• The Scope of Work • Regulatory Process • Treatment Results • Implications for Future PFAS Impacted Soils
PRESENTATION AGENDA
Enviropacific is a specialist infrastructure services provider delivering sustainable engineering, applied science and project management solutions.
WHO WE ARE
Stopping, preventing and reversing environmental damage
• Environmentally-focused • Specialist contractor • National platform
• Confidential client and site • PFAS impacted material stockpiled, approximately 2,000T • Source of stockpiled PFAS impacted material was from drainage swale rectification works • Sum of PFOS & PFHxS greater than 50mg/kg (max. conc’n 75.6mg/kg, TCLP 2.24mg/L) • Thermal destruction deemed most appropriate treatment approach • Opportunity to utilise material to complete POP test at SOLVE • Section 30a approval (#189604)to store and treat up to 2,400T of PFAS impacted soils
MANAGEMENT OF PFAS IMPACTED SOILS THE PROBLEM
• Client-specific approvals to commence work and Interstate Transport Consignment Authorisation
• QHS&E requirements including a PFAS decontamination procedure, TMP, SWMSs etc. • Approval to work >5m in a restricted airfield space • Site establishment works – construct stabilised access road, geofab marker layer,
rumble grid at exit point, mobile decon unit, erosion and sediment controls • Manage ALL soil movements from client site to final end-use of soils including a
rigorous materials tracking system • Validation sampling of final surface in conjunction with consultant • Reinstatement – hydroseeding and ongoing watering for 1 month
MANAGEMENT OF PFAS IMPACTED SOILS SCOPE OF WORK
• Proven experience • >70,000T PFAS impacted soils treated
• Regulatory approvals – Section 30a in place
• Up to 35T/hr throughput • Rapid response
THE SOLUTION WHY WAS ENVIROPACIFIC ENGAGED?
• Work undertaken in Jan-Feb 2019 • Approximately 2,000T transported under
Consignment Authorisation (#185272) • Feed soil tested at SOLVE
• Stockpile samples ->23.9 – 39.6mg/kg • Mainly PFSAs, PFOS and PFHxS • ASLP typically >1mg/L (PFOS + PFHxS)
• Operating Conditions • Soil Feed Rate - 30T/hr average • Soil temperature – 491oC (max.) • Oxidiser Temp - 968oC (max.)
THE SOLUTION SUMMARY OF WORK PERORMED
• Emissions testing performed in accordance with licence requirements
• Emissions data compared to EU Directive Limits
• Analytes include: total dust, gaseous VOCs, HCL, HF, SO2, NO2, CO, metals, dioxins/furans, PAHs, PFAS
• PFAS < LOR • All emissions within mass flow EU
Directive limits
THE SOLUTION EMISSIONS RESULTS SUMMARY
• Testing Criteria • IWRG 621 (organics,pH, metals/inorganics) • ASLP–VicEPA Interim Landfill Criteria (PFAS)
• Treated soil classification – non-PIW • Final end use – landfill construction /
rehabilitation
THE SOLUTION TREATED SOIL RESULTS SUMMARY
• POP Test Report submitted to Vic EPA • Awaiting response (legislated 60-day
timeframe exceeded) • No issues raised
• Overall Operating Licence amendment
NEXT STEPS IMPLICATIONS FOR FUTURE PFAS SOIL TREATMENT
• Thermal treatment is a proven, commercial option for PFAS impacted soils • Enviropacific provide a “Whole of Life” solution • Other waste streams are currently being tested
• Biosolids • Concrete • Concentrate
CONCLUSIONS Summary