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19.1t Secondary container azar, double -walled tanks (includes interceptio <br />and detection systerz). tion 2633 (03 <br />A. Backfill in secondary container, (Section 2635 (c) 1-83 <br />B. Pore sx.-e of granular material used as backfill for primary container(s) complies %ith Section 2631 <br />(g). Mbineering data to support capacity requirement). <br />C. Two or more primary containers within secondary container. (include information on product <br />corutibility) <br />D. Secatiary container capable of precluding highest anticipated groundwater. <br />E. Secar ary container sloped to a monitoring sump from which leakage or precipitatian can be detected <br />and re=ved. <br />F. Water ;ir t corner which extends at least a foot beyond each boundary of the secondary container <br />exceva;ien, sloped to drain away from excavation. <br />Secondary container(s) thickness, density, composition, product compatibility. <br />Sized to contain uv: horized releases from primary containers to allow sufficient time for detection and removal. <br />[Section 2631 (c)] <br />21. Secondary container(s) volumetric requirements: (Section 2631 (e) (1) <br />and (2)3 <br />A. Single primary containers = 100%. <br />B. Multiple primary containers = 150% of largest primary container or 10% above aggregate. <br />22. Secondary container(s) open to rainfall. [ Section 2631 (f)3 <br />Volumetric retirements = 24 hours of 100 year storm in addition to primary container volumes. <br />23. N[� <br />X114- <br />24. <br />Secondary container floor. [Section 2631 (i)3 <br />A. Constructed on firm base. <br />B. Sloped to collection sump ( 1/8 inch per foot). <br />® Cl) One or more access casings installed in sump. <br />(a) Size to allow removal of collected liquid. <br />(b) Extended to ground surface. <br />CO Covered with a locked waterproof cap or <br />within a secured facility. <br />® (d) Thickness allows for anticipated stresses. <br />(e) Construction materials are not weakened stored product or will not donate, <br />capture, or mask constituents to be monitored. <br />Membrane liner specifications. (Section 2631; k, 1, and m3 <br />6 <br />