Chemical Manufacturing Facility - Southeast

Value of Project: $3.5 Million

Scope: Chlorinated Hydrocarbon Assessment and Remediation

The facility/site has been a chemical manufacturing facility since the early 1960’s. In 2004, 1,1,1-Trichloroethane (TCA) and other chlorinated hydrocarbons were detected at levels requiring the site to be listed in the Georgia Hazardous Site Inventory database. Further assessment and delineation activities revealed that the dissolved-phase plume extended over ½-mile horizontally and over 150 feet vertically into bedrock. A Remedial Action Plan was approved by the Georgia Environmental Protection Division which included the following technologies: groundwater extraction and treatment, air sparge (AS), soil vapor extraction (SVE), and chemical oxidation (Chem-ox).

Maxis was retained by the client to design, install, and operate the remediation systems as well as manage all regulatory communication and reporting activities associated with the soil and groundwater contamination. Due to the magnitude and overall size of the dissolved-phase plume, Maxis designed the remedial system to be implemented in multiple phases; this would allow more flexibility and adjustment to the design/system could be made based on empirical data. Currently, Maxis began implementing the first phase of remediation. The overall system (all three phases) includes 35 AS wells, 25 SVE wells and 30 groundwater extraction and Chem-ox injection wells.

Maxis overcame several obstacles during this project including zoning/permitting issues, air emission requirements and emergency control integration with the existing manufacturing processes at the facility. Additionally, Maxis designed the water treatment equipment to not only handle the contaminated groundwater from the subsurface but also the storm water and process water generated at the facility; this design modification will save the client over $200,000 annually, related to off-site wastewater disposal expenses.