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FORMLR AMERICAN FOREST PRODUCTS 1.0 Introduction <br /> Closure Summary Report July 2009 <br /> URS Project 17322736 Page 1-2 <br /> 10. Provide tabulated results of all sample analyses. (Table 4, Groundwater Analytical Results, and <br /> Appendix E, Soil Boring Locations,Analytical Results, and cross sections from 1994 Closure <br /> Request Report) <br /> 11. Discuss concentration and mass changes over time, and current concentrations of contaminants <br /> remaining in groundwater at the Site. (Section 3.4, Groundwater Conditions) <br /> 12. Provide isoconcentration contour maps of contaminants of concern to define the lateral and vertical <br /> extent of contaminants remaining in soil and groundwater. The maps should present an estimated <br /> "zero line" of contaminant concentrations both on-site and off-site. (Figure 8, 1,2-DCA <br /> Iso concentration Contours) <br /> 13. Provide a summary of the remedial methods used to clean up the site. (Section 2.3,Site <br /> Environmental Investigation History, and Section 4.1,Soil Corrective Actions) <br /> 14. Provide a discussion of whether background is unattainable using best available remediation methods. <br /> (Section 8.0,Rationale for Site Closure) <br /> 15. Provide a discussion or estimate of contaminant mass remaining in soil and groundwater versus <br /> contaminant mass removed or destroyed by soil excavation or remedial actions. (Section 4.2,Mass of <br /> Hydrocarbon in Soils Prior To And Following Excavation) <br /> 16. Provide assumptions,parameters, calculations and the model used in any risk assessment. (Section <br /> 7 0, RWQCB Tier I Environmental Risk Assessment) <br /> 17. Provide assumptions, parameters, calculations and the model used in fate and transport modeling. <br /> (Section 5.0,Modeling to Estimate Impact of Soil Contamination on Groundwater) <br /> 18. Present a rationale why the conditions remaining at the site will not adversely impact water quality, <br /> human health and safety, or other beneficial uses. Include a finding about present and future water <br /> use, and risks the site may still represent to human health and safety and water purity. (Section 8.0, <br /> Rationale for Site Closure) <br /> 19. Provide a list of technical reports submitted for site assessment, corrective action, confirmation <br /> sampling, and closure. (Section 9.0,References) <br /> 20. Provide any additional comments supporting the NFAA. (Section 8.0,Rationale for Site Closure) <br /> K Wpmce S.22%=(,',Amerism ForesnLlosure-Summary-Report-RevOl.doc <br />