Wisconsin Administrative Code
Department of Agriculture, Trade and Consumer Protection
ATCP 90-139 - Trade and Consumer Protection
Chapter ATCP 93 - Flammable, Combustible, And Hazardous Liquids
Subchapter V - General UST Storage and Underground Piping
Section ATCP 93.503 - Product inventory verification at retail facilities

Universal Citation: WI Admin Code § ATCP 93.503

Current through August 26, 2024

(1) This section applies to any tank system from which products are offered for retail sale to the public that are subject to the requirements of ch. ATCP 94.

Note: Inventory verification can be particularly effective during regulatory investigations of consumer complaints about the quality of purchased fuels.

Note: The inventory verification specified in this section is not required to conform to the inventory control specifications in API 1621.

(2) To verify and maintain the integrity and quantity of delivered products, product inventory verification shall be conducted monthly for the life of the tank system, and reconciled on a monthly basis, in the following manner:

(a) Inventory volume measurements for regulated substance inputs, withdrawals, and the amount still remaining in the tank are recorded each operating day.

(b) The equipment used is capable of measuring the level of product over the full range of the tank's height, to the nearest one-eighth of an inch.

(c) The regulated substance inputs are reconciled with delivery receipts by measurement of the tank inventory volume before and after delivery. Where tanks are interconnected by a manifold, reconciliation may address all of the interconnected tanks as a group rather than as individual tanks.

(d) Product dispensing is metered and recorded in accordance with applicable requirements in ch. ATCP 92 for meter calibration or an accuracy of 6 cubic inches for every 5 gallons of product withdrawn.

(e) The measurement of any water level in the bottom of the tank is made to the nearest one-eighth of an inch at least once a month.

(3) The reconciliation under sub. (2) shall be used to determine whether either of the following are indicated:

(a) A leak detection method has failed as indicated by an overall product loss for two consecutive months as addressed in s. ATCP 93.570(4).

(b) Unauthorized product mixing has occurred, as indicated by an unexplained increase or decrease in product level and as addressed in ch. ATCP 94.

Where inventory control is used as the leak detection method, under s. ATCP 93.515(2), the measurements and procedures followed there will satisfy the requirements for inventory verification in this section.

Where statistical inventory reconciliation is used as the leak detection method, under s. ATCP 93.515(6), the same data may be used for the statistical inventory reconciliation and the inventory verification in this section, provided the requirements of the statistical inventory reconciliation vendor and of this section are both met, including the monthly reconciliation in this section.

Disclaimer: These regulations may not be the most recent version. Wisconsin may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.