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EMISSIONS OF METALS, CHROMIUM AND NICKEL SPECIES, AND ORGANICS FROM MUNICIPAL WASTEWATER SLUDGE INCINERATORS - VOLUME II: SITE 5 EMISSION TEST REPORT - HEXAVALENT CHROMIUM METHOD EVALUATION
Citation:
DeWees, W. AND R. Segall. EMISSIONS OF METALS, CHROMIUM AND NICKEL SPECIES, AND ORGANICS FROM MUNICIPAL WASTEWATER SLUDGE INCINERATORS - VOLUME II: SITE 5 EMISSION TEST REPORT - HEXAVALENT CHROMIUM METHOD EVALUATION. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-92/003b.
Description:
At Site 5, three candidate samplIng methods and two candIdate analytical methods for hexavalent chromium were assessed. he conversion of hexavalent chromium (Cr+8) to ther valence states of chromium during sampling and sample storage was of primary concern. ethod 5-type samples and impinger train samples were collected by PEI ssociates, Inc. ilution train samples were collected by Southern Research Institute. ethod 5-type train samples were analyzed by Technology Applications, Inc.'s (TAI) staff under contract to EPA's Environmental Monitoring Systems Laboratory (EMSL) in Cincinnati, Ohio. ilution train samples, Method 5-type samples, and impinger train samples were analyzed by Entropy Environmentalists, Inc. AI used an ion chromatograph with post column reaction (IC/PCR) and inductively coupled argon plasmography/mass spectrometry (ICP/MS) to analyze the Method 5-type samples. table chromium isotope (63Cr+8) spiked onto the Method 5 filter prior to sample collection was used to assess conversion of Cr+6. he samples analyzed by Entropy were collected using a dilution train on an 8.5 in X 11 in glass fiber filter, a Method 5-type sampling train on an 82 mm quartz fiber filter, and an impinger sampling train with an alkaline impinger reagent, and spiked with native hexavalent chromium and a radioactively-labeled chromium isotope (51Cr+6). he amples were analyzed for hexavalent chromium by IC/PCR and for the radioactive isotopes by scintillation (gamma) counting. MSL has not released the TAI data. he reliminary method evaluation testing demonstrated that all sampling methods had roblems with conversion of hexavalent chromium.