Attachment D - Stormwater and Water Quality report

®

Queensland
Government

Environmental
Protection Agency
Queensland Parks

and Wildlife Service

DRAFT SITE MANAGEMENT PLAN (SMP)
Environmental Protection Act 1994 (EP Act), Chapter 7 Part 8 Division 5

DATE: 28 April 2008

RPD Lot 5 on Plan SP173770;
Lot 7 on Plan SP173770
Lot 2 on Plan RP47020;
Lot 1 on Plan RP87371 EPA File: 902326

1.0 SUMMARY OF CONTAMINATION

These allotments, Lot 5 on SP173770, (formerly part of Lot 2 on RP87371) Lot 7 on
SP173770 (formerly part of Lot 1 on RP 885282), Lot 2 on RP47020 and Lot | on
RP87371; were part of the Boral Cooroy timber mill which operated from 1959-2001.
Prior to the establishment of the timber mill at the site, the site was used for transient
farming and residence. No environmental impacts are known to have occurred at the
site prior to its use as a timber mill.

The site, known as the Cooroy Lower Mill Domain, is currently occupied by a number
of (vacant) buildings associated with the old timber mill activities. It is proposed to use
the site to create a cluster of wood working activities for community use through the
refurbishment, reuse and preservation of the old mill kiln, hopper and boiler building.

Previous environmental investigations at the timber mill site have identified a number
of areas as containing levels of soil contamination in excess of the Queensland
Environmental Protection Agency's (EPA's) Environmental Investigation Levels (EILs).
Figure 1 shows the location of the former timber mill infrastructure in relation to the
current allotment boundaries.

Based on the results of the investigations conducted across the allotments, the
aforementioned allotments can be used for non-sensitive commercial/industrial landuses
which includes premises such as shops and offices as well as factories and industrial
sites with minimal opportunities for contact with residual impacted soil, provided the
controls outlined herein are implemented and maintained. The proposed activities are
consistent with these land uses.

Soil impact left in place is discussed below.

Lot 2 RP47020:

Metal concentrations in excess of Queensland Environmental Protection Agency (Qld
EPA) Environmental Investigation Levels (EILs) remain onsite (as shown on Figure 2),

with maximum concentrations detected being:111mg/kg of arsenic, which is also above
Health-based Investigation Level (HIL) “A” ( standard residential with