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In question 5, your comment about floodplains is incorrect. A 500-year floodplain means there's a 1 in 500 chance (or 0.2%) of the site flooding, not that there's a chance it could flood once every 500 years.
In question 5, your comment about floodplains is incorrect. A 500-year floodplain means there's a 1 in 500 chance (or 0.2%) of the site flooding, not that there's a chance it could flood once every 500 years.