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OPTION lA <br /> ARTICLE 3; SECTION 2631 <br /> ._ MOTOR VEHICLE OR NONMOTOR VEHICLE FUEL TANK _ N - <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 roduct compatibility. <br /> B. Sized to contain unauthorized releas s for sufficient time to allow <br /> detection and removal . <br /> 4. Secondary container volumetric requir ments <br /> A, Single primary container = 100%. <br /> B. Multiple primary containers = 1 0% of largest primary container or <br /> 10% above -aggregate. <br /> I . Document interproduct co atibility <br /> 5. Secondary containers open to r nfall . <br /> A. Volumetric requirement = hours of 25 year storm in addition to <br /> primary container volumes. <br /> 6. Pore space of granular mate ial used as backfill for the primary containers. <br /> A. Refer to Section 2631 ( ). <br /> 7. Secondard 'container equi ped with a collection system. <br /> A. Designed to: <br /> 1 . Accumulate <br /> 2. Temporarily st re <br /> 3. Permit remov of: <br /> a. Precipit tion <br /> b. Subsurf ce infiltration <br /> c. Releas d hazardous substances from primary container(s). <br /> 8. Floor of Seconda y container <br /> A. Constructed n firm base <br /> B. Sloped to flection sump (1/8" per foot) . <br /> 1 . One o more access casings installed in sump <br /> a. zed to allow removal of collected liquid <br /> b. xtend to ground surface <br /> c. Perforated in sump region. <br /> d. Covered with 'a locked waterproof cap or within a secured facility <br /> Thick enough to withstand anticipated stresses <br /> Construction materials: <br /> 1 ) Are not weakened by stored product <br /> 2) Will not donate, capture, or mask constituents to be analyzed. <br /> 9. Me brane liner specifications: <br /> A. Refer .and comply with Article 3, Section 2631 k,' 1 , and m. <br />