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.
Respondents with less than five years' experience take home $48K on average. In contrast, those who have been around for five to 10 years earn a noticeably higher average of $56K. Corporate Trainers with one to two decades of relevant experience report an average salary of approximately $63K.