Expedited Remediation of Chlorinated VOCs under the Georgia Brownfields Program
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Transcript of Expedited Remediation of Chlorinated VOCs under the Georgia Brownfields Program
Theresa Hui, Brown and Caldwell
2007 AWMA Annual Meeting & Technical Conference, St. Simons Island, GA
August 8, 2007
Expedited Remediation of Chlorinated VOCs under the
Georgia Brownfields Program
AWMA I August 8, 2007
Site Assessment History
Former electrical components manufacturing facility, operated since late 1960s
2004 ESAs identified VOCs exceeded NCs in soil and groundwater, SVOCs in SW detention basin
Suspected VOC sources of the release – former plating and former parts degreaser
HSRA release notification was submitted to EPD in May 2004, but the Site was not listed.
Manufacturing operations were moved out of the U.S.
AWMA I August 8, 2007
Site Delineation
AWMA I August 8, 2007
Brownfields Eligibility
Establishment of pre-existing release of regulated compounds.
Establishment of groundwater baseline for limitation of liability.
Release notification, but property not listed on HSI - Voluntary Brownfields Cleanup
Incentives for property transaction/ redevelopment by prospective buyer
Owner/seller initiated voluntary soil cleanup activities to attract prospective buyers
AWMA I August 8, 2007
Remediation Alternatives Analysis
Soil Treatment Options Excavation and Off-site Disposal Chemical Oxidation Soil Vapor Extraction Electrical Resistance Heating
Driver: Technologies must be quick and effective
Electrical Resistance Heating
(ERH)Excavation and
Off-site Disposal
Indoors: Outdoors:
AWMA I August 8, 2007
ERH Contractor Selection
Guaranteed Fixed Price Remediation Remediation
Objectives Schedule
Electrical and Water Consumption/Costs
Technical Approach 3-phase vs. 6-phase Hydraulic control
AWMA I August 8, 2007
Excavation Activities
Stormwater Detention Basin
Drainage Swale Awning Area
Remediation Objectives
Metals - Type 1 Soil Criteria
SVOCs - NCs VOCs - NCs
AWMA I August 8, 2007
Confirmation Sampling
Clean-up goals met for detention basin, drainage swale, and awning area
ERH in last month of operation, 95% complete
ERH clean-up time: 8-9 months
AWMA I August 8, 2007
Post Clean-Up and Buyer Liability
Typically, the buyer is responsible for site investigation, soil cleanup, and the CSR/CAP.
Owner has assumed costs for all of the above to attract prospective buyers.
CSR - Soil RRSs have been met. CAP – Groundwater clean-up liability
remains with the Seller, will let VOCs in GW attenuate
CSR/CAP will be given to buyer for submittal to EPD.
AWMA I August 8, 2007
Conclusions
Brownfields clean-up encourages an expedited approach to address site environmental issues.
Seller can provide additional prospective buyer incentives by doing up-front work.
Brownfields approach promotes communication between stakeholders to achieve a common goal.