2018: Kooringal Sewage Treatment Plant – City of Wagga Wagga

Kooringal Sewerage Treatment Plant

Comprehensive Investigation of Per- and Poly- Fluoroalkyl Substances (PFAS) at RAAF Base Wagga Department of Defence Detailed Site Investigation FINAL (Rev3) 5 June 2018 (Jacobs)

1.WAGGA Council Sewerage Treatment Plants

(a)Extract Page 51 Table 7.2: Results from NSW EPA sampling of treated effluent Council STP (Sewerage Treatment Plants)

Narrung Street STP 1

PFHxA 0.049 ug/l
PFOA 0.07 ug/l

Forest Hill STP 2

6:2 FTS 0.04 ug/l
PFBS 0.02 ug/l
PFHpA 0.01 ug/l
PFHxS 0.016 ug/l
PFHxA 0.055 ug/l
PFOS 0.32 ug/l
PFOA 0.02 ug/l
PFOS+PFHxS 0.48 ug/l

Kooringal STP 3

6:2 FTS 0.021 ug/l
PFHpA 0.03 ug/l
PFHxA 0.030 ug/l
PFOA 0.03 ug/l

Footnotes

1. The Narrung Street STP is located north of the Wagga Wagga CBD Treated effluent is discharged to either the Murrumbidgee River or into the network of effluent reuse/irrigation projects administered by the Council.

2. Forest Hill STP Operated by Council the STP is located approximately 1.2km north of the Base. The STP treats and discharges (as irrigation water) waste water from the Base and surrounding Forest Hill residential area. Biosolids from the plant are spread on land around the STP.

3. Operated by Council the STP is located approximately 6 km west of the Base. Treated effluent from the STP discharges to either the Murrumbidgee River via Marshalls Creek or into the network of effluent reuse/irrigation projects administered by Council. Waste sludge is digested, held in lagoons and then removed to landfill.