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Integrated Use of EHC and KB-1 for TCE Remediation
 

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.

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 Integrated Use of EHC and KB-1 for TCE Remediation Presentation Transcript

    • 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.
    • Topics Site Overview Bench Test Summary Pilot Study – Riverbank PRB – Source Area Treatment Zone Results Summary MAUL FOSTER ALONGI INC.
    • 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.
    • 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.
    • 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.
    • 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.
    • Site Overview Riverbank Pilot Source Area MAUL FOSTER ALONGI INC.
    • Site Overview EVS shots MAUL FOSTER ALONGI INC.
    • Site Overview EVS shots MAUL FOSTER ALONGI INC.
    • Site Overview EVS shots MAUL FOSTER ALONGI INC.
    • Alternatives Screening Objective – reduce cVOC impacts while MGP investigation continues – Oxidation – Heating – GCWs – ISCR/Biodegradation – selected for bench test MAUL FOSTER ALONGI INC.
    • 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.
    • 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.
    • Source Area Layout MAUL FOSTER ALONGI INC.
    • 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.
    • 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.
    • Riverbank Layout MAUL FOSTER ALONGI INC.
    • 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.
    • 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.
    • 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.
    • 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.
    • 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.
    • 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.
    • 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.
    • 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.
    • Questions MAUL FOSTER ALONGI INC.
    • 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.
    • 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.
    • 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.
    • 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.
    • 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.