29 Pesticide Plant Soil Risk - CEE 597 Lecture...

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EE 597 cture CEE 597 Lecture Environmental Risk Analysis xamples Examples 4 April 2007Jery Stedinger Lecture 28 1
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Readings for This Topic Stevens and Swackhamer, "Environ. Pollution: A multimedia approach . . .” McKone, ". ..Exposure . . from Multiple Media nd through Multiple Pathways. .." a d oug u p e a ays. .. ATSDR Public Health Assessment Guidance Manual Davis and Cornwell, “Air Pollution” Marshall, et al., “Risk Assessment at a Former Pesticide Production Facility” 4 April 2007Jery Stedinger Lecture 28 2
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What class should be learning What people do— What they try to analyze How people do it— What models they use a ode s ey use How these models work (theory vs empirical) What criteria they compute How good is it— How accurate are predictions likely to be? What issues can they resolve? 4 April 2007Jery Stedinger Lecture 28 3
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Marshall, et al., “ isk Assessment at a Risk Assessment at a Former Pesticide Production Facility” 4 April 2007Jery Stedinger Lecture 28 4
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RA at Former Pesticide Production Facility Illustration of issues and analysis Organization of real study any many chemicals Many many chemicals Select indicators Use pathway analysis rather than box models 4 April 2007Jery Stedinger Lecture 28 5
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A Risk Assessment of a Former Pesticide roduction Facility Production Facility 4 April 2007Jery Stedinger Lecture 28 6
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Flowchart of risk assessment process 4 April 2007Jery Stedinger Lecture 28 7
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Pesticide Plant and Facilities 70 chemicals present in samples 15 indicators were focus of study 2,3,7,8 TCDD represented all dioxins Arsenic all metals (see pg 480) 4 major structures + Tank farm ajo s uc u es a a 3.4 acres in industrial section of a major city 100,000 people within 1 mile Site once tidal marsh, bounded by tidal river Mostly fill on 30% of acre Flooding possible Shale & sandstone bedrock at 90 feet 570 55-gallon drums of material on site 4 April 2007Jery Stedinger Lecture 28 8
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Security and Monitoring Current control measures after discovery of problems 4 hr security guard 24 hr security guard Fence Permeable geo-textile fabric over site excluding building & equipment Ambient Air Station on building 10 m above ground F r each of 31 days Æ ept- ct 24 hour samples o eac o 3 days Sep Oc ou sa p es 10 samples with highest Manganese and Iron analyzed Other sources most constituents Didn’t think site was a major source of many chemicals jy detected Æ vinyl chloride Priority Pollutants-129 compounds identified by EPA 4 April 2007Jery Stedinger Lecture 28 9
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Location of analytical samples 4 April 2007Jery Stedinger Lecture 28 10
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Schematic of surface water and groundwater athways pathways 4 April 2007Jery Stedinger Lecture 28 11
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Ambient Air Results for 10 samples 4 April 2007Jery Stedinger Lecture 28 12
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Summary of detected pollutants 4 April 2007Jery Stedinger Lecture 28 13
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Summary of detected priority pollutants -2 4 April 2007Jery Stedinger Lecture 28 14
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Summary of detected compounds 4 April 2007Jery Stedinger Lecture 28 15
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Indicator chemical selection 4 April 2007Jery Stedinger Lecture 28 16
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29 Pesticide Plant Soil Risk - CEE 597 Lecture...

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