Contaminant survey of the San Bernard National Wildlife Refuge, Brazoria County, Texas

Metadata Updated: May 11, 2018

The San Bernard National Wildlife Refuge is located approximately 10 miles south of a major industrial complex at Freeport, Texas, and is connected to this complex by the Gulf Intracoastal Waterway (GIWW), a canal used primarily for barge traffic. The potential for spills of oil and chemicals is high in this waterway, as is contamination from urban runoff from Freeport, Texas, and waste discharges from the industrial complex. Data from this survey does not indicate any contamination by organochlorine or organophosphate pesticides is occurring at this time on the San Bernard National Wildlife Refuge. Two heavy metals, cadmium and chromium, had elevated residue levels in the sediment and oyster samples collected from Cow Trap Lake, the estuarine portion of the refuge. The presence of these two metals may indicate some contamination from the Freeport, Texas area is being transported south along the GIWW. These metals were not at high enough levels to evoke action at this time, but future monitoring for heavy metals is recommended to detect if a trend toward increased contamination is evident. Petroleum hydrocarbons were also detected at elevated levels in sediment and oyster samples collected in Cow Trap Lake. These residues probably reflect the petroleum spills that occur in the GIWW as well as the minor oiling that occurs from small outboard motors on the numerous fishing boats that utilize the GIWW and Cow Trap Lake. The freshwater portion of the refuge is apparently free from contamination. The small reserve pit at the gas well on the Big Boggy unit is contaminated with lead and petroleum hydrocarbons. The lead does not appear to be in a bioavailable form presently. This pit should, however, be drained, dried, and plowed to a depth of eight inches in order to bioremediate the hydrocarbons. This would also make the lead even less available to natural resources.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date December 2, 2017
Metadata Updated Date May 11, 2018

Metadata Source

Harvested from DOI CKAN Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Created Date December 2, 2017
Metadata Updated Date May 11, 2018
Publisher Fish and Wildlife Service
Unique Identifier FWS_ServCat_23074
Brent Frakes
Maintainer Email
Public Access Level public
Bureau Code "010:18"
Metadata Context
Metadata Catalog ID C:\Program Files (x86)\FWS\DataStore\Application\OpenData\FWS_ServCat_v1_1.json
Schema Version
Catalog Describedby
Data Quality true
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Harvest Object Id 895d1413-baf5-4622-8526-88e86c910a17
Harvest Source Id 9364572a-43e2-4cb5-a0ee-589c8af0e137
Harvest Source Title FWS-servecat
Data First Published 1993-09-01
Homepage URL
Data Last Modified 1993-09-01
Program Code "010:094", "010:028"
Related Documents ""
Source Datajson Identifier true
Source Hash 648ca6fb0bfdf1dccd87c6a7c9ed1f0ec51a5506
Source Schema Version 1.1
Spatial -96.31697,28.5777054,-95.0612259,29.6094189
Category "Unpublished Report"

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