October 15, 2018

Addendum No. 1

RFP 11243 – FPP Bulk Turbine Oil (Shell Only)

This serves as Addendum No. 1 and becomes part of the original Request for Proposals

package. It must be signed and returned with your RFP response. The Submittal deadline will be

extended to Thursday October 18th, 2018 by 12:00pm.

Below is an additional question that may be used as an alternative to replacing all of the oil at

one time. Please provide an answer to the following question. See additional (7) pages for

current oil sample information and analysis report.

1. What is the quantity of oil that needs to be added to sweeten the exiting oil so that it

will reliably lubricate the turbine-generator for 3 years? Note that an equal amount of

oil will be removed as added to sweeten the total oil reserve. Assume the turbine-

generator is operated within General Electrical specifications.

Acknowledgement of Receipt of Addendum #1

Company Name/Contact Name Email

Phone Number Signature

4^™Tme ORflio RIES

305 NebraskaSouth Houston, TX 77587713-944-8381

Customer Information

LCRAPO Box 519

La Grange T>Attn: Darrell Moerbe

Sample Condition Evaluation

EQUIPMENT FLUID

NORMAL MONITOR

Sample Information

Sample No. Sample Date Hrs/Miles18090463 2018-09-1018082043 2018-08-23

18071906 2018-07-23

18061750 2018-06-26

18051814 2018-05-1718041547 2018-04-24

Watch Advisory

Warning Advisory

Reference (10200010764 - 2015-06-22)

Sample Information

Sample No. Sample Date Hrs/Miles

18090463 2018-09-10

18082043 2018-08-2318071906 2018-07-23

18061750 2018-06-26

18051814 2018-05-1718041547 2018-04-24

Watch Advisory

Warning Advisory

Reference (10200010764 - 2015-06-22)

CONTAMINATION

MONITOR

Iron Cop0 00 0

0 0

0 00 0

0 010 10

20 20

0 0

v40ccSt

32.3

34.033.2

34.5

33.2

32.4

28.8-35.2

27.2-36.8

31.9

1020001

; 78945

OVERALL

ABNORMAL

Tin00

0

00

110

20

0

Acid #

mgKOH/g0.09

0.07

0.07

0.07

0.05

0.070.2

0.3

0.07

SAMPLE INFORMATION Point IDSite Fayette Power Project

Area Unit 2 Unit

Equipment Steam TurbinesDescription Unit 2 Main Turb Lube Oil

Fluid Shell Turbo T 32 Turbine Oil

Gallons In Use Oust.

Lab Comments for Most Recent Sample

0049

2CB Unit 2Turbine

Rsvr

00190603

Main &BFP

EQUIPMENT INFORMATIONCooling Source

Filter Size

Last Filter ChangeLast Fluid Change

Bearing Types

Gear Types

Steam Turbine

Overall assessment of ABNORMAL, mostly to place emphasis on the RPVOT and Ruler results that both show depletedamine antioxidants =

correlated to indicated that this oil is approaching the end of its useful life.

remaining) anti-Both results

MPC Delta E = 21.3. MONITOR. With a lowered RPVOT and Ruler results, there is a high probability that the MPC Delta E will begin torise in the near to medium term since the oil is low on antioxidant protection.

Consider replacing the oil at the scheduled turnaround.

Wear Metals, ppm

Lead00

0

00

010

20

0

H20

ppm

32

36

21

6434

49100

200

33

Chrm00

0

00

05

10

0

Nick Alum Titan Silv0000

0000

0000

00000000

00005 10 5 5

10 20 10 10

0000

Cal

002

00

0

0

Mag00

0

00

0

0

Additive Metals, ppm

Znc002000

0

Phos0

00

00

0

0

Physical and Other Tests

RPVOT MPC Amine Phenol Part Count

mm

213

250175

AE % % ISO_4406

21.3 20 8 20/17/1220/14/11

16/11/0816/12/0818/13/09

16/13/1015 - - 20/18/16

35 - - 21/19/17

20/16/11

> 4|J

52048450

601

3262014

466

8848.0

> 6p > Up

Bari Molyb Antm000

000000

000000000

000

Silic000

00

010

20

0

>21|J > 38^1particles per milliliter

79813920

245973

630.2

26

202

2

5

7

10.6

8 1

9 2

1 0

1 0

2 0

2 0

3.4 0.7

Contaminant Metals, ppm

Sodi0

00

00

040

40

1

Boron0

0

0

00

010

20

0

Pot000

00

0

1530

0

Vana00

0

00

0

Sample No.

18051814

18041547

Sample Date

2018-05-17

2018-04-24

Laboratory Comments

No significant abnormalities noted. Fluid is in good condition for continued use. Negligible levels of wear and contaminant metals detected. No indication of oxidation or significant water contamination.Sample again at the next regular interval.

No significant abnormalities noted. Fluid is in good condition for continued use. Negligible levels of wear and contaminant metals detected. No indication of oxidation or significant water contamination.Sample again at the next regular interval.

\f^^̂ MRTLBB DRHIOniES

Additional images for Sample: 18090463

Equipment ID

Tur6oT32 Turbine Oil

Amines RUL = 20%; Phenols RUL = 8%

l1^

Time (Seconds)

Standard; Shell Turbo T 32 Turbine Oil

k. ^MPC Delta E= 21.3

sQ^̂ MBTLfl eORDTORI ES

305 NebraskaSouth Houston, TX 77587

713-944-8381

Site : Fayette Power Project

Customer Information

LCRA-1020001

PO Box 519

La Grange, TX 78945 Attn: Darrell Moerbe

Sample # Area

18090463 Unit 2

Unit Overall Alarms

1809D464 Unit 2

RPVOT= 213.0

MPC=21.3

Part Count =20/17/12

2CB Unit 2 Main Steam&BFP Turbine Turbines

2CB Unit 2 Main Steam& BFP Turbine Turbines

Comments

Overall assessment of ABNORMAL, mostly to placeemphasis on the RPVOT and Ruler results that bothshow depleted remaining anti-oxidant protection.RPVOT = 213, which is 21.3% of new oil RPVOT.Remaining amine antioxidants = 20% of new oil. Bothresults correlated to indicated that this oil isapproaching the end of its useful life.

MPC Delta E = 21.3. MONITOR. With a loweredRPVOT and Ruler results, there is a high probabilitythat the MPC Delta E will begin to rise in the near tomedium term since the oil is low on antioxidantprotection.

Consider replacing the oil at the scheduled turnaround.

Fluid is in good condition for continued use. Negligiblelevels of wear and contaminant metals detected. Noindication of oxidation or significant watercontamination.

MONITOR. The Ruler test measured 29% of amineantioxidants remaining and rule of thumb low level is20% to 25%. 29% active remaining amines isacceptable for the near to medium term, but if there's aturnaround scheduled in less than six months, afterwhich the oil will need to be in service for several years,then we recommend considering oil replacement.Continue use of oil, but we recommend another Rulerand MPC test in six months.

Comments: The ability of this turbine oil to resist oxidation is severely reduced. Significant color bodies and residue present are, consistent with ongoing varnish formation. The reduced RPVOT results and antioxidant contents are further evidence the above statements.

Southwest Spectro-Chem Labs1009 Louisiana St. South Houston, TX 77587(P)713.944.3694 (F)713.944.9881www.weanalyzeoil.com

ANALYSIS REPORT

SAMPLE INFORMATIONCUSTOMER#: 174700 EQUIP NO: 0001CUSTOMER: LCRA FAYETTE POWER PROJ. LAB SAMPLE: J0627LOCATION: FAYETTE POWER PROJ. OIL USED: SHELL TURBO 32

UNIT: UNIT 2 TIME ON OIL: N/ADESCRIPTION: MAIN TURBINE L/O RESERVOIR SAMPLE DATE: 10/10/18

SERIAL: REPORT DATE: 10/13/18

OXIDATION STABILITY by RPVOT, ASTM D2272

Sample Result: 265 minunused Shell Turbo T 32: >950 min

RULER Linear Sweep Voltammetry, ASTM D6971

Phenolic Content: 16.1%Amine Content: 31.3%

Membrane Patch Colorimetry, ASTM D7843

MPC: 32

VARNISH FORMATION TENDENCY, SWSC Labs Procedure

VFT: 42 (Watch)

Approved:Peter Lau, laboratory manager

Southwest Spectro-Chem Labs and its affiliates make no warranty for proper operation of any equipment associated with this report.

WATCH The patch weight and color (MPC = 32) are significant; excessive organic particles and color bodies are present. The antioxidant consists of phenolics (16.1%) and amines (31.3%); the RULER indicates both are diminished relative to the Shell Turbo T 32 standard used for comparison . Physical properties indicated excessive particles (particle count 20/17/11). The majority of these particle s are likely soft particles, as the metals content is low and appropriate . The overall VFT calculation of 42 is in the WATCH category, though the actual condition may be more severe. Judging from the patch deposit weight and reduced antioxidant content, signific ant deposits and varnishing likely already exist. RECOMMENDATION Continue checking filters and strainers for any bro wn film deposit, sight glasses for brown residue, reservoirs for “bath -tub” rings, and oil color getting darker to detect any indication of possible varnish formation. Monitor the oil condition on a regular monthly schedule with routine oil analysis. Anti oxidant content should be monitored with a RULER (Linear Sweep Voltammetry) test regularly.

Southwest Spectro-Chem Labs Varnish Potential1009 Louisiana St. South Houston, TX 77587 WATCH (P)713.944.3694 (F)713.944.9881 VFT= 42 www.weanalyzeoil.com

Varnish Analysis ReportSAMPLE INFORMATION

CUSTOMER #: 174700 LAB SAMPLE #: J0627CUSTOMER: LCRA FAYETTE POWER PROJ. OIL USED: SHELL TURBO 32LOCATION: FAYETTE POWER PROJ. TIME ON OIL: N/A

UNIT: UNIT 2 SAMPLE DATE: 10/10/18DESCRIPTION: MAIN TURBINE L/O RESERVOIR REPORT DATE: 10/13/18

EQUIP NO: 0001 ANALYST: P Lau

PATCH

RULER

Comments:

Southwest Spectro-Chem Labs and affiliates, officers assume no responsibility and make no warranty for proper operation of any equipment associated withmaterial(s) sent by clients in connection with this report.

J0627OIL MONITORING RESULTS EMISSION SPECTROSCOPY DATARotrode - Iron, ppm 0 BORON 0 SILICON 0Rotrode - Copper, ppm 0 LEAD 0 SODIUM 0FDRL 10.7 IRON 0 BARIUM 0*FTIR - OXIDATION 0 ALUMINUM 0 CALCIUM 0*FTIR - NITRATION 0 COPPER 0 ZINC 0TAN 0.08 CHROMIUM 0 PHOSPHOROUS 0KF Water, ppm 37 TIN 0 MAGNESIUM 0Particle Count 20/17/11 ANTIMONY 0Viscosity @ 40°C, cSt 32.6 SILVER 0Viscosity Change,% 1.9 TITANIUM 0

VANADIUM 0VARNISH DATA RESULTS POTASSIUM 0

Membrane Patch Colorimetry 32 MOLYBDENUM 0Linear Sweep Voltammetry (RULER) Phenolic % 16.1 NICKEL 0Linear Sweep Voltammetry (RULER) Amine % 31.3

**Deposit Residue as Varnish Thickness Category Range, %A precursor/varnish residue of 231ppm calculates to NORMAL 0 - 2415 -microns maximum thickness. This represents an WATCH 25 - 49upper limit of 75% of a typical 20-micron frictionless ALERT 50 - 74bearing clearance. CRITICAL 75 - 100

* SWSCLabs normalized 0 - 4 Scale ** Close tolerances may plug with varnish.

What is Varnish in Lubricants?

Varnish is an oil-insoluble deposit composed primarliy of organic residues and commonly defined by analyzed color intensity. Analytical data arecombined to generate a single number representing Varnish Formation Tendendy (VFT) of the oil, on a scale of 0-100.

Lubricants are examined to detemine the condition of the oil, machinery and particulates using a variety of tests:FTIR Measurement of Oxidation and Nitration of lubricant.Particle Count A measurement of oil cleanliness.Metals A report of machine wear, oil additive and contaminant metals in the lubricant.Viscosity An oil's resistance to flowWater (Karl Fischer) How much water is in the lubricant.

None of the above tests are used or considered effective in determining the VFT. These test data are provided to show the current condition of the oil,machine and particulates in the oil.

VFT can be determined using the following tests:Membrane Patch Colorimetry See the examples below.RULER Measures the remaining Amine and Phenolic antioxidants in the oil, compared to a new oil reference.Amine Primary antioxidant protecting the oil from thermal and chemical oxidation and remains constant

until all Phenolic consumed. (Acts synergistically with phenolics but can be used alone.)Phenolic Secondary antioxidant, regenerates amine until consumed; however, can be the only antioxidant

in some oils.Varnish Thickness Calculation An upper limit estimate of the VARNISH deposit thickness in the Machine.

Increasing Varnish deposit in a machine (from left to right)

White NORMAL WATCH ALERT CRITICALReference Example Example Example Example

The actual color (yellow, orange, green, brown to black) is not significant, only the color intensity. The darker the color, the more serious the varnish problem.

Values of VFT provide a trend to project future VARNISH formation.

Southwest Spectro-Chem Labs and affiliates, officers assume no responsibility and make no warranty for proper operation of any equipment associated withmaterial(s) sent by clients in connection with this report.