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BC § 1805.4
Where it is determined that there is a potential for infiltration or seepage, a subsoil drainage system shall be permitted to be used to control this inflow, provided that: 1. The below ground space is waterproofed or dampproofed per Sections 1805.2 and 1805.3; and 2. The estimated discharge from the drainage system is less than or equal to the amount allowed by the agency having jurisdiction.
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