Texas Air Control Board

Chevron Permit AppHcations and Reports to the Texas Air Control Board for Alpha Olefins Plants NAOU-1791 and NAOU-1797, Chevron Research and Technology Co. 

The state of Texas controls chemical process ha2ards through its statute that estabUshed the Texas Air Control Board in 1965. In 1985, guidelines were estabUshed for evaluations of community impact of releases of 46 toxic chemicals, if Texas decides that a disaster potential exists (26). 

The chemical and solvent processes previously discussed remove acid ga from the gas stream but result in a release of H2S and CO2 when the solvent is regenerated. The release of H2S to the atmosphere may be limited by environmental regulations. The acid gases could be routed to an incinerator or flare, w hich would convert the HiS to SO2. The allowable rate of SO2 release to the atmosphere may also be limited by environmental regulations. For example, currently the Texas Air Control Board generally limits H2S emissions to 4 Ib/hr (17.5 tons/year) and SO2 emissions to 25 tons/year. There are many specific restrictions on these limits, and the allowable limits are revised periodically. In any case, env ironmental regulations severely restrict the amount of H S that can be vented or flared in the regeneration cycle. 

Durrenberger, C. Texas Air Control Board Report. 1974. Durrenberger, C.J. Texas Air Control Board. 1975 Wesley, R. A. The Cotton Ginners Journal and Yearbook 1975, 43 (1), 51-53. 

Houston (aqcr 216) Texas Air Control Board Deer Park 4515-60... 

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

The first and second highest annual average nickel concentrations in the air in Texas between 1978 and 1982, according to the Texas Air Control Board, were 49 and 34 ng/m at Port Arthur and Beaumont, respectively (Wiersema et al. 1984). The statewide 1978-1982 average was 1 ng/m. Mean nickel levels showed relatively little geographic variation in Ontario where concentrations in southern, central, and northern Ontario were 0.81, 0.91, and 0.58 ng/m, respectively (Chan et al. 1986). 

With analytical methods such as x-ray fluorescence (XRF), proton-induced x-ray emission (PIXE), and instrumental neutron activation analysis (INAA), many metals can be simultaneously analyzed without destroying the sample matrix. Of these, XRF and PEXE have good sensitivity and are frequently used to analyze nickel in environmental samples containing low levels of nickel such as rain, snow, and air (Hansson et al. 1988 Landsberger et al. 1983 Schroeder et al. 1987 Wiersema et al. 1984). The Texas Air Control Board, which uses XRF in its network of air monitors, reported a mean minimum detectable value of 6 ng nickel/m (Wiersema et al. 1984). A detection limit of 30 ng/L was obtained using PIXE with a nonselective preconcentration step (Hansson et al. 1988). In these techniques, the sample (e.g., air particulates collected on a filter) is irradiated with a source of x-ray photons or protons. The excited atoms emit their own characteristic energy spectrum, which is detected with an x-ray detector and multichannel analyzer. INAA and neutron activation analysis (NAA) with prior nickel separation and concentration have poor sensitivity and are rarely used (Schroeder et al. 1987 Stoeppler 1984). 

The Texas Air Control Board was responsible for monitoring emissions of hydrogen sulfide and sulfur dioxide during all phases of the Sulphlex construction The measurements indicated that neither gas was present at levels near those which would pose a safety or environmental hazard during any phase of the operation. 

---