1. Chemical Metals Industries, Inc. (CMI)
Vapor Intrusion Issues at the First Removal Action Site
Site #1
Site #2

2. Agenda Background Environmental Issues Current Activities
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)

3. Background 1981 - First Removal Action in US
1997 to Present – Post Removal Investigations
Soil Investigations / Removal
Groundwater Investigations
Vapor Intrusion investigations
1950s-1973: The properties at 2001 and 2103 Annapolis Road (“the Properties”) are used for commercial purposes including a gasoline service station and a precious metals refining business.
April 1973: Chemical Metals Industries (“CMI”) incorporates and some time after begins a metals recovery and copper sulfate manufacturing operation on the Properties.
October 19, 1981-December 18, 1981: EPA declares the Properties a Superfund site and performs an Emergency Removal Action along with a team of federal, State and local agencies. Various tanks, containers, at least 1500 deteriorated drums, and approximately 21,000 gallons and 114,000 pounds of hazardous waste are removed from the Properties. Underground storage tanks are removed or abandoned in-place and building decontamination activities are performed. Nine monitoring wells are installed on the Properties to evaluate groundwater and soil quality.
Soil and groundwater sampling results indicate significant contamination by various metals and volatile organic compounds (VOCs). Based on these findings, 2001 Annapolis Road property is covered with a foot of clayey fill material and outdoor areas of 2013 Annapolis Road property is covered with a layer of asphalt paving.

4. Site #2 – 2103 Annapolis Road Assessment Activities
Monitoring wells installed to determine extent of subsurface contamination.

5. Remediation Activities
Site # Annapolis Road
Soil Vapor Extraction System
Injections of Chemical Oxidation
Subslab depressurization system at 2103 Annapolis Road (CMI Site #2).
A sub-slab depressurization system basically consists of a fan or blower which draws air from the soil
beneath a building and discharges it to the atmosphere through a series of collection and discharge pipes. One or
more holes are cut through the building slab so that the extraction pipe(s) can be placed in contact with subgrade
materials, in order for soil gas to be drawn in from just beneath the slab. In

6. Remediation Activities (Cont’d)

7. Indoor Air Sampling

8. Vapor Intrusion Issues
2009
2011
2013
2015
2017
2019
2021
2023
2025
2027
2029
2031
2033
2035
2037
2039
2041
2043
2045
2047
Owner
Occupied
CMI Site #1
Plume
CMI Site #2
34 PCE
3.7 TCE
0.089J VC
Soil Gas:
350,000 PCE
20,000 TCE
800 VC
19 PCE
1.7 TCE
31/30 PCE
410 PCE
71 TCE
1000 PCE
540 TCE
4800 PCE
4900 TCE
1.4 PCE
0.38 TCE
3.0 PCE
1.6 TCE
2.1 PCE
3.6 TCE
2.2 PCE
0.55TCE
9.0 PCE
10.0 TCE
0.068 VC
3.1 PCE
2.8 TCE
3.4 PCE
0.11 VC
21 PCE
1.8 TCE
16 PCE
MDE collected soil, groundwater, soil gas and indoor air samples in a step-wise fashion
(1) Collected soil and groundwater samples; (2) collected soil gas and subslab soil gas samples around houses; (3) collected indoor air samples.
Based on sample results, MDE began planning remedial measures to address long-term risk for properties located at 2009, 2011, 2013, and 2047 Annapolis Road.
Sept/Oct 08 Update: For 2011, PCE and TCE was 86 ug/m3 and 9.03 ug/m3 in the basement and 27.9 ug/m3 and 5.97 ug/m3 on the first floor (living space), respectively;
For 2013, PCE was 23.6 ug/m3 in the basement and 6.17 ug/m3 and 12.5 ug/m3 on the first floor (front and back of first floor).
Site-specific conceptual model
Building construction & current condition
Modeling based on groundwater data
Johnson & Ettinger screening model
Sampling
Soil gas sampling
Indoor air sampling
Difficulties with Gaining Site Access:
Owner Occupied Versus Rental Properties
Frequent Changes In Property Ownership
Land-lord/Tenant Issues
Delays In Site Access

9. Design Challenges for Vapor Intrusion Mitigation Systems
1920s Row Houses
Stacked Stone Foundation
Dirt Floors And/Or Broken Concrete Floors
Adequate Electrical Supply
Site #1
MDE evaluated the properties affected by vapor intrusion and have installed a subslab depressurization system in one house. The other two houses will have basement ventilation systems installed. These systems consist of low suction, high volume fan that vents basement air to the outside while maintaining a
negative pressure in the basement space.
Site #2

10. Summary Site #1 Site #2 MDE To Monitor Effectiveness Of Remedy
MDE To Provide Assistance As Needed By EPA
Site #2
MDE To Monitor Effectiveness Of Remedy
Inspect Operation Of Vapor Mitigation Systems

11. For Further Information:
Controlled Hazardous Substance (CHS)
Enforcement Division
Land Restoration Program
Land Management Administration
Maryland Department of the Environment
1800 Washington Boulevard, Suite 625
Baltimore MD 21230
(410)