Response to Information Request - REC13/0015

Incidents    );>   Bioretention systems not installed correctly                                             );>   Foreman and       );>   As required

             );>   Sediment builds up on the surface of systems.
                                                                                                                  Project Manager

             );>   The vegetation dies off.

             );>   Pondage of water is in excess of one hour.
             );>   Erosion occurs.

             );>   Pondage of water occurs at every minor rainfall event.
             );>   Weed growth occurs.

             );>   Water quality parameters exceed performance criteria.

             If the results of monitoring indicate performance criteria are not met undertake one or all    Foreman and Project     As required
Corrective
             of the following:                                                                              Manager
Action
             .     Undertake a survey of erosion and        sediment control   measures   and   determine
                   effectiveness of current controls.
             .     Reassess the risks of the works areas and determine if further controls will remedy
                   any problems.