INSTALL_2004 - Laserfiche WebLink

Home Browse Search

Wednesday, June 02, 2004 11:40 AM Art Gomez 510-494-1596 p.14 Monitoring Systems Effective Hydrostatic Monitoring Monitoring the Tank with Systems for Xerxes Double-Wall Tanks a Reservoir Probe Xerxes double-wall tanks may be monitored with a variety The accurate monitoring of the primary-and secondary-tank of systems. Each monitoring mode—depending on the walls isaccomplished through the use of an electronic sensor economics of the installation—is designed to detect a leak in and the tank-mounted hydrostatic reservoir. either the primary or secondary tank as well as the attached collar riser. Should an installation require maximum round-the-clock monitoring of the tank's interstice, attached collar risers, and/or tank-level conditions, a variety of electronic tank- gauging and leak-detection systems are available from equipment distributors. N0 U !11'r1TMOR V(TH SE�SOF04 ,'ONTROI PANE: e i I With the interstitial space and reservoir factory-filled with monitoring fluid to a predetermined level, a hydrostatic pressure is applied to the inner and outer tank walls. Typical three-tank installation with control panel individually monitoring the If a leak should ever occur in the inner tank, the level of the attached collar riser sumps and intersticial reservoirs. monitoring fluid in the reservoir will drop as monitoring fluid drains into the primary tank. Should a leak develop in the outer wall, the monitoring fluid will drain into the excavation and again lower the level of monitoring fluid. Should a leak occur in the outer wall during high-groundwater conditions, the level of the monitoring fluid will rise as outside water seeps into the interstitial space. In any of these situations, a change in the monitoring-fluid level beyond the acceptable limits will activate the alarm. Monitoring the Attached Collar Riser The optional attached collar riser provides containment for leakage. Should double-wall piping be used, the system can be designed so that a leak in the primary piping will drain to the attached collar riser. To monitor the unwanted presence of liquid inside the riser, an optional electronic sensor can be placed in the attached collar riser.