Pennoni Associates Inc. Consulting Engineers - … · Providing Engineering Services Since 1966...
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Providing Engineering Services Since 1966 Pennoni Associates Inc. Consulting Engineers SUCCESSFUL ERD PILOT STUDY IN RESIDUAL DNAPL UTILIZING A SIMPLE ADDITIVE DELIVERY APPROACH I. Richard Schaffner and Kevin J. Davis, P.E.; Pennoni Associates, Inc. Kent C. Armstrong, BioStryke Remediation Products, LLC
Transcript of Pennoni Associates Inc. Consulting Engineers - … · Providing Engineering Services Since 1966...
Providing Engineering Services Since 1966
Pennoni Associates Inc. Consulting Engineers
SUCCESSFUL ERD PILOT STUDY IN RESIDUAL DNAPL UTILIZING A SIMPLE
ADDITIVE DELIVERY APPROACH
I. Richard Schaffner and Kevin J. Davis, P.E.; Pennoni Associates, Inc. Kent C. Armstrong, BioStryke Remediation Products, LLC
Presentation Outline
ERD Review
Site Background
Pilot Study Methods
Results
Conclusions
ERD Review
• RD = Substitution of H for Cl
• Environmental Conditions
– Anaerobic (<0.5 mg/L DO) – Chemically Reducing (<50 mV) – Hydrogen – ‘fuel for dechlorination’
• Mechanisms
– Metabolic (Dehalorespiration) – Co-metabolic (minor mechanism) – Abiotic reactions (e.g., FeS) – Solubilization (co-solvency) Dehalococcoides
Electron Ladder Theory
Unifying Field Theory of Microbial Respiration Organic Carbon
Oxygen H2O
Mn (IV)
Mn (III)
Iron (III) Iron (II)
Sulfate H2S
CO CH4
cVOCs Ethene / Ethane
2
ERD
Nitrate NH+, N2
Site Background
Site History: Electronics Manufacturer, East Central Ohio Incidental TCE Spillage
Conceptual Site Model: ~15’ to ~20’ of Overburden (Sand, Silt, Clay) Fractured Sandstone / Shale contact at 15’ to 20’ Bedrock Impacted Zone ~10 feet Thick Baseline cVOC Signature:
- Total Parents: ~50 - 550 ppm; TCE - Total Daughters: ~10 - 15 ppm; 1,2-DCE - Parent Fraction: 80% - 99%
P&T Implemented to Manage Migration Operational since 2005
Conceptual Site Model
Pilot Study Methods
• PRSs with ERDENHANCED™ (BioStryke Remediation Products, LLC)
– Baseline no purge sampling – PRS deployment – No-purge perform. sampling
• VOCs + MNA Indicators • CENSUS® Assay
• PRS deployment units replaced when depleted (every 6-8 weeks)
• Provides Go-No-Go Efficacy Evaluation
• Performed under actual site biogeochemical conditions
Well with deployed PRS
Ground surface
Groundwater Flow Direction
Graphical Representation, To
Well with deployed PRS
Ground surface
Groundwater Flow Direction
Graphical Representation, To+1
Well with deployed PRS
Ground surface
Groundwater Flow Direction
Graphical Representation, To+2
Well with deployed PRS
Ground surface
Groundwater Flow Direction
Graphical Representation, To+3
Well with deployed PRS
Ground surface
Groundwater Flow Direction
Graphical Representation, To+4
Area of Influence
Results, TCE
1
10
100
1000
10000
100000
1000000
7/10/2012 10/18/2012 1/26/2013 5/6/2013 8/14/2013 11/22/2013 3/2/2014 6/10/2014
TC
E (
µg/L
)
Date (mm/dd/yyyy)
MW-30A
MW-31A
MW-38A
Bas
elin
e
Results, c-1,2-DCE
1
10
100
1000
10000
100000
7/10/2012 10/18/2012 1/26/2013 5/6/2013 8/14/2013 11/22/2013 3/2/2014 6/10/2014
TC
E (
µg/L
)
Date (mm/dd/yyyy)
MW-30A
MW-31A
MW-38A
Bas
elin
e
Results, MW-30A
1.00E-09
1.00E-08
1.00E-07
1.00E-06
1.00E-05
1.00E-04
1.00E-03
1.00E-02
1.00E-01
1.00E+00
7/10/2012 10/18/2012 1/26/2013 5/6/2013 8/14/2013 11/22/2013 3/2/2014 6/10/2014
Mo
lari
ty (
mo
l/L)
Date (mm/dd/yyyy)
TCE
c-1,2-DCEB
asel
ine
Results, MW-31A
0.00E+00
5.00E-05
1.00E-04
1.50E-04
2.00E-04
2.50E-04
3.00E-04
3.50E-04
4.00E-04
4.50E-04
10/18/2012 5/6/2013 11/22/2013 6/10/2014
Mo
lari
ty (
mo
l/L)
Date (mm/dd/yyyy)
TCE
c-1,2-DCE
Bas
elin
e
Results, MW-38A
1.00E-05
1.00E-04
1.00E-03
1.00E-02
7/10/2012 10/18/2012 1/26/2013 5/6/2013 8/14/2013 11/22/2013 3/2/2014 6/10/2014
Mo
lari
ty (
mo
l/L)
Date (mm/dd/yyyy)
TCE
c-1,2-DCEB
asel
ine
Results, Molar Parent Fraction
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
1/26/2013 5/6/2013 8/14/2013 11/22/2013 3/2/2014 6/10/2014
Mo
lar
Par
ent
Fra
ctio
n (
%)
Date (mm/dd/yyyy)
MW-30A
MW-31A
MW-32A
MW-38A
Bas
elin
e
MNA Parameters:
– Up to 1,000X [diss Fe/Mn] increase
– General decrease in [sulfate]
– General decrease in ORP values
– General increase in [methane]
– Spiked increases in [TOC] following each PRS replacement-deployment event
– Elevated [Ethene] & [Ethane]
Results
Results
CENSUS® Assay: – BioTraps® for each well amended with
ERDENHANCED™ filled PRS deployment units
» Generally positive bio-indicator values » tceA gene, bvcA gene, vcrA gene
– BioTrap® for background well non-detect for same parameters.
CONCLUSIONS
Baseline [TCE] 55-550 mg/L
80-99.9%REDUCTION in [TCE] over ~1 year
MNA indicator signatures consistent with reductive dechlorination
Positive change in microbial community and treatment zone geochemistry to favor dechlorinators
Evidence of both biotic and abiotic dechlorination
Questions
I. Richard Schaffner, Jr. Senior Consultant / Hydrogeologist
Office 856-656-2887 | Mobile 603-703-3887
Kent C. Armstrong BioStryke® Remediation Products, LLC
