N A E S C o r p o r a t i o n. Energy people making energy facilities work Better!

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1 N A E S C o r p o r a t i o n Energy people making energy facilities work Better!

2 C o r p o r a t e S u m m a r y Founded in ,800 employees and $300+ million in revenues O&M track record of 173 energy facilities and 48,403 MW Over two decades of renewable energy experience Nearly three decades of complementary major maintenance Multi-national company with projects spanning 19 countries World-class leadership team 2

3 B u s i n e s s S e g m e n t s & C a p a b i l i t i e s Operations & Maintenance Staffing Services Maintenance, Repair, & Overhaul Turbine Component Repair Turbine Field Services Technical Support Services 3

4 S t r a t e g i c D i r e c t i o n Accelerate O&M Leadership Build Renewables Leadership Advance Technical Support Services Expand Major Maintenance Presence Strengthen The Core 4

5 E x p e r i e n c e 173 O&M Projects (to-date) 48,403 MW 119 O&M Plants (current) 33,820 MW 134 Transitions Renewable Energy (Since 1987) Biomass Wind Small Hydro Geothermal Tires Municipal Waste Land Fill Gas Biosolids 5

The NAES Advantage Total Solutions for Today s Market Long-standing history of growth Market leadership in third-party O&M Extensive and diverse O&M portfolio Experienced

6 The NAES Advantage Total Solutions for Today s Market Long-standing history of growth Market leadership in third-party O&M Extensive and diverse O&M portfolio Experienced leadership team Exceptionally strong relationships Demonstrated customer loyalty Sophisticated approach and infrastructure Strong track record of operations success Financial strength 6 23

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N A E S P o w e r C o n t r a c t o r s C o m p a n y O v e r v i e w NAES Power Contractors is a wholly owned subsidiary of NAES Union Labor based construction and major maintenance contractor

8 N A E S P o w e r C o n t r a c t o r s C o m p a n y O v e r v i e w NAES Power Contractors is a wholly owned subsidiary of NAES Union Labor based construction and major maintenance contractor providing mechanical and electrical services throughout North America Major Power Plant Maintenance Major Capital Project Construction Power Plant Rehabilitation and Modernization Hydroelectric Projects and Major Maintenance Substations and Switchyard Projects Electrical Projects (<15kV) Nuclear Fuel Storage Projects Operating divisions in Portland, OR and Pittsburgh, PA with a regional office in Kansas City, MO Annual revenues of over $100M Outage workforce up to 1,000 craft personnel Over 27 years in business 8

9 N A E S P o w e r C o n t r a c t o r s C o r p o r a t e O r g a n i z a t i o n R. Moore President J. Hardy Sr. Vice President & CCO J. Meyer General Manager Western Division R. Faull Vice President & General Manager Eastern Division C. Boyer Corporate Health & Safety Manager G. Wendzicki Business Development Manager - East J. Stender Director of Maintenance Open Safety Specialist M. Schneider Business Development Manager - West 9

10 U n i t 3 R e h a b i l i t a t i o n OWNER - KETCHIKAN PUBLIC UTILITIES OWNER S ENGINEERING FIRM HATCH OWNER S RUNNER SUPPLY AMERICAN HYDRO 10 23

11 U n i t 3 R e h a b i l i t a t i o n THE PROJECT TEAM NAES POWER CONTRACTORS PRIME CONTRACTOR JIM BYRD JOHN STENDER MACHINIST INC SUBCONTRACTOR JEFF TOMSOM BALL SPIN ENGINEERING SUBCONTRACTOR GARRETT SMITH PME BABBIT BEARINGS SUBCONTRACTOR CHET CHAFFIN MACHINERY INSTALLATION & MAINTENANCE SUBCONTRACTOR MARTIN BRADLEY 11

12 U n i t 3 R e h a b i l i t a t i o n THE PROJECT NAES Power Contractors completed complete rehabilitation services on Unit 3 at the Ketchikan Hydro Plant in 2009 in Ketchikan, Alaska. 12

13 NAES Power Contractors supplied the supervision for the onsite and offsite labor 13

14 U n i t 3 R e h a b i l i t a t i o n NAES Power Contractors was responsible for disassemble and reassemble procedures to post assembly acceptance testing. 14

15 U n i t 3 R e h a b i l i t a t i o n NAES Power Contractors was faced with unique challenges due to the absence of the manufacturer s drawings and specifications. 15

16 U n i t 3 R e h a b i l i t a t i o n NAES Power Contractors provided a full time representative at the subcontracted machine shop to provide technical support and quality control inspection services for the bearing refurbishment. 16

17 U n i t 3 R e h a b i l i t a t i o n THE EQUIPMENT Pelton Waterwheel Company Type - Francis Head 250 ft Rated power 2500 hp Speed 720 RPM Wicket Gates 14 Runner- American Hydro Generator GE 1750 kva volt 17 23

18 U n i t 3 R e h a b i l i t a t i o n CHALLENGES 1. Logistics 2. Lack of drawings 3. Reproduction of parts 4. Challenge to performing all machine work offsite 5. Centering of turbine runner to stationary wear ring 18 23

19 U n i t 3 R e h a b i l i t a t i o n 19

20 U n i t 3 R e h a b i l i t a t i o n Disassembly at Ketchikan 20

21 U n i t 3 R e h a b i l i t a t i o n NAES Power Contractors Ketchikan Unit 3 Refurbishment 21

22 U n i t 3 R e h a b i l i t a t i o n 22 23

23 U n i t 3 R e h a b i l i t a t i o n 23

24 U n i t 3 R e h a b i l i t a t i o n 24

25 U n i t 3 R e h a b i l i t a t i o n 25

26 U n i t 3 R e h a b i l i t a t i o n 26

27 U n i t 3 R e h a b i l i t a t i o n 27

28 U n i t 3 R e h a b i l i t a t i o n 28

29 U n i t 3 R e h a b i l i t a t i o n 29

30 U n i t 3 R e h a b i l i t a t i o n 30

31 U n i t 3 R e h a b i l i t a t i o n 31

32 U n i t 3 R e h a b i l i t a t i o n 32

33 U n i t 3 R e h a b i l i t a t i o n 33

34 U n i t 3 R e h a b i l i t a t i o n 34

35 M a c h i n i s t s I n c. Jeff Tomson Machinists Inc. Seattle WA 35 23

36 M a c h i n i s t s I n c. Project Scope Rebuild Wicket Gates Rebuild Wear Rings Rebuild Face Plates Replace Bushings Remanufacture Wicket Gate Arms Recondition Operating Ring 36

37 M a c h i n i s t s I n c. Disassembly of Components at Machinists Inc. Seattle, WA 37

38 M a c h i n i s t s I n c. Assessment of Component Wear and Condition 38

39 M a c h i n i s t s I n c. Wicket Gate Arms Determined to be Unusable 39

40 M a c h i n i s t s I n c. Transfer Drill Process for Facing Plates 40

41 M a c h i n i s t s I n c. Transfer Drill Process for Facing Plates 41

42 M a c h i n i s t s I n c. 42

43 M a c h i n i s t s I n c. Final Bore Thru ALL 4 Components 43

44 M a c h i n i s t s I n c. 44

45 M a c h i n i s t s I n c. 45

46 M a c h i n i s t s I n c. 46

47 M a c h i n i s t s I n c. Wear Ring Manufacturing 47

48 M a c h i n i s t s I n c. Final Turning of Face Plate and Wear Ring 48

49 M a c h i n i s t s I n c. 49

50 M a c h i n i s t s I n c. Final Assembly Check Fit 50

51 M a c h i n i s t s I n c. 51

52 M a c h i n i s t s I n c. Document Delivery 52

53 M a c h i n i s t s I n c. Commercial Marine 53

54 M a c h i n i s t s I n c. Lawrence Livermore Laser Test Chambers 54

55 M a c h i n i s t s I n c. Military and Commercial Aerospace 55

56 M a c h i n i s t s I n c. Military Undersea Projects 56

57 M a c h i n i s t s I n c. Machinists Inc th Ave S. Seattle WA

58 M a c h i n e r y I n s t a l l a t i o n S e r v i c e s Machinery Installation & Maintenance Martin Bradley 58 23

59 M a c h i n e r y I n s t a l l a t i o n S e r v i c e s Machinery Installation Services was contacted by NAES Power Contractors to participate in the Ketchikan Unit #3 Rehabilitation project for shaft alignment services. Machinery Installation Services traveled to the site prior to the removal of the turbine to measure the outline and build any brackets that would be necessary for its equipment. It was discovered that without the generator removal, we would not be able to shoot a centerline

60 M a c h i n e r y I n s t a l l a t i o n S e r v i c e s Power Contractors to verify the housing alignment to the coupling, sole plates and turbine shut off valve. Additional measurements were documented during the installation, checking clearances as the turbine was reassembled

61 P M E B a b b i t t B e a r i n g s PME BABBITT BEARINGS Babbitt Bearing Repair Specialist Chet Chaffin 61

62 P M E B a b b i t t B e a r i n g s Started 1978 Largest Independently owned full service Babbitt Bearing repair & manufacturing corporation in North America Three (3) locations across the U.S. Cincinnati, OH Atlanta, GA Reno, NV 62

63 P M E B a b b i t t B e a r i n g s N.W. Hydroelectric Projects Seattle City Light Chelan County PUD US Army Corps of Engineers US Bureau of Reclamation PG & E NAES Snohomish County PUD Grant County PUD Puget Sound Energy 63

64 P M E B a b b i t t B e a r i n g s Excellent Quality Workmanship Licensee of Siemens Energy, Inc. ISO 9001:2008 Registered Corp OEM Audited and Approved Babbitt Procedures NDE Inspection Procedures Certified in NDE (Level II) Ultrasonic Inspection Liquid Penetrant Inspection Provide Repair and Manufacture Service for all major OEM s 64

65 P M E B a b b i t t B e a r i n g s Capabilities Centrifugal Casting to 120 O.D. Machining Capability to 144 O.D. Static Pouring (Unlimited) O.D. Restoration & Insulating Twin Wire Arc Metalizing Process Spherical Ball & Saddle Grinding Blue & Pinch Inspection Bearing Related Components In-house Evaluation Goal Meet or Exceed all OEM Requirements 65

66 P M E B a b b i t t B e a r i n g s Initial RFQ Number of bearings Type of bearing (Horizontal, Vertical, Thrust, etc) Approximate sizes (Bore & Length) Turnaround requirements Doing journal work Pulling rotor Any existing problems Excessive Heat, temperature spikes Vibrations Babbitt Material 66

67 P M E B a b b i t t B e a r i n g s OVERHAUL REPAIR FOR NAES January 21, 2009 Received #1 (2 15/16 x 11 ) #2 (6 x 20 ) #3 (7 x 12 ¼ ) #4 (5 x 8 ¾ ) 24 Thrust Shoes Thrust Housing (2) Thrust Runners Quoted 2 to 3 weeks in-house Shipped Bearings February 25, 2009 Actual time 24 days in-house 67

68 P M E B a b b i t t B e a r i n g s Work Performed Babbitt and Finish Machine Journal Clearance Final #1 Bearing / #2 Bearing / #3 Bearing / #4 Bearing / Clearance was approximately.0015 per inch of journal diameter (NAES) Inspection of spherical seat O.D. and housing I.D. #1 Thrust Bearings and housing was metalized, machined and a blue check performed to assure proper fit. # 1 Thrust Bearing and Housing was set up and the buttons skimmed to be perpendicular with the bore and parallel with the thrust faces. Supplied new pins for thrust shoes 24 Thrust Shoes Finished at /1.442 Thick (From Button) Clean and Inspect (2) Thrust Runners Witness inspections were performed by NAES. 68

69 P M E B a b b i t t B e a r i n g s Thrust Bearing Buttons Thrust Shoes 69

70 P M E B a b b i t t B e a r i n g s Return of Bearing # 3 & # 4 June 2009 Bearings were returned to PME Received Bearing #3 & #4 on June 25, 2009 # 3 Bearing # 4 Bearing 70

71 P M E B a b b i t t B e a r i n g s # 3 & # 4 Bearing / Additional Clearance #3 Bearing was machined with additional clearance #4 Bearing was re-cast and machined with additional clearance Previous Clearance New Clearance Additional #3 Bearing (.009 /.011 ).016 / /.007 #4 Bearing (.007 /.009 ) Typically we see.002 /.0025 clearance for horizontal bearings. Bearing temperature was not being measured at the babbitt bond line. Drilled for and installed thermocouples to measure bearing temperature Quoted 3 day schedule in our shop 71

72 P M E B a b b i t t B e a r i n g s Inspections Incoming TIR checks I.D. to O.D. concentricity checks I.D. / O.D. measurements Visual inspections Joint gap and contact Additional Customer requirements Varies with different customers 72

73 P M E B a b b i t t B e a r i n g s Inspections In Process and Final Inspections Ultrasonic Inspection Liquid penetrant inspection Joint contact Dowel pins I.D. / O.D. measurements Thrust Shoe Flatness (blue to granite table) Thrust Shoe Thickness measurements Final inspection Additional Customer requirements Varies with different customers 73

74 P M E B a b b i t t B e a r i n g s Final Inspection 12 ½ x 64 74

75 P M E B a b b i t t B e a r i n g s Pelton Turbine 75

76 P M E B a b b i t t B e a r i n g s Vertical Guide Bearings 104 O.D. x 48 I.D. 76

77 P M E B a b b i t t B e a r i n g s 135 O.D. Thrust Shoe (Set) 77

78 P M E B a b b i t t B e a r i n g s Small to Large Thrust Shoes 78

79 P M E B a b b i t t B e a r i n g s New Manufacture (Before) Turbine Guide Bearing 79

80 P M E B a b b i t t B e a r i n g s New Manufacture (After) Turbine Guide Bearings 80

81 P M E B a b b i t t B e a r i n g s 28 x 78 Horizontal Bearings 81

82 P M E B a b b i t t B e a r i n g s 24 I.D. Turbine Guide Bearings 82

Melton Series. Owners Manual. Lab Centrifuge. Model # s A C, A C, B C, B C, C C, C C, D C, D C

Melton Series. Owners Manual. Lab Centrifuge. Model # s A C, A C, B C, B C, C C, C C, D C, D C Melton Series Owners Manual Lab Centrifuge Model # s A-4-115-C, A-4-220-C, B-4-115-C, B-4-220-C, C-4-115-C, C-4-220-C, D-4-115-C, D-4-220-C Serial Numbers 85500 & Above NOTICE Wire this centrifuge according