Sentence 4.3.8.3.(3)

Intent 1:

To limit the probability that excessive external loading will lead to tank stress, which could lead to tank damage and failure, which could lead to the escape and spread of liquid, which could lead to harm to the public.

Intent 2:

To override the requirements of Sentences 4.3.8.3.(1) and (2) and permit reduced depth of coverage if adequate alternative protection [concrete slab] is provided.