Adrian, MI - PCE Remediation at Active Facility Brochure

ADR09 ShortV ProjEx 011111 acf.docx © 2010, TRS Group, Inc. All rights reserved. PCE Remediation at Active Manufacturing Facility Confidential Client - Adrian, MI Project Summary TRS Group, Inc. (TRS) provided a Standard Fixed Price Remediation (SFPR) source removal of perchloroethene (PCE) and PCE daughter products in soil and groundwater using Electrical Resistance Heating (ERH) at a confidential site located in Adrian, MI. The remediation is the first of its’ kind in the State of Michigan and occurredin conjunction with the remediation of a larger down gradient plume. Construction was performed during the winter months to meet the clients’ schedule. Seven electrodes were installed using common drilling techniques to target discrete contamination intervals to ensure efficient energy use and effective remediation. TRS Project Manager Mr. Chris Thomas TRS Project Engineer Mr. Dan Oberle Site Geology and Hydrology Clay to sand. Groundwater, 22-ft bgs Treatment Area Size, Volume, and Depth 1,610 ft2; 2,000 yd3; 4 to 36-ft bgs Beginning Maximum Contaminant Concentrations 2,700,000 ug/kg PCE Remedial Goal(s) Mass removal with PCE reduction of 99% Actual leanup Achieved: Average > 99.9% in soil and 99% in groundwater Period of Performance 176 days Contract Terms Standard Fixed Price Remediation Background The site parcel is approximately 4 acres in size and located in the southern edge of the property, adjacent to an active facility building. The entire remediation area is covered with asphalt. See Figure 1 for locations of the ERH remediation area. Site Characteristics & Design Parameters Site lithology in the remediation area consists of brown, silty to sandy clay from 0 to 15 feet bgs; brown, silty, fine-grained sand from 15 to 40 feet bgs; and gray silt from 40 to 50 feet bgs. A clay horizon is located at depths greater than 50 feet bgs. The depth to groundwater in the source area has varied from 23.9 feet bgs in March 2006 to 21.7 feet bgs in April 2009. Groundwater is typically found at 22 feet below grade surface (bgs). Figure 1. Site Plot Plan ADR09 ShortV ProjEx 011111 acf.docx © 2010, TRS Group, Inc. All rights reserved. PCE was the primary contaminant of concern in the remediation area but the project also involved remediation of TCE, cis 1,2- DCE and VC. The maximum concentration of PCE found in the source area soil was 2,700 mg/kg. A Permeable Reactive Barrier wall (PRB) was installed along the eastern property boundary in April-May 2004 in order to reduce the dissolved phase COCs migrating horizontally off the client property. System Construction TRS installed 7 electrodes with co-located vapor recovery points in the treatment area. Two temperature data locations with of six thermocouples each are used to track the treatment progress. The system installation included vapor recovery, electrode wiring, electrode water addition and communications installation. The TRS owned process equipment was placed and installed just prior to start-up. Operations ERH operations commenced in February 2010. The system was remotely operated 24-hours a day, averaging greater than 95% up time. The CVOC recovery rates ranged from 25 lb/day to as high as 200 lb/day during operations. Original mass-in –place calculations predicted that 2,200 lbs of PCE existed in the treatment area, but approximately 5 times this mass was removed by the ERH system during operations. Results Operations were completed in August 2010. The remedial goal at this site was to remove as much contaminant of concern (COC) mass during operations in soil and groundwater as possible with a target of >99% reduction in PCE concentrations. TRS removed 11,095 lbs of PCE from the soils and groundwater in 176 days of operations, achieving > 99% reduction in PCE concentrations in both soil and groundwater during that time frame (Figure 2). Figure 2: Total CVOCs in Soil TRS Contact Information Mr. David Fleming, (425) 396-4266, dfleming@thermalrs.com, www.thermalrs.com 05001,0001,5002,0002,5003,000 PCETCEcis-1,2-DCEVCConcentration (PPM)Pre ERH Post ERHNotables:11,000 # mass removed.All concentrationreductions were >99%Post ERH TCE, DCE, VC were non-dectectNotables:11,000 # mass removed.All concentrationreductions were >99%Post ERH TCE, DCE, VC were non-dectectNotables:11,000 # mass removed.All concentrationreductions were >99%Post ERH TCE, DCE, VC were non-dectectNotables:11,000 # mass removed.All concentrationreductions were >99%Post ERH TCE, DCE, VC were non-dectectNotables:11,000 # mass removed.All concentrationreductions were >99%Post ERH TCE, DCE, VC were non-dectectNotables:11,000 # mass removed.All concentrationreductions were >99%Post ERH TCE, DCE, VC were non-dectect