2 BackgroundMore 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.
3 Task-ID a Brownfield Site… Find a nearby CT Brownfield site by clicking on the Brownfield Inventory link found at the Connecticut Department of Environmental Protection’s website:(main page)(direct to inventory)What has the property been used for that led it to being identified as a Brownfield site?Use a search engine such as Google to research one of the potential contaminants at the site.Some major contaminants & their possible sources are given on the next slide to help you.
4 Possible source of contamination Heavy metals: ContaminantPossible source of contaminationHeavy metals:ArsenicCadmiumChromiumLeadMercurymetal finishing/plating shopsmanufacturing & foundriescoal burning power plantsGasoline/constituents of gasoline:GasolineBenzeneEthylbenzeneTolueneXylenegasoline stationstank farmspipelinesSolvents:TetrachloroethlyeneTrichloroethyleneIII-trichloroethanedry cleanersmachine shops
5 Task-Ask a ? & Design an Investigation Formulate an experimental question about a Brownfield site that may be answered through a scientific investigation.Design an investigation that would enable you to answer your question.Formulate a general procedure for exploring the effect the contamination may have on the site or nearby property.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. Include a control group if appropriate.
6 Possible Investigation Ideas Design an investigation that focuses on one specific chemical &:its contamination plume at the site.You will want to consider:where the sampling will occur (water, soil, air)the number of test sitesdistances from the sourceetc.its influence on one species in the area.which plant or animal you want to studywhat type of effect you are looking for in that plant or animal (Ex. concentration of contaminant in relation to height, weight, etc.)
7 ExampleWhat has the property been used for that led it to being identified as a Brownfield site?What are some possible major contaminants at this site?
8 ExampleWhat could we ask as our experimental question? (What problem do we want to investigate?)Formulate a hypothesis… (Make an educated “guess” as to what the outcome may be.)Use this format: If…, then… because.
9 Example What is your independent variable? Identify your dependent variable?What is your control? (your basis for comparison)What factors are you keeping constant? (What are you keeping the same throughout your experiment?)
10 ExampleWhat general procedures you would follow to conduct your investigation? (list steps)Now it’s your turn…
11 Grading Total = 20 points Experimental Question = 4 points Hypothesis = 4 ptsIdentify your Independent Variable = 2 pointsIdentify your Dependent Variable = 2 pointsIdentify your Control & Constants = 2 pointsGeneral Procedures for conducting your investigation = 6 points