Monitoring for PAH and criteria pollutants in Contra Costa County, CA, 1979-1986
- California Dept. of Health Services, Berkeley, CA (USA)
- Bay Area Air Quality Management District, San Francisco, CA (USA)
Concentrations of three polycyclic aromatic hydrocarbons (PAH) were monitored in ambient air at three locations in Contra Costa County from November 1979 through October 1986. Benzo(a)pyrene(BaP), benzo(k)fluoranthene(BkF) and benzo(ghi)perylene(BghiP) concentrations as wells as criteria pollutants were measured concurrently at the same locations. This report describes seasonal variations and seven-year trends. PAH and most criteria pollutant concentrations were highest in the winter, when ventilation in the Bay Area is the lowest. Statistically significant downward trend in annual average concentrations of lead (Pb), sulfates (SO{sub 4}{sup -}), total suspended particulates (TSP) and ozone (O{sub 3}) were observed. The decrease in lead was especially dramatic and widespread, averaging about 20% per year and occurring in every season and at every station. In contrast, CO concentrations increased at an annual rate of about 6%; mobile sources probably were responsible for the increase in CO. In general, PAH concentrations did not change greatly. However, increases in benzo(a)pyrene were seen.
- OSTI ID:
- 5053752
- Report Number(s):
- CONF-870695-; CODEN: PRAPA
- Journal Information:
- Proceedings, Annual Meeting, Air Pollution Control Association; (USA), Vol. 6; Conference: 80. annual meeting of the Air Pollution Control Association, New York, NY (USA), 21-26 Jun 1987; Other Information: Technical Paper 87-96.4; ISSN 0193-9688
- Country of Publication:
- United States
- Language:
- English
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CARBON MONOXIDE
AIR POLLUTION MONITORING
LEAD
OZONE
POLYCYCLIC AROMATIC HYDROCARBONS
BENZOPYRENE
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COMBUSTION PRODUCTS
PARTICULATES
PITTSBURGH
POLLUTION SOURCES
SEASONAL VARIATIONS
SULFATES
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FEDERAL REGION III
FEDERAL REGION IX
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ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
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PENNSYLVANIA
SULFUR COMPOUNDS
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540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)