2BackgroundMore than 290 sites in Connecticut have been identified as “Brownfield Sites.”These are parcels of property once used for industrial, commercial or manufacturing and are now typically abandoned due to suspected contamination.Often these unused parcels adversely affect the quality of living in the area and may pose potential health risks to local citizens.Financial assistance is available from the state and federal governments to assess and remediate these sites
3What are ‘Brownfield Sites’? 1990’s- Fed. And State Government decided to take action on land that was sitting unused because of the potential hazards that they contained.Unknown liabilities were preventing communities from restoring these sites.
4What are ‘Brownfield Sites’? CT- state remediation programs and standards are in place to help promote the cleanup and redevelopment of sites.Connecticut Remediation Standard Regulations
5Federal Brownfields Law Jan. 11, Federal Law expands assistance for brownfields assessment, cleanup, revitilization , and job training.
6Stages of Brownfield Remediation Inventory of Sites: what’s there and how muchAssessment: Can reclamation occur?Funding: Federal and/or PrivateAmount required for each stage of redevelopmentRemedial Design and ConstructionApply appropriate technology to clean or contain pollution13 approved clean-up technologies just for USTsEach site clean-up is specific to the pollutants and geology of that sitePackage site for sale or development
7Assessment Develop understanding of: Impact on the environment Type of pollutantsHorizontal & vertical extent of pollutionImpact on the environmentAre streams, lakes, rivers polluted?Is the underground water table polluted?Is the pollution localized or widespread?Are plants/animals affected?
10Possible Contaminants Possible source of contaminationHeavy metals: arsenic, cadmium chromium, lead, mercurymetal finishing/plating shops, manufacturing and foundries, coal burning power plants and landfillsGasoline/constituents of gasoline: gasoline, benzene, ethylbenzene, toluene, xylenegasoline stations, tank farms, pipelinesSolvents: tetrachloroethlyene, trichloroethylene, III-trichloroethanedry cleaners, machine shops, metal finishing/plating shopsPetroleum products leaking underground storage tank methane gas decomposing waste materials found in landfills PAH (polycylic aromatic hydrocarbons)PAHs are a group of over 100 different chemicals formed during the incomplete burning of many things including coal, oil, garbage, and cigarettes.Methane gasdecomposing waste materials present in landfills.explosive chemicals that are designed and produced for use as an explosive (e.g., TNT, explosive bolts, bullets, blasting caps, and fireworks).Explosives manufacturing company
11Case Study: Waterbury, CT Development – Brass Mill Center Mall The long defunct, brass manufacturing center, once comprised of more than 90 decaying buildingsProcessed brass until alternate/cheaper alternatives available100-acre downtown site, was prepared for a rebirth.
12Case Study: Waterbury, CT Development – Brass Mill Center Mall Removal of asbestos, lead paint, metals, solvents, oil, machinery, and polychlorinated biphenyls (PCB) contaminated materials.Over 200,000 cubic yards of debris was removed or recycledSoil vapor extraction and on-site treatment were used to treat the 155,000 tons of tainted soil.
13Case Study: Waterbury, CT Development – Brass Mill Center Mall The entire demolition and remediation was completed well ahead of schedule and under budgetconstruction of the 1,300,000 square foot Brass Mill Center was then completed
14To be answered: General description of site: Contaminants: Name, Location, Site DefinitionContaminants:Types in location, Why are they there, affects on environmentInvestigationformulate a question about the site that may be answered through scientific investigation and to design the investigation.Do not worry about the specific steps needed to isolate the contaminant or specific techniques used to measure the contaminant’s effect on the environment. Focus on writing a general plan for your investigation including the independent and dependent variables to be studied, general procedures you will follow and the data you will collect.