Anthropogenic Background Constituents of Concern Tim Terwilliger, - - PowerPoint PPT Presentation

ERMI 2018

Tim Terwilliger, P.E. Principal Engineer Environmental Risk Management, Inc. Tampa

Anthropogenic Background Constituents of Concern

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Acknowledgements

• Florida Brownfields Association Sub-Technical Committee:
• Mike Fisher, SCS Engineers
• Leslie Herd, Ramboll Environ
• Stephen Hilfiker, Environmental Risk Management, Inc.
• Richard Lewis, Lewis Solutions, LLC
• Brian Dougherty, Florida Department of Environmental Protection

• 1. Naturally occurring levels, which are ambient concentrations of chemicals

present in the environment that have not been influenced by humans

• 2. Anthropogenic levels, which are concentrations of chemicals that are

present in the environment due to human-made, non-site sources (e.g., industry, automobiles)

Ref: US EPA Risk Assessment Guidance for Superfund, Volume 1, Human Health Evaluation Manual (Part A). December 1989. EPA/540/1-89/002

EPA defines 2 different types of background levels of chemicals:

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Background Constituents of Concern

• Metals, primarily Arsenic
• Polynuclear Aromatic Hydrocarbons (PAHs)
• Benzo (a) Pyrene (BaP)
• BaP Toxic Equivalents (BaPTE)
• Pyrogenic sources (derived from combustion)

vs.

• Petrogenic sources (derived from petroleum)

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Natural Background Sources

• Fires
• Natural Oil Formations
• Weather Events

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Anthropogenic Background Sources

• Industrial combustion processes:
• Gasoline, diesel, creosote, coal tar, roofing tar, asphalt,

wood preservation

• Legal-label application of pesticides, herbicides and fertilizer
• Stormwater runoff and dredged sediments
• Stack emissions, automobile emissions
• Site Development:
• Burning waste, fill material, roofing tars, asphalt paving, asphalt

sealants

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References List (partial list)

Date Title Notes

Florida Studies

1988 A guide to the interpretation of metal concentrations in estuarine sediments. Schropp, S.J. and Windom, H.L., FDER 1997 Ecological impact of arsenic and other trace metals from application of recovered screen material on Florida soils. Scarlatos and Scarlatos 1997 Concentrations and Distributions of Eleven Metals in Florida Soils Ma, et al., University of Florida 1999 Baseline Concentrations of 15 Trace Elements in Florida Surface Soils Ming Chen, et al., University of Florida 5-Oct-01 Assessment of arsenic mobility in the soils of some golf courses in South Florida Florida International University 22-May-02 Determining Arsenic Distribution in Urban Soils: A Comparison with Nonurban Soils Chirenje, T., et al., University of Florida 1-Jul-02 Naturally Occurring Arsenic in the Upper Floridan Aquifer, Southwest Florida University of South Florida 9-Sep-02 U.S. EPA Guidance for Comparing Background and Chemical Concentrations in Soil EPA 8-Jan-03 Arsenic Bioavailability from Florida Soils: Uncertainty Evaluation University of Florida/FDEP 7-Mar-03 Recommendations for Update to Arsenic Soil CTL Computation Contaminated Media Forum 29-Nov-11 Benzo(a)pyrene (BaP) Investigation: Research and Field Analyses Environmental Risk Management, Inc. 1-Jan-12 Guidance for Comparing Background and Site Chemical Concentrations in Soil FDEP 3-Apr-14 Miami-Dade County Anthropogenic Background Study 28-Apr-14 Miami-Dade Presentation to CMF CMF = Contaminated Media Forum 8-Feb-16 Secondary Ground Water Standards at Solid Waste Facilities FDEP 17-Jan-18 U.S. EPA Urban Background Presentation EPA

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Florida DEP Data – Map Direct

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Miami-Dade Study

• Ref: Miami-Dade County

Background Study Presentation, Wilbur Mayorga, M.S., P.E., Chief, DERM, 2014

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Hinkley Center for Solid and Hazardous Waste Management

• Funded by FDEP; hosted by the University of Florida
• Background Concentrations of PAHs in Florida Urban Soils
• Plan to sample soils in Pensacola, Ocala, West Palm Beach,

and Clay County, starting with Ocala and Clay County https://www.hinkleycenter.org/

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Understanding the Sources

• Consider site history
• Consider surrounding area history
• Fill sources
• Flooding events
• Lithology
• Historical Fires

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FDEP Background Sampling Guidance

• “Guidance for Comparing Background and Site Chemical

Concentrations in Soil”

• Due to be revised soon…check Contaminated Media Forum
• Provides guidance for:
• Appropriately locating background soil samples
• Number of samples needed
• Approved statistical analytical methods

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Case Study

• Former Fina 6514, Miami, FL
• FDEP ID 06/8521982
• 2006 Supplemental Site Assessment Report (SSAR)
• Objective: Determine if non-naphthalene PAHs in

the unsaturated zone are a result of petroleum contamination and restricted to the site

• r

widespread throughout the surrounding area.

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Former Fina 6514 Case Study

• Detections of BaP that

did not match a discharge source

• Off-site concentrations

higher than on-site

Former USTs and dispensers 0.287 0.147

#.### BaP Concentration (mg/kg)

2.150 0.062 0.061 0.264 0.104 0.085 0.108 0.056 0.110 0.035 0.145 0.097

Questions? Contact Info:

Tim Terwilliger, P.E. 813-278-7100 tterwilliger@ermi.net