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LG 162-2 . 5 - 25290 . 2(d ) 5 -25290 . 2(d ) include , but are not limited to , riser piping and access points on top of the tank , which provide access to the primary containment of the tank and may be in contact with vapors of the stored product. 10 . For USTs installed on or after July 1 , 2003 and prior to July 1 , 2004, is an annual line tightness test on pressurized piping required ? Yes . As for all USTs installed since January 1 , 1984 , the requirement for " underground pressurized piping . . . (to) be tightness tested annually" also applies to USTs installed on or after July 1 , 2003 and prior to July 1 , 2004 . [H &S Code , §25290 . 2(g) ; H &S Code , §25291 (f) .] The annual line tightness testing requirement may be met by satisfying the criteria specified in CCR , Title 23 , Section 2636 (g) ( 1 - 5) , PART II : USTs INSTALLED ON OR AFTER JULY 1 , 2004. In addition to the requirements discussed below (Questions A-D of Part 11 ) , USTs installed on or after July 1 , 2004 are subject to all of the installation and monitoring requirements presented in the responses to Questions 1 -8 of Part I . For USTs installed on or after July 1 , 2004 , references to the "July 1 , 2003" date in Part I should be substituted with "July 1 , 2004 . " The H &S Code citations relevant to USTs installed on or after July 1 , 2003 and July 1 , 2004 are provided in the table below. Note that Questions 9 and 10 of Part I do not apply to USTs installed on or after July 1 , 2004 . H &S Code Citation for USTs H &S Code Citation Installed On or After July 1 , 2003 and for USTs Installed Question Prior to July 1 , 2004 On or After July 1 , 2004 Number Part 1 Part 11 1 H &S Code §25290 . 2 a H &S Code 25290 . 1 (a 2 3 H &S Code §25290 ,2 (c) (3) H &S Code 25290 . 1 (c)(3) 4 H &S Code §25290 .20) H &S Code §25290 . 1 (k 5 H &S Code 25290 . 2 H &S Code 25290 . 1 k 6 H &S Code §25290 .2 (i) _ H &S Code 25290 . 1 7 H &S Code 25290 . 2 H &S Code 25290 . 1 8 H &S Code §25290 . 2 H &S Code §25290 . 1 A. In accordance with H &S Code, Section 25290 . 1 (e) , which components of USTs installed on or after July 1 , 2004 must be continuously monitored using vacuum , pressure , or interstitial liquid level measurement methods ? The interstitial space of the tank and product piping (including fill , vent , and vapor recovery piping) , that are beneath the surface of the ground must be maintained under constant vacuum or pressure . Statute also requires that a breach in the primary or secondary containment be detected before the liquid or vapor of the stored substance is released to the environment. Continuous vacuum , pressure , or interstitial liquid level measurement methods can be used to satisfy these California Environmental Protection Agency Ot Recycled Paper