Progress Report - Sites 26 (EATS) and 28 (WATS)
Restoration Advisory Board
Former NAS Moffett Field
January 14, 2010
Julie Crosby, Navy, and Dan Leigh, Shaw Group
Moffett RAB Progress Report- Sites 26 (EATS) and 28 (WATS)
1. Installation Restoration Sites 26 and 28
Abiotic / Biotic Treatability Study
Restoration Advisory Board Meeting
January 14, 2010
2. IR Site 26 Treatability Study
Purpose of Treatability Test
Determine if combined abiotic/biotic treatment is a viable remedial alternative
for mitigating the remaining chlorinated ethenes (CEs) present in the upper
portion of the A-aquifer at IR Site 26.
Treatability Study Method:
Conduct Pilot Test in area of highest CE concentration in upper A-Aquifer at
Site 26
Pilot Test Method:
Install wells in Pilot Test area
Determine baseline conditions in pilot test area
Inject EHC® into Aquifer
Measure Distribution of EHC®
Measure changes in pilot test area geochemistry
Measure changes in pilot test area CE concentrations
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19. Ethenes & Ethane- Molar Concentration
Average Inside Treatment Area
(WA-B-2, WU5-24, EXW-1)
0.7 PCE
0.6
TCE
Concentration (umol/L)
0.5
Total DCE
0.4
VC
0.3
Ethene
0.2
0.1 Ethane
0.0 Total
Ethenes &
-30 0 30 60 90 120 150 Ethane
Days (Day 0 = May 27, 2009)
20. Ethenes & Ethane- Molar Concentration
Average Outside of Treatment Area
(WA-B-1, WA-B-3, WA-B-4, WA-B-5)
0.7 PCE
0.6
TCE
Concentration (umol/L)
0.5
Total DCE
0.4
VC
0.3
Ethene
0.2
0.1 Ethane
0.0 Total
Ethenes &
-30 0 30 60 90 120 150 Ethane
Days (Day 0 = May 27, 2009)
21. Ethenes & Ethane - Molar Concentration
Average Downgradient of Treatment Area
(WA-B-1, WA-B-3, WA-B-4, WA-B-5)
0.8 PCE
0.7
TCE
Concentration (umol/L)
0.6
Total DCE
0.5
0.4 VC
0.3
Ethene
0.2
Ethane
0.1
0.0 Total
Ethenes &
-30 0 30 60 90 120 150 Ethane
Days (Day 0 = May 27, 2009)
22. W-AB-3 (Upgradient, 7 to 17 ft bgs)
Ethenes & Ethane - Molar Concentration
0.6 PCE
0.5 TCE
Concentration (umol/L)
0.4 Total DCE
0.3 VC
0.2 Ethene
0.1
Ethane
0.0
Total
-30 0 30 60 90 120 150 Ethenes &
Ethane
Days (Day 0 = May 27, 2009)
23. Relative Fraction of CEs, Ethene and Ethane
EXW-1
Treatment Area Wells
W-AB-2
WU5-24
Upgradient
Well
W-AB-3
24. Relative Fraction of CEs, Ethene and Ethane
W-AB-1
Downgradient Wells
W-AB-4
W-AB-5
25. Preliminary Conclusions Site 26 TS
• pH, ORP, SC, T, in the treatment area are within the range
considered appropriate for biotic and abiotic degradation of the CEs
• DO, nitrate, arsenic, manganese, iron, sulfate and methane reducing
conditions have been established in the treatment area.
• Degradation of CEs is occurring.
• Cis 1,2-DCE stall is not occurring.
• Complete conversion of CEs to non-toxic degradation products is
occurring.
• Dechlorinating microbial culture (DHC) is present in the treatment
area.
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26. 26 Treatability Study Schedule
January, 5, 2010 -2nd Quarter GW Sampling Event
March 29, 2010 – 3rd Quarter GW Sampling Event
June 28, 2010 – 4th Quarter GW Sampling Event
August 25, 2010 -Draft Treatability Study Results Technical Memorandum
October 27, 2010 -Final Treatability Study Results Technical Memorandum
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27. Expanded Pilot Test (Site 28) Methodology
Evaluate Three Technologies:
In Situ Anaerobic Biotic/Abiotic Degradation (ISABA)
EHC
In Situ Anaerobic Biostimulation with Bioaugmentation (ISABB) Process
Sodium Lactate & SDC-9
Emulsified Oil & SDC-9
Conduct Concurrent Pilot Tests in Three Areas:
Building 88 Area
Traffic Island Area
Well W9-18 Area
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28. Expanded Pilot Test Site 28
Well W9-19 ISABB - Emulsfied
Oil & SDC-9
ISABA - EHC
ISABB - Lactate &
SDC-9
Task 1
3
2
ConductMonitoring Wells
Install MIPs Investigation
Inject Substrates
29. Site 28 Pilot Test Schedule
February 2010 - Work Plans Finalized
March 2010 - MIPs Investigation
May 2010 -Treatability Study Progress Report
June, 2010 – Monitoring Well Installation
July, 2010 - Substrate Injection
August 2010 to July 2011 - Performance Monitoring
October 2011 – Treatability Study Final Report
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