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OPTPON lA <br /> ARTICLE 3, SECTION 2631 <br /> MOTOR VEHICLE OR NONMOTOR VEHICLE FUEL TANK <br /> CONSTRUCTId STANDARDS <br /> 1. Seco dard containment provided. <br /> 2. Primar containers shall be product tight. <br /> 3. Secondar containers <br /> A. Thickn ss, density, composition, and product compatibility. <br /> B. Sized t contain unauthorized releases for sufficient time to allow <br /> detectio and removal . <br /> 4. Secondary conta er volumetric requirements <br /> A, Single prima container - 100%. <br /> B. Multiple prima containers - 150% of largest primary container or <br /> 10% above aggre te. <br /> 1 . Document int product compatibility <br /> 5. Secondary containers op to rainfall . <br /> A. Volumetric requiremen - 24 hours of 25 year storm in addition to <br /> primary container volu s. <br /> 6. Pore space of granular materia used as backfill for the primary containers. <br /> A. Refer to Section 2631 (8). <br /> 1. Secondard container equipped with a ollection system. <br /> A. Designed to: <br /> 1 . Accumulate <br /> 2. Temporarily store <br /> 3. Permit removal of: <br /> a. Precipitation <br /> b. Subsurface infiltration <br /> c. Released hazardous substances from primary container(s) . <br /> 8. Floor of Secondary container <br /> A. Constructed on firm base <br /> B. Sloped to collection sump (1/8" per foot) . <br /> 1 . One or more access casings installed in sump <br /> a. Sized to allow removal of collected liquid <br /> b. Extend to ground surface <br /> c. Perforated in sump region. <br /> d. Covered with a locked waterproof cap or within a secured facility <br /> e. Thick enough to withstand anticipated stresses <br /> f. Construction materials : <br /> 1 ) Are not weakened- by stored product <br /> 2) Will not donate, capture, or mask constituents to be analyzed. <br /> 9. Membrane liner specifications: <br /> A. Refer and comply with Article 3, Section 2631 j , k, 1 , and m. <br />