Former Manufactured Gas Plant Remediation

Messer Street Former Manufactured Gas Plant Remediation - Phase I & II Maxymillian Technologies served as the remedial construction contractor to remove soils and river/bay sediments contaminated with coal tar byproducts. Extensive sitework in and around waterways placed a special emphasis on sheeting, dredging technology, and water treatment. Phase I work included Waterloo Sheeting installation, water treatment (60,000 gallons), excavation (2200 tons), surgical sediment vacuuming, installation of a passive recovery system, backfill, and site restoration. MT coordinated highly technical and challenging Waterloo sheetpile barrier installation with the Plymouth & Lincoln Railroad and Waterloo licensed personnel, while consistently hosting regulators and extensive community and media representatives. After successfully completing Phase I of the Messer Street remediation, MT was re-contracted to finish the remainder of the project. Once the source materials had been substantially removed, and the Phase I barrier cell installed, Phase II of the project included the removal of over 17,000 cubic yards of sediments from the adjacent river. MT installed extensive 30-foot deep temporary sheets and special turbidity controls in the river. During the most intense part of the project, the 30-day drawdown, MT worked additional shifts and 6 days per week to maximize the amount of materials removed. This involved multiple crews, several excavators, including 2 low ground pressure long reach excavators, and an increase in project management personnel. During the drawdown, MT removed over 6800 cubic yards, or 43% more than our minimum success criteria. Our removal rate ranged from 350 to 600 cubic yards per day. MT installed a Water Treatment System designed, owned, and operated by MT, and treated/discharged 215,000 gallons of water that had met regulatory criteria. "You accomplished every element of the workplan with the highest professional standards and under budget…This project now becomes the standard for which other site remediation projects will be measured." -Ron Klattenburg, NU Client: Northeast Utilities Consulting Engineers: Haley & Aldrich Location: Laconia, NH Project Manager: Alan N. Steinhoff back to Experience

above: Sheeting installation along river below: MGP soil excavation Project Highlights Completed 3 months ahead of schedule Completed $700,000 under budget Extensive regulatory involvement with NH DES, POTW, local community First full-scale Former Manufactured Gas Plant (MGP) Remediation to return water body to swimmable/fishable conditions