Unit-IV; Professional Sales Representative (PSR).pptx
Site 28 In Situ Abiotic/Biotic Treatability Study Implementation
1. Installation Restoration Site 28
In Situ Abiotic / Biotic Treatability Study
I l t tiImplementation
RAB Meeting
November 18 2010November 18, 2010
Former Naval Air Station Moffett Field, Moffett Field, California
3. IR Site 28 Treatability Study
Purpose of Treatability Study (TS)
Determine if in situ anaerobic biotic or combined abiotic/biotic
treatment technologies are viable for remediating the
remaining chlorinated ethenes (CEs) present in the upper andg ( ) p pp
lower portions of the A-aquifer at IR Site 28.
Treatability Study Method
Conduct separate pilot tests in areas of highest CE
concentrations at three areas of interest (Former Building 88,
Traffic Island, and Well W9-18).
Stage 1: Hot Spot Characterization
Stage 2: Treatment Pilot Tests
4. Stage 1: Hot Spot Characterization
Hot Spot DelineationHot Spot Delineation
Further define lateral and vertical distribution of high concentration
chlorinated ethenes (CEs) in the three areas of interest.
Dense Non-Aqueous Phase Liquid (DNAPL) Investigation
Evaluate whether PCE DNAPLs are present in the Former Building 88
Area and Traffic Island Area
5. Stage 2: Treatment Pilot Tests
Evaluate Two Processes/Three Treatment Technologies
Separately:Separately:
In Situ Anaerobic Biostimulation with Bioaugmentation Process
Sodium Lactate (Wilclear®) & Dechlorinating Microbial Consortium (SDC-9™)Sodium Lactate (Wilclear ) & Dechlorinating Microbial Consortium (SDC 9 )
Emulsified Vegetable Oil (LactOil™) & SDC-9™
In Situ Anaerobic Biotic/Abiotic Degradation Process
Zero-valent iron with controlled-release carbon (EHC®)
Concurrent Pilot Tests in Three High Concentration Areas:
Traffic Island Area (LactOil™ & SDC-9™)
Building 88 Area (Wilclear® & SDC-9™)
Well W9-18 Area (EHC®)
8. IR Site 28 Treatability Study Implementation
Stage 1: Hot Spot CharacterizationStage 1: Hot Spot Characterization
March and April 2010p
Hot Spot Delineation
DNAPL Investigation
9. Hot Spot Delineation
Goal: Further define lateral and vertical distribution ofGoal: Further define lateral and vertical distribution of
high concentration chlorinated ethenes (CEs)
• Membrane Interface Probe (MIP) Testing
o Total depth of 65 feet below ground surface
o 19 locations in Traffic Island Area
o 12 locations in Former Building 88 Area
o 4 locations in Well W9-18 Area
15. DNAPL Investigation
Goal: Evaluate for the potential presence of PCE DNAPLs in
the Former Building 88 Area and Traffic Island Area
• Continuous Soil Cores
o Adjacent to MIP test with greatest detector responses
o Visual observation and PID scanning
o Select OilScreenSoil (Sudan IV)® Screening Tests
• H d h bi Fl ibl M b T ti• Hydrophobic Flexible Membrane Testing
o NAPL FLUTeTM Liner
o Adjacent to continuous soil coreso Adjacent to continuous soil cores
• 1 location in Former Bldg 88 Area; 2 locations in Traffic
Island Area
• Maximum depth of 65 feet below ground surface
• No evidence of DNAPLs encountered
28. IR Site 28 Treatability Study Implementation
Stage 2: Treatment Pilot TestsStage 2: Treatment Pilot Tests
July and August 2010y g
Observation Well Network Installation
Baseline Groundwater Monitoring Event
Substrate Preparation
Substrate Injection Substrate Injection
Post-Injection Performance Monitoring
39. Bioaugmentation
Addition of dechlorinating
i bi l ti t b t hmicrobial consortium to batch
mixing tank
Shaws Patented SDC-9™Shaws Patented SDC 9
Contains Dehalococcoides sp
Naturally occurring microbes
(not engineered)
Injected at hundreds of sitesInjected at hundreds of sites
Native to California
39
Injected at Former Building
88 Area and Traffic Island Area
47. Wilclear® & SDC-9™ Injection – Former Bldg 88 Area
• Original estimated sodium lactate demand for
t t t 1 060 lb (i l 4 ti f t f t )treatment area ~1,060 lbs (incl. 4 times safety factor)
• Due to anticipated high pH replaced 184 lbs of lactate
i h 55 lb f l i idwith 55 lbs of lactic acid
• 876 lbs of lactate with 55 lbs of lactic acid injected
• ~8,000 gallons of pre-treated GW from WATS injected
• 34 L of SDC-9 injected to generate a target
concentration of 1x107 cells DHC/liter
• 10 points, 35 to 60 ft bgs
49. LactOil™ & SDC-9™ Injection – Traffic Island Area
• Target concentration of 8 000 mg/L emulsifiedTarget concentration of 8,000 mg/L emulsified
vegetable oil in GW
• 3 190 gallons of LactOil™ injected3,190 gallons of LactOil injected
• ~28,000 gallons of pre-treated GW from WATS injected
• 119 L of SDC-9™ injected to generate a target
concentration of 1x107 cells DHC/liter
• 15 points, 10 to 65 ft bgs
52. EHC® Injection – Well W9-18 Area
• Original target ~0.3% of EHC® by soil massOriginal target 0.3% of EHC by soil mass
(~4,000 lbs EHC®)
• Doubled the dose to ~8,000 lbs EHC® based onDoubled the dose to 8,000 lbs EHC based on
IR Site 26 results
• ~8 000 lbs of EHC® injected~8,000 lbs of EHC® injected
• ~2,500 gallons of hydrant water injected
• No bioaugmentation with SDC-9™
• 4 points 10 to 30 ft bgs• 4 points, 10 to 30 ft bgs
54. Post-Injection
Performance Groundwater Monitoring
• 5 post–injection events:
g
p j
August 2010
early November 2010
late January 2010
mid April 2011
late June 2011
•All 24 observation wells + 3 monitoring wells
•Same analytical parameters as baseline event
VOCs, Biogeochemical Indicators, Organic Substrate
Indicators, Physical, and Biological
55. pH in Treatability Study Areas
W9-18Bldg 88Traffic Island
Treatability Study Wells
10.0
10.5
11.0
H Traffic Island - Emulsified Oil
pH
28OW-13
28OW-14
28OW-15
28OW-01 28OW-02
28OW-03 28OW-04
28OW-05 28OW-06
7.5
8.0
8.5
9.0
9.5
dardUnitsforpH
28OW-16
28OW-17
28OW-18
28OW-07 28OW-08
28OW-09 28OW-10
28OW-11 28OW-125.0
5.5
6.0
6.5
7.0
Stand
W9-18
W9-29 W9-42
W9-18 Area - EHC®
pH
8 0
Building 88 - Lactate
pH
0 20 40 60 80 100
Days (Day 0 = August 16, 2010)
10
11
12
orpH
p
7.0
7.5
8.0
sforpH
7
8
9
StandardUnitsfo
5 5
6.0
6.5
StandardUnits
5
6
0 20 40 60 80 100
S
Days (Day 0 = August 24, 2010)
5.0
5.5
0 20 40 60 80 100 120
Days (Day 0 = August 2, 2010)
56. ORP in Treatability Study Areas
W9-18Bldg 88Traffic Island
Treatability Study Wells
200
300
Traffic Island - Emulsified Oil
Oxidation-Reduction Potential
28OW-13
28OW-14
28OW-15
28OW-01 28OW-02
28OW-03 28OW-04
28OW-05 28OW-06-100
0
100
milliVolts
28OW-16
28OW-17
28OW-18
28OW-07 28OW-08
28OW-09 28OW-10
28OW-11 28OW-12-400
-300
-200
W9-18
W9-29 W9-42
W9-18 Area - EHC®
Oxidation-Reduction Potential
300
Building 88 - Lactate
Oxidation-Reduction Potential
0 20 40 60 80 100
Days (Day 0 = August 16, 2010)
100
200
300
olts
100
200
300
olts
-200
-100
0
milliVo
-200
-100
0
milliVo
56
-400
-300
0 20 40 60 80 100
Days (Day 0 = August 24, 2010)
-400
-300
0 20 40 60 80 100 120
Days (Day 0 = August 2, 2010)
57. DO in Treatability Study Areas
W9-18Bldg 88Traffic Island
Treatability Study Wells
2.0
2.5
g/L) Traffic Island - Emulsified Oil
Dissolved Oxygen
28OW-13
28OW-14
28OW-15
28OW-01 28OW-02
28OW-03 28OW-04
28OW-05 28OW-06
1.0
1.5
oncentration(mg
28OW-16
28OW-17
28OW-18
28OW-07 28OW-08
28OW-09 28OW-10
28OW-11 28OW-120.0
0.5
Co
W9-18
W9-29 W9-42
W9-18 Area - EHC®
Dissolved Oxygen
1 8
Building 88 ‐ Lactate
Dissolved Oxygen
0 20 40 60 80 100
Days (Day 0 = August 16, 2010)
2.5
3.0
3.5
(mg/L)1.2
1.4
1.6
1.8
(mg/L)
1.0
1.5
2.0
Concentration(
0.4
0.6
0.8
1.0
Concentration
57
0.0
0.5
0 20 40 60 80 100
Days (Day 0 = August 24, 2010)
0.0
0.2
0 20 40 60 80 100 120
Days (Day 0 = August 2, 2010)