A professional who inspects consignments of crude or refined petroleum to certify that consignments conform to contract specifications. Respnsibilities include:

• Lowers container into tank and withdraws samples from top, middle, and bottom of tank.
• Pours samples into bottles and routes samples to laboratory for analysis.
• Examines petroleum during transfer into receiving tank for discoloration or water.
• Sounds shore tank with steel tape and consults calibration tables to determine quantity of consignment.
• Writes report of findings.
• May conduct laboratory analyses.
• May calibrate tanks, meters, and tank cars.