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Monitoring •i • Double—Walled Pressurized <br />Piping • Under—Dispenser C• <br />Title 23, California Code of Regulations (CCR) <br />Continuous monitoring for <br />the UDC that: <br />■ Shuts down the pump <br />OR <br />■ Stops the flow of <br />product at the <br />dispenser when a leak <br />is detected in the UDC. <br />§ 2636(f)(5)(A) <br />Continuous monitoring for <br />the pressurized piping <br />located outside the UDC that <br />is fail safe and shuts down the <br />pump when a leak is detected. <br />§ 2636(f)(5)(B) <br />A line leak detector that <br />detects a 3.0 gallons per hour <br />(gph) release from the <br />primary containment. <br />(A mechanical or electronic <br />line leak detector may be used <br />to fulfill this requirement.) <br />§ 2636(f)(2) <br />Continuous monitoring for <br />both the pressurized piping <br />and UDC that: <br />■ Activates an audible and <br />visual alarm <br />OR <br />• Stops the flow of product <br />at the dispenser when a <br />leak is detected. <br />§ 2636(f)(i ) <br />A line leak detector that detects <br />a 3.0 gallons per hour (gph) <br />release from the primary <br />containment. (A mechanical or <br />electronic line leak detector <br />may be used to fulfill this <br />requirement.) <br />§ 2636(f)(2) <br />An annual piping test that <br />detects a release of 0.1 gph <br />from the primary containment. <br />(This can be performed by an <br />electronic line leak detector that <br />is third -party certified to <br />perform a 0.1 gph test or by a <br />California Licensed Tank <br />Tester.) <br />§ 2636(f)(4) <br />Continuous monitoring for <br />both the pressurized piping <br />and UDC that: <br />OR <br />■ Stops the flow of product <br />at the dispenser when a <br />leak is detected. <br />§ 2636(f)(1) <br />§ 2636(f)(6) <br />§ 2636(f)(4) <br />0 <br />go <br />rN <br />Title 23, CCR, section 2630(d) requires the installation of monitoring equipment such that it is capable of detecting a leak at the earliest <br />possible opportunity. Therefore, an underground storage tank system where the UDC drains back to a low point in the product piping <br />(generally the turbine pump) is not compliant unless a monitoring device is also installed in the UDC. This flow chart was created as a <br />quick reference. Please refer to Title 23, CCR for specific regulatory language regarding other pressurized piping, suction piping, and <br />UDC monitoring requirements. A copy of Title 23, CCR is available online at: www.swrcb.ca.gov. <br />