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.
While dog trainers can earn as little as $7.76 an hour up to as much as $29.59 an hour, Animal Behavior College estimates the average wage at $20 an hour, as of 2010. However, some trainers earn upward of $150 an hour â especially those with a great deal of experience and in certain areas of the country.