BQS OBSP Determination:
1,2,3,5-TETRAMETHYLBENZENE
METHOD: 4054 , TESTIDCODE: 50000GCM66
DATES: 08/16/00 - 10/04/03

 Expected Conc. = 4.04 
 Median Pct Recovery = 111%  Expected Conc. = 4.04 
 Median Pct Recovery = 111%  Expected Conc. = 4.04 
 Median Pct Recovery = 111%  Expected Conc. = 4.04 
 Median Pct Recovery = 111%  Expected Conc. = 4.04 
 Median Pct Recovery = 111%  Expected Conc. = 4.04 
 Median Pct Recovery = 111%  Expected Conc. = 4.04 
 Median Pct Recovery = 111%  Expected Conc. = 4.04 
 Median Pct Recovery = 111%  Expected Conc. = 4.04 
 Median Pct Recovery = 111%  Expected Conc. = 4.04 
 Median Pct Recovery = 111%  Expected Conc. = 4.04 
 Median Pct Recovery = 111%  Expected Conc. = 3.948 
 Median Pct Recovery = 111%  Expected Conc. = 3.948 
 Median Pct Recovery = 111%  Expected Conc. = 3.948 
 Median Pct Recovery = 111%  Expected Conc. = 3.948 
 Median Pct Recovery = 111%  Expected Conc. = 3.948 
 Median Pct Recovery = 111%  Expected Conc. = 3.948 
 Median Pct Recovery = 111%  Expected Conc. = 2.4 
 Median Pct Recovery = 111%  Expected Conc. = 2.4 
 Median Pct Recovery = 111%  Expected Conc. = 2.4 
 Median Pct Recovery = 111%  Expected Conc. = 2.4 
 Median Pct Recovery = 111%  Expected Conc. = 1.616 
 Median Pct Recovery = 111%  Expected Conc. = 1.616 
 Median Pct Recovery = 111%  Expected Conc. = 1.616 
 Median Pct Recovery = 111%  Expected Conc. = 1.616 
 Median Pct Recovery = 111%  Expected Conc. = 1.616 
 Median Pct Recovery = 111%  Analysis Date = 07/09/03 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 119%  Analysis Date = 06/07/03 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 141%  Analysis Date = 05/12/03 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 114%  Analysis Date = 08/06/02 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 118%  Analysis Date = 05/09/02 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 84%  Analysis Date = 02/22/02 
 SpikeMix = Absolute 091701: 20 µl 
 Pct Recovery = 95%  Analysis Date = 10/04/03 
 SpikeMix = AccuStandard B2080329: 20 µl 
 Pct Recovery = 88%  Analysis Date = 09/10/03 
 SpikeMix = AccuStandard B2080329: 20 µl 
 Pct Recovery = 113%  Analysis Date = 08/01/03 
 SpikeMix = AccuStandard B2080329: 20 µl 
 Pct Recovery = 118%  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 = 95%  Analysis Date = 06/21/02 
 SpikeMix = Absolute 091701: 8 µl 
 Pct Recovery = 110%  Analysis Date = 03/16/02 
 SpikeMix = Absolute 091701: 8 µl 
 Pct Recovery = 105%  Analysis Date = 01/11/02 
 SpikeMix = Absolute 091701: 8 µl 
 Pct Recovery = 124%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Median Pct Recovery = 111%  Y = 1
The SGPlot Procedure