IDIAS/SEPI, under an IDIQ contract with MIDLANT, is the engineer of record performing civil engineering designing required for the construction of an innovative groundwater remediation system using a permeable reactive barrier backfilled with organic matter to passively remove chlorinated solvents from the groundwater at Camp Lejeune in Jacksonville, NC.
This project includes remedial action construction in response to leaking UST. IDIAS/SEPI was responsible for the installation of two permeable reactive barriers (PRBs), network of monitoring wells, and an aeration system in a nearby creek. The project also included baseline sampling for PRB performance monitoring and impact to creek.
IDIAS/SEPI designed all aspects of the site/civil design including erosion control measures; excavation and backfilling; site restoration for the installation of two Permeable Reactive Barriers (400-LF and 275-LF); and associated network of up- and down-gradient monitoring wells. IDIAS/SEPI also performed a topographic survey and developed stormwater and erosion control plans to delineate and develope wetland mitigation plans to restore approximately 1.4 acres of existing wetlands present within the work area.
The project involved design of erosion controls, including site grading and drainage, by incorporating stormwater BMP and LID features including a wet retention pond and water quality swales to detain water and collect sediment.
IDIAS/SEPI designed a work platform necessary to support one-pass trencher and support equipment operating within wetlands limits. The innovative design of the platform allowed for modification of stormwater and erosion control system to a closed system to prevent off-site migration of contaminated excavated materials.