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Home My WebLink AboutStaff Report 4.A 01/07/20081 PROJECT NUMBER C500402 L f�• 4.A January 7, 2008 CONSTRUCTION MANAGEMENT PROGRESS REPORT No. 26 November 2007 PARTICIPANTS Owner: City of Petaluma 11 English Street Petaluma, CA 94952 Contractor: Kiewet Pacific Co. 5000 Marsh Drive Concord, CA 94520 Design Engineer: Carollo Engineers 2700 Ygnacio Valley Rd, Suite 300 Walnut Creek, CA 94598 Environmental ESA Management: 8950 Cal Center Drive, Bldg 3, Suite 300 Sacramento, CA 95826 Programmer: ArcSine engineering 970 Executive Way Redding, CA 96002 Construction The Covello Group Manager: 1660 Olympic Blvd, Suite 300 Walnut Creek, CA 94596 2 Mike Ban Director (707) 778-4487 Margaret Orr Engineering Manager (707)778-4589 Charlie Gardner Project Manager (925)516-4600 Larry Koneck Project Engineer (707) 782-9826 Ext. 31 Tom Patten Principal (925)932-1710 Doug Wing Design Engineer (925)299-6733 Jim O'Toole Project Engineer (707)795-0900 Jennifer Garrison Enviroranental Manager (916)564-4500 Doug McHaney Project Manager (530) 222-7204 Steve Stewart Lead Progratmner (530) 222-7204 Bruce Presser Principal (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 .................................................. $ 2,493,341.00 Total Contract Cost ......................................................... $ 112,822,341.00 Contract Amount Earned ................................................... $ 88,327,835.00 Progress Payment for November 2007 (excludes retention)........... $ 3,499,483.00 Previous Progress Payments (excludes retention) ...................... $ 75,996,212.00 Estimated Percent Complete............................................................. 78% • Design Engineer: Carollo Engineers Authorized Budget (Total Project) ....................................... $ Billingsto Date............................................................... $ • Environmental Manager: ESA Authorized Budget (Total Project) ...................................... $ Billings to Date...............................................................$ r ArcSine engineering Authorized Budget (Total Project) ....................................... $ 4,354,075.00 3,421,875.53 1,434,830.00 791,366.12 2,340,951.00 Billings to Date...............................................................$ 1,453,407.06 • Construction Manager: The COVELLO GROUP, Inc. Authorized Budget (Total Project) ....................................... $ 10,231,509.00 Billings to Date............................................................... $ 5,084,019.72 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 ... 781 Days ........... 58% 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 12" 1W pipeline was installed at the main entrance and tied in to City water supply. Prior to the connection to the City system, the new pipeline was pressure tested and disinfected. • The 3" Pumped Drain lines were installed at the Headworks. • Excavation for the 6" Digested Sludge pipe began. Electrical Duetbanks The following ductbanks were placed and backfilled this month: • A ductbank west of Headworks was placed. This ductbank runs between the headworks the Headworks Motor Control Center. • The ductbank east of Headworks was placed. Oxidation Ditches Kiewit installed additional aerators at both Oxidation Ditches. Mass Electric continued to install exterior electrical items such as aerator motors and light posts. The roof deck for the Oxidation Ditch Motor Control Center building was placed and the interior falsework was removed. Secondary Clarifiers Kiewit continued to install the repaired sweep mechanisms in the clarifiers. Both walkways and associated safety railings have been installed; these walkways will provide maintenance access to the central drive motors. Return Activated Sludge (RAS) Structure Kiewit formed and poured the stair landing pad at the RAS structure and completed the pipe supports. Tertiary Pump Station (TPS) Kiewit installed various pumps and completed the pipe supports. Main Electrical Building Mass Electric continued to install devices within the structure. Workers continued to install metal studs to the exterior walls in preparation for the installation of exterior metal wall panels. The first wall panels were placed on the exterior of the building. These panels were necessary to make the building look like a farm building to reduce the visual impacts to the existing farmhouse. Headworks Facility Crews continued welding T -lock (a corrosion resistant layer) on the channel walls and roof of the Headworks. Perimeter handrail was placed on the roof deck and one flight of permanent stairs was placed. Headworks MCC Mass Electric continued installing the individual motor control centers and breakers within this MCC structure. The mechanical crew began installing ventilation ductwork in the building. Thickening Building Kiewit formed and poured the parapet walls at the roof of the Thickening Building. The raised curb for a roof ventilation structure was poured as well. Screw Press Building Crews continued installing falsework within the Screw Press Building. This will provide temporary support for the placement of the concrete roof deck. The falsework will be removed after the concrete roof slab cures to the proper strength. Methane Digester Installation of falsework for the dome of the digester continued. Work began on the exterior finish of the structure. The adjacent mechanical pad was funned and poured. This pad will be the platform for various pumps and motors used to transport the digested sludge. Acid Digester Rebar continued on the Acid Digester walls. Kiewit completed installation of the lower level wall penetrations and proceeded to form and pour the lower walls. This was the first of two pours for the walls. Operations and Maintenance Building Multiple subcontractors continued interior work in this building. The activities that continued throughout the month: installation of window glass, file within the bathrooms and locker rooms, painting the walls and structural steel, installing the ceiling grids, installing the laboratory equipment and cabinets, installing the copper parapet siding, installing bathroom fixtures. Several components of the green roof were installed this month. Tertiary Filter Filter wall and elevated slab erection continued throughout the 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 continued installation of ventilation ductwork inside the building. Pipe crews installed chemical pipe and supports within the building. Recycled Water Pump Station Pipe fitters continued 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 beginning 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 chlorine 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-four new change orders were processed in November. The sum of these change orders results in a net addition to the construction contract of $373,030.00. The complete list of contract changes is attached. Those executed in November and valued greater than $10,000 are as follows: Thickening Walls @ Ox Ditch Aerator Shafts 11,286.00 CCB: Relocation of Ammonia Tank 17,176.00 Tertiary Filter: 12 Inch Inlet Line 17,248.00 Headworks: Epoxy Coat Rebar @ Block-outs 20,579.00 Ops: Addition of Compressed Air @ Laboratory 22,641.00 Replace Farmhouse Roof 34,194.00 Potholing & Excavation existing utilities @ CCB 42,606.00 Electrical Modifications @ UV Bldg. 47,188.00 Modifications to the Potable Water System 105,856.00 4. Field Orders Ten new field orders were prepared this month. A total of one hundred thirty-one field orders have been prepared for the project. Of those, forty-five remain active with a total estimated value of $292,056. Active field orders greater than $10,000 areas follows: FO No. Description Amount 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: Addition 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 $10,000.00 117 Modify Solids Handling Slab $20,000.00 Active Field Orders < $10,000 $110,164.00 Total $292,056.00 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 for power and control to the Aerators and other electrical equipment. Work will continue on a number of structures used to route flow to and from the oxidation ditches and clarifiers including the Tertiary Pump Station, Secondary Effluent Junction Box, RAS Pump Station, Secondary Clarifier Flow Splitter, WAS Pump Station, and Oxidation Ditch Flow Splitter. Kiewit will backfill and grade around these structures in preparation for paving operations. 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 and Acid Digester. Work at the mechanical pads associated with these structures will continue as pumps and connected piping are installed. Kiewit will continue to grade and pave several areas around the site, mainly concentrating on areas where structural work is complete. Several subcontractor activities will continue within the Operations and Maintenance Buildings, these activities include: installing copper parapet siding, installing ceiling grids and panels, installation of green roof and planting, continue installing glazing components, installing lockers and toilet partitions. SUBMITTAL STATUS Total Cost of Total November Active Active Orders Field Orders Issued 131 10 45 $292,056.00 A I_.Z f] " 0 a R _ Total November Value of Change Orders Executed in November 34 $373.030.00 Value of Change Orders Executed to Date 256 $2,493,341.00 Percent to Date of Original Contract 2.26% WEATHER RELATED DELAYS Days Base Contract Allowance 40 Weather Related Days in October 0 Weather Related Days to Date 82 0 Received To Date November Returned Pending First Time Shop Drawing Submittals 806 11 803 3 Request for Information 1170 42 1163 7 C. M. Request for Information 182 7 174 8 Total Cost of Total November Active Active Orders Field Orders Issued 131 10 45 $292,056.00 A I_.Z f] " 0 a R _ Total November Value of Change Orders Executed in November 34 $373.030.00 Value of Change Orders Executed to Date 256 $2,493,341.00 Percent to Date of Original Contract 2.26% WEATHER RELATED DELAYS Days Base Contract Allowance 40 Weather Related Days in October 0 Weather Related Days to Date 82 0 Mass Electricians placed the light poles along the channel Mass Electricians placed the rigid conduit to the Motors, Hand Switches and Junction Boxes on the south half of the center deck of Oxidation Ditch No.1. 10 Air Layer, Water Retention Moisture Mat, Drainage Layer, filter Fabric and 3" Soil Layer. Operations Lobby entrance, sun shade, sidewalk and copper siding along the roof line. 11 Y I kfN Completed Recycled Water Storage Basin concrete slopes. Monterey Mechanical sheet Metal workers placed the exterior siding on the north wall of the Main Electrical Building. Hat Channel can be seen on the exterior east wall face. 12 Ellis Creek Water Recycling Facility CONTRACT CHANGE ORDER TRACIONG SHEET Description Time extension for additional soil sampling Lime treatment at Ox Ditch & Secondary Clarifiers Board up Farmhouse Hay Stacker Relocation Terrorism Insurance and Increased Earthwork Meter in Temporary Recycled Water Pipeline Temporary Power for Pond 1 Aerators Pavement Repair on Cypress and McDowell Conduit Encasement Coloring Agent Delayed Caltrans Encroachment Permit Trench Cut -Off Walls Horizontal Aerators Extended Warranty Testing Deletion of Prime Coat under AC Pavement Replace PVC Sched. 40 with EB 20 Conduit in DB Delete Lakeville Highway Access Contract Time Extension for Weather Days 03-04/06 Change Valve Types Replace EMT conduits by MC cable @ O&M Bldg Inverter Duty Motors at Oxidation Ditch Aerators Aerated Lagoon and Pond 1 Modifications Milestone Additional Striping and Loops on McDowell Catch Basins Invert Changes Oxidation Ditch Sump Modifications Change Buried Conduits PVC GRS to PVC Sch. 40 Temporary Power to Existing Aerators 4 and 7 O&M Bldg: Ceiling & Wall Heights Rms Provide Portable Generator Pads at Ponds FS Bldg: Extend Conduit Stub -ups Beyond Ductbank Headworks: Handrail Extension to Complete Deck Pond 4 Aerator Temp Power Aerated Lagoon: Reconnecting of Aerator No. 2 Unknown Utility at Pond 1 North Side Ductbank Encasement with Reinforcing Gun Safe for Storage of Bid Documents S&C Pad Mounted Switch Additions Permanent Power Supply for Pond 1 Aerators Temporary Fire Hose 13 Amount 0.00 125,000.00 3,385.00 493.00 0.00 3,023.00 1,270.00 419,681.00 (47,000.00) 16, 723.00 (18,600.00) 0.00 (29, 700.00) (21,774.00) 40,000.00 0.00 0.00 ('14,777.00) 16,466.00 0.00 13,747.00 (9,997,00) (7,750.00) (213,038.00) 7,956.00 4,287.00 2,554.00 9,190.00 1,254.00 883.00 537.00 855.00 24,884.00 2,410.00 75,200.00 98,000.00 851.00 Time I RFQ/FO FO 006 (Days) I NO. Status 8 Executed RFQ 011 Executed FO 004 Executed FO 002 Executed RFQ 001 Executed FO 006 Executed FO 007 Executed RFQ #21 Executed RFI 062 Executed FO 005 Executed RFI 057 Executed RFI 152 Executed RFI 084 Executed RFI 081 Executed RFQ 15 Executed 38 C to Cm Ltrs Executed RFQ 10 Executed RF1082 Executed CL 35 Executed Executed Executed RFQ13 Executed RFQ 02.002 Executed RFI 154 Executed FO 8 Executed RFQ 20 Executed FO 14 Executed RFQ26 Executed RFQ 27 Executed FO 10 Executed FO 11 Executed Executed RFQ 31 Executed FO 17 Executed RFQ 39 Executed RFQ 4 Executed FO 12 Executed 38 Change material for Temporary Debris Collector (36,150.00) RFI 061 Executed 39 Chemical Tank Pads @ 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 @ 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 75 Addition of waterstop in wall Cc? Filter Support Bldg. 1,330.00 RFQ 62 Executed 76 Delete waterstop & starter walls (cD 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 14 _ 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 114 Delete Catch Basins at W Access Rd. 1,746.00 RFI 594 Executed 115 Naval Bldg Lookout Area 3,000.00 FO 47 Executed 116 Changes to TWE and PWE lines 0.00 RFQ 73,97 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 15 i Executed 122 Security Lighting at Farmhouse 1,200.00 123 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 Bldg. 15,780.00 RFQ 87 Executed _ 126 O&M Bldg: Exhaust fans 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 Executed 131 Additional Conduit for Fuel Leak Detection 2,714.00 RFI 586 _ 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 Paymentfor 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 �1 138 Ops Bldg: HVAC Electrical & Mechanical Modifications 2,854.00 RFQ 102.1 Executed 1 139 24" Pumped Storm Drain Line Coverage 30,000.00 RFQ 109 Executed _ 140 Metal Siding @ Main Electrical Bldg. 5,071.00 CL 124 Executed _ Executed 141 Contract Time Extension for Weather Days April 2007 1 142 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 �1 151 Relocate supply line fire riser @ maintenance Bldg. 3,027.00 FO 36 Executed 1 152 Pipe material for 36" mixed liquor line @ 2ndary Clarifiers 14,271.00 RFQ 8 Executed 153 Modifications HVAC Pads 9,562.00 RFQ 42 Executed 154 Mod per PG&E Requirements 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 Slab Openings @ Wetlands Pump Station 782.00 RFI 610 Executed 157 Wall Supports for Pony Wall at Laboratory 2,162.00 RFQ 100 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 i 17 Blockouts for Ox Ditch Aerator Anchorage 1,022.00 FO 67 Executed 1 _164 Concrete Encase SD pipe under HWE pipeline @ HW 1,657.00 RFQ 126 Executed _165 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 Subgrade Improvement for Wetlands PS Apron Slab 11,799.00 FO 62 Executed _168 169 Screw Press Bldg Skylight Size Change 3,465.00 RFQ 140 Executed _ 170 Additional 1/0 from Power Panel to PLC -9 2,887.00 CL 169 Executed 171 Standby pump @ existing CCB during work @ Pond 10 44,000.00 FO 22 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 _ 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 30 179 Modification to HW Bar Screen Channels 6,130.00 RFQ 74 Executed _ 180 Relocate Fire Pump Can @ RWPS 4,613.00 FO 70 Executed _ 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 127 184 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: CMU alignment & wall cap @ HVAC enclosure 1,826.00 FO 69.1 Executed 190 Ops: addition acoustical ceiling @ electrical 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 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 201 Existing CCB: power to New Chemical Metering Pump 8,588.00 RFQ 105 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 1� 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 17 _ 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 Dwqs 29,571.00 302 Executed _ 211 Ops: Deletion of decking @ Mechanical Chases 1,719.00 FO 82 Executed 1 _ 212 Headworks: channel floor rebar modification 1,696.00 FO 59 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 _ 215 Screw Press: Modifications to Underslab Piping 2,607.00 RFQ 95 Executed _ 216 Below Grading Coatings 72,507.00 RFQ 61 Executed _ 217 Aerated Lagoon: Unknown utility @ 20" URW Alignment 5,225.00 FO 98 Executed _ 218 Ops Bldg: Additional Window Clips 3,194.00 FO 103 Executed 219 Silt Fence Repair 1,209.00 Executed _ _ 220 Ops Bldg: control rm. Backing & wood blocking 2,185.00 FO 101 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 224 Thickening Walls @ Ox Ditch Aerator Shafts 11,286.00 RFI _ 752 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 _ 229 Pipe Elevations & Drainage Swale @ Polishing Wetlands 1,938.00 CL 219 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 _ 232 Ops Bldg: Icemaker Legs 893.00 RFQ 169 Executed _ 233 Acid Digester: Overflow Piping Modifications 1,727.00 RFQ 78 Executed _ 234 West Cluster: Sitework & Grading Change 277.00 RFQ 166 Executed _ 235 Ops Bldg: Future access control conduit stub -outs 1,720.00 FO 89 Executed _ 236 Ops Bldg: Interior lights & furring strips 2,292.00 RFQ 114 Executed _ 237 Potholing & Excavation existing utilities @ CCB 42,606.00 FO 43 Executed _ 238 Replace Farmhouse Roof 34,194.00 RFQ 92 Executed _ 239 SCADA: TWAS sump level set points 1,682.00 RFQ 128 Executed _ 240 CCB: Relocation of Ammonia Tank 17,176.00 FO 83 Executed _ 241 Add wire way in PLC 6 @ Existing Chemical Storage Bldg. 1,775.00 RFI 1033 Executed 242 Replace Landscaping on Kaiser Property 2,690.00 Invoice 1003 Executed _ 243 Electrical Modifications @ UV Bldg. 47,188.00 RFQ 46 Executed _ 244 Headworks: Rebar Detail @ Channel Wall Ends 1,625.00 FO 65 Executed _ 245 Rebar @ Screw Press Bldg. Slab Extension 1,625.00 CL 204 Executed _ 246 Tertiary Filter: 12 Inch Inlet Line 17,248.00 FO 114 Executed _ 247 Ops: Modifications to Fume Hoods (490.00) RFQ 121 Executed 18 - 248 Ops: Addition of Compressed Air (@_ Laboratory 22,641.00 RFQ 136 Executed - 249 Ops: Training Room Modifications 8,494.00 RFQ 139 Executed - 250 Emergency Repair Kit Deletion (567.00) RFQ 141 Executed _ 251 Increase Cover Over 14 inch Foul Air Line 1,972.00 FO 120 Executed - 252 Headworks: Epoxy Coat Rebar (a) Block-outs 20,579.00 FO 60 Executed - 253 Relocation of Mezzanine Column (aD Screw Press 3,225.00 RFI 1016 Executed - 254 Additional Rebar @ Oxidation Ditch 1,348.00 FO 73 Executed - 255 Pipe Class Acid Gas & Methane Gas Pipe (5,089.00) Ur 147 Executed - 256 Modifications to the Potable Water System 105,856.00 FO 124 Executed _ CHANGE ORDER TOTAL: 2,493,341.00 67 _ Contract Amount: 110,329,000.00 1278 _ Percent Change Orders: 2.26% _ Totals: 112,822,341.00 1345 _ Total Additive Change Orders 3,294,715.00 Percentage of Contract Amount _ 2.99% _ Total Credit Change Orders (801,374.00) _ Percentage of Contract Amount 0.73% _ Contract Substantial Completion Date 4/9/09 _ Current Substantial Completion Date 6/15/09 19 in A Ng U- W 17 ar 20 3 u 5 O Ng U- W � -__ s_- ,-«\- - §�\ \� « , •-J ? m « � .a, a ;« \ \ d� \. � \ � \ � : [ `� : ;t � ' � I i � � � I �� I � � �I ' it I � �iI I i i �� I i i i I 1 I I ' I �1 � I � ' _ i i 1 '��i �� ! i � � � � � i �' i 1 i � I 'I � � I I �� I�� .. � j � ' 1 1 I � ' _ i i 1 '��i �� ! � I � ' i � I �� I � �� I ,i i � I I I' y' � � � r� �� i .I I: I � i N