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Additional evaluation should be carried out at sites where the basic conceptualsite model indicates that the presence of contaminated soils may pose otherenvironmental concerns or where potential impacts to groundwater, surface wateror sediment are identified. It is beyond the scope of this document to presentguidance on the proper evaluation of these additional concerns. However, usefulreferences are provided in Figure 4-1. Additional risk assessment guidanceshould be consulted as needed.January 20054-2CHHSLS
5 ReferencesBradford, G. R., et. al, 1996, Background Concentrations of Trace and MajorElements in California Soils: University of California (Riverside),Division of Agriculture and Natural Resources, March 1996.Cal/EPA, 1994a, CalTOX, A Multimedia Total Exposure Model For Hazardous-Waste Sites: California Environmental Protection Agency, Department ofToxics Substances Control, Version 1.5 (and updates),www.dtsc.ca.gov/ScienceTechnology/index.html.Cal/EPA, 1994b, Preliminary Endangerment Assessment Guidance Manual:California Environmental Protection Agency, Department of ToxicsSubstances Control, January 1994.Cal/EPA, 1996a, Supplemental Guidance for Human Health Multimedia RiskAssessments of Hazardous Waste Sites and Permitted Facilities: CaliforniaEnvironmental Protection Agency, Department of Toxics SubstancesControl, August, 1996, www.dtsc.ca.gov/ScienceTechnology/ index.html.Cal/EPA, 1996b, Guidance for Ecological Risk Assessments at Hazardous WasteSites and Permitted Facilities (Parts A and B): California EnvironmentalProtection Agency, Department of Toxics Substances Control, July 4,1996, www.dtsc.ca.gov/ScienceTechnology/index.html.Cal/EPA, 1997, Selecting Inorganic Constituents as Chemicals of PotentialConcern at Risk Assessments at Hazardous Waste Sites and PermittedFacilities, Final Policy: California Environmental Protection Agency,Department of Toxics Substances Control, February 1997,http://www.dtsc.ca.gov/ScienceTechnology/ftp/backgrnd.pdf.Cal/EPA, 2002, Response Actions For Sites Where Future Uses May IncludeSensitive Uses: California Environmental Protection Agency, Departmentof Toxic Substances Control, Site Mitigation and Brownfields ReuseProgram, Management Memo EO-02-002-MM (July 0, 2002).Cal/EPA, 2004a, Guidance for Assessing Exposures and Health Risks at Existingand Proposed School Sites (Draft): California Environmental ProtectionAgency, Office of Environmental Health Hazard Assessment.Cal/EPA, 2004b, Guidance for the Evaluation and Mitigation of SubsurfaceVapor Intrusion to Indoor Air: California Environmental ProtectionAgency, Department of Toxics Substances Control.January 20055-1CHHSLS
Page 4: 4-1. SUGGESTED REFERENCES FOR EVALU
Page 8 and 9: document in general. The soil, soil
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Page 16 and 17: the lookup tables for sites with ot
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Page 50 and 51: Table 1. California Human Health Sc
Page 62 and 63: as a stand-alone tool for the evalu
Page 64 and 65: Similar ESLs are also provided for
Page 66 and 67: USEPA Region IX staff can be contac

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