This file contains 24-hour integrated measurements of ammonia and nitric acid
collected during the 2000/09/30 through 2001/05/22 period at the HRM Site 3,
Aldine, and Deer Park Houston Supersite monitoring locations. Samples were
collected using a coated annular diffusion denuder downstream of a teflon
filter and analyzed by ion chromatography.
Data Set Change History
Measurements of ammonia and ... nitric acid were quantified as ammonium and nitrate
using ion chromatography. Effective August 27, 2004, the *TABLE COLUMN NAME
and *TABLE COLUMN CAS IDENTIFIER values in the main data table have been
changed from ammonium and nitrate to ammonia and nitric acid to clarify that
these are gas-phase measurements. The data set name was changed from "NARSTO
EPA_SS_HOUSTON Ammonium and Nitrate Data"?to "NARSTO EPA_SS_HOUSTON Ammonia and
Nitric Acid Data". ?No data values were changed.
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