3.Measurements relating to water polluting substancesU.K.
3.1.The following measurements shall be carried out at the point of waste water discharge:U.K.
continuous measurements of pH, temperature and flow;
spot sample daily measurements of total suspended solids or measurements of a flow proportional representative sample over a period of 24 hours;
at least monthly measurements of a flow proportional representative sample of the discharge over a period of 24 hours of Hg, Cd, TI, As, Pb, Cr, Cu, Ni and Zn;
at least every 6 months measurements of dioxins and furans; however, one measurement at least every 3 months shall be carried out for the first 12 months of operation.
3.2.Where the waste water from the cleaning of waste gases is treated on site collectively with other on-site sources of waste water, the operator shall take the measurements:U.K.
on the waste water stream from the waste gas cleaning processes prior to its input into the collective waste water treatment plant;
on the other waste water stream or streams prior to its or their input into the collective waste water treatment plant;
at the point of final waste water discharge, after the treatment, from the waste incineration plant or waste co-incineration plant.