Can You pass A Saliva test if you haven't smoked in 4 weeks?

Substance Detection Period by Urine Test

Alcohol 12-24 hours
Amphetamine 1-4 days
Barbiturates 1- 21 days
Benzodiazepines 1-42 days
Cannabis (Single Use) 2-3 days
Cannabis (Habitual Use) Up to 12 weeks
Cocaine 4-5 days
Codeine/Morphine 2-4 days
Heroin 2-4 days
Methamphetamines 3-5 days
PCP 3-7 days