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Useful Links

http://dtsc.ca.gov/AssessingRisk/JE_Models.cfm 
California DTSC/HERD Johnson and Ettinger Models

http://www.swrcb.ca.gov/ust/lt_cls_plcy.shtml 
SWRCB DRAFT Low-Threat UST Closure Policy, July 14, 2011

http://www.api.org/ehs/groundwater/vapor/index.cfm
American Petroleum Institute Vapor Intrusion Guidance

http://www.itrcweb.org/teampublic_Vapor.asp
Interstate Technology & Regulatory Council VI Guidance

http://www.dtsc.ca.gov/AssessingRisk/caltox.cfm 
California DTSC CalTOX Model

http://www.calepa.ca.gov/brownfields/documents/2005/CHHSLsGuide.pdf 
Use of California Human Health Screening Levels (CHHSLs) in Evaluation of Contaminated Properties

http://www.epa.gov/region9/superfund/prg/ 
USEPA Region 9 Regional Screening Levels for Chemical Contaminants

http://www.dtsc.ca.gov/AssessingRisk/upload/Final_VIG_Oct_2011.pdf
DTSC Final Guidance for Evaluation and Mitigation of Vapor Intrusion, October 2011

http://www.epa.gov/Athens/learn2model/part-two/onsite/jne_background_reverse.html 
USEPA On-Line Tools For Site Assessment Calculations – Evaluation of Vapor Intrusion into Buildings form Contaminated Groundwater and Soil

http://www.dot.ca.gov/hq/esc/geotech/sr_logging_manual/page/logging_manual_2010.pdf 
Caltrans Soil and Rock Logging, Classification and Presentation Manual, 2010 Edition

http://www.dtsc.ca.gov/lawsregspolicies/policies/sitecleanup/upload/SMBR_adv_activesoilgasinvst.pdf
DTSC/LARWQCB Advisary on Active Soil Gas Investigations, January 2003