site-specific environmental assessment no. n-3570 · pdf file site-specific environmental...

Click here to load reader

Post on 30-Jun-2020

0 views

Category:

Documents

0 download

Embed Size (px)

TRANSCRIPT

  • :

    :

    p c

    i i i

    UNITED STATES DEPARTMENT OF THE INTERIOR

    MINERALS MANAGEMENT SERVICE

    Gulf of Mexico OCS Region

    New Orleans, Louisiana

    FINAL

    S I T E - S P E C I F I C ENVIRONMENTAL ASSESSMENT

    No. N-3570

    Exploratory Activity

    High Island Area, East Addition,

    South Extension, Blocks A-373 and A-374

    LSSSSS OCS-G 7367 AND OCS-G 11405

    r 01)0* C0*

  • Commodity O i l and G l _ SEA Mo. N-3570

    United £ a* *s Department of tha I n t e r i o r Minerals Management Service

    Gulf of Mexico OCS Region New Orleans, Louisiana

    OCS SITE-SPECIFIC ENVIRONMENTAL ASSI TENT

    October 10, 1990

    Operator: Santa Tt I n t i m a t i o n s ! Corporation Plan Type: Plan ot Exploration Area: High H i and Aria. East Addition.

    South Extension. Blocks A-37 3 and

    J L e a s e : O C S - G 7367 AND O C S - G 11405 Date Submitted: Januarv 8. 1990

    Plan Commencement Date: Spring. UM

    J Prepared by Tad StlChnann

    Related Environmental Documents:

    F i n a l EIS f o r PCS Lease Sale Nos. 81. 84. 94. 98. 102 104. 105. 110. 112. 118. and 122

    EA NQS. 500. 504. 505. 506. 507. N-1730. N-1798. N-1845. N-1882. N-1S17. H-2.38. M-22QQ. N-22Q1. N-2624

    M-27S8. H-34Q3. and N-34Qtt,

    ArasvldS EA for Exploration and Production Act iv i t i e s within the Four-Mila zone ot tha E m and West Flower garden Panto

  • FINDING OF NO SIGNIFICANT IMPACT

    I have considered the Plan of Exploration for Santa Fe International Corporation

    (OCS-G 7367 and OCS-G 11405). SEA No. N-35?o. Based on the environmental

    analysis and aitigative aeasures contained In the s i te -speci f ic environmental

    assessnent, there is no evidence to indicate that the proposed action(s) will

    signif icantly (40 CFR 1508.27) affect the quality of the huaan environaent i f the

    penalt/applIcation is approved subject to a l l of the ait igative aeasures.

    Preparation of an environaental Impact stateaent Is net required.

    casino and Environaent Gulf of Mexico OCS Region

    I i 1990 Date

  • ABBREVIATIONS AND ACRONYMS

    AEA Areawide Environmental Assessment f o r E x p l o r a t i o n and Production A c t i v i t i a a within tha Pour-Mi l a Zona of tha Eaat and Meat Flower Cardan Banks

    CGA Clean Gulf Associates

    COE Corps of Engineers

    FWS U.S. Fiah and W i l d l i f e Sarvica

    GOM Gulf of Mexico

    H2S Hydrogen Sulf ide

    MMS Minerala Manageaent Sarvica

    NCSC Naval Coaatal systems Canter

    NEPA National Environaental Policy Act

    NPDES National Pollutant Diacharge Elimination system

    NTL Notice to Lessees and Operators

    OCS Outer Continental shelf

    POE Plan of Exploration

    SEA Si te-Speci f ic Environmental Assessment

    SER s i t s -Spec i f i c Environaental Raport

    USEPA U.S. Environaental Protection Agency

  • :

    a

    3

    9 I I I I I

    TABLE OF CONTENTS

    FINDING OF NO SIGNIFICANT IMPACT

    ABBREVIATIONS AND ACRONYMS

    INTRODUCTION

    I. DESCRIPTION OF PROPOSED ACTION

    A. GENERAL

    B. EQUIPMENT AND SUPPORT SYSTEMS

    C . SCHEDULE OF A C T I V I T I E S

    D. TRANSPORTATION ROUTES

    E . PERSONNEL REQUIREMENTS

    F . TECHNOLOGY

    G . CONTINGENCY PLANS

    H . DISCHARGES AND EMISSIONS

    1. Genera1

    2 . So l id Wastes

    3 . Liquid Maata

    4 . Gaseous Wastes

    I . STATE CERTIFICATION

    J . MEASURES FOR COMPLIANCE

    K. NEARBY PENDING ACTIONS

    I I . ALTERNATIVES TO THB PROPOSED ACTION

    I I I . DESCRIPTION OF THB AFFECTED ENVIRONMENT

    A. PHYSICAL ENVIRONMENT

    1. Environmental Geology and Hasarda a. General D e a c r i p t i o n of Geology b. P o t e n t i a l Geolog ic Hazards o. Petroleum Geology

  • 2. Meteorological Conditions S. Temperature b. Cloudinsss and V i s i b i l i t y c. Hind d. Prsc ip i ta t ion a. Savara Weather

    3. Physical Oceanography a. Saa Teaperature and S a l i n i t y b. Currents

    c. Tidaa and Sea Stata

    4. Watar Quality

    5. Air Quality

    B. BIOLOGICAL ENVIRONMENT

    1. Coastal Habitata

    2. Offshors Habitata a. Pelagic Environaent b. Benthic Environaent

    c. Seneitive Underwater Features

    3. Endangered or Threatened Spaciaa

    4. Breading Habitata and Migration Routaa

    5. Protected Araaa of Biological Routaa

    C . SOCI0EC0N0M1. CONDITIONS AND CONCERNS

    1. Economic and Demographic Conditiona

    2. Land Uaa

    3. Onahora Support Facllitiea

    4. Public Opinion

    5. Navigation

    6. Military Warning/Use Araaa

    7. Coaaarcial Fishing

    S. Recreation

    9. Cultural Raaourcaa

    10. Othar Coaaarcial Uses

    11. Othar Mineral Uses

    10 10

    10

    10

    10

    10

    1(

    II

    10

    1(

    V

    I :

    I :

    i :

    I :

    i i

    I t

    I :

    i :

    i i i :

    i I i I i I I

  • 12. Pipelines and Cablaa 11

    13. Ocean Duaping 11

    IV. ENVIRONMENTAL CONSEQUENCES 12

    A. ACCIDENTAL HYDROCARBON DISCHARGES 12

    1. O i l S p i l l A c c i d e n t s 12

    2. Vulnerabil ity of Coaatal Land Segaents to O i l Spi l l s 12

    3 . Assumptions about tha Character i s t ies and Fates of an Accidental O i l or Gaa Diacharge at the Fl.ovar Garden Banka 13

    4. Effects of O i l S p i l l s on the Environaent 13

    5. Oil S p i l l Containment/Cleanup Capabi l i t ies and

    Ef fectivaneaa 13

    B. IMPACTS CONCERNING THE PHYSICAL ENVIRONMENT 13

    1. lapacta Concerning Geology 13

    2. lapacta Concerning Meteorology 13

    3. Inpacts Concerning Phyaical Oceanography 13

    4. Impacta on Watar Quality 14

    5. Impacta on A i r Quality 14

    C . IHPACTS ON THE BIOLOGICAL ENVIRONMENT 14

    1. lapacta on Coaatal Habitata 15

    2. lapacta on Offshore Habitata 15 a. Iapacts on tha Pelagic Environaent 15 b. lapacta on tha Benthic Environaent 15 c. lapacta on Sensitive Undarvater Features 15

    3. Inpacta on Endangered or Thraatanad species 16

    4. Impacta on Branding Habitata and Migration Routaa 16

    5. lapacta on Protected Araaa of Biological Concern 16

    D. IMPACTS ON SOCIOECONOMIC CONDITIONS AND CONCERNS 16

    1. Impacta to Economic and Daaographic Conditiona 16

    2. lapacta on Land Uaa 16

  • 3. Inpacts o f C c n a t r u c t i o n of Onahora Support P a c i l i t i a a

    4. Inpacts of P u b l i c Opinion

    5. Inpacta on Navigat ion

    6. Inpacta Concerning M i l i t a r y Uaa

    7. Iapacts on Commercial F i s h i n g

    8. lapacta on R e c r e a t i o n / T o u r i s m

    9. Inpacta on C u l t u r a l Raaourcaa

    10. Iapacts on Other Commercial Uaea

    11. lapacta on Other Mineral Uaea

    12. Inpacta Concern ing P i p e l i n e s and Cablaa

    13. Inpacta of Ocean Dumping

    E . UNAVOIDABLE ADVERSE IMPACTS

    V. CONSULTATION AND COORDINATION

    V I . BIBLIOGRAPHY

    V I I . PREPARERS

    V I I I . APPENDICES

    A . LEASE STIPULATIONS

    B . REVIEWS FROM MMS

    C . REVIEWS FROM OTHER AGENCIES

    TABLE

    I - l Gaseous E m i s s i o n s

    FIGURE

    I - l Location of the Propoaad D r i l l S i t s and Bathymetry Map

    16

    16

    16

    17

    17

    17

    17

    11

    18

    18

    18

    18

    18

    19

    20

    21

    22

    21

    21

    :

    :

    :

    :

    :

    i B i i i i i

  • INTRODUCTION

    T h i s Site-Specif ic Environmental Assessment (SEA) , submitted in support of an Area-Wide Environaental Assessment (AEA), i s w icten for exploration a c t i v i t i e a propoaad for High Island Area, Ease Addit ion, South Extension, Blocks A-373 and A-374. The SEA contains s i t e - s p e c i f i c and updated information for the proposed action in Blocks A-373 and A-374 that i a not contained in the AEA. The SEA waa prepared using the AEA dated October 1984, ent i t led "Area-Wide Environmental Assessment for Exploration and Production Act iv i t i ea wi th in the Four-Mile Zona of tha Eaat and West Flower Garden Banks" aa a baaa document. Thia baae document can ba obtained through the Publ ic Recorda Office of tha Minerala Manageaent Service, Gulf of Mexico Region, Outer Continental Shelf O f f i c e . Those sections of the AEA that are referenced in the SEA ara indicated throughout the t e x t .

    I n compliance with the National Environaental Policy Act (NEPA) , thia AEA/SEA concept implements tha t i e r i n g process outlined in 40 CFR 1502.20 which ancouragaa agencies to t i e r environaental documenta to eliminate repet i t ive discussions of tha same issue. By use of reference to tha AEA, the SEA concentrataa on tha issues s p e c i f i c to tha proposed act ion. Tha SEA conforms to tha MMS and othar appropriate guide1ines for preparing environmental assessments in compliance with the requireaenta NEPA, uaing information praaentad in tha AEA.

    I . DESCRIPTION OF PROPOSED ACTION

    A. GENERAL

View more