U.S. Environmental Protection Agency Region 3 William Dick Lagoons Superfund Site West Caln Twp,Chester county,PA EPA Enters New Phase of Soil Treatment May 2005 View of thermal desorption unit in operation pro"^ The low temperature Thermal Desorption Treatment phase of the soil cleanup at the site is near comple- tion. This phase has resulted in the successful treatment of 9,000 tons of shallow soil in Lagoons No. 1 and 2. An additional 10,000 tons of tarry/sludge material found in the lagoons has been shipped off- site to a hazardous waste disposal facility. Approximately 100 drums and 2,600 tons of associated de- bris were removed from an area near these two lagoons that was shipped off-site to a hazardous waste disposal facility. • A deep SVE/BIO zone that will treat the soil un- derlying the lagoons. OPERATION •Operation wili start in the fall and will continue for 18 months. •Sampling to evaluate the system effectiveness will take place 9 months into operation. •Another sampling will take place at the completion of the treatment to make sure it has been successful. If after either sampling event EPA concludes that cleanup goals will not be or have not been achieved, then the low temperature thermal treatment system will have to be brought back to the site to properly com- plete the soil cleanup. CONSTRUCTION The construction of the next phase of the soil cleanup plan has started and will end this fall when operation be- gins The next phase will include: • Two separate treat- ment technologies Soil Vapor Extraction (SVE and Bio- remediation (BIO) • Construction of these technologies will begin in mid-May 2005 • Construction of air injection and air ex- traction wells on site. • Construction of three SVE/BIO treatment cells on site. • Two shallow cells (one heat enhanced the other unheated) About the site... The William Dick Lagoons site, located in Chester County, Pennsylvania, is 4 and one half acres in size. It included three unlined lagoons which were used for waste disposal from the late 1950s to 1970. Chemical Lea man Tank Lines, Inc. (CLTL) cleaned petroleum products, latexes, and resins from its tank trailers, and dumped the final rinse water, and residual chemical product, into the lagoons. The lagoons, about two acres in total area, contained more than four million gallons of wastewater. Site soils are con- taminated and are moderately permeable, resulting in the contamination of groundwater. The lagoons were not adequately diked, and two were breached in 1970, releasing about 300,000 gallons into a small tributary. In 1971 , a cleanup was being conducted by Chemical Leaman, under an agreement with the Pennsyl- vania Department of Health. Chemical Leaman collected samples from the materials in the lagoons, sprayed the liquid that remained over the land, and filled the remaining lagoon pits with soil. The filled areas were then vegetated. In 1987, the EPA sampled private wells and springs used by local residents and found several to be contaminated with trichloroethylene (TCE). Chemical Lehman entered into a con- sent decree in 1995 with EPA to complete the design and implementation of additional clean-up activi- ties at the site . Continued on reverse- ------- The following tear off is provided for quick correspondence between the William Dick Lagoon Site team and the™| community. Simply mark the box which indicates your area of interest and mail to: Larry Johnson, EPA Community Involvement Coordinator 1650 Arch St, Mailcode 3HS43, Philadelphia, Pa 19103. ~ I don't want to receive future mailings about the William Dick Lagoons Site. ~ I would like to be contacted personally so that I can get more information about this site. ~ I am satisfied that periodic mailings such as this are sufficient to keep me updated about the site. ~ I think a PUBLIC MEETING should be set up to present (or explain) the information in this fact sheet. ~ Other (please call me) Name Address. .City and State. Phone Number Mobile Number Email address . Contact by Phone or (e) Mail (circle one) I J About the site-continued EPA completed an extension of the public water supply in May 1999. Approximately 115 homes near the Site have been connected to the public water supply. This extension provides public water to affected and potentially affected residents near the site. An interim groundwater extraction system consisting of five extraction wells to pump contaminated ground water near the site was recently constructed. The design of the treatment system that will be used to clean the contaminated ground water is currently underway. This design will include a plan to discharge treated groundwater to Birch Run in accordance with stan- dards set by the Pennsylvania Department of Environmental Protection (PADEP). The design is expected to be completed in 2005 with construction of the system to begin in 2006. The interim system will be op- erated for approximately five years followed by a final remedy which will be determined using data and information collected during the operation of the interim system. For More Information If you would like more information about the Site, please contact the following EPA representatives: Larry Johnson Patrick McManus Community Involvement Coordinator Remedial Project Manager (215) 814-3239 215-814-3198 (215) 266-0374 McManus.Pat@epa.gov johnson.larry-c@epa.gov £0161 Vd 'B!i|d|8pB|!i|d 188J1S L|OJV 0991 (£1?SH£) uosuiior Ajjbi £ U0|§8y A0U8§V UOjJOSJOJd |BJU8UIU0J!AU3 'STI ------- |