Integrated Use of EHC and KB-1 for TCE Remediation

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Presentation describing results of bench and field pilot of combined EHC+KB-1 for remediation of TCE and its daughter products in groundwater.

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Integrated Use of EHC and KB-1 for TCE Remediation

  1. 1. Integrated use of EHC™ and KB-1 for Source Area Treatment and PRB Applications at a TCE-Impacted Site James Peale, Erik Bakkom – Maul Foster & Alongi, Inc. Fayaz Lakhwala, Jim Mueller, Josephine Molin, Eva Dmitrovic – Adventus Americas Inc. Phil Dennis – SIREM Maul Foster & Alongi, Inc.
  2. 2. Topics Site Overview Bench Test Summary Pilot Study – Riverbank PRB – Source Area Treatment Zone Results Summary MAUL FOSTER ALONGI INC.
  3. 3. Results Breakdown Primary lines of evidence – TCE, cis-1,2-DCE and isomers, vinyl chloride – Ethene, chloride Dehalococcoides assays Confirmation of ISCR – Sulfate, methane MAUL FOSTER ALONGI INC.
  4. 4. Site Overview Property used for MGP waste disposal (1940s- 1960s) MGP waste ponds filled with quarry spoils, dredged material (1960s-1970s) Property redeveloped for manufacturing in 1980 TCE or TCE wastewater released from a recycling system (1980-1985) Impacts from release discovered in 2002 MAUL FOSTER ALONGI INC.
  5. 5. Site Overview Source Zone (2006 data) – Impacts from about 50-105 ft bgs – TCE up to 592,000 ug/L – Cis-1,2-DCE up to 90,800 ug/L – Very little VC (max 54 ug/L) – Extensive MGP impacts from 20-45 ft bgs – TCE concentrations suggest TCE DNAPL • Not found MAUL FOSTER ALONGI INC.
  6. 6. Site Overview Riverbank (2005-2006 data) – Impacts from about 80-140 ft bgs – TCE up to 8,640 ug/L – Cis-1,2-DCE up to 34,000 ug/L – VC up to 5,170 ug/L – 2-3 ft MGP DNAPL ~125 ft bgs MAUL FOSTER ALONGI INC.
  7. 7. Site Overview Riverbank Pilot Source Area MAUL FOSTER ALONGI INC.
  8. 8. Site Overview EVS shots MAUL FOSTER ALONGI INC.
  9. 9. Site Overview EVS shots MAUL FOSTER ALONGI INC.
  10. 10. Site Overview EVS shots MAUL FOSTER ALONGI INC.
  11. 11. Alternatives Screening Objective – reduce cVOC impacts while MGP investigation continues – Oxidation – Heating – GCWs – ISCR/Biodegradation – selected for bench test MAUL FOSTER ALONGI INC.
  12. 12. Time for a Bench Test Collected cores and groundwater Tested EHC, lactate, and emulsified oil – With and without KB-1, multiple runs Conclusions – EHC and EOS demonstrated similar performance, outperformed lactate – EHC+KB-1 outperformed all other tests – Degraded 600,000+ ug/L TCE to ND without accumulation of intermediates – 42 days MAUL Move forward with EHC+KB-1 pilot FOSTER ALONGI INC.
  13. 13. Pilot Study Summary Installed EHC (ZVI) and KB-1 (Dhc) PRBs in two areas: source zone and riverbank (June 2006) Injected 50-100 feet bgs in source zone; 90-130 feet bgs at riverbank – Direct-push; injection pressures ~ 400psi Monitored monthly from June 2006 to present MAUL FOSTER ALONGI INC.
  14. 14. Source Area Layout MAUL FOSTER ALONGI INC.
  15. 15. Results – cVOCs Source Area Time TCE DCE VC Sum % TCE % cVOC cVOCs Well (ug/L) (ug/L) (ug/L) Removal Removal (ug/L) Shallow Injection 6,500 89,010 30 95,540 PRB 99.48 33 +9 mos 33.5 25,839 43,300 63,756 Deep Injection 92,900 39,497 22 132,419 PRB 99.99 55 +9 mos 62.5 43,914 15,500 59,476 Shallow Injection 7,990 91,624 26 99,640 Down- 92 35 gradient +9 mos 678 42,502 21,200 64,380 (10 ft) Deep Injection 198,000 34,133 41 232,174 Down- 81 17 MAUL gradient +9 mos 36,800 151,177 5,190 193,167 FOSTER (10 ft) ALONGI INC.
  16. 16. Results PRB – Combined Trend Analysis 9.5 8.5 7.5 6.5 y = 0.0291x - 1130.1 Ln Concentration (uM/L) - PRB Wells 2 R = 0.9261 5.5 4.5 3.5 2.5 1.5 0.5 y = -0.0246x + 960.24 2 R = 0.6593 -0.5 -1.5 -2.5 MAUL Jun-06 Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 FOSTER TCE DCE VC Ethene Sum of Ethenes Chloride TCE Trend VC Trend ALONGI INC.
  17. 17. Riverbank Layout MAUL FOSTER ALONGI INC.
  18. 18. Results – cVOCs Riverbank Area Well Time TCE DCE VC Sum % TCE % cVOC (ug/L) cVOCs Removal Removal (ug/L) (ug/L) (ug/L) Within Injection 584 3,074 474 4,132 PRB 100 99 +9 mos <0.3 4.3 34 38.6 10 ft Injection 158 34,104 5,170 39,432 99.5 96.7 Down- gradient +9 mos 0.81 842 448 1,291 20 ft Injection 1,100 10,067 1,610 12,777 100 99.99 Down- gradient +9 mos <0.3 0.38 <0.3 0.98 MAUL FOSTER ALONGI INC.
  19. 19. Riverbank Results Downgradient Well (20 ft) 10,000.00 1,000.00 100.00 10.00 uM/L 1.00 0.10 0.01 0.00 Jun-06 Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 MAUL TCE sum DCE Vinyl chloride Ethene sum ethenes Chloride MRL FOSTER ALONGI INC.
  20. 20. Riverbank Results DCE and VC – Late Data 100.00 10.00 1.00 uM/L 0.10 0.01 0.00 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 MAUL MRL PRB DCE PRB VC Downgradient DCE Downgradient VC FOSTER ALONGI INC.
  21. 21. Gene-Trac Assay Results Source Zone Well Date %Dhc Dhc count WS-13-69 Oct-06 0.3% 3E+04 (upgradient) Jan-07 0.002% 1E+03J WS-13-105 Oct-06 26% 4E+07 Riverbank Area (upgradient) Jan-07 27% 5E+06 Well Date %Dhc Dhc count WS-19-71 Oct-06 24% 4E+07 WS-21-112 Sep-06 ND ND (within PRB) Jan-07 100% 4E+09 (upgradient) Dec-06 0.002% 1E+03J WS-19-101 Oct-06 64% 4E+08 (within PRB) Jan-07 80% 4E+08 WS-22-112 Sep-06 1% 2E+06 WS-18-71 Oct-06 0.03% 6E+04 (within PRB) Dec-06 33% 4E+09 (Downgradient) Jan-07 34% 7E+07 WS-11-125 Sep-06 10% 6E+07 WS-18-101 Oct-06 0.2% 7E+05 (Downgradient) Dec-06 9% 8E+07 (Downgradient) Jan-07 5% 1E+07 WS-20-112 Oct-06 68% 2E+09 (Downgradient) Dec-06 43% 1E+09 MAUL FOSTER ALONGI INC.
  22. 22. Redox Indicators Source Area Approximately 160 mg/L 100 90 Geometric mean of SO4 in DNG-Shallow: 296 mg/L %TCE Removal: 91.5% %cVOC Removal: 35% 80 70 60 mg/L 50 40 30 20 10 0 Jun-06 Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 PRB SO4-Shal PRB CH4-Shal PRB SO4-Deep PRB CH4-Deep DNG-CH4-Shal MAUL DNG-SO4-Deep DNG-CH4-Deep FOSTER ALONGI INC.
  23. 23. Redox Indicators Riverbank 100 90 80 70 60 mg/L 50 40 30 20 10 0 Jun-06 Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 MAUL PRB SO4 PRB CH4 1st DNG SO4 1st DNG CH4 2nd DNG SO4 2nd DNG CH4 FOSTER ALONGI INC.
  24. 24. Summary Very rapid and total dechlorination Riverbank – abiotic>biological Source area – biological>abiotic Combined approach doesn’t allow for quantifying individual rates KB-1 distribution downgradient Good confirmation of ISCR MAUL FOSTER ALONGI INC.
  25. 25. Summary Effective in spite of interference factors – Sulfate, silt, MGP DNAPL Effective in potential TCE-DNAPL source zone Effective at significant depth MAUL FOSTER ALONGI INC.
  26. 26. Questions MAUL FOSTER ALONGI INC.
  27. 27. Supplemental Results PRB - Shallow 10,000.00 1,000.00 100.00 uM/L 10.00 1.00 0.10 MAUL Jun-06 Jul-06 Aug-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 FOSTER TCE DCE VC Ethene Sum of Ethenes Chloride ALONGI INC.
  28. 28. Supplemental Results PRB - Deep 10,000.00 1,000.00 100.00 uM/L 10.00 1.00 0.10 0.01 Jun-06 Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 MAUL FOSTER TCE DCE VC Ethene Sum of Ethenes Chloride ALONGI INC.
  29. 29. Supplemental Results Downgradient -Shallow 10,000.00 1,000.00 100.00 uM/L 10.00 1.00 0.10 0.01 Jun-06 Jul-06 Aug-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 MAUL TCE Sum DCE Vinyl chloride Ethene Sum Ethenes Chloride FOSTER ALONGI INC.
  30. 30. Supplemental Riverbank Results PRB Well 10,000.00 1,000.00 100.00 10.00 uM/L 1.00 0.10 0.01 0.00 Jun-06 Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 MAUL TCE sum DCE Vinyl chloride Ethene sum ethenes Chloride MRL FOSTER ALONGI INC.
  31. 31. Supplemental Riverbank Results Downgradient Well (10 ft) 10,000.00 1,000.00 100.00 10.00 uM/L 1.00 0.10 0.01 0.00 May-06 Jun-06 Jul-06 Aug-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 MAUL TCE sum DCE Vinyl chloride Ethene sum ethenes Chloride MRL FOSTER ALONGI INC.

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