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.
Your salary potential in horse racing is as varied as the job opportunities. Data from the U.S. Bureau of Labor Statistics reports that as of May 2014, animal trainers working in spectator sports had an annual mean wage of $35,240 (www.bls.gov).