Høfde 42 EU projekt - NorthPestClean DTU, 8. december 2010 www.regionmidtjylland.dk
Høfde 42 Høfde 42 Pesticide dumpsite 1953-1961 (Høfde 42) Cheminova 2 www.regionmidtjylland.dk
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Tværsnit af Høfde 42 5 www.regionmidtjylland.dk
Groyne 42 pesticide dumpsite Mass estimations: Ethyl-parathion Methyl-parathion Malathion Ethyl-sulfotep 170 tons 55 tons 18 tons 7 tons Location of contamination: Properties: 4-7 meters below surface Below the groundwater table Very low solubility in water High absorbance to soil Highly acute toxic 6 www.regionmidtjylland.dk
The process of alkaline hydrolysis OH - Degradation of the pesticides via nucleophilic substitution: Strong nucleophile (hydroxide ion) attacks electrophile Displaces a leaving (functional) group 7 www.regionmidtjylland.dk
2007-2009 Påvirkning af geokemi Feltforsøg Basisk hydrolyse Redoxforhold Laboratorieforsøg Basisk hydrolyse Bufferkapacitet Robusthed af materialer Søjleforsøg Biologisk nedbrydning Basisk hydrolyse + biologisk nedbrydning Vandretention Geologi, hydrogeologi Ventileringsforsøg Airsparging, vakuum test Batchforsøg Biologisk nedbrydning Identifikation af mikro.org. (Ph.D-studie) Biologisk rensning Demonstration Grundvandsmodel (PhD-studie, Post.Doc) 8 www.regionmidtjylland.dk
Koncept: 9 www.regionmidtjylland.dk
Status Pilotforsøg 2007-2009: Positive resultater, men ingen afklaring Ny strategi - forår 2009: Fokus på basisk hydrolyse Fokus på effektivitet Fokus på stop-kriterier EU finansiering 10 www.regionmidtjylland.dk
FINANCIAL APPLICATION FORMS LIFE+ ansøgningen 11 www.regionmidtjylland.dk LIFE + Nature and Biodiversity Environmental Policy and Governance Information and Communication Proposal acronym: NorthPestClean
NorthPestClean - et demonstrationsprojekt (LIFE+) Projekttype: Demonstrationsprojekt under EU programmet LIFE + Environment Policy & Governance Projektperiode: 1. September 2010 til 31. december 2013 Finansiering: EU kommissionens LIFE+09 program (50%) Region Midtjylland (~ 25%) Miljøstyrelsen (~ 25%) 12 www.regionmidtjylland.dk
NorthPestClean - et demonstrationsprojekt (LIFE+) Tre hovedformål: 1. In-situ basisk hydrolyse dokumentation af effektivitet 2. Afprøve enhancement metoder til at fremme kontakt mellem forurening og reaktant 3. Risikovurderings baseret stop-kriterier for oprensning Vigtigste output : Politisk beslutningsgrundlag for fuldskala-oprensning Formidling af resultaterne 13 www.regionmidtjylland.dk
NorthPestClean Projektets opbygning: Action 1: Projektledelse Action 2: Etablering af testceller Action 3: Implementering af demonstrationsforsøg Action 4: Monitoreringsaktiviteter Action 5: Miljømæssig risikovurdering og stop-kriterier Action 6: Decision basis / management support activities Action 7: Formidling Action 8: After-LIFE Communication plan 14 www.regionmidtjylland.dk
Regionens interne projektorganisation: Styregruppe Region Midt og Miljøstyrelsen Projektleder Morten Bondgaard Kommunikation Thomas Damgaard Budget/regnskab Thomas Damgaard Etablering af testceller Børge Hvidberg Demonstrationsforsøg Risikov./stopkrit. Morten, Lars, Kaspar Monitering Kaspar Rüegg Projektgruppen: Morten Bondgaard (projektleder, risikovurdering) Lars Ernst (hydrologi, geologisk modelarbejde, kort, risikovurdering) Børge Hvidberg (udbud, anlægsprojektering, rådgivning) Kaspar Rüegg (monitor, risikovurdering) Thomas Damgaard (kommunikationsansvarlig + budget/regnskab) Anja Melvej (arbejdsmiljøkoordinator + videnskabelig medarbejder) Hans Fredborg (ledelses forankring) 15 www.regionmidtjylland.dk
NorthPestClean - et demonstrationsprojekt Testområdet / testcellerne: 3 spunsceller 3 (4) rør ø2 m Fencing Test pipes 1 container til lab./lager Indhegnes Test cells Grædebrønd Test pipes Teknikbrønden 16 www.regionmidtjylland.dk
NorthPestClean Action 3: Implementation of demonstration trials Tender material (2010) Pre-treatment actions: Characterisation of each test cell -> original situation (April-May 2011) Preliminary lab-experiment with surfactants (2011-May 2012) 1st treatment: Cycle 1: Draining of the 4 cells (June 2011) Cycle 1: Injection (by gravity) of diluted NaOH-solution in all four cells (June 2011) 17 www.regionmidtjylland.dk
NorthPestClean 2nd and 3rd treatment cycle (2012-2013): Draining of each cell before next treatment Test cell 1 (the blind): Delivery: infiltration by gravity Contact: no contact enhancements Test cell 2: Delivery: Direct Push Technology Contact: Methods of recirculation of NaOH in the cell will be tested Test cell 3: Delivery: infiltration by gravity Contact: vibration technology in combination with recirculation Test cell 4 Delivery: infiltration by gravity Contact: surfactant/naoh-mixture in combination with recirculation 18 www.regionmidtjylland.dk
NorthPestClean Documentation of efficacy: 1) Pre-treatment characterisation (of each cell) 1) Geology 2) Hydrogeology 3) Initial contamination: Water samples: 10 wells, 3 depths (30 samples/cell) Sediment samples: 10 wells, 7 depths (70 samples/cell) 2) Documentation between each cycle of treatment 1) Hydrolysis progress water samples: 10 wells, 1-3 depths, 4 rounds (120 samples/cell) 2) Clean-up effect water samples: discharge water (10 samples/cell) Sediment samples: 4 wells, 7 depths (28 samples/cell) 3) Final documentation 1) Hydrolysis progress water samples: 10 wells, 1-3 depths, 4 rounds (120 samples/cell) 2) Clean-up effect water samples: discharge water (10 samples/cell) Sediment samples: 10 wells, 7 depths (70 samples/cell) Output: -Mass removal - Concentration reductions (in water and sediments) 19 www.regionmidtjylland.dk
NorthPestClean Remediation stop-criteria based on environmental risk assessment Objective: Eliminate unacceptable risk to the aquatic environment Risk assessment: Exposure assessment Ecotoxicological risk assessment... for different clean-up scenarios! Output 1: Output 2: Measurable stop-criteria for remediation (e.g. flux, mass removal, groundwater concentrations) Political decision-basis report (2014) for decision on full-scale remediation! 20 www.regionmidtjylland.dk