BQS OBSP Determination:
TETRAHYDROFURAN
METHOD: 4054 , TESTIDCODE: 81607GCM66
Open Data Set

 Analysis Date = 11/15/00 
 SpikeMix = NSI 053100-01: 25 µl 
 Pct Recovery = 110%  Analysis Date = 08/16/00 
 SpikeMix = NSI 053100-01: 25 µl 
 Pct Recovery = 101%  Y = 1.5  Y = 0.5  Y = 1
The SGPlot Procedure

Plotted Points Statistics
TETRAHYDROFURAN

Spike Level N Mean Std-Dev. Median F_Pseudo
>= Reporting Level 2 105% 6% 105% 7%
Total 2 105% 6% 105% 7%

Sample Statistics
TETRAHYDROFURAN

Characteristic N % % Basis
Plotted 2 10% Spiked
Estimated Values 0 0% Spiked
Deleted Values 0 0% Spiked + Not Spiked
Spiked, Censored 18 90% Spiked
Spiked 20 .  
False Negatives 0 0% 0 out of 20
Not Spiked 16 .  
False Positives 0 0% 0 out of 16