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In cooperation with the Southern Division
Naval Facilities Engineering Command

Chemical Data for Bottom Sediment in Mountain Creek Lake, Dallas, Texas, 1999–2000

By Jennifer T. Wilson

U.S. Geological Survey
Open-File Report 02–053


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pdf (27.5 MB)


Contents

Abstract

Introduction

Purpose and Scope

Study Area

Acknowledgments

Chemical Data

Collection of Bottom-Sediment Samples

Analytical Methods and Results

Summary

References Cited

Figures

1.   Map showing location of the study area and approximate sampling locations in Mountain Creek Lake, Dallas, Texas
2.   Map showing chromium concentrations in surficial sediment samples collected during Phase III at Mountain Creek Lake, Dallas, Texas
3.   Graphs showing chromium concentrations relative to sediment deposition date in gravity core samples collected during Phase III at Mountain Creek Lake, Dallas, Texas
4.   Map showing total polychlorinated biphenyl (PCB) concentrations in surficial sediment samples collected during Phase III at Mountain Creek Lake, Dallas, Texas
5.   Graphs showing total polychlorinated biphenyl (PCB) concentrations relative to sediment deposition date in gravity core samples collected during Phase III at Mountain Creek Lake, Dallas, Texas
6.   Map showing total polycyclic aromatic hydrocarbon (PAH) concentrations in surficial sediment samples collected during Phase III at Mountain Creek Lake, Dallas, Texas
7.   Graphs showing total polycyclic aromatic hydrocarbon (PAH) concentrations relative to sediment deposition date in gravity core samples collected during Phase III at Mountain Creek Lake, Dallas, Texas

Tables

1.   Thickness of lacustrine sediment samples in cores collected from Mountain Creek Lake, Dallas, Texas
2.   Description of gravity cores collected from Mountain Creek Lake, Dallas, Texas
3.   Box cores—Major and trace element concentrations in bottom sediments
4.   Box cores—Organochlorine pesticide and polychlorinated biphenyl (PCB) concentrations in bottom sediments
5.   Box cores—Polycyclic aromatic hydrocarbon (PAH) concentrations in bottom sediments
6.   Box cores—Grain size in bottom sediments
7.   Gravity cores—Major and trace element concentrations in bottom sediments
8.   Gravity cores—Organochlorine pesticide and polychlorinated biphenyl (PCB) concentrations in bottom sediments
9.   Gravity cores—Polycyclic aromatic hydrocarbon (PAH) concentrations in bottom sediments
10.   Gravity cores—Grain size in bottom sediments
11.   Gravity cores—Cesium-137 (137Cs) activity in bottom sediments
12.   Laboratory quality-control samples for major and trace element analyses
13.   Laboratory quality-control samples for organochlorine pesticide and polychlorinated biphenyl (PCB) analyses
14.   Laboratory quality-control samples for polycyclic aromatic hydrocarbon (PAH) analyses

Abstract

Mountain Creek Lake is a reservoir adjacent to the Naval Weapons Industrial Reserve Plant and the former Naval Air Station in Dallas, Texas. The U.S. Geological Survey began studies of water, sediment, and biota in the reservoir in 1994 after a Resource Conservation and Recovery Act Facility Investigation detected concentrations of organic chemicals on both facilities. Additional reservoir bottom sediment samples were collected during December 1999–January 2000 at the request of the Southern Division Naval Facilities Engineering Command to further define the occurrence and distribution of selected constituents and to supplement available data. The U.S. Geological Survey National Water Quality Laboratory analyzed bottom-sediment samples from 16 box cores and 5 gravity cores for major and trace elements, organochlorine pesticides, polychlorinated biphenyls, polycyclic aromatic hydrocarbons, grain size, and cesium-137.



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