EPA Groundwater Update

Highway 101 & Moffett Blvd Study Area

February 9, 2012

Former NAS Moffett Field RestorationAdvisory Board Meeting

Alana LeeEPA Project Manager

EPA 2005 Groundwater Sampling Locations

2005 – TCE Groundwater DataUpper A1 Aquifer Zone Lower A2 Aquifer Zone

Source of TCE contours: Tetra Tech EC. 2007. Groundwater Monitoring Well Installation and Sampling Report for Orion ParkHousing Area. September.

EPA 2011 Groundwater Sampling Locations

Other Work

Former Orion Park Supplemental SiteInvestigation

Property-specific investigations on Leong Drive

City of Mountain View – Gateway Property

Coordination with EPA and Water Board