Air pollution control district

E. A. Wolfe, Gas Flow Rate and Particulate Matter Determination of Gaseous Effluents, Bay Area Air Pollution Control District 1480, San Erancisco, Calif., 1961. 

Source Testing Manual, No. 434, Los Angeles Air Pollution Control District, Los Angeles, Calif., 1963. 

Hamming, W. J., P. P. Mader, S. W. Nicksic, J. C. Romanovsky, and L. G. Wayne. Gasoline Composition and the Control of Smog. Report of a Joint Study by Western CMl and Gas Association and Los Angeles County Air Pollution Control Db-trict. Los Angeles Air Pollution Control District, 1%1. 185 pp. 

One of the earliest organized efforts to acquire data on photochemical oxidants was that of the Los Angeles County Air Pollution Control District, which began in the middle 1950 s and has produced the largest data base now available for these studies. In 1%1, the California Department of Public Health set up a 16-station Statewide Cooperative Air Monitoring Network (scan). 

Birakos, J. N., Ed. 1974 Profile of Air Pollution Control Los Angeles Air Pollution Control District—County of Los Angeles, 1975. 91 pp. 

Dickinson, J. E. Air Quality of Los Angeles County. Technical Progress Report, Vol. 2. Los Angeles Los Angeles County Air Pollution Control District, 1%1. 290 pp. 

Agency Los Angeles County Air Pollution Control District (LAAPCD) State Division of Air Resources State Bureau of Air Resources Texas Air Control Board... 

Data are available back to 1963 from the downtown San Bernardino station operated by the county Air Pollution Control District (apcd). The colorimetric potassium io de method used to measure total oxidants was calibrated according to the method of the California Air Resources Board. A positive correction factor of 1.22 was used to adjust mountain data for the decreased air pressure at the higher elevation. 

To verify this hypothesis, low volume samplers have been operated in parallel with the air pollution control district s Km samplers. The samples collected were analyzed optically for elemental carbon and by the Gamma Ray Analysis of Light Elements (GRALE) technique for total carbon. These data were used to assess the concentration of elemental and total carbon aerosols present during the winter months in Los Angeles. It was established that the Km samplers can be calibrated to read elemental carbon concentrations. This calibration can be used to reconstruct historical elemental carbon levels at seven sites in Los Angeles. 

Nearly 23 years of hourly observations on particulate matter concentrations have been collected at downtown Los Angeles and at six other sites in the Los Angeles area using a tape sampler calibrated to read in Km units. The design of these samplers is as described by Hall (20). Ambient air is drawn through a one square-inch (5.07 cm ) area of filter paper at a rate of 25 ft per hour (11.8 1pm) for 51.5 min of each hour. The darkness of the spot developed on the filter is measured by the ratio of the intensity of the reflected light from clean white filter paper, R, to reflected light from the aerosol deposit, R. As used by tfie air pollution control district, the Km unit is related to reflectance by the formula (21). 

Holland, W.D. MacPhee, R.D., "Operating and Servicing the Chaney Aerosol Recorder " Los Angeles Air Pollution Control District Los Angeles, California, 1958. 

Stanislaus County Department of Environmental Resources Air Pollution Control District. Permit for Modesto Energy Company. Issued 3/9/88. Permit No. 4-025. 

Los Angeles County Air Pollution Control District data. 

Annual Report 2004 Moving Forward Santa Barbara County Air Pollution Control District Santa Barbara, CA, 2005. 

In areas where photochemical air pollution is a serious problem, the olefins and other more reactive hydrocarbons are major concerns rather than just with the total organic emissions. Using factors mainly derived by the Bay Area Air Pollution Control District in San Francisco (5), the total emissions of organic materials have been broken down to give an estimate of the reactive hydrocarbon emissions. About one-third, or about 27 X 10 tons, are considered reactive out of the 88 X 10 total tons of organic materials over half of the estimated reactive emissions result from automobile emissions. 

Bay Area Air Pollution Control District, San Francisco, unpublished emission... 

Research Laboratories (SRL) measurements (52, 53) and from other observation stations in the area. Station locations are indicated on Figure 15. Inversion data are deduced from airborne temperature measurements (52, 53) where possible and from morning soundings reported (80) by the Los Angeles County Air Pollution Control District (LAAPCD). Some wind data from the district s files have also been used. 

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