Soil　and　groundwater　contamination　can　lead　to　a　variety　of　impacts　and　risks　to　the　Communities.　Identifications　of　management　schemes　with　sound　environmental　and　socio-economic　efficiencies　is　desired.　In　fact,　before　any　decisions　regarding　site　remediation　actions　can　be　made,　three　major　questions　may　have　to　be　answered.　They　include　＂What　happened　underground,　and　what　will　happen　in　the　future　under　the　given　remediation　scenarios?,＂　＂Are　there　specific　risks　on　the　surrounding　community?＂　and　＂What　remediation　alternatives　are　suitable　for　the　site?＂　In　this　study,　an　integrated　subsurface　modeling　and　risk　assessment　method　for　petroleum-contaminated　site　management　is　proposed.　It　incorporates　multi-phase　flow　multi-component　transport　modeling　and　ELCR-based　human　health　risk　assessment　into　a　general　framework.　The　proposed　method　is　applied　to　a　case　study　within　a　western　Canada　context　for　identifying　effective　management　schemes　with　improved　environmental　and　socio-economic　efficiencies.　Given　conditions　at　the　study　site,　six　remediation　alternatives　based　on　combinations　of　several　technologies　are　recommended,　with　the　provision　of　analyses　for　equipment/manpower　requirements,　system　designs,　operations,　efficiencies,　and　costs.　These　alternatives　can　be　categorized　into　two　groups:　hybrid　ex　situ　and　in　situ　remediation　approaches,　and　integrated　in　situ　remediation　approaches.　This　study　is　a　new　attempt　that　integrates　issues　of　subsurface-contamination　simulation,　risk　assessment,　and　site　remediation　for　a　real-world　problem　within　a　general　research　framework.　The　research　outputs　are　directly　useful　for　the　industry　to　gain　insight　of　the　site　and　to　make　decisions　of　the　relevant　remediation　actions.