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C <br />16.5.2. TESTING ACR RISER BODY <br />16.5.2.1. Fill the riser with water to a point 6 inches above the <br />collar/riser seam. <br />16.5.2.2. Mark and record the water level and check it after one <br />hour. If no leaks are found, remove the water and continue the <br />installation process. <br />16.5.3. TESTING ACR -WT RISER TOP <br />16.5.3.1. Water test the riser top after the adhesive/sealant in <br />the groove at the top of the riser has sufficiently set. <br />16.5.3.2. Plug any wall penetrations before starting this test. <br />16.5.3.3. Fill the riser system with water to a point above this <br />outer groove (to the top of the cover lip). <br />16.5.3.4. After one hour, inspect all joints and penetrations for <br />leaks. <br />16.5.3.5. If the system is tight, remove the water. <br />16.5.4. REPAIRING LEAKS <br />16.5.4.1. If a leak is found in riser joints (top or bottom), mark <br />the spot and drain the ACR. <br />16.5.4.2. Dry the leak area both inside and out. <br />16.5.4.3. Prepare the area by sanding around the leak at least 3 <br />inches in each direction. <br />16.5.4.4. Apply adhesive/sealant to the sanded area. <br />16.5.4.5. Retest after material sufficiently sets up. <br />ACAUTION <br />• Do not stand on any portion of the installed cover. This <br />may result in damage that would prevent proper sealing. <br />• Do not hit the top lip when sealing the ACR -INT top or <br />damage may occur. <br />16.6. WATERTIGHT COVER INSTALLATION <br />16.6.1. Inspect the gasket in the groove on the underside of the <br />cover. Brush away any debris and make sure the gasket is <br />clean. <br />16.6.2. Check the top lip of the opening for nicks or cracks, and <br />clean as necessary. <br />16.6.3. Set the cover on the opening and seat it in place. <br />16.6.4. Open the clamping ring and fit it around the cover and <br />top lip of the opening. <br />16.6.5. Slowly close the clamping ring with the lever making <br />sure both the cover edge and top lip are caught in the ring <br />groove. Lock the lever in place. <br />23 <br />n <br />t <br />►• not force• • nng closed, or personal <br />property damage occur.binds,• cover and <br />ring, and by again. <br />Note: The gasket in the watertight cover requires periodic <br />replacement. <br />16.6.6. Check for gouges or cracks on the top lip using proper <br />fiberglass, materials and procedures. If damage is detected, <br />contact the UST coordinator at the Xerxes plant nearest you. <br />16.7. FINAL ACR INSTALLATION <br />16.7.1. The ACR must be isolated from all traffic loads. <br />16.7.2. The contractor must install a concrete form to allow a <br />minimum 3 -inch clearance between the concrete pad/street-box <br />frame and the riser top. <br />16.7.3. Backfill to the top of the ACR system. <br />16.7.4. Backfill around the outside edge of the ACR, making sure <br />that no backfill is on top of the ACR. (See FIGURE 16-6, Area A.) <br />16.7.5. Set a barrier on pea gravel to ensure a minimum 3 -inch <br />clearance between the barrier/concrete slab and riser top. <br />Typical installation uses a plywood or equivalent barrier. (See <br />FIGURE 16-6, Area B.) <br />16.7.6. Set the street box and check for clearance to allow <br />access and space to remove the watertight cover. (See FIGURE <br />16-6, Area C.) <br />16.7.7. Continue with backfill, as required, to subgrade. (See <br />FIGURE 16-6, Area D.) <br />Backfill <br />Street Box Barrier <br />® <br />c B <br />14, 40 <br />3" <br />Top of ACR <br />A <br />System <br />Typical Installation Backfill <br />No Backfill <br />on Top of ACR <br />(watertight cover <br />shown) <br />r� <br />u <br />C7 <br />