Department of the Environment

Chemical Metals Industries, Inc. (CMI)

Vapor Intrusion Issues at the First Removal Action Site

Site #2Site #1

Agenda• Background

• Environmental Issues– Soil and Groundwater Contamination

– Vapor Intrusion

• Current Activities– MDE Actions

• Site #2 (2103 Annapolis Road)

• 2000 Block of Annapolis Road Homes)

– EPA Actions at Site #1 (2001 Annapolis Road)

Background• 1981 - First Removal

Action in US

• 1997 to Present – Post Removal Investigations– Soil Investigations /

Removal

– Groundwater Investigations

– Vapor Intrusion investigations

Site #2 – 2103 Annapolis Road

• Assessment Activities– Monitoring wells

installed to determine extent of subsurface contamination.

Remediation Activities• Site #2 - 2103 Annapolis Road

Injections of Chemical Oxidation Soil Vapor Extraction System

Remediation Activities (Cont’d)

Indoor Air Sampling

Vapor Intrusion Issues

2009 2011 2013

2015 2017 2019 2021 2023 2025 2027 2029 2031 2033 2035 2037 2039 2041 2043 2045 2047

OwnerOccupied

OwnerOccupied

OwnerOccupied

CMI Site #1Plume

CMI Site #2Plume

34 PCE3.7 TCE0.089J VC

Soil Gas:350,000 PCE20,000 TCE

800 VC

19 PCE1.7 TCE 31/30 PCE

Soil Gas:410 PCE71 TCE

Soil Gas:1000 PCE540 TCE

Soil Gas:4800 PCE4900 TCE

1.4 PCE0.38 TCE

3.0 PCE1.6 TCE

2.1 PCE3.6 TCE

2.2 PCE0.55TCE

9.0 PCE10.0 TCE0.068 VC

3.1 PCE2.8 TCE

CM

I Site

#1

3.4 PCE0.38 TCE0.11 VC

21 PCE1.8 TCE 16 PCE CMI Site

#2

Design Challenges for Vapor Intrusion Mitigation Systems

• 1920s Row Houses– Stacked Stone Foundation

– Dirt Floors And/Or Broken Concrete Floors

– Adequate Electrical Supply

Site #2

Site #1

Summary• Site #1

– MDE To Provide Assistance As Needed By EPA

• Site #2– MDE To Monitor Effectiveness Of Remedy

– Inspect Operation Of Vapor Mitigation Systems

For Further Information:

http://www.mde.state.md.us/Programs/LandPrograms/ERRP_Brownfields/ERRP_Superfund/index.asp

Controlled Hazardous Substance (CHS)Enforcement DivisionLand Restoration ProgramLand Management AdministrationMaryland Department of the Environment1800 Washington Boulevard, Suite 625Baltimore MD 21230(410) 537-3437