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�J <br />LG 162-2 <br />-7- <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 Ai, 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 letter, please contact Ms. Laura Fisher -Chaddock <br />at (916) 341-5570 or Mr. Scott Bacon at (916) 341-5873. <br />Sincerely, <br />Original signed by <br />Kevin Graves, P.E., Manager <br />Underground Storage Tank Program <br />California Environmental Protection Agency <br />V4 Recycled Pager <br />