The percentage of the general workforce who substituted other people’s urine in drug tests surged sixfold to a new high last year as legalized marijuana use grew nationwide, a report has found. Drug testing laboratory Quest Diagnostics reported Wednesday that about 6,000 out of 5.5 million drug tests last year showed evidence of workers swapping urine. That’s up by 633% from … [Read more...] about Reports of workers swapping urine in drug tests surged sixfold last year as marijuana use grew