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y 19. Secondary container other than to -walled tanks (incl interception <br />and detection system). lSection 2633 Ml <br />A. Backfill in secondary container. t tion 2635 (c) 1.81 <br />B. Pore`space of granular material used as backfill for primary container(s) complies with tion 2631 <br />(g). (Engineering data to support capacity requirement]. <br />C. Two or more primary containers within secondary container. (include information on product <br />compatibility) <br />0. Secondary container capable of precluding highest anticipated groundwater. <br />E. Secondary container sloped to • monitoring sump from which leakage or precipitation can be detected <br />and removed. <br />F. Nater tight comer which extends at least s foot beyond each boundary of the secondary container <br />excavation, sloped to drain away from excavation. <br />20. secondary container(s) thickness, density. Composition, Product compatibility. <br />Sized to contain unauthorized releases from primary containers to allow sufficient time for tection removal. <br />[Section 2631 (c)3 <br />21. Secondary container(s) van tric requir to: (Section 2631 (a) (1) <br />® and (2)) <br />A. Single primary containers a 1 <br />B. Multiple primary containers o 150% of largest primary, tainer or 10% tea <br />22. secondary container(s) Open to,rainfatt. t section 2631 Ml <br />Volumetric requirements a 24 hours of 100 r stoma on to primary container volumes. <br />23. Secondary container floor. tSection 2631 (i)) <br />A. constructed on firm . <br />B. Sl to collection ( 1/ inch per foot). <br />(1) or more ass casings installed in <br />(a) Size to allow removal of collected liquid. <br />(b Ext to gr surface. <br />(c) 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 donste, <br />capture, or mask constituents to be monitored. <br />24. Membrane liner $if.lastions. [section 2631; k, I. and ml <br />M <br />