INSTALL 1999 - Laserfiche WebLink

Home Browse Search

Double Wall Tank Monitoring Because of its superior leak detection capability, Fluid Containment recommends the Hydrostatic Tank Monitor. However, the tank owner and/or operator is responsible for selection of monitoring system. B 1. Alternate Tank Monitoring Systems • A variety of leak monitoring systems can be used with Fluid Containment double-wall tanks. • Alternate tank monitoring sensor must be located at the monitoring fitting on top of tank. 4" Monitoring Fitting Fiberglass Reservoir` & 4" Hydrostatic Monitoring Fitting 'Tank Model OWT-Type II Only Restrictions on Monitoring Capabilities (All Fluid Containment Double -Wall Tanks) • For liquid sensors and gasoline vapor sensors: ❑ Cavity between the inner and outer tank may be ei- ther vented to the atmosphere or sealed. Restrictions on Monitoring Capabilities (Type 1I Tanks Only) • For Hydrostatic Tank Monitor: ❑ Tank burial depth must not exceed 7' from tank top to finish grade. ❑ Monitoring cavity between the inner and outer tank must be vented to the atmosphere. If unvented, pressure buildup can cause tank dam- age. ❑ Optional reservoir sensor (supplied by Fluid Con- tainment) senses liquid level in reservoir and auto- matically vents monitoring cavity. • For Vacuum Monitoring: ❑ Maximum vacuum is 5 psi. • For Positive Air Pressure Monitoring: C3 Maximum air pressure is 5 psi. 132. Installation of Liquid or Vapor Sensors • Consult monitoring equipment manufacturer for proper installation. • When liquid or vapor sensors are used, the tank may be sloped at time of installation. • If tank is sloped, place tank so that the lowest elevation is at monitoring end. • Use an electrician's wire puller to position sensor at or near bottom of tank. Most sensors can be installed from Finished grade. Important: For ease of installation insert the sensor in the tank cavity before installing the monitoring riser pipe to grade. Note: Fluid Containment recommends minimum 4" riser to grade for ease of removal or replacement of sensor. Install Liquid or Vapor Sensors Here High End 4' Monitoring Fitting Low End of Tank of Tank Fiberglass Reservoir' &4 " Hydrostatic Monitoring Fitting Optional 2" Slope Maximum t Liquid or Vapor Sensors Tank Model DWT -Type II Ony Tank Diameter Clearance Between Inner and Outer Tanks 41 1 ., 6' 7/8" 8' 7/8" of l-1/2" 133. Installation of Vacuum or Air Pressure Monitoring Systems • Consult monitoring equipment manufacturer for proper installation. 134. Installation of Hydrostatic Tank Monitor • See section C for detailed installation instructions. 13