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.
As personal trainers gain more experience, they are exposed to a bigger variety of exercises and a wider base of clients. Thus, pay increases with the passing years, according to PayScale. For example, new trainers make $8.78 to $16.48 per hour, while those with one to four years of work get $10.97 to $23.47.