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LG 162-2 - 3 - 4 . Has the definition of " pipe " changed for USTs installed on or after July 1 , 2003 ? Yes . Vent piping , vapor recovery piping , and fill pipes that are beneath the surface of the ground and installed in conjunction with a UST system on or after July 1 , 2003 are regulated " pipe" and are subject to secondary containment requirements . [ H &S Code , § 25290 . 20 ) . ] 5 . Are the piping exemptions provided in H &S Code , Section 25281 . 5 ( a ) (4) and ( b ) ( 1 ) , and the secondary containment exemptions in Section 2636 ( a ) , Title 23 , CCR applicable to USTs installed on or after July 1 , 2003 ? No . The piping exemptions provided in H & S Code , Section 25281 . 5 ( a ) (4 ) and ( b ) ( 1 ) , are not applicable for UST systems installed on or after July 1 , 2003 . [ H & S Code , § 25290 . 20 ) . ] Additionally , the secondary containment exemptions (for vent and tank riser piping , vapor recovery piping , and safe suction piping ) in Section 2636 ( a) , Title 23 , CCR are not applicable for USTs installed on or after July 1 , 2003 . There are no exemptions from the secondary containment requirement for USTs installed on or after July 1 , 2003 . 6 . What type of post-installation testing is required for USTs installed on or after July 1 , 2003 , and when should the testing be completed ? The UST must be tested after installation , and before it is placed into use , using one of the following three test methods : ( 1 ) enhanced leak detection ( ELD ) , (2 ) an inert gas pressure test certified by a third - party and approved by the State Water Board , or (3 ) a test method deemed equivalent to ELD and approved by the State Water Board in regulation . [ H &S Code , §25290 . 2 ( i ) . ] As of the date of this letter , three tests have been determined to meet the ELD performance criteria and are allowable for post- installation testing : Vendor Test Method Praxair Services , Inc . Enhanced Tracer Tight® iota® VaporTite - V005 and CGRS , Inc . Enhanced Tracer Tight° Leak Detection Technologies , Inc MD Leak The three ELD test methods can be used when there is no fuel in the system . The Enhanced Tracer Tight® test and the MD Leak test may also be conducted with fuel in the UST . To conduct either test with fuel , the owner or operator should first obtain approval from the local agency to have fuel delivered to the UST . Prior to approving a fuel delivery , the local agency may need to verify that all pertinent installation requirements have been met . A UST system should not be put into service until the facility has been issued a valid operating permit by the local agency . California Environmental Protection Agency �.a� Recycled Paper