12. Existing EA (2016)

Permit

Environmental authority EPPR00439413

 

Table 5: Contaminant Release Limits to Water

 

 

 

 

 

 

 

 

 

 

 

Discharge Discharge aes
: : 7 Minimum
location 1 location 2 Quality utes ste BEN
monitoring | monitoring | characteristics Release limit Limit ype lead
point point 4q y
Si $2 pH 7-8.5 range pre rel
Dissolved se Daily when
Si S2 Oxygen 6 mg/L minimum dredging
Must not exceed 2 NTU above a
background* value where the
background value is less than 20NTU .
Si $2 Turbidity or 10 percent greater than a aan
background value where the ging
background value is greater than
20NTU
Oil. Grease Daily visual
Si $2 Scum and Litter Not visible or otherwise noticeable CE Ta
20th percentile — 6mg/L Daily
Suspended ‘ representative
Si S2 Solids 50th percentile - 10mg/L sample when
80th percentile - 16mg/L dredging

 

 

 

*For the purposes of this condition a “background value” for a quality characteristic is the value of the quality characteristic
measured at a background sampling and in situ monitoring point in the receiving waters not affected by the release situated
between fifty (50) and one hundred (100) metres up- current from the release point and the background must be measured
one (1) hour either side of the local high water and local low water.

S1- within 3m offshore from the location of beach nourishment.

S2-— a down-current sampling point in the receiving waters situated not more than one hundred (100) metres from the
dredge in the down-current direction at times when tidal flows or other flows are occurring and not more than fifty (50)
metres distance from the dredge during slack water conditions.

Page 11 of 24 * GK130701 * EM797 * Version 1

Department of Environment and Heritage Protection