Case Study - Operation, Maintenance and Monitoring
Project Overview
Following the completion of Massachusetts Phase I through Phase III Response Actions at an active bulk fuel oil distribution facility, EnviroSense designed, installed, and operated a multi-phase extraction system. The system utilized a combination of remedial technologies to: 1) recover free-phase petroleum product floating on the ground water table; 2) recover, treat, and discharge ground water impacted by dissolved phase petroleum compounds; and 3) treat petroleum-impacted soil via soil vapor extraction (SVE). EnviroSense technicians performed operation, maintenance, and monitoring (OM&M) activities on the system during its operation.
Prior to construction of the multi-phase extraction system, EnviroSense professionals prepared a Phase IV Remedy Implementation Plan (RIP) in accordance with requirements described in the Massachusetts Contingency Plan (MCP). The Phase IV RIP included technical specifications, design plans, and OM&M requirements for the system.
EnviroSense Role
- Prepared construction design and specifications for the multi-phase extraction system capable of collecting non-aqueous phase liquid (NAPL); extraction, treatment, and discharge of petroleum-impacted ground water; and extraction, treatment, and discharge of petroleum soil vapors.
- Supervised installation of two, six-inch diameter recovery wells and four, four-inch diameter vapor extraction wells.
- Supervised environmental construction activities that included over 300 feet of utility trenches, installation of subsurface piping, and construction of two recovery well vaults.
- Performed routine OM&M activities including ground water monitoring, monitoring of soil vapor extraction system discharges, monitoring of ground water treatment and discharge, and monitoring of NAPL recovery.
- Prepared regulatory submittals as required by the Massachusetts Contingency Plan, including a Phase IV Final Inspection Report and Completion Statement, an As-Built Construction Report, and Inspection and Monitoring Reports.
