Dispenser Calibration

Fueling Devices

Arizona consumers buy nearly 8 million gallons of gasoline each day at approximately 2,000 service stations utilizing some 12,000 individual gas pumps. The Arizona Department of Agriculture, Weights and Measures Services Division is responsible for investigating and auditing all fuel from the refineries, to the pipelines, to the storage terminals, to the tanker delivery trucks, to the gas station and gas pumps.

In Arizona an estimated 8 billion gallons of gasoline are pumped every year. As a business that uses fueling devices there are quite a few things to know.  This page will touch on a few of the requirement including:

  • the sale and dispensing of motor fuel
  • signage and labeling requirements
  • volume testing
  • diesel fuel rebates

Sales, Heating and Dispensing of Motor Fuel

The following requirement are found in the Arizona Revised Statutes, Title 41, Chapter 15. To view click on the highlighted statue number below.

Signage & Labeling

The following signage and labeling requirement are found in Arizona Administrative Code Title 3, Chapter 7. To view the requirement, scroll down to the reference number pertaining to the area of interest.

  • Price and Grade Posting on External Signs - A.A.C R3-7-704
  • Dispenser and Storage Tank Labeling - A.A.C. R3-7-705
  • Oxygenated Fuel Labels - A.A.C. R3-7-709
  • Motor Fuel Storage Tank Labeling - A.A.C. R3-7-713
  • Product Transfer Documentation - A.A.C. R3-7-707 and A.A.C. R3-7-757

Volumetric Test

In accordance with A.A.C. R3-7-703, the Department is responsible for the volumetric inspection of motor fuels and motor fuel dispensers which includes gasoline, diesel and propane. Field officers examine fueling dispensers at each service station in Arizona approximately once every three years, or when there is a complaint.

What is a Volume Test?

A Volume test includes an officer pumping fuel into a certified test measure to check for the accuracy of the amount of product delivered by the dispenser. Officers follow the volumetric testing procedures found in the Handbook 44.

How Does the Public Know a Dispenser is Compliant?

Officers place an approval seal (sticker) on the dispenser, upon completion of the inspection, if the dispenser passes the test and meets all legal requirements. If the dispenser does not pass the test, the dispenser is "red tagged" which, requires repair and recalibration prior to being placed back into service.

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