8.55
2 A2103 0.116 -2.17 -13.47 14.19 9.13
2 B4234 0.118 -2.17 -13.47 11.77 9.13
2 C8163 0.127 -2.17 -13.47 11.90 9.13
3 A0505 2.433 -0.32 -2.70 0.55 2.07
3 B5840 2.497 -0.32 -2.70 0.02 2.07
3 C6574 2.767 -0.32 -2.70 0.61 2.07
   
Study 1, 2003 (Jun - Aug)  
1 A1528 0.101 -3.85 -10.65 2.95 2.95
1 B5622 0.108 -3.85 -10.65 1.59 2.95
1 C3051 0.114 -3.85 -10.65 2.96 2.95
2 A4112 0.202 -2.95 -7.07 0.55 1.17
2 B3040 0.220 -2.95 -7.07 0.79 1.17
2 C3650 0.231 -2.95 -7.07 1.57 1.17
3 A1654 2.835 -0.81 -2.70 0.06 1.07
3 B5411 3.160 -0.81 -2.70 -0.05 1.07
3 C0545 3.241 -0.81 -2.70 -0.05 1.07
   
Study 2, 2003 (Dec - Feb)  
1 A1836 0.056 -3.87 -18.67 -7.10 10.93
1 B3610 0.055 -3.87 -18.67 -5.25 10.93
1 C1526 0.061 -3.87 -18.67 -7.57 10.93
2 A4509 0.309 -2.12 -5.65 -1.55 1.41
2 B3613 0.309 -2.12 -5.65 -1.81 1.41
2 C4359 0.336 -2.12 -5.65 -1.04 1.41
3 A1316 3.081 -0.57 -2.23 -0.22 1.09
3 B5735 3.081 -0.57 -2.23 -0.13 1.09
3 C4747 3.361 -0.57 -2.23 -0.83 1.09
   
Study 1, 2004 (Jun - Jul)  
1 A1517 0.100 -5.02 -13.98 -3.90 3.93
1 B0621 0.099 -5.02 -13.98 -9.70 3.93
1 C4412 0.099 -5.02 -13.98 -4.97 3.93
2 A2656 0.361 -2.05 -6.89 -2.24 2.79
2 B3715 0.360 -2.05 -6.89 -7.16 2.79
2 C5241 0.360 -2.05 -6.89 -1.30 2.79
3 A3215 2.311 -0.96 -3.68 -2.47 1.75
3 B1648 2.311 -0.96 -3.68 -1.68 1.75
3 C5345 2.310 -0.96 -3.68 -1.65 1.75
   
Study 2, 2004 (Nov - Dec)  
1 A5721 0.067 -5.01 -20.47 -6.82 10.44
1 B4603 0.066 -5.01 -20.47 -5.99 10.44
1 C4129 0.072 -5.01 -20.47 -5.72 10.44
2 A5801 0.275 -2.82 -10.38 -6.79 4.73
2 B4166 0.275 -2.82 -10.38 -2.88 4.73
2 C5449 0.275 -2.82 -10.38 -2.35 4.73
3 A0645 2.641 -1.07 -3.72 -1.92 1.57
3 B5620 2.640 -1.07 -3.72 -1.89 1.57
3 C2048 2.640 -1.07 -3.72 -1.02 1.57
   
Study 1, 2005 (May - Jul)  
1 A2642 0.120 -2.96 -10.38 -3.42 4.46
1 B3170 0.120 -2.96 -10.38 -3.53 4.46
1 C0754 0.120 -2.96 -10.38 -2.93 4.46
2 A0933 0.240 -3.48 -11.39 -5.44 4.43
2 B5729 0.240 -3.48 -11.39 -13.10 4.43
2 C4015 0.241 -3.48 -11.39 -14.81 4.43
3 A5807 3.601 -1.69 -5.99 -1.61 2.62
3 B0718 3.601 -1.69 -5.99 -1.38 2.62
3 C6313 3.601 -1.69 -5.99 -1.04 2.62
   
Study 2, 2005 (Nov - Dec)  
1 A0170 0.060 -5.77 -23.84 -17.40 12.29
1 B5943 0.060 -5.77 -23.84 -5.54 12.29
1 C1813 0.060 -5.77 -23.84 -6.49 12.29
2 A2527 1.485 -1.82 -4.56 -2.00 0.92
2 B4354 1.485 -1.82 -4.56 9.26 0.92
2 C3637 1.485 -1.82 -4.56 -0.93 0.92
3 A7362 4.360 -2.19 -7.07 -1.68 2.68
3 B2909 4.361 -2.19 -7.07 -1.47 2.68
3 C5105 4.361 -2.19 -7.07 -1.61 2.68
   
Study 1, 2006 (May - Jun)  
1 A1723 0.084 -3.90 -11.30 -6.42 3.60
1 B7259 0.084 -3.90 -11.30 -4.55 3.60
1 C7551 0.084 -3.90 -11.30 -6.18 3.60
2 A5505 1.080 -1.50 -5.40 -0.97 2.40
2 B3768 1.080 -1.50 -5.40 -1.41 2.40
2 C6964 1.080 -1.50 -5.40 -1.87 2.40
3 A7124 4.410 -1.70 -5.50 -1.61 2.10
3 B5275 4.410 -1.70 -5.50 -1.16 2.10
3 C6810 4.410 -1.70 -5.50 -1.14 2.10
   
Study 2, 2006 (Oct - Nov)  
1 A3036 0.072 -3.90 -16.40 -4.61 8.50
1 B0705 0.072 -3.90 -16.40 -3.94 8.50
1 C2365 0.072 -3.90 -16.40 -3.73 8.50
2 A0518 0.695 -2.00 -6.40 -1.32 2.40
2 B0205 0.695 -2.00 -6.40 -1.38 2.40
2 C1258 0.695 -2.00 -6.40 -1.41 2.40
3 A0565 4.650 -0.60 -2.90 -0.42 1.70
3 B7079 4.650 -0.60 -2.90 -0.20 1.70
3 C2030 4.650 -0.60 -2.90 -0.20 1.70
   
Study 1, 2007 (Apr - May)  
   
1 A7139 0.090 -5.23 -20.25 -3.87 9.80
1 B5324 0.090 -5.23 -20.25 -7.91 9.80
1 C2901 0.090 -5.23 -20.25 -4.08 9.80
2 A6312 1.780 -1.18 -3.94 -0.33 1.58
2 B5648 1.780 -1.18 -3.94 -0.51 1.58
2 C0843 1.780 -1.18 -3.94 -0.72 1.58
3 A6426 4.500 -0.81 -3.78 -0.38 2.17
3 B0251 4.500 -0.81 -3.78 -0.29 2.17
3 C4607 4.500 -0.81 -3.78 -0.30 2.17
   
Study 2, 2007 (Nov - Dec)  
   
1 A1827 0.062 -6.08 -23.79 -4.75 11.62
1 B6634 0.062 -6.08 -23.79 -6.08 11.62
1 C0771 0.062 -6.08 -23.79 -5.42 11.62
2 A2844 0.562 -1.85 -7.39 -1.76 3.70
2 B2437 0.562 -1.85 -7.39 -1.63 3.70
2 C1819 0.562 -1.85 -7.39 -1.43 3.70
3 A1350 4.663 -0.69 -3.10 -0.16 1.73
3 B2019 4.663 -0.69 -3.10 -0.22 1.73
3 C5605 4.663 -0.69 -3.10 -0.18 1.73
   
Study 1, 2008 (May - Jun)  
   
1 A0307 0.052 -6.73 -20.87 -7.69 7.41
1 B4450 0.052 -6.73 -20.87 -6.91 7.41
1 C0947 0.052 -6.73 -20.87 -6.91 7.41
2 A2150 0.460 -1.94 -7.46 -6.10 3.58
2 B3612 0.460 -1.94 -7.46 -1.74 3.58
2 C3806 0.460 -1.94 -7.46 -2.09 3.58
3 A7242 4.888 -0.64 -2.78 -1.29 1.50
3 B0566 4.888 -0.64 -2.78 -1.37 1.50
3 C0149 4.888 -0.64 -2.78 -1.18 1.50
NY Suspended Sediment Concentration Results