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ANNULAR SPACE • • ' CONT. • " S, TANKS SUMPS & TANK RISERS <br /> 17.3.5. Use a wire puller to position sensor at the tank 18.3.2. Must be isolated from direct traffic loading <br /> bottom. (see Figure 18-1). <br /> 17.3.6. For ease of installation insert the sensor in the Figure 18-1 <br /> tank cavity before installing the monitoring Manhole Watertight Reinforced Concrete <br /> riser pipe to grade.Use a minimum 4"riser to Sump Lid <br /> grade for removal and replacement of sensor. <br /> 17.3.7. CSI recommends a permanent pull cable be <br /> installed and accessible at grade to facilitate 2"min. <br /> periodic sensor inspections. Rigid Board <br /> (5'x 5'x 3/4') EnclosureTop <br /> 17.3.8. For dry monitored double-wall tanks,annular Optional Round <br /> space does not need to be vented. sump Body <br /> 17.4. Dr v Annular Space Vacuum or Air. Extension <br /> Pressure Monitorina <br /> Polygon or Bound <br /> 17.4.1. Consult monitoring equipment manufacturer Sumpaody <br /> for proper installation. <br /> 17.4.2. Maximum vacuum for continuous monitoring Adhesive Channel <br /> is 5 psig utilizing an approved vacuum Electronic Containment Collar <br /> monitoring system with a vacuum make-up Leak sensor <br /> pump. <br /> 17.4.3. Maximum pressure for continuous air pressure 18.4. Single and Double-Wall Tank Sump Installation <br /> monitoring is 3 psig utilizing an approved Instructions are available.Refer to Supplemental <br /> monitoring system with a make-up pump. Documents(Section 21)for additional <br /> Ensure the system is designed to prevent over information. <br /> pressurization of the annular space as tank <br /> damage may occur. 18.5. Collar Test Instructions <br /> CONTAINMENT18. •TANK SUMPS&TANK RISERS • <br /> DO NOT pressure test sump. If applying vacuum,DO <br /> • NOT apply more than 25 inches water vacuum to sump <br /> enclosure or damage may occur. <br /> In freezing conditions,protect collar and sump from 18.5.1. Fill sump with water at least 4"above highest <br /> water accumulation. Freezing water may cause joint or penetration. <br /> damage. 18.5.2. Record the liquid level. <br /> 18.5.3. Wait a minimum of 1 hour. <br /> ' 18.5.4. Re-measure and record the liquid level.A <br /> FSeocinclairycontainment collar must be continuous) liquid change of more than Ya"(0.125") <br /> y indicates a possible leak(see Figure 18-2). <br /> nitored for potential spills or leaks. <br /> Figure 18-2 <br /> 18.1. CSI single and double-wall containment collars <br /> are factory installed to the tank top to provide <br /> a means of secondarily containing leaks from <br /> pumps and piping. <br /> 18.2. CSI tank sumps are designed to provide a <br /> watertight connection to the tank collar Standing Tank sump <br /> utilizing an adhesive joint. water Test <br /> 18.3. All Tank Collars And Sumps: Collar/Sump Secondary <br /> Containment <br /> 18.3.1. Must be continuously monitored for leaks Collar <br /> using an electronic leak monitoring sensor. <br /> Collar/Tank <br /> Joint <br /> 18.5.5. Visually inspect for leaks in the following <br /> locations: <br /> All penetrations <br /> All fittings <br /> At each sump joint <br /> Where collar connects to tank wall <br /> 24 <br />