Voluntary Investigation & Cleanup Program Site: St. Paul, Minnesota
Leggette, Brashears & Graham, Inc. (LBG) represented a large shopping center developer in the purchase and re-development of a contaminated property located in one of the most heavily used commercial districts of St. Paul. Operating under Minnesota’s Voluntary Investigation and Cleanup (VIC) Program, LBG completed Phase I and II Investigations, a Feasibility Study, a Risk Assessment, and a Remedial Action Plan before successful implementation of the innovative system.
Remedial system installation commenced in the fall of 1998 with LBG performing all oversight and project management activities. Multi-phase extraction and soil-vapor extraction systems were installed and effectively mitigated a PCE release from a dry-cleaning establishment in soils consisting of clay, silt, and little sand.
Phase I – LBG conducted initial Phase I in the Minnesota VIC program. In addition, LBG assisted in securing federal, county and TIF funding for the project.
Subsurface Investigation/Phase II – a Phase II Investigation was conducted under the VIC Program and helped determine the extent of chlorinated solvent contamination in the subsurface soils and groundwater.
Quality Assurance Project Plan (QAPP) – LBG prepared QAPP-equivalent documents for all phases of this project.
Health Risk Assessments – Air dispersion modeling in conjunction with a health risk assessment was conducted, resulting in the elimination of over $200,000 worth of air emission control equipment.
Feasibility Study/Response Action Plan/Design – LBG identified and evaluated a wide spectrum of proven and innovative remediation technologies, subsequently implementing the innovative adaptation of existing multi-phase extraction (MPE) technology.
Site Cleanup/Remedial Response Action Monitoring/Oversight – LBG prepared detailed construction drawings and specifications, assisted owner in evaluating bids, construction oversight, interaction with regulators and the public, system start-up, and system operation. LBG also complied with City of St. Paul Affirmative Action policies.
Waste Characterization – LBG was responsible for decommissioning dry cleaning solvent equipment, closing waste PCE sumps, characterizing and coordinating disposal of waste from dry cleaning equipment decommissioning and soil cuttings.
Worked with regulators to negotiate favorable cleanup criteria for client resulting in accelerated redevelopment.
Award-winning remedial design resulted in savings of $400,000 when compared to traditional techniques.
LBG was awarded patent for innovative extraction well design that overcame lift limitations. This resulted in securing certificate of completion in 3 months.
Installed system in a high traffic area with minimal disruption to adjacent businesses.
As a result of the data presented in the Phase I and Phase II assessments, and subsequent remedial efforts, the MPCA VIC program was able to issue a No Further Action Determination assurance letter to the property owner. The results of this remedial effort accelerated the property transaction.