Transforming an Oil Transforming an Oil Field Waste Disposal Field Waste Disposal Facility into 300 Facility into 300 Residential Units and an Residential Units and an Ecological Preserve- Ecological Preserve- Integration of Endangered Species Impacts Integration of Endangered Species Impacts with Remedial Processes and with Remedial Processes and Deal Structure to Align Interests Deal Structure to Align Interests Presented by Charles E. Robinson, P.E. of LFR Inc. Presented by Charles E. Robinson, P.E. of LFR Inc. GROWING COMMUNITIES ON KARST 2007 September 12, 2007 September 12, 2007
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Transforming an Oil Field Waste Disposal Facility into 300 Residential Units and an Ecological Preserve- Integration of Endangered Species Impacts with.
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Transforming an Oil Field Transforming an Oil Field Waste Disposal Facility into Waste Disposal Facility into
300 Residential Units and an 300 Residential Units and an Ecological Preserve-Ecological Preserve-
Integration of Endangered Species Impacts with Integration of Endangered Species Impacts with Remedial Processes andRemedial Processes and
Deal Structure to Align Interests Deal Structure to Align Interests
Presented by Charles E. Robinson, P.E. of LFR Inc.Presented by Charles E. Robinson, P.E. of LFR Inc.
GROWING COMMUNITIES ON KARST 2007September 12, 2007September 12, 2007
• Sold by original land holder in early Sold by original land holder in early 1990’s1990’s
• Early investigations found TPH, Ba, Early investigations found TPH, Ba, VOCs, PCBs- TPH dominated approachVOCs, PCBs- TPH dominated approach
HistoryHistory
• RWQCB approved RAP- 1996RWQCB approved RAP- 1996– On-site treatment and disposal of waste materialOn-site treatment and disposal of waste material– Clean-up levels to be finalizedClean-up levels to be finalized
• EIR PerformedEIR Performed– Remediation approved Remediation approved – Discovery of Ventura Marsh Milk VetchDiscovery of Ventura Marsh Milk Vetch– Complex Litigation and Negotiation Complex Litigation and Negotiation
• Califonia Coastal Commission- Coastal Califonia Coastal Commission- Coastal Development PlanDevelopment Plan– Development permitted to fund groundwater Development permitted to fund groundwater
remediationremediation
Ventura Marsh Milk-VetchVentura Marsh Milk-Vetch
• Last seen in 1983Last seen in 1983
• Listed as possibly extinct in 1993Listed as possibly extinct in 1993
• Found on the North Shore site in 1997Found on the North Shore site in 1997
• Listed as an endangered species in Listed as an endangered species in 20012001
• Scientific name:Scientific name: Astragalus Astragalus pycnostachyus var. lanosissimuspycnostachyus var. lanosissimus
Ventura Marsh Milk-VetchVentura Marsh Milk-Vetch
Ventura Marsh Milk Vetch
• Endangered Status required consideration through State Agencies and Courts through EIR
• Negotiated mitigation:– UCSB funded to establish seed bank– Off-site locations for Milk-Vetch Establishment– Mitigation property– Milk Vetch Preservation Area– Resource Protection Area
Residential and Preserve Residential and Preserve AreasAreas
Ventura Marsh Milk Vetch
•USFWS found at fault for Failure to Designate Critical Habitat– Lack of knowledge forced “assumed”
habitat designation– USFWS designated entire Site as critical
habitat to satisfy legal requirement
History ContinuedHistory Continued
• Project transferred to DTSC in 2004Project transferred to DTSC in 2004– Risk orientationRisk orientation– Residential land useResidential land use– RWQCB rejection of ‘96 RAPRWQCB rejection of ‘96 RAP
• RI/FS/RAP completed in late 2005RI/FS/RAP completed in late 2005– Consistent with RWQCB RAPConsistent with RWQCB RAP
•Almost all affected material left on-siteAlmost all affected material left on-site•Remedial objectives definedRemedial objectives defined•Shift away from TPH focus to other chemicals-Shift away from TPH focus to other chemicals-
PCBs, VOCs, Dioxins, and BariumPCBs, VOCs, Dioxins, and Barium
Site Site Characterization/RemediationCharacterization/Remediation
Remedial ActionRemedial Action• Soil Consolidation- low transport potential Soil Consolidation- low transport potential
for PCB, Dioxin, TPH, and metals- Title 27 for PCB, Dioxin, TPH, and metals- Title 27 (Landfill) exclusion for 5’ to groundwater(Landfill) exclusion for 5’ to groundwater
• VOC AreaVOC Area– High soils treated ex-situ SVEHigh soils treated ex-situ SVE– Low soils used as SCA capLow soils used as SCA cap– Groundwater treatmentGroundwater treatment– NAPL excavation NAPL excavation
• Resource Protection Area- restricted use- Resource Protection Area- restricted use- Similar Demands as Soil Consolidation Area Similar Demands as Soil Consolidation Area
Post Remediation Cross Post Remediation Cross SectionSection
History ContinuedHistory Continued
• EPA- Toxic Substance Control ActEPA- Toxic Substance Control Act– PCB responsibilityPCB responsibility– Initial approach to use pre-1978 exclusion Initial approach to use pre-1978 exclusion
rejected because of minor soil movementrejected because of minor soil movement– Risk based approach favoredRisk based approach favored– Review of DTSC/LFR RAPReview of DTSC/LFR RAP– Change in approach from self-Change in approach from self-
implemented to EPA discressionary implemented to EPA discressionary review mandated ESA Section 7 review mandated ESA Section 7 ConsultationConsultation
History ContinuedHistory Continued• EPA/US Fish and Wildlife Service- EPA/US Fish and Wildlife Service-
Endangered Species ActEndangered Species Act– Only wild Ventura Marsh Milk Vetch populationOnly wild Ventura Marsh Milk Vetch population– Prior designation of Critical Habitat named Prior designation of Critical Habitat named
Primary Constituent ElementsPrimary Constituent Elements– VM Milk-vetch requires 30” to water table and VM Milk-vetch requires 30” to water table and
Site water table is 30’ deepSite water table is 30’ deep– ““impermeable” sludge impermeable” sludge savedsaved Milk Vetch from Milk Vetch from
extinctionextinction– Evaluation of PCEs demonstrated no Evaluation of PCEs demonstrated no
degradation of critical habitatdegradation of critical habitat• Unique consideration of ESA and Unique consideration of ESA and
RemediationRemediation
Development Issues- Legal and Development Issues- Legal and Financial Tools EmployedFinancial Tools Employed
• Need to Provide Development Investors Need to Provide Development Investors CertaintyCertainty– Remedial UncertaintyRemedial Uncertainty– Geotechnical ConsiderationsGeotechnical Considerations