Illinois Location Krista Brodersen Contact Service Lines Environmental ComplianceSite Assessment & Brownfields Redevelopment Project Summary Blackstone conducted a Phase I ESA in September 2020 on a 115-year-old manufacturer of carbon steel, aluminum, stainless steel, copper, and brass. RECs identified included the current and former use of the facility, the presence of a diesel aboveground storage tank (AST), leaks, spills, stains, and absorbent observed beneath ASTs and drums, the presence of a paint booth and current and former chemicals associated with paint booths (solvents and paint thinners), the former presence of an on-Site rail spur, the past use of trichloroethylene, xylenes, and toluene, and the historical use of the surrounding properties as a foundry, industrial laundry, municipal garage, and power company. Services Provided The Phase II ESAs consisted of advancing soil borings and sampling soil and groundwater at properties used for auto repair, auto salvage, oil warehouse, and as construction companies. The results were compared to the Iowa Statewide Standards and a risk evaluation was conducted.…
Iowa Location Krista Brodersen Contact Service Lines Environmental ComplianceSite Assessment & Brownfields Redevelopment Project Summary Blackstone provided services to an Iowa municipality in the form of conducting five Phase II ESAs. The Phase II ESAs were conducted at properties that were being considered for purchase and were used in obtaining a Federal Emergency Management Agency (FEMA) Hazard Mitigation Grant Program (HMGP) acquisition grant. Services Provided The Phase II ESAs consisted of advancing soil borings and sampling soil and groundwater at properties used for auto repair, auto salvage, oil warehouse, and as construction companies. The results were compared to the Iowa Statewide Standards and a risk evaluation was conducted. Once the properties are obtained, the buildings are planned to be razed and the properties left vacant for flood maintenance.
Iowa Location Emily Smart Contact Service Lines Site Assessment & Brownfields Redevelopment Project Summary The former Flexsteel manufacturing property is a 43-acre site is located at 3400 Jackson Street in Dubuque, Dubuque County, Iowa. The site was developed with a 715,000-square-foot building and associated outbuildings that were formerly used for manufacturing furniture for residential, commercial, recreational vehicle, and marine applications. Previous uses of the site included a railyard, manufacturing facilities, auto supply storage, and a sawmill, with manufacturing processes on the site dating to at least 1911. The northern area of the property consists of sizeable wetlands and riparian lengths. Services Provided Blackstone conducted wetland delineation, oversaw hazardous materials abatement prior to demolition, and is currently assisting Flexsteel with redevelopment planning and completion of the Land Recycling Program for this large site. Following extensive soil and groundwater sampling, a Site Assessment Report is currently under review with the Iowa Department of Natural Resources and Risk Evaluations/Risk Assessments will be completed for individual portions of the…
Iowa Location Emily Smart Contact Service Lines Site Assessment & Brownfields Redevelopment Project Summary Blackstone provided services to The City of Dubuque for a Brownfields redevelopment project at the former Blum scrapyard. The Blum scrapyard covered a city block redevelopment that included renovation of and improvements to a four-story building situated and demolition/deconstruction of other site structures. The site is located in an area of Dubuque where industrial, commercial, and residential meet and is considered part of the Washington Neighborhood. The City secured two EPA Brownfields Cleanup grants for the site, focusing on hazardous materials remediation and Land Recycling Program completion. The City also completed extensive community engagement activities, incorporating citizen comments into plans and renderings. The community’s desire was largely to use the site as varied recreational space. The City’s desire was to provide that recreational space in addition to the rehabilitation of the four-story brick building on Elm Street to house the Leisure Services Department, placing them in the heart of the community…
Kansas Location Emily Smart Contact Service Lines Site Assessment & Brownfields Redevelopment Due Diligence Project Summary Blackstone Environmental, Inc. conducted a Phase II Brownfields Targeted Assessment (BTA) project as a team with Golder Associates of Denver, Colorado, who are the primary contractor under a state contract with KDHE. The Site is a national historic landmark associated with the Brown vs. Board of Education court case. A Phase I of the Site found a recognized environmental condition (REC) for potential petroleum contamination associated with a former 2,000 gallon underground storage tank (UST) used to heat the school. The actual location of the tank was unknown, but it thought to be located inside of the building basement. Services provided by Blackstone included: Services Provided Conducting a pre-mobilization Site visit with KDHE and the local neighborhood association representative to help determine where the former tank may have been located;Developing a work plan, quality assurance project plan (QAPP), and health and safety plan (HASP) for soil and groundwater sampling;Completing…
Kansas Location Rowley Tedlock Contact Service Lines Environmental ComplianceSite Assessment & Brownfields Redevelopment Project Summary Hodgdon Powder Company (Hodgdon) has manufactured propellant at their facility in east-central Kansas since 1979. The propellant is gunpowder that is a formulation of potassium perchlorate, potassium nitrate, sulfur, and charcoal that is an alternative to black powder. A Remedial Investigation (RI) at the site revealed a plume of perchlorate contamination in groundwater which extends over an area of several square miles with perchlorate identified in at least three separate fractured bedrock aquifers. Perchlorate contamination was also identified in surface water and on-site soils. Services Provided Blackstone staff involvement has included management of remedial activities at the site as well as assisting Hodgdon with ongoing environmental compliance issues. Remedial activities included implementation of interim remedial measures (IRM) to achieve source-area cleanup of impacted soil. Enhanced biological reduction of perchlorate was successfully achieved in source-area soils via mixing of no-cost carbon-donor material from a neighboring cattle feed lot. This innovative remedial…
Kansas Location Rowley Tedlock Contact Service Lines Due Diligence Site Assessment & Brownfields Redevlopment Project Summary Blackstone Environmental was retained to perform an environmental evaluation of a decommissioned metal plating facility. Intrusive sampling and testing revealed hexavalent chromium impact to soil, with a minor component of volatile organic carbon (trichloroethylene) impact to soil. Blackstone conducted additional exploration to evaluate the extent of impact and to characterize site hydrogeology. Potential viable remediation strategies were evaluated through bench and pilot-scale testing. Services Provided Contaminant investigation and hydrogeological characterizationEnrollment of the site in the Kansas Voluntary Cleanup ProgramBench-scale testing for in-situ chemical fixation with calcium polysulfideImplemented pilot-scale testing as an Interim Remedial Measure (IRM) Results The depth of the impact limited the ability to physically remove contaminated media for treatment. The selected remedial alternative involved in-situ chemical fixation by amending impacted soil with calcium polysulfide which would reduce the very mobile and toxic hexavalent form of chromium to the stable, much less toxic trivalent chromium. The in-situ chemical…
