Att 3 - Site Based Management · MCU17/0020

5.2 Water quality reaction plan

 Water         quality Low        High       Emergency Plan
 Parameter             setpoint   setpoint
 PH                    7.8        8.2        Manually test and adjust with
                                             Hydrated lime to increase PH or
                                             Hydrochloric Acid to decrease PH
 Ammonia (TAN)         N/A        1ppm       Inspect grow tanks for dead fish
                                             Inspect Bio filter for correct
                                             operation.
                                             Reduce feed rate equal to the date
                                             of last acceptable ammonia test.
                                             Increase feed rate at slower rate to
                                             allow bio filter bacteria to grow. If
                                             ammonia levels increase to high
                                             levels ensure there is enough bio
                                             media in bio filter.
 Nitrite NO2           N/A        1ppm       Check De nitrification tank for
                                             correst dosing of carbon donor and
                                             ORP level correct to ensure there
                                             is no nitrite build up in de
                                             nitrification tank outlet.
                                             Inspect Bio filter for correct
                                             operation.
                                             Reduce feed rate equal to the date
                                             of last acceptable ammonia test.
                                             Increase feed rate at slower rate to
                                             allow bio filter bacteria to grow. If
                                             ammonia levels increase to high
                                             levels ensure there is enough bio
                                             media in bio filter.

 Nitrate NO3           N/A        200ppm     Check denitrification for correct
                                             operation. Check for correct ORP
                                             reading. Ensure at 3% of system
                                             water     is    being    discharged.
                                             Decrease feed rate until solution is
                                             found.
 ORP     (Outlet   of +300mv      +350mv     If below 300mv check ozone
 protein skimmer to                          generator for correct operation
 control       ozone                         including ORP Probe. Check
 output)                                     oxygen generator that produces
                                             oxygen for the ozone generator.
                                             If above 350mv turn ozone
                                             generator off immediately. Check
                                             ORP probe and recalibrate then
                                             turn on ozone generator and
                                             monitor for correct operation.
 ORP (de nitrifying -50mv         +50mv      If below -50mv check dosing pump
 tank    to control                          for correct operation and check
 carbon      donor                           Nitrite levels in system water to
 dosing)                                     ensure nitrite levels are not at high