BQS OBSP Determination:
TETRACHLOROMETHANE
METHOD: 2021 , TESTIDCODE: 32102GCM66
Open Data Set

The SGPlot Procedure

Plotted Points Statistics
TETRACHLOROMETHANE

Spike Level N Mean Std-Dev. Median F_Pseudo
< Reporting Level 3 86% 35% 96% 50%
>= Reporting Level 237 99% 19% 100% 15%
Total 240 99% 19% 100% 15%

Sample Statistics
TETRACHLOROMETHANE

Characteristic N % % Basis
Plotted 240 99% Spiked
Estimated Values 45 19% Spiked
Deleted Values 33 6% Spiked + Not Spiked
Spiked, Censored 0 0% Spiked
Spiked 275 .  
False Negatives 2 1% 2 out of 242
Not Spiked 233 .  
False Positives 1 0% 1 out of 233