EngSWMP

                              MATERIALS                          4. WRAP THE FABRIC AROUND OR           REMOVAL
                                                                 OVER THE STORMWATER INLET              1. WHEN THE UP-SLOPE DRAINAGE
                              FABRIC (LIGHT TRAFFIC AREAS):      GRATE IN SUCH A MANNER THAT            AREA HAS BEEN STABILISED,
                              HEAVY-DUTY, NEEDLE-PUNCHED,        PREVENTS ANY WATER ENTERING            REMOVE ALL MATERIALS INCLUDED
                              NON-WOVEN FILTER CLOTH (‘BIDIM’    THE STORMWATER INLET WITHOUT           DEPOSITED SEDIMENT AND DISPOSE
                              A34 OR EQUIVALENT).                PASSING THROUGH THE FABRIC.            OF IN A SUITABLE MANNER THAT WILL
                                                                                                        NOT CAUSE AN EROSION OR
                              FABRIC (HEAVY TRAFFIC AREAS):      5. ENSURE ALL OTHER FLOW ENTRY         POLLUTION HAZARD.
                              POLY-PROPYLENE, POLYAMIDE,         POINTS ARE COVERED WITH FABRIC
                              NYLON, POLYESTER, OR               SUCH THAT WATER CANNOT ENTER                  Sediment collection pit excavated around inlet
                              POLYETHYLENE WOVEN OR              THE STORMWATER INLET WITHOUT
                              NON-WOVEN REINFORCED FABRIC.       PASSING THROUGH A SUITABLE
                              THE FABRIC WIDTH SHOULD BE AT      FILTER.
                              LEAST 700mm, WITH A MINIMUM UNIT
                              WEIGHT OF 140g/m2. FABRICS         6. TAKE ALL NECESSARY MEASURE
                              SHOULD CONTAIN ULTRAVIOLET         TO MINIMISE SAFETY OR FLOODING
                              INHIBITORS AND STABILISERS TO      RISK CAUSED BY OPERATION OF THE
                              PROVIDE A MINIMUM OF 6 MONTHS      SEDIMENT TRAP.
                              OF USEABLE CONSTRUCTION LIFE
                              (ULTRAVIOLET STABILITY EXCEEDING   MAINTENANCE
                              70%).
                                                                 1. INSPECT THE BARRIER AFTER
                              INSTALLATION                       EACH RUNOFF-PRODUCING
                                                                 RAINFALL EVENT AND MAKE REPAIRS            (a) Fabric wrap drop inlet protection with trench
                              1. REFER TO APPROVED PLANS FOR     AS NEEDED TO THE SEDIMENT TRAP.
                              LOCATION AND DIMENSIONAL                                                                                                               Grate wrapped in non-woven
                              DETAILS. IF THERE ARE QUESTIONS    2. REMOVE COLLECTED SEDIMENT                                                                        filter cloth (woven sediment
                              OR PROBLEMS WITH THE LOCATION,     AND DISPOSE OF IN A SUITABLE                            Sediment collection pit                     fence fabric only used in
                              DIMENSIONS OR METHOD OF            MANNER THAT WILL NOT CAUSE AN                           excavated around inlet                      heavy traffic areas)
                              INSTALLATION CONTACT THE           EROSION OR POLLUTION HAZARD.
                              ENGINEER OR RESPONSIBLE
                              ON-SITE OFFICER FOR ASSISTANCE.    3. REPLACE THE FABRIC IF IT IS TORN
                                                                 OR DAMAGED.
                              2. ENSURE THAT THE INSTALLATION
                              OF THE SEDIMENT TRAP WILL NOT      4. SEDIMENT DEPOSITS SHOULD BE                                                        Stormwater
                              CAUSE UNDESIRABLE SAFETY OR        REMOVED IMMEDIATELY IF THEY                                                           inlet grate
                              FLOODING ISSUES.                   REPRESENT A SAFETY RISK.
Catchments & Creeks Pty Ltd




                              3. SELECT THE APPROPRIATE FABRIC
                              FOR THE SITE CONDITIONS.
                                                                                                       (b) Typical details of excavated sediment collection trench
                                                                                                                Drawn:           Date:
                                                                                                                                                   Grated Stormwater (Field) Inlet
                                                                                                                  GMW             May-10 Sediment Trap                                         ESC-02