BQS OBSP Determination:
BENZENE
METHOD: 4054 , TESTIDCODE: 34030GCM66
DATES: 01/11/00 - 08/25/01

 Expected Conc. = 7.112 
 Median Pct Recovery = 103%  Expected Conc. = 7.112 
 Median Pct Recovery = 103%  Expected Conc. = 7.112 
 Median Pct Recovery = 103%  Expected Conc. = 5.172 
 Median Pct Recovery = 103%  Expected Conc. = 5.172 
 Median Pct Recovery = 103%  Expected Conc. = 5.172 
 Median Pct Recovery = 103%  Expected Conc. = 5.172 
 Median Pct Recovery = 103%  Expected Conc. = 5.172 
 Median Pct Recovery = 103%  Expected Conc. = 5.172 
 Median Pct Recovery = 103%  Expected Conc. = 4.05 
 Median Pct Recovery = 103%  Expected Conc. = 4.05 
 Median Pct Recovery = 103%  Expected Conc. = 4.05 
 Median Pct Recovery = 103%  Expected Conc. = 4.05 
 Median Pct Recovery = 103%  Expected Conc. = 4.05 
 Median Pct Recovery = 103%  Expected Conc. = 4.05 
 Median Pct Recovery = 103%  Expected Conc. = 1.4224 
 Median Pct Recovery = 103%  Expected Conc. = 1.4224 
 Median Pct Recovery = 103%  Expected Conc. = 1.4224 
 Median Pct Recovery = 103%  Expected Conc. = 1.4224 
 Median Pct Recovery = 103%  Expected Conc. = 1.4224 
 Median Pct Recovery = 103%  Expected Conc. = 1.4224 
 Median Pct Recovery = 103%  Expected Conc. = 0.81 
 Median Pct Recovery = 103%  Expected Conc. = 0.81 
 Median Pct Recovery = 103%  Expected Conc. = 0.81 
 Median Pct Recovery = 103%  Expected Conc. = 0.81 
 Median Pct Recovery = 103%  Expected Conc. = 0.5 
 Median Pct Recovery = 103%  Expected Conc. = 0.5 
 Median Pct Recovery = 103%  Expected Conc. = 0.5 
 Median Pct Recovery = 103%  Expected Conc. = 0.5 
 Median Pct Recovery = 103%  Expected Conc. = 0.3 
 Median Pct Recovery = 103%  Expected Conc. = 0.3 
 Median Pct Recovery = 103%  Expected Conc. = 0.3 
 Median Pct Recovery = 103%  Expected Conc. = 0.3 
 Median Pct Recovery = 103%  Expected Conc. = 0.3 
 Median Pct Recovery = 103%  Expected Conc. = 0.3 
 Median Pct Recovery = 103%  Expected Conc. = 0.216 
 Median Pct Recovery = 103%  Expected Conc. = 0.216 
 Median Pct Recovery = 103%  Expected Conc. = 0.216 
 Median Pct Recovery = 103%  Expected Conc. = 0.216 
 Median Pct Recovery = 103%  Expected Conc. = 0.216 
 Median Pct Recovery = 103%  Analysis Date = 05/18/00 
 SpikeMix = ERA 093VOC: 40 µl 
 Pct Recovery = 103%  Analysis Date = 01/20/00 
 SpikeMix = ERA 093VOC: 40 µl 
 Pct Recovery = 102%  Analysis Date = 08/25/01 
 SpikeMix = ERA 1128-00-06B: 30 µl 
 Pct Recovery = 102%  Analysis Date = 06/09/01 
 SpikeMix = ERA 1128-00-06B: 30 µl 
 Pct Recovery = 118%  Analysis Date = 03/14/01 
 SpikeMix = ERA 1128-00-06B: 30 µl 
 Pct Recovery = 100%  Analysis Date = 03/23/00 
 SpikeMix = ERA 1210-98-04B: 25 µl 
 Pct Recovery = 99%  Analysis Date = 02/14/00 
 SpikeMix = ERA 1210-98-04B: 25 µl 
 Pct Recovery = 96%  Analysis Date = 01/20/00 
 SpikeMix = ERA 1210-98-04B: 25 µl 
 Pct Recovery = 106%  Analysis Date = 10/18/00 
 SpikeMix = ERA 093VOC: 8 µl 
 Pct Recovery = 106%  Analysis Date = 04/04/00 
 SpikeMix = ERA 093VOC: 8 µl 
 Pct Recovery = 98%  Analysis Date = 01/11/00 
 SpikeMix = ERA 093VOC: 8 µl 
 Pct Recovery = 117%  Analysis Date = 04/27/00 
 SpikeMix = ERA 1210-98-04B: 5 µl 
 Pct Recovery = 105%  Analysis Date = 04/04/00 
 SpikeMix = ERA 1210-98-04B: 5 µl 
 Pct Recovery = 97%  Analysis Date = 11/15/00 
 SpikeMix = NSI 053100-01: 25 µl 
 Pct Recovery = 108%  Analysis Date = 08/16/00 
 SpikeMix = NSI 053100-01: 25 µl 
 Pct Recovery = 94%  Analysis Date = 10/04/00 
 SpikeMix = Restek 57150: 30 µl 
 Pct Recovery = 100%  Analysis Date = 07/25/00 
 SpikeMix = Restek 57150: 30 µl 
 Pct Recovery = 99%  Analysis Date = 03/23/00 
 SpikeMix = Restek 57150: 30 µl 
 Pct Recovery = 105%  Analysis Date = 06/15/00 
 SpikeMix = NSI 121699: 20 µl 
 Pct Recovery = 106%  Analysis Date = 04/27/00 
 SpikeMix = NSI 121699: 20 µl 
 Pct Recovery = 117%  Analysis Date = 02/23/00 
 SpikeMix = NSI 121699: 20 µl 
 Pct Recovery = 108%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Median Pct Recovery = 103%  Y = 1
The SGPlot Procedure