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LG 162-2 - 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 II ) , 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 II 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 . 20 ) 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 Envil4onmental Protection Agency E rZp� Recycled Paper