Eric M. Nichols, PE Amy Goldberg Day
|
|
- Ashlie Maxwell
- 5 years ago
- Views:
Transcription
1 Case Study of Subsurface Vapor Intrusion at a Dry Cleaner Site Amy Goldberg Day Amy.Goldberg.Day@lfr.com Eric M. Nichols, PE Eric.Nichols@lfr.com AEHS 14th Annual West Coast Conference on Soils, Sediments and Water
2 Outline Background Conceptual Site Model Data Collection: Groundwater Soil gas Indoor air Vapor Intrusion Modeling Results Comparison of Attenuation Factors Observations and Conclusions
3 Background Shopping center in Central California with 3 dry cleaners Routine disposal of dry cleaning fluids into sanitary sewer Sewer line leaks resulted in PCE releases PCE identified in downgradient municipal drinking water well Dry cleaners implicated and ordered to perform RI/FS type investigation
4 Background, Continued Interbedded fine-grained sediments to ~25 ft bgs Discontinuous coarse-grained sediments from ~25 to 50 feet bgs Depth to groundwater ~50 feet bgs Human health risk assessment performed using applicable data considering source and non-source areas
5 Background, Continued Existing buildings slab-on-grade Some buildings had historical use of PCE All buildings have commercial use Subject building 6000 ft 2 Expected transport mechanisms: Diffusion from source zones Advection and diffusion across foundation
6 Source Area Former Dry Cleaner Sewer Line Subject Building
7 Groundwater Data Summary 3 yrs of quarterly monitoring from 18 A-zone wells Analyzed using EPA Method 8260A Source-area PCE detected in 13 of 13 samples: 5,000 to 85,000 µg/l 95% UCL 48,300 µg/l Non-source-area PCE detected in 118 of 124 samples: 1.5 to 12,000 µg/l 95% UCL 1,800 µg/l
8 Soil Gas Data Summary Soil gas samples collected from March 1997 through June 1998 Used syringe collection technique Analyzed via on-site mobile lab using EPA Method 8010 with Hall detector 378 samples collected from 0 to 10 feet bgs 77 source-area PCE samples: maximum detected 39,490 µg/l 304 non-source area PCE samples: 1.0 to 9,060 µg/l 95% UCL 605 µg/l
9 Flux Chamber Data Summary 13 indoor sample locations on observed floor seams and cracks 4 outdoor locations in planter boxes Collection rate 1 L/min in 6-L evacuated canisters TO-14 SIM PCE detected in all indoor samples Flux range 0.29 to 26 µg/min-ft
10 Air Data Summary Indoor air samples collected in 6 buildings, 1 located over source area, 3 outdoor samples 15 samples collected over source area in 5 separate sampling events over 14 months 1 sample collected in each of the other buildings Samples collected in evacuated canisters over a 24-hour or 8 hour period
11 Air Data Summary Subject building vacant during first air sampling event Doors closed; HVAC on Cracks and seams were sealed before third sampling event Similar results Building was reoccupied and floor covering added before fourth sampling event Fourth and fifth sampling events were during normal business hours, with doors opening and closing throughout day
12 Air Data Summary, Continued Method TO-14 SIM PCE detected in all source-area indoor air samples: to µg/l 95%UCL µg/l PCE detected in all non-source area air samples: to µg/l 95%UCL0.029 µg/l PCE slightly analytical reporting limits in 2 outdoor samples ( & µg/l)
13 Vapor Intrusion Modeling Considerations Considered commercial setting Estimated indoor air PCE concentrations using Johnson & Ettinger model from groundwater and soil gas data with site-specific soil and building parameters
14 Results of VI Modeling from Groundwater For J&E model, used measured building width, length, and volume Used ASTM default air exchange rate, foundation thickness, fraction open area in building foundation/walls Used 90th percentile of measured intrinsic permeability [8.6x10-12 m 2 ] Estimated indoor air PCE concentration: µg/l over source area µg/l over non-source area
15 Results of VI Modeling from Soil Gas Used same parameters as groundwater-source model Estimated indoor air PCE concentration: µg/l over source area µg/l over non-source area
16 esults of VI Modeling from Crack Flux Data Applied mean flux from 13 ft of sampled cracks to 425 ft of un-sampled cracks Assumes cracks are only significant route of vapor entry (BIG assumption!) Applied box mixing model with building volume and air exchange rate Estimated indoor PCE concentration µg/l
17 Results Comparison (PCE in µg/l) Data Source Media (95% UCL) Modeled Indoor Air Measured Indoor Air NS-GW 1, S-GW 48, NS-SGd S-SGd 25, CK-IA 6.95 (avg. flux in µg/min/ft) Bold indicates higher value
18 Attenuation Factor Comparison Data Estimated Indoor Air Measured Indoor Air Draft OSWER Default NS-GW 3.7x x x10-3 S-GW 3.8x x x10-3 NS-SGd 3.3x x x10-2 S-SGd 3.3x x x10-2 Crack flux data not useful for estimating attenuation factor
19 Observations EPA Attenuation Factors 100 to 1000 times more conservative than empirical data Observed measured attenuation factors ranged from 1x10-5 to 1x10-6 Johnson & Ettinger model with sitespecific parameters reasonable predictor of indoor air concentrations and attenuation factors
20 Observations, Continued Flux chamber data was least accurate predictor of indoor air concentrations Sealing floor cracks and seams did not significantly reduce indoor air concentrations or apparent attenuation factor HVAC on or off did not significantly reduce indoor air concentrations or apparent attenuation factor Installation and operation of SVE system reduced measured indoor air concentrations to below reporting limits
21 Conclusions Reduction following SVE confirms origin of impact was from subsurface EPA generic attenuation factors are significantly more conservative than attenuation factors measured at this site Measured groundwater-indoor air or soil gasindoor air attenuation factors were within one order of magnitude of modeled attenuation factors
22 Conclusions For this well-characterized site, use of soil gas or groundwater data were appropriate to predict attenuation factors Site-specific subsurface and building conditions likely influenced differences between measured and generic attenuation factors
A Rational Approach to Vapor Intrusion Preferential Pathways
A Rational Approach to Vapor Intrusion Preferential Pathways PRESENTED BY: David J. Folkes, PE Geosyntec Consultants, Inc. AEHS West Coast Conference EPA Vapor Intrusion Technical Workshop March 22, 2016
More informationSOUTHWEST DIVISION Comparing Air Measurements and Modeling Results at a Residential Site Overlying a TCE Plume October 18, 2004
SOUTHWEST DIVISION Comparing Air Measurements and Modeling Results at a Residential Site Overlying a TCE Plume October 18, 2004 Presented by: Wilson Doctor, Remedial Project Manager Ronald J. Marnicio,
More informationCase Study of Modeled and Observed TCE Attenuation from Groundwater to Indoor Air. Christopher G. Lawless Johnson Wright, Inc.
Case Study of Modeled and Observed TCE Attenuation from Groundwater to Indoor Air Christopher G. Lawless Johnson Wright, Inc. October 18, 2004 Presentation Contents SITE BACKGROUND STUDY METHODS RESULTS
More informationCase Study of TCE Attenuation from Groundwater to Indoor Air and the Effects of Ventilation on Entry Routes
AEHS 14th Annual West Coast Conference, March 2004 EPA Vapor Intrusion Workshop Case Study of TCE Attenuation from Groundwater to Indoor Air and the Effects of Ventilation on Entry Routes Presented by:
More informationNJDEP VAPOR INTRUSION GUIDANCE Ground Water Screening Levels: Default Values and Site-Specific Specific Evaluation
NJDEP VAPOR INTRUSION GUIDANCE Ground Water Screening Levels: Default Values and Site-Specific Specific Evaluation Paul Sanders New Jersey Department of Environmental Protection paul.sanders@dep.state.nj.us
More informationPennsylvania s Land Recycling Program. Vapor Intrusion Technical Guidance
Pennsylvania s Land Recycling Program Vapor Intrusion Technical Guidance Appendix Y: Vapor Intrusion Modeling Guidance The Department recommends the use of EPA s Johnson & Ettinger model (U.S. EPA, 2004)
More informationNew Insights Into Exposure Through Preferential Pathway Vapor Migration
New Insights Into Exposure Through Preferential Pathway Vapor Migration Megan Hamilton Director of Vapor Intrusion and Risk Assessment Casey McFall, CHMM Vapor Intrusion Project Manager EnviroForensics
More information2. Appendix Y: Vapor Intrusion Modeling Requirements (Appendix to Statewide health standard VI guidance in the Technical Guidance Manual)
2. Appendix Y: Vapor Intrusion Modeling Requirements (Appendix to Statewide health standard VI guidance in the Technical Guidance Manual) DRAFT FOR DISCUSSION PURPOSES ONLY 19 June 2014 The Department
More informationOregon Guidance for Assessing and Remediating Vapor Intrusion in Buildings
Department of Environmental Quality Overview of Oregon Guidance for Assessing and Remediating Vapor Intrusion in Buildings Brownfields and Land Revitalization 2011 Conference Spokane, Washington May 13,
More informationMass Flux Characterization for Vapor Intrusion Assessment
Mass Flux Characterization for Vapor Intrusion Assessment ESTCP ER 201503 Helen Dawson, Ph.D. Geosyntec Consultants, Inc. April 13, 2016 Project Team Organization Individual Responsibility/Specialization
More informationTHE STATUS OF VAPOR INTRUSION ASSESSMENT AND MITIGATION IN OREGON
THE STATUS OF VAPOR INTRUSION ASSESSMENT AND MITIGATION IN OREGON By Don Hanson, Oregon DEQ SCRD May 2012 Oklahoma City OREGON PUBLISHED VI GUIDANCE IN MARCH 2010 Guidance for Assessing and Remediating
More informationEPA s Vapor Intrusion Database
EPA s Vapor Intrusion Database Characterization and Evaluation of Attenuation Factors for Chlorinated VOCs in Residences Helen Dawson, PhD Rich Kapuscinski, PhD March 20, 2012 1 Acknowledgements OSWER
More informationUnderstanding Building Materials Contribution to Indoor Air Quality
Understanding Building Materials Contribution to Indoor Air Quality Catherine E. Regan, P.E. ERM Boston, MA R. Joseph Fiacco, P.G. ERM Boston, MA 27 th Annual AEHS International Conference March 2017 Copyright
More informationExample Application of Long Term Stewardship for the Chlorinated Vapor Intrusion Pathway (and VOC sources)
Example Application of Long Term Stewardship for the Chlorinated Vapor Intrusion Pathway (and VOC sources) Megan Hamilton Director of Vapor Intrusion and Risk Assessment EnviroForensics March 24, 2015
More informationTRANSPORT PATHWAY EVIDENCE OF A SEWER VAPOR. Findings from Work Performed at the Indianapolis USEPA Research Duplex
EVIDENCE OF A SEWER VAPOR TRANSPORT PATHWAY Findings from Work Performed at the Indianapolis USEPA Research Duplex Midwestern States Environmental Consultants Association Spring Seminar Rob Uppencamp May
More informationNovember 8, 2016 International Petroleum Environmental Conference. Tim Nickels Pastor, Behling & Wheeler, LLC
November 8, 2016 International Petroleum Environmental Conference Tim Nickels Pastor, Behling & Wheeler, LLC Long term, non-voluntary constant inhalation exposure to toxic compounds Non-voluntarily inhale
More informationVapor Intrusion Attenuation Factors Based On Long Term Monitoring Data
Proceedings of the Annual International Conference on Soils, Sediments, Water and Energy Volume 12 Article 38 January 2010 Vapor Intrusion Attenuation Factors Based On Long Term Monitoring Data D.J. Folkes
More informationUse of Crawl Space Sampling Data and Other Lines of Evidence for Evaluating Vapor Intrusion
CALIFORNIA ENVIRONMENTAL PROTECTION AGENCY DEPARTMENT OF TOXIC SUBSTANCES CONTROL Use of Crawl Space Sampling Data and Other Lines of Evidence for Evaluating Vapor Intrusion C.Y. Jeng and William Bosan
More informationRisk-Based Clean-Up in Georgia Under the VRP Vapor Intrusion
Risk-Based Clean-Up in Georgia Under the VRP Vapor Intrusion Presented by: Genesis Project, Inc. in conjunction with Atlas Geo-Sampling Presentation Topics 1. Regulatory Implications 2. Vapor Intrusion
More informationEvaluation of Spatial and Temporal Variability in VOC Concentrations at Vapor Intrusion Investigation Sites.
Evaluation of Spatial and Temporal Variability in VOC Concentrations at Vapor Intrusion Investigation Sites. Proceeding of Air & Waste Management Association s Vapor Intrusion: Learning from the Challenges,
More informationBuilding Pressure Cycling for Vapor Intrusion Assessment
Building Pressure Cycling for Vapor Intrusion Assessment PRESENTED BY: Helen Dawson, Ph.D. William Wertz, Ph.D., Todd McAlary, Ph.D., Geosyntec Consultants, Inc., Dan Carr, P.E., P.G., Sanborn Head & Associates,
More informationNavy VI Web Tool: A Systematic Approach for Assessing Strength of Evidence
Navy VI Web Tool: A Systematic Approach for Assessing Strength of Evidence EPA Workshop 2012 Donna Caldwell / NAVFAC Atlantic Dr. Loren Lund / CH2M HILL Why Navy Developed VI Evaluation Tool 116 potential
More informationUnderstanding VI Screening Levels
A&WMA Specialty Conference URS Understanding VI Screening Levels Sept 29, 2010 VI Conference 1 Screening Values URS EPA and various states use screening values to decide which sites merit further investigation
More informationMark Kelley Battelle Environmental Technology and Restoration
!"# Mark Kelley Battelle Environmental Technology and Restoration A recently closed landfill at a military facility is the focus The landfill is a source of methane and VOCs in soil gas, as shown by lab
More informationTemperature and Vapor Intrusion Evaluation
Temperature and Vapor Intrusion Evaluation Evelina Morales, Ph.D. Oklahoma DEQ, Land Protection Division 405 702-5108 Evelina.morales@deq.state.ok.us Presented at: 18 th Annual AEHS Meeting and West Coast
More informationEvaluation of VI Data Relative to Separation Distance Screening Criteria A Michigan Case Study
GROUNDWATER & ENVIRONMENTAL SERVICES,INC. Evaluation of VI Data Relative to Separation Distance Screening Criteria A Michigan Case Study Chris Mulry, GES, Inc. March 19, 2014 Presentation Outline Study
More informationVapor Intrusion from Subsurface to Indoor Air:
Vapor Intrusion from Subsurface to Indoor Air: Biodegradable d Petroleum Vapors versus Recalcitrant t Chemicals Vapor Intrusion 2010: Air & Waste Management Association (A&WMA) Conference Chicago, IL.
More informationPetroleum Vapor Intrusion (PVI)- The Key Role of Natural Attenuation. Eric Suuberg School of Engineering, Brown University Providence, Rhode Island
Petroleum Vapor Intrusion (PVI)- The Key Role of Natural Attenuation Eric Suuberg School of Engineering, Brown University Providence, Rhode Island Vapor intrusion involves the migration of chemical vapors
More informationUse of Soil-Gas Data in Vapor Intrusion Decisions
Use of Soil-Gas Data in Vapor Intrusion Decisions 17 th AEHS West Coast Conference on Soils, Sediments, and Water San Diego, CA March 21-22, 2007 Presented by: Henry Schuver, US EPA OSW See: http://iavi.rti.org
More informationABSTRACT INTRODUCTION
Vadose Zone Profiling to Better Understand Vadose Zone Processes Related to Vapor Intrusion Paper # Daniel B. Carr, P.E., P.G., Laurent C. Levy, Ph.D., P.E., Allan H. Horneman, D.E.S. Sanborn, Head & Associates,
More informationLessons from Large Groundwater Plume Sites Redfield and Wall
Lessons from Large Groundwater Plume Sites Redfield and Wall Vapor Intrusion Workshop 18th Annual West Coast Conference on Soils, Sediments and Water, San Diego, California, March 13, 2008 Ian Hers, Golder
More informationAttenuation of Hydrocarbon Vapors from LNAPL Under Residential and Commercial/Industrial Buildings
Attenuation of Hydrocarbon Vapors from LNAPL Under Residential and Commercial/Industrial Buildings Presented at: Vapor Intrusion Attenuation Workshop 14 th Annual West Coast Conference on Soils, Sediments
More informationH&P Breakfast Seminar
Vapor Intrusion Risk Pathway: Regulatory Updates H&P Breakfast Seminar September 25, 2012 Blayne Hartman 858-204-6170 blayne@hartmaneg.com EPA Guidance Updates (Final Out in Nov 2012) EPA (OSWER & Superfund)
More informationFast-Track Vapor Intrusion Assessments Using HAPSITE Portable GC-MS
Fast-Track Vapor Intrusion Assessments Using HAPSITE Portable GC-MS Presented by: David Shea, P.E. Sanborn, Head & Associates, Inc. May 30, 2014 Building Trust. Engineering Success. Presentation Goal:
More informationQuantitative Decision Framework for Vapor Intrusion Evaluation in DoD Industrial Buildings - Based on an Empirical Database
Quantitative Decision Framework for Vapor Intrusion Evaluation in DoD Industrial Buildings - Based on an Empirical Database Christopher Lutes, Loren Lund, Keri Hallberg (CH2M HILL) Patricia Venable (NAVFAC
More informationVapor Intrusion Assessment. Kaitlyn S. Rhonehouse, P.E. Florida Brownfield Association 16 th Annual Conference, Brownfields in Motion
Vapor Intrusion Assessment Kaitlyn S. Rhonehouse, P.E. Florida Brownfield Association 16 th Annual Conference, Brownfields in Motion VI Assessment what to consider? Potential for VI Phase I ESA ASTM E1527
More informationVapor Intrusion in Massachusetts Gerard Martin
Vapor Intrusion in Massachusetts Gerard Martin Chief Compliance, Enforcement and Brownfields Redevelopment Section Bureau of Waste Site Cleanup, MassDEP Proposed MCP Amendments Relative to Vapor Intrusion
More informationEPA Vapor Intrusion Update
EPA Vapor Intrusion Update by Ben Bentkowski, P.G. Scientific Support Section, R4 Superfund Presented April 29, 2016 Southeastern States Vapor Intrusion Symposium March 2016 1 What is Vapor Intrusion?
More informationEPA S 2015 vapor intrusion guides What do they mean for your facility?
Environmental law alert Nixon peabody LLP July 22, 2015 EPA S 2015 vapor intrusion guides What do they mean for your facility? By J. Timothy Ramsey and Jean McCreary The United States Environmental Protection
More informationProposed Changes to EPA s Spreadsheet Version of Johnson & Ettinger Model (and some new spreadsheet tools)
Proposed Changes to EPA s Spreadsheet Version of Johnson & Ettinger Model (and some new spreadsheet tools) Workshop Integrating Observed & Modeled Vapor Attenuation The 15th Annual AEHS West Coast Conference,
More informationNEWMOA/ Brown SRP Vapor Intrusion Workshop. September 26 and 26, η T. q = k ρ g. D ig. = d i air η g. dφ = gz + 10 / 3
Overview of Vapor Intrusion and Characterization of Exposure Risks Presented by Kelly G. Pennell, PhD, PE Assistant Professor Civil Engineering - University of Kentucky J T = q C Dig C D ig = d i air η
More informationSpecialty Seminar on Technical Updates to USEPA & ITRC Vapor Intrusion Guidance Data from Vapor Intrusion Investigations
Specialty Seminar on Technical Updates to USEPA & ITRC Vapor Intrusion Guidance Data from Vapor Intrusion Investigations The 18th Annual AEHS Meeting & West Coast Conference on Soils, Sediments, and Water
More informationBackground. NCP Early or Interim Actions 5/3/2017. Current Ohio EPA Response Action Levels and Time Frames for TCE at Vapor Intrusion Sites in Ohio
Current Ohio EPA Response Action Levels and Time Frames for TCE at Vapor Intrusion Sites in Ohio Carrie Rasik, Risk Assessor Ohio EPA MSECA, May 2017 Background U.S. EPA IRIS 2011 TCE Toxicity Update -
More informationExpediting VI Assessments & Remedies with High Res Data
500 450 400 350 300 250 200 150 100 50 0 0 10 20 30 40 50 60 70 80 TCE Expediting VI Assessments & Remedies with High Res Data TCE Blayne Hartman Ph.D. AEHS San Diego March 2018 20 18 16 14 12 10 8 6 4
More informationA REVIEW OF VAPOR INTRUSION GUIDANCE BY STATE
A REVIEW OF VAPOR INTRUSION GUIDANCE BY STATE Laurent C. Levy, Ph.D., P.E., Gradient Senior Project Manager Webinar Tuesday, August 14, 2012 Northeast Waste Management Officials' Association Gradient Gradientcorp.com
More informationPart 3 Fundamentals. Most Common VI Bloopers. Handy Unit Conversions:
Part 3 Fundamentals Units Contaminant Partitioning Vapor Migration Bioattenuation Site Conceptual Model Attenuation (alpha) Factors Risk/Screening Levels Most Common VI Bloopers Unit Confusion Assuming
More informationAssessing Variability in Petroleum Vapor Intrusion
Assessing Variability in Petroleum Vapor Intrusion Jim Weaver United States Environmental Protection Agency Office of Research and Development National Risk Management Research Laboratory Ground Water
More informationVapor Intrusion - Site Characterization and Screening. NEWMOA Workshop on Vapor Intrusion Chelmsford, MA April 12, 2006
Vapor Intrusion - Site Characterization and Screening NEWMOA Workshop on Vapor Intrusion Chelmsford, MA April 12, 2006 David J. Folkes P.E. 1 What is Vapor Intrusion?! Compounds of Concern " Volatile Organics
More informationStylistic Modeling of Vadose Zone Transport Insight into Vapor Intrusion Processes
March 15, 2011 Workshop, Addressing Regulatory Challenges In Vapor Intrusion, A State of the Science Update Stylistic Modeling of Vadose Zone Transport Insight into Vapor Intrusion Processes Daniel B.
More informationThe Future of Vapor Intrusion (VI)
The Future of Vapor Intrusion (VI) Monitoring and Analysis National Environmental Measurement Conference Bellevue, WA Aug. 15, 2011 Presented by: Henry Schuver, DrPH USEPA Office of Resource Conservation
More informationUpdate - Vapor Intrusion and Mitigation in Florida
Florida Brownfields Conference Update - Vapor Intrusion and Mitigation in Florida Gordon L. Walters Jr., P.E., M.B.A. October 30, 2012 What is Vapor Intrusion? Vapor Intrusion is the migration of volatile
More informationSouthern Cleaners & Laundry Jacksonville, North Carolina. CASE STUDY Vapor Intrusion Pathway: Evaluation and Risk Assessment
Southern Cleaners & Laundry Jacksonville, North Carolina CASE STUDY Vapor Intrusion Pathway: Evaluation and Risk Assessment October 2006 Presented By: Delonda Alexander North Carolina Dry-Cleaning Solvent
More informationVadose Zone Profiling to Better Understand Processes
Vapor Intrusion 2010 Sept. 29-30 Chicago Vadose Zone Profiling to Better Understand Processes Related to Vapor Intrusion Daniel B. Carr, P.E., P.G., Laurent C. Levy, Ph.D., P.E., Allan H. Horneman, D.E.S.
More information2005 Review of Canada-Wide Standards for Petroleum Hydrocarbons in Soil: Report of the Model Parameter Advisory (MPA) Sub Group
2005 Review of Canada-Wide Standards for Petroleum Hydrocarbons in Soil: Report of the Model Parameter Advisory (MPA) Sub Group March 2006 1 Acknowledgement We would like to thank all the members of the
More informationU.S. EPA s Vapor Intrusion Database: Preliminary Evaluation of Attenuation Factors
March 4, 2008 U.S. EPA s Vapor Intrusion Database: Preliminary Evaluation of Attenuation Factors Office of Solid Waste U.S. Environmental Protection Agency Washington, DC 20460 [This page intentionally
More informationPneumatic Testing, Mathematical. and Optimize the Performance and. Slab Depressurization Systems
Pneumatic Testing, Mathematical Modeling and Flux Monitoring to Assess and Optimize the Performance and Establish Termination Criteria for Sub- Slab Depressurization Systems Todd McAlary, David Bertrand,
More informationThe IAQ/Mold Assessment Getting it Right! Controlling Your Risk
EBC Seminar The IAQ/Mold Assessment Getting it Right! Controlling Your Risk Next Speaker Rosemary McCafferty Haley & Aldrich, Inc. Outline Vapor Intrusion Overview Vapor Intrusion Sampling Vapor Intrusion
More informationAsk The Expert Webinar Series Vapor Intrusion Assessments Part Two: Improving Data Quality Using Today s Best Practices for Sample Analysis
Ask The Expert Webinar Series Vapor Intrusion Assessments Part Two: Improving Data Quality Using Today s Best Practices for Sample Analysis Taryn McKnight Client Relations Manager The migration of volatile
More informationConceptual Site Model for Mercury Impacted Soil and Groundwater as a Tool for Effective Remediation
Conceptual Site Model for Mercury Impacted Soil and Groundwater as a Tool for Effective Remediation David J. Russell, P.E., BCEE, LSRP, Christopher Wong, P.G. & Anne Lewis-Russ, PhD AECOM Former New Jersey
More informationEmpirical Data to Evaluate the Occurrence of Sub-slab O 2 Depletion Shadow at Petroleum Hydrocarbon- Impacted Vapor Intrusion Sites
Empirical Data to Evaluate the Occurrence of Sub-slab O 2 Depletion Shadow at Petroleum Hydrocarbon- Impacted Vapor Intrusion Sites Ravi Kolhatkar, Emma Hong Luo & Tom Peargin Chevron Energy Technology
More informationEffect of Building-Source Separation and Preferential Pathways for Steady State Vapor Intrusion Simulations in Non-Homogenous Geologies
Submitted to Environmental Science & Technology Effect of Building-Source Separation and Preferential Pathways for Steady State Vapor Intrusion Simulations in Non-Homogenous Geologies Journal: Environmental
More informationA Review for the US Navy of Best Practices, Knowledge and Data Gaps, and Research Directions for Vapor Intrusion
A Review for the US Navy of Best Practices, Knowledge and Data Gaps, and Research Directions for Vapor Intrusion Todd McAlary and Robert Ettinger, Geosyntec Consultants Paul Johnson, Arizona State University
More informationWhat is the Evidence for Long Term Stewardship (LTS)
What is the Evidence for Long Term Stewardship (LTS) (vs. Stopping All Monitoring (SAM)) for the Vapor Intrusion Pathway?* For EnviroForensics & Barnes and Thornburg Webinar Nov. 19, 2014 by Henry J. Schuver,
More informationDetailed discussion of the Petroleum Vapor Database is provided in Davis R.V., 2009, LUSTLine #61 and EPA Jan
1 The objective of studying and evaluating the behavior of subsurface petroleum vapors is to understand why, with so many LUST sites worldwide, the PVI pathway is rarely complete. Advancing our knowledge
More informationTCE Fate and Transport, as Related to Vapor Intrusion
TCE Fate and Transport, as Related to Vapor Intrusion Eric Suuberg School of Engineering, Brown University Providence, Rhode Island NEWMOA/Brown SRP Workshop on TCE Vapor Intrusion: State of the Science,
More informationTCE Fate and Transport, as Related to Vapor Intrusion
TCE Fate and Transport, as Related to Vapor Intrusion Eric Suuberg School of Engineering, Brown University Providence, Rhode Island NEWMOA/Brown SRP Workshop on TCE Vapor Intrusion: State of the Science,
More informationPractical Aspects of VI Assessment for TCE. Acknowledgments and special thanks to:
Practical Aspects of VI Assessment for TCE Presented by: David Shea, P.E. Sanborn, Head & Associates, Inc. Concord, NH Building Trust. Engineering Success. Acknowledgments and special thanks to: Helen
More informationVapor Intrusion Mitigation Methods & Strategies
Vapor Intrusion Mitigation Methods & Strategies NEWMOA Workshop on Vapor Intrusion Chelmsford, MA April 12, 2006 David J. Folkes P.E. Topics Overview of Mitigation Approaches Commercial Buildings Sub-Slab
More informationUpdated Approaches for Monitoring Strategies/Options for Long Term Protection from CVI (under RCRA Corrective Action)
USEPA Work Shop, AEHS 27 th Annual International Conference on Soil, Water, Energy and Air March 21, 2017, San Diego, CA Updated Approaches for Monitoring Strategies/Options for Long Term Protection from
More informationA Comparison of BioVapor and Johnson and Ettinger Model Predictions to Field Data for Multiple Sites
Compare to J&E? O 2 for Mitigation? A Comparison of BioVapor and Johnson and Ettinger Model Predictions to Field Data for Multiple Sites AEHS 25th Annual International Conference on Soil, Water, Energy
More information7.0 EVALUATION OF REMEDIAL ALTERNATIVES
7.0 EVALUATION OF REMEDIAL ALTERNATIVES This section provides a description of the developed remedial alternatives based on viable remedial technologies and process options, as identified in Section 4.0,
More informationNew Models to Support Vapor Intrusion Mitigation Design
New Models to Support Vapor Intrusion Mitigation Design USEPA Work Shop, AEHS 27th Annual International Conference on Soil, Water, Energy and Air March 23-26, 2015, San Diego, CA Dr. Ian Hers, Dr. Parisa
More informationDesign of Below Sub-slab Vapour Management System for a Commercial Building
Design of Below Sub-slab Vapour Management System for a Commercial Building Soil Contamination Chemical vapor (residual or mobile NAPL) Migration Soil Contamination Indoor Air Chemical Vapour Transport
More informationBest management practices for vapor investigation and building mitigation decisions
www.pca.state.mn.us Best management practices for vapor investigation and building mitigation decisions Purpose This best management practices (BMPs) document describes the processes used to conduct vapor
More information23 February 2017 Reference No L-Rev1-8500
23 February 2017 Reference No. David Williams Contaminated Sites Approved Professional Society (CSAP) 744 W. Hastings Street Vancouver, BC V6C 1A5 UPDATED REVIEW OF LATERAL VAPOUR ATTENUATION FACTORS FOR
More informationUpdated J&E Model VIAModel.xls
Updated J&E Model VIAModel.xls Helen Dawson, Ph.D. USEPA Region 8 AEHS Spring 2006 What s Different? Combines screening and advanced versions of the groundwater and soil gas spreadsheets. Provides default
More informationVapor Intrusion Mitigation. ITRC Shaping the Future of Regulatory Acceptance
Vapor Intrusion Mitigation NEWMOA Workshop April/May 2015 Presented by Robin Mongeon, P.E. NH Department of Environmental Services ITRC Shaping the Future of Regulatory Acceptance Host organization Network
More informationAn RT Regulatory Program Summary
An RT Regulatory Program Summary NJDEP ISSUES DRAFT VAPOR INTRUSION GUIDANCE In mid-june, the New Jersey Department of Environmental Protection issued draft Vapor Intrusion Guidance, which is very important,
More informationPost-Remedy Vapor Intrusion Evaluation for the Laboratory for Energy-Related Health Research (LEHR) Superfund Site
August 20 23, 2018 Grand Junction, Colorado 2018 Long-Term Stewardship Conference Post-Remedy Vapor Intrusion Evaluation for the Laboratory for Energy-Related Health Research (LEHR) Superfund Site Mary
More informationVapor Intrusion Panel Discussion. SCRD Fall 2009 Meeting Terry Evanson Wisconsin DNR,
Vapor Intrusion Panel Discussion SCRD Fall 2009 Meeting Terry Evanson Wisconsin DNR, Theresa.Evanson@wisconsin.gov 608-266-0941 VI Issues at WI Dry Cleaner Sites Assessment of the vapor pathway at operating
More informationLessons from Petroleum Hydrocarbon and Chlorinated Solvent Sites Extensively Monitored for Vapor Intrusion
Lessons from Petroleum Hydrocarbon and Chlorinated Solvent Sites Extensively Monitored for Vapor Intrusion By Todd McAlary Geosyntec Consultants, Inc. EPA Workshop on Vapor Intrusion San Diego, CA March
More informationModeling the Vapor Intrusion Pathway: Revisions to the MCP GW-2 Groundwater Standards
Modeling the Vapor Intrusion Pathway: Revisions to the MCP GW-2 Groundwater Standards Environmental Protection One Winter Street, Boston, MA 02108 http://mass.gov/dep Paul W. Locke Bureau Waste Site Cleanup
More informationNJDEP Vapor Intrusion Guidance
NEW JERSEY VAPOR INTRUSION GUIDANCE Kenneth J. Kloo, Brownfield Administrator ASTSWMO 2008 Mid-Year Meeting Mobile, Alabama April 23 & 24, 2008 NJDEP Vapor Intrusion Guidance VAPOR INTRUSION GUIDANCE NEW
More informationVapor Intrusion into Large Buildings
USEPA Workshop: Recent Advances to VI Application and Implementation- A State of the Science Update The 22 nd Annual International Conference on Soil, Water, Energy, and Air San Diego California Vapor
More informationAn Integrated Model for Design of Soil Vapour Intrusion Mitigation Systems
An Integrated Model for Design of Soil Vapour Intrusion Mitigation Systems RemTech 2009 October 14-16, 2009 Banff, Alberta Soil Contamination Chemical vapor Migration Water Table Dr. Ian Hers Golder Vancouver;
More informationSteps in Conducting Structural Vapor Intrusion Potential Evaluations Under the Inactive Hazardous Sites Branch 13 February 2017
Steps in Conducting Structural Vapor Intrusion Potential Evaluations Under the 13 February 2017 This document provides the steps for conducting structural vapor intrusion evaluations under the Inactive
More informationATLANTIC RBCA (Risk-Based Corrective Action) For Petroleum Impacted Sites in Atlantic Canada
ATLANTIC RBCA (Risk-Based Corrective Action) Version 2.0 For Petroleum Impacted Sites in Atlantic Canada User Guidance Guidance for Soil Vapour and Indoor Air Monitoring Assessments July 2006 ERRATA (JULY
More informationRapid, Efficient Delineation From VI Potential of A Large Soil Gas Plume Using HAPSITE and Other Lines of Evidence
Rapid, Efficient Delineation From VI Potential of A Large Soil Gas Plume Using HAPSITE and Other Lines of Evidence Chris Lutes and Jennifer Knoepfle, Ph.D., P.G Site Setting Small town in Indiana; EPA
More informationIssue No. 7 Fall 2017 Is It a REC? Vapor Intrusion Confusion Back in 2008 the American Society for Testing and Materials (now ASTM International) released its guidance for what was then described as an
More informationProposed MCP Amendments
Gerard Martin, Chief Compliance, Enforcement and Brownfields Redevelopment Section MassDEP, Bureau of Waste Site Cleanup Southeast Regional Office September 27, 2013 Proposed MCP Amendments Process Improvements:
More informationVapor Intrusion Pathway Screening for Soil Excavation Remedies
Vapor Intrusion Pathway Screening for Soil Excavation Remedies Helen Dawson, Ph.D. Geosyntec Consultants Chris Lutes, CH2MHill Dan Carr, Sanborn Head & Associates Todd McAlary, Geosyntec Consultants Robert
More informationAugust Vapor Intrusion Guidance FAQs
August 2017 2017 Vapor Intrusion Guidance FAQs Topics: A. General B. Effect of New Guidance on In-Process Sites C. Future Use of Site D. Modeling E. Off-Site Properties F. Preferential Pathways G. Proximity
More informationArmen Cleaners Indoor Air Quality Investigation. Jon Gulch, OSC U.S. EPA, Region V, ERB
Armen Cleaners Indoor Air Quality Investigation Jon Gulch, OSC U.S. EPA, Region V, ERB Purpose of Investigation Assist MDCH in Evaluating Indoor Air Quality of Residences for the Presence of VOCs Associated
More informationVolatilization to Indoor Air Pathway (VIAP) and Vapor Intrusion (VI)
Volatilization to Indoor Air Pathway (VIAP) and Vapor Intrusion (VI) What it is and What s up Matthew Williams Vapor Intrusion Specialist Remediation and Redevelopment Division Phone: (517)284-5171 Email:
More informationCalifornia Low-Threat Closure Policy
California Low-Threat Closure Policy Catalina Espino Devine Lead Engineer Chevron Energy Technology Company CSAP Fall Professional Development Workshop Vancouver, BC November 23, 2016 Outline Overview
More informationAtlantic RBCA Guidance for Soil Vapour and Indoor Air Monitoring Assessments: Overview. December 7 th, 2006 Moncton, New Brunswick
Atlantic RBCA Guidance for Soil Vapour and Indoor Air Monitoring Assessments: Overview December 7 th, 2006 Moncton, New Brunswick Who? Outline Came up with this document Why? Soil vapour/indoor air sampling
More informationFACTS ABOUT: Vapor Intrusion
Maryland Department of the Environment FACTS ABOUT: Vapor Intrusion The Land Restoration Program (LRP) is charged with assessing and cleaning up uncontrolled hazardous waste sites throughout Maryland to
More informationVapor Intrusion Guidance and Policy Activities at U.S. EPA
Vapor Intrusion Guidance and Policy Activities at U.S. EPA Stiven Foster, Helen Dawson, Henry Schuver Photo image area measures 2 H x 6.93 W and can be masked by a collage strip of one, two or three images.
More informationMDEQ PROJECT UPDATE (2015 4Q PROGRESS REPORT)
MDEQ PROJECT UPDATE (215 4Q PROGRESS REPORT) RACER Lansing, Plants 2, 3 & 6 January 26, 216 Agenda Tracer Study / ISCO Pilot Test Results Lower 1,4-Dioxane Toe Investigation Fourth Quarter Groundwater
More information