Witteveen + Bos / ahu AG ahuag Wasser Boden Geomatik, Aachen (Tina Neef, Axel Meßling, Ulrich Lieser)
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1 ahuag Wasser Boden Geomatik, Aachen (Tina Neef, Axel Meßling, Ulrich Lieser) Symposium Expertisecentrum PFOS / PFAS Table of content 1. Some aspects of the situation in Germany 2. Examples - Firefightingstation(longtermusageofPFC) - Fire Fighting operation(one singular accident) 3. Conclusions 2 os_layout.pptx 1
2 Guide values /critical values drinkingwater Generellvalue of prevention 1 (apply to the sum PFOA+PFOS and potential more PFT) 100 ng/l LWTW 2 sum of PFOSand PFOA LWTWsumofPFBA Value of orientation for the sum of all per- und polyfluorinated compounds 300ng/l 700ng/l ng/l surface water UQN-value PFOS(valid from 22. Dezember 2018) 0,65 ng/l groundwater Suggestion of the minor threshold value of LAWA for PFOS 230 ng/l waste water (direct-and indirect discharger) discharge of cleaned groundwater into surface water Value of orientation for PFOA und PFOS 3 Value of orientation for sum of measured PFC 3 Individual decision of civil service depending on the water body on the basis of the deterioration prohibition according to 30 WHG and the UQN for PFOS 300ng/l 1.000ng/l food tolerable dailyintake(tdi) 0,15µg/kg KG 5 /d PFOS 1,5 µg/kg KG/d PFOA 1 statement of committee for drinking water of UBA 2 LWTW: guide value of committee for drinking water 3 3 Runderlass des Ministeriums für Klimaschutz, Umwelt, Landwirtschaft, Natur- und Verbraucherschutz des Landes Nordrhein-Westfalen vom , Az.: IV KG: body weight Example of target values for remedation os_layout.pptx 2
3 Existing Guidelines in Germany 5 Projekt example: fire station Project title Soil and groundwater investigations Description Dates since 2013 Specials Investigations on PFC contaminations around fire stations : investigation and consultation Supplementaryaspects (telomeres), diffuse dissemination 6 os_layout.pptx 3
4 Results of preliminary investigation 7 Soil eluate list of 10 LANUV PFC vs. list of 22 PFC in ng/l 8 os_layout.pptx 4
5 Soil eluate different entry of pollutants 9 Projekt example: fire fighting operation Project title Soil and groundwater investigations Description Dates since 2008 Specials Investigations on PFC contaminations asa result of a fire fighting operation Heterogeneousdissemination, differential dilution, in the beginning analytical aspects 10 os_layout.pptx 5
6 Soil pollution Max. concentration of original substance 12 os_layout.pptx 6
7 Soil pollution Max. concentration of soil eluat 13 Exposure pathway soil Groundwater mobilisation of PFC Summe PFC, 10er-Liste LANUV (µg/l) Column experiments (DIN 19528) Probe 38 A/3 - S, sl, u, b, g' Feststoffgehalt: µg/kg Summe PFC, 10er-Liste LANUV (µg/l) Probe 41/12 - gs, stark ms, fg' Feststoffgehalt: 210 µg/kg 2:1 2-4 :1 4-8:1 W/F (l/kg) PFNoA PFHxS PFBA PFHpA PFPA PFBS PFOA PFOS PFDA PFHxA PFHxS PFOS :1 2-4 :1 4-8:1 8-16: :1 W/F (l/kg) 10/2015 os_layout.pptx 7
8 Propagation of pollutants 15 2,5 km long 570 m wide main contaminants: PFOS and PFHxS Systematical view on every compartment PFC in plants Soil Entry into surface water Entry into groundwater Transport in coarse-grained sediments Transport in fine-grained sediments 16 os_layout.pptx 8
9 Sampling via methode of groundwater-direct Overview of the system 17 Conclusions (1) 18 PFC are already hazardous for groundwater if the detection limit is reached for analysing original soil substance One single accident can cause a very large groundwater contamination with very fast expansion rates Systematic and stepwise estimation of every pathway is absolutely necessary Lack of knowledge concerning assesmentcriteria, remediation possibilities and the range of parameters that have to be examined Challenging work of investigation and remediation because of fast developing and complex methods of investigation os_layout.pptx 9
10 Conclusions (2) Localisation of the source of contamination not only with analysis of the original substance but also with eluates Sorption of the PFC to fine-grained, humic-rich sediments is presumably Groundwater treatment concerning PFC is significantly extensive than treatment of standard contaminations (LHKW, BTEX) Substitute materials for PFC often bear the same or even new problems 19 Thank you for your attention! Do you have any questions? Tina Neef, Axel Meßling, Dr. Georg Meiners, 20 os_layout.pptx 10
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