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File MH19409 Vol. 1 Sec. 1 Page 2 Issued: 1996-05-29 and Report Revised: 2004-04-09 CONSTRUCTION DETAILS: The general configurations and dimensions of the tank sumps are shown in Table 1 and in ILLS. 2, 3 and 4. The sumps are manufactured of a single wall construction at a thickness of 200 mils. They are manufactured in a fabrication process using glass-fiber reinforcing in combination with an ispotahlic polyester resin. In various states of the manufacturing process, the glass fiber reinforcement is applied in the form of filament winding roving, chopped strand-woving *roving or molded. Double Wall Sumps - The inner sump wall is fabricated identically to the single wall models. The interstitial material is applied over the single wall sump and the outer wall is applied over the interstitial material to a minimum thickness of 200 mils (0.20 in.). An interstitial access fitting is installed to allow for testing and/or monitoring in the field. Refer to 1ll. 9 for fabrication process details. COMPONENT ELEMENTS The following lists identifies the materials that are used in the manufacturing process. A. Isoptahlic Polyester Resins 1. Reichhold No_ 33-407, may also be designated as Reichhold No. 98-493. B. Catalyst 1. Methyl Ethyl Ketone Peroxide in dimethyl phthalate - Technical Grade. Identified by product name on container. C. Glass Fiber Chopping Roving 1. Owens Corning Fiberglass, No. 357. D. Interstitial Material - Parabean 3D glass fabric Type 87136. Riser Reducers - The riser reducers come centered, offset and waterproof bolt down type lids which incorporate a UL Recognized gasket evaluated for use with gasoline and gasoline/alcohol blends. The risers are contact molded and are manufactured (of a) Reichhold 33-407 at a thickness of 200 mils. The risers can range from height of rise of 5 to 12 in. , 29-7/8 to 34 in. OD of Opening, and 30-1/2 to 34 in. OD of lid. LMD/WD:1kc NKDLS