â The presence of marijuana is detected by a drug test through the presence of the active chemical THC or Tetrahydrocannabinol. Technically, what is detected is known as THC-COOH (11-nor-delta-9-tetrahydrocannabinol-9-carboxylic acid).
1 Average Riding Instructor Salary: Independent riding instructors typically charge an hourly rate for services but on average earn about $35,000 to $39,000 per year.
O*NET Online reports fitness trainers and aerobics instructors earned a median salary of $33,020 in 2013. The U.S. Bureau of Labor Statistics reports an average annual salary of $37,790 for 2013. Indeed.com reports personal trainers earned an average of $30,000 in 2014.ork Setting Matters. The BLS notes that personal trainersâ salaries vary by work setting and industry. Those who worked in civic and social organizations earned the lowest average annual salary of $33,020 in 2013. Local government provided employment for 10,830 personal trainers, and the average salary was $34,140.