OCS EI S / E A BOE M 2014

- 1004



# Proposed Rule for Oil and Gas Exploration Drilling Activities on the Arctic Outer Continental Shelf for 30 CFR Part s 250 , 254, and 550

Draft Environmental A ssessment

U.S. Department of the Interio r Bureau of Ocean E n er g y Management Bureau of Safety and Environmental Enforcement Herndon, VAT his page is intentionally blank

.OCS EI S / E A BOE M 2014

- 1004



# Proposed Rule for Oil and Gas Exploration Drilling Activities on the Arctic Outer Continental Shelf for 30 CFR Parts 250, 2 54, and 550

Draft Environmental Assessment

Author

Bureau of Ocean Energy Management Division of Environmental Assessment

Published by

U.S. Department of the Interior Bureau of Ocean Energy Management Division of Environmental Asses sment February 2015i 

## Contents

**Contents**

**________________________________ ____________________________**  **i**
**List of Figures**

**________________________________ _______________________**  **ii**

**List of Tables**

**________________________________ ________________________**  **ii**
**Acronyms and Abbreviations**

**________________________________ __________**  **iii**

**1.0 Introduction** 

**________________________________ ____________________**  **1**

1.1 Background and Overview

________________________________ ____________ 1

1.2 Purpose and Need

________________________________ ___________________ 2

**2.0 Proposed Action and**  **Alter natives** 

**________________________________ __**  **2**

2.1 Alternative A

– Proposed Action Alternative (PAA)

________________________ 2

2.2 Alternative B

– Proposed Rulemaking Excluding the Requirem ent for More Frequent Blowout Preventer Testing

________________________________ __________ 3

2.3 Alternative C

– No Action Alternative (NAA)

______________________________ 3

2.4 Alternative Considered But Not Analyzed

________________________________ 3

**3.0 Geographic Areas** 

**________________________________ _______________**  **3**

**4.0 Affected Environment** 

**________________________________ ____________**  **4**

4 .1 Air Quality

________________________________ __________________________ 5

4.2 Water Quality

________________________________ _______________________ 5

4.3 Marine Benthic and Pelagic Habitats

________________________________ ____ 6

4.4 Invertebrates and Lower Trophic Levels

________________________________ _ 7

4.5 Essential Fish Habitat (EFH) and Fish

________________________________ ___ 7

4.6 Marine and Coastal Birds

________________________________ _____________ 8

4.7 Marine Mammals

________________________________ ____________________ 9

4.8 Subsistence

________________________________ _______________________ 13

4.9 Sociocultural Resourc es

________________________________ _____________ 14

4.10 Health Status of Alaska Natives in the North Slope Borough

_______________ 15

4.11 Environmental Justice

________________________________ _______________ 15

**5.0 Environmental Consequences** 

**________________________________ ____**  **15**

5.1 Alternative A

– Proposed Action Alternative (PAA)

_______________________ 15
5. 1.1 Provisions That Would Not Cause Environmental Impacts

________________________ 16 5.1.2 Operational Provisions Analyzed

________________________________ ____________ 17 5.1.3 Environmental Analysi s of Operational Provisions

_______________________________ 18 5.1.4 Effects Summary

________________________________ _________________________ 35

5.2 Alternative B

– Proposed Rulemaking Excluding the Requirement for Moreii Frequent Blowout Preventer Testing

________________________________ _________ 35

5.3 Alternative C

– No Action Alternative (NAA)

_____________________________ 35

**6.0 Literature Cited** 

**________________________________ ________________**  **37**

**7.0 Preparers** 

**________________________________ _____________________**  **38 Appendix A. Regulatory Provisions of the Proposed Rule (Version 2.9.15)** 

**____ 39** 
**Appendix B. Level of Effect Definitions**

**________________________________ __**  **64** Air Quality

________________________________ ________________________________ _____ 64 Water Quality

________________________________ ________________________________ __ 64 Coastal, Benthic, and Pelagic Habitats

________________________________ ______________ 65 Lower Trophics

________________________________ ________________________________ _ 66 Fish and EFH

________________________________ ________________________________ __ 66 Marine and Coastal Birds

________________________________ _________________________ 66 Marine Mammals

________________________________ _______________________________ 67 Sociocultural Systems

________________________________ ___________________________ 68 Subsistence

________________________________ ________________________________ ___ 69



## List of Figures

Figure 1. Alaska OCS Planning Areas

................................ ................................ ............ 4



## List of Tables

Table 1. Arctic Marine Mammals

................................ ................................ ..................... 9iii 

## Acronyms and Abbreviations

AAQS Ambient Air Quality Standards APD Application for Permit to Drill APM Application for Permit to Modify bbl barrel ( s) BOEM Bureau of Ocean Energy Management BOP Blowout P reventer BSEE Bureau of Safety and Environmental Enforcement CFR Code of Federal Regulations EA Environmental Assessment
EFH Essential Fish Habitat
EP Exploration Plan ESA Endangered Species Ac t of 1973 IOP Integrated Operations Plan km mi kilometer (s) mile(s)
N A A No Action Alternative NAAQS National Ambient Air Quality Standards NEPA National Environmental Policy Act of 1969 NMFS National Marine Fisheries Service NO X nitrogen oxide s NPD ES National Pollutant Discharge Elimination System MODU Mobile Offshore Drilling Unit OCS Outer Continental Shelf PAA Proposed Action Alternative PEIS Programmatic Environmental Impact Statement SCCE Secretary Source Control and Containment Equipment Secretary of the U nited S tates Department of the Interior SEMS Safety and Environmental Management System USDOI United States Department of the Interior USCG USEPA United States Coast Guard United States Environmental Protection Agency VOCs V olatile O r ganic C ompounds1 

## 1.0 Introduction

Pursuant to the National Environmental Policy Act of 1969 (NEPA), t his environmental assessment (EA) was prepared to determine if the proposed promulgation of a rule for oil and gas exploration drilling activities on the Arctic Outer Continental Shelf (OCS) would have a significant effect on the human environment

.



### 1.1 Background and Overview

The Outer Contine n tal S helf Lands Act (OCSLA) dir e cts the Secretary of t h e U.S. Department of the Interior ( Secretary, US DOI) to m an age the orderly leasing, exploration, develop m ent, and production of m i neral resources on the OCS. T h e Secretary h as delegated to the Bureau of Ocean Energy Management (BOEM) the respo n sib ility for overseeing certain aspects of the OCS oil and gas program , including, among other things, manag ement of the leasing program, administration of exploration and development plans, environmental studies and analyses under NEPA, resource evaluation, and economic analyses . T h e Secretary h as delegated to the Bureau

o f Safety and Environmental Enforcement (BSEE) the respo n sibility for the development, oversight, and enforcement of safety and environmental standards for offshore energy and mineral operations. BSEE’s activities include i ssuance and monitoring of permits related to drilling

, well workover activities

, production, development and measurement operations

, pipelines

, the inspection of offshore structures and facilities

, monitoring of environmental hazards

, and the mitigation of safety and environmental risks. BOEM and BSEE discharge their responsibilities within the context of several relevant statutory and regulatory regimes

, as well as executive orders and other polic y guidance

. Of particular note here

, BOEM and BSEE have promulgated extensive regulations g overning oil and gas exploration activities on the OCS at Title 30 Code of Federal Regulations ( CFR ) Parts 250, 254, and 550.

The proposed rule is informed by the measures required by BOEM and BSEE of Royal Dutch Shell [Shell] during exploration drilling of the Burger and Sivulliq/Torpedo prospects in the Chukchi and Beaufort Seas in 2012, USDOI’s subsequent review of Shell’s 2012 operations (USDOI, BOEM, and BSEE, 201 3 ) , engagement with Arctic partners and stakeholders, and consideration of the developme nt of potential domestic energy resources from the Arctic OCS.

The proposed rule is designed to enhance BSEE’s and BOEM’s abilities to fulfill th eir regulatory responsibility on the Arctic OCS, consistent with the added challenges associated with explorat ory drilling activities in that environment. The proposed rule would a m end and add new provisions for exploratory drilling on the Arctic OCS designed to: (a) prevent pollution; (b) reduce the chance of oil spills occurring; (c) reduce the size and duratio n of any spills that do occur; (d) enhance the effectiveness of spill response; (e) improve operational planning; and

, (f) enhance overall operational safety. In addition, this proposed rule would also help protect the Arctic ecosystems as well as the s ubsistence needs, culture and traditions of Alaska Native communities, while achieving the National Arctic Strategy goal of reducing reliance on imported2 oil and strengthening National energy security.



### 1.2 Purpose and Need

The purpose of this proposed action i s to improve safe ty, operator performance, environmental safeguards , and protection of Alaska Native subsistence activities

, cultural traditions , and the Arctic ecosystem during exploratory drilling operations on the A rctic OCS (e. g. , the Beaufort Sea and Chukchi Sea Planning Areas)

.

The proposed action is needed to address the operat ional challenges, safety concerns , and environmental and sociocultural risks unique to Arctic OCS exploration drilling, ecosystem, and subsistence practices. The Arctic OCS is known for its challenging environmental conditions, geographic remoteness, and relative lack of existing infrastructure. BOEM and BSEE have undertaken an extensive environmental and safety review of potential oil and gas operations in the Arctic region ( US DOI, BOEM

, and BSEE

, 2013)

. Arctic OCS operations can be complex, and there are substantial challenges and operational risks throughout every phase of an exploratory drilling program. Accordingly, BOEM and BSEE have concluded that new and enhanced re gulations , providing greater clarity and specificity, are necessary and appropriate for Arctic OCS operators who propose to conduct exploratory drilling activities in this unique environment

.



## 2.0 Proposed Action and Alternatives

This section presents and compares alternatives analyzed and also provides the rationale for why another alternative was considered

, but not analyzed by BOEM and BSEE

.



### 2. 1 Alternative A

– Proposed Action Alternative (PAA)

The P roposed A ction A lternative (PAA) is to prom ulgate new regulat ions applicable to exploration drilling activities on the A rctic OCS. BOEM and BSEE are proposing a rule that revises and creates additional regulatory provisions , specifically tailored to exploratory drilling under Arctic OCS conditions

. These new regulations are intended to enhance safety and to reduce the environmental and sociocultural impacts of these activities. Under this alternative, the provisions outlined in the proposed rule (Appendix A) w ould be promulgated in a final rule. The proposed rule would modify the regulations under 30 CFR Part s 250, 254, and 550, to include new and revised sections that clarify existing requirements and incorporate new and i m proved planning, drilling

, and safety requirements

. Section 5. 1 and Appe ndix A provide more detailed descriptions of the proposed rule

. The proposed rule would apply only to exploratory drilling activities on the Arctic OCS.3 

### 2. 2 Alternative B

– Proposed Rulemaking Exclud ing the Requirement for More Freque n t Blowout P reventer Testing

Alternative B is the same as the PAA , except that it would only require a B lowout Preventer (BOP) pressure test for exploratory drilling operations every 14 days

, as currently required by the existing regulations (30 CFR 250.447)

, rather than every 7 day s as proposed under the PAA

. All other provisions of the PAA would be proposed under Alternative B

.



### 2.3 Alternative C

– No Action Alternative (NAA)

Under th e N o A ction A lternative (NAA) , the proposed rule would not be implemented. The

e xisting rules at 30 CFR Parts 250, 254, and 550 would remain in place, unaltered.



### 2.4 Alternative Considered B ut N ot Analyzed

BOEM and BSEE also considered an other alternative that would eliminate the following provisions of the proposed rulemaking

.

§ 2 50.300 Pollution prevention. § 250.471 What are the requirements for Arctic OCS source control and containment? § 250.472 What are the relief rig requirements for the Arctic OCS?

Exclusion of those provisions would avoid the possible modest environmen tal impacts from the additional vessels and equipment that would be required for compliance with the proposed provisions. Exclusion of those provisions also would result in potential cost savings for OCS operators compared to the cost of compliance with t he same provisions

. However, such an alternative would fall far short of meeting the purpose and need of the proposed rule. Absent the precautionary provisions to reduce pollution potential, reacquire control of and contain a loss of well control, and re duce the time necessary to mobilize and drill a relief well, the proposed rule would not yield the targeted degree of enhancements compared to the NAA. Therefore, BOEM and BSEE did not undertake a more detailed analysis of this alternative.



## 3.0 Geograph ic Areas

The proposed rule applies to exploration drilling activities in the Chukchi Sea and Beaufort Sea Planning Areas of the Arctic OCS (see Figure 1 )

. Before an OCS operator may propose exploratory drilling, a n operator first needs a valid lease or l eases

. Thereafter, exploration drilling may occur only under an approved exploration plan (EP) and application for permit to drill (APD)

. As of December 2014, t here were 607 active leases i n t he Chukchi Sea and Beaufort Sea Planning Areas.4 Figure 1

. Alaska OCS Planning Areas

Every five years, BOEM releases a schedule of oil and gas lease sales indicating the size, timing, and location of proposed leasing activity that the Secretary determines will best meet national energy needs for the five

- year per iod following its approval. Only the Chukchi Sea

, Beaufort Sea , and Cook Inlet Planning A reas are included in the 2012

- 2017 Outer Continental Shelf Oil & Gas Leasing Program (Five Year Program)

. Currently, there are no active Alaska OCS leases outside of the Beaufort Sea and Chukchi Sea Planning Area s

.
The current Five Year Program does have a lease sale scheduled for the Cook Inlet Planning Area. The propose d rule, however, does not apply to activities in the Cook Inlet Planning Area, because the Co ok Inlet OCS typically does not have the same degree of harsh, cold, frozen, and ice conditions as the Arctic OCS. T hese conditions in the Arctic make exploration operations

more difficult and prone to certain types of accidents

, which the proposed rule i s specifically designed to prevent or minimize

. Furthermore , the Arctic OCS is more remote from infrastructure, ports , and facilities needed in case of emergencies

, and these factors necessitate the stringent requirements in the proposed rule

. 

## 4 .0 Affected Environment

The environmental and sociocultural resources present in the Beaufort Sea and Chukchi S ea P lanning A reas are briefly described below. This EA incorporates by reference and summarizes relevant information from the Outer Continental Shelf Oil & Gas Leasing Program: 2012

- 2017, Final Programmatic Environmental Impact Statement [Five Year PEIS] (USDOI, BOEM, 2012 )

. P age numbers from this principal reference are provided in parentheses

.5 

### 4.1 Air Q uality

There are few industr ial emission sources in Alaska, and (outside of Anchorage and Fairbanks) no sizable population centers. Barrow

– with a year 2010 population of about 4,200

– is the largest community in North Slope Borough, which borders the Beaufort Sea and Chukchi Sea
P lanning Areas. The existing air quality in Alaska is considered to be relatively pristine, with pollutant concentrations in most areas well within the National Ambient Air Quality Standards (NAAQS). The primary industrial emissions in Alaska are associat ed with oil and gas production, power generation, small refineries, paper mills, and mining.

The Arctic region experiences air pollution problems due to long

- range transport of air pollutants from industrial northern Eurasia and North America, including Arctic haze followed by acidic depositions, tropospheric ozone, and buildup of toxic substances such as mercury or persistent organic compounds. Local shipping emissions and summertime boreal forest fires also may be important pollution sources in the Ar ctic. In addition, large haze events in the Arctic can be caused by Asian dust originating from the Gobi and Taklamakan Deserts in Mongolia and northern China in springtime (pp. 3

- 66, 3

- 67, and 3

- 388).

Over most of the onshore areas bordering the Chukchi Sea and Beaufort Sea Planning Areas, there are only a few small, widely scattered emission sources. The only major local sources of industrial emissions are in the Prudhoe Bay

- Kuparuk

- Endicott

- Alpine oil production complex. With few industrial emission s ources , the region is well within the NAAQS and State of Alaska Ambient Air Quality Standards (AAQS). This demonstrates ambient pollution concentrations are within both national and S tate standards

, including areas subject to relatively higher emissions.



### 4. 2 Water Q uality

In Alaska there are several seasonal or occasional natural events that contribute to water quality and to which natural systems are adapted. Examples of these events include hydrocarbons from natural oil seeps, sediment from natural coa stal erosion, sediment derived from glacial

- fed rivers, natural levels of nutrients from river flooding, metals from river sediments, volcanic eruptions, and rock erosion (p. 3

- 42)

.
Water quality on the Alaska OCS has received relatively little contribu tion from the more common land

- based and marine anthropogenic pollution found in the l ower 48 S tates. The rivers that originate in Alaska and flow into coastal marine waters remain fairly unpolluted by human activities. Industrial and shipping impacts on water quality have been and are relatively low at this time, with some notable exceptions such as the Exxon Valdez oil spill in 1989 . There are

, however, several sources of anthropogenic contaminants in the Alaska marine environment. They enter the A rct ic marine ecosystem through atmospheric deposition, discharges to the sea, drifting sea ice, or directly from accidental or in tentional dumping of pollutants (p. 3

- 42)

.
In both the Chukchi and Beaufort Seas, water quality is relatively pristine. One of t he contributing factors is the limited municipal and industrial activity proximate to these s eas.6 Degradation of water quality, where it occurs in the Arctic, is related largely to aerosol deposition and localized anthropogenic pollution from, for example , mining facilities and former military facilities (p. 3

- 45)

.
Background hydrocarbon concentrations in Beaufort Sea waters appear to be biogenic and on the order of less than 1 part per billion . No seafloor oil seeps have been identified in the Beaufor t Sea; however, naturally occurring oil seeps have been identified onshore above the low

- tide line along the coast of the Beaufort Sea. Recent studies of sediments in Beaufort Lagoon, located in the eastern portion of the A rctic coast, have indicated that no anthropogenic hydrocarbon or metals contamination exists. These sediment data will serve as a baseline against which to evaluate impacts to nearshore sediments from anthropogenic activities. Hydrocarbon concentrations in sediments of the Beaufort Sea are relatively high compared with other nonpolluted marine areas; however, examination of sediment cores gives little indication that oil and gas activities in the area have measurably contaminated the sediments (pp. 3

- 47 and 3

- 48)

.
Considering the limit ed sources of anthropogenic input to the area, concentrations of hydrocarbons in the Chukchi Sea are expected to be at background levels. As with the Beaufort Sea, no seafloor oil seeps have been identified in the Chukchi Sea (pp. 3

- 47 and 3

- 48)

.



### 4. 3 Mar ine B enthic and P elagic H abitats

Most of the se afloor of the Beaufort Sea and the Chukchi Sea shelves consists of a soft

- bottom plain composed of silt, clay, and sand. Deposits of flocculated particles from plankton blooms, epontic organisms, and ice alg ae from ice retreat all contribute to the bottom sediments in these regions. Disturbance from sea

- ice scour is a dominant process affecting the seafloor of the Beaufort Sea and the Chukchi Sea shelves. Deep keels of icebergs moving across the shelf scour sediments, causing chronic disturbance to benthic communities. Strudel (drainage of large volumes of freshwater through the i ce at holes and cracks) scours the seafloor and occurs near the mouths of rivers during spring flood periods. Few species inhabi t the seafloor in waters shallower than 2 m eters (6.6 f ee t) deep because of the bottom

- fast ice, which prohibits overwintering of most organisms.

This nearshore benthic area is recolonized each summer, mainly by mobile, opportunistic, epifaunal crustacea ns ( e.g., amphipods, mysids, cumaceans, and isopods), which are fed on primarily by waterfowl and fishes. In slightly deeper water, the gouging of the seafloor by ice keels creates a habitat for opportunistic infauna (e.g., small clams and other invertebr ates), which are fed on by seabirds, fishes, and walrus. Surveys on the Chukchi Shelf revealed that tunicates, echinoderms, jellies, crabs, polychaetes, and sponges make up most of the benthic biomass. Common fish on soft sediments included Arctic cod ( B oreogadus saida ), Pacific herring ( Clupea pallasii ), sculpins, and pollock ( Theragra chalcogramma ). Sections 3.8.4.3 and 3.8.5.3 of the Five Year PEIS provide further descriptions of fish and invertebrate communities (p. 3

- 134)

.
Pelagic habitat in the Be aufort/Chukchi Shelf Marine Ecoregion consists of ice

- free open water and high

- productivity areas of open water surrounded by sea ice ( i.e., polynyas). Productivity in the water column is primarily controlled by temperature, nutrients, light, and the amou nt of sea7 ice in a given year. Phytoplankton productivity is highest in the summer when temperatures are highest and when nutrient and solar irradiance are most conducive to productivity. Phytoplankton productivity gradually decreases from the southwester n Chukchi Sea to the east to the Beaufort Sea (especially east of Point Barrow) and from inshore to offshore areas, although there are isolated mid

- shelf upwelling regions where productivity is higher than it is in the surrounding water (p. 3

- 144)

.



### 4. 4 In vertebrates and L ower T rophic L evels

At the lowest invertebrate trophic levels, microbes such as bacteria and protists are known to be important in Arctic waters for breaking down and recycling nutrients and organic matter. Cilliates and dinoflagellates d ominate the microzooplankton biomass in the Chukchi Sea, but their role in the Beaufort and Chukchi Seas is not well studied. The most common water column macroinvertebrates in the Arctic are the copepods (typically Pseudocalanus ). In the Chukchi Sea, mu ch of the copepod biomass originates in the Bering Sea, while true Arctic species are most common in the Beaufort Sea. Riverine inputs also create an estuarine zone with a distinct zooplankton assemblage. Other common zooplankton include larvaceans, jell ies, euphausiid shrimp, amphipods, pteropod mollusks, and arrow worms. In the Beaufort and Chukchi Seas, invertebrate zooplankton productivity is highly seasonal as a result of the extremely cold winter temperatures. Many invertebrates (e. g. , copepods) h ave adapted by storing lipids for the winter and undergoing a winter dormant period during which they rest in the sediment or lower water column (p. 3

- 291)

.



### 4. 5 Essential F ish H abitat (EFH) and F ish

The Arctic Fisheries Management Plan has designated ess ential fish habitat ( EFH ) for three species:

• Arctic cod ( Boreogadus saida ) : Insufficient information is available to determine EFH for eggs, larvae, and early juveniles. However, this species has been reported to spawn under ice during winter.

• Saffr on cod ( Eleginus gracilis ) : Insufficient information is available to determine EFH for eggs, larvae, and early juveniles. For late juveniles and adults, EFH includes coastal pelagic and epipelagic Arctic waters and wherever there are sand and gravel subst rates.

• Snow crab ( Chionoecetes opilio ) : Insufficient information is available to determine EFH for larvae and early juvenile life stages. EFH for eggs, late juveniles, and adult snow crabs consists of bottom habitats along the inner and middle shelves in Arctic waters south of Cape Lisburne, wherever there are substrates consisting mainly of mud.

Arctic a quatic systems undergo extended seasonal periods of frigid and harsh environmental conditions. Important environmental factors that Arctic fishes mus t contend with include reduced light, seasonal darkness, prolonged low temperatures and ice cover, and low seasonal productivity. The lack of sunlight and the extensive ice cover in Arctic latitudes during winter8 months affect primary and secondary produc tivity, making food resources very scarce during this time, so most of a fish’s yearly food supply must be acquired during the brief Arctic summer. In addition, most fish species inhabiting the frigid polar waters are thought to grow slowly relative to in dividuals or species inhabiting boreal, temperate, or tropical systems. Because of the harsh conditions, many species found in the Beaufort and Chukchi Seas are at the northern limits of their range. Arctic f ishes may use one or more aquatic habitats to carry out their respective life cycles. Such habitats may include bays, ice, reefs, and nearshore, coastal, continental shelf, oceanic, and bathyp elagic waters and/or substrates (p. 3

- 279)

. The Beaufort and Chukchi Seas support at least 98 fish species f rom 23 families. The greatest number of species is found in the Chukchi Sea (p. 3

- 279).

Common diadromous fishes found in the Beaufort and Chukchi Seas are salmonids and include Arctic cisco ( Coregonus autumnalis ), least cisco ( Coregonus sardinella ), h umpback whitefish ( Coregonus pidschian ), broad whitefish ( Coregonus nasus ), and Dolly Varden ( Salvelinus malma ). Although present in Arctic waters, all five Pacific salmon species significantly decrease in abundance north of the Bering Strait and from wes t to east along the Beaufort and Chukchi Seas. Pink salmon and chum salmon are the most common Pacific salmon in Arctic waters. Warming of waters in the Be aufort , Chukchi

, and Bering Seas has resulted in species of salmon migrating further northward; this trend is exp e cted to continue as the water temperature continues to increase. The amount of change is not well documented at this time. The National Marine Fisheries Service (NMFS) does not allow commercial fishing for salmon in the Chukchi and Beaufort Seas in the U.S. Exclusive Economic Zone (pp. 3

- 154 and 3

- 155).

Common pelagic fish in the Beaufort Sea and Chukchi Sea include P acific sand lance ( Ammodytes hexapterus ), P acific herring ( Clupea pallasii ), Arctic cod ( Boreogadus saida ), capelin ( Mallotus villosus ), snailfish ( Liparidae ), and lanternfish ( Benthosema glaciale ) (p. 3

- 280)

. Most fish in the Beaufort and Chukchi Seas are demersal species, often migratory, living on or near the bottom. Species occurring in the Chukchi Sea include Arctic stagh orn sculpin ( Gymnocanthus tricuspis ), shorthorn sculpin ( Myoxocephalus scorpius ), Bering flounder, and Arctic cod. The most abundant demersal fish occurring in the Chukchi Sea are cod (family Gadidae), poachers (family Agonidae), Bering flounder ( Hippoglo ssoides robustus ), and sculpins (family Cottidae). Greenlings (family Hexagrammidae), eelpouts (family Zoarcidae), smelts (family Osmeridae), wolfish (family Anarhichadidae)

, and snailfish ( Lycodes spp.) are also present in Arctic waters. In the Beaufort Sea, Arctic cod, eelpouts, and walleye pollock ( Theragra chalcogramma ) comprised the majority of the catch in recent benthic trawl surveys (pp. 3

- 280 and 3

- 281)

.



### 4. 6 Marine and C oastal B irds

Because of the limited seasonal nature of open water and snow

- free conditions, the Beaufort and Chukchi Seas support a smaller number of avian species than onshore

. A bout 180 species have been reported from the Arctic National Wildlife Refuge, whereas a 1999

- 2001 summer survey of birds in the western Beaufort Sea de tected 30 species (primarily waterfowl). Most birds occurring in the Beaufort and Chukchi Seas and their adjacent coastal habitats are migratory, being present for all or part of the period between May and early November (p. 3

- 248)

.9 T wo species that are listed as threatened under the Endangered Species Act ( ESA ) occur in the Beaufort and Chukchi Sea Planning Areas. These species are the spectacled eider ( Somatria fischeri ) and the Alaska breeding population of the Steller’s eider. S pectacled eiders use important molting and staging areas including the Ledyard Bay Critical Habitat Unit located in the Chukchi Sea. On the Arctic North Slope or Arctic Coastal Plain, an average of 6,841 spectacled eiders, representing about 2 percent of the world’s populatio n, are present each summer. In addition, Kittlitz’s murrelet and the yellow

- billed loon, both Federal candidate species, occur in the coastal and inland waters adjacent to the Chukchi Sea Planning Area (pp. 3

- 251 through 3

- 25 3 )

.



### 4.7 Marine M ammals

Fift een species of marine mammals have been identified in the Beaufort and Chukchi Sea Planning Areas (Table 1). Four of these species are listed as threatened or endangered under the ESA, one is a candidate species, and two are proposed for listing as threat ened species. See pp. 3

- 194 to 3

- 217 of the Five Year PEIS for a complete description of life history and attributes. One species is under review for delisting

, and one is delisted under the ESA.

Table 1 . Arctic Marine Mammals Species Status ORDER CETACEA Suborder Mysticeti (baleen whales) Balaenoptera acutorostrata (minke whale)

– Balaenoptera mysticetus (bowhead whale) E/D Balaenoptera physalus (fin whale) E/D Eschrichtius robustus (gray whale) DL/D Megaptera novaeang liae (humpback whale) URD(a) Suborder Odontoceti (toothed whales and dolphins) Delphinapterus leucas (beluga whale)

– Monodon monoceros (narwhal)

– Orcinus orca (killer whale) D Phocoena phocoena (harbor porpoise)

– ORDER CARNIVORA Suborder Pinnip edia (seals, sea lions, and walrus) Erignathus barbatus (bearded seal) PT Odobenus rosmarus divergens (Pacific walrus) C Phoca fasciata (ribbon seal)

– Phoca hispida (ringed seal) PT Phoca largha (spotted seal) DL(b) Suborder Fissipedia (polar bears )
Ursus maritimus (polar bear) T/D Status: E = endangered under the ESA; T = threatened under the ESA; C = candidate for listing under the ESA; DL = delisted under the ESA; D = depleted under the Marine10 Mammal Protection Act (for the killer whale, it on ly applies to the AT1 group of eastern North Pacific transient killer whales); PT = proposed for listing as threatened under the ESA;

– = not listed (pp. 3

- 194 to 3

- 195)

. (a) Status: URD = under review for delisting, 2013 http://www.nmfs.noaa.gov/pr/species/esa/delisted.htm (b) Status: DL = delisted, 2013 http://alaskafisheries.noaa.gov/protectedresources/seals/ice.htm

This EA focuses on species of critical importance to either subsistence practices or trophic function of the Arctic food web. For descriptions of fin whales, humpback whales, gray whales, minke whales, narwhals, and harbor porpoise s , the reader is ref er re d to pp. 3

- 199, 3

- 205, 3

- 206, and 3

- 207 of the Five Year PEIS , respectively

.

Bowhead Whale

The endangered bowhead whale occurs in seasonally ice

- covered waters of the Arctic and near

Arctic, in the Western Arctic Basin. Bowhead whales generally mig rate from winter breeding areas (November to March) in the northern Bering Sea, through the Chukchi Sea in the spring (March through June) where most calving occurs, and into the Canadian Beaufort Sea where they spend much of the summer (mid

- May through Se ptember).

In the fall (September through November), bowheads were historically presumed to return along this general route, closer to shore across the Beaufort Sea and through the middle of the Chukchi Sea and closer to shore

, to the Bering Sea to overwin ter in polynyas and along edges of the pack ice.

The main fall migration begins in late August. The first whales are typically the larger ones, which establish the migration route in the Beaufort Sea. Migration through the eastern Alaskan portion of t he Beaufort Sea continues through September and into October. In contrast to the

presume d route that the paragraph above describes, a recent study show s t he fall migration from Amundsen Gulf to Barrow

, includ ing some whales that traveled inshore and other s that traveled offshore (p. 3

- 196) . From Barrow to the Bering Sea, bowheads occur r ed throughout much of the Chukchi Sea. All of the tagged whales traveled through the Chukchi Sea Planning Area during the fall migration, but only one whale did so during the spring migration. Most whales traversed the planning area in less than one week; however, one whale remained in the area for 30 days. In addition, during the fall migration, several whales passed Barrow, and then returned to Barrow for a period of ti me before completing their migration to the Bering Sea.

A nother study note s that

, during fall, many bowheads use the area near Barrow and the northern half of the Chukchi Sea Planning Area (p. 3

- 196)

. T he study also indicates that bowheads use the east ern Chukchi Sea, especially nearshore from Wainwright to the Bering Sea, less often than previously presumed

. Further

, the study shows that b owheads use t he western Chukchi Sea, including nearshore areas along the Russian Chukchi Peninsula north of the Be ring Strait, extensive ly during the fall. The best estimate of the abundance of the Western Arctic bowhead whale stock is 10,545 with a minimum population estimate of 9,472 (pp. 3

- 194 through 3

- 198).11 Bearded Seal

Most of the bearded seals offshore Alas ka occur over the continental shelf of the Bering, Chukchi, and Beaufort Seas. Their densities are greatest during the summer and lowest during the winter. They migrate north through the Bering Strait in April and May to summer ice on the edge of the Chu kchi Sea. Others remain in the open waters of the Chukchi Sea. During spring, they prefer areas that contain 70 to 90 percent sea

- ice cover and are most abundant 32 to 161 kilometers ( km ) (20 to 100 mi les [mi] ) from shore. NMFS estimates that 3,150 bear ded seals occur in the Beaufort Sea in the June timeframe, and 27,000 bearded seals in the Chukchi Sea in the May to June timeframe (p. 3

- 200)

.
Ringed Seal

The ringed seal, the most abundant seal in the Arctic, occurs throughout the Beaufort and Chukchi Seas. They live on and under extensive, largely unbroken, shorefast ice. Ice cover strongly influences ringed seal movements. They continue to use sea ice as resting platforms during the summer and fall

, and some occur during ice

- free periods in the Chu kchi Sea. A reliable population estimate for the Alaska stock is not available, but it is assumed to be over 249,000 and possibly as high as 1 million individuals (p. 3

- 201)

. In December 2014, NMFS proposed critical habitat for the Arctic ringed seal in the northern Bering, Chukchi, and Beaufort Seas.

Pacific Walrus

The Pacific walrus ranges through the shallow continental shelf waters of the Chukchi Sea where its distribution is closely linked with the seasonal distribution of the pack ice. While th ey occasionally move into the western Beaufort Sea during summer, most of the population is found in the Chukchi Sea during the summer months. Pacific walrus occupy two large Arctic areas during summer: (1) from the Bering Strait west to Wrangell Island

, and (2) along the northwest coast of Alaska from about Point Hope to north of Point Barrow. Within this area, summer and fall haul

- outs include Cape Lisburne, Corwin Bluff, Point Lay Barrier Islands, Icy Cape, Wainwright, Naokok, Asiniak Point, and Peard Bay. The majority of the population occurs north and west of Barrow, with the highest seasonal abundance along the pack

- ice front. Walrus forage in most areas they occupy, and areas of concentrated foraging generally correspond to regions of high benthic biomass, such as in the northeastern (Hanna Shoal) and southwestern Chukchi Sea (Jay et al

. , 2012 , pp. 1

- 13 ). With the southern advance of the pack ice in the Chukchi Sea during the fall (October to December), most of the Pacific walrus population migrat es south of the Bering Strait. The population of the Pacific walrus has been declining, mainly due to major stressors such as subsistence harvest and loss of sea ice. Between 1975 and 1990, there were approximately 201,039 to 234,020 individuals; this nu mber declined to approximately 129,000 in 2006 (pp. 3

- 201 and 3

- 202)

.

Polar Bear

Polar bears occur in the Chukchi and Beaufort Seas, from the Bering Strait to the Canadian border. In 2010, the U.S. Fish and Wildlife Service designated the following crit ical habitat for12 the polar bear: barrier islands, sea ice in both the U.S. Chukchi and Beaufort Seas , and terrestrial denning habitat. Seasonal movements of polar bears reflect changing ice conditions and breeding behavior. In spring, polar bears in the Beaufort Sea overwhelmingly prefer regions with ice concentrations greater than 90 percent and composed of ice floes 2 to 10 km (1.2 to 6.2 mi) in diameter. Mature males range offshore in early spring, but move closer to shore during the spring breeding s eason. With the breakup of the ice during spring and early summer, polar bears move northward

, where they select habitats with a high proportion of old ice. To reach this ice, polar bears may migrate as much as 1,000 km (620 mi). As ice re

- forms in the fall, the bears move southward, and by late fall are distributed seaward of the Chukchi and Beaufort Sea coasts. During winter, polar bears prefer the lead ice system at the shear zone between the shorefast ice and the active offshore ice.

In the fall, polar bears aggregate along the Beaufort Sea coastline in areas where Alaska Natives harvest and butcher marine mammals, primarily bowhead whales. Polar bears are attracted to these areas because they feed off the carcasses. Specific aggregation areas in clude Point Barrow, Cross Island, and Kaktovik. Polar bear concentrations also occur during the winter in areas of open water, such as leads and polynyas, and areas where beach

- cast marine mammal carcasses

occur.

A reliable estimate for the Chukchi and Bering Seas polar bear stock does not exist, but the best information available provides a minimum population estimate of 2,000 individuals. The best population estimate for the s outhern Beaufort Sea stock is between 1,397 and 1,526 individuals. This st ock is experiencing a population decline due to loss of sea ice (partly due to climate change), potential overharvest, and human activities (including industrial activities) in nearshore and offshore environments (pp

. 3

- 202 through 3

- 204)

.
Beluga Whale

Beluga whales occur in coastal waters of the Chukchi and Beaufort Seas in summer and fall. Ice cover, tidal conditions, access to prey, temperature, and human interactions affect the seasonal distribution of beluga whales. Some beluga whales migrate mor e than 2,700 km (1,500 mi) between the Bering Sea and the Mackenzie River estuary in Canada, sometimes moving more than 180 km (100 mi) per day. They will ascend large rivers and are apparently unaffected by salinity changes. The best population estimate for the Beaufort Sea stock is 39,258

, with a minimum estimate of 32,453 individuals

, while the best population estimate for the Chukchi Sea stock is 3,710 individuals (pp. 3

- 205 and 3

- 206)

.

Killer Whale

The killer whale occurs along the entire Arctic coast within the Chukchi Sea and other waters to the south ( p. 3

- 207)

.
Ribbon and Spotted Seals

The ribbon seal inhabits the Chukchi and western Beaufort Seas. They occur in the open sea, generally in the summer ; on the pack ice, generally in winter ; and only rarely on shorefast ice.13 The ribbon seal rarely occurs on land. Many ribbon seals migrate from the Bering Sea into the Chukchi Sea for the summer. Reliable population estimates and trends for the Alaska stock of the ribbon seal are not availabl e, although there is a provisional estimate of 49,000 ribbon seals in the eastern and central Bering Sea based on aerial surveys done in 2003, 2007, and 2008 (p. 3

- 207)

.

A d istinct p opulation s egment of the spotted seal occurs in the Beaufort and Chukch i Seas in the summer. Terrestrial haul

- out sites are generally located on isolated mud, sand, or gravel beaches or on rocks close to shore. Spotted seals frequently enter estuaries and sometimes ascend rivers, presumably to feed on anadromous fishes. Sp otted seals migrate out of the Arctic region in the fall (September to mid

- October) as the shorefast ice re

- forms and the pack ice advances southward. A reliable population estimate for the Alaska stock is not available, but preliminary results provide a population estimate of over 59,000 individuals (pp. 3

- 207 and 3

- 208)

.


### 4. 8 Subsistence

Traditionally, Alaska Natives hunted, fished, and lived off the land out of necessity. Alaska Natives view subsistence hunting and gathering as a core value of their t raditional cultures

. S ince contact with Western ways of life

, they have gradually made the transition to a mixture of subsistence and cash

- based econom ies , varying in degrees from community to community

. The first major contact with those from Western ci vilization was with commercial whalers starting in the 1850’s

. Alaska Natives would s ell goods to the whalers

, including carved walrus tusks with scrimshaw, often in the form of cribbage boards that the whalers liked and bought or bartered.
M ost subsiste nce activities are group activities that further core values of community, kinship, cooperation, and reciprocity (pp. 3

- 376 and 3

- 378). Current Federal regulations define subsistence use as “the customary and traditional use s by rural Alaska residents of wild, renewable resources for direct personal or family consumption as food, shelter, fuel, clothing, tools o r transportation; for the making and selling of handicraft articles out of non edible byproducts of fish and wildlife resources taken for personal o r family consumption; for barter or sharing for personal or family consumption; and for customary trade” ( 16 U.S.C. § 3113 )

. See also 36 CFR 13.420

, 36 CFR 242.4

, 50 CFR 36.2 , and 50 CFR 100.4.

The subsistence harvest plays an important role in the predo minantly Alaska Native communities adjacent to the Chukchi and Beaufort Sea Planning Areas. The communities bordering the Chukchi and Beaufort Seas are Point Lay, Point Hope, Wainwright, Barrow, and Kaktovik. The y are part of the Arctic ’s North Slope Bor ough, which has been described as “the most organized, strongest, and best

- funded subsistence economy in Alaska.” The Alaska Natives living in these communities are primarily Iñupia t Eskimo

, whose traditional culture is based on cooperation, kinship ties, and subsistence hunting and gathering. W haling , particularly for the bowhead and the beluga whales, is at the core of their traditional culture

. Hunters in the communities along the Beaufort Sea also hunt for bearded and ringed seals and walrus. This i ncludes the inland communi ty of Nuiqsut on the Colville River delta. An e xample of trade, bartering, and kinship sharing of marine mammal subsistence foods between coastal communities and inland communities is Anaktuvuk Pass, an inland community in the No rth Slope Borough about 250 miles southeast of Barrow (p p

. 3

- 386 and 3

- 389)

.14 While many of the most important subsistence resources are found in or near the sea

, Alaska Natives also rely on freshwater and terrestrial subsistence resources. However, e ven in communities where terrestrial resources such as caribou or freshwater and saltwater fish supply more meat, marine mammals still are culturally most important ( p. 3

- 396). Various types of subsistence resources utilized by the communities adjacent to the Chukchi and Beaufort Sea Planning Areas are:

• 8 marine mammal species

,

• 13 terrestrial mammal species

,

• 17 fish species

,

• 19 bird species , and

• 12 other resources (including berries, bird eggs, clams, etc.) (pp. 3

- 398, 3

- 399, and 3

- 400)

.



### 4. 9 Sociocultural R esources

The Chukchi and Beaufort Sea Planning Areas lie off the northern coast of the North Slope Borough, which is located largely in the North Slope region of Alaska. The population of the North Slope Borough in 2010 was 9,430, almost 54 percent of which were Alaska Natives (p. 3

- 386)

.
Chukchi Sea communities include Barrow, Wainwright, Point Hope, and Point Lay along the coast, while Atqasuk lies somewhat inland. Barrow is the largest permanent community on the
Nort h Slope and serves as the region’s administrative and commercial hub. It is a traditional Iñupia t settlement with 61 percent Alaska Natives. Subsistence whaling, hunting, and fishing are important to the economy, and many residents with full

- or part

- tim e employment continue to hunt and fish for food. The other, smaller communities are comprised of over 86 percent Alaska Natives that also rely heavily on subsistence harvesting. As of 2010, t he population of Barrow

was approximately 4,200 ; Point Hope

, 67 0 ; Point Lay

, 290 ; and Wainwright

, 560 (pp. 3

- 386 and 3

- 388)

.
Beaufort Sea communities are Nuiqsut and Kaktovik. Deadhorse is a workers’ enclave that houses as many as 5,000 transient workers from the nearby Prudhoe Bay oil fields

. Workers at Deadhorse live and work separately from the nearest communities of Nuiqsut and Kaktovik. Alaska Natives account for 87 percent and 89 percent of the population in Nuiqsut and Kaktovik, respectively. As of 2010, t he population of Nuiqsut was 402 and of Kaktovik

, 23 9. Both communities are subsistence based (pp. 3

- 386, 3

- 388

, and 3

- 389)

.
Western influence in the region has increased over the years due to strengthened military presence and industrialization. Alaska Natives successfully have incorporated modern tech nology into their subsistence way of life. Rifles and whale bombs have replaced spears and harpo on s ; aluminum skiffs are employed along with seal

- skin boats (umiak) ; whaling crews use electronic global positi oning and communication devices; and snow machi nes and all

- terrain vehicles have replaced dog teams and sleds (p. 3

- 390)

. Adoption of modern technology further15 reflects shifting from a purely hunting and gathering subsistence economy to a mixture of subsistence and cash

- based economies.



### 4.10 Health S tatus of Alaska Natives in the North Slope Borough

Alaska Native health has undergone profound changes since 1950, and the changes in health status among the Iñupiat residents of the North Slope mirrors State

- wide trends in Alaska Native health status in many respects. Since 1950, infant mortality, overall mortality, and life expectancy have improved significantly. However, over the same time period, cancer, chronic diseases (such as diabetes, cardiovascular disease, cardiopulmonary disease, hypertension , and asthma), and social pathology have increased. Alcohol and drug problems, associated accidental and intentional injury, depression, anxiety, assault

, and domestic violence are now highly prevalent and cause disproportionate health impacts and mortali ty for these communities. Suicide, especially amo ng youth, exceeds the U.S. rate by numerous orders of magnitude (pp. 3

- 415 , 3

- 416, and 3

- 417)

.



### 4.11 Environmental Justice

A large number of minority and low

- income individuals are located in the Arctic re gion. The number of minority individuals in the region exceeds 50 percent of the regional population

. T he number of minority individuals exceeds the State average by 20 percentage points (p. 3

- 413)

.



## 5.0 Environmental Consequences

5. 1 Alternative A

– P ro posed Action Alternative ( PAA )

Under the Proposed Action Alternative ( PAA ) , BOEM and BSEE would promulgate the proposed rule, and any future oil and gas exploration drilling on the Arctic OCS would be governed by the new and revised requirements. In order to assess the potential environmental impacts associated with the PAA (Appendix B) , it is first necessary to understand the type of activities that first would be affected by the rules

.

T he effects of the proposed rule must be considered in the context o f Arctic EPs and the exploration activities typical of the Chukchi and Beaufort Sea Planning Areas. R ecent EPs and three recent BOEM documents were used to help inform and prepare this analysis (USDOI, BOEM, Alaska OCS Region

, 2011

- a ; USDOI, BOEM, Alaska OCS Region

, 2011

- c ; and USDOI, BOEM

, 2012 )

. A ll three environmental documents are incorporated by reference (including citations) to help differentiate the potential effects of exploration activities under the proposed rule (relative to existing standards ) and to ensure the context, intensity, scope, timing, and general location are representative of recent and foreseeable exploration drilling operations on the Arctic OCS.

In a typical Arctic EP , e xploration wells would be drilled during the open

- water s eason in the Arctic OCS , which generally runs from July, as soon as ice and weather conditions allow, through October. The drilling would continue as necessary during subsequent open

- water16 seasons until all wells are completed. Drilling operations would be conducted from a Mobile Offshore Drilling Unit (MODU), which would be supported by additional vessels for ice management, anchor handling, crew and supplies transport, waste storage and transport, and spill response. The handling of all drill cuttings, muds, and other discharges would comply with the requirements of the relevant U.S. Environmental Protection Agency ( US EPA) Region 10 National Pollutant Discharge Eliminatio n System (NPDES) permit. The number of wells may vary depending on the EP

. The nu mber of wells drilled in a given season would depend upon, among other things, ice conditions, length of time that each drilling si te is accessible, and condition s of plan approval (USDOI, BOEM, Alaska OCS Region, 2011

- c). Exploratory drilling activities would occur an average of 30 to 45 days at each drill site in the Chukchi Sea and 34 to 44 days in the Beaufort Sea

. During such operations, accidental spills are possible. For the purposes of analysis, the EA assumes a large oil spill would be ≥1,000 bb l

, and a catastrophic spill, although not expected to occur, could approach 2

. 1 million bbl of crude oil in the Chukchi Sea Planning Area and 3

. 9 million bbl of crude oil in the Beaufort Sea Planning Area (USDOI, BOEM, Alaska OCS Region, 2011

- b , Appendix D ; USDOI, BOEM

, 2012 , p. 4

- 167)

.
The environmental effects of provisions of the proposed rule that would modify exploration planning and operations are described below.



### 5. **1 .1**  **Provisions T**  **hat W**  **ould N**  **ot C**  **ause E**  **nvironmental I**  **mpacts**

BOEM and BSEE have dete rmined that the following provisions of the proposed rule are purely informational or administrative in nature and would not cause environmental impacts. While globally designed to enhance the safety and careful planning of operations, t hey do not prescri be or modify any actions or operations that would themselves impact the environment . I nstead

, they are proposed to enhance general planning and reporting to improve and / or document the overall management and effectiveness of operations. Therefore, furthe r environmental analysis of these provisions is not necessary.

§ 250.105 Definitions

. § 250.188 What incidents must I report to BSEE and when must I report them? § 250.198 Documents incorporated by referenc e

. § 250.418 What a dditional information must I submit with my APD [application for a permit to dr i ll] ? § 250.470 What additional information must I submit with my APD for Arctic OCS exploratory drilling operations? § 250.1920 What are the a uditing requir ements for my Safety and Environmental Management System ( SEMS ) program? § 254.6 Definitions

. § 254.52 Format of response plan

. § 254.55 Spill response plans for facilities located in Alaska State waters seaward of the coast line in the Chukchi and Beaufort Seas

. § 254.65 Purpose

. § 254.70 What are the a dditional requirements for facilities conducting exploratory drilling from a MODU on the Arctic OCS ?17 § 254.80 What additional information must I include in the “E mergency response ac tion plan ” section for facilities conducting

exp l oratory drilling from a MODU on the Arctic OCS? § 254.90(b) What are the additional requirements for exercises of your response personnel and equipment for facilities conducting exploratory drilling from a MODU on the Arctic OCS? (Notification of Regional Supervisor 60 days before handling, storing, or transporting oil ) § 550.105 Definitions

. § 550.200 Definitions. § 550.204 When must I submit my IOP for proposed Arctic exploratory drilling operations an d what must the IOP include? § 550.220 If I propose activities in the Alaska O CS Region, what planning information must accompany the EP?



### 5. **1 .2**  **Operational P**  **rovisions A**  **nalyzed**

This EA analyze s the direct, indirect, and cumulative effects of operational provisions of the proposed rule. The effects analysis is organized into three themes :

• The pollution prevention provision proposed at § 250.300, which clarifies existing requirements for the capture of petroleum

- based drilling mud and associated cuttings

, as well as BSEE’s existing discretionary authority to require capture of water

- based drilling mud and associated cuttings under certain circumstances , is intended to prevent discharge of oil into the marine environment and to minimize other effects of mud and cuttings on water quality

, subsistence activities , and marine fauna

.

• P rovisions intended to reduce the likelihood of a spill occurr ing :

§ 250.402(c) When and how must I secure a well ? § 250.447 When must I p ressure test the BOP system ? § 250.452 What are the r eal

- time monitoring requirements for Arctic OCS exploratory drilling operations? § 250.473 What must I do to p rotect health, safety, property, and the environment while operating on the Arctic OCS?

• Provisions intended to reduce the size an d /or duration of an oil spill and therefore its environmental effects :

§ 250.471 What are the requirements for Arctic OCS source control and containment equipment (SCCE)? § 250.472 What are the r elief rig requirements for the Arctic OCS? § 254.90(a) & ( c) What are the additional requirements for e xercises for your response personnel and equipment for facilities conducting exploratory drilling from a MODU on the Arctic OCS?18 There is an explanatory summary for each provision presented in the preamble of the proposed rulemaking (USDOI, BSEE

, and BOEM

, 2014)

. The complete text of the operational provisions is provided in Appendix A. The proposed rulemaking, if implemented, w ould largely contribute

to the avoidance or reduction of potential adverse environ mental effects that may otherwise

occur absent the rulemaking

. However, in some cases, specific provisions of the PAA could trigger certain additio nal activities that c ould cause additive, adverse effect s

. For that reason, effects are further organized b y beneficial (i.e., avoided) and adverse effects.



### 5. **1**

**. 3**  **Environmental Analysis of**  **Operational Provisions** 

Pollution Prevention: Summary D escription of Proposed § 250.300 (b)

Proposed § 250.300 (b) would clarify BSEE’s pollution prevention regulation as i t pertains to spent mud and cuttings generated during Arctic OCS exploratory drilling operations. O perators can use drilling fluids ( i.e., mud) that are water

- based or that contain petroleum (i.e., oil). Cuttings generated using the latter would be conta minated with oil

, and d ischarge of such mud or cuttings into the marine environment also would discharge the associated oil. Currently, under 30 CFR 250.300, no petroleum

- based substances can be added to the drilling mud system without prior approval of t he District Manager

, who must also approv e the method of disposal of drill ing mud and cuttings

. Additionally, US EPA National Pollutant Discharge Elimination System general permits for discharges from oil and gas exp loration facilities on the Arctic OCS,

w hich became effective on November 28, 2012, effectively prohibit discharge of oil

- based mud and cuttings and authorize the discharge of only water

- based drilling fluids and associated cuttings , and only within certain parameters (USEPA, 2014) . Operators c an choose to use oil

based or synthetic

- based fluids during exploration activities, but those drilling fluids and associated cuttings may not be discharged into the marine environment. These permits currently

are scheduled to expire on November 27, 2017.

Proposed § 250.300 (b) would requir e operators to capture all petroleum

- based mud from Arctic OCS exploratory drilling operations

, and cuttings from operations that utilize petroleum

- based mud

, to prevent their discharge into the marine environment. Pro p osed § 250.300 (b) also takes into consideration the variation in marine mammal migrations and subsistence hunting patterns in different areas of the Arctic OCS region and at different times of the year by clarifying the Regional Supervisor ’s (BSEE) discret ionary authority to require the capture of water

- based mud and associated cuttings where location

- and season

- specific circumstances warrant such restrictions. This discretion would be exercised based on factors including, but not limited to:

(a) the pr oximity of the exploratory drilling operations to subsistence hunting activities;

(b) the extent to which discharged mud or cuttings may cause marine mammals to alter their migratory patterns in a manner that interferes with subsistence activities; or,

(c) the extent to which discharged mud or cuttings may adversely affect marine mammals, fish, or their habitat.19 Pollution Prevention: Environmental A nalysis of Proposed § 250.300

This proposed section of the PAA is designed to reduce the likelihood of adverse environmental and sociocultural effects from the discharge of drilling mud and cuttings into the marine environment

.

Partners and s takeholders, primarily Alaska Natives, have expressed concern that mud and cuttings from exploratory drilling op erations could adversely affect marine species ( e.g., whales and fish ) and their habitat, and compromise the effectiveness of subsistence hunting activities.
T he release of mud and cuttings could result in increased turbidity and concentrations of total

s uspended solids in the water column, which could displace marine mammals , if present, from the drill sites and could adversely affect habitat and prey within and around the drill site (USDOI, BOEM, Alaska OCS Region

, 2011

- c )

. Subsistence hunters similarly have expressed concern that whales are capable of detecting the odors from mud and cuttings and will avoid areas where these discharges occur, potentially impacting subsistence harvest activities. While this is considered t raditional e cological k nowledge and has not been substantiated by the scientific community, t here is little doubt that mysticetes have a more highly developed olfactory ability than microsmatic mammals like humans (Thewissen et al., 2011)

. Thewissen et al. (2011) hypothesize that bowhe ad whales use olfaction to detect conspecific mates and/or

, more likely

, clouds of the plankton on which they feed. Displacement of marine mammals could force subsistence h unting farther away from shore

, which in turn can increase transit time, reduce the likelihood of successful harvest, increase exposure to adverse weather and dangerous sea states, and increase safety concerns for subsistence hunters. Finally, the farther away whales are harvested from a community, the greater the length of towing time necessary to bring the animals back to shore for processing. This increased tow time could negatively affect the viability of the meat and blubber because of spoilage

.

Pollution Prevention: Direct and Indirect Effects

By reducing discharges of petroleu m

- based mud and , in certain circumstances, water

- based mud and associated cuttings into the marine environment, this section of the PAA would help avoid potential adverse environmental impacts in the explorat ion drill ing site areas in the Chukchi and Beauf ort Seas :

• Suspended sediment , solids, and turbidity in the water column around the vicinity of drill sites would decrease, which would result in increased light transmi ssivity and visibility. Exposure in the lower water column would be reduced for so me fish species, such as sculpin species, yellow fin sole, Bering flounder, starry flounder, and sand lance. This would increase visibility (and

, therefore, their feeding ability), cause less interruption to their reproductive behaviors, and reduce the po tential for smothering of the fish themselves and their benthic prey (USDOI, BOEM, Alaska OCS Region

, 2011

- a, p. 78 ; USDOI, BOEM, Alaska OCS Region, 2011

- c, p. 80 ). Certain impacts would be avoided for weak swimming or non

- swimming developmental life stag es of larvae, fry, smolt, or eggs of fishes in the vicinity of the drill sites, such as epipelagic Arctic cod eggs and larvae and capelin juveniles, or demersal fish life stages with strong affinities to benthic habitats, such as sculpins, flounder, snailf ish, saffron cod eggs, capelin eggs

, and Arctic20 cod juveniles and adults (USDOI, BOEM, Alaska OCS Region

, 2011

- a, p. 79). Additionally, decreased suspen d ed solids would reduce localized and temporary losses of some benthic and pelagic organisms. Decreasi ng turbidity and concentrations of total suspended solids in the water column may lessen displacement of marine mammals from the drill sites and improve habitat and prey within and around the drill site. For example, walrus foraging habitat, which can be affected by accumulation of sediments on the sea floor, would be less affected (USDOI, BOEM, Alaska OCS Region, 2011

- c , p. 96).

• Hydrocarbon concentrations, including polycyclic aromatic hydrocarbons and some metals, would be reduced in the lower water c olumn and seafloor sediments around the drill sites. Decreased concentrations of hydrocarbons and metals in the lower water column and seafloor sediments would reduce the potential for physiological and toxicological effects on fish adults, eggs, and larv ae in the vicinity of the drill sites (USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 80). Some marine mammals , such as the bowhead whale and the Pacific walrus, would also benefit, as their prey would be exposed to lower concentrations of hydrocarbons and me tals (USDOI, BOEM, Alaska OCS Region

, 2011

- a, pp. 90 and 99). For example, Pacific walrus, which feed primarily on benthic invertebrates, some of which are known to concentrate contaminants, would ingest lower levels of hydrocarbons and/or metals (USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 96).

• Whales and other species that may be capable of detecting the odors from mud and cuttings would be less likely to avoid the areas around the drill sites. T his is considered traditional ecological knowledge and ha s not been substantiated by scientific study.
H owever, there is little doubt that mysticetes have a more highly developed olfactory ability than microsmatic mammals like humans (Thewissen et al., 2011). Thewissen et al

. (2011) hypothesize that bowhead wha les use olfaction to detect conspecific mates and/or

, more likely

, clouds of the plankton on which they feed. If certain species of whales are in fact avoiding the areas around drill sites due to their detection of odors from mud and cuttings, t his provis ion of the PAA c ould have a positive impact on marine mammals and subsistence activities in the area s surrounding the drill sites.

• The potential health effects of oil spills can disproportionately impact Alaska Natives, other minority population groups

, and low

- income communities. E ffects that could be avoided or reduced include those related to worker safety, toxicology in workers and community members, and mental health emanating from social and economic disruption. Such effects may otherwise dispropo rtionately affect low

- income persons in the North Slope Borough (USDOI, BOEM

, 2012 , p. 3

- 413)

.

W hile the PAA can be expected to reduce or avoid the potential adverse environmental and sociocultural effect s from the discharge of drilling mud and cuttings i nto the marine environment , proposed § 250.300 (b) also could contribute to incremental or additive, adverse effects. A ctivities associated with this requirement that could contribute to adverse effects include the prolonged use of equipment, particularly vessels

, already on

- site, or the use of additional equipment to capture mud and associated cuttings . The source document for the analysis below is the Chukchi Sea Planning Area, Chukchi Lease Sale 193, Shell Revised21 Chukchi Sea Exploration Plan, Environme ntal Assessment ( USDOI

, BOEM, 2011

- c ) . Additive, adverse effects could include the following:

• Air quality could be adversely affected by the introduction of additional emissions from vessels during any increased operational time

, or from the use of add itional vessels ( needed to capture mud and cuttings ) (pp. 65

- 71). However, any effects related to vessel and support equipment emissions would be localized and temporary. Based on these factors and the short duration of the potential increased operationa l time, these activities would have a minor effect.

• Water quality could be adversely affected by prolonged use of vessels or the use of additional vessels during any increased operational time (pp. 72

- 73). However, any effects related to vessel discharge s would be localized and temporary. Based on these factors and the short duration of the potential increased operational time, these activities would have a minor effect.

• Marine and coastal birds could be adversely impacted from vessel noise during any i ncreased operational time or from the use of additional vessels . Routine vessel traffic has limited potential to disturb birds

, and could temporarily move them a short distance to another location (p. 84). Several species of birds, such as the spectacled and Steller’s eiders, also could be subject to vessel collisions during this time because they fly low and fast over the ocean and often do not or cannot react in time to avoid vessels (p. 85). These effects would be localized and temporary. Based on th ese factors and the short duration of the potential increased operational time, these activities would have a minor effect.

• Fish could be adversely impacted from vessel noise during any increased operational time or from the use of additional vessels . Fi sh also could be indirectly affected by water quality degradation (pp. 89

- 108). These effects would be localized and temporary. Based on these factors and the short duration of the potential increased operational time, these activities would have a minor effect.

• Marine mammals could be impacted adversely from vessel noise during any increased operational time or from the use of additional vessels

. Vessel noise may contribute to an incremental increase in communication masking and limited behavioral dist urbance related to noise exposure (pp. 90

- 91, 96

- 97, 99, and 101)

. Some species of marine mammals also could be subject to vessel collisions during this time. Additionally, marine mammals could be affected indirectly by water quality degradation and impa cts to prey species (pp. 89

- 108). These effects would be localized and temporary. Based on these factors and the short duration of the potential increased operational time, these activities would have a minor effect.

• Increased use of vessels

, use of additional vessels , or prolonged use of vessels on the OCS attributable to the requirements of § 250. 300 (b) of the PAA may increase the risk of

non

- permitted vessel discharges, collisions, allisions, vessel groundings, equipment failures, etc

. The types of small spill s most likely to result from such events would be22 localized and temporary, and would have minor effects on the marine environment.

Pollution Prevention: Cumulative Effects

The Arctic Ocean ecosystem as a whole is rapidly changing, with mel ting sea ice and increasing sediment input from numerous regional river systems. Open

- water seasons are longer than in past years

, and there has been a reduction in multi

- year ice. As the ice cover is reduced, the number of cargo, tourism, and research v essels in the region is expected to continue increasing (USDOI, BOEM , Alaska OCS Region

, 201 1

- a, p. 74). Other events that are currently ongoing in the U.S. Arctic region

, or that may occur in the foreseeable future

, and that may affect water quality incl ude: increased air traffic, fuel and petroleum spills, permitted and non

- permitted discharges, long

- distance aerosol

- transported pollutants, the discharge of other pollutants, warming temperatures, ocean acidification, and risk of invasive species from shi p hulls and equipment deployed (USDOI, BOEM, Alaska OCS Region

, 2011

- a, p. 67). This provision of the PAA would not necessitate any operations that would meaningfully further exacerbate the degradation of the marine water quality or pelagic or benthic hab itat ( USDOI, BOEM, Alaska OCS Region, 2011

- a , pp. 75

- 76)

. By reducing discharges of petroleum

- and , in certain circumstances, water

- based mud and associated cuttings into the marine environment, promulgation of this provision of the PAA potential ly would decrease incremental cumulative impacts to fish, marine mammals, and subsistence harvest s in the Chukchi and Beaufort Seas

. A ny reduction of cumulative impacts from this provision of the PAA likely would be limited to the immediate area s surrounding the d rill sites. Any potential cumulative adverse effects would be temporary, localized, and minor.

Reducing the Likelihood of a n Oil Spill Occurring

Summary D escription:

§ 250.402(c) When and how must I s ecur e a well ? § 250.447 (b) When must I p ressure tes t the BOP syste ? § 250. 452 What are the r eal

- time monitoring requirements for Arctic OCS exploratory drilling operations? § 250. 473 What must I do to protect health, safety, property, and the environment on the Arctic OCS?

Proposed § 250.402(c) would req uire operators to ensure that any equipment left on or in a temporarily abandoned well that has penetrated below the surface casing be secured in a manner that prevents or minimizes the likelihood of the equipment being damaged or the integrity of the well and equipment being compromised. The primary concern is for ice that could sever, dislodge, or drag any exploration

- related equipment, obstructions, or protrusions left on the well or the adjacent seafloor. If ice were to contact equipment left on or in a well that had penetrated hydrocarbons, the impact could damage the well and potentially compromise the cement, casing, or safety valves and plugs inside the well and could result in the discharge of hydrocarbons.

Proposed § 250.447 (b) would require a B OP pressure

- test frequency of 7 days for Arctic OCS exploratory drilling operations (instead of every 14 days under the existing rules) . This provision reflects concern regarding the potential for extreme weather conditions to compromise23 the integrity or functionality of a BOP, particularly one that is maintained on a surface vessel or facility such as a jackup rig under Arctic OCS conditions. Ensuring the proper functioning of a BOP, which is a primary line of defense against a loss of well control, is c ritical to Arctic OCS exploratory drilling operations.

Proposed § 250.452 would require real

- time data gathering on the BOP control system, the fluid handling systems on the rig, and the well’s downhole conditions. In addition, this provision would req uire operators to immediately transmit the data during operations to an onshore location where it must be stored and monitored by personnel who are capable of interpreting the data. The onshore monitoring personnel would be required to have the authority, in consultation with rig personnel, to initiate any necessary action in response to anomalous data or events. Such personnel also must have the capability for continuous and reliable contact with rig personnel to ensure the ability to communicate informa tion or instructions between the rig and onshore facility in real time, while operations are underway. This section also would require that real

- time monitoring data be available to BSEE upon request to enable BSEE to perform its oversight role and to mon itor responses to events as they unfold. This provision would increase the level of oversight of well conditions during operations, ensuring that onshore personnel are in a position to review data

, help rig personnel conduct operations in a safe manner

, a nd be able to assist the rig crew in identifying and evaluating unusual conditions that may arise during operations.

Proposed § 250.473 would require that all equipment and materials proposed for use in Arctic OCS exploration drilling operations be rated or de

- rated for service under conditions that can be reasonably expected during operations. Because of the extreme cold temperatures and potential ice loading anticipated at drill sites, operators must ensure that the equipment and materials proposed for use can operate safely and effectively in such conditions. For example, cranes must be designed to withstand ice loads, and operational limitations of components under extreme cold temperatures (e.g., reduced tensile strength) must be understood and acco unted for. Also, capping and containment equipment must be specifically designed to withstand the demands of Arctic conditions . This provision also would require operators to employ measures

to address human factors such as safety of the workforce, healt h, and decision

- making in the context of weather conditions that can be reasonably expected during operations.

Environmental Analysis:

§ 250.402(c) When and how must I secure a well? § 250.447 When must I pressure test the BOP system? § 250. 452 What are the real

- time monitoring requirements for Arctic OCS exploratory drilling operations? § 250. 473 What must I do to protect health, safety, property, and the environment on the Arctic OCS?

These provisions are designed to lessen the probability of oi l spills from Arctic OCS exploratory drilling operations

, thus reduc ing the possibility that an oil spill would impact environmental resources. However, implementation of proposed §§ 250.402(c) and 250.447 also may cause some potential adverse environment al effects

, given the fact that additional operational24 requirements and/or time on the Arctic OCS may be necessary to comply with these two provisions. Specifically, additional equipment or prolonged use of the equipment already on

site, such as aircraft and vessels, may be necessary to implement the provisions of the rule and to handle additional crew and supply requirements, to conduct any required marine mammal and ice observations, etc. No potential adverse environmental effects are associated with th e other

two sections

, proposed § § 250.452 and 250.473.

Reducing the Likelihood of an Oil Spill Occurring : Direct and Indirect Effects

These four provisions are designed to lessen the possibility of oil spills from Arctic OCS exploratory drilling opera tions

, thus reduc ing the potential that an oil spill could impact environmental resources in the Chukchi Sea and Beaufort Sea Planning Area s . The following summarizes the potential adverse environmental impacts associated with oil spills that could be red uced or avoided through implementation of these four provisions of the PAA.

Reducing the Likelihood of an Oil Spill Occurring : Effects T hat C ould B e R educed or A voided with P romulgation of T hese P rovisions of the R ule

• Assuming an incremental ly greater r isk absent the proposed rule, a small oil spill would cause an increase in concentrations of gaseous hydrocarbons, which could affect onshore air quality. Effects would be localized and temporary. Eventually, the continuing decrease in surface oil, lesse ning use of clean

- up equipment, and the effect of Arctic winds would be expected to decrease any onshore air quality impacts to minor levels of effects (USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 70). The effects of a large oil spill or a catastrophic oil spill on air quality would be moderate to major during the initial event and during the response and cleanup process. The impacts at a given location would depend on the size, location, and duration of the spill and meteorological conditions. Effects wo uld diminish with time because most of the surface oil would evaporate before reaching the shoreline (where effects would be minor) (USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 70).

• Assuming an incremental ly greater risk absent the proposed rule, a small oil spill would introduce hydrocarbons and temporary toxicity to the surface water around the vicinity of the sp ill site

. T he effects would be localized and short

- term ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 73). A large spill affecting coastal water s could result in longer term impacts on water quality, but cleanup efforts would reduce the likelihood of long

term impairment. A large spill in marine waters would be expected to have temporary impacts on water quality; however, cleanup efforts and evap oration, dilution, and dispersion would minimize long

- term impacts. Overall, i mpacts on water quality from large spills are expected to be minor to major, depending on the location, timing, magnitude of the event, and the effectiveness of containment and cle anup activities (USDOI, BOEM

, 2012 , p. 4

- 193). Sustained degradation of water quality would be unlikely ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 73). The impacts to water quality from a catastrophic oil spill would be moderate to major, depending o n the location, timing, and magnitude of the event

, as well as the effectiveness of spill containment and cleanup activities

. S ustained degradation of water quality could result from hydrocarbon contamination that exceeds State and Federal water and sedim ent25 quality criteria (USDOI, BOEM

, 2012 , p. 4

- 193).

Impacts on coastal habitats could range from negligible to moderate for small spills and moderate to major for large spills, if recovery from the effects of a spill does not occur and exposure results in habitat loss. Oil or other spilled materials might be transported to barrier island beaches, coastal beaches, or lagoon beaches by currents or tides. Direct mortality of biota could result on affected beach habitat. Oil could become stranded on beaches and penetrate into subsurface layers or be carried to higher elevations by storm waves and tides and affect vegetation behind beaches. Impacts on wetlands from oil spills could result in extensive injury to or mortality of vegetation and invertebrates in or on the substrate of coastal and estuarine habitats. Spills may impact a variety of species differently, which could result in changes in flora and fauna community structure and direct loss of habitat (USDOI, BOEM

, 2012 , p. 4

- 261). A catastrophic oil spill would potentially result in hea vy o r widespread deposits of oil and would have a greater likelihood for extensive areas of shoreline being affected and heavy deposits of oil in multiple locations. The degree of effects and length of recovery depend on a number of factors such as : the type and amount of oil, extent of biota exposure, substrate type, degree of sediment contamination, time of year, temperature, and species sensitivity. Impacts to coastal habitat from a catastrophic oil spill could have moderate effects if recovery of habitats occurs, and major effects if recovery does not occur and exposure results in habitat loss (USDOI, BOEM

, 2012 , p. 4

- 262).

• The impacts of oil spills on pelagic habitat would range from negligible to minor for small spills and from minor to moderate for large spills. Large spills would temporarily reduce the quality of large areas of pelagic habitat. Most released oil would float above the seafloor, so exposures would be expected for zooplankton, which lack the mobi lity to avoid the oil. However, the oil would be broken down by natural processes, and pelagic habitat would recover. A catastrophic oil spill could result in minor to moderate impacts to pelagic habitat. Pelagic organisms could be exposed to lethal or sublethal concentrations of hydrocarbons or mixtures of hydrocarbons and dispersants, if used during cleanup operations. However, over time, hydrocarbons in the water column would be diluted and broken down by natural processes

, and pelagic habita t would recover (USDOI, BOEM

, 2012 , p. 4

- 304).

• A s mall oil spill is not likely to result in the degradation of benthic marine habitat

, because hydrocarbons associated with small spills would be diluted to low concentrations as they moved through the water. Assu ming an incremental ly greater risk absent the proposed rule, a large spill would cause minor to moderate impacts , depending on various factors such as the size, duration, timing, and location of the spill, and the nature of the benthic habitat cont acted by the oil (USDOI, BOEM

, 2012 , pp. 4

- 289 and 4

- 290). Impacts from a catastrophic oil spill would also depend on these factors. Hydrocarbons could persist at sublethal concentrations in sediments for decades, and sensitive benthic habitats damaged by a spil l would likely recover slowly and could suffer long

- term loss of ecological function. Major impacts to hard

- bottom kelp habitat could occur if these areas were heavily oiled and high mortality occurs. However, hydrocarbons would be broken down by natural processes and most benthic habitats would likely recover26 (USDOI, BOEM

, 2012 , p. 4

- 290).

• Impacts on invertebrates from a small oil spill would range from negligible to minor, since a small surface or subsurface hydrocarbon spill would be rapidly diluted a nd would likely result in only small localized, sublethal impacts to invertebrates. Assuming an incrementally greater risk absent the proposed rule, t he impact magnitude of large oil spills on invertebrates would be primarily a function of the invertebrat e species and habitat affected. Impacts would be greatest if a large spill occurred during a reproductive period or contacted a location important for spawning or growth such as intertidal and nearshore subtidal habitats. Overall, impacts from large spil ls are expected to be temporary as oil is diluted and broken down by natural chemical and micr obial processes (USDOI, BOEM

, 2012 , p. 4

- 476). Local populations of intertidal organisms affected by

a catastrophic oil spill would be measurably depressed for s everal years

, and oil could persist in shoreline sediments for decades. However, benthic and pelagic invertebrates typically have short generation times and should recover. Overall, impacts to invertebrates from a catastrophic oil spill could range up to moderate ( USD OI, BOEM

, 2012

, p. 4

- 478).

• Assuming an incremental ly greater risk absent the proposed rule, a small oil spill could introduce hydrocarbons and effects with respect to toxicity to the surface water. Pelagic fish adults, juveniles, eggs and l arvae could be exposed. Acute and chronic effects could occur to the various life stages of the fish species in the area ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 81). Overall, i mpacts from small oil spills on fish would range from negligible to minor, as these spills would be localized and are unlikely to affect a substantial number of fish before dilution and weathering would reduce concentrations of toxic fractions to nontoxic levels (USDOI, BOEM

, 2012 , p. 4

- 437). Large spills and catastrophic oil s pills would affect a wider area

, and the magnitude of effects would depend on : the location, timing, and volume of spills, distribution and ecology of affected fish species, and other environmental factors. Most adult fish are highly mobile and would like ly avoid lethal hydrocarbon exposures, although they may be subjected to sublethal concentrations. Smaller species and egg and larval life stages are more likely to suffer lethal or sublethal exposures from oil contact because of their relative lack of

mo bility. Overall, impacts on fish would range from minor to moderate for large spills and catastrophic oil spills (USDOI, BOEM

, 2012 , p. 4

- 437).

• In EFH areas

, small obligate benthic species, eggs, larvae, and some managed species and their prey could ex perience lethal and sublethal effects from contact with hydrocarbons. Therefore, assuming an incrementally greater risk absent the proposed rule , i mpacts to EFH from a small spill would range from negligible to minor

, and from minor to moderate for large s pills (USDOI, BOEM, 2012 , p. 4

- 318). In the event of a catastrophic oil spill , managed species that suffer large losses of early life stages or long

term sublethal impacts could experience moderate to major population

- level effects. Overall, a catastroph ic oil spill could result in moderate to major impacts on EFH depending on : the size of the spill, its location, environmental factors, and the uniqueness of t he affected EFH (USDOI, BOEM

, 2012 , p. 4

- 318). EFH could be impacted from vessel and aircraft no ise associated with spill response

. These activities would have a27 minor effect (USDOI, BOEM, Alaska OCS Region, 2011

- c, pp. 89

- 108)

.

• A small spill would not persist in the environment very long

, resulting in few opportunities to contact threatened and en dangered birds. Since small spills would have only the potential to impact limited areas of habitat and few individuals, they would have minor impacts on marine and coastal birds. Assuming an incrementally greater risk absent the proposed rule, l arge spi lls have the potential for sublethal or lethal effects to marine and coastal birds contacted by spilled oil , especially those spills that enter coastal lagoons and delta areas where the oil may impact b irds using those habitats for molting and staging. Th erefore, effects on marine and coastal birds are expected to be moderate to major for a large spill. Similar ly , a catastrophic oil spill could have moderate to major impacts on marine and coastal birds were spilled oil to reach important habitat areas (US DOI, BOEM, Alaska OCS Region

, 2011

- c , p. 86). For example, the Beaufort Sea Planning Area contains important nesting, molting, and stopover habitat for many species of coastal and marine birds; therefore, a catastrophic oil spill has the potential to affe ct large numbers of birds that are already at the edge of their geographic range and are sensitive to additional stres s (USDOI, BOEM

, 2012 , p. 4

- 413). Threatened and endangered birds and marine and coastal birds could be impacted from vessel and aircraft noise associated with spill response

. These activities would have a minor effect (USDOI, BOEM, Alaska OCS Region, 2011

- c, p. 85).

• Assuming an incremental ly greater risk absent the proposed rule , m arine mammals may be exposed to spilled oil by direct cont act, inhalation, and ingestion (directly, or indirectly through the consumption of contaminated prey species). These exposures may result in a variety of lethal and sublethal effects, depending on the location, timing, and volume of the spills; the enviro nmental settings of the spills; and the species exposed to the spills. Overall, small and large oil spills are expected to have minor to moderate impacts to marine mammals, while impacts from cleanup activities are expec ted to be minor (USDOI, BOEM

, 2012

, p. 4

- 376). A catastrophic oil spill could result in moderate to major impacts on marine mammals, as there is greater potential for more severe and population

- level effects compared to a small or large oil spill ( USDOI, BOEM

, 2012

, p. 4

- 376). Marine mamm als could be impacted from vessel and aircraft noise associated with spill response

. These activities would have a minor effect (USDOI, BOEM, Alaska OCS Region, 2011

- c, pp. 89

- 108). T he following analysis describes the effects of small

, large , and catastr ophic oil spills on specific marine mammal species.

o Small oil spills would have a negligible effect on seal populations because the spill size would be insufficient to produce any population

- level effects on small or large groups of seals. Additionally, most scientific observation leads to the conclusion that seals have the ability to detect and avoid oil spills, and the weather ing process would most likely act to quickly break up or dissipate oil through the local environment to harmless residual levels that would eventually become undetectable ( USDOI, BOEM, Alaska OCS Region

, 2011

-

c , p. 93). Contact with oil from a large oil spill could affect individual seals in a variety of negative ways ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 93). Short

- term pop ulation impacts could result from exposure to oil, long

-28 term exposure to contaminants, and decreased availability of prey from a catastrophic oil spill ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 94). A small oil spill would dissipate over a few days and w ould result in a minor impact to individual walrus

, rather than a population

- level effect. A catastrophic oil spill could have moderate to major impacts to the walrus population if it were to occur in an area with a large concentration of the walrus popul ation ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 96).

o A small oil spill would have negligible effects on mysticete whales. Such a small spill would be insufficient to produce any population

- level effects on whales. Oil generally poorly adheres to the s kin of mysticete whales, and cetaceans are believed to have the ability to detect and avoid oil spills. Additionally, the weathering process should act to quickly break up or dissipate oil through the local environment to harmless residual levels that

wou ld eventually become undetectable. Moderate effects to mysticete whales from large oil spills are possible through direct contact, reduction of prey availability, toxic exposure, and disturbance from cleanup operations. A catastrophic oil spill could cau se significant direct and indirect effects under certain circumstances , such as very intense direct contact, reduction of prey availability, toxic exposure, and disturbance from cleanup operations. ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 103).

o Impact s to odontocetes from a small oil spill are unlikely because they are likely to avoid and disperse from areas with lots of human activity. We expect odontocetes to avoid the area of the spill as long as cleanup activities were ongoing. A large or catastr ophic oil spill could result in moderate impacts to odontocetes through skin contact, inhalation, or ingestion of contaminated prey, or exposure in open water, which would likely be limited to short term, nonlethal effects such as skin irritation ( USDOI, B OEM, Alaska OCS Region

, 2011

- c , p. 104).

o Given the dispersed distribution of polar bears, it is likely that a small spill persisting for less than 30 days would affect few polar bears, resulting in a minor level of effect on polar bears and no adverse imp act to critical habitat. If polar bears come into contact with oil from a large or catastrophic oil spill in water or on ice, their coats could become fouled. Polar bears rely on their thick fur to avoid hypothermia, and a heavily oiled bear would likely not survive. Polar bears could also ingest toxins while grooming or by foraging on seals that had become oiled. A large or catastrophic oil spill that came ashore or fouled a large area of sea ice could impact polar bears directly (and indirectly throug h their prey) and could result in moderate or major impacts to polar bears

, as well as adverse impacts to critical habitat ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 106).

• Assuming an incrementally greater risk absent the proposed rule, p otential impacts on sociocultural systems from accidental oil spills could vary from minor to major,29 depending on the size, location, and timing of a spill. The impacts of a small oil spill are likely to be minor to moderate, with some impact on subsistence resources suc h as marine mammals and birds. Animals could be oiled or spooked by hazing. However, resources should recover in less than a year. However, i mpacts of a large or catastrophic oil spill on important subsistence resources, such as whales (beluga and bowhe ad), walrus, seabirds, waterfowl, fish, and land mammals, and sociocultural systems could be major depending on timing and location, especially if intertidal zones, lagoons, and

estua ries were oiled (USDOI, BOEM

, 2012 , p. 4

- 568). The effects would be most serious if the release occurred during a whale migration and affected the migration route. Not only could contact with oil result in the deaths of some individual animals

, but Alaska N ative harvesters, perceiving the surviving oiled whales as tainted, al so would be hesitant to harvest them. Oil contamination of beaches would have a profound impact on whaling because, even if bowhead whales were not contaminated, Iñupiat subsistence whalers would not be able to bring them ashore and process them on a cont aminated shoreline (USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 114). A catastrophic oil spill could also result in the deaths of a large number of birds and, if breeding populations were affected, a serious reduction in the availability of waterfowl to su bsist ence harvesters (USDOI, BOEM

, 2012 , p. 4

- 569). These disruptions could cause breakdowns in family ties, compromise a community’s sense of well

- being, and damage sharing linkages with other communities. They could likewise curtail community activitie s and traditional practices for harvesting, sharing, and processing subsistence resources, which are interconnected with the subsistence lifestyles of Alaska Native communities ( USDOI, BOEM, Alaska OCS Region, 2011

- c , p. 117). The potential health effects of oil spills can disproportionately impact Alaska Natives, other minority population groups and low

income communities. These effects include those related to worker safety, toxicology in workers and community members, and mental health emanating from s ocial and economic disruption. This may disproportionately affect low income persons in the North Slope Borough (USDOI, BOEM

, 2012 , p. 3

- 413)

.

Additive Adverse Effects T hat C ould O ccur with P romulgation of T hese P rovisions of the R ule

While the PAA is e xpected to reduce or avoid some of the potential adverse environmental impacts associated with oil spills by reducing the likelihood of spills

, p roposed §§ 250.402(c) and 250.447 could also contribute to incremental or additive, adverse effects. The follo wing activities associated with requirements of this proposed rule could contribute to adverse effects: the prolonged use of equipment, such as vessels and aircraft, already on

- site, or the use of additional equipment

. The source document for the analysis below is USDOI

, BOEM ( 2011

- c )

. Additive, adverse effects could include the following:

• Air quality could be adversely affected by the introduction of additional emissions from aircraft and vessels during any increased operational time , or the use of addi tional vessels (pp. 65

- 71). However, any effects would be localized and temporary. Based on these factors and the short duration of the potential increased operational time, these activities would have a minor effect.

• Water quality could be adversely af fected by prolonged use of vessels or the use of30 additional vessels during any increased operational time (pp. 72

- 73)

. However, any effects would be localized and temporary. Based on these factors and the short duration of the potential increased operati onal time, these activities would have a minor effect.

• Marine and coastal birds could be adversely impacted from vessel and aircraft noise during any increased operational time or from use of additional vessels . Routine vessel traffic has limited pote ntial to disturb birds and could temporarily move them a short distance to another location (p. 84). Several species of birds, such as the spectacled and Steller’s eiders, could also be subject to vessel collisions during this time because they fly low an d fast over the ocean and often do not or cannot react in time to avoid vessels (p. 85). These effects would be localized and temporary. Based on these factors and the short duration of the potential increased operational time, these activities would hav e a minor effect.

• Fish could be adversely impacted from vessel and aircraft noise during any increased operational time or from use of additional vessels . Fish could also be indirectly affected by water quality degradation (pp. 89

- 108). These effects would be localized and temporary. Based on these factors and the short duration of the potential increased operational time, these activities would have a minor effect.

• Marine mammals could be adversely impacted from vessel and aircraft noise during any increased operational time or from use of additional vessels

. Vessel noise may contribute to an incremental increase in communication masking and limited behavioral disturbance related to noise exposure (pp. 90

- 91, 96

- 97, 99, and 101)

. Some species of m arine mammals could also be subject to vessel collisions during this time. Additionally, marine mammals could be indirectly affected by water quality degradation and impacts to prey species (pp. 89

- 108). These effects would be localized and temporary. B ased on these factors and the short duration of the potential increased operational time, these activities would have a minor effect.

• Increased use of vessels or use of additional vessels on the OCS caused by §§ 250.402(c) and 250.447 of the PAA would increase the risk of accidental discharges ( from collisions, allisions, vessel groundings, equipment failures, etc.)

. According to the United States Coast Guard (USCG) , the majority of the oil spills in U.S. waters between 1969 and 2011 involved discharg es between one and one hundred gallons ( USCG , 2012). Given this statisti c and the short duration of any increased operational time

, the possibility of a large or catastrophic oil spill from such accidents is unlikely. A small spill, which would be locali zed and temporary, would have minor effects on the marine environment.

• T he se provisions may prolong the timeframe needed to drill and subsequently complete a well ; thus

, a well that could typically be drilled in one season may potentially requir e two

seas ons to complete. Whenever a well is re

- entere d or operations are interrupted, the likelihood of a well integrity event that could lead to an accidental release is increased.31 Additive Adverse Effects: Cumulative Effects

In t he Chukchi Sea and Beaufort S ea Planning Area s there are few nearby industrial emission sources and no substantial population centers (USDOI, BOEM, Alaska OC S Region

, 2011

- a , p. 52). The main sources of impacts have been associated with oil

- and gas

- related activities, military opera tions, scientific research activities, climate change, and subsistence hunting and other activities associated with regional native villages ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. C

- 1 ). Marine vessel traffic in the area is mainly attributed to fishin g and hunting vessels, icebreakers, Coast Guard vessels, supply ships and barges with their associated towing vessels, and vessels supporting oil, gas, and research activities in the region. Marine vessel traffic has increased in recent years due to advan ces in the technology of ice strengthening and ice breaking capacities of marine vessels, receding ice cover as a result of climate change , and increased interest in scientific and economic pursuits in the area. Most observers expect these phenomena to co ntinue increasing ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , pp . C

- 1 and C

- 2). Air traffic has historically been limited to the movement of people and supply materials between industry operations, native villages, and military outposts. In recent years, ai r traffic has increased mostly from academic and commercial ventures and military operations. Air traffic is expected to continue at present levels for the reasonabl y foreseeable future ( USDOI, BOEM, Alaska OCS Region

, 2011

- c, p. C

- 2). Additionally, in t he winter months, the Arctic atmosphere becomes contaminated with pollution through long

- range transport of emissions from coal burning and metal smelting in Europe and Russia

, referred to as the Arctic haze.

• Air quality is well within the NAAQS and Stat e of Alaska AAQS (18 AAC 50). Impacts to air quality in the region can be attributed to various factors, including marine vessel and air traffic, the North Slope oil fields , and Arctic haze. All activities in the past and occurring now have caused little deterioration in air quality. Most observers do not expect this to change due to the reasonably foreseeable future of North Slope area activities, such as oil and natural gas development and production (USDOI, BOEM, Alaska OCS Region

, 2011

- b, p. 300). S ections 250.402(c) and 250.447 of the PAA could potentially give rise to the prolonged or additional use of marine vessels and aircraft, which could potentially deteriorate air quality. The additional air emissions would be relatively small compared with th os e from existing and projected activities in the area, and would be spatially and temporally limited. Therefore, cumulative impacts on air quality from these provisions of the PAA would be minor.

• Impacts to water quality are associated with climate ch ange, industry

- , community

- , military

- , and research

- related discharges, and naturally occurring processes. As mentioned earlier, marine vessel traffic has increased in recent years and is expected to increase in the future. This increases the risk of ve ssel accidents, vessel groundings, potential oil and cargo spills, permitted discharges, and introduction of marine invasive species. Future impacts to water quality would be caused primarily by the effects of climate change and ocean acidification on oce an chemistry, discharge of pollution into marine waters from point

- source and nonpoint

- source discharges, and oil industry

- related activities such as drilling operations and support vessel discharges ( USDOI, BOEM, Alaska OCS Region

, 2011

- b, p. 300). Altho ugh §§ 250.402(c) and 250.447 of the PAA could result in additional vessel traffic in the area s surrounding the exploration drill ing32 sites for a short period of time, this increase would be negligible compared to existing and future activities in the area. Therefore, cumulative impacts on water quality from these provisions of the PAA would be minor. Further, they are designed to reduce the likelihood of oil spills that could result in adverse cumulative impacts on water quality.

• Cumulative impacts on bi rd species result from direct injury or mortality of marine and coastal birds due to collisions with onshore and offshore structures, digestion of trash or debris, or exposure to discharges or emissions; loss or degradation of habitat due to coastal develo pment, climate change, or construction and operations activities; and behavioral disturbances due to commercial and recreational boating and small aircraft traffic ( USDOI, BOEM

, 2012

, p. 4

- 886). Many bird species are currently experiencing a loss or degra dation of habitat due to land development and climate change

, and these impacts , along with impacts from oil and gas development and marine vessel and air traffic, are expected to continue into the foreseeable future ( USDOI, BOEM

, 2012

, p p . 4

- 886 and 4

- 88 7 ). Sections 250.402(c) and 250.447 of the PAA could result in additional vessel and air traffic in the area s surrounding the exploration drill ing sites for a short period of time. However, the increase in traffic would be negligible compared to existing and future activities in the region. Therefore, cumulative impacts on marine and coastal birds from these provisions of the PAA would be minor. Further, they are designed to reduce the likelihood of oil spills that could result in adverse cumulative impa cts on birds.

• Fish and EFH in the region have been impacted by various activities such as subsistence fishing, commercial shipping, coastal modifications, hardrock mining, dredging and disposal operations, anchoring, and climate change ( USDOI, BOEM

, 2012

, p. 4

- 809). As mentioned above, the number of marine vessels in the region will continue to increase, which could cause impacts to fish via water quality deterioration from potential cargo and oil spills and permitted discharges, noise, and the introducti on of marine invasive species. Climate change is anticipated to cause major effects in the future, including warming sea surface, reduction in sea ice, and increased ocean water acidity. These factors are affecting and will continue to affect fish and fi sh habitat in a substantial way ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 83). Subsistence fishing in the region is likely to continue at a similar level ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 83). Sections 250.402(c) and 250.447 of the PAA could result in additional vessel traffic in the area s surrounding the exploration drill ing sites for a short period of time. However, the increase in traffic would be negligible compared to existing and future activities in the area. Therefore, cumulative imp acts on fish and EFH from these provisions of the PAA would be minor. Further, they are designed to reduce the likelihood of oil spills that could result in adverse cumulative impacts on fish and EFH.

• Ongoing and future activities or phenomena that affec t marine mammals in Ar c tic waters include : onshore and offshore oil and gas development (and infrastructure); other kinds of onshore development on or near riverine systems flowing into Arctic waters; marine vessel traffic; commercial, recreational, and su bsistence fishing; marine mammal subsistence harvests; pollution (and marine debris); climate change; diseases; and natural catastrophes (USDOI, BOEM

, 2012 , p. 4

- 885). Decreasing sea ice is changing patterns of33 habitat use for marine mammals, increasing th e available range of some whales but decreasing available habitat for ice seals, polar bears, and walrus. Changes in sea

- ice extent related to climate change are altering the behavior and foraging opportunities of some marine mammal species, such as the w alrus and polar bear ( USDO I, BOEM, Alaska OCS Region

, 2011

- c , p. 107). Activities entailing the use of marine vessels and aircraft can impact marine mammals by temporarily altering their behavior. Potential behavior changes include deflections away from vessels or aircraft, cessation of calling, masking of received sounds, temporary separations of mother/calf pairs

, and interruptions of foraging, resting

, or other behaviors, all of which have energetic costs ( USDOI, BOEM, Alaska OCS Region

, 2011

- c , p. 107 ). Sound specifically has the potential to cause deflection of whales from hunting and migration areas, masking of environmental sounds and intra

- species communication, and physiological damage to marine mammal hearing ( USDOI, BOEM, Alaska OCS Region

, 201 1

- c , p. 89). Accidental vessel collisions with marine mammals are another concern, especially during inclement weather conditions. We expect these activities and phenomena to continue (and increase) in the foreseeable future (USDOI, BOEM, Alaska OCS Regi on , 2011

- a, p. 67). Sections 250.402(c) and 250.447 of the PAA could result in additional vessel and air traffic in the

area s surrounding the exploration drill ing sites for a short period of time. However, the increase in traffic would be negligible comp ared to existing and future activities in the area. Therefore, cumulative impacts on marine mammals from these provisions of the PAA would be minor. Further, they are designed to reduce the likelihood of oil spills that could result in adverse cumulative impacts on marine mammals.

Reducing the Size and/or Duration of an Oil Spill

Summary D escription :

§ 250.471 What are the requirements for Arct ic OCS s ource control and containment equipment ? § 250.472 What are r elief rig requirements for the Arct ic OCS? § 254.90 What are the additional requirements for e xercises for your response personnel and equipment for facilities conducti ng exploratory drilling from a MODU on the Arctic OCS?

Proposed § 250.471 would require operators using a MODU for Arctic OCS exploratory drilling to have access to, and the ability to deploy SCCE (e.g., a capping stack, cap and flow system, and containment dome) within specified timeframes when drilling or working below the surface casing

. Proposed § 250.471 would r equire operators to demonstrate that they would have access to, and could deploy, well control and containment resources that would be adequate to promptly respond to a loss of well control. Ensuring that operators have redundancies in place is critical,

as there is no guarantee that a ny measure could control or contain a worst

- case discharge scenario.

Proposed § 250.472 would require Arctic OCS exploratory drilling operators drilling or working below the surface casing to have access to a separate r elief rig that would be staged at a location such that it could arrive on site and be capable of drilling a relief well under anticipated Arctic34 OCS conditions within specified timeframes. Although SCCE may, in some circumstances, be able to contain or es tablish control over a well after a blowout, in some cases only a relief well will be able to kill and permanently plug a n out

- of

- control well. Thus, it is crucial that operators have access to a relief rig capable of drilling a relief well, if needed, be fore the seasonal ice encroachment. This provision addresses the geographical and logistical challenges of bringing equipment and resources into the region, especially when the time available to mount response operations is limited by changing weather and ice conditions as the end of the drilling season approaches.

Proposed § 254.90 would require Arctic OCS exploratory drilling operators to incorporate additional elements into their oil spill response training and exercise activities and provide notice of the commencement and cessation of covered operations, and would clarify the authority of the Regional Supervisor to conduct exercises, prior to and during exploratory drilling operations, to test response preparedness.

Environmental Analysis :

§ 250.47 1 What are the requirements for Arctic OCS source control and containment equipment? § 250.472 What are relief rig requirements for the Arctic OCS? § 254.90 What are the additional requirements for exercises for your response

perso nnel and equipment for facilities conducti ng exploratory drilling from a MODU on the Arctic OCS?

These provisions are designed to reduce the duration and/or magnitude of a potential oil spill and therefore lessen or potentially avoid resulting environmen tal effects. The se provisions are not designed to reduce the possibility of a spill occurring like the provisions discussed previously ( proposed §§ 250.402(c), 250.447, 250.452, and 250.473) . However, both sets of provisions would reduce the likelihood o f potential environmental effects from an oil spill. Therefore, the preceding environmental analysis of potential beneficial effects of proposed §§ 250.402(c), 250.447, 250.452, and 250.473 is generally applicable to these provisions. In summary, e ffects potentially reduced or avoided through promulgation of these provisions of the rule could include direct and indirect impacts to air and water quality; coastal, benthic, and pelagic habitat; and invertebrates, fish, EFH, coastal and marine birds, marine m ammals, and sociocultural systems. The effects of these avoided impacts range from negligible to major depending on the size , timing, and location of the avoided (or reduced) oil spill.

While these provisions of the PAA are designed to reduce the duratio n and/or magnitude of a potential oil spill from Arctic OCS exploratory drilling operations, there are some potential adverse environmental effects associated with these provisions. The potential environmental effects associated with proposed §§ 250.471 a nd 250.472 would result from the additional vessels

, aircraft

, and /or operational time that may be needed to comply with the staging and deployment requirements for SCCE and relief rigs when an operator is drilling below or working below the surface casing in an exploratory well

. While it is possible that the proposed requirements could be satisfied through strategic use of vessels and operational time already contemplated in drilling plans, there is a reasonable likelihood that additional vessels and/or35 o perational time may be needed. For example, under proposed § 250.471, operators c ould need

access to a nother vessel to store and deploy a capping stack and containment dome , a vessel to receive fluids from the cap and flow system or containment dome , etc. The potential environmental effects associated with proposed § 254.90 would also result from the additional deployment of vessels and equipment to participate in oil spill response training and exercise activities. These provisions ha ve the potential to increase operational time on the OCS and the number and use of vessels, aircraft, and other equipment in similar ways to other provisions previously discussed. As such , the preceding environmental analysis for proposed §§ 250.402(c) and 250.447 effective ly analyzes the potential adverse environmental effects associated with these proposed provisions. I ncreased or additional use of vessels, aircraft, and other equipment could cause adverse direct and indirect impacts on air and water quality

, marine and c oastal birds, fish, and marine mammals. These effects would be localized and temporary. Therefore, these proposed provisions of the rule would have a minor effect on the marine environment. Additionally, t he cumulative impact analysis from the preceding analysis determined that cumulative impacts on air and water quality, fish and EFH, marine and coastal birds, and marine mammals from comparable requirements of the PAA would be minor. That conclusion holds for these proposed provisions meant to reduce t he size or duration of a spill

.



### 5. **1**

**. 4**  **Effects Summary**

The PAA is designed to increase environmental protection and reduce the likelihood and severity of potential impacts on the environment resulting from Arctic OCS exploratory drilling operations

. The provisions would largely contribute to the avoidance or minimization of effects that would otherwise occur. However, p roposed §§ 250.300, 250.402, 250.447, 250.471, 250.472, and 254.90 could cause minor, adverse environmental effects

.



### 5. 2 Alternative B

– Proposed Rulemaking Excluding the Requirement for More Frequent Blowout Preventer Testing

Under Alternative B , the proposed rule would be promulgated with the exception that the proposed change to 30 CFR 250.447 (b) , which would increase the BOP pressure testing frequency for exploratory drilling operations in the Alaska Arctic OCS from every 14 days to

every seven days , would not take place . The environmental analysis provided above for the PAA remains the same under Alternative B except that the potenti al enviro nmental effects

— whether adverse or beneficial

— associated with the implementation of proposed § 250.447 (b) (as summarized above un der the PAA) would not occur , and the environmental effects associated with existing standards would remain.



### 5.3 Alt ernative C

– No Action Alternative (NAA)

Under the NAA, the proposed rule would not be promulgated. Any future exploration drilling on the Arctic OCS would be governed by the existing regulatory framework, potentially causing36 effects comparable to those d escribed in previous Arctic OCS NEPA documents ( S ee USDOI, BOEM, Alaska OCS Region

, 2011

- a; USDOI, BOEM, Alaska OCS Region

, 2011

- b; USDOI, BOEM, Alaska OCS Region

, 2011

- c; USDOI, BOEM

, 2012 ; USDOI, MMS , Alaska OCS Region

, 2008)

. No substantially different effects to the environment would occur compared to those analyzed in the existing NEPA documents cited above. Selection of the NAA would not reduce the likelihood or severity of impacts on the Arctic environment vis

- à

- vis existing rules. Accordingly, th e NAA would forego the potential benefits of reduced or avoided environmental effects anticipated from the PAA. The NAA would also obviate the limited potential adverse effects anticipated from the PAA.37 

## 6.0 Literature Cited

Jay , C

. V., A.S. Fischbach, and A.A. Kochnev. 2012. Walrus A reas of U se in the Chukchi Sea
D uring S parse S ea I ce C over . Mar ine Ecology Progr ess Serie s 468:1

- 13.

Thewissen, J.G.M., J. George, C. Rosa, and T. Kishida. 2011. Olfaction and B rain S ize in the
B owhead W hale ( Balaena mysticetu s ). Marine Mammal Science 27:282

- 294.

USCG. 2012. Polluting Incidents I n and Around U.S. Waters

– A Spill/Release Compendium: 1969

- 2011.

USDOI, BOEM, Alaska OCS Region. 2011

- a. Beaufort Sea Planning Area, Beaufort Sea Lease Sales 195 & 202, Shell Re vised Beaufort Sea Exploration Plan, Environmental Assessment. OCS EIS/EA BOEMRE 2011

- 039. Anchorage, AK: USDOI, BOEM, Alaska OCS Region

,
USDOI, BOEM, Alaska OCS Region

. 2011

- b. Chukchi Sea Planning Area, Sale 193 Final Supplemental Environmental Im pact Statement. Vol. 1 . OCS EIS/EA BOEMRE 2011

- 041

. Anchorage, AK: USDOI, BOEM, Alaska OCS Region

.
USDOI, BOEM, Alaska OCS Region. 2011

- c . Chukchi Sea Planning Area, Chukchi Lease Sale 193, Shell Revised Chukchi Sea Exploration Plan, Environmental Ass essment. OCS EIS/EA BOEM 2011

- 061 Anchorage, AK: USDOI, BOEM, Alaska OCS Region

.
USDOI, BOEM. 2012. Outer Continental Shelf Oil & Gas Leasing Program: 2012

- 2017, Final Programmatic Environmental Impact Statement

, OCS EIS/EA BOEM 2012

- 030

.

USDOI, BOEM , an d BSEE . 2013. Report to the Secretary of the Interior: Review of Shell’s 2012 Alaska Offshore Oil and Gas Exploration Program. http://www. bsee.gov/uploadedFiles/BSEE/BSEE_Newsroom/Press_Releases/2013/Shell

report

- 3

- 8

- 13

- Final.pdf

USDOI, BSEE and BOEM. 2014. 30 CFR Part 250, 254, and 550 (Oil and Gas and Sulphur Operations on the Outer Continental Shelf

– Requirements for Exploratory Drilli ng on the Arctic Outer Continental Shelf

- Proposed Rule) (February 9 , 201 5 )

.

USDOI, MMS , Alaska OCS Region. 2008. Beaufort and Chukchi Sea Planning Areas

, Draft Environmental Impact Statement. Vol. 1. OCS EIS/EA MMS 2008

- 0055. Anchorage, AK: USDOI, MMS, Alaska OCS Region

.

USEPA

, 2014. Arctic Oil and Gas Exploration General Permits. http://yosemite.epa.gov/r10/water.nsf/NPDES+Permits/arctic

- gp38 

## 7.0 P reparers

Stepha nie Fiori

— Environmental Protection Specialist, Division of Environmental Assessment, Office of Environmental Programs

Tim Holder

— Arctic Liaison, Division of Environmental Assessment, Office of Environmental Programs

Connie Murphy

— Technical Writer/Editor, Division of Environmental Assessment, Office of Environmental Programs39 

## Appendix A

. Regulatory Provisions of the Proposed Rule (Version 2 .9.15 )

PART 250

— OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF

1. The authority citation for 3 0 CFR Part 250 is amended to read as follows:

Authority: 30 U.S.C. 1751, 31 U.S.C. 9701, 33 U.S.C. 1321(j)(1)(C),

43 U.S.C. 1334.

2. Amend § 250.105 by:

a. Revising the definition of “District Manager” and

b. Adding new definitions for “Arctic OCS”, “Arctic OCS Conditions”, “Cap and Flow

System”, “Capping Stack”, “Containment Dome” and “Source Control and Containment

Equipment (SCCE)” in alphabetical order, to read as follows:

§ 250.105 Definitions

.

* * * * *

Arctic OCS means the Beaufort Sea and Ch ukchi Sea Planning Areas, as described in the

Proposed Final OCS Oil and Gas Leasing Program for 2012

- 2017 (June 2012).

Arctic OCS Conditions mean s, for the purposes of this Part, the conditions operators can

reasonably expect during operations on the Arc tic OCS. Such conditions, depending on the time

of year, include, but are not limited to: extreme cold, freezing spray, snow, extended periods of

low light, strong winds, dense fog, sea ice, strong currents, and dangerous sea states. Remote

location, re lative lack of infrastructure, and the existence of subsistence hunting and fishing areas

are also characteristic of the Arctic region

.

* * * * *

Cap and Flow System means an integrated suite of equipment and vessels, including a40 capping stack and associated flow lines , that

, when installed or positioned

, is used to control the

flow of fluids escaping from the well by conveying the fluids to the surface to a vessel or facility

equipped to process the flow of oil, gas, and water. A cap and f low sys tem is a high pressure

system that includes the capping stack and piping necessary to convey the flowing fluids through

the choke manifold to the surface equipment.

Capping Stack means a mechanical device that can be installed on top of a subsea or surfac e

wellhead or blowout preventer to stop the uncontrolled flow of fluids into the environment.

* * * * *

Containment Dome means a non

- pressurized container that can be used to collect fluids

escaping from the well or equipment below the sea surface or from seeps by suspending the

device over the discharge or seep location. The containment dome includes all of the equipment

necessary to capture and convey fluids to the surface.

* * * * *

District Manager means the BSEE officer with authority and responsibi lity for operations or

other designated program functions for a district within a BSEE Region. For activities on the

Alaska OCS, any reference in this part to District Manager means the BSEE Regional

Supervisor.

* * * * *

Source Control and Containment E quipment (SCCE) means the capping stack, cap and flow

system, containment dome, and/or other subsea and surface devices, equipment, and vessels

whose collective purpose is to control a spill source and stop the flow of fluids into the

environment or to con tain fluids escaping into the environment. “ S urface devices” refers to

equipment mounted or staged on a barge

, vessel , or facility to separate, treat, store and /or dispose41 of fluids conveyed to the surface by the cap and flow system or the containment dom e. “ S ubsea

devices” includes, but is not limited to, remotely operated vehicles

, anchors, buoyancy

equipment, connectors, cameras, controls and other subsea equipment necessary to facilitate the

deployment, operation and retrieval of the SCCE. The SCCE d oes not include a blowout

preventer.

* * * * *

3. Revise § 250.188 by adding a new paragraph (c) to read as follows:

§ 250.188 What incidents must I report to BSEE and when must I report them?

* * * * *

(c) On the Arctic OCS, in addition to the requir ements of paragraphs (a) and (b) of this section,

you must provide to the BSEE inspector on location, if one is present

, or to the Regional

Supervisor both of the following :

(1) An immediate oral report if any of the following occur:

( i) A ny sea ice mo vement or condition that has the potential to affect your operation or trigger

ice management activities ;

( ii) T he start and termination of ice management activities ; or

(iii) Any “kicks” or operational issues that are unexpected and could result in th e loss of well

control

.

(2) W ithin 24 hours after completing ice management activities, a written report of such

activities that conforms to the content requirements in § 250.190.

4. Revise § 250.198 by adding paragraph (h)(89) to read as follows:42 § 250.19 8 Documents incorporated by reference.

* * * * *

(h) * * *

(h)(89) API RP 2N, Third Edition, “Recommended Practice for Planning, Designing, and

Constructing Structures and Pipelines for Arctic Conditions;” incorporated by reference at

§ 250.470( g );

* * * * *

5. Revise § 250.300 paragraphs (b)(1) and (b)(2) by adding regulatory text to read as follows:

§ 250.300 Pollution p revention

* * * * *

(b)(1) * * * For Arctic OCS explorat ory drilling, you must capture all petroleum

- based mud to

preve nt its discharge into the marine environment. The Regional Supervisor may also require

you to capture , during your Arctic OCS exploratory drilling operations, all water

- based mud

from operations after completion of the hole for the conductor casing to pre vent its discharge

into the marine environment, based on various factor s including, but not limited to:

(i) The proximity of your exploratory drilling operation to subsistence hunting and fishing

locations;

(ii) The extent to which discharged mud may c ause marine mammals to alter their migratory

patterns in a manner that impedes subsistence users’ access to

, or use of

, those resources

, or

increases the risk of injury to subsistence users; or

(iii) The extent to which discharged mud may adversely affec t marine mammals, fish, or their

habitat.

(b)(2) * * * For Arctic OCS explorat ory drilling

, you must capture all cuttings from operations43 that utilize petroleum

- based mud to prevent their discharge into the marine environment. The

Regional Supervisor may also require you to capture , during your Arctic OCS exploratory

drilling operations, all cuttings from operations that utilize water

- based mud after completion of

the hole for the conductor casing to prevent their discharge into the marine environment , based

on various factors including, but not limited to:

(i) The proximity of your exploratory drilling operation to subsistenc e hunting and fishing

locations;

(ii) The extent to which discharged cuttings may cause marine mammals to alter their migrat ory

patterns in a manner that impedes subsistence users’ access to

, or use of

, those resources

, or

increases the risk of injury to subsistence users; or

(iii) The extent to which discharged cuttings may adversely affect marine mammals, fish, or

their hab itat.

* * * * *

6. Revise § 250.402 by adding a new paragraph (c) to read as follows:

§ 250.402 When and how must I secure a well?

* * * * *

(c) For Arctic OCS exploratory drilling operations

, i n addition to the requirements of paragr aphs

(a) and (b) of this section :

(1) I f you move your drilling rig off a well prior to completion or permanent abandonment, y ou

must ensure that any equipment left on , near, or in a well bore that has penetrated below the

surface casing is positioned in a manner to:

(i) protect the well head; and

(ii) prevent or minimize the likelihood of compromising the down

- hole integrity of the well or44 the effectiveness of the well plugs.

(2) In areas of ice scour, you must use a well mudline cellar or an equiv alent means of

minimizing the risk of damage to the well head.

7. Revise § 250.418 by adding a new paragraph (k) to read as follows:

§ 250.418 What additional information must I submit with my APD?

* * * * *

(k) For Arctic OCS exploratory dril ling operations, you must provide the information required

by § 250.470.

8. Revise § 250.447 paragraph (b) to read as follows:

§ 250.447 When must I pressure test the BOP system?

* * * * *

(b) Before 14 days have elapsed since your last BOP pr essure test

, or for Arctic OCS

explorat ory drilling operations before 7 days have elapsed since your last BOP pressure test.

You must begin to test your BOP system before midnight on the 14 th day (or for Arctic OCS

exploratory drilling operations, the 7 th day) following the conclusion of the previous test

.
However, the District Manager may require more frequent testing if conditions or BOP

performance warrant; and

* * * * *

9. Add new § 250.452 to read as follows:

§ 250.452 What are the real

- ti me monitoring requirements for Arctic OCS exploratory

drilling operations?

(a) When conducting exploratory drilling operations on the Arctic OCS, you must have real

time data gathering and monitoring capability to record, store, and transmit data regardi ng all45 aspects of:

(1) The BOP control system;

(2) The well’s fluid handling systems on the rig; and

(3) The well’s downhole conditions as monitored by a downhole sensing system, when such a

system is installed.

(b) During well operations, you must immediately transmit the data identified in paragraph

(a) of this section to a designated onshore location where it must be stored and monitored by

qualified personnel who have the capability for continuous contact with rig personnel and who

have the autho rity, in consultation with rig personnel, to initiate any necessary action in response

to abnormal data or events

. Prior to well operations, you must notify BSEE where the data will

be monitored during those operations , and you must make the data availabl e to BSEE , including

in real time, upon request. After well operations, you must store th e data at a designated location

for recordkeeping purposes as required in §§ 250.466 and 250.467

.
10. Add new undesignated centered heading “ADDITIONAL ARCTIC OCS

R EQUIREMENTS” and §§ 250.470 through 250.473 in Subpart D to read as follows:

ADDITIONAL ARCTIC OCS REQUIREMENTS

§ 250.470 What additional information must I submit with my APD for Arctic O CS

exploratory drilling operations?

In addition to all other appli cable requirements included in this Part, you must provide with your

APD all of the following information pertaining to your proposed Arctic OCS exploratory

drilling:

(a) A detailed description of:

(1) the environmental, and meteorologic and oceanic con ditions you expect to encounter at46 the well site(s);

(2) how your equipment , materials, and drilling unit will be prepared for service in the

conditions in (a) (1) of this section, and how your drilling unit will be in compliance with the

requirements of § 250.4 17 of this Part.

(b) A detailed description of all operations necessary in Arctic OCS Conditions to transition the

rig from being under way to conducting drilling operations and from ending drilling operations

to being under way , as well as any a nticipated repair and maintenance plans for the drilling unit

and equipment. The description should include, but not be limited to:

(1) r ecovering the subsea equipment, including the m arine r iser and the lower marine riser

package ;

(2) recovering the BO P;

(3) recovering the auxiliary sub

- sea controls and template;

(4) laying down the drill pipe and securing the drill pipe and marine riser;

(5) securing the drilling equipment;

(6) transferring the fluids for transport or disposal;

(7) securing ancill ary equipment like the draw works and lines;

(8) refueling or transferring fuel;

(9) offloading waste;

(10) recovering the ROVs;

(11) picking up the oil spill prevention booms and equipment; and

(12) offloading the drilling crew

.

(c) Well

- specific d rilling objectives

, timelines

, and updated contingency plans for temporary

abandonment of the well , including but not limited to the following:47 (1) W hen you will spud the particular well ( i.e., begin drilling operations at the well site)

identified in the APD;

(2) H ow long you will take to drill the well;

(3) Anticipated depths and geologic targets, with timelines;

(4) When you expect to set and cement each string of casing ;

(5) When and how you would log the well;

(6) Your plans to test the well;

(7 ) When and how you intend to abandon the well, including specifically addressing your plans

for how to move the rig off location and how you will meet the requirements of § 250.40 2 (c) ;

(8) A description of what equipment and vessels will be involved in the process of temporarily

abandoning the well due to ice; and

(9) An explanation of how these elements will be integrated into your overall program.

(d) A detailed description of your weather and ice forecasting capability for all pha ses of the

drilli ng operation, including:

(1) how you will ensure continuous awareness of potential weather and ice hazards at, and

during transition between, wells;

(2) your plans for managing ice hazards and responding to weather events ; and

(3) ver ification that you have the capabilities described in your BOEM

- approved EP.

( e ) A detailed description of how you will comply with the requirements of § 250.472 of this

part.

( f

) A statement that you own, or have a contract with a provider for, source control and

containment equipment (SCCE) that is capable of controlling and/or containing a worst case

discharge, as described in your BOEM

- approved EP, w hen proposing to use a MODU to conduct48 exploratory drilling operations on the Arctic OCS . The follow ing information must be included

in your SCCE submittal:

( 1) A detailed description of your or your contractor’s SCCE capabilities, including operating

assumptions and limitations, reflecting that you have access to

, and the ability to deploy in

accordan ce with § 250.471, all SCCE necessary to regain control of the well, including the

ability to evaluate the performance of the well design to determine how a full shut

- in can be

achieved without having reservoir fluids discharged into the environment;

( 2) An inventory of the local and regional SCCE, supplies, and services that you own or for

which you have a contract with a provider . You must identify each supplier of such equipment

and services and provide their locations and telephone numbers;

( 3) Whe re applicable, p roof of contracts or membership agreements with cooperatives, service

providers, or other contractors that will provide you with the necessary SCCE or related supplies

and services if you do not possess them . The contract or membership agr eement must include

provisions for ensuring the availability of the personnel and/or equipment on a 24

- hour per day

basis while you are drilling below or work ing below the surface casing ;

( 4) A detailed description of the procedures for inspecting, testi ng, and maintaining your SCCE ;

and

( 5) A detailed description of your plan to ensure that all members of your operating team who

are responsible for operating the SCCE have received the necessary training to deploy and

operate such equipment in Arctic OC S Conditions and demonstrate ongoing proficiency in

source control operations. You must also identify and include the dates of prior and planned

t raining.

(g) Where it does not conflict with other requirements of this Subpart, and except as provided49 bel ow, you must comply with the requirements of API RP 2N, Third Edition “Planning,

Designing, and Constructing Structures and Pipelines for Arctic Conditions” (incorporated by

reference as specified in § 250.198), and provide a detailed description of how yo u will utilize

the best practices included in API RP 2N during your exploratory drilling operations. You are

not required to incorporate the following sections of API RP 2N into your drilling operations:

(1) Sections 6.6.3 through 6.6.4;

(2) The found ation recommendations in Section 8.4;

(3) Section 9.6;

(4) The recommendations for permanently moored systems in Section 9.7;

(5) The recommendations for pile foundations in Section 9.10;

(6) Section 12;

(7) Section 13.2.1;

(8) Sections 13.8.1. 1, 13.8.2.1, 13.8.2.2, 13.8.2.4 through 13.8.2.7;

(9) Sections 13.9.1, 13.9.2, 13.9.4 through 13.9.8;

(10) Sections 14 through 16; and

(11) Section 18.

§ 250.471 What are the requirements for Arctic OCS source control and containment?

Y ou must meet the following requirements for all exploration wells drilled on the Arctic

OCS :

(a) If you use a MODU when drilling below or working below the surface casing, you must

have access to:

(1) A capping stack

, position ed to ensure that it will arriv e at th e well location within 24

hours after a loss of well control and can be deployed as directed by the Regional Supervisor50 pursuant to paragraph (h) of this section ;

(2) A cap and flow system

, position ed to ensure that it will arrive at the well location wi thin 7

days after a loss of well control and can be deployed as directed by the Regional Supervisor

pursuant to paragraph (h) of this section . The cap and flow system must be designed to capture

at least the amount of hydrocarbons equivalent to the calcul ated worst case discharge rate

referenced in your BOEM

- approved EP ; and

(3) A containment dome

, position ed to ensure that it will arrive at the well location within 7

days after a loss of well control and can be deployed as directed by the Regional Super visor

pursuant to paragraph (g) of this section

. The containment dome must have the capacity to pump

fluids without relying on buoyancy.

(b) You must conduct a monthly stump test of dry

- stored capping stacks. If you use a pre

positioned capping stack, you must conduct a stump test prior to each installation on each well.

(c) As required by § 250.465(a), if you propose to change your well design, you must submit

an APM. For Arctic OCS operations, your APM must include a reevaluation of your SCCE

capab ilities for any new WCD rate, and a demonstration that your SCCE capabilities will meet

the criteria in § 250.470( f ) under the changed well design.

(d) You must conduct tests or exercises of your SCCE, including deployment of your SCCE,

when directed by the Regional Supervisor.

(e) You must maintain records pertaining to testing, inspecti on , and maintenance of your

SCCE for at least 10 years and ma k e the records available to any authorized BSEE representative

upon request.

(f) You must maintain record s pertaining to the use of your SCCE during testing

, training

,
and deployment activities for at least 3 years and ma k e the records available to any authorized51 BSEE representative upon request.

(g) Upon a loss of well control, you must initiate transit of all SCCE identified in paragraph

(a) of this section to the well

.

(h) You must deploy and use SCCE when directed by the Regional Supervisor.

§ 250.472 What are the relief rig requirements for the Arctic OCS?

(a) In the event of a loss of well contr ol, t he Regional Supervisor may direct you to drill a

relief well using the relief rig described in your APD

. Your relief rig must comply with all other

requirements of this Part for drilling operations, and it must be able to drill a relief well under

an ticipated Arctic OCS Conditions.

(b) When you are drilling below or working below the surface casing during Arctic OCS

exploratory drilling operations

, you must have access to a relief rig , different from your primary

drilling rig, staged in a location s uch that it can arrive on site, drill a relief well, kill and abandon

the original well, and abandon the relief well prior to expected seasonal ice encroachment at the

drill site, but no later than 45 days after the loss of well control.

(c) Operators ma y request approval of alternative compliance measures to the relief rig

requirement in accordance with § 250.141.

§ 250.473 What must I do to protect health, safety, property, and the

environment while operating on the Arctic OCS?

In addition to the re quirements set forth in § 250.107, when conducting exploratory drilling

operations on the Arctic OCS, you must protect health, safety, property, and the environment by

using the following:

(a) E quipment and materials that are rated or de

- rated for servic e under conditions that can be

reasonably expected during your operations; and52 (b) M easures to address human factors associated with weather conditions that can be

reasonably expected during your operations includ ing, but not limited to, provision of pro per

attire and equipment, construction of protected work spaces, and management of shifts

.

11. Revise § 250.1920 by:

a. Amending paragraphs (b)(5), (c), and (d), by adding a new last sentence, and

b. Adding new paragraphs (e) and (f) to read as foll ows:

§ 250.1920 What are the auditing requirements for my SEMS program?

* * * * *

(b) * * *

(5) * * * For exploratory drilling operations taking place on the Arctic OCS, you must

conduct an audit, consisting of an onshore portion an d an offshore portion, including all related

infrastructure, once per year for every year in which drilling is conduct e d.

* * * * *

(c) * * * For exploratory drilling operations taking place on the Arctic OCS, you must submit

an audit report of the audit findings, observations, deficiencies and conclusions for the onshore

portion of your audit no later than March 1 in any year in which you plan to drill, and for the

offshore portion of your audit, within 30 days of the close of the audit.

(d) * * * For exploratory drilling operations taking place on the Arctic OCS, you must

provide BSEE with a copy of your CAP for addressing deficiencies or nonconformities identified

in the onshore portion of the audit no later than March 1 in any year in which you plan to drill,

and for the offshore portion of your audit, within 30 days of the close of the audit.

(e) For exploratory drilling operations taking place on the Arctic OCS, during the offshore

portion of each audit, 100 percent of the faciliti es operated must be audited while drilling53 activities are underway. The offshore portion of the audit for each facility must be started and

closed within 30 days after the first spudding of the well or entry into an existing wellbore for

any purpose from that facility.

(f) For exploratory drilling operations taking place on the Arctic OCS, if BSEE determines that

the CAP or progress toward implementing the CAP is not satisfactory, BSEE may order you to

shut down all or part of your operations

.

PART 254

– OIL

- SPILL RESPONSE REQUIREMENTS FOR FACILITIES LOCATED

SEAWARD OF THE COAST LINE

1 2 . The authority citation for 30 CFR Part 254 continues to read as follows:

Authority: 33 U.S.C. 1321.

13. Amend § 254.6 by:

a. Revising the definition of “Adverse we ather conditions,”

b. Adding a new definition for “Arctic OCS” in alphabetical order, and

c. Adding a new definition for “Ice intervention practice s ” in alphabetical order.

§ 254.6 Definitions.

* * * * *

Adverse w eather c onditions mean s, f or the purposes of this Part, weather conditions found in

the operating area that make it difficult for response equipment and personnel to clean up or

remove spilled oil or hazardous substances. T hese conditions include, but are not limited to:

f

og, inh ospitable water and air temperatures, wind, sea ice, extreme cold, freezing spray, snow,

currents, sea states, and extended periods of low light. Adverse weather condition s do not refer

to conditions under which it would be dangerous or impossible to resp ond to a spill, such as a

hurricane.54 Arctic OCS means the Beaufort Sea and Chukchi Sea Planning Areas, as described in the

Proposed Final OCS Oil and Gas Leasing Program for 2012

- 2017 (June 2012)

.

* * * * *

Ice i ntervention p ractice s means the equipment, vessels, and procedures used to increase oil

encounter rates and the effectiveness of spill response techniques and equipment when sea ice is

present.

* * * * *

14. Add § 254.55 to Subpart D to read as follows: § 254.55 Spill respo nse plans for facilities locat ed in Alaska State waters

seaward of the coast line in the Chukchi and Beaufort Seas

.
Response plans for facilities conducting exploratory drilling operations from a MODU

seaward of the coast line in Alaska State waters in the Chukchi and Beaufort Seas must follow

the requirements contained within Subpart E

-- Oil Spill Response Requirements for Facilities

Located on the Arctic OCS, in addition to the other requirements of this subpart

. Such r esponse

plan s must address how the source control procedures selected to comply with State law will be

integrated into the planning, training, and exercise requirements of §§ 254.70(a), 254.90(a), and

254.90(c) i n the event that the proposed operations do not incorporate the capping stack, cap and

flow system, containment dome, and/or other similar subsea and surface devices and equipment

and vessel s referenced in those Sections

.
15. Add new Subpart E to read as follows:

Subpart E

— Oil

- Spill Response Requirements for Facilities Located on t he Arctic OCS

§ 254.65 Purpose

.
This subpart describes the additional requirements for preparing spill response plans and

maintaining oil spill preparedness for facilities conducting exploratory drilling operations from a55 MODU on the Arctic OCS.

§§ 254.66 through 254.6 9 [Reserved]

§ 254.70 What are the additional requirements for facilities conducting exploratory drilling

from a MODU on the Arctic OCS?

In addition to meeting the applicable requirements of this Part, your response plan must:

(a) Describe how the relevant personnel, equipment, materials, and support vessel s

associated with the capping stack, cap and flow system, containment dome, and other similar

subsea and surface devices and equipment and vessel s w ill be integrated into oil spill respons e

incident action planning;

(b) Describe how you will address human factors, such as cold stress and cold related

conditions, associated with oil spill response activities in adverse weather conditions and their

impacts on decision

- making and health and s afety; and

(c) Undergo plan

- holder review p rior to handling, storing, or transporting oil in connection

with seasonal e xploratory drilling activities, and all resulting modifications must be submitted to

the Regional Supervisor. If this review does not r esult in modifications, you must inform the

Regional Supervisor in writing that there are no changes. The requirements of this subsection

are in lieu of the requirements in § 254.30(a).

§§ 254.71 through 254.79 [Reserved]

§ 254.80 What additional informa tion must I include in the “Emergency

response action plan ” section for facilities conducting exploratory drilling from a

MODU on the Arctic OCS?

In addition to the requirements in § 254.23, you must include the following information in

the emergency resp onse action plan section of your response plan:56 (a) A description of your i ce i ntervention p ractice s and how they will improve the

effectiveness of the oil spill response options and strategies that are listed in your OSRP in the

presence of sea ice. Whe n developing the ice intervention practices for your oil spill response

plan, you must consider, at a minimum, the use of specialized tactics, modified response

equipment, ice management assist vessels, and technologies for the identification, tracking,

co ntainment and removal of oil in ice.

(b) O n areas of the Arctic OCS where a planned shore

- based response would not satisfy

§ 254.1(a):

(1) A list of all resources required to ensure an effective offshore

- based response capable of

operating in adverse wea ther conditions. This list must include a description of how you wi ll

ensure the shortest possible transit times, including but not limited to establishing an offshore

resource management capability ( e.g

. , sea

- based staging, maintenance, and berthing logi stics);

and

(2) A list and description of logistics resupply chains, including waste management, that

effectively factor in the remote and limited infrastructure that exists in the Arctic and ensure you

can adequately sustain all oil spill response activi ties for the duration of the response

. The

components of the logistics supply chain include , but are not limited to :

(i) personnel and equipment transport services;

(ii) airfields and types of aircraft that can be supported;

(iii) capabilities to mobilize supplies ( e.g., response equipment, fuel, food, fresh water) and

personnel to the response sites;

(iv) onshore staging areas , storage areas that may be used en route to staging areas, and

camp facilities to support response personnel conductin g offshore, nearshore and shoreline57 response; and

(v) management of recovered fluid and contaminated debris and response materials ( e.g.,

oiled sorbents), as well as waste streams generated at offshore and on

- shore support facilities

( e.g., sewage, food, and medical)

.

(c) A description of the system you will use to maintain real

- time location tracking for all

response resources while operating, transiting, or staging/maintaining such resources during a

spill response.

§§ 254.81 through 254.89 [Reserved]

§ 254.90 What are the additional requirements for exercises of your response personnel and

equipment for facilities conducting exploratory drilling from a MODU on the Arctic OCS?

In addition to the requirements in § 254.42, the following requirements app ly to exercises for

your response personnel and equipment for facilities conducting exploratory drilling from a

MODU on the Arctic OCS :

(a) Y ou must incorporate the personnel, materials, an d e quipment identified in § 254.70(a),

the safe working practices identified in § 254.70(b), the ice intervention practices described in

§ 254.80(a), the offshore

- based response requirements in § 254.80(b) , and the resource tracking

requirements in § 254.80(c) into your spill

- response tr aining and exercise activities.

(b ) For each season in which you plan to conduct exploratory drilling operations from a

MODU on the Arctic OCS , you must notify the Regional Supervisor 60 days prior to handling,

storing

, or transporting oil.

(c) After the Regional Supervisor receives noti ce pursuant to § 254.90(b)

, the Regional

Supervisor may direct you to deploy and operate your spill response equipment and/or your

capping stack, cap and flow system, and containment dome, and other similar subsea and surface58 devices and equipment and vess els

, as part of announced or unannounced exercises or

compliance inspections. For the purposes of this section, spill response equipment does not

include the use of blowout preventers, diverters, heavy weight mud to kill the well, relief wells,

or other s imilar conventional well control options

.

PART 550

— OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER

CONTINENTAL SHELF

16 . The authority citation for 30 CFR P art 550 continues to read as follows:

Authority: 30 U.S.C. 1751; 31 U.S.C. 9701; 43 U.S.C. 1334

17 . Revise § 550.105 by adding new definitions for “Arctic OCS” and “Arctic OCS

Conditions” in alphabetical order.

§ 550.105 Definitions

.

* * * * *

Arctic OCS means the Beaufort Sea and Chukchi Sea Planning Areas, as described in the

Proposed Final OCS Oil and Gas Leasing Program for 2012

- 2017 (June 2012).

Arctic OCS Conditions means , for the purposes of this Part, the conditions operators can

reasonably expect during operations on the Arctic OCS. Such conditions, depending on the time

of year

, include, but are not limited to: extreme cold, freezing spray, snow, extended periods of

low light, strong winds, dense fog, sea ice, strong currents, and dangerous sea states. Remote

location, relative lack of infrastructure, and the existence of subs istence hunting and fishing areas

are also characteristic of the Arctic region

.

* * * * *

18. Revise § 550.200 paragraph (a) by adding the term “IOP” in alphabetical order:

§ 550.200 Definitions.59 * * * * *

(a) * * *

IOP m eans Integrated Operations Plan

.

* * * * *

19. Add a new § 550.204 to read as follows:

§ 550.204 W h en must I submit my IOP for proposed Arctic exploratory

drilling operations and what must the IOP include?

If you propose exploratory drillin g activities on the Arctic OCS, you must submit an

Integrated Operations Plan (IOP) to the Regional Supervisor at least 90 days prior to filing your

EP. Your IOP must describe how your exploratory drilling program will be designed and

conducted in an inte grated manner suitable for Arctic OCS Conditions and include the following

information:

(a) Information describing how all vessels and equipment will be designed, bui lt, and /or

modified to account for Arctic OCS Conditions;

(b) A schedule of your explora tory drilling program, including contractor work on critical

components of your program ;

(c) A description of your mobilization and demobilization operations, including tow plans

suit able for Arctic OCS Conditions, as well as your general maintenance sche dule for vessels

and equipment ;

(d) A description of your exploratory drilling program objectives and timelines for each

objective, including general plans for abandonment of the well (s ), such as:

(1) contingency plans for temporary abandonment in the e vent of ice encroachment at the

drill site;60 (2) plans for permanent abandonment; and

(3) plans for temporary seasonal abandonment ;

(e) A description of your weather and ice forecasting capabilit ies for all phases of the

exploration program, including a description of how you would respond to and manage ice

hazards and weather events ;

(f) A description of work to be performed by contractors supporting your exploration drilling

program (including mobilization and demobilization) , including:

(1) How su ch work will be designed or modified to account for Arctic OCS Conditions; and

(2 ) Your concepts for contractor management, oversight, and risk management.

(g) A description of how you will ensure o perational safety while working in Arctic OCS

Condition s, including but not limited to:

(1) The safety principles that you intend to apply to you rself and your contractors;

(2 ) The accountability structure within your org anization for implementing such principles;

(3 ) How you will communicate such princi ples to your employees and contractors; and

(4 ) How you will determine su ccessful implementation of such principles.

(h) Information regarding your preparation s and plans for staging of oil spill response assets;

(i) A description of your efforts to mi nimize impacts of your explorat ory drilling operations

on local community infrastructure, including but not limited to housing, energy supplies, and

services; and

(j) A description of whether and to what extent your project will rely on local community

wo rkforce and spill cleanup response capacity.

20. Replace § 550.206 with the following:

§550.206 How do I submit the IOP, EP, DPP, or DOCD?61 (a) Number of copies. When you submit an IOP, EP, DPP, or DOCD to BOEM, you must

provide:

(1) Four copies that co ntain all required information (proprietary copies);

(2) Eight copies for public distribution (public information copies) that omit information

that you assert is exempt from disclosure under the Freedom of Information Act (FOIA) (5

U.S.C. 552) and the i mplementing regulations (43 CFR part 2); and

(3) Any additional copies that may be necessary to facilitate review of the IOP, EP, DPP, or

DOCD by certain affected States and other reviewing entities.

(b) Electronic submission. You may submit part or all of your IOP, EP, DPP, or DOCD and

its accompanying information electronically. If you prefer to submit your IOP, EP, DPP, or

DOCD electronically, ask the Regional Supervisor for further guidance.

(c) Withdrawal after submission. You may withdraw your p roposed IOP, EP, DPP, or

DOCD at any time for any reason. Notify the appropriate BOEM OCS Region if you do.

21. Amend § 550.220 by:

a. Revising paragraph (a) , and

b . Adding a new paragraph (c)

.

§ 550.220 If I propose activities i n the Alaska OCS Re gion, what planning

information must accompany the EP?

* * * * *

(a) Emergency Plans . A description of your emergency plans to respond to a fire, explosion,

personnel evacuation, or loss of well control, as well as a loss or disablement of a dri lling unit,

and loss of or damage to a support vessel , offshore vehicle, or aircraft.

* * * * *62 (c) If you propose exploration activities on the Arctic OCS, the following planning

information must also accompany your EP:

(1) Suitability for A rctic OCS Conditions . A description of how your exploratory drilling

activities will be designed and conducted in a manner suitable for Arctic OCS Conditions and

how such activities will be managed and overseen as an integrated endeavor.

(2) Ice and we ather management

. A description of your weather and ice forecasting and

management plans for all phases of your exploratory drilling activities , including :

( i ) A description of how you will respond to and manage ice hazards and weathe r e vents;

(ii) Y our ice and weather alert procedures;

(iii) Y our procedures and thresholds for activating your ice and weather

m anagement system(s); and

(iv) C onfirmation that you will operate ice and weather management an d a lert systems

continuously throughout t he planned operations, including mobilization and demobilization

operations to and from the Arctic OCS

.

(3) Source Control and Co ntainment Equipment Capabilities. A general description of how

you will comply with § 250.471 of this Title.

(4) Deployment of a relief well rig

. A gene ral description of how you will

comply with § 250.472 of this Title , including a description of the relief well rig, the anticipated

staging area of the relief well rig, an estimate of the time it would take for the relief wel l rig to

arrive at the site of a loss of well control, how you would drill a relief well if necessary, and the

approximate timeframe to comp lete relief well operations.

(5) Resource

- sharing

. A ny agreements you have with third parties for the sharing of assets

or the provision of mutual aid in the event of an oil spill or other emergency.63 (6) Anticipated end of seasonal operations dates. Your projected end of season dates, and the

information used to identify those dates, for :

(i) the completio n of on

- site operations

, which is contingent upon your capability in terms

of equipment and procedures to manage and mitigate risks associ ated with Arctic OCS

Conditions; and

(ii) the termination of drilling operations into zones capable of flowing liquid hydrocarbons

to the surface consistent with the relief rig planning requirements under § 250.472 of this Title

and with your estimated timeframe under paragraph ( c ) (4) of this section for complet ion of relief

well operations.64 

## Appendix B. Level of Effect Definitions

This section defines and explains the levels of effect used in the EA to evaluate potential environmental impacts of the PAA. Impacts are described in terms of frequency, duration, general scope, and/or size and intensity. Each level considers such factors as the nature of the impact, the spatial extent, recovery times, and the effects of mitigation. The following definitions and explanations are from the source document (USDOI, BOEM, Alaska OCS Region

, 2011

- b), which is incorporated by reference, except for the explanation of lower trophics, which is from the following source document : USDOI, BOEM, Alaska OCS Region

, 2011

- a. Aspects of the effects analyses are incorporated by reference from these documents.



### Air Q **uality**

Negligible

• Emission rates would be less than 100 tons per year for volatile organic compounds (VOCs) and all pollutants regulated under the NAAQS, and, if applicable, the Alaska AAQS.

Minor

• Emission rates would be equal to or greater than 100 tons per year for VO Cs and all pollutants regulated under the NAAQS, and, if applicable, the Alaska AAQS.

Moderate

• Project

- related emissions, such as from exploration drilling, cause pollutant concentrations of at least one pollutant to exceed one

- half of the Prevention of Significant Deterioration maximum allowable increases; or project

- related emissions cause pollutant concentrations of at least one pollutant to exceed one

- half of the NAAQS, and, if applicable, the Alaska AAQS; or

• Increases in emissions of nitrogen oxid es (NO x ) and VOCs would result in the formation of ozone to a level that would be expected to exceed one

- half the ozone NAAQS.

Major

• Impact to the shoreline would be above the significance levels defined in 40 CFR 51.165(b)(2) for any criteria pollutant ; or

• Increases in emissions of NO x and VOCs would result in the formation of ozone to a level that would be expected to equal or exceed the ozone NAAQS.



### Water Q **uality**

Negligible

• Temporary and localized impacts to water quality that do not cause an “u nreasonable degradation” under 40 CFR 125.122.65 Minor

• Long

- term and/or widespread impacts to water quality that do not cause an “unreasonable degradation” under 40 CFR 125.122

Moderate

• Impacts to water quality that exceed NPDES permit criteria or cau se a temporary or localized “unreasonable degradation” under 40 CFR 125.122.

Major

• Impacts to water quality that cause long

- term and widespread “unreasonable degradation” under 40 CFR 125.122.



### Coastal, B **enthic, an d Pelagic H**  **abitats**

Negligible

• No mea surable impacts. Population

- level effects are not detectable.

• Localized, short

- term disturbance or habitat effect experienced during one season that is not to accumulate across multiple seasons.

• No population

- level impacts to reproductive success or recruitment are anticipated.

• Mitigation measures are implemented fully and effectively or are not necessary.

Minor

• Population

- level effects are not detectable.

• Widespread annual or chronic disturbances or habitat effects are not anticipated to

accum ulate across one year, or localized effects that are anticipated to persist for more than

one year.

• Mitigation measures may be implemented on some, but not all, impacting activities, indicating that some adverse effects are avoidable.

• Unmitigatable or unavoidable adverse effects are short term and localized.

Moderate

• Disturbances could occur, but not on a scale resulting in population

- level effects.

• Widespread annual or chronic disturbances or habitat effects could persist for more than one

year an d up to a decade.

Major

• Disturbances occur that result in measurable population

- level effects.

• Widespread seasonal, chronic, or effects from subsequent seasons are cumulative and are likely to persist for more than one decade.

• Mitigation measures ar e implemented only for a small portion of similar impacting activities, but more widespread implementation for similar activities could be more effective in reducing the level of avoidable adverse effects.66 • Unmitigatable or unavoidable adverse effects are widespread and long lasting.



### Lower T **rophics**

All levels of effects are the same as for marin e benthic and pelagic habitats.



### Fish and EFH

Negligible

• Negligible for fish and EFH are the same as negligible for marine benthic and pelagic habitats.

Minor

• Population

- level effects are not detectable. Temporary, nonlethal adverse effects to some individuals.

• Widespread annual or chronic disturbances or habitat effects not anticipated to accumulate

across one year, or localized effects that are anticipate d to persist for more than one year.

• Low mortality levels may occur, measurable in terms of individuals or less than 1 percent of the local post

- breeding fish populations.

• Mitigation measures may be implemented on some, but not all, impacting activitie s, indicating that some adverse effects are avoidable.

• Unmitigatable or unavoidable adverse effects are short term and localized.

Moderate

• Mortalities or disturbances could occur, but not on a scale resulting in population

- level effects.

• Widespread annual or chronic disturbances or habitat effects could persist for more than one year and up to a decade.

• Some mortality could occur but remains limited to a number of individuals insufficient to produce population

- level effects.

• Widespread implementa tion of mitigation measures for similar activities may be effective in reducing the level of avoidable adverse effects.

Major

• Same as for marine benthic and pelagic habitats.



### Marine and Coastal B **irds**

Negligible

• Localized short

- term disturbance or hab itat effect experienced during one season that is not anticipated to accumulate across one year.

• No mortality is anticipated.

• Mitigation measures implemented fully and effectively or are not necessary.67 Minor

• Widespread annual or chronic disturbances or habitat effects not anticipated to accumulate across one year, or localized effects that are anticipated to persist for more than one year.

• Anticipated or potential mortality is estimated or measured in terms of individuals or less than 1 percent of the local post

- breeding population.

• Mitigation measures are implemented on some, but not all, impacting activities, indicating that some adverse effects are avoidable.

• Unmitigatable or unavoidable adverse effects are short term and localized.

Moderate

• Widespread annual or chronic disturbances or habitat effects anticipated to persist for more than one year, but less than a decade.

Major

• Widespread annual or chronic disturbance or habitat effect experienced during one season that would be anticipat ed to persist for a decade or longer.

• Anticipated or potential mortality is estimated or measured in terms of hundreds or thousands of individuals or less than 1 0 percent of the local post

- breeding population, which could result in a long

- term population

- level effect.

• Mitigation measures are implemented for limited activities, but more widespread implementation for similar activities would be effective in reducing the level of avoidable adverse effects.

• Unmitigatable or unavoidable adverse effects are widespread and long lasting.



### Marine M **ammals**

Negligible

• Localized, short

- term disturbance or habitat effect experienced during one season that is not anticipated to accumulate across multiple seasons. Temporary, nonlethal adverse effects to a few indi viduals are possible.

• May cause brief behavioral reactions such as temporary avoidances of or deflections around

an area.

• No mortality or population

- level effects are anticipated.

• May affect an endangered or threatened species or critical habitat un der the ESA.

• Mitigation measures are implemented fully and effectively or are not necessary.

• Unmitigatable or unavoidable adverse effects are difficult to measure or observe.

Minor

• Localized disturbance or habitat effects experienced during one seas on may accumulate across subsequent seasons, but not over one year.

• Temporary, nonlethal adverse effects to some individuals.

• May cause behavioral reactions such as avoidances of or deflections around a localized area.

• Mortality or population

- level effects are not anticipated.

• May adversely affect an endangered or threatened species or critical habitat under the ESA.68 • Mitigation measures are fully implemented or are not necessary.

• Unmitigatable or unavoidable adverse effects are short term and localized.

Moderate

• Widespread annual or chronic disturbances or habitat effects could persist for more than one year and up to a decade.

• Mortalities or disturbances could occur, but would be below the estimated Potential Biological Removal. Populati on

- level effects are not anticipated.

• Likely to adversely affect an endangered or threatened species or modify critical habitat under the ESA.

• Widespread implementation of mitigation measures for similar activities may be effective in reducing the lev el of avoidable adverse effects.

• Unmitigatable or unavoidable adverse effects are short term and widespread or long term and localized.

Major

• Widespread seasonal or chronic effects from subsequent seasons are cumulative and are likely to persist for m ore than one decade.

• Mortalities or disturbances could occur at or above the estimated Potential Biological Removal, which could be a population

- level effect.

• May adversely affect an endangered or threatened species or critical habitat under the ESA, b ut would not necessarily jeopardize the continued existence of an ESA

- listed species.

• Mitigation measures are implemented only for a small portion of similar impacting activities, but more widespread implementation for similar activities could be more ef fective in reducing the level of avoidable adverse effects.

• Unmitigatable or unavoidable adverse effects are widespread and long lasting.



### Sociocultural Systems

Negligible

• Periodic disruption of social organization, cultural values, and/or institution al arrangements occurs without displacement of existing social patterns.

Minor

• Disruption of social organization, cultural values, and/or institutional arrangement occurs for a period of less than one year, without a tendency toward displacement of exis ting social patterns.

Moderate

• Chronic disruption of social organization, cultural values, and/or institutional arrangements occurs for a period of more than one year, without a tendency toward displacement of existing social patterns.69 Major

• Disrupti on of social organization, cultural values, and/or institutional arrangements with a tendency toward displacement of existing social patterns.



### Subsistence

Negligible

• Subsistence resources could be periodically affected with no apparent effect on subsis tence harvests.

Minor

• Adverse impacts to subsistence activities are of an accidental and/or incidental nature and limited to a short term.

Moderate

• Adverse impacts which disrupt subsistence activities, or make subsistence resources unavailable, undesi rable for use, or only available in greatly reduced numbers, for a substantial portion of a subsistence season for any community.

Major

• Adverse impacts resulting in one or more important subsistence resources becoming unavailable, undesirable for use, or available only in greatly reduced numbers for any community.The Department of the Interior Mission As the Nation's principal conservation agency, the Department of the Interior has responsibility for most of our nationally owned public lands and natural resources. This includes fostering sound use of our land and water resources; protecting our fish, wildlife, and biological diversity; preserving the environmental and cultural values of our national parks and historical places; an d providing for the enjoyment of life through outdoor recreation. The Department assesses our energy and mineral resources and works to ensure that their development is in the best interests of all our people by encouraging stewardship and citizen particip ation in their care. The Department also has a major responsibility for American Indian reservation communities and for people who live in island territories under U

. S

. administration.

The Bureau of Ocean Energy Managemen t Mission As a bureau of the De partment of the Interior, the Bureau of Ocean Energy Management’s (BOEM) primary responsibilities are to manage the mineral resources located on the Nation's Outer Continental Shelf (OCS) in an environmentally sound and safe manner.

The Bureau of Safe ty and Environmental Enforcement BSEE works to promote safety, protect the environment, and conserve resources offshore through vigorous regulatory oversight and enforcement

.