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LG 162-2 - 7 - <br /> satisfy the monitoring requirement in Section 25290.1(d). These components <br /> include, but are not limited to, riser piping and access points on top of the tank, <br /> which provide access to the primary containment of the tank and may be in <br /> contact with vapors of the stored product. <br /> The requirement for sumps and UDCs to have sensors is as follows. Sumps and <br /> UDCs installed and monitored in accordance with paragraph A.i, above, must <br /> have sensors that are capable of detecting liquid and vapor releases from the <br /> primary containment. No sensors are required for sumps and UDCs installed <br /> and monitored in accordance with paragraph A.ii, above. Sumps and UDCs <br /> installed and monitored in accordance with paragraph A.iii, above, are only <br /> required to have sensors that are capable of detecting liquid releases. <br /> C. For UST components monitored continuously using vacuum, pressure, or <br /> interstitial liquid level measurement methods, is additional testing or <br /> evaluation necessary? <br /> If the component's current listing includes approval for its use with continuous <br /> monitoring using vacuum, pressure, or interstitial liquid level measurement <br /> methods, no further testing or evaluation is necessary. However, if the <br /> component's current listing does not include approval of its use with continuous <br /> monitoring using vacuum, pressure, or interstitial liquid level measurements, <br /> additional testing or evaluation may be necessary. Owners and operators should <br /> ensure that UST components are approved for use with a continuous monitoring <br /> system using pressure, vacuum, or interstitial liquid level measurement methods <br /> consistent with the requirements outlined in Sections 2631 (b) and (d), Title 23, <br /> CCR, as applicable. <br /> D. For USTs installed on or after July 1, 2004, is the annual line tightness test <br /> on pressurized piping required? <br /> No. For USTs installed on or after July 1, 2004, an annual line tightness test on <br /> the primary piping is not required. <br /> If you have questions regarding this document, please contact the UST Program at <br /> (916) 341-5775 or via e-mail at .ustCcD-waterboards.ca.gov. <br /> Sincerely, <br /> Original signed by <br /> Kevin Graves, P.E., Manager <br /> Underground Storage Tank Program <br /> California Environmental Protection Agency <br /> Zak Recycled Paper <br />