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Allied Leather Tannery Complex

Concord, New Hampshire

Services: Investigation, Feasibility Study, Remedial Design
Clients Served: Government

Loureiro was selected by the City of Concord as the environmental consultant to provide engineering services in support of final cleanup of the former Allied Leather Tannery Complex Site. Final cleanup is being performed in conjunction with NHDES and EPA Region I under a $600,000 cleanup grant for hazardous substances received from the EPA Brownfields Program. The site has a long history of industrial use dating back to the mid-1800s including long-time use as a textile mill up until the 1940s and later as a leather tannery up until the mid 1980s. Former site uses resulted in soil and groundwater contamination of various hazardous substances, including volatile and semi-volatile organic compounds, petroleum hydrocarbons, and chromium. Leather scrap (aka tannery waste) also still remains at the site.

Our environmental experts worked with the City to develop the best site cleanup approach with consideration to the City’s redevelopment vision of a mixed-use commercial building and a riverfront park on the eastern and western portions of the site. Loureiro’s cleanup approach involves the on-site reuse of approximately 6,000 cubic yards of coal-ash impacted stockpiled and near surface soils and 8,500 cubic yards of crushed masonry and the characterization, management, and off-site disposal of 1,100 cubic yards of contaminated concrete, 1,000 cubic yards of chromium-impacted, and 750 cubic yards of petroleum-impacted subsurface soils.

The cleanup involves substantial filling and regrading of the site utilizing as much of existing materials while facing geotechnical challenges related to soil reuse as well as permitting related to alteration of terrain (AOT) and shoreland protection. The project is on a one-year fast track schedule in order for new construction to begin and to bring renewed investment to the long time blighted, vacant and underutilized Penacook Village property as soon as possible.


  • Soil and Materials On-Site Management
  • Geotechnical Evaluation of Soils for Reuse
  • Soil Capacity Evaluation
  • Analysis of Brownfield Cleanup Alternatives and QAPP
  • Environmental Permitting
  • Cleanup Planning, Oversight and Regulatory Reporting