Noosa Springs SMP_Rev 4 · OPW17/0612

ALTUM CONSTRUCTIONS
PRECINCT F & E2 NOOSA SPRINGS DEVELOPMENT



          It is noted that the 90th percentile TSS concentration for Precinct E2 is less than the
          average also because the TSS pollutant load is dominated by high pollutant concentration
          events. The top 10% of high pollutant events are therefore accounted for in the average
          but not accounted for in the 90th percentile value.

          Based on these results the proposed Noosa Springs development satisfies the
          requirements of Condition 49, Part 1a.

4.4.2     Monitoring Protocol

          Condition 49 Part 1b specifies that a monitoring protocol be developed to confirm that any
          nutrients or prescribed water contaminants at risk of runoff from the development site is
          not responsible for adverse water quality matters within the Noosa Springs Lake System.

          To meet this condition it is proposed that event based monitoring be undertaken on
          discharges from the site prior to entering the Noosa Springs Lake System. Monitoring will
          sample the same constituents currently sampled within the Noosa Springs Lake System
          and be triggered by a storm event greater than 40mm.

          Analysis of Noosaville rainfall data for years with complete rainfall data (2010 to 2016)
          shows that a 40mm trigger will allow for collection of a minimum of 5 samples. On
          average this will trigger collection of 10 events per annum. It will also be proposed that if
          by the end of November, 5 rainfall events have not been collected for that year the trigger
          will be reduced to 20mm to ensure that the minimum of 5 rainfall events are likely to be
          collected.

          The monitoring strategy will be as follows:

             Following Parameters will be monitored

                   Nitrite plus Nitrate as N (NOx)
                   Total Kjeldahl Nitrogen (TKN)
                   Total Nitrogen as N (TKN + NOx)
                   Total Nitrogen as N
                   Total Phosphorus as P
                   Reactive Phosphorus as P (Dissolved)
                   Reactive Phosphorus – Filtered
                   Suspended solids

             Monitoring will be undertaken by a suitably qualified person using NATA accredited
              methods

             Water quality monitoring results must be retained in electronic form by the property
              owner for a minimum of 5 years and will be made available to Noosa Council on
              request

             Samples will be collected at the 3 stormwater manholes immediately upstream of the 3
              legal points of discharge between half an hour and 24 hours following commencement
              of a trigger rainfall event.


Job No. M7130_001                                                                              Page 10
                                                                                Rev 4 : 7 December 2017