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- Latest available (Revised) - Welsh
- Original (As made) - English
- Original (As made) - Welsh
This is the original version (as it was originally made).
4.—(1) The base of the silo must be—
(a)designed in accordance with the code of practice for design of concrete structures for retaining aqueous liquids published by the British Standards Institution and numbered BS 8007: 1987(1); or
(b)constructed using appropriate hot-rolled asphalt in accordance with the code of practice for selection and use of construction materials published by the British Standards Institution and numbered BS 5502: Part 21: 1990(2).
(2) The base of the silo, the base and walls of its effluent tank and channels and walls of any pipes must be impermeable.
Publication date: 30 October 1987. ISBN 0-580-16134-X.
Publication date: 31 December 1990. ISBN 0-580-18348-3.
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