Draft VOC air sampling plan for WTC community, Oct 2001

NYC 9/11 Public Portal Document

Aldehydes

ANALYTE i Formaldehyde 2 Acetaldehyde___________ 3 Acrolein 4 Acetone 5 Propionaldehyde_________ 6 Crotonaldehyde_________ 7 Butyraldehyde___________ 8 Benzaldehyde___________ 9 Isovaleraldehyde_________ 10 Valeraldehyde___________ 11 O, M, and P - tolualdehyde 12 Hexaldehyde____________ 13 2,5-dimethylbenzaldehyde

The Bronx Asthma study (Jan 1999-Nov 2000) included the above analytes using the same methodology. That dataset will provide a good reference for the aldehyde data. Additionally, the EPA database and the EPA base database have formaldehyde results. Aldehyde air levels will be evaluated with available health-based air comparison values for acute, intermediate and long-term exposure. Also, odor and irritancy values will be considered when available.

Acids

__________ _________ ANALYTE_____________________ i Hydrochloric acid (as per denuder system)________________ 2 Sulfuric acid (as per denuder system)_________ ___________ 3 PM 2.5 Acidity-pH of the filter (aerosol as per denuder system) 4 PM2.5 Sulfate on the filter (aerosol as per denuder system) 5 HONO_____________________________________________ 6 HNO3_____________________________________________ 7 Inorganic Acids (as per NIOSH Method 7903) Sulfuric, Nitric and Hydrochloric acids

The pH of the PM2.5 aerosol and the sulfate concentration of the aerosol were measured for the entire Bronx Asthma Study (Jan 1999 -Nov 2000) period. HCl, HONO, and HNO3 were measured during the Bronx Asthma Study from July 1999 to June 2000. The Bronx asthma study included sampling in Manhattan and these data will be used as a reference. NIOSH Method 7903 (sulfuric acid) has been used in monitoring the personnel working at the world trade disaster. These data will also be used as a reference. Most of the data from the NIOSH methodology has shown just trace amounts, which is probably because the detection limit for this method is high. Levels of acids in air will be evaluated with available health-based air comparison values for acute, intermediate and long- term exposure. Also, odor and irritancy values will be considered when available.

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