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Home My WebLink AboutStaff Report 4.A 12/07/2007PROJECT NUMBER C500402 " LU .185 CONSTRUCTION MANAGEMENT PROGRESS REPORT No. 25 October 2007 4.A December 17, 2007 The ® Covello Group PARTICIPANTS Owner: City of Petaluma Mike Ban 11 English Street Director Petaluma, CA 94952 (707) 778-4487 Margaret Orr Engineering Manager (707)778-4589 Contractor: Kiewet Pacific Co. Charlie Gardner 5000 Marsh Drive Project Manager Concord, CA 94520 (925) 516-4600 Larry Koneck Project Engineer (707) 782-9826 Ext. 31 Design Engineer: Carollo Engineers Tom Patten 2700 Ygnacio Valley Rd, Suite 300 Principal Walnut Creek, CA 94598 (925) 932-1710 Doug Wing Design Engineer (925)299-6733 Environmental ESA Jim O'Toole Management: 8950 Cal Center Drive, Bldg 3, Suite 300 Project Engineer Sacramento, CA 95826 (707) 795-0900 Jennifer Garrison Environmental Manager (916)564-4500 Programmer: ArcSine engineering Doug McHaney 970 Executive Way Project Manager Redding, CA 96002 (530) 222-7204 Steve Stewart Lead Programmer (530)222-7204 Construction The Covello Group Bruce Presser Manager: 1660 Olympic Blvd, Suite 300 Principal Walnut Creels, CA 94596 (925) 933-2300 Ken Sinclair Construction Manager (925)260-2943 Ed O'Brien Field Engineer (925)382-1246 SUMMARY OF CONSTRUCTION STATUS ® Contractor: KIEWIT PACIFIC CONSTRUCTION Base Contract Amount (Total Project) .................................... $ 110,329,000.00 Change Orders Executed .................................................. $ 2,121,311.00 Total Contract Cost ......................................................... $ 112,450,311.00 Contract Amount Earned ................................................... $ 84,439,521.00 Progress Payment for October 2007 (excludes retention) .............. $ 3,567,818.00 Previous Progress Payments (excludes retention) ...................... $ 72,428,394.00 Estimated Percent Complete............................................................. 75% a Design Engineer: Carollo Engineers Authorized Budget (Total Project) ....................................... $ Billingsto Date...............................................................$ • Environmental Manager: ESA Authorized Budget (Total Project) ...................................... $ Billingsto Date...............................................................$ ArcSine engineering Authorized Budget (Total Project) ....................................... $ 4,354,075.00 3,351,311.05 1,434,830.00 773,205.67 2,340,951.00 Billings to Date...............................................................$ 1,428,497.16 • Construction Manager: The COVELLO GROUP, Inc. Authorized Budget (Total Project) ....................................... $ 10,231,509.00 Billings to Date...............................................................$ 4,807,449.81 3 Schedule Notice to Proceed ................................... Base Contract Duration .......................... Original Completion Date ...................... Time Extension Authorized ................... Revised Duration .................................... Revised Completion Date ............................................ Weather Days (included in base duration) ................... Weather Days Expended (included in time expended) TimeExpended............................................................ Percent Time Expended ............................................... 4 ....................... October 10, 2005 ............... 1278 consecutive days .............................. April 9, 2009 .......................................67 days ............... 1345 consecutive days ............................ June 15, 2009 .......................................40 days ....................................... 82 days .................................... 751 Days ............................................ 56% Construction Manager's Summary 1. Schedule The project remains on schedule for completion by June 2009. 2. Work Progress Rookery The Heron Rookery is no longer active. The 500 foot buffer has been returned to the non -breeding period buffer of 250 feet. Yard Piping The following pipelines were placed this month: • The 16" Headworks Effluent pipe was installed at the Oxidation Ditches. • The 20" RAS pipe was installed at the RAS pump station. • The 20" Foul Air piping was installed at the Screw Press building. Electrical Duetbanks The following ductbanks were placed and backfilled this month: • The ductbank south of the Oxidation Ditches was placed. Oxidation Ditches Kiewit's electrical subcontractor, Mass Electric, placed several light posts and aerator motors at Oxidation Ditch No. 1. Secondary Clarifiers The repaired sweep mechanisms were re -installed into the clarifiers. The walkway at each clarifier was placed; these walkways will provide maintenance access to the central drive motors. Return Activated Sludge (RAS) Structure Pipe fitters finished installing pipe, pipe supports, and valves within the structure. Tertiary Pump Station Pipe fitters finished installing pipe, pipe supports, and valves at this structure. Main Electrical Building Mass Electric continued to install devices within the structure. Metal studs were attached to the exterior walls in preparation for the installation of the exterior metal wall panels. Headworks Facility Kiewit completed pouring the remaining small concrete pads on top of the Headworks deck. Crews began welding T -lock (a corrosion resistant layer) within the inside channels of the Headworks. Headworks MCC Mass electric began installing the individual motor control centers and breakers within this MCC structure. Thickening Building Kiewit poured the roof slab of this structure and formed the parapet walls. Once the roof slab cured to proper strength, the falsework holding the roof up was disassembled and removed. Screw Press Building The screw press was lifted into the building and anchored to the concrete pad within the structure. Workers began installing falsework that will provide temporary support for the concrete roof slab. Methane Digester Kiiewit completed pouring the perimeter walls of the tank and workers welded the T -lock within the structure. Falsework erection began to provide temporary support for the domed, post -tensioned concrete roof. Operations and Maintenance Building Multiple subcontractors continued interior work in the building. The operations that continued throughout the month: installation of window glass, tile within the bathroom areas, painting the walls and structural steel, installing the ceiling grids, installing the laboratory equipment and cabinets, installing the copper parapet siding. Tertiary Filter Filter wall erection continued throughout the entire month. There are several walls that remain to be placed in this structure. Filter Support Mass Electric continued to install the motor control center and associated electrical equipment in the Filter Support electrical room. Mechanical crews installed ventilation ductwork inside the building. Recycled Water Pump Station Pipe fitters began installing the above ground piping and valves. Wetlands Pump Station The structural work is nearing completion and the above -ground mechanical work continues. This pump station is required to be operational by early 2008. Wetlands Planting The wetland plants that were drill seeded in the polishing treatment wetlands are begimiing to grow. Some of the wetland plants that were plugged in Pond 9 and Pond 10 are doing well. The wetland plants that were hydroseeded in Pond 9 and Pond 10 are yet to sprout. Plantings that did not survive or failed to grow in pond 9 are being replaced with plugs per the original schedule in the Contract Documents. Similar work should begin in pond 10 in the next few months. Start Up Meetings continue to refine and discuss the plan to start up the effluent facilities at the existing clrlorine contact basin. The start up will involve several pieces of equipment that will monitor chlorine levels and then residual to confirm that sufficient levels are maintained for disinfection and also that no chemical leaves the plant in the river discharge flows. These meetings are progressing well on this facility. 3. Contract Changes Thirty-two new change orders were processed in October. The sum of these change orders results in a net addition to the construction contract of $401,424.00. The complete list of contract changes is attached. Those executed in October and valued greater than $10,000 are as follows: Site Secutiry Lighting Estimation Cost Grading @ Mitigation Wetlands & RWSB PG&E power connection @ W Access Rd. Anchorage of Diffuser Pipe Ponds 9&10 Revised Details @ RWSB Mitigation Wetlands Drain — Permanent Installation Ops Building: Plumbing Dwqs. Below Grading Coatings 4. Field Orders $10,364 $27,012 $55,335 $32,659 $20,881 $75,048 $29,571 $72,507 Twelve new field orders were prepared this month. A total of one hundred twenty-one field orders have been prepared for the project. Of those, forty-two remain active with a total estimated value of $320,481. Active field orders greater than $10,000 areas follows: FO No. Description Amount 60 Headworks: Details for Stop Plates and Gates $20,068.00 79 Ops. Bldg.: 1 -Hr. Fireproofing at Steel Beams $10,000.00 85 Ops. Bldg.: Green Roof Detail at Lobby Parapet $24,249.00 86 Deepen Generator Fuel Lines and Sump $17,643.00 96 Headworks, Relocation of Local Control Stations and JBs $25,000.00 99 West Access Natural Gas Line Connection and Meter Pad $15,000.00 106 CCB: Addiition of Drain Vault Float and Clarification on Heat Trace Controller $15,000.00 108 Add Geotextile Fabric Along East Access Road $20,000.00 111 Handrail Post Pockets at Headworks $25,000.00 113 HVAC Modifications at Filter Support, Thickener & Screw Press $10,000.00 114 12 In. FI Connection to Filters $16,732.00 117 Modify Solids Handling Slab $15,000.00 Active Field Orders < $10,000 $106,789.00 Total $320,481.00 5. Testing Pipe was pressure tested and compaction testing was completed as needed throughout the month. Concrete sampling and testing was on-going. Samples were taken from each structural concrete placement and compression tests completed. 6. Anticipated Work for Next Month Mass Electric will continue installing conductors and for power and control to the aerators and other electrical equipment in the oxidation ditches. Work will also continue on a number of structures used to route flow to and from the oxidation ditches and clarifiers including the Secondary Effluent Junction Box, RAS Pump Station, Secondary Clarifier Flow Splitter, WAS Pump Station, and Oxidation Ditch Flow Splitter. Electrical work will also continue on the Tertiary Pump Station. Mechanical crews will begin installing equipment at the Headworks. Work will continue at the solids handling portion of the plant including the Thickening Building, Methane Digester, the Screw Press Building, and the Septage Receiving Station. The Acid Digester structural work will continue into the upcoming months. Kiewit will continue to pave several areas around the site, mainly concentrating on areas where structural work is complete. Installation of the Green Roof will continue at the Operation and Maintenance Building. Subcontractors will continue with various finish work throughout the building. SUBMITTAL STATUS FIELD ORDERS Total Cost of Total October Active Active Orders Field Orders Issued 121 12 42 $320,481.00 Total October Value of Change Orders Executed in October 32 $401,424.00 Value of Change Orders Executed to Date 222 $2,121,311.00 Percent to Date of Original Contract 1.92% WEATHER RELATED DELAYS Days Base Contract Allowance 40 Weather Related Days in October 0 Weather Related Days to Date 82 G Received To Date October Returned Pending First Time Shop Drawing Submittals 795 13 783 12 Request for Information 1128 41 1024 4 C. M. Request for Information 175 2 161 14 FIELD ORDERS Total Cost of Total October Active Active Orders Field Orders Issued 121 12 42 $320,481.00 Total October Value of Change Orders Executed in October 32 $401,424.00 Value of Change Orders Executed to Date 222 $2,121,311.00 Percent to Date of Original Contract 1.92% WEATHER RELATED DELAYS Days Base Contract Allowance 40 Weather Related Days in October 0 Weather Related Days to Date 82 G O.C. Jones placed and compacted asphalt along the east access road at the existing Oxidation Ponds. the crew placed the asphalt from the gate to just north of CCB. 10 II Kiewit Millwirght's placed the motors for the aeration equipment in the Oxidation Ditches. 12 Ellis Creel, Water Recycling Facility CONTRACT CHANGE ORDER TRACKING SHEET CCO Time RFQIFO # Description Amount (Days) NO. Status 1 Time extension for additional soil sampling 0.00 8 Executed 2 Lime treatment at Ox Ditch & Secondary Clarifiers 125,000.00 RFQ 011 Executed 3 Board up Farmhouse 3,385.00 FO 004 Executed 4 Hay Stacker Relocation 493.00 FO 002 Executed 5 Terrorism Insurance and Increased Earthwork 0.00 RFQ 001 Executed 6 Meter in Temporary Recycled Water Pipeline 3,023.00 FO 006 Executed 7 Temporary Power for Pond 1 Aerators 1,270.00 FO 007 Executed 8 Pavement Repair on Cypress and McDowell 419,681.00 RFQ Executed 9 Coloring Age Conduit Encasement Col ,000.00) RFI 62 Executed 10 Delayed Caltrans Encroackment Permit 16,723.00 FO 005 Executed 11 Trench Cut -Off Walls (18,600.00) RFI 057 Executed 12 Horizontal Aerators Extended Warranty Testing 0.00 RFI 152 Executed 13 Deletion of Prime Coat under AC Pavement (29,700.00) RFI 084 Executed 14 Replace Schad. Conduit in DB ( 21,774.00) RFI 081 Executed 15 Delete Lakeville Highway Access 40,000.00 RFQ 15 Executed 16 Contract Time Extension for Weather Days 03-04/06 0.00 38 C to Cm Ltrs Executed 17 Change Valve Types 0.00 RFQ 10 Executed 18 Replace EMT conduits by MC cable @ O&M Bldg (14,777.00) RFI 082 Executed 19 Inverter Duty Motors at Oxidation Ditch Aerators 16,466.00 CL 35 Executed 20 Aerated Lagoon and Pond 1 Modifications Milestone 0.00 Executed Executed 21 Additional ng and Loops on McDowell 13,747.00 22 Catch Basins Invert Changes (9,997.00) RFQ 13 Executed 23 Oxidation Ditch Sump Modifications (7,750.00) RFQ 02.002 Executed 24 Change Buried Conduits PVC GRS to PVC Sch. 40 (213,038.00) RFI 154 Executed 25 Temporary Power to Existing Aerators 4 and 7 7,956.00 FO 8 Executed 26 O&M Bldg: Ceiling & Wall Heights Rms 4,287.00 RFQ 20 Executed 27 Provide Portable Generator Pads at Ponds 2,554.00 FO 14 Executed 28 FS Bldg: Extend Conduit Stub -ups Beyond Ductbank 9,190.00 RFQ26 Executed 29 Headworks: Handrail Extension to Complete Deck 1,254.00 RFQ 27 Executed Executed 30 Pond 4 Aerator Temp Power 883.00 FO 10 31 Aerated Lagoon: Reconnecting of Aerator No. 2 537.00 FO 11 Executed 32 Unknown Utility at Pond 1 North Side 855.00 Executed Executed 33 Ductbank Encasement with Reinforcing 24,884.00 RFQ 31 34 Gun Safe for Storage of Bid Documents 2,410.00 FO 17 Executed 35 S&C Pad Mounted Switch Additions 75,200.00 RFQ 39 Executed 13 36 Permanent Power Supply for Pond 1 Aerators 98,000.00 RFQ 4 Executed 37 Temporary Fire Hose 851.00 FO 12 Executed 38 Change material for Temporary Debris Collector (36,150.00) RFI 061 Executed 39 Chemical Tank Pads (a) Filter Support Bldg 4,425.00 RFQ 22 Executed 40 Disconnect Aerator No. 2 & reconnect Pond 4 Aerators 607.00 FO 13 Executed 41 Delete Steel Steps in Manholes (19,012.00) RFQ 09 Executed 42 Add 4" Butterfly Valve in Acid Digester 1,189.00 RFI 245 Executed 43 Delete Pre -Action Fire System C) Main Elect. Bldg (19,242.00) RFQ 49 Executed 44 Headworks Influent Box Modifications 3,000.00 RFQ 44 Executed 45 Transformer Pad at Restroom 9,498.00 RFQ 17 Executed 46 Addition of Construction Joint at Oxidation Ditch Slabs 23,505.00 RFQ 33 Executed 47 Change Conduits from PVC Rigid Steel to PVC Sch. 40 (21,912.00) RFI 251 Executed 48 Reader Board & Geogrid placement @ Cypress/McDowell 6,000.00 FO 15 Executed 49 Plant Control System PLC Architecture (6,118.00) CL 17 Executed 50 Grit Pump Room Sump Pump Modification 1,326.00 RFQ 43 Executed 51 PLC Enclosure Size for PLCs 2, 3 and 8 5,446.00 RFQ 70 Executed 52 Additional Time Switches at O&M Bldg. 2,722.00 RFI 369 Executed 53 Extension for Pond 1 Aerators Milestone Date 0.00 spec 00800 Executed 54 Levee Repair at Berm Existing Ponds 8 & 9 289,279.00 Executed 55 Operations Bldg. Maintenance Window 1,022.00 RFI 151 Executed 56 In -Plant Pump Station Wall Penetration Details 2,807.00 RFQ 36 Executed 57 Alignment of 42" RSG line to Headworks 4,208.00 RFQ 23 Executed 58 Revision of Structural Joints at Headworks Facility 5,628.00 CL 21 Executed 59 Pond 9 & 10 Levee Pothole 1,400.00 FO 24 Executed 60 Add pipe for Future Pump Can C_ RWPS 6,316.00 RFQ 76 Executed 61 Home Inspection of Farm House 746.00 FO 30 Executed 62 Alignment of 42" PWE line to Cell D Transfer Structure 8,171.00 RFQ 86 Executed 63 Delete Locks on Motor Operated Overhead Coiling Doors (383.00) RFQ 091 Executed 64 Dewatering of Pond 8 and Mitigated Wetland 3,488.00 FO 19,21 Executed 65 UV System Programming 2,777.00 CL 7 Executed 66 Septic Tank Removal at Farm House 739.00 FO 016 Executed 67 Changes to Slide and Sluice Gates 11,177.00 sub. 190 Executed 68 PLC System Material for C Street Pump Station 14,915.00 RFQ 85 Executed 69 PLC - 10 Analog Input Module 1,873.00 RFQ 98 Executed 70 Change Storm Drain Pipe from RCP to CHDPE (72,398.00) RFI 59.001 Executed 71 Deletion of CMU Coating on non -occupied structures (2,538.00) RFQ 90 Executed 72 Existing Utilities at West Access Road Entrance 8,543.00 FO 28 Executed 73 Change Handrail for Polishing Wetlands Structures 6,965.00 RFI 442 Executed 74 Change SDR for HDPE Pipe Lines (52,415.00) RFI 338 Executed 14 75 Addition of waterstop in wall @ Filter Support Bldg. 1,330.00 RFQ 62 Executed 76 Delete waterstop & starter walls @ HW, RAS PS, UV (4,206.00) RFQ 55.001 Executed 77 Re -Power Pond Aerators, Reconnect Aerated Lagoon 3,718.00 FO 39 Executed 78 Contract Time extension for Weather Days 10/2006 0.00 1 C to Cm Ltrs Executed 79 Deletion of waterstop and starter walls at Tertiary Filters (1,384.00) RFI 352 Executed 80 Add waterstop at Grit Pump Area of Headworks Structure 6,167.00 FO 20 Executed 81 Fuel Tank Removal at Farmhouse 2,972.00 FO 29 Executed 82 Revised Anchorage for Oxidation Ditch Aerators 40,941.00 FO 44 Executed 83 Deletion of Integrated System Shop Testing (ISST) 0.00 CL 029 Executed 84 Additional Dowels at Maintenance Bldg. 914.00 FO 45 Executed 85 Replace Fuses at MCC 3A after PG&E power spike 1,706.00 Executed 86 Remove and replace disconnect switch @ Aerated Lagoon 2,919.00 FO 33 Executed 87 Lower Invert Elevation for 42" RSG Line 18,726.00 FO 32.001 Executed 88 Addition of Roof Hatch @ Main Electrical Bldg. 3,195.00 RFQ 62 Executed 89 Filter Support Bldg: NG Connections and Valving 1,361.00 RFQ 79 Executed 90 Chain Link Fence addition @ Farmhouse 725.00 FO 23 Executed 91 Repair Irrigation Lines @ Kaiser 1,186.00 FO 26 Executed 92 Demo of Spillway at Pond 10 12,109.00 FO 38 Executed 93 Curb and Grading @ Filter Support Bldg 0.00 FO 42 Executed 94 Irrigation System: Concrete Valve Boxes 2,393.00 RFQ 63 Executed 95 Contract time extension for Weather Days 11/06 0.00 5 Ltr 41 Executed 96 Mitigation Wetlands Drain 4,370.00 FO 41 Executed 97 Additional vinyl sheets for Levee Repair @ berm Pond 8 & 9 5,498.00 FO 52 Executed 98 Shoring @ Naval Trail 21,271.00 Executed 99 Extra excavation @ W Access Rd. for 12" 1W line 8,008.00 FO 28 Executed 100 Replace SBS line @ Chlorine Contact Basin 5,936.00 FO 51 Executed 101 Brush clearing @ Farm House 5,209.00 FO 27 Executed 102 Relocate standby Generator @ CCB 2,005.00 FO 50 Executed 103 Drywall Furring @ Elect Rm #2 in O&M Bldg. 1,630.00 RFQ 110 Executed 104 Equipment for MCC -3 retrofit 25,360.00 RFQ 50 Executed 105 Perimeter lighting switching @ Main Elec. Bldg. 1,795.00 RFI 520 Executed 106 Wiring for Time -Off Relay @ Wetlands Elec Bldg. 2,282.00 RFI 597 Executed 107 Changes to SCADA interface Boiler & PLC 3 3,549.00 RFQ 80 Executed 108 Disposal of existing MCC 3 transformer 2,141.00 RFQ 77 Executed 109 Contract time extension for Weather Days 12/06 0.00 7 Itr 53,54 Executed 110 Tree removal @ W Access Rd. 1,419.00 FO 48 Executed 111 Deepening Pull Boxes @ Ox Ditch MCC Bldg. 11,540.00 RFI 685 Executed 112 Rebar modification @ Wetlands Pump St Deck Beam 2,187.00 FO 49 Executed 113 Electrical Equipment Pads 9,018.00 RFQ 47 Executed 15 114 Delete Catch Basins at W Access Rd. 1,746.00 RFI 594 Executed I 115 Naval Bldg Lookout r ea 3,00 0.00 FO 47 Executed 116 Changes oTWE and PWE lines 0.00 RFQ 3,97 Executed 117 Polishing Wetlands FSS: Add Hand Switch 3,444.00 RFQ112 Executed 118 Engineering of Anchorage @ Oxidation Ditch Aerators (20,089.00) FO 44 Executed 119 Replace Oxygen Probes @ Aerated Lagoon/Pond 1 13,411.00 RFQ 115 Executed 120 Change Piping Material for Deionized Water Service 0.00 RFQ 7 Executed 121 Filter Support Bldg: Relocation of 1W Line 4,568.00 RFQ 101 Executed l 122 Security Lighting at Farmhouse 1,200.00 Executed 123 Disposal of Asbestos Containing Pipe 2,087.00 FO 31 Executed 124 Investigation and Disposal of FAA Building 20,512.00 FO 31 Executed 125 Conduit addition Boiler 126 O&M Bldg: Exhaust power supply & controls 34,440.00 RFQ 69 Executed 127 Addition of Disconnect Switches @ Headworks 25,143.00 RFQ 56 Executed 128 Level Transmitter addition @ Headworks 23,058.00 RFQ 52 Executed 129 Contract Time extension Weather Days 01-02/07 7 Executed 130 Subgrade Improve & Pipe Encasement @ W Access Rd. 12,128.00 FO 35 Executed 131 Additional Conduit for Fuel Leak Detection 2,714.00 RFI 586 Executed 132 HVAC Enclosure Modifications @ Ops Bldg. 8,014.00 RFQ 72 Executed 133 Wiring of Spare I/Os 45,713.00 RFQ 57 Executed 134 PLC Enclosure Size for PLC 5 7,823.00 RFQ 106 Executed 135 Partial Payment for PLC Enclosures 0.00 Executed 136 Trench Backfill with Native Material (72,000.00) RFQ 53 Executed 137 UV Bldg Top Slab Modifications 14,000.00 RFQ 104 Executed 138 Ops Bldg: HVAC Electrical & Mechanical Modifications 2,854.00 RFQ 102.1 Executed 139 24" Pumped Storm Drain Line Coverage 30,000.00 RFQ 109 Executed 140 Metal Siding @ Main Electrical Bldg. 5,071.00 CL 124 Executed 141 Contract Time Extension for Weather Days April 2007 1 Executed 142 Ops: Relocate HVAC duct transition @ Locker Rm Ceiling 878.00 FO 78 Executed 143 Use of Native Material for backfill @ North & Middle Cluster (77,690.00) Executed 144 Recycled Water Storage Basin Size Increase 220,867.00 RFQ 89.01 Executed 145 Outlet conduit replacement @ Existing CCB 1,260.00 FO 56 Executed 146 Modify Rebar Expansion Joints @ Thickener Bldg 1,610.00 FO 40.001 Executed 147 Modify Grating Seat @ Headworks Beam B-13 1,737.00 RFQ 125 Executed 148 Added Space Heater for PLC 8 - RIO 1 1,803.00 RFQ 137 Executed 149 Additional G2 Light Fixture @ Ops Bldg Lobby 2,013.00 RFI 756 Executed 150 Connection Grounding Bldg rebar @ MCC HW Bldg. 974.00 FO 80 Executed 151 Relocate supply line fire riser @ maintenance Bldg. 3,027.00 FO 36 Executed 152 Pipe material for 36" mixed liquor line @ 2ndary Clarifiers 14,271.00 RFQ 8 Executed [L1 153 Modifications HVAC Pads 9,562.00 RFQ 42 Executed I 154 Mod per PG&E Requiremnts to Main Power Supply 19,886.00 FO 18 Executed 155 Addition of Wall Sleeves at Thickener Building 847.00 CL 126 Executed 156 Reduce Deck b Openings Wetlands Pump Station 782.00 RFl 10 Executed 157 Wall Supports for ptL Pony Wall aLaboratory 2 162.00 RFQ100 Executed 158 Concrete Encase HCS pipeline @ Headworks Structure 2,393.00 RFQ 129 Executed 159 Convert Conference Rm into 2 Offices @ Ops Bldg. 8,351.00 RFQ 84 Executed 160 Concrete Backfill around Screw Press Equipment Trench 1,588.00 FO 71 Executed 161 Expansion Joint Rebar @ Headworks Grid Line 10 1,151.00 FO 64 Executed 162 Standby Generator Connection @ Wetlands PS 13,527.00 RFQ 135 Executed 163 Deletion of Rotameters @ Tertiary Filters (1,074.00) RFQ 118 Executed 164 Blockouts for Ox Ditch Aerator Anchorage 1,022.00 FO 67 Executed 165 Concrete Encase SO pipe under HWE pipeline @ HW 1,657.00 RFQ 126 Executed 166 Temporary Power for Transformer @ Aerated Lagoon 28,343.00 FO 34 Executed 167 Rebar @ Headworks Manual Bar Screen Embed 756.00 FO 57 Executed 168 Subgrade Improvement for Wetlands PS Apron Slab 11,799.00 FO 62 Executed 169 Screw Press Bldg Skylight Size Change 3,465.00 RFQ 140 Executed 170 ditional r Panel to PLC -9 2,887.00 CL 69 Executed 171 p@ eom xist g CCB duringower Standby pump work @ Pond 10 44,000.00 F022 Executed Executed 172 Billing for Potable Water Usage on site through 4/4/07 1,552.00 173 Upgrade starters for Ox Ditch Aerator Motors 78,373.00 RFQ 88 Executed 174 Blind flanges for future effluent line @ Aerated Lagoon 11,709.00 RFQ 24 Executed 175 Remove rebar @ Ox Ditch Aerator Motor Block-outs 3,000.00 FO 66 Executed 176 Modification of controls for Tertiary Effluent Bypass Valves (3,075.00) RFQ 29 Executed 177 Communication between PLC -8 & Thickener PLC 2,032.00 P RFI 37 Executed 178 Automated 1W Valve @ Recycled Water Storage Basin 46,267.00 RFQ 30 Executed 180 Relocate Fire Pump Can @ RWPS 4,613.00 FO 70 Executed 181 Add Effluent Conductivity Probe @ JB No. 2 9,680.00 RFQ 133 Executed 182 Revise DB Routing @ Ferrous Chloride Area 2,463.00 CL 54 Executed 183 Ventilation Alarms @ Boiler Bldg & Thickener Bldg 20,526.00 RFQ 127 Executed 184 Anti Graffiti Coating @ O&M Bldg and Sound Wall 28,736.00 RFQ 109 Executed 185 Deletion of Louvers @ HW Bar Screen Enclosures (1,374.00) RFQ 117 Executed 186 Deletion of Combination Smoke Fire Dampers (18,005.00) RFQ 83 Executed 187 Fire Rating Janitor Closet Door @ Ops 1,841.00 RFQ 138 Executed 188 Brush clearing @ Farm House fire season 2007 3,186.00 FO 90 Executed 189 Ops: alignment & wall cap (cD_ HVAC f e 8 26.00 FO 6 9.1 Executed 190 Ops: addition aco sti al ceiling @ electrical cal rm #1 3,125.00 RFQ 145 Executed 191 Ops: framing details for Lobby 2,163.00 FO 84 Executed 192 RWPS: modified floor drainage 15,107.00 RFQ 41.1 Executed 17 193 Ops: beam seats in CMU wall pockets 10,067.00 FO 46 Executed 194 Recycled Water Storage Basin Berm Modifications (2,595.00) RFQ 147 Executed 195 Double Containment System Modifications 90,172.00 RFQ 37 Executed 196 Site Security Lighting Estimation Cost 10,364.00 RFQ 145 Executed 197 Grading @ Mitigation Wetlands & RWSB 27,012.00 RFQ 161 Executed 198 PG&E power connection @ W Access Rd. 55,335.00 FO 37 Executed 199 UV Disinfection Light Pole Mounting Detail 7,027.00 RFQ 124 Executed 200 Ox Ditch Light Pole Mounting Detail 8,852.00 RFQ 134 Executed 202 Screw Press grating @ Flocculation Tank Opening 1,969.00 RFQ 94 Executed 203 Anchorage of Diffuser Pipe Ponds 9 & 10 32,659.00 FO 58 Executed 204 Acid Digester changed detail wall penetrations 4,286.00 RFI 645 Executed 205 Existing LPN panel in chemical bldg. 2,576.00 RFI 1031 Executed 206 Revised Details @ RWSB 20,881.00 RFQ 152 Executed 207 Ops: Deletion of Closet in Control Room (932.00) RFQ 150 Executed 208 Ultrasonic level sensor mount @ Headworks 1,208.00 CL 194 Executed 209 Mitigation Wetlands Drain — Permanent Installation 75,048.00 RFQ 153 Executed 210 Ops Bldg: Plumbing Dwgs 29,571.00 302 Executed 213 Ops: Furring Men's Restroom Urinal Wall 740.00 FO 102 Executed 214 Informational Kiosks: Addition of 2" PVC 40 Pipe Sleeve 2,560.00 FO 95 Executed 216 Below Grading Coatings 72,507.00 RFQ 61 Executed 217 Aerated Lagoon: Unknow utility @ 20" URW Alignment 5,225.00 FO 98 Executed 219 Silt Fence Repair 1,209.00 Executed 221 Ops Bldg: Modifying Welding Studs to 1/8" Tubing 5,293.00 CL 151/152 Executed 222 Pond 10 Apron Slab: Over Ex, Fabric, and Rock 3,870.00 FO 118 Executed 223 Addition of Solenoid Valve @ Recycled Water Surge Tank 5,095.00 RFQ 34 Executed 225 Relocate Receptacles @ Biofilter Mechanical Pad 3,286.00 RFI 874 Executed 226 Equipment Pad Modifications @ Screw Press 5,130.00 RFQ 130 Executed 227 Footing Elevation @ Filter Support Bldg. Tank Farm 2,098.00 FO 75 Executed 228 Relocation of Cell D Transfer Structure 5,162.00 RFI 1068 Executed 230 Farm House: Plywood Cover @ Back Entry 756.00 FO 72 Executed 231 Methane Digester construction joint location & piping 1,057.00 RFI 875 Executed CHANGE ORDER TOTAL: 2,121,311.00 67 Contract Amount: 110,329,000.00 1278 Percent Change Orders: 1.92% Totals: 112,450,311.00 1345 Total Additive Change Orders 2,916,539.00 Percentage of Contract Amount 2.64% 18 Total Credit Change Orders Percentage of Contract Amount (795,228.00) 0.72% Contract Substantial Completion Date 4/9/09 Current Substantial Completion Date 6/15/09 19 \. ( [ )} � \� \| no n ILI2 2 \) � \ \ \ | { 2 ] t \ ]/ }j� 15 !. _�! | ILI2 2 \) � �} 4: !°O±V , �� t \ ]/ }j� ILI2 2 15 !. ■» E» / } ; 5 §/ ! !iB / , .# ! 4«! t >./i! n e N 0 R n