D E P E N D A B L E N A T U R A L G A S

www.elpaso.com | NYSE:EP

Customer WebexOctober 5, 2011

Review of Upcoming OutagesOctober & Winter 2011

Gulf CoastCentralNorthern

Q&A

Anticipated Impacts are estimates. Actual nominations, market demand, weather and pipeline conditions, etc. will determine if, and through what level, restrictions become necessary.Unless otherwise stated, all scheduled dates represent gas days as defined in the Tennessee Gas Pipeline tariff to mean a period of twenty-four consecutive hours, beginning and ending at 9:00 a.m. (Central Clock Time).

Scheduled dates are subject to change.Projects may be added, altered, delayed or cancelled. TGP will provide notice of such additions or changes via PASSKEY postings.Dates as posted on PASSKEY should be deemed correct in the event of conflicts between PASSKEY posted dates and dates within this presentation.

GreenNo Impact Anticipated

YellowRestrictions are possible, but not likely.With extended duration, restrictions could be necessary from time to time.

RedRestrictions are probable, ORMeter(s) affected, ORCombination of the above.

Branch line inspection (M)MLV 33-1 to 34-1 10/18 to 10/20MLV 26-1 to 27-1 10/11 to 10/13

MLV 19-1 to 20-1 10/3 to 10/8MLV 14-1 to 15-1 10/24 to 11/2

Station 703Repair seal 10/4 to 10/6

Station 40 Unit 500 C1Unit inspection 10/10 to 10/13

MLV 834-1 to 835-1 Cleaning/Caliper/ILI pigging

10/10 to 10/13

523M-7300 and 523M-7600Line abandonment (M)

10/4 to 10/15

Anomaly remediation MLV 41-1 to 42-1 (M) 10/3 to 10/12

MLV 45-1 to 47-1 10/7 to 10/14

MLV 43A-100 to 43-101A Maintenance pigging (M) 10/12

Station 827Peco filter change

10/12 to 10/14

Vermilion 245Vent stack/filter

separator installation10/1 to 10/15

MLV 20 to 21 (all three lines) Line lowering 9/10 to 10/17

Station 409Unit 1A Maintenance 10/17

Maintenance PiggingSt 823 to St 40 10/20St 823 to St 827 10/20

Bluewater—SystemPigging operations

10/18 to 10/23

MLV 16-3 to 17-3Relocate pig receiver

10/6 to 10/24

Bear Creek StorageFall shut in test. 10/18 to 10/24

Station 1ESD Test 10/27

MLV 9-1 to 11-1Maintenance pigging 10/27

Hydrostatic testMLV 25-2 to 27-2 10/4 to 10/31MLV 32-3 to 34-3 10/4 to 10/31

MLV 21-3A to 22-3Line lowering (M) 8/18 to 11/1

MLV 7-2 to 9-2Emergent anomaly

7/19 to 12/31

Maintenance pigging409A-1100 (Rio Bravo) 11/1

409A-100 (Pemex) 10/27

Anomaly remediationMLV 541-1 to 542-1 (M) 9/20 to 10/5

MLV 540-2 to 541-2 (M) 10/26 to 10/29MLV 539-2 to 540-2 (M) 10/5 to 10/12

Station 96MCC replacement 10/3 to 10/14

Anomaly remediation MLV 550-1 to 552-1 10/24 to 11/18MLV 540-1 to 541-1 10/12 to 10/26MLV 539-1 to 540-1 9/19 to 10/7

MLV 114-2 to 110-2ILI pigging10/13

MLV 115-2 to 116-2Anomaly remediation 10/3 to 10/14

Anomaly remediationMLV 83-1 to 85-1 10/5 to 10/20MLV 80-1 to 82-1 10/17 to 11/8 MLV 562-2 to 565-2

Emergent anomaly7/27 to 10/21

Station 87 E Bldg outage10/17 to 10/21

MLV 847-1 to 851-1 Cleaning/Caliper/ILI pigging

10/17 to 10/27

Station 843Yard welding

10/26 to 10/27

Station 200MCC replacement 10/17 to 10/31

MLV 100-4 to 101-4Pipe replacement 10/22 to 11/4

MLV 200-4B to 204-4Valve replacements 10/24 to 12/2

MLV 40-2 to 47-2 Pipeline Outage4/14 to 11/1 (est)

Anomaly remediationMLV 313A-403 to -404 9/20 to 10/8MLV 313A-406 to -407 10/3 to 10/5MLV 313A-410 to -410 10/3 to 10/5

300 Line Tie-insMLV 314A-101 to 315-2 10/17 to 10/20MLV 317-AD2 to 317A-101 9/26 to 10/5

MLV 320-2L to 320-2 10/17 to 10/20MLV 321-2 to 321-101 10/6 to 10/12

MLV 325-2 to 325D-101 10/16 to 10/20

Emergent anomalyMLV 213-1 to 214-1 9/12 to 10/7MLV 208-1 to 209-1 8/24 to 10/5

Station 319ESD test (1 day)

9/28 to 10/7

Station 265EReplace BPS system

10/3 to 10/7

Fall shut in testHarrison Storage 10/3 to 10/7

Hebron/Ellisburg 10/24 to 10/28

MLV 237-1 to 245-1Efficiency pigging 10/11

MLV 356-1 to 336-1 Cleaning Pig 10/11

Station 245Unit maintenance

10/3 to 10/13

Station 229Unit maintenance

10/11 to 10/13

MLV 270B-101.1 to -105 ILI pigging 10/11 to 10/13

Meter 020200 (Union City) Meter modifications (M)

10/12 to 10/13

MLV 270B-105 to -106ILI pigging 10/110to 10/14

Station 241B Unit maintenance 10/10 to 10/15Unit 3A maintenance 10/16 to 10/28

Meter 020914 (Sabinsville) Meter upgrade (M)

10/1 to 10/16Station 313

Unit maintenance9/6 to 10/20

Station 270BESD Test 10/25 to 10/26

Anomaly remediationsMLV 318-1 to 319-1 MLV 320-1 to 321-1MLV 322-1 to 323-1

10/18 to 10/28

MLV 334-1 to 336-1 Pipe relocation (M)

10/24 to 10/31

MLV 213-3 to 214-3Hydrostatic test 10/24 to 11/4

MLV 267-1 and Concord LateralEmergent anomaly 9/13-11/1

Pipeline OutageMLV 214-4 to 216-4 3/1 to 11/1 (est)MLV 209-1 to 210-1 3/1 to 11/1 (est)

Efficiency piggingMLV 32-1 to 40-1 (M) 11/8MLV 32-3 to 40-3 (M) 11/9

MLV 17-1 to 9-1Maintenance pigging 11/16

Branch line inspection (M)MLV 14-1 to 15-1 10/24 to 11/2MLV 15-1 to 16-1 11/8 to 11/10

MLV 3-1 to 4-1 11/14 to 12/3

CarthageSt 40 Pipe replacement 11/1 to 11/3

Station 703 Unit maintenance 11/1 to 11/3

Station 527MCC replacement 11/7

MLV 526-1 to 527-1 Maintenance Pigging

11/7 to 11/12

MLV 533-1 to 534-1Anomaly remediation (M)

11/11 to 11/14

Line 21B-100 (Tomball Line) Hydrostatic test (M) 12/1 to 12/20

MLV 550-1 to 552-1Anomaly remediation

10/24 to 11/18

Anomaly remediationMLV 557-1 to 559-1 11/28 to 12/2MLV 555-1 to 557-1 11/4 to 11/18MLV 550-2 to 554-2 11/28 to 12/5MLV 541-2 to 542-2 11/15 to 11/18

MLV 40-2 to 47-2 Pipeline Outage4/14 to 11/1 (est)

MLV 80-1 to 82-1Anomaly remediation

10/17 to 11/8

MLV 100-4 to 101-4Pipe replacement 10/22 to 11/4

MLV 200-4B to 204-4Valve replacements 10/24 to 12/2

MLV 260A-100 (Northampton) Cleaning Pig 11/8 to 11/9

Station 319Emissions Testing

11/28 to 12/2

Line 217A (Pittsburg Spur) Cleaning and ILI pigging 12/1

Station 315Crane Install11/8/ to11/10

Pipeline OutageMLV 214-4 to 216-4 3/1 to 11/1 (est)MLV 209-1 to 210-1 3/1 to 11/1 (est)

MLV 267-1 and Concord LateralEmergent anomaly 9/13-11/1

12

MLV 314

Meters in the MLV 318-1 to 319-1 valve section:012823 ELLIOTT DEHY: RIP 318 101.1 012769 EVANCHICK DEHY: RIP 318C 101.1 020652 WYALUSING SALES

Station315

Station317

Station325

Station313 MLV 316 MLV 318 MLV 320 MLV 324MLV 322

Meters in the MLV 320-1 to 321-1 valve section:012751 HOP BOTTOM DEHYD: RIP 320C 101.1 012841 AUBURN DEHYDRATION: RIP 320-1 0.04 012782 LOTT DEHYDRATION: RIP 320D 101.1A 012778 TEEL DEHYDRATION: RIP 320H 101.1A 012825 STRICKLAND HILL DEHY: RIP 320K 101.1 012793 SPRINGVILLE DEHY: RIP 320I 101.1 012821 DIMOCK DEHY: RIP 320J 101.1 012794 KORBAN DEHY:RIP 320E 101.1

Meters in the MLV 322-1 to 323-1 valve section:020277 HONESDALE PENNSYLVANIA SALES

Station319

Station321

Station323

Reduced operating pressures by 20%

MLV 318-1 to 319-1, 320-1 to 321-1, and 322-1 to 323-1

Anomaly remediations (M) 10/18 to 10/28

Station315

Station323

Station325

Station313

13

Station40

MLV 707

MLV 706

MLV 705

MLV 704

MLV 703

MLV 702

MLV 701

MLV 700

0126

88 P

ANOL

A TR

ANSP

ORT

2

0120

33 C

ARTH

AGE

TRAN

SPOR

T

0121

41 C

ARTH

AGE

GAS U

NIT

13 (B

i 2 0

723

0207

23 C

ARTH

AGE

GAS

UNIT

13

(Bi 1

214

1)

0100

31 E

AST

TEXA

S PLA

NT D

EHYD

RATI

ON

0112

00 E

NTEX

PAN

OLA

TRAN

SPOR

T (C

I)

0115

25 B

ELLE

BOW

ER D

EHYD

RATI

ON

0127

64 S

TATE

LINE

PRO

CESS

ING:

RIP

704

F

0128

07 LO

GANS

PORT

B: R

IP 7

04H

101.

1A

0127

59 B

URFO

RD G

ATHE

RING

: RIP

704

E 1

01.1

0120

81 B

ETHA

NY LO

NGST

REET

FIE

LD

0120

26 G

RAND

CAN

E

0127

06 LO

GANS

PORT

0113

27 S

PIDE

R DE

HYDR

ATIO

N

0127

25 D

E SO

TO G

ATHE

RING

0126

07 D

ESOT

O HO

LLY

FIEL

D01

2583

BEN

SON

AND

CONV

ERSE

0128

14 B

LACK

STON

E NO

1: R

IP 7

03K

101.

1

0114

42 N

ABOR

TON

DEHY

D D

N BE

LL 1

(CI)

0127

75 T

RENT

ON S

ALES

: RIP

703

H 1

5.38

0127

65 H

ARRI

S 19

.1: R

IP 7

03G

101.

1

0127

36 M

ARTI

N TI

MBE

R (C

O)

0126

10 W

EST

MAN

SFIE

LD02

0628

PLE

ASAN

T HI

LL T

RANS

PORT

(CI)

0127

86 B

LACK

STON

E IV

ORY:

RIP

702

M 1

01.1

0116

68 B

RUSH

Y BA

YOU

FIEL

D

0117

55 G

ROGA

N FI

ELD

(CI)

0113

30 C

HEM

ARD

LAKE

DEH

YDRA

TION

0115

90 G

ROGA

N FI

ELD

(CI)

0115

98 SA

N M

IGUE

L CRE

EK FI

ELD

(CI)

0111

43 G

ROGA

N DE

HYDR

ATIO

N

TRAN

SPOR

T (C

I)

Pipe replacement in Station 40 yard.11/1-11/3

Impact: Carthage Lateral shut in at Station 40.-Physical flow into the Carthage Lateral must match physical flow out of the Carthage Lateral.-All receipt meters between MLV 707 (end of lateral) and MLV 700—at Station 40 would have to shut in or schedule flow to Enterprise meter 020723.

Station703

Questions?

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