In tank-tightness testing procedures, it is critical to avoid distorted readings that might be caused by temperature changes in product at various depth levels in the tank. To compensate for temperature variances during a tank test, test instruments monitor temperatures. Mathematical formulas, used in conjunction with the temperature measurements and volume of product, enable test operators to properly compensate for temperature changes.
Temperature compensation can also become a consideration during bulk deliveries of gasoline to storage tanks. A significant differential between the gasoline being delivered into a tank and the temperature of the gasoline already in the tank will cause a difference in the temperature of the resulting mixture. This difference can subsequently cause an increase or decrease in the volume of gasoline. For this reason, Hawaii has adopted regulations which require that when petroleum products are transferred, metering devices must be adjusted to reflect temperature conditions.