BQS OBSP Determination:
1,2,3-TRIMETHYLBENZENE
METHOD: 4054 , TESTIDCODE: 77221GCM66
DATES: 08/16/00 - 10/04/03

 Expected Conc. = 3.992 
 Median Pct Recovery = 106%  Expected Conc. = 3.992 
 Median Pct Recovery = 106%  Expected Conc. = 3.992 
 Median Pct Recovery = 106%  Expected Conc. = 3.992 
 Median Pct Recovery = 106%  Expected Conc. = 3.992 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 3.4 
 Median Pct Recovery = 106%  Expected Conc. = 1.36 
 Median Pct Recovery = 106%  Expected Conc. = 1.36 
 Median Pct Recovery = 106%  Expected Conc. = 1.36 
 Median Pct Recovery = 106%  Expected Conc. = 1.36 
 Median Pct Recovery = 106%  Expected Conc. = 1.36 
 Median Pct Recovery = 106%  Expected Conc. = 1.36 
 Median Pct Recovery = 106%  Expected Conc. = 1.2 
 Median Pct Recovery = 106%  Expected Conc. = 1.2 
 Median Pct Recovery = 106%  Expected Conc. = 1.2 
 Median Pct Recovery = 106%  Analysis Date = 10/04/03 
 SpikeMix = AccuStandard B2080329: 20 µl 
 Pct Recovery = 90%  Analysis Date = 09/10/03 
 SpikeMix = AccuStandard B2080329: 20 µl 
 Pct Recovery = 100%  Analysis Date = 08/01/03 
 SpikeMix = AccuStandard B2080329: 20 µl 
 Pct Recovery = 97%  Analysis Date = 07/09/03 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 116%  Analysis Date = 06/07/03 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 119%  Analysis Date = 05/12/03 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 102%  Analysis Date = 08/06/02 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 91%  Analysis Date = 05/09/02 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 109%  Analysis Date = 02/22/02 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 100%  Analysis Date = 06/21/02 
 SpikeMix = Absolute 091701: 8 µl 
 Pct Recovery = 107%  Analysis Date = 03/16/02 
 SpikeMix = Absolute 091701: 8 µl 
 Pct Recovery = 107%  Analysis Date = 01/11/02 
 SpikeMix = Absolute 091701: 8 µl 
 Pct Recovery = 119%  Analysis Date = 11/15/00 
 SpikeMix = NSI 053100-01: 25 µl 
 Pct Recovery = 105%  Analysis Date = 08/16/00 
 SpikeMix = NSI 053100-01: 25 µl 
 Pct Recovery = 108%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Median Pct Recovery = 106%  Y = 1
The SGPlot Procedure