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FAIR Meeting April 6, 2006

Comprehensive results of benzene, GRO, DRO, and RRO levels in groundwater from Fall 2004 to Fall 2005, with recommendations for Coordinated Sampling Plan, Land Use Plans, CSMs, Potential Pathways, and Institutional Controls. Discussion on protecting workers, visitors, and future land use. Deliverables for 2007.

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FAIR Meeting April 6, 2006

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  1. FAIR MeetingApril 6, 2006

  2. Benzene ND <5 ug/L 5-99 ug/L 100-999 ug/L >1,000 ug/L Product Groundwater Results – Fall 2004

  3. Benzene ND <5 ug/L 5-99 ug/L 100-999 ug/L >1,000 ug/L Product Groundwater Results – Spring 2005

  4. Benzene ND <5 ug/L 5-99 ug/L 100-999 ug/L >1,000 ug/L Product Groundwater Results – Fall 2005 Shading indicates area potentially contaminated above DEC cleanup levels based on results of this sampling event.

  5. GRO ND <1.3 mg/L 1.3-9 mg/L 10-99 mg/L >100 mg/L Product Groundwater Results – Fall 2004

  6. GRO ND <1.3 mg/L 1.3-9 mg/L 10-99 mg/L >100 mg/L Product Groundwater Results – Spring 2005

  7. GRO ND <1.3 mg/L 1.3-9 mg/L 10-99 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.

  8. DRO ND <1.5 mg/L 1.5-9 mg/L 10-99 mg/L >100 mg/L Product Groundwater Results – Fall 2004

  9. DRO ND <1.5 mg/L 1.5-9 mg/L 10-99 mg/L >100 mg/L Product Groundwater Results – Spring 2005

  10. DRO ND <1.5 mg/L 1.5-9 mg/L 10-99 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.

  11. RRO ND <1.1 mg/L 1.1-9 mg/L 10-99 mg/L >100 mg/L Product Groundwater Results – Fall 2004

  12. RRO ND <1.1 mg/L 1.1-9 mg/L 10-99 mg/L >100 mg/L Product Groundwater Results – Spring 2005

  13. RRO ND <1.1 mg/L 1.1-9 mg/L 10-99 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.

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

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

  16. Site-specific CSMs

  17. Chevron CSM

  18. UNOCAL CSM

  19. Van Gas CSM

  20. Areawide CSM

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

  22. 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.

  23. 2007 Deliverables

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