Use of Environmental Forensics In Drycleaning Investigations

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Major Manufacturers of PCECompanyApproximate Period of ManufactureDiamond Alkali/Diamond Shamrock 1950 ±1986Dow Chemical1923 ± presentE. I. Du Pont de Nemours 1933 ± 1986Ethyl Corporation 1967 ± 1983Frontier Chemical/Vulcan Materials1958 ± presentHooker Chemical/Occidental Chemical 1949 ± 1990Hooker-Detrex/Detrex Chemical 1947 ± 1971Pittsburgh Plate Glass/PPG Industries1949 ± presentStauffer Chemical 1955 ± 1985Westvaco Chlorine 1940 ± 1945
Feedstock used for PCE Productionfor Age Dating PCEThe primary production method for PCE prior tothe 1970s involved the chlorination of acetyleneto produce PCE/TCE. By 1978, acetyleneproduction ceased.Subsequent productionmethods used ethylene asa feedstock to produceethylene dichloride (1,2DCA). In 1975, PCE productionwas 44% via propane chlorinolysis,35% via 1,2-DCA chlorination and3% by acetylene chlorination.
Page 1 and 2: Use of Environmental ForensicsIn Dr
Page 3 and 4: Presentation OutlinePCEWhere to sam
Page 5: Synonyms for PCEChemical namesCarbo
Page 8: PCE Applications (b)• Rubber diss
Page 11: PCE Enriched via Solvent Distillati
Page 16 and 17: The presence of 1,1,2,2-TeCA and/or
Page 18 and 19: EPA Method 8270 - Substituted Pheno
Page 20 and 21: Where to Sample?Knowledge of Drycle
Page 22 and 23: Traditional v. Forensic SamplingTra
Page 24 and 25: Sources of Muck
Page 26 and 27: Surrogate Chemical Signature Associ
Page 28: Muck from Expansion Joint Material(
Page 31 and 32: Case StudyExpansion Joint SamplingE
Page 33 and 34: Sewer Videos - Sewer Sampling
Page 35 and 36: Analytical DecisionsUnderstand the
Page 37 and 38: PCE StabilizersAcid InhibitorsAcety
Page 39 and 40: TCE StabilizersMetal stabilizers us
Page 41 and 42: Manufacturers of PCE for Dry Cleani
Page 43 and 44: Distinguishing Drycleaner fromTrans
Page 45 and 46: Metal Cleaning v. Dry Cleaning (b)D
Page 47 and 48: Co-mingled PCE-SeparateSources• P
Page 49 and 50: Isotopic Analysis for Source Discri
Page 51 and 52: Degradation Rate Approach
Page 53: THANK YOU

Use of Environmental Forensics In Drycleaning Investigations

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