National Contamination Management Program Project Decision Tree Contamination

National Contamination Management Program – Project Decision Tree Contamination Hazard Assessment Tool (CHAT) Stage 1 - DEHP Stage 1 Preliminary Investigation and CSM CHAT Hazard Category = Medium to Very High Refer to Defence checklist for Stage 1 Investigations START Preliminary Risk Assessment Using the C-RAT Outcome = Low Risk CHAT Hazard Category = Low C-RAT Outcome = Medium to Very High Risk 3 -Year Review of Risk START Stage 2 - DEHP Stage 2 Detailed Site Investigation Soil /groundwater/ sediment sampling & analysis, and comparison of results to published investigation levels. No Further Action or Refer to Defence checklist for Stage 2 Investigations Implement Pollution Prevention or Contamination Management Controls No Is there sufficient data to adequately delineate the extent of contamination Yes C-RAT Outcome = Low Risk Review of C-RAT Outcomes Based on Stage 2 Outcomes C-RAT Outcome = Medium to Very High Risk Yes Will site management controls reduce the contamination risk to low ? No Yes Based on the results of the risk assessment, will site management controls reduce the contamination risk to low ? Review of C-RAT Outcomes Based on Results of Risk Assessment Human Health or Ecological Risk Assessment Derivation of site specific acceptance levels No Development of Cost Estimate Stage 3 DEHP Provision Recorded Stage 4 – DEHP or MUL Remediation Options Assessment Remediation Design Document (RDD) and Tender Documents Cost Benefit Analysis Technology Review Sustainability Assessment Engagement of Remediation Contractor On basis of RDD Selection of Remediation Strategy Contractor to Prepare Remediation Documentation: Environmental Clearance Certificate (ECC) Remediation Works Plan (RWP) Occupational Health and Safety Plan (OH&S) Environmental Management Plan (EMP) Initial Environ -mental Review (IER) Remediation Workshop Implementation of RAP Remediation Feasibility Study (RFS) and Pilot Trial Remediation Action Plan (RAP) Do the RFS and pilot trial demonstrate that the remediation strategy will be effective to reduce the contamination risk to low? Notify Assistant Director Environmental Provisions Site Validation Contractor to Obtain All Relevant Permits and Approvals Review of C-RAT Based on Validation Outcomes Prepare Validation Report No Stage 4 DEHP Does site validation demonstrate that the remediation objectives have been met ? Yes No Yes