Section 20-6007. TANK TIGHTNESS TESTING

 

6007.1Tank tightness testing shall be capable of detecting a one-tenth of a gallon per hour (0.1 gal/hr) leak rate from any portion of the tank that regularly contains or conveys a regulated substance and shall account for the effects of the following factors when detecting a leak rate:

 

(a)Thermal expansion or contraction of the regulated substance;

 

(b)Vapor pockets;

 

(c)Tank deformation;

 

(d)Evaporation or condensation; and

 

(e)The location of the water table.

 

6007.2Owners or operators shall conduct a tightness test to satisfy the installation, upgrade and repair requirements as set forth in Chapter 57, 58 and 59 of this Subtitle before the operation of the UST system.

 

6007.3Owners or operators may use tightness testing as the sole method of release detection for heating oil tanks only.

 

6007.4Owners or operators may use tightness testing for confirming a suspected release to satisfy the requirements set forth in § 6203.

 

source

Final Rulemaking published at 40 DCR 7835, 7872 (November 12, 1993); as amended by Final Rulemaking published at 46 DCR 7699 (October 1, 1999).