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OPTIC <br /> ARTICLE 3, SECTION 2631 w <br /> MOTOR VEHICLE OR NONMOTOR VEHICLE FUEL TANK <br /> CONSTRUCTION STANDARDS <br /> 1 . Secondard containment provided. <br /> 2. Primary containers shall be product tight. <br /> 3. Secondary containers <br /> A. Thickness, density, composition, and .product, compatibility. <br /> B. Sized to -contain unauthorized releases for sufficient time to allow <br /> detection and .removal . <br /> 4. Secondary container volumetric requirements <br /> A, Single primary container = 100%. <br /> B. : Multiple primary containers = 150% of largest primary container or <br /> 10% above aggregate. <br /> 1; Document interproduct .compatibility <br /> 5. Secondary containers open to-rainfall . <br /> A. Volumetric requirement = 24 hours 'o f 25 year storm in addition to <br /> primary container volumes. <br /> 6. Pore space of granular material used as backfill for the primary containers.. . <br /> A. Refer to Section 2631 (8) <br /> 7. Secondard container equipped with a collection 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 Icasings 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 /> 11 . 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 /> .�J s <br />