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Sandringham Beach

 Sandringham drains map

 A summary of the results for all beach drains between December 2018 to March 2019 is available on the results page and for Sandringham below the table. Below is a table of drain flows since the start of monitoring, updated monthly.

Drains

Type of monitoring

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Community reports between Dec 2018 - May 2019

Were dry weather  flows detected on regular days/times? 

Number of days drain flowing between Dec 2018 - May 2019  Number of medium - high flow reports between Dec 2018 - May 2019 

Chalmers Avenue drain

Drain at Chalmers Avenue- Sandringham

Citizen science volunteers

 Community reports at drain signs

Sensor

23 5

Low number of small-sized dry weather flows with ammonia detected between Dec 2018-May 2019. Drain blocked by sand in later months of monitoring.

Sims Street drain

Drain at Sims Street- Sandringham

Citizen science volunteers 23 0

 Low number of small-sized dry weather flows with ammonia detected between Dec 2018-May 2019. The small-sized flows were often observed as trickles and not flowing into Bay.

Tennyson Street drain 

Drain at Tennyson Street- Sandringham

Citizen science volunteers 22 0

Low number of small-sized dry weather flows with ammonia detected between Dec 2018-May 2019. The small-sized flows were often observed at trickles and not flowing into Bay.

  

Summary of results - December 2018 to March 2019

Sandringham Beach has had a high level of reporting, with three quarters of these reports submitted by trained citizen science volunteers. Active volunteers at Sandringham have all submitted more than one report, with one volunteer submitting 23 observations! The main findings so far are:

Flows:

  • Sandringham drains flow regularly, with 87 per cent of reports showing drains flowing, although most of the flows reported were small. The focus of this project has been to target medium to large flows, but will switch to following up on small flows as no regular medium or large flows are being detected.
  • Just over half of the flows occurred when there has not been recent rainfall. If more flows not related to rainfall are detected, EPA sampling will occur so we confirm the type and extent of pollution.
  • No medium or large sized flows not related to rainfall were detected.

Ammonia levels:

  • When our trained citizen scientists observe a drain flowing, they perform a simple test for ammonia. Ammonia can be used as a proxy for faecal pollution, as animals excrete ammonia in waste, but it can also indicate other pollution such as detergents or fertilizer. Concentration of ammonia can also vary depending on size of flow and dilution in the drain system.
  • Ammonia results at Sandringham tended to be low, ranging from 0 to 0.5 mg/L. A quarter of dry weather flows had ammonia detected across Sandringham’s three drains. Follow-up sampling will confirm if microbial levels are low at these ammonia concentrations (i.e. do low ammonia levels mean low microbial levels in drain flows).

All this data helps EPA gather a better understanding of stormwater flows affecting Sandringham Beach. Reports will be collected until the end of May 2019 and begin again in late 2019.

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