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TNRCC MOBILE MONITORING STUDIES THAT DEMONSTRATED EXCEEDENCES OF
HEALTH-BASED EFFECTS SCREENING LEVELS OR STATE REGULATORY STANDARDS AT INDUSTRIAL FACILITIES,
JANUARY 1994 -- May 1997
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INDUSTRY AND CITY
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CHEMICALS EXCEEDING ESLs
OR STANDARDS
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DATE
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Formosa Plastics, Point Comfort
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Ethylene Dichloride, Vinyl Chloride
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Jan 1994
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CITGO/Southwestern, Corpus
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Benzene
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Feb 1994
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Coastal East, Corpus Christi
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Benzene
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Feb 1994
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Valero, Corpus Christi
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Sulfur dioxide, Hydrogen sulfide
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Feb 1994
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Gibralter Chemical, Winona
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Benzene
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Nov 1994
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Chevron, ASARCO, El Paso
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Benzene
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Jan 1995
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ASARCO, El Paso
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SO2
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Feb 1995
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Rexene Corporation, Odessa
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Benzene
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May 1995
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International Bridges, Laredo
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Carbon monoxide, Benzene, Alkenes, Alkanes
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June 1995
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Western Iron Works, San Angelo
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Benzene
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July 1995
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Amoco Oil, Texas City
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Benzene
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Aug 1995
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Coastal Products, Houston (1)
Channel Refining, Houston
Platzer Shipyard, Houston
Joe Hughes, Houston
Merichem, Houston
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Benzene, Cresol, Formalydehyde
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Oct 1995
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CITGO, Corpus Christi
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Sulfur dioxide, Benzene, Hydrogen sulfide
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Dec 1995
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Valero, Corpus Christi
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Hydrogen sulfide
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Dec 1995
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Formosa Plastics, Point Comfort
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Ethylene dichloride, Chloroform
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Jan 1996
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Fina Oil & Chemical, Big Spring
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Hydrogen sulfide
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Jan 1996
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Shell Western, Denver City (2)
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Alkanes
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Jan 1996
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Coastal Refining, Corpus Christi
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Benzene
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Feb 1996
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GM Trading Co., San Antonio
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Hydrogen sulfide
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Apr 1996
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Koch Refining, San Antonio
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Benzene, Alkanes, Alkenes, Isopentane
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Apr 1996
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City Public Services, San Antonio
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Phenanthrene, Flouranthene, Pyrene
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Apr 1996
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Gifford Hill, San Antonio
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Total particulate matter
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Apr 1996
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BFI Landfill, San Antonio
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Alpha-methyl styrene
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May 1996
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Huntsman Corp, Port Arthur
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Benzene
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May 1996
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Huntsman C4 Corp, Port Neches
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1,3-Butadiene
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Aug 1996
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Ameripol Synpol, Port Neches
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1,3-Butadiene
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Aug 1996
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Ameripol Synpol, Port Neches
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1,3-Butadiene
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Oct 1996
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Huntsman C4 Corp, Port Neches
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1,3-Butadiene
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Oct 1996
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Source: Texas Natural Resource Conservation Commission, Toxicology & Risk Assessment Section, Office of Air Quality, 1997
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Notes: (1) The mobile monitoring study conducted in October 1995 in Houston
revealed elevated levels downwind of the facilities mentioned. It is not possible, however, to determine from the monitoring to what extent each individual
facility contributed to these exceedences of health-based screening levels.
(2) It was not possible to determine from the mobile monitoring study that found
exceedences of health-based levels for alkanes in January 1996 downwind of Shell Western in Denver City if the alkanes originated from Shell Western or other
industries in the area.
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