11178 EAR 188 Whitehorse Road, Balwyn I February 2013
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Executive Summary Mr Peter Beale, General Manager, of the Silverton Group Pty Ltd engaged Dr Wayne Drew of Prensa Pty Ltd (Prensa) (formerly of Tonkin & Taylor Pty Ltd) to issue a Certificate of Environmental Audit for the site located at the whole of 188 Whitehorse Road and 23 Jersey Street, and part of 19 and 21 Jersey Street, Balwyn (the Site), refer to Figure 1, Appendix B. The audit has been requested as an Environmental Audit Overlay exists over the area of the site occupied by 188 Whitehorse Road, Balwyn and 23 Jersey Street, Balwyn. Table 1: Summary of environmental audit information EPA File Reference No. 70487-1 Auditor Dr Wayne Drew Auditor Term of Initially appointed as an Environmental Auditor on 6 September 1994, and is Appointment currently appointed from 5 March 2011 until 4 June 2014. Name of Person Mr Peter Beale requesting Audit Relationship to premises General Manager of Silverton Group Pty Ltd, owners of the audit site (i.e. / location including: the whole of 188 Whitehorse Road and 23 Jersey Street, and part of 19 and 21 Jersey Street, Balwyn). Date of Request 13 February, 2012 Date EPA notified of audit 13 February, 2012 Completion date of the 11 February, 2013 audit Reason for audit Environmental Audit Overlay Current land use zoning Business 2 Zone EPA Region Yarra Region Municipality Boroondara Dominant – Lots on Plan Part of CP100779. Note that lot number(s) are not listed on this title document. Additional – Lot on Plan/s Lot 2, PS418638 (23 Jersey Street). Title document copies are attached in Appendix D. Note that additional areas of land were also assessed (i.e. the rear of 19 Jersey Street (Lot 1 TP430539) and 21 Jersey Street (part of CP100779)) and are included in the audit although they are not within the boundary of the Environmental Audit Overlay. Site/premises name Not applicable - Building/complex sub- unit No. Not applicable Street/Lot – lower no 188 - Street/Lot – upper no Not applicable S0019:JF :11178 EAR 188 Whitehorse Road, Balwyn i February 2013 - Street name Whitehorse - Street type Road - Street suffix Not applicable - Suburb Balwyn - Postcode 3103 AND Street/Lot – lower no 19 and 21 (rear/western areas only), and 23 (whole of property) - Street/Lot – upper no Not applicable - Street name Jersey - Street type Street - Street suffix Not applicable - Suburb Balwyn - Postcode 3103 Coordinates of site centroid - Latitude (GDA94) -37.8125 - Longitude (GDA94) 145.0758 Site Area (hectares) Approximately 0.42 hectares Members and categories None of support team utilised Outcome of Audit Statement of Environmental Audit. The site is suitable for the following beneficial uses of the land subject to certain conditions: • Parks & Reserves, • Agricultural, • Sensitive use – high density (i.e. residential with minimal access to soil ), • Recreation/Open Space, • Commercial , and • Industrial . Groundwater is suitable for beneficial uses: • Buildings and Structures ; • Potable Drinking Water ; and • Maintenance of Ecosystems. Further work or Compliance with the Construction Management Plan (CMP) and the Project requirements Environmental Management Plan (PEMP) as prepared specifically for the site. Note that the PEMP is included within the CMP. Refer to Appendix H of this report for the CMP. Nature and extent of Primarily nitrate as N in groundwater. continuing risk S0019:JF :11178 EAR 188 Whitehorse Road, Balwyn ii February 2013 Table 2: Physical site information Site aquifer formation The aquifer is underlain by silty clayey Sand of the Brighton Group likely overlying the Silurian formation at depths greater than 6 to 8 metres. Depth to groundwater is approximately 3.6 to 5.2 metres below ground level. Average depth to 3.6 to 5.2 metres bgl groundwater Groundwater segment Segment B was adopted with total dissolved solids (TDS) reported within the range of 1,250mg/L to 5,300mg/L. Groundwater flow North west direction Past use/site history The Site has been used for industrial and commercial purposes from 1945 until present. Surrounding land use North: Commercial/Industrial and residential properties East: Service station and residential properties South: Residential properties West: A former service station, then low density residential housing. High Density Residential / Mixed Use Redevelopment, including a supermarket Proposed future use and two storey basement car park. Audit Summary Soil Assessment Results Following remediation of soils the remaining contaminants of concern beneath the Site were nickel and lead as listed in Table 10, Section 6.2. It must be noted that the reported results are below relevant health criteria for the proposed site development (i.e. NEPM HIL ‘D’). One soil analytical result was above the conservatively adopted NEPM HIL ‘A’ criteria for lead and another sample was above NEPM EIL (ecological) criteria for nickel, however values for these contaminants are well below criteria when considered in the context of statistically averaged concentrations across the Site (i.e. 95% UCL average concentrations). This Environmental Audit has been undertaken to assess the suitability of land for all potential land uses. The auditor considers that the site is conditionally suitable for all beneficial uses of land, as outlined below: • Parks & Reserves, • Agricultural, • Sensitive use – high density ( residential with minimal access to soil ), • Recreation/Open Space, • Commercial, and • Industrial. The site is considered unsuitable for the beneficial use of land Sensitive use – Other due to the potential for soil contamination to occur during existing site infrastructure demolition activities. It is noted that a management plan (i.e. a Construction Management Plan (CMP) incorporating a Project Environmental Management Plan (PEMP) as Section B) has been prepared and included in this audit report for the purposes of ensuring that the demolition is conducted appropriately. In addition a S0019:JF :11178 EAR 188 Whitehorse Road, Balwyn iii February 2013 responsible party (i.e.