Embed Size (px)
Citation preview
EPA Vapor Intrusion Update
Former NAS Moffett FieldFormer NAS Moffett FieldRestoration Advisory Board Meeting
July 14, 2011
Alana LeeAlana LeeEPA Region 9
Estimated Extent of Regional TCE Shallow Groundwater Plume
Vapor Intrusion Study Area – Moffett Field Area and MEW Area
MEW Area – Sampled and UnsampledCommercial Buildings
432 Unsampled Buildings40 Sampled Buildings
Sampled Buildings – Moffett Field Area
NResidential Area
5
21 Commercial and 14 Residential Buildings
Currently Occupied Buildings to Be Sampled by MEWMoffett Field Area
12 Buildings
23 569
12 Buildings
23 56948 583C
146 583A146 583A503 583B543 596
554 944554 944
6
Currently Occupied Buildings to Be Sampled by NASA in Moffett Field Area
7 Buildings
N144 N245
7 Buildings
N212 N248
N213 T20GN213 T20G
N240
8
Sampling of Unsampled Buildings –MEW and Moffett Field Area
EPA October 8 Letter to Parties (MEW, Navy, NASA)( , y, )
Draft Site-wide Indoor Air Sampling and Analysis Work Plan –December 2010December 2010
Access, Building Walk-throughs, HVAC evaluations – Feb - June 20112011
Final Work Plan & EPA Conditional Approval – June - July 2011
Sampling – July - September 2011
10
Implementation of Vapor Intrusion Remedy - Process
• Sampling to Determine Response Action Tier Draft Work Plan by Sept 29, 2011
EPA St t t f W k W k R i t• EPA Statement of Work – Work RequirementsDiscussions with MEW, Navy, and NASA to conduct
the work – nearing completionthe work nearing completion
• Continued community involvement activitiesy
11
For More Information
www.epa.gov/region9/mewwww.epa.gov/region9/moffettfield
Alana LeeEPA Region 9 Superfund Division415.972.3141 [email protected]
