• Detailed remedial system design
• Off-site fabrication to minimize on-site interruption and to meet a tight regulatory deadline
• Startup testing and performance evaluation
• Ongoing routine operation, maintenance, and monitoring in alignment with facility operations
• System modifications to eliminate the surface water discharge and associated compliance concerns
Challenge
An active manufacturing facility required a groundwater containment and recovery system to address dissolved chlorinated solvents and protect nearby surface water, without disrupting production. The six-month regulatory schedule required compliance with strict facility-specific operational, safety, and aesthetic standards. Elevated calcium carbonate in groundwater also created scaling and maintenance concerns. In addition, revised EPA discharge requirements later required an alternative outlet for treated effluent.
Solution
GZA provided turnkey services, including engineering design, construction, startup, and ongoing operation of a groundwater extraction and treatment system on a fixed-price basis. The customized system included extraction infrastructure, underground piping, and treatment components designed around facility requirements. To mitigate potential permit exceedance concerns associated with surface water discharge, GZA designed and installed an on-site recharge gallery. GZA also implemented sequestering-agent dosing to reduce scale formation, and continues to provide operation, maintenance, monitoring, and annual process optimization.
Benefit
The facility met critical permitting and implementation deadlines while containing the solvent plume and protecting downgradient surface water. GZA’s system integrated with ongoing manufacturing operations, reduced scale-related maintenance, and provides continuous treatment without surface water discharge exceedances. Continued coordination with facility personnel minimizes production interruptions and identifies opportunities to improve performance and reduce operating costs.