| Main Title |
Occurrence of and Trends in Selected Sediment-Associated Contaminants in Caddo Lake, East Texas, 1940-2002. |
| Author |
Wilson, J. T. ;
|
| CORP Author |
Geological Survey, Austin, TX.;Environmental Protection Agency, Dallas, TX. Region VI. |
| Publisher |
2003 |
| Year Published |
2003 |
| Report Number |
USGS-WRIR-03-4253; |
| Stock Number |
PB2004-104414 |
| Additional Subjects |
Sediments ;
Contamination ;
Quality assurance ;
Toxicity ;
Trends ;
Age estimation ;
Cores ;
Tracer techniques ;
Biota
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB2004-104414 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
one CD-ROM contains 96 page document |
| Abstract |
The purpose of this report is to describe the occurrence of and trends in selected sediment-associated contaminants in age-dated sediment cores from four sites in the Texas part of Caddo Lake. Radionuclides were used to age date the sediment layers in the cores, which makes possible evaluation of changes in contaminant concentrations over time. The report explains the age-dating process and associates dates of deposition with successive intervals in each core. Concentrations of selected organochlorine compounds, polycyclic aromatic hydrocarbons (PAHs), and trace elements are compared to sediment-quality guidelines that reflect relative sediment toxicity to aquatic biota. Trends based on contaminant concentrations in intervals of core sediment were tested for statistical significance. Potential sources of contaminants, particularly mercury, are discussed. |
| Supplementary Notes |
This document is color dependent and/or in landscape layout. It is currently available on CD-ROM and paper only. CD-ROM contains a 96 page document. Sponsored by Environmental Protection Agency, Dallas, TX. Region VI. |
| Availability Notes |
Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| NTIS Title Notes |
Water-resources investigations. |
| Category Codes |
68D; 48G |
| NTIS Prices |
AV A06 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
020000770 |
| Origin |
NTIS |
| Type |
CAT |
