COMPLIANCE INFO_2003-2005 - Laserfiche WebLink

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Part I: General 1.0 The tank manufacturer shall supply a continuously moni- (01 tored hydrostatic head pressure leak detection system. The system shall be designed by the manufacturer to detect a leak in either the primary tank or the secondary tank in either a wet or dry excavation. The system shall include: a brine solution (to prevent freez- ing) delivered to the job site in the interstice of the double wall tank, a reservoir mounted on top of the tank to provide a liquid medium for monitoring, and an electronic monitor- ing system to sound an audible and visual alarm when the liquid level of the reservoir rises or falls to predetermined alarm points. The system shall also include an electronic sensing probe to monitor the attached collar riser for the submersible pump, if so specified. Part II: Standards 2.0 The double wall tank with a brine -filled interstice shall be list- ed by Underwriters Laboratories. The electronic monitoring system used to monitor the liquid reservoir and the attached collar riser shall also be listed by U.L. for intrinsic safety in a hazardous location. All equipment shall be installed in accordance with the man- ufacturer's instructions and all applicable federal, state, and local laws and regulations. �Nlgllll INHIMIt i i 3.0 The interstice of the double wall tank shall be filled with a brine solution. Tanks up through 20,000 gallons shall be delivered to the site with the brine solution in the interstice. ( Brine filling of interstice on 25,000 and 30,000 gallon tanks NW shall be done at job site by contractor, The reservoir shall be constructed of fiberglass and mounted directly to the top of the tank. The reservoir shall be fitted with one 4" NPT fitting for installation of the electronic -reservoir probe. Part IV: Requirement for the Electronic Monitoring System 4.0 The Controller The panel shall receive the signal from the reservoir and/or attached collar riser and provide for the following indications: 1. System normal 2. System fault (The "fault" indication must not be the same as the "alarm" indication.) 3. System leak alarm Also, a system -test switch indicating the system is functional shall be provided. All alarms shall be both audible and visible. The unit shall be able to be reset. The control panel shall provide indication of which tank is in the alarm condition, if more than one tank is being moni- tored. The control panel shall be capable of monitoring up to eight probe points. The system shall provide intrinsic safety at the probe locations: 4.1 Reservoir Probe The probe shall be constructed of a material which is suitable for prolonged, complete immersion in the monitoring liquid. The monitoring liquid may be: salt brine (309 CaCI in water), The probe shall detect and report a change in liquid level either above (high -alarm point) or below (low -alarm point) the neutral level established during the initial filling and sub- sequent maintenance of the system. The probe shall not operate by inducing an electrical current into the liquid medium that is being monitored. The sensing range represents a built-in allowance for pres- sure and thermal variation. Until the liquid level exceeds the allowable variation, the probe shall not send a signal to the monitor unit. The probe shall be capable of being mounted in the reser- voir in a manner that allows adjustment of location. The probe must be able to be mounted so that normal fluctua- tions of the liquid level do not interfere with the normal operation of the probe. The probe shall be capable of operating at a distance of 500 feet from the control panel. 4.2 Attached Collar Riser Probe (if applicable and shown on the drawing) The probe shall be constructed of a material that is suitable for prolonged, complete immersion in any of the fluids listed in U.L. Standard for Safety 1316, Table 14. 1, all columns. The probe shall detect the presence of liquid in the riser when the liquid level has risen to a maximum of one inch above the bottom of the probe, as located in its permanent mounting position. The permanent mounting position is determined by the installer at the time of installation. The probe shall be capable of being mounted in the riser in a manner that allows adjustment of location. The probe shall be able to be mounted so that an increase in the liquid level does not interfere with the normal operation of the probe. The probe -mounting assembly supplied and installed by contractors shall provide protection for the probe from the operational activities that may take place within the riser. The probe shall be capable of operating at a distance of 500 feet from the control panel. 4.3 Operating Parameters: Temperature: 0° F to 150° F Voltage: 110 or 220 VAC, 50/60 Hz Part V: Performance 5.0 The continuous hydrostatic -monitoring system, including the electronics and the probes, shall be capable of detecting and alarming when the liquid level in the tank reservoir rises or drops beyond the allowable variation. Part VI: Materials 6.0 The materials used in the monitoring system shall be corrosion resistant to the liquid used to fill the interstice. Part Vii: Installation 7.0 The monitoring systems shall be installed in accordance with the manufacturer's installation instructions, and all applicable federal, state, and local laws and regulations. 17