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.
How much does a Flight Instructor in Ontario, CA make? The median annual Flight Instructor salary in Ontario, CA is $101,631, as of July 29, 2016, with a range usually between $93,435-$114,421 not including bonus and benefit information and other factors that impact base pay.