ExxonMobil ProprietaryFigure 4.0-1 SYU OPSRB

ExxonMobil ProprietarySYU OPSRB

SYU Existing Offshore Facilities Overview

Figure 4.0-2

ExxonMobil ProprietarySYU OPSRB

SYU LFC Onshore Facilities Overview

PACIFIC OCEAN

U.S. 101AND

RAILROAD

CABLE SPLICE EXCAVATION

Tunnel Access in El Capitan State Beach (Bike Path)

Tunnel Access in LFC

FIBER OPTIC CABLE(Existing Conduit to POPCO)

(OSS)

TUNNEL

Figure 4.0-3

LFC Side of Tunnel

SYU OPSRB4

TRANSITION SPLICE AREA

LFC SIDE TUNNEL ACCESS AREA

TUNNEL

Figure 4.0-4

Cross-Section of Tunnel

SYU OPSRB

Oil Emulsion

Water Gas

SUBMARINECABLE C1,B,A

Figure 4.0-5

Diagram of Elevation of Tunnel and Conduit Area

SYU OPSRB

Nearshore Area LFC Area

Figure 4.0-6

SYU Nearshore Power Cable Conduit Location

SYU OPSRB

CONDUIT TERMINUS AREA

Figure 4.0-7

ExxonMobil Proprietary

SYU Existing Power Distribution System

State Jurisdiction

Outer Continental Shelf (Federal Jurisdiction)

Harmony

Heritage ~19 MW

Harmony ~17 MW

Hondo ~8 MW

Total ~44 MW

LFC / POPCO

E

D1

B

A

C

C1

D

SYU Offshore Power Distribution System- Original cables are shown in black (early 1990s)- OPSR-A cables are shown in blue (2003)- Dotted line represents cables taken out of service

Approximate Power Consumption

Hondo

Up to 50 MW generation at LFC

Location of fault repairs on C1 cable

SYU OPSRB

Harmony

Heritage

Figure 4.0-8

ExxonMobil Proprietary

OPSRB Proposed ScopeDescription• Replace 2 existing submarine power cables: Replace

A (or B) with A2 (or B2) and replace C1 with F2 and G2 [Phase-2]− 29 miles of 3 phase cables; 35 kV ; 32 MW − Total cable weight approx. 2900 tons

Excavating / trenching for splicing Remove cable in tunnel & conduits

Retrieve cables and install replacement cables and P/L crossings within State Lands ROW

Remove cable fromHA & HE J- Tubes

• Retrieve and recycle 12-18 miles of Cables A (or B) and C1 (LFC to State/Federal Boundary, on and adjacent to HA and HE, and along route) [Phase-2]

• Install modifications on HA and HE for cable installation and electrical equipment [Phase-1]

Install risers and cable in centenary

Pre-Project Surveys including near shore marine biological and route archeological

Install replacement cables and cable crossings in OCS

Install new GISbuilding

SYU OPSRBFigure 4.0-9

ExxonMobil Proprietary

SYU Cable Cross-Sections

35 kV Pirelli Cable Installed in 2003

• Kerite (1993)- Original submarine power cable installations• Pirelli (2003)- Cable C1 and D1 (Similar design except water blocking and fiber optics)• OPSRB (2015)- Similar to Pirelli with double armor wire, 46 kV insulation, and larger conductors

Fiber Optic Cable

Power Conductors

SYU OPSRB

Water Blocking

Armor Servings

Single Armor

35 kV Kerite Cable Installed in 1993

Figure 4.0-10

ExxonMobil Proprietary

Red Cables A2 (or B2), F2 & G2 will be installed replacement cables. Blue Cables B (or A), D, D1, & E are existing cables that will remain in operation. Black Dashed Cables A (or B), C1 & C will be abandoned in place. Cables A (or B) & C1 will be retrieved in Tunnel, Conduits, State Waters and adjacent to Platforms.

OPSRB Cable Overview Diagram

Figure 4.0-11

Typical DP Cable Installation Vessel

SYU OPSRB

Typical Typical DP Cable Installation Vessel - Preliminary Deck Layout

Figure 4.0-12

Cable Retrieval from Conduit and Tunnel

SYU OPSRB

IDENTIFY, CUT AND RETRIEVE CABLE(CONDUIT & TUNNEL)

Figure 4.0-13

Cable Installation Start Pull-In at Platform

SYU OPSRB

Winch (Locate asAppropriate)

PLATFORMHERITAGE DP Cable Installation Vessel ( Typical)

Existing J-Tube

Cable C1

Figure 4.0-14

Cable Installation Platform to Platform or Platform to Shore

SYU OPSRB

DP Cable Installation Vessel ( Typical)

ROV Monitoring Touch Down as Appropriate

Figure 4.0-15

Cable Installation Final Pull-In (Platform to Platform)

SYU OPSRB

DP Cable Installation Vessel ( Typical)

Winch (Locateas Appropriate)

Cable D1

Figure 4.0-16

Cable Installation Final Shore Pull-In (Platform to Shore)

SYU OPSRB

DP Cable Installation Vessel ( Typical)DIVE SUPPORT VESSEL

Figure 4.0-17