Liesch was retained by the St. Paul Port Authority and the City of St. Paul to complete a site investigation and implement response actions at the Westminster Junction Business Center/Phalen Boulevard site in St. Paul, Minnesota. The site is the location of former auto storage/salvage, waste transfer and rail roundhouse operations. The future development of the site consisted of an expansion of Phalen Boulevard concurrent with the clean-up of properties along the boulevard. This project utilized local, state, and federal brownfield funding.
The initial activity at the site included development of the EPA-required Quality Assurance Project Plan (QAPP) and the associated Site Investigation Work Plan (Work Plan). Owing to the required construction schedule, Liesch expedited development and approval of the QAPP and the Work Plan to allow field activities to commence quickly.
The investigation included installation of over 150 soil borings/geoprobes and test trenches, soil sampling and analysis, and monitoring well testing. The Site Investigation Report and Response Action Plan (RAP) included a detailed definition of specific areas within the business center and required remediation that was completed concurrently with the construction of Phase I of Phalen Boulevard. Liesch coordinated expedited review of the RAP to allow construction to commence on schedule.
As part of the proposed development, a number of existing structures were assessed and demolished. Asbestos, PCB, lead-based paint and other hazardous substances were assessed within the existing structures. This included assessing and sampling of sumps in the on-site buildings. Liesch developed the asbestos and hazardous material removals portion of the demolition specification and coordinated/inspected the removals prior to demolition of the buildings.