Sample code

Place of collection

S1

Main pit

S2

Converging point of pits 1 and 2

S3

Converging point of pits 4 and 5

S4

Bleaching pit

S5

Converging point of pits 2 and 3

S6

VAT (converging point of all coloured wastewater before treatment)

S7

R.O. Reject (after physical and chemical treatment)

S8

Sludge

S9

End of pipeline