Use of Environmental Forensics In Drycleaning Investigations

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Forensic Techniques for PCE Investigationsat Dry CleanersAdditives (inhibitors, anti-oxidants, etc)Surrogate chemicals and materialsDegradation rate approach (half-life rates)Molar ratio approachIsotopic analysis (soil, groundwater, indoor air)
PCE StabilizersAcid InhibitorsAcetylenic alcoholsAcetylenic carbinolsAcetylenic estersAlcoholsAliphatic aminesAliphatic monohydric alcoholsAmidesAminesAzo aromatic compoundsEpoxidesHydroxyl aromatic compoundsKetonesNitroso compoundsPyridinesMetal InhibitorsAlcoholsAromatic hydrocarbonsCyclic trimersEstersLactoneOxazolesOximesSulfonesSulfoxideLight InhibitorsAminesCyanideHydroxyl aromatic compoundsNitrilesOrgano-metallic compoundsAntioxidantsAcetylene ethersPhenolsPyrroleThiocyanatesStabilizers and PCE (synoposis)Unlike TCE and TCA, PCE is relatively stable and requires only minor amounts of stabilizingadditives to prevent decomposition. Earlier stabilizers included amines and hydrocarbons; morerecent stabilizers include compounds such as morpholine derivatives. In the presence of water,unstabilized PCE will slowly hydrolyze to form trichloroacetic acid and hydrochloric acid.
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 and 12: PCE Enriched via Solvent Distillati
Page 13: Feedstock used for PCE Productionfo
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: Analytical DecisionsUnderstand the
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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