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.