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0 0 <br /> 16.1.2.When watertight systems are used,that space must be 16.2.2. If conditions may cause groundwater to rise above the <br /> vented to atmosphere,above the groundwater level. ACR top,use an ACR-WT(watertight)riser top and cover. (See <br /> AWARNING FIGURE 16-2.) A1111111116 <br /> • Use air-powered tools to prevent shock, tire or Watertight Attached Collar Riser(ACR-WT) 1P <br /> explosion from flammable liquids and vapors. <br /> • Do not pro ssudze the ACR assembly after insiellagon is Locking Ring <br /> compLeted. Access Cover <br /> • The ACR system is an enclosed space.Hazardous fumes <br /> may be present, so precautions should be taken to <br /> properly vent the space. ACR Watertight Top <br /> Failure to follow this warning could result in death, serious <br /> personal injury or property damage. <br /> ACAUTION Riser <br /> • Each adhesive/sealant step must be allowed to set <br /> sufficiently before attempting any further assembly work <br /> or testing. <br /> • Make sure that no heavy objects are allowed to distort Attached Collar <br /> the riser top after final assembly. This includes the street <br /> box and concrete slab. No weight should be transferred <br /> to the tank. <br /> • Maintain good drainage of water away from the access FIGURE 16-2 <br /> opening of the riser top. <br /> • Choose a street-box size that al kw sufficient clearance <br /> around the outside of the top opening of the riser top. 16.2.3.The joint between the collar and the riser body(also the <br /> • Do not drop the ACR assembly components or allow the top joint when a watertight system is used)shall be sealed by <br /> riser b*to ralthe contractor.Use only that material supplied by Xerxes. <br /> • High winds could damage the ACR components Protect 16.2.4.Do not attempt any repairs to damaged ACR compo- <br /> and secure all pieces should windy conditions arise. vents. If damage is detected,contact the LIST coordinator at the <br /> Failure to follow this caution may result in personal injury or Xerxes plant nearest you. <br /> property damage. <br /> 16.2. PREINSTALLATION 16.3.PREPARING THE COLLAR AND RISER BODY <br /> 16.2.1.Visually inspect all pieces and parts for any shipping 16.3.1.The burial depth of the tank determines the length of the <br /> damage.If any components are missing,contact the UST coor- riser body. (See FIGURE 16-3.) <br /> dinator at the Xerxes plant nearest you.(See FIGURE 16-1 or <br /> FIGURE 16-2.) <br /> Attached Collar Riser(ACR) <br /> Access Cover <br /> Per Burial <br /> Requirements <br /> ACR Top i <br /> Q <br /> Riser <br /> FIGURE 16-3 <br /> Attached Collar 16.3.2.The riser body is available and can be ordered in <br /> 1-foot increments starting at 36 inches. <br /> 16.3.3.Dry-fit the entire ACR assembly and mark it for proper <br /> FIGURE 16-1 elevation. <br /> 21 <br />