Click on a circle in the chart to view Sham immigration records. You can find out when most of the Sham families immigrated to the United States. You can focus your search to immigration records dating from that era. Immigration records can tell you an ancestor's name, ship name, port of departure, port of arrival and destination.
Probably, however...: As my colleague dr. Pappas mentions, marijuana is almost always tested in urine rather than blood, so someone would almost certainly pass a blood test but is more likely to face a urine test.
Approximate times, Cannabis (marijuana) can be detected through testing: Single Use: Blood Test: 2-3 days Saliva Test: 12-24 hours Urine Test: 2-3 days Hair Test: Up to 90 days, depending on how long your hair sample they use has been growing.pproximate times, Cannabis (marijuana) can be detected through testing: Single Use: Blood Test: 2-3 days Saliva Test: 12-24 hours Urine Test: 2-3 days Hair Test: Up to 90 days, depending on how long your hair sample they use has been growing.