EPA MEW Sampling Update, Moffett RAB, November 14, 2013

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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.

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EPA UpdatePotential Source and

Groundwater Investigation

Area South of Highway 101

Former NAS Moffett FieldRestoration Advisory Board Meeting

November 14, 2013

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Overview

• MEW Site Vapor

Intrusion Study area(as known in 2012)

EPA Area of Interest

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EPA 2005 GroundwaterInvestigation Area

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2007-2013Investigation Areas

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EPA Groundwater Investigation Area2005 & 2012

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UEUoC1

Slide 7

UEUoC1 Does this slide need 2 dots or just one? Perhaps I have the wrong dot.U.S. EPA User or Contractor, 11/14/2013

2012-2013 GroundwaterInvestigation

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High Priority Air Sampling AreaJan 2013

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Expanded Residential Indoor AirSampling Area – March 2013

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EPA Investigation –September 2013

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2013 EPA grab groundwater location2005-2012 grab groundwater location

Groundwater Investigation Area

TCE Hot Spot Area

Source type

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Surface Subsurface

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EPA Sample Locations

EPA Contact Information

Alana Lee

EPA Project Manager - Vapor Intrusion & Potential Source Investigation

415.972.3141

Lee.Alana@epa.gov

Penny Reddy

EPA Project Manager – Groundwater Cleanup

415.972.3108

Reddy.Penny@epa.gov

Alejandro Diaz

EPA Community InvolvementCoordinator

415.972.3242

Diaz.Alejandro@epa.gov

EPA Websites –For More Informationwww.epa.gov/region9/mewwww.epa.gov/region9/moffettfieldwww.epa.gov/oswer/vaporintrusion

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Additional Slides

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2012 - 2013 Sampling Results and Proposed Pilot Test Locations