ML20039C186

Supplemental Response to Joint Intervenors Second Set of Interrogatories.Certificate of Svc Encl

ML20039C186
Person / Time
Site:	Diablo Canyon
Issue date:	12/23/1981
From:	Crans P PACIFIC GAS & ELECTRIC CO.
To:	JOINT INTERVENORS - DIABLO CANYON
References
NUDOCS 8112290008
Download: ML20039C186 (15)

Text

. .

UNITED STATES OF AMERICA gy,UED NUCLEAR REGULATORY COMMISSION UT.RC

, BEFORE THE ATOMIC SAFETY AND LICENSING BOARD 1 28 b

,r In the Matter of ) _

)

PACIFIC GAS AND ELECTRIC COMPANY ) Docket No. 50-275

) Docket No. 50-323 Diablo Canyon Nuclear Power Plant, )

Units 1 and 2 ) (Full Power Proceeding)

)

APPLICANT PACIFIC GAS AND ELECTRIC COMPANY'S

• SUPPLEMENTAL RESPONSE TO JOINT INTERVENORS' #

SECOND SET OF INTERROGATORIES ascsW58 ,

42 (d) - See attached specification en otes s198 W' f Interrogatory 61 - See attached answer. 9

/

Respectfully submitted, 8N MALCOLM H. FURBUSH PHILIP A. CRANE, JR.

RICHARD F. LOCKE Pacific Gas and Electric Company P. O. Box 7442 San Francisco, California 94120 (415) 781-4211 ARTHUR C. GEHR Snell & Wilmer 3100 Valley Bank Center Phoenix, Arizona 85073 (602) 257-7288 BRUCE NORTON Norton, Burke, Berry & French, P.C.

3216 N. Third Street Suite 300 Phoenix, Arizona 85012-2699 (602) 264-0033 p ^

Attorneys for \

Pa,ci i Gas nd Elect 1 C m any B ./ .\ '

' I PhilipA Crane, r.

Dated: December 23, 1981 8112290008 811223 PDR ADOCK 05000275 #g G PDR n

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vi y 7 WESTINGHOUSE ELECTRIC CORPORATION TAMPA DIVISION TAMPA FLA.

TITL E: IMMERSION HEATER SPEC.

5 EXPOSED TO PRIMARY DESIGN EXPOSED TO C PRESSURE AND TEMPERATURE 7 ATMOSPHERE 8 9 10 + d-

.19 REGION FOR HEATER WELL TO HEATER WELD JOINT

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(5 ITEM DESCRIPTION ITEM DESCRIPT10N 7 CERAMIC TERMINAL BLOCK 8 1/4" BOLT - Hr.X HEAD 1 HEATER SHEATH g g,,

2 SHEATH END PLUG 10 1/4" LOCK NUT - HEX HEAD 3 ADAPTOR 4 L-SHAPED LUG BRAZED TO PIN g . ;, , , , ,,

5 RUBBER BOOT 6 LUG DIVIDER V

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TIT L E: IMMI.RSION HEATER SPEC.

TOTAL WATTS PER ITEM L A WATT RATING PRESSUR12ER VOLTAGE DESIGN AND NO. MIN. MAX. PER HEATER ONE(1) PHASE OPERATING 84 SERIES 100 SERIES CONDITION 9 TNCHr5 TNCHES - W1 5* W W V, A-C F. PSTA 10 55.25 73.75 12.82 1000 -

380 Note 1.

4 55.25 73.75 12.82 1000 -

480 Unless 7

2 55.25 71.75 73.75 90.25 12.82 1C.67 1000 1300 -

575 480

[t following 77.25 95.75 17.95 1400 2100 co t ons 9 380

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=> < 5 77.25 95.75 17.95 1400 2100 480 heaters: >'

8 77.25 95.75 17.95 1400 2130 575 Design 11 88.25 106.75 20.51 1600 -

380 Temp.-680 F 12 88.25 106.75 20.51 1600 -

480

-2500 13 88.25 106.75 20.51 1600 -

575 PSIA 14 99.25 117.75 23.0R 1800 -

380 Operating 3 99.25 117.75 23.08 1800 -

480 Temp.-653 F 6 99.25 117.75 23.08 1800 575 j50 es PSIA ISSUED' SHEET 2 of 9 A

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v WESTINGHOUSE ELECTRIC CORPORATION TAMPA OlVISION TAMPA, FLA.

TIT LE: Iwasms nexrra spec.

1.0 Ceneral Desien --

The primary function of the immersion heaters is to heat and maintain water at operating temperature and pressure in the pressurizer vessel of a pressurized water nuclear power plant. The heater shall be a single unit, ungrounded straight sheath type with terminal facilities at one end adapted for replaceability of the heater.

The heater shall include a corrosion resisting austentic stainless steel sheath, plug welded at one end, and a hermetically sealed terminal connector attached at the other end.

Connected to the terminals of the connector shall be conductors which, in turn, will connect to the resistance heating element made from Nichrome.

Surroundine the electrical parts within the sheath shall be compacted Magnesium Oxide Insulation. The heater shall be designed to operate in water inside a pressurized vessel.

2.0 Scope This specification covers the technical requirements and nrinciple features of the immersion heaters to be built for Westinchouse Electric Corp., Tampa Plant (WTP).

As shown on pg. 1 & 2, a portion of the ' neater forms a pressure retaining boundary during l normal operation and a portion is exposed to atmospheric conditions. That portion of the heater forming a pressure retaining boundary durina normal operation is to be considered as a part or appurtenance as defined by Section III of the ASME Code and is to meet the rules of Section III pertaining to parts and/or appurtenances as applicable.

The code class of this portion of the heater is to be considered Code Class 1. The heater supplier is requirtd to supply a code certified heater.

That portion of the heater exposed to the atmosphere and that part which forms an ancillary (or back-up) pressure boundary need not meet Section III design criteria; however, it is to meet Section 6 of this specification.

3.0 Manufac_t,urer's Responsibility (h'T")

The component manufacturer will be responsible for:

a.

The design of the heater that forms the pressure retaining boundary.

b. The stress report of the part which will be incluoed as a section of the component stress report.

c.

The disposition of all variations from drawing.

d. The updating of this specification to conform to the latest code or code addenda in effect.

( SUB ISSUED M Y 36'E 1 l

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v WESTINGHOUSE ELECTRIC CORPORATION TAMPA DIVISION TAMPA,FLA.

TI T LE: IMMtRsros nrATrR sprC. l 4.0 Suppl _ f.er's Resgo,nsibility .,

The heater supplier (or his vendor) will be responsible for:

a. The electrical parameters of the heater.

b. The ancilliary pressure boundary and the design of that part of the heater which is exposed to the atmosphere.

c. The conformance of the heater to the revision of this specification, and the revision of Section 111 of the ASME Code specified on the purchase order.

d. The conformance to the designation of a part or appurtenance av specified on the purchase order.

e. The performing of all welds, including the end plug weld.

5.0 Materials of Construct _ ion Each heater assembly is to consist of:

a. Drawing lten 50. 1 (tubular heater sheath), SA-213 Type 316 Stainless Steel, SA-655RM, RV and RZ. Cobalt content in the sheath material shall be less than 0.2 percent. Hydrostatic lest in accordance with A5ME SA-450. Material certified as solution treated and water quenched or must meet ASTM 262 Practice A or E.

No repairs by welding. Sheath is to have a 63 RMS finish.

b. Drawing item No. 2 (conical sheath end plug), SA-479 Type 316 stainless steel, SA-654 RY/RZ, RX. Cobalt content in the sheath matirial shall be less than 0.2 percent. Paterial certified as solution treated and water quenched or nust meet ASTM 262 Practice A or E. End plug is to hase a 63 RMS finish.

=> < c. Drawing Item No. 3 (adaptor), either SA-213 or SA-479 Type 304 or Type 316 ><

stainless steel. Adapter is to have a 125 RMS finish.

d. Weld joint (sheath-to-end plug). Each completed weld joint must be free of sensitized stainless steel. The welding procedure must be qualified as producin only welds free of sensitized material _o_r each completed weld joint cust pass the oxalic etch test or, the material may be screened with a sensi-tization test prior to welding. Weld joint is to have a 125 RMS finish.

c. One herretic seal receptacle (if required by adaptor design), made fron tvpc 316 or 304 stainless steel, for housing heater element end connections which terminate from a ceramic insulator with bolt and nut type lugs.

f. Nuts and bolts for attaching the cable (heater supplier not required to supply cable.)

g. Silicone rubber boot and insulating lug divider to protect the cable connections. j

h. Magnesium oxide insulation which has a minimum purity of ninety-eight (S8) percent.

1 SUB ISSUEDEL4Y l 61550 gj 393A70/

v SHT 4 OF 9 SHTS

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v WESTINGHOUSE ELECTRIC CORPORATION TAMPA DMSION TAMPA, FLA.

TIT LE: mm n.: nmn wrc.

-. 6.0 Mechanical Desien Data *

a. The tubing that forms the sheath shall have a gauge of .125 min. in the final swaged condition.

b. If one is supplied the adaptor section shall have a gauge of .19 min.

in the final condition.

c. The heater supplier or his vendor shall design the terminal connector if one is supplied and the portion of sheath exposed to the atmosphere for an internal pressure of 2300 psia at 680 F without Icakage to the atmosphere in the unlik(?y event of a sheath rupture. Proof can be made by actual test or calculatinn.

d. The heater supplier or his vendor shall design the heater end seal to contain ,

primary fluid (at design condition above) in the event of failure of the heater sheath. An empirical test such as hydrotest at 3750 PSIC would be sufficient proof.

e. The outside diameter of the heater sheath shall be .880/665 inches.

f. The outside diameter of the adaptor (if required) shall be 1.754 maximum. The vent hole weld (if required by design) shall not project greater than .050 beyond the adaptor surface.

g. The effective heated length, cold length, and overall length as specified on Sheet I and 2.

h. The external insulating block surrounding the terninal pins shall exhibit a low hygroscopic property. Modification to the block, such as glazina, for the purpose of reducing moisture absorptien is permissable.

i. The 5.0 maximum heater termination length shall be measured f rom the cold length end to the rigid end extension, being either the terminal luts or lun divider, whichever is longer. The rubber boot may extend beyond this dimension.

7.0 Electrical Desien Data

a. The heater shall be designed to operate on the circuit parameters as specified on Sheet 2.

b. The watt density shall be 85 watts /in nominal.

c. The minimum desien life of each heater shall be 10,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> at full power with 5,000 "on-orf" cycles, or 20,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> at 1/2 power with 10,000 pro-portisaally controlled voltage cycles of +30% and -40% f rom the 1/2 power level.

d. Heater assembiv shall be insulated to withstand a 1000 volt potential between the heating element and heater sheath at design temperature.

c. The watt rating at design voltage and temperature shall be within plus or minus five (5) percent of the design rating specified on Sheet 2.

SUB lSSUED MAY 16 '

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v WESTINGHOUSE ELECTRIC CORPORATION TAMPA DIVISION TAMPA, FLA.

TI T LE: IMMERSION HEATER SPEC.

8.0 Welds *

a. All external heater assembly welds to be gis tungsten arc welds and to be liquid penetrant examined, with no indications. Welds may be reworked to meet this requirement.

b. All external welding including the end plug weld to be in accordance with ASME Boiler & Pressure Vessel Code Section III. (See Para. 9 for inspection requirements) Vendor to submit welding procedure and qualification to WTP and obtain approval before start of fabrication.

9.0 Inspection and Testing

a. Each heater is to be radiographed full length, in two (2) planes, 90 apart.

Maximum separation of heater elements and/or conductors shall be shown in one of the planes. Technique and procedure sheets are to be submitted to and subject to Nestinghouse Approval. Radiographs may be taken using paper film, except the end plug weld. Deviations from supplier's drawing which are detected through radiography must be submitted to Westinghouse for review, if parts are intended for shipment. Supplier to maintain radiographic documents for a minimum of one (1) year and may be destroyed at the end of period provided prior approval is obtained from Westinghouse. Westinghouse may elect to exercise the option to have the radiographs transmitted to Westinghouse for contint.ed storage. These radiographs are to be taken to verify the acceptability of internal electrical /

mechanical drawing requirements, and the supplier is to certify that these req-uirements have been satisfied. The radiographic requirements for the end plug weld, as defined by the ASME Section III Code. must be satisfied including the

=> < transmittal of such documents (if any) to the owner or his designee. ><

SUB ISSUEDNAY 16 '-'

Z/ 393^70I V SHT r. OF o SHTS A

v WESTINGHOUSE ELECTRIC CORPORATION TAMPA DIVISION TAMPA,FLA.

TIT LE: mrusms nrm wrc.

. 9.0 Continued

b. A water immersion test shall be performed on each beater, after all fabrication has been completed and the heater sealed. This may be done prior to the addition of the loose filled insulation at the adaptor and prior to the attachment of the terminal lugs if desired by heater supplier.

Test Procedure as follows:

1) insulation resistance megger test to 1000 volts d.c. at room temperature (78 F plus 25 F or minus 10 F)

2) energize heater until the design temperature (680 F) is achieved then immediatly follow with Step 3.

3) submerce the entire heater in room temperature water *.

4) repeat Step 1.

A minimum of 2000 megohms is required for acceptance. Any heater testing less than 2000 megahms of insulation resistance, at the completion of the immersion test, shall be repaired or otherwise rejected.

c. Ground test (High Potential) each heater for one (1) minute at twice the rated voltage (specified on Sheet 2) plus 1000 volts a-c, 60Hz between the conductor and sheath. Test to be conducted at room temperature.

d. After testing of the heater assembiv is completed the heater sheath shall be checked for straichtness. This shall be done by inserting the heater sheath

"> < in a gauge of heavy wall tubing of sufficient length to accomoda e the entire heater. No force other than the weight of the heater itself shal. be allowed

>(

to insert the heater into the test gauge. The insid:: diameter of the gauge shall be 0.890 to .895 inches. Any alternate method of inspection must be approved by 'iTP Ouality Assurance Dept.

e. All tests and inspections, when applicable, shall be in compliance with ASME Code Section III. The Vendor shall submit a detailed outline of each test procedure for approval by WTP. The outline must include tests to disclose tubing surface defects, wattage rating, dielectric strength, insulation resis-tance, and hydrotest (if used in Section 6.0, c 6 d).

f. NTP will have the right to accept or reject component on the basis of these tests and/or examination reports. Certified copies of such tests and/or examination shall b. furnished by the vendor several days in advance of date of shipcent.

SUB ISSUEDWAY 10 '

2/ 39.9A 70/

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v WESTINGHOUSE ELECTRIC CORPORATION TAMPA OlVISION TAMFA, FL A.

TIT LE: 1xstasIns arATrx serc.

-. 9.0 Continued

• NOTE: Water used for this purpose shall be of the following quality:

Chloride ion Maximum ppm 1.00 Floride Maximum ppm .15 Total Solids Maximum ppm 10.00 Conductiv'.ty Maximum Micrombos/cm 20.00 Ph Range (.0-8.0 Visual Clarity, No Turbidity, Oil or Sediment.

Certification of water chemistry tests to be submitted for information to WIP.

10.0 Other Requirements

a. The curface of the heater shall be polished with a resin bonded aluminum oxide grit before final megger testing without going below minimum wall. Oxide discoloration in excess of two (2) percent of the sheath surface shall not remain after the re-maval process. The surface of the heater shall then be liquid penetrant examined in accordance with the ASME Code, Section .II and the surface shall meet the accep-tance standards of tne ASME Code,Section III with the rounded indications being 1/16 in. instead of 3/16 in.

b. The vendor shall obtain WTP approval of outline assembly drawines of the component before fabrication begins. One reproducible of each drawing is required. WTP will

"">< reproduce the number of copies required for their own use. > (

c. The manufacturer shall furnish WTP three (3) copies of pertinent information cover-ing the following items:

(1) Certification of compliance with requirements of ASME Boiler and Pressute Vessel Code Section 111 as far as pressure boundary naterial certification from suppliers shall be in acccrdance with the ASME Code,Section III. Welder qualification shall be in accordance with Section IX.

(2) Copies of all NDE ProceJures shall be submitted for appreval before fabrication begins.

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SUB ISSUEoNAY 1 6 1960 zj 393A70/

V SHT R OF 9 SHTS

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V WESTINGHOUSE Et ECTRIC CORPORATION TAMPA DivlSION TAMPA, FLA.

TITLE: 1xxEaslos Hr.ATER SI'EC.

_ 10.0 Continued .

d. Each heater shall bear permanent markings, on the portion exposed to the atmosphere, for identification purposes which shall include the following data:

(1) Rated voltage (2) Rated power input (3) Manufacturer's name (4) Heater identification number

e. Heater assemblies shall be packaged, packed, and marked per a procedure proposed by the supplier and approved by Westinghouse. The heaters shall be shipped to WTP, Tampa, Florida.

f. Heaters will be hydrostatic tested at Westinghouse, in accordance to ASME Code Section III, during the hydrctesting of the pressurizer. Defects disclosed by this test, which prove to be traceable to material or supplier workmanship will be cause for rejection and will be returned to the vendor for repair or replacement at no additional cost to WTP.

Spare heaters may be hydrostatically tested to Section III, usireg Proc. Spec.

84356KD and shipped as replacements to the field, for direct installation into a pressurizer. Currently, WTP is performitg this test.

11.0 As-Built Deviations

a. Localized under minimum outside conditions are allowed down to a minimum

=> < outside diameter of 0.660 inches. The totag area of each localized underminimum condition not to exceed 0.5 in and there is to be a minimum >{

of 1.000 inch separation between these localized areas. The wall thickness in the underminimum area is not to be below 0.125 inches. Conditions exceeding this are to be reported to WTP for disposition.

SUB ISSUEDLAY 1 6 7800 2/ 3.92 A 701 V SHT 9 OF 9 SHTS A

Interrogatory 61:

Describe in detail the current status of the EPRI valve performance

• testing program. In your response state:

.a. when the relief and safety valve testing will'be completed;

b. under what conditions (e.g., transition flow, full water flow, saturated steam, etc.) have the relief and safety valves been tested to date;

c. whether any of the relief and safety valves tested have failed, suffered galling or been in any way damaged during the testing, and, j if so, describe in detail the circumstances of such occurrences;

d. why the relief and safety valve testing program completion date has

! been delayed and when the program is now scheduled to be- completed;

e. whether an EPRI block valve testing program is planned and, if so, when it will be completed;

f. other than the block valve failures discussed at the Diablo Canyon low power test hearing in May 1981, whether any of the-block valves tested have failed, suffered galling, or been in any way damaged

during the testing, and, if so, describe in detail the circumstances of such occurrences;

g. whether PGandE has submitted to the NRC a correlation or other evidence to substantiate that the valves tested in the EPRI program demonstrate the functionability of the relief and safety valves installed at Diablo Canyon, and, if so, describe that correlation in detail;

h. to what extent, if at all, the control circuitry, piping, and supports associated with the Diablo Canyon relief and safety valves have been qualified and the results of any related tests or analyses;

i. when the " correlation" referred to in subpart (g) of this interrogatory will be submitted to the NRC.

Response 61:

PGandE objects to those parts of this interrogatory related to safety valves on the basis of relevancy. The contention itself (Low Power Contention 12 as well as Clarified Contentions 8 and 9) relates only to block valves and relief valves. Information on safety valves clearly is beyond the scope of the contention.

a. Relief valve testing has been completed.

b. The relief valve testing conditions have included the following:

full pressure steam, water, transition and loop seal simulation conditions.

c. One of the relief valve models, a Masoneilan series 20,000 relief valve, tested by EPRI is representative of Diablo Canyon. This valve

passed testing criteria and fully opened and closed on demand under the tested conditions stated in subpart (b). No other relief valve

, tested by EPRI is representative of Diablo Canyon.

d. The relief valve testing completion date was delayed due to test ,

facility construction delays. However, relief valve testing has now been completed.

e. No EPRI block valve testing program is planned.

f. Other than the block valve failures discussed at the Diablo Canyon low power test hearing in May 1981, no other block valve tested by EPRI failed during EPRI block valve testing.

g. PGandE has submitted to the NRC a letter dated June 29, 1981 stating that a relief valve tested at EPRI was representative of Diablo Canyon, specifically, a Masoneilan series 20,000 relief valve. A plant-specific report correlating the test results on this valve with the Diablo Canyon valves is required to be submitted to the NRC by July 1982. .PGandE has committed to meet this requirement.

h. Qualification of relief valve control circuitry, piping, and supports

-is not part of the EPRI program.

i. By July 1982.

I have assisted in preparing the answer to Interrogatory 61 and the answer is true to the best of my knowledge and belief.

u G. C. Wu Subscribed and sworn to before 3 me this 22nd day of December, 1981

! The6dora'Cooke, Notary Public in and for the City and County of San Francisco, State of California My Commission expires January 28, 1985 i

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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION In the Matter of )

)

PACIFIC GAS AND ELECTRIC COMPANY ) Docket No. 50-275

) Docket No. 50-323 Diablo Canyon Nuclear Power Plant, ) -

Units 1 and 2 )

)

CERTIFICATE OF SERVICE The foregoing document (s) of Pacific Gas and Electric Company MMHt: (have) been served today on the following by deposit in the United States mail, properly stamped and addressed:

Judge John F. Wolf Mrs. Sandra A. Silver Chairman 1760 Alisal Street Atomic Safety and Licensing Board San Luis Obispo, California 93401 U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Mr. Gordon Silver 1760 Alisal Street Judge Glenn O. Bright San Luis Obispo, California 93401 Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission John Phillips, Esq.

Washington, D. C. 20555 Joel Reynolds, Esq.

Center for Law in the Public Interest Judge Jerry R. Kline 10951 W. Pico Boulevard - Suite 300 Atomic Safety and Licensing Board Los Angeles, California 90064 U. S. Nuclear Regulatory Commission Washington, D. C. 20555 David F. Fleischaker, Esq.

P. O. Box 1178 Mrs. Elizabeth Apfelberg Oklahoma City C/o Nancy Culver Oklahoma 73101 192 Luneta Drive San Luis Obispo, California 93401 Arthur C. Gehr, Esq.

Snell & Wilmer Janice E. Kerr, Esq. 3100 Valley Bank Center Public Utilities Commission Phoenix, Arizona 85073 of the State of California 5246 State Building Bruce Norton, Esq.

350 McAllister Street Norton, Burke, Berry & French, P.C.

San Francisco, California 94102 3216 N. Third Street Suite 300 Mrs. Raye Fleming Phoenix, Arizona 85012-2699 1920 Mattie Road Shell Beach, California 93449 Chairman Atomic Safety and Licensing Mr. Frederick Eissler Board Panel Scenic Shoreline Preservation U. S. Nuclear Regulatory Commission Conference, Inc. Washington, D. C. 20555 4623 More Mesa Drive Santa Barbara, California 93105

$ 0 Chairman Judge Thomas S. Moore Atomic Safety and Licensing Chairman Appeal Panel Atomic Safety and Licensing U. S. Nuclear Regulatory Commission Appeal Board Washington, D. C. 20555 U. S. Nuclear Regulatory Commission Washington, D. C. 20555 -

Secretary U. S. Nuclear Regulatory Commission Judge W. Reed Johnson Washington, D. C. 20555 Atomic Safety and Licensing Appeal Board Attn.: Docketing and Service Section U. S. Nuclear Regulatory Commission Washington, D. C. 20555 William J. Olmstead, Esq.

Bradley W. Jones, Esq. Judge John H. Buck Office of Executive Legal Director Atomic Safety and Licensing BETH 042 Appeal Board U. S. Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Washington, D. C. 20555 Mr. Richard B. Hubbard MHB Technical Associates 1723 Hamilton Avenue, Suite K San Jose, California 95125 Mr. Carl Neiberger Telngram Tribune P. O. Box 112 San Luis Obispo, California 93402 Herbert H. Brown, Esq.

Lawrence Coe Lanpher, Esq.

Christopher B. Hanback, Esq.

Kirkpatr,ick, Lockhart, Hill, Christopher & Phillips 1900 M Street, N.W.

Washington, D. C. 20036 Byron S. Georgiou, Esq.

Legal Affairs Secretary Governor's Office State Capitol Sacramento, California 95814 f ^

. ,/ . l f)

PhipdpA. Crkne, Jr.

Attornky Pacific Gas and Electric Company Date: December 23, 1981

PACIFIC OAS AND E LE C T RIC C C M PANY P. O. BOX 7 44 2 . 77 BE ALE STREET. 31ST FLOOR,5 AN FR ANCISCO, C AllFORNI A 94106

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TO: SERVICE LIST Please add the following names to the list of potential PGandE witnesses:

Duane Lieb -

San Luis Obispo County Director of General Services Howard Mankins - Member, Board of Supervisors, San Luis Obispo County Gary Smith -

TERA Corporation - responsible for the firm's transportation and socioeconomic services to industry Tony Woods -

San Luis Obispo County Sheriff's Office Very truly yours, s

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