A key component of any large remediation project is planning a realistic schedule that takes into account the numerous steps from design to completion and addresses the inter-dependencies of each activity. The remediation at the Orrington Site has been divided into ten separate components and detailed schedules for each must be prepared well in advance to ensure designs and work plans are submitted to DEP with enough time for appropriate review and discussions. Then, when a final design is agreed upon, contractors are evaluated, requests for bids are sent out to these contractors, a contractor is selected and construction and restoration can be completed in the appropriate season.
During 2015 and early 2016, we completed a significant number of pre-design activities to provide data needed to develop the Corrective Measures Implementation Plans, also referred to as CMI Plans or simply, the designs. This work included soil and groundwater sampling throughout the former manufacturing area, installation of additional groundwater monitoring wells, additional investigations in and around Landfills 1 and 2 along with construction of material handling facilities that will be used for all remedial areas. The ten remedial areas and the anticipated start of construction are shown on the adjacent map.
Remediation of impacted soil also begin in 2015 starting with the Landfill Ridge, and continued through 2018 with the numerous areas described under Project Cleanup.
At this stage, the only remaining area is the Plant Area and Phase 2 of this remedy is expected to begin in late spring 2019. Mallinckrodt US LLC (Mallinckrodt) and DEP are working jointly to complete the site remediation, through ongoing team meetings to discuss technical submittals and review and finalize construction plans and ensure all parties stay on track to meet deadlines.