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22 November 2023 AdvancedGeo <br /> Project No. 23-7523 An Employee-Owned Company <br /> Page 7 of 7 � <br /> 7.0. REFERENCES <br /> • CaIEPA. 2011 a. Guidance for the Evaluation and Mitigation of Subsurface Vapor <br /> Intrusion to Indoor Air (Vapor Intrusion Guidance). October. <br /> • CaIEPA. 2011 b. Vapor Intrusion Mitigation Advisory. Final Revision 1. October. <br /> • CaIEPA. 2019a. Human and Ecological Risk Office (HERO) Human Health Risk <br /> Assessment (HHRA) Note Number 1, Issue: Recommended Department of Toxic <br /> Substances Control (DTSC) Default Exposure Factors for Use in Risk Assessment <br /> at California Hazardous Waste Sites and Permitted Facilities. April. <br /> • CaIEPA. 2019b. HERO HHRA Note Number 4, Issue: Guidance for Screening <br /> Level Human Health Risk Assessments. May. <br /> • CaIEPA. 2020. Draft Supplemental Guidance: Screening and Evaluating Vapor <br /> Intrusion. February. <br /> • CaIEPA. 2022. HERO HHRA Note Number 3, Issue: DTSC-Modified Screening <br /> Levels (DTSC-SLs). May. <br /> • CaIEPA. 2023. Final Draft Supplemental Guidance: Screening and Evaluating <br /> Vapor Intrusion. February. <br /> • USEPA. 2012. Evaluation and Characterization of Attenuation Factors for <br /> Chlorinated Volatile Organic Compounds and Residential Buildings. March. <br /> • USEPA. 2015. Technical Guide for Assessing and Mitigating the Vapor Intrusion <br /> Pathway from Subsurface Vapor Sources to Indoor Air. Office of Solid Waste and <br /> Emergency Response. June. <br /> • USEPA. 2022. Regional Screening Levels, Generic Tables. November. <br /> If you have any questions or require further information, please contact our office at <br /> (800) 511-9300. <br /> Sincerely, <br /> AdvancedGeo, Inc. <br /> Daniel J. Villanueva Robert D. Loeffler <br /> Senior Geologist Senior Geologist <br /> CA Professional Geologist No. 6709 <br /> Attachments <br />