Page 48 - GPHS Environmental Public Health Standards (Foundation of Public Health) v1
P. 48

Recreational Water Facilities - Operational mode









                     Recirculation mode                                                                         Flow through mode

                                 Either:                                                                               Only when:

                           • Freshwater                                                                             • Making way

                            • Seawater                                                                 • 20 km (12 miles) from land




                Closed valve
                                                                Open valve                             Closed valve                                 Open valve



                                       Pool                                                                                 Pool



                                                                                                                      Potable Water
                                Potable Water                                                                         Potable Water
                                Potable Water

                                                                                                    Treatment
             Treatment
                                                                                                                                                      Discharge to sea
                                                                  Discharge to sea                        Open valve  Circulation pump
                    Open valve  Circulation pump
                                                                                                                                           Balance Tank
                                                      Balance Tank
                                                     Treatment                                                                            No treatment

                                                                                                                           Sea water
                                     Sea water
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