(1)
Sentence (2) applies to the design and construction of a leaching bed with distribution pipes used within the leaching bed.
(2)
The header line and distribution pipes within a leaching bed shall be designed and constructed so that they can be detected by
(a)
magnetic means,
(b)
means of a 14 gauge TW solid copper light coloured plastic coated tracer wire, or
(c)
other means of subsurface detection.