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(CONTOURS SHOW: 1. 5. 10)

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FIGURE 6. Occurrence of ground water in the Piedmont.

Reference: E.G. Otton, et. al., (1988), Maryland Geological Survey, Bulletin 34

3RJU8570

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Dissolution» MnO2 + 4H+ » Mn2+ ± 2HO

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Re-Precipitation» Mn2+ vMnO(s> + O

References: W. Stumm and J. Morgan, AquaticChemistry

•r'GERAGHTY£&8 MILLER, INC.

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5 — in Groondwater1987,1990 and 1996JPrnnronmentcd Sarvicesr

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GERAGHTY& MILLER, INC. Observed vinyl Chloride Concentration

in Groundwater, November, 1987Environmental Servicesf

Woodlown LondfiH, Cecil County, MarylandC°mpany enOGESTON^RESTOlTE

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GERAGHTY& MILLER, INC.

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Observed Vinyl Chloride Concentrationin the Saprofte, March, 1996

BRIDGESTONE/FlRESrONEWoodlown Landfill. C«cil County. Maryland

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GERAGHTY? MILLER, INC. Observed Vinyl Chloride Concentration

in the Bedrock, March, 1996Snvinynmertial Servicest

Woodlcwn Landfill. Cacil County, Maryland

A H«Id«miI Company' r ' BRIDCESTONE/flRESTONE

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IRJU859'6

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•--.— TRAILS-M« OBSERVED VINYL CHLORIDE CONCENTRATION (ppb)

(CONTOURS SHOWN: 1, 5,. 10)H ''^ APPROXIMATE LANORLL BOUNDARY

———— 1996-VINYL CHLORIDE CONCENTRATION (20-ppb)

„..„.-.-,. 1987-V1NYL CHLORIDE CONCENTRATION (20-ppb)

GERAGHTYMILLER, INC.

Environmental Services

Vinyl CNoride 20ppb Concentrationin Groundwater, November, 1987 and March, t996

BRIDGESTONE/nRESTONEWoodlown Landfill, C«il County, Maryland

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WHY IS IT HAPPENING ?

• Anaerobic Dechlorination» CH2 = CHC1 » CH2 = CH2 + Cl

• Aerobic Oxidation (Most rapid)» 2O2 + CH2 = CHC1 » 2CO2 + 3H+ + Cl

• Anoxic Oxidation» 10 Fef + CH2 = CHC1 + 4H2O » 2C02 +

'

Volatilization

Sorption (very low for vinyl chloride)

References: Gossett, J.M. andS.H. Zinder (1996), Symposium on Natural Attenuation ofChlorinated Organics, Dallas, Texas.Bradley, P.M. andF.H. Chapelle (1996) Symposium on Natural Attenuationof Chlorinated Organics, Dallas, Texas. :\ ft '_] |j Q g'Q Q

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