CVEN4051B remedial option report University of New South Wales CVEN 4051

BOTANY INDUSTRIAL PARK REMEDIAL ACTION PLAN 2020 Jaehyeok Lee z University of NSW Conten 1. Introduction............................................................................................................4 1.1 Introduction..................................................................................................4 1.2 Scope............................................................................................................4 1.3 Feasibility Assessment Structure..................................................................4 2. Site setting................................................................................................................5 2.1 Site Identity..................................................................................................5 2.1.1 Site description.......................................................................................5 2.1.2 Site history.............................................................................................6 2.1.3 Site Surrounding area.............................................................................6 2.2 Site Environmental setting...........................................................................6 2.2.1 Climate...................................................................................................7 2.2.2 Geology..................................................................................................7 2.2.3 Topography/ Hydrology...........................................................................8 2.3 Hydrogeology...............................................................................................8 2.3.2 Groundwater flow history..........................................................................8 2.4 Sensitive environmental receptors............................................................9 3. CSM...........................................................................................................................9 3.1 Contaminants of potential concern (COPC)..................................................9 3.1.1 Source of contamination.........................................................................9 3.2 Nature of the Contamination......................................................................10 3.2.1 Vapour phase.......................................................................................10 3.2.2 Aqueous phase.....................................................................................10 3.2.3 Solid phase...........................................................................................10 3.2.4 DNAPL phase........................................................................................10 3.3 Environmental media.................................................................................10 3.4 Exposure pathways....................................................................................11 3.5 Potential Receptors.....................................................................................11 3.6 Risk assessment on human health.............................................................11 3.7 Risk assessment on environment...............................................................11 4. Development/Assessment of remediation options.................................................12 4.1 Remediation objective................................................................................12 4.2 Remediation goal........................................................................................12 4.3 Site-Specific Protection Requirements(SSPR).............................................12 4.4 Methodology long-list.................................................................................13 4.5 Preliminary screening assessment.............................................................14 4.5 Feasibility assessment................................................................................15 4.5.1 Nano-remediation(nZVI).......................................................................15 4.5.2 Electrokinetic Separation(ES)...............................................................18 4.5.3 Surfactant enhanced aquifer remediation(SEAR).................................20 4.6 Preferred Remediation option.....................................................................22 5.Validation.................................................................................................................23 6.References...............................................................................................................24 Y Figure 1 Site Location....................................................................................................5 Figure 2 Mean total monthly rainfall.............................................................................7 Figure 3 Long-term rainfall pattern...............................................................................7 Figure 4 Current estimated flow direction and hydraulic head (Orica Botany, 2017)...9 Figure 5 extent of contamination (Orica Botany, 2017)..............................................13 Figure 6 Electrokinetic separation (FRTR, -)................................................................18 Figure 7 Areas where clay comprises 10% (Orica Botany, 2017)............................22 Table 1 BIP site description...........................................................................................5 Table 2 Southland blocks site description.....................................................................5 Table 3 Conceptual groundwater flow regime over period...........................................8 Table 4 BCR comparison..............................................................................................22 1. Introduction 1.1 Introduction This document is created to provide various remediation options and set up the remediation strategies for the BIP to protect the human health and environment around the model area. Orica was announced by The NSW Environmental protection Authority(EPA) to clean up the contaminated land. Orica investigated and assessed the model area and created a Conceptual Site Model (CSM). The CSM provided by Orica[CITATION Ori17 l 1042 ] has widely contributed over this document to develop the remediation objectives and to setup the remediation goals. This document contains assessment of number of possible methodologies in