FAIR Meeting April 6, 2006

Groundwater Results – Fall 2003 Benzene ND <5 ug/L 5-99 ug/L ug/L >1,000 ug/L Product

Groundwater Results – Spring 2004 Benzene ND <5 ug/L 5-99 ug/L ug/L >1,000 ug/L Product

Groundwater Results – Fall 2004 Benzene ND <5 ug/L 5-99 ug/L ug/L >1,000 ug/L Product

Groundwater Results – Spring 2005 Benzene ND <5 ug/L 5-99 ug/L ug/L >1,000 ug/L Product

Groundwater Results – Fall 2005 Benzene ND <5 ug/L 5-99 ug/L ug/L >1,000 ug/L Product Shading indicates area potentially contaminated above DEC cleanup levels based on results of this sampling event.

Groundwater Results – Fall 2003 GRO ND <1.3 mg/L mg/L mg/L >100 mg/L Product

Groundwater Results – Spring 2004 GRO ND <1.3 mg/L mg/L mg/L >100 mg/L Product

Groundwater Results – Fall 2004 GRO ND <1.3 mg/L mg/L mg/L >100 mg/L Product

Groundwater Results – Spring 2005 GRO ND <1.3 mg/L mg/L mg/L >100 mg/L Product

GRO ND <1.3 mg/L mg/L mg/L >100 mg/L Product Groundwater Results – Fall 2005 Shading indicates area potentially contaminated above DEC cleanup levels based on results of this sampling event.

Groundwater Results – Fall 2003 DRO ND <1.5 mg/L mg/L mg/L >100 mg/L Product

Groundwater Results – Spring 2004 DRO ND <1.5 mg/L mg/L mg/L >100 mg/L Product

Groundwater Results – Fall 2004 DRO ND <1.5 mg/L mg/L mg/L >100 mg/L Product

Groundwater Results – Spring 2005 DRO ND <1.5 mg/L mg/L mg/L >100 mg/L Product

Groundwater Results – Fall 2005 DRO ND <1.5 mg/L mg/L mg/L >100 mg/L Product Shading indicates area potentially contaminated above DEC cleanup levels based on results of this sampling event.

RRO ND <1.1 mg/L mg/L mg/L >100 mg/L Product Groundwater Results – Spring 2004

RRO ND <1.1 mg/L mg/L mg/L >100 mg/L Product Groundwater Results – Fall 2004

RRO ND <1.1 mg/L mg/L mg/L >100 mg/L Product Groundwater Results – Spring 2005

RRO ND <1.1 mg/L mg/L mg/L >100 mg/L Product Groundwater Results – Fall 2005 Shading indicates area potentially contaminated above DEC cleanup levels based on results of this sampling event.

Coordinated Sampling Plan Coordinating survey techniques and frequency Coordinating survey techniques and frequency Possible change in date of spring sampling event Possible change in date of spring sampling event COCs – limited VOC list? COCs – limited VOC list?

Current and Future Land Use Plans Are commercial vs. residential cleanup levels appropriate for this area? Are commercial vs. residential cleanup levels appropriate for this area? Can groundwater use restrictions be enforced as an institutional control? Can groundwater use restrictions be enforced as an institutional control? Can future building construction be restricted if there is a vapor intrusion threat? Can future building construction be restricted if there is a vapor intrusion threat?

Site-specific CSMs

Chevron CSM

UNOCAL CSM

Van Gas CSM

Areawide CSM

Potentially Complete Pathways Vapor Intrusion Pathway Vapor Intrusion Pathway Outdoor Air Inhalation Pathway Outdoor Air Inhalation Pathway Incidental Ingestion and Dermal Contact with Soil (surface and subsurface) Incidental Ingestion and Dermal Contact with Soil (surface and subsurface) Is the soil data representative? Is the soil data representative? Groundwater (ingestion, inhalation of volatiles, and dermal contact pathways) Groundwater (ingestion, inhalation of volatiles, and dermal contact pathways) Is the well search complete? Is the well search complete? Protection of future receptors Protection of future receptors

Institutional Control Discussion Proposed Objectives Protect workers and visitors from contact with contaminated soil and inhalation of vapors. Prevent workers from using contaminated groundwater. Prevent residential use of these properties.

2007 Deliverables