Profiles of Selected Pollutants in Bayou Texar, Pensacola, FL

1,01

MB

85

stron

5955

ID

University of West Florida

2005

rok

Table of contents

EXECUTIVE SUMMARY

1. INTRODUCTION .1

2. STUDY AREA 2

2.1. Description 2

2.2 Clean Water Act Classification 3

3. ENVIRONMENTAL HISTORY OF BAYOU TEXAR .3

3.1 Pre 1990.3

3.2 20th Century 3

3.3 Bathymetry and Sedimentation of the Bayou/Creek System .4

4. Current Public Works Activities 8

4.1 Sediments .8

4.2 Stormwater .9

4.2.3 Shore Erosion 10

5. NATIONAL PRIORITIES LIST SITES .11

5.1 Public Perception of Superfund Site Impacts.11

5.2 ACC and ETC National Priorities List Sites 11

6. CONTAMINANTS OF CONCERN, LITERATURE REVIEW 12

6.1 Sediments .12

6.2 Nutrients .13

6.3 Fluoride .14

6.4 Radium 14

6.5 Semivolatiles 16

6.5.1 Polycyclic Aromatic Hydrocarbons (PAHs).16

6.5.2 Dinitrotoluene (DNT).17

6.5.3 Organochlorine Contaminants of Concern 17

6.6 Dioxins 18

6.6.1 Dioxins at ETC 18

6.7 Polychlorinated Biphenyls (PCBs) 19

6.8 Pesticides 19

6.9 Heavy Metals .20

6.10 Bacteria 21

7. OBJECTIVES 21

8. METHODS 22

9. RESULTS AND DISCUSSION 24

9.1 Gaps in existing data 24

9.2 Bathymetry .25

9.3 Fluoride in Porewater .25

9.4 Fluoride in Sediments 26

9.5 Fluoride in Bayou Bottom Water .27

9.6 Existence of 2nd Fluoride Hot Zone .28

9.7 Radium 28

9.7.1 Radium Activities 28

9.7.2 Radium Origin in The ACC Aquifer .29

9.7.3 Radium in Bayou Sediments 31

9.7.4 Bayou Texar Sediments and the Hagler Well 31

9.8 Semivolatile Compounds .32

9.8.1 Distribution of Semivolatiles in Sediments .32

9.8.2 Total Petroleum and PAHs 33

9.8.3 PAH Ratios and PAH Origin .33

9.8.4 Naphthalene Discharge to Bayou .34

9.8.5 Dinitrotoluene (DNT), Phthalates and Carbazole 35

9.9 Polychlorinated Biphenyls (PCBs) 36

9.10 Pesticides 36

9.11 Metals 37

9.12 Bacteria 38

10. REMEDIAL CONSIDERATIONS .39

10.1 Erosion and Sedimentation 39

10.2 Pollution Concerns .40

11. SUMMARY AND CONCLUSIONS 42

12. REFERENCES 44

13. APPENDIX 1: TABLES.51

14. APPENDIX 2: MAPS.73

15. APPENDIX 3: CORE DESCRIPTIONS, PHASE 2123

16. APPENDIX 4: PHOTOGRAPHS.129