BQS OBSP Determination:
TETRACHLOROETHYLENE
METHOD: 1433 , TESTIDCODE: 34476GCM37
Open Data Set

The SGPlot Procedure

Plotted Points Statistics
TETRACHLOROETHYLENE

Spike Level N Mean Std-Dev. Median F_Pseudo
< Reporting Level 4 21% 8% 18% 7%
>= Reporting Level 23 26% 13% 28% 12%
Total 27 25% 12% 25% 12%

Sample Statistics
TETRACHLOROETHYLENE

Characteristic N % % Basis
Plotted 27 90% Spiked
Estimated Values 27 90% Spiked
Deleted Values 0 0% Spiked + Not Spiked
Spiked, Censored 2 7% Spiked
Spiked 30 .  
False Negatives 1 3% 1 out of 30
Not Spiked 22 .  
False Positives 0 0% 0 out of 22