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  1. Using a contamination survey-monitoring instrument, monitor all equipment where contamination is likely to be present.  On a high pressure injection only the frac line downstream from the injector and the wellhead require monitoring.  The survey should be performed prior to any flushing of the equipment.
  2. If abnormal readings are detected, consult with the frac engineer and the oil company representative on the action to be taken.
  3. Continue monitoring equipment as it is being flushed into rig tank or the vacuum truck.  Dilution with larger quantities of fluids will dramatically reduce contamination levels that were originally present.  The flushing action will remove the contamination from the frac line.
  4. Survey the vacuum truck or the rig tank and confirm if levels are acceptable or not.  Advise concerned personnel of findings and course of action to be taken.
  5. Radioactive contaminated sand must be buried on site if readings are higher than acceptable.  Required soil cover is to be a minimum of 30 cm.  R.A. Tracer employee is to advise customer if this action is required. 
  6. If levels of less than 15,000 cpm are recorded, the regulations state that the sand must be buried on lease.  If levels are recorded in excess of this amount the Canadian Nuclear Safety Commission must be contacted for specific handling procedures.  The above limits are to be assumed when using a Ludlum pancake monitor only.
  7. All radiation levels measured by employees are to be documented on a contamination report and on the ticket.
  8. Frac sand returned to surface should be monitored to ensure levels of contamination are acceptable. Employee should suggest to the customer that this is a precaution that should be taken for safety reasons.