Valid Value List
< Less Than
<= Less Than or Equal To
= Equal To
> Greater Than
>= Greater Than or Equal To
DN DNQ - Detected, Not Quantified
IN Internal Standard
NA Not Available - Result Not Available
ND Not Detected
NR Not Reported - Data Not Reported
OS Off Scale
PA Present/Absent
RF Response Factor
SU Surrogate
TI Tentatively Identified Compound

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