Dear all,
I have a question about our developping-HACCP plan.
Our drinking water treatment plant is equipped with the folllow steps:
1) Spring source (by-the-way, is a karst spring, r
1.1) Raw water turbidity measurement (minimum 0.17 fnu, max 30 fnu during 2012)
2) Flocculation step (it works only by a turbidity greater than 0.30 fnu measured at the point #3.1)
3) Rapid sand filtration
3.1) Turbidity measurement
4) Ozonation
4.1) Residual ozone concentration measurement
5) Activated carbon filtration
5.1) Turbidity measurement
6) Chloration (NaClO) for distribution network protection
6.1) Reservoir tanks
7) Residual Chlorine measurement
8) Distribution network
Now, we have identified our CCP as the final chloration step (measured at the point #7).
The question is:
I am analyzing arguments to decide if the turbidity measurement @ the point 5.1 can be a CCP for the effectiveness of the global filtration process / (included the flocculation step) ..... or must be simply a control point?
Our statistical values are showing that during 2012 the maximum value of turbidity leaving our plant was 0.12 fnu, with a mediane value of 0.06 fnu, and never we had problems with biological growth.
Any thoughts on this ?
Your opinion ?
Thank you,
Joe