Presentation from 2007 to AWMA conference on vapour intrusion. Presentation covers the environmental forensics investigation of gases to identify the sources of the potential vapour intrusion. Techniques used both standard gas analysis as well as isotopic analysis of selected gases to identify the likely sources.
Landfill Compliance Monitoring: Achieving Long Term EfficiencyHydroTerra Pty Ltd
Richard Campbell presentation from the 2017 Institute of Public Works Engineering Australasia (IPWEA) leadership workshop. Richard covers the changing face of landfill environmental compliance reporitng through automated monitoring technology.
Low temperature nitrification_ningan_20MLDAmit Christian
Low Temperature Biological nitrification of Municipal Wastewater Using Highly porous Activated carbon impregnated Levapor Carriers. A Single step process which allows for lower Total Nitrogen Removal due to Simultaneous Nitrification and Denitrification (SNDN) at very low Winter temperature
Automatic carbon dioxide methane gas sensor based on the solubility of gases ...Sherry Huang
Biogas methane content is a relevant variable in anaerobic digestion processing where knowledge of process kinetics or an early indicator of digester failure is needed.
Presentation from 2007 to AWMA conference on vapour intrusion. Presentation covers the environmental forensics investigation of gases to identify the sources of the potential vapour intrusion. Techniques used both standard gas analysis as well as isotopic analysis of selected gases to identify the likely sources.
Landfill Compliance Monitoring: Achieving Long Term EfficiencyHydroTerra Pty Ltd
Richard Campbell presentation from the 2017 Institute of Public Works Engineering Australasia (IPWEA) leadership workshop. Richard covers the changing face of landfill environmental compliance reporitng through automated monitoring technology.
Low temperature nitrification_ningan_20MLDAmit Christian
Low Temperature Biological nitrification of Municipal Wastewater Using Highly porous Activated carbon impregnated Levapor Carriers. A Single step process which allows for lower Total Nitrogen Removal due to Simultaneous Nitrification and Denitrification (SNDN) at very low Winter temperature
Automatic carbon dioxide methane gas sensor based on the solubility of gases ...Sherry Huang
Biogas methane content is a relevant variable in anaerobic digestion processing where knowledge of process kinetics or an early indicator of digester failure is needed.
Vapor Intrusion Developments and Concerns in CaliforniaMeyers Nave
Vapor Intrusion is the migration of chemical vapors from the subsurface into commercial and residential buildings. Vapors can migrate through soil and into buildings through cracks in foundations, basements, crawl spaces and sewers. In February 2020, the Department of Toxic Substances Control, the San Francisco Bay Regional Water Quality Control Board, and the State Water Resources Control Board issued in draft form Supplemental Guidance: Screening and Evaluating Vapor Intrusion which recommends a consistent approach when screening buildings for subsurface vapor risk to occupants and describes a framework for deciding when cleanup and/or mitigation is needed.
The regulated community expected regulators to finalize the long-awaited Guidance, but that may be delayed now that recent studies performed by the DTSC have emerged showing that the Supplemental Vapor Intrusion Guidance may have gone too far in its estimation of risk. The delay may provide some relief to site owners due to concerns that the attenuation factors prescribed in the Guidance were too conservative and would have made it impossible to achieve closure for sites with soil vapor contamination.
Absorption of CO2 gas from CO
2/Air mixture into aqueous sodium hydroxide solution has been
achieved using packed column in pilot scale at constant temperature (T) of 25±1℃.The aim of the present work
was to improve the Absorption rate of this process, to find the optimal operation conditions, and to contribute to
the using of this process in the chemical industry. Absorption rate (RA) was measured by using different
operating parameters: gas mixture flow rate (G) of 360 -540 m3/h, carbon dioxide inlet concentration (CCO
2) of
0.1-0.5 vol. %, NaOH solution concentration (CNaOH) of 1-2 M, and liquid holdup in the column (VL) of 0.022-0.028 m3 according to experimental design. The measured RA was in the range of RA = 3.235 – 22.340 k-mol/h.
Computer program (Statgraphics/Experimental Design) was used to estimate the fitted linear model of RA in
terms of (G, CCO2, CNaOH, and VL), and the economic aspects of the process. R -squared of RA model was
91.7659 percent, while the standard error of the estimate shows the standard deviation of the residuals to be
1.7619. The linear model of RA was adequate, the operating parameters were significant except the liquid holdup
was not significant, and the interactions were negligible.
Indoor Air Quality Monitoring and Assessment for Companies to Understand the current indoor air quality problems in the industry.
This will help us to:
Taking necessary action to reduce poor indoor air quality
Planning for the future to reduce indoor air pollution
"Environmental Impact of Hydraulic Fracturing Treatment Performed on the Łebień LE-2H Well in Poland" - An indepth study performed by the Polish Geological Institute on the environmental impacts of hydraulic fracturing at a well site in Poland carried out in August 2011. The study finds that soil, air and water are not negatively impacted by fracking when it's done according to regulation.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Moffett Site 1, 22, 26, and 28 Five Year ReviewSteve Williams
Five Year Review for Installation Restoration Sites 1, 22, 26 and 28, Former Naval Air Station Moffett Field: Presentation to the Moffett Restoration Advisory Board Meeting, February 12, 2015, by Wilson Doctor, Navy Project Manager
Moffett RAB: EPA MEW Superfund Study Area UpdateSteve Williams
EPA Status Update
Middlefield-Ellis-Whisman (MEW) Superfund Study Area
Mountain View and Moffett Field, CA
Presentation to Former NAS Moffett Field Restoration Advisory Board
August 13, 2015
Alana Lee, EPA
EPA MEW Study Area TCE Source InvestigationSteve Williams
EPA TCE Source Investigation Findings
Middlefield-Ellis-Whisman (MEW)
Superfund Study Area
Mountain View and Moffett Field, CA
Former NAS Moffett Field
Restoration Advisory Board Meeting
February 12, 2015
Moffett RAB: EPA Update on Environmental Issues Management PlanSteve Williams
Update on Environmental Issues Management Plan (EIMP)
Presentation to the Former NAS Moffett Field RAB Meeting
August 13, 2015
By Alana Lee, EPA
Elizabeth Wells, Water Board
Vapor Intrusion Developments and Concerns in CaliforniaMeyers Nave
Vapor Intrusion is the migration of chemical vapors from the subsurface into commercial and residential buildings. Vapors can migrate through soil and into buildings through cracks in foundations, basements, crawl spaces and sewers. In February 2020, the Department of Toxic Substances Control, the San Francisco Bay Regional Water Quality Control Board, and the State Water Resources Control Board issued in draft form Supplemental Guidance: Screening and Evaluating Vapor Intrusion which recommends a consistent approach when screening buildings for subsurface vapor risk to occupants and describes a framework for deciding when cleanup and/or mitigation is needed.
The regulated community expected regulators to finalize the long-awaited Guidance, but that may be delayed now that recent studies performed by the DTSC have emerged showing that the Supplemental Vapor Intrusion Guidance may have gone too far in its estimation of risk. The delay may provide some relief to site owners due to concerns that the attenuation factors prescribed in the Guidance were too conservative and would have made it impossible to achieve closure for sites with soil vapor contamination.
Absorption of CO2 gas from CO
2/Air mixture into aqueous sodium hydroxide solution has been
achieved using packed column in pilot scale at constant temperature (T) of 25±1℃.The aim of the present work
was to improve the Absorption rate of this process, to find the optimal operation conditions, and to contribute to
the using of this process in the chemical industry. Absorption rate (RA) was measured by using different
operating parameters: gas mixture flow rate (G) of 360 -540 m3/h, carbon dioxide inlet concentration (CCO
2) of
0.1-0.5 vol. %, NaOH solution concentration (CNaOH) of 1-2 M, and liquid holdup in the column (VL) of 0.022-0.028 m3 according to experimental design. The measured RA was in the range of RA = 3.235 – 22.340 k-mol/h.
Computer program (Statgraphics/Experimental Design) was used to estimate the fitted linear model of RA in
terms of (G, CCO2, CNaOH, and VL), and the economic aspects of the process. R -squared of RA model was
91.7659 percent, while the standard error of the estimate shows the standard deviation of the residuals to be
1.7619. The linear model of RA was adequate, the operating parameters were significant except the liquid holdup
was not significant, and the interactions were negligible.
Indoor Air Quality Monitoring and Assessment for Companies to Understand the current indoor air quality problems in the industry.
This will help us to:
Taking necessary action to reduce poor indoor air quality
Planning for the future to reduce indoor air pollution
"Environmental Impact of Hydraulic Fracturing Treatment Performed on the Łebień LE-2H Well in Poland" - An indepth study performed by the Polish Geological Institute on the environmental impacts of hydraulic fracturing at a well site in Poland carried out in August 2011. The study finds that soil, air and water are not negatively impacted by fracking when it's done according to regulation.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Moffett Site 1, 22, 26, and 28 Five Year ReviewSteve Williams
Five Year Review for Installation Restoration Sites 1, 22, 26 and 28, Former Naval Air Station Moffett Field: Presentation to the Moffett Restoration Advisory Board Meeting, February 12, 2015, by Wilson Doctor, Navy Project Manager
Moffett RAB: EPA MEW Superfund Study Area UpdateSteve Williams
EPA Status Update
Middlefield-Ellis-Whisman (MEW) Superfund Study Area
Mountain View and Moffett Field, CA
Presentation to Former NAS Moffett Field Restoration Advisory Board
August 13, 2015
Alana Lee, EPA
EPA MEW Study Area TCE Source InvestigationSteve Williams
EPA TCE Source Investigation Findings
Middlefield-Ellis-Whisman (MEW)
Superfund Study Area
Mountain View and Moffett Field, CA
Former NAS Moffett Field
Restoration Advisory Board Meeting
February 12, 2015
Moffett RAB: EPA Update on Environmental Issues Management PlanSteve Williams
Update on Environmental Issues Management Plan (EIMP)
Presentation to the Former NAS Moffett Field RAB Meeting
August 13, 2015
By Alana Lee, EPA
Elizabeth Wells, Water Board
A Canadian study using the Engineers Canada protocol for assessing the effect of climate change. Key findings include: need for building code revision to adapt design parameters to address climate change and need to provide accommodation for cooling in existing buildings particularly having aging occupancy.
Some 6,500 km of CO2 pipelines has been operating for years, primarily in the United States. More recently, a number of these pipelines have been used for CO2 re-use or carbon capture and storage (CCS) operations in Europe and the Americas. Valuable experience and lessons learnt are available from these projects relevant for all phases of CO2 pipeline projects:, from early identification to execution and operation.
Based on a wide range of interviews and literature, Ecofys and SNC-Lavalin gathered information on 29 CO2 pipeline projects and then made the results accessible in a database. A reference manual was then written based on this information. This comprehensive document offers an overview of results and lessons learnt, serving as a guide to key issues on CO2 pipelines. The document relates to a number of examples in the database.
In this webinar, Frank Wiersma from Ecofys presented an overview of the study, discussing the process, lessons learnt, and findings relevant for the development, realisation and operation of CO2 pipelines.
This study was commissioned by the IEA GHG on behalf of the Global CCS Institute.
Stormwater Monitoring - Newington Solid Waste FacilityFairfax County
This presentation focuses on the development of a monitoring program for a large-scale sand filter at the Newington Solid Waste Facility. The program was designed to both determine the efficiency of this best management practice and provide insight on the maintenance needs of such a facility.
Orion Park Housing Area VOC Plume AssessmentSteve Williams
Presentation by the Army Environmental Command to the Moffett Field Restoration Advisory Board, November 20, 2014: Orion Park Housing Area Volatile Organic Compound Plume Assessment. Speaker: Matt Dayoc
EPA MEW Sampling Update, Moffett RAB, November 14, 2013Steve Williams
EPA update to the Moffett Restoration Advisory Board November 14, 2013, describing the investigation of TCE hotspots near Evandale Avenue, Leong Drive, and the Gateway Property (former County Vector Control Yard) adjacent to the MEW Superfund site in Mountain View, CA.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
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Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
1. ACTIVITY NAME
Vapor Intrusion Update
Former Naval Air Station Moffett Field
Restoration Advisory Board Meeting
February 13, 2014
2. Update Topics
• Background
• Past activities
–
–
–
–
May-June 2012 Indoor Air Sampling
Building 10 Utility Corridor Interim Action
May 2013 Vapor Pathway Investigation
May-June 2013 Soil Gas and Groundwater
Investigation
• Current sampling
– February 2014 Indoor Air Sampling
• Next steps
2
BRAC Program Management Office.
4. Indoor Air Cleanup Levels
Chemical of Concern
Indoor Air Cleanup
Level (mg/m3)
Trichloroethene (TCE)
5
Perchloroethylene (PCE)
2
cis-1,2-Dichloroethene
210
trans-1,2-Dichloroethene
210
Vinyl Chloride
2
1,1-Dichloroethane
6
1,1-Dichloroethene
700
Commercial
ROD Amendment for the Vapor Intrusion Pathway (EPA, 2010)
4
BRAC Program Management Office.
5. May-June 2012 Sampling
• Sampled indoor air in 23 commercial buildings to identify
areas with COCs that exceed ROD cleanup levels
• Visually inspected all buildings within the Navy area that
are occupied or may be occupied – Nov 2011 and Apr
2012
• Interviewed building managers about building use,
operations, work hours for occupants, etc.
• Obtained information on heating, ventilation and air
conditioning (HVAC) system operations and chemicals
used in the buildings
5
BRAC Program Management Office.
6. Air Sampling Scope
• Buildings with HVAC systems were sampled with HVAC on and
off
• HVAC-off samples were collected over Memorial Day weekend
• Buildings without HVACs were sampled with windows and doors
shut when possible
• Sampled work areas and
pathways (crawl spaces,
utility conduits, elevator
shafts, stairwells)
• Collected 29 ambient air
(outdoor/background)
samples
6
BRAC Program Management Office.
7. Results for Air Sampling
• Majority of buildings had detected VOCs above outdoor air
levels but below action levels.
• Only Buildings 10 and 126 had multiple samples that had
VOCs above action levels. A groundwater investigation was
conducted in 2012 and 2013 to investigate the VOC source
near Building 126 (Site 28).
• Buildings 3, 12, N210, and N239A (pathway locations) had
samples from a single location that had a VOC exceeding
project action levels. None of the samples collected from the
work areas in these buildings exceeded the ROD action levels.
7
BRAC Program Management Office.
8. Building 10
• Chlorinated solvent vapors were detected in Building 10 above
action levels in the Vapor Intrusion ROD Amendment.
• The solvent vapors result from solvents that are dissolved in
the shallow groundwater. The primary vapor intrusion
pathway is through the utility corridor connected to Building
10.
• A blower system has been
installed in the utility
corridor as an interim
measure to reduce
migration of vapors from the
corridor into Building 10.
8
BRAC Program Management Office.
9. Building 10 Response Actions & Air Monitoring
• Check work area air quality monthly using field measurement
instruments and quarterly using air canisters.
• Air monitoring results in February 2013 indicated TCE was still
near ROD cleanup levels near the corridor entrance in Building 10
but below cleanup levels in the work area. Therefore,
modifications were made to the system in May 2013:
– Installed a barrier wall at the
corridor entrance
– Installed a second blower in the
Building 10 floor trench that
connects to the corridor.
• Sampled Building 10 in June and
November 2013
9
BRAC Program Management Office.
10. Building 10 Response Actions & Air Monitoring
• Indoor air concentrations in the work areas were below action
levels (TCE 0.89 to 1.1 mg/m3).
• The blower system successfully reduced indoor air
concentrations.
• The blower system will remain in place as an interim measure
until long-term plans are implemented.
• The utility corridor is being evaluated to develop potential
closure/sealing options.
10
BRAC Program Management Office.
11. Vapor Pathway Investigation
• Follow-up indoor air sampling was conducted in May-June 2013 to
evaluate floor conduit vapor pathways in Buildings 2, 3, and 12 and a
TCE detection in Building N239A.
• In Buildings 2, 3 and 12, floor utility conduits
were sealed as an interim measure at pathway
locations where elevated TCE was detected in
May 2012 . Indoor air samples were collected at
these locations before sealing and again 1 to 2
weeks after.
• Sealing was effective for Building 2 which does
not have an HVAC.
• Sealing had limited effectiveness in Buildings 3
and 12, both of which have HVAC systems.
Building 12
Room 110
11
BRAC Program Management Office.
Building 3
Room 130
12. Vapor Pathway Investigation
• In Building N239A, two utility rooms (intermittent work areas)
were inspected for solvent sources and vapor pathways.
• Floor conduits were found in the
utility rooms.
12
BRAC Program Management Office.
13. Soil Gas and Groundwater Investigation
June 2013: Collected 56 soil gas and 20 groundwater samples
around the perimeter of buildings and along the Building 10
utility corridor to investigate shallow groundwater as a vapor
source and potential vapor pathways in soil.
13
BRAC Program Management Office.
14. Soil Gas and Groundwater Investigation
Soil Gas
• Installed soil gas probes above the water table
• Probes sampled after 48 hours
• Samples were analyzed using a mobile lab.
Groundwater
• Installed temporary groundwater wells 2
feet into groundwater.
• Samples were collected with a bailer and
not filtered.
14
BRAC Program Management Office.
15. Soil Gas Results
• TCE and related degradation products are primarily limited to the
vicinities of Buildings 3, 10, 15, 16, 45, 76, 126, 555, 567 and the utility
corridor from Building 10.
• Isolated areas exist in the vicinities of Buildings 2, 14, N210 and 239A.
(mg/m3)
15
BRAC Program Management Office.
16. Groundwater Results
•PCE only detected above MCL at Building 126.
•TCE above 500 mg/L near Buildings 10, 76, 126 and N210.
•Other COCs are high near Buildings 10, 29, 76, 126 and N210.
(mg/L)
16
BRAC Program Management Office.
17. February 2014 Air Sampling
• A 2nd series of indoor and outdoor air samples will be
collected during February 11 – 18, 2014.
• This sampling will provide data on potential seasonal
differences on the occurrence of vapor intrusion.
• The winter data from February 2014 will be compared to the
late-spring data from May-June 2012.
• Indoor air samples will only be collected from the basement
and 1st floor of the 23 buildings during the February 2014
sampling.
• As in 2012, samples collected in February 2014 will be
collected with both the HVAC on and off.
17
BRAC Program Management Office.
18. Vapor Intrusion Tier Response Evaluation
•Data collected in 2012, 2013 and 2014 will be evaluated
and used to rank the buildings according to the Vapor
Intrusion ROD Amendment.
•Response actions for each building will be developed.
– Engineering controls, institutional controls, monitoring
18
BRAC Program Management Office.
19. Future Activities
•The building tiering evaluation will be included in the
February 2014 sampling results report. The draft report is
scheduled for late June 2014.
•Continue with CERCLA process for Remedial Design and
Remedial Action
19
BRAC Program Management Office.
20. Air Sampling for Vapor Intrusion
QUESTIONS ?
20
BRAC Program Management Office.