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<br /> l. All primary containment shall be product-tight and shall have <br /> overfill protection capacity. <br /> 2. Secondary containment shall comply with the following <br /> requirements: <br /> a. All secondary containment shall be constructed of materials <br /> of s-=tficient thickness, density, and composition so as not to be structurally <br /> " <br /> , <br /> weakened as a result of contact with the discharged hazardous materials and so <br /> as to be capable of containing hazardous materials discharged from a primary <br /> container for a period of time equal to or longer than the maximum <br /> anticipated time sufficient to allow recovery of the discharged hazardous <br /> material. <br /> b. In the event that the storage facility has only one primary <br /> container, the secondary containment shall have the capacity to contain at <br /> least 110 % of the volume of the primary container. <br /> c. In the even t that the storage,facility has more than one <br /> primary container, the secondary container shall have the capacity to contain <br /> 150% of the volume of the largest primary container placed in it, or 10 % of <br /> the aggregate internal volume of all primary containers in the storage <br /> facility, whichever is greater. <br /> 3. In the event that the storage facility is constructed of , <br /> lami na ted, coa ted, or clad materials, such construction shall not comDlv with <br /> the requirements of both primary and secondary containment. <br /> (c) Variance <br /> A variance from the requirement for secondary containment and/or <br /> moni tori ng of a new storage facility may be granted bv the City Council upon <br /> recommendation of the. Chief when: <br /> l. The requi rement of secondary containment creates an unusual and <br /> particular hardship; and .. <br /> (17) <br /> ~-" -"...- <br />