California ICC UST Inspector Practice Exam

A UST that contains waste oil must comply with overfill prevention unless it receives _____ gallons per transfer.

1. 15

2. 25

3. 10

4. 50

The correct answer is: 25

In the context of underground storage tanks (USTs) that contain waste oil, regulations have specific thresholds for when overfill prevention measures are required. The correct answer is based on the maximum volume of waste oil that can be transferred without triggering the need for overfill prevention compliance. Generally, if a UST receives less than 25 gallons per transfer, it may be exempt from some overfill prevention requirements. This exemption is intended to facilitate the management of smaller quantities of waste oil, recognizing that the risk of overfill is significantly reduced with such limited volumes. This threshold takes into account the practicalities of transferring small amounts of waste, which may not pose the same risk as larger transfers. It’s important to ensure compliance with local laws and regulations, but understanding this exemption helps in planning and operating UST systems effectively.