Section 93.503. Product inventory verification at retail facilities.

 

(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 .

(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 ATCP 92 for meter calibration, or an accuracy of 6 cubic inches for every 5 gallons of product withdrawn.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 addressed in s. ATCP 93.570 (4) .

(b) Unauthorized product mixing has occurred, as addressed in ch. ATCP 94 .

CR 07-029 : cr. Register November 2008 No. 635 , eff. 2-1-09; correction in (2) (d) made under s. 13.92 (4) (b) 7. , Stats., Register November 2008 No. 635 ; CR 09-017 : am. (1), (2) (intro.) and (c) Register July 2009 No. 643 , eff. 8-1-09; correction in (1), (3) (a), (b) made under s. 13.92 (4) (b) 7. , Stats., Register December 2011 No. 672 ; corrections in (1), (3) (a), (b) made under s. 13.92 (4) (b) 7. , Stats., Register October 2013 No. 694 .

Note

Inventory verification can be particularly effective during regulatory investigations of consumer complaints about the quality of purchased fuels. Microsoft Windows NT 6.1.7601 Service Pack 1 The inventory verification specified in this section is not required to conform to the inventory control specifications in API 1621. Microsoft Windows NT 6.1.7601 Service Pack 1 Where inventory control is used as the leak detection method, under section ATCP 93.515 (2) , the measurements and procedures followed there will satisfy the requirements for inventory verification in this section. Microsoft Windows NT 6.1.7601 Service Pack 1 Where statistical inventory reconciliation (SIR) is used as the leak detection method, under section ATCP 93.515 (6) , the same data may be used for the SIR and the inventory verification in this section, provided the requirements of the SIR vendor and this section are both met, including the monthly reconciliation in this section. Microsoft Windows NT 6.1.7601 Service Pack 1