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U <br />Containment Sump <br />Access Cover <br />Q�) Top <br />i <br />Sump Body <br />Collar <br />FIGURE 16-1 <br />16.1.4. If conditions may cause groundwater to rise above the <br />containment sump top or may cause surface water to drain into <br />containment sump top, use a watertight containment sump top <br />and cover. (See FIGURE 16-2.) <br />Watertight Containment Sump <br />Locking Ring <br />Access Cover <br />Q� Top <br />Sump Body <br />1 <br />Collar <br />FIGURE 16-2 <br />16.1.4.1. When a watertight system is used, the system must be <br />vented to atmosphere, above the groundwater level. <br />16.1.5. The installing contractor is responsible for sealing the <br />joint between the collar and the sump body (and the top joint <br />when a watertight containment sump is used). <br />16.1.6. Xerxes recommends cutting holes for piping connections <br />prior to application of the sealant. <br />16.1.7. The installing contractor must perform a hydrostatic test <br />after sealing the containment sump. (See SECTION 16.4.) <br />16.1.8. When using sealant materials supplied by Xerxes and/or <br />when doing the fiberglass lay-up in the field, follow the <br />supplemental instructions supplied by Xerxes. <br />22 <br />16.1.9. Typically, an installer will use Bostik 920 to seal the sump <br />body to the collar and/or the sump body to the top. The following <br />instructions are for that sealant material. Follow all instructions <br />on the label of the sealant as well as the following instructions. <br />16.2. PREPARING CONTAINMENT SUMP BODY AND COLLAR <br />16.2.1. The burial depth of the tank determines the length of the <br />containment sump body. (See FIGURE 16-3.) <br />I Per Burial <br />Requirements <br />FIGURE 16-3 <br />16.2.2. The containment sump body can be ordered in 6 -inch <br />increments starting at 36 inches. <br />16.2.3. Dry fit entire containment sump assembly and mark it for <br />proper elevation. <br />16.2.4. Cut the containment sump body to length and prepare <br />for sealing. If the containment sump body needs to be trimmed, <br />use a carbide -tipped blade or masonry saw. <br />WARNING <br />If using any equipment not powered by air to trim the <br />containment sump body, move the containment sump body <br />a safe distance from the tank, piping or any other source of <br />flammable liquids or vapors before beginning the trimming <br />to avoid sparks, fire or explosion. Failure to do so could <br />result in death or serious injury. <br />16.2.5. Abrade the areas to be joined, removing all glossy finish. <br />All abraded areas should be a uniform shade of white, showing <br />glass fibers. <br />16.2.5.1. Abrade the entire circumference of the inside surface of <br />the containment sump body a distance of at least 3 inches up <br />from the point where the containment sump body meets the <br />collar. (See FIGURE 16-4, A.) <br />16.2.5.2. Abrade the entire circumference of the outside surface <br />of the collar lip. (See FIGURE 16-4, B.) <br />16.2.5.3. When using the watertight containment sump, abrade <br />the entire circumference of the outside edge of the containment <br />sump top. (See FIGURE 16-5, A.) <br />16.2.5.4. When using the watertight containment sump, abrade <br />the entire circumference of the inside surface of the channel at <br />the top of the containment sump body. The containment sump <br />top sets into this channel. (See FIGURE 16-5, B.) <br />