D.C. Mun. Regs. tit. 20, r. 20-6005

Current through Register Vol. 71, No. 36, September 6, 2024

Rule 20-6005 - INVENTORY CONTROL AND STATISTICAL INVENTORY RECONCILIATION

6005.1

A release detection method that uses product inventory control shall meet the requirements of this section.

6005.2

An owner or operator may use product inventory control as the sole method of release detection only for heating oil tanks.

6005.3

Product inventory control shall be conducted monthly to detect a release of at least the combined amount of one percent (1%) of flow-through plus one hundred thirty (130) gallons 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 shall be recorded each operating day;

(b) The measurement equipment used shall be capable of measuring the level of product over the full range of the tank's height to the nearest one eighth (1/8) of an inch;

(c) The regulated substance inputs shall be reconciled with delivery receipts by measuring the tank inventory volume before and after delivery;

(d) Each delivery shall be made through a drop tube that extends to within six (6) inches of the tank bottom;

(e) Product dispensing shall be metered and recorded using devices that are registered with the Department of Consumer and Regulatory Affairs Office of Weights and Measures and in compliance with the Registration and Inspection of Weighing and Measuring Devices Amendment Act of 2004, effective December 7, 2004 (D.C. Law 15-205; D.C. Official Code §§ 37- 201.01 et seq.), or within an accuracy of six (6) cubic inches for every five (5) gallons of regulated substance withdrawn; and

(f) The water level at the bottom of the tank shall be measured at least once each month to the nearest one eighth (1/8) of an inch.

D.C. Mun. Regs. tit. 20, r. 20-6005

Final Rulemaking published at 40 DCR 7835, 7870 (November 12, 1993); as amended by Final Rulemaking published at 46 DCR 7699 (October 1, 1999); amended by Final Rulemaking published at 67 DCR 1778 (2/21/2020)