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Staff Report 3.A 02/04/2008
PROJECT NUMBER C500402 G9 ��_ .185 CONSTRUCTION MANAGEMENT PROGRESS REPORT No. 27 December 2007 &A February 4, 2008 The ® Covello Group 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 Environmental Manager (916)564-4500 Doug McHaney Project Manager (530)222-7204 Steve Stewart Lead Programmer (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 .................................................. $ 2,719,539.00 Total Contract Cost ......................................................... $ 113,048,539.00 Contract Amount Earned ................................................... $ 91,726,937.00 Progress Payment for December 2007 (excludes retention)........... $ 3,059,192.00 Previous Progress Payments (excludes retention) ...................... $ 79,495,695.00 Estimated Percent Complete............................................................. 81 % • Design Engineer: Carollo Engineers Authorized Budget (Total Project) ....................................... $ 4,354,075.00 Billings to Date............................................................... $ 3,461,825.41 • Environmental Manager: ESA Authorized Budget (Total Project) ...................................... $ 1,434,830.00 Billings to Date...............................................................$ 813,756.12 • ArcSine engineering Authorized Budget (Total Project) ....................................... $ 2,340,951.00 Billings to Date...............................................................$ 1,497,401.59 • Construction Manager: The COVELLO GROUP, Inc. Authorized Budget (Total Project) ....................................... $ 10,231,509.00 Billings to Date...............................................................$ 5,326,489.15 3 Schedule Notice to Proceed ................ Base Contract Duration....... Original Completion Date... Time Extension Authorized Revised Duration ...... ............................October 10, 2005 .......... I.......... 1278 consecutive days .................................... April 9, 2009 ............................................. 67 days ..................... 1345 consecutive days Revised Completion Date........................................................................ June 15, 2009 Weather Days (included in base duration).......................................................... 40 days Weather Days Expended (included in time expended) ....................................... 82 days TimeExpended................................................................................................ 812 Days Percent Time Expended........................................................................................... 60% Al 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 and Electrical Ductbanks More than 95% of the underground piping and electrical ductbanks have been installed. Kiewit will continue to install the remainder of these elements over the next few months. 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. Several metal fabrications were installed in the Oxidation Ditches such as stairs, ladders, etc. Secondary Clarifiers Kiewit continued to install the repaired sweep mechanisms in the clarifiers. The mechanisms were torque tested to ensure the mechanisms were operationing per specification. Return Activated Sludge (RAS) Structure Kiewit began installing the small piping within the structure. Tertiary Pump Station (TPS) Kiewit began installing the small piping within the structure. Main Electrical Building The wall panel placement continued 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 as required by City of Petaluma SPARC. A sound wall will be constructed on the Lakeville Highway side of the Main Electrical Building. This sound wall will help block and deflect noise coming from the site. Kiewit began excavation for the sound wall's footing. Headworks Facility Kiewit stripped and cleaned miscellaneous areas within the Headworks Facility. Headworks MCC The mechanical crew finished installing ventilation ductwork within the building. Thickening Building Kiewit installed the membrane roofing on top of the building. Electrical conduit and control panels were installed as well as chemical piping within the building. Screw Press Building Kiewit constructed the roof deck forms and began to install the blockout forms for the skylights. Methane Digester Installation of falsework for the dome of the digester was completed and the deck was formed. A corrosion protection liner was place on these forms and will eventually protect the concrete from the corrosive gasses inside the Methane Digester. Acid Digester Rebar continued on the Acid Digester walls and deck. Kiewit completed installation of the upper level wall penetrations and proceeded to form and pour the upper walls. This was the second of two pours for the walls. Falsework will be place within the structure and the elevated concrete deck will be placed. Operations and Maintenance Building Multiple subcontractors continued interior work in this building. The activities that continued throughout the month: tile within the bathrooms and locker rooms, painting the walls and structural steel, installing the laboratory equipment and cabinets, installing the copper parapet siding, installing bathroom fixtures. Several components of the green roof were installed this month. The drop ceiling grid and the window glass activities have completed. Tertiary Filter Mewit continued to form and pour the interior channel walls within the structure. Only minor concrete work remains on 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. Painters began to coat the exterior "tank farm" with an anti- corrosive coating. This containment area is required to be coated due to the extremely corrosive nature of the stored chemicals. Recycled Water Pump Station Pipe fitters continued installing the above ground piping and valves. Wetlands Pump Station The structural work is nearly complete. This pump station is required to be operational in 2008. Wetlands Planting The wetland plants that were drill seeded in the polishing treatment wetlands are beginning to grow but will require some plugging. Some of the wetland plants that were plugged in Pond 9 and Pond 10 are doing well. Plantings that did not survive or failed to grow in pond 9 are being replaced with thousands of plugs per the original schedule in the Contract Documents. The seasonal wetland created as part of the project to mitigate wetland take was fine graded before the wet weather set in. Planting of this wetland adjacent to the parking area is scheduled to occur this winter. Planting continued along Ellis Creek as required by the permits for restoration. Debris was also removed from Ellis Creels as required by the permits. Outfall Area River discharge through the new JB2 began using the existing chemical dosing and monitoring facilities. Electrical and mechanical work continues on new facilities. Several unforeseen conditions presented themselves during the underground portion of this work. Building the JB2 structure was very difficult due to excess water in the excavations and many unknown existing pipelines, conduits, sheet piles, concrete blocks, etc. The joints just outside the structure were found to be separated causing additional engineering and construction costs. This structure could not be worked on until after the endangered Clapper Rail breeding season (September 1) and is essential for river discharge (begins on October 20), hence the timeframe for construction included around the clock operations at times, to complete the work within the allowable window of opportunity. River discharge started on December 1 instead of October 20 because of the construction challenges in the area. The available ponds (2 are under construction) were 96% full when discharge resumed. 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 Twenty-one new change orders were processed in December. The sum of these change orders results in a net addition to the construction contract of $226,198.00. The complete list of contract changes is attached. Those executed in December and valued greater than $10,000 are as follows: Additional Conduits & Wires Miscellaneous Areas Amphitheater seating next to Polishing Wetland Cell D Ferrous Chloride- revised electrical & pump pad Conduits for Future Mixer @ CC13 Headworks Deck Slab Falsework Dewatering of Pond 8 Irrigation Changes @ Point of Connection Changes & additions to 3W System @ Ox Ditches 4. Field Orders $41,620.00 $29,577.00 $24,522.00 $11,320.00 $26,026.00 $20,157.00 $24,050.00 $34,716.00 Eight new field orders were prepared this month. A total of one hundred thirty-nine field orders have been prepared for the project. Of those, forty-nine remain active with a total estimated value of $661,040. Four significant field orders were issued in support of the work at the outfall area. Active field orders greater than $10,000 are as follows: FO No. Description Amount 79 Ops. Bldq.: 1 -Hr. Fireoroofinq at Steel Beams $40,904.00 85 Ops. Bldq.: 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 $67,256.00 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 Alonq East Access Road $20,000.00 +� I 110 Handrail at Oxidation Ditch 1 and 2 North Bullnose $10,000.00 111 Handrail Post Pockets at Headworks $25,000.00 113 HVAC Modifications at Filter Support, Thickener & Screw Press $10,000.00 115 CCB: Weldinq Connections for 42" Pipe $14,525.00 117 Modify Solids Handlinq Slab $20,000.00 121 Ellis Creek Cleanup Debris Disposal $10,000.00 125 Issues Reqardinq JB2 Area $125,233.00 126 Issues Reqardinq CCB Area $74,639.00 134 CCB Washdown System $50,000.00 +� I 135 Modifications for Analvzer Enclosure at the Outfall Structure $20,000.00 Active Field Orders <$10,000 $101,591.00 Total $661,040.001 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. Mechanical crews will continue installing equipment at the Headworks which may include the placement of the bar screen 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. Several subcontractor activities will continue within the Operations and Maintenance Buildings, these activities include: installing copper parapet siding, installation of green roof and planting, installing lockers and toilet partitions. Start up of the new Outfall Area equipment and facilities will begin. System wide shutdown is required to fully test the new equipment and controls prior to discharge through the new equipment. The testing will begin if the weather and existing pond levels allow. SUBMITTAL STATUS FIELD ORDERS Total Cost of Total December Active Active Orders Field Orders Issued 139 8 49 $661,040.00 Total December Value of Change Orders Executed in December 21 $226,198.00 Value of Change Orders Executed to Date 277 $2,719,539.00 Percent to Date of Original Contract 2.46% WEATHER RELATED DELAYS Days Base Contract Allowance 40 Weather Related Days in December 0 Weather Related Days to Date 82 .0 Received To Date December Returned Pending First Time Shop Drawing Submittals 814 8 810 4 Request for Information 1191 21 1185 6 C. M. Request for Information 187 5 179 8 FIELD ORDERS Total Cost of Total December Active Active Orders Field Orders Issued 139 8 49 $661,040.00 Total December Value of Change Orders Executed in December 21 $226,198.00 Value of Change Orders Executed to Date 277 $2,719,539.00 Percent to Date of Original Contract 2.46% WEATHER RELATED DELAYS Days Base Contract Allowance 40 Weather Related Days in December 0 Weather Related Days to Date 82 .0 Mass Electric placed the lights, Polymer Blenders and electrical conduit in the Gravity Belt Thickener Room. 10 Oxidation Ditch No.1 with Installed hand rail, light posts, electrical conduit and junction boxes, concrete decks and nine of the sixteen aeration shafts with paddles. 12 Ellis Creek Water Recycling Facility CONTRACT CHANGE ORDER TRACKING SHEET 13 Time CCO # Description Amount (Days) 1 Time extension for additional soil sampling 0.00 8 2 Lime treatment at Ox Ditch & Secondary Clarifiers 125,000.00 3 Board up Farmhouse 3,385.00 4 Hay Stacker Relocation 493.00 5 Terrorism Insurance and Increased Earthwork 0.00 6 Meter in Temporary Recycled Water Pipeline 3,023.00 7 Temporary Power for Pond 1 Aerators 1,270.00 8 Pavement Repair on Cypress and McDowell 419,681.00 9 Conduit Encasement Coloring Agent (47,000.00) 10 Delayed Caltrans Encroachment Permit 16,723.00 11 Trench Cut -Off Walls (16,600.00) 12 Horizontal Aerators Extended Warranty Testing 0.00 13 Deletion of Prime Coat under AC Pavement (29,700.00) 14 Replace PVC Schad. 40 with EB 20 Conduit in DB (21,774.00) 15 Delete Lakeville Highway Access 40,000.00 16 Contract Time Extension for Weather Days 03-04/06 0.00 38 17 Change Valve Types 0.00 18 Replace EMT conduits by MC cable Q O&M Bldg (14,777.00) 19 Inverter Duty Motors at Oxidation Ditch Aerators 16,466.00 20 Aerated Lagoon and Pond 1 Modifications Milestone 0.00 21 Additional Striping and Loops on McDowell 13,747.00 22 Catch Basins Invert Changes (9,997.00) 23 Oxidation Ditch Sump Modifications (7,750.00) 24 Change Buried Conduits PVC GRS to PVC Sch. 40 (213,038.00) 25 Temporary Power to Existing Aerators 4 and 7 7,956.00 26 O&M Bldg: Ceiling & Wall Heights Rms 4,287.00 27 Provide Portable Generator Pads at Ponds 2,554.00 28 FS Bldg: Extend Conduit Stub -ups Beyond Ductbank 9,190.00 29 Headworks: Handrail Extension to Complete Deck 1,254.00 30 Pond 4 Aerator Temp Power 883.00 31 Aerated Lagoon: Reconnecting of Aerator No. 2 537.00 32 Unknown Utility at Pond 1 North Side 855.00 33 Ductbank Encasement with Reinforcing 24,884.00 34 Gun Safe for Storage of Bid Documents 2,410.00 35 S&C Pad Mounted Switch Additions 75,200.00 36 Permanent Power Supply for Pond 1 Aerators 98,000.00 13 14 Time CCO # Description Amount (Days) 37 Temporary Fire Hose 851.00 38 Change material for Temporary Debris Collector (36,150.00) 39 Chemical Tank Pads @ Filter Support Bldg 4,425.00 40 Disconnect Aerator No. 2 & reconnect Pond 4 Aerators 607.00 41 Delete Steel Steps in Manholes (19,012.00) 42 Add 4" Butterfly Valve in Acid Digester 1,189.00 43 Delete Pre -Action Fire System @ Main Elect. Bldg (19,242.00) 44 Headworks Influent Box Modifications 3,000.00 45 Transformer Pad at Restroom 9,498.00 46 Addition of Construction Joint at Oxidation Ditch Slabs 23,505.00 47 Change Conduits from PVC Rigid Steel to PVC Sch. 40 (21,912.00) 48 Reader Board & Geogrid placement @ Cypress/McDowell 6,000.00 49 Plant Control System PLC Architecture (6,118.00) 50 Grit Pump Room Sump Pump Modification 1,326.00 51 PLC Enclosure Size for PLCs 2, 3 and 8 5,446.00 52 Additional Time Switches at O&M Bldg. 2,722.00 53 Extension for Pond 1 Aerators Milestone Date 0.00 54 Levee Repair at Berm Existing Ponds 8 & 9 289,279.00 55 Operations Bldg. Maintenance Window 1,022.00 56 In -Plant Pump Station Wall Penetration Details 2,807.00 57 Alignment of 42" RSG line to Headworks 4,208.00 58 Revision of Structural Joints at Headworks Facilitv 5,628.00 59 Pond 9 & 10 Levee Pothole 1,400.00 60 Add pipe for Future Pump Can @ RW PS 6,316.00 61 Home Inspection of Farm House 746.00 62 Alignment of 42" PW E line to Cell D Transfer Structure 8,171.00 63 Delete Locks on Motor Operated Overhead Coiling Doors (383.00) 64 Dewatering of Pond 8 and Mitigated Wetland 3,488.00 65 UV System Programming 2,777.00 66 Septic Tank Removal at Farm House 739.00 67 Changes to Slide and Sluice Gates 11,177.00 68 PLC System Material for C Street Pump Station 14,915.00 69 PLC - 10 Analog Input Module 1,873.00 70 Change Storm Drain Pipe from RCP to CHDPE (72,398.00) 71 Deletion of CMU Coating on non -occupied structures (2,538.00) 72 Existing Utilities at West Access Road Entrance 8,543.00 73 Change Handrail for Polishing Wetlands Structures 6,965.00 74 Change SDR for HDPE Pipe Lines (52,415.00) 75 Addition of waterstop in wall @ Filter Support Bldg. 1,330.00 76 Delete waterstop & starter walls @ HW, RAS PS, UV (4,206.00) 77 Re -Power Pond Aerators, Reconnect Aerated Lagoon 3,718.00 14 Time CCO # Description Amount (Days) 78 Contract Time extension for Weather Days 10/2006 0.00 1 79 Deletion of waterstop and starter walls at Tertiary Filters (1.384.00) 80 Add waterston at Grit Pump Area of Headworks Structure 6,167.00 81 Fuel Tank Removal at Farmhouse 2,972.00 82 Revised Anchorage for Oxidation Ditch Aerators 40,941.00 83 Deletion of Integrated SVstem Shop Testing (ISST) 0.00 84 Additional Dowels at Maintenance Bldg. 914.00 85 Replace Fuses at MCC 3A after PG&E power spike 1,706.00 86 Remove and replace disconnect switch @ Aerated Lagoon 2,919.00 87 Lower Invert Elevation for 42" RSG Line 18,726.00 BB Addition of Roof Hatch @ Main Electrical Bldg. 3,195.00 89 Filter Support Bldg: NG Connections and Valvinq 1,361.00 90 Chain Link Fence addition @ Farmhouse 725.00 91 Repair Irrigation Lines @ Kaiser 1,186.00 92 Demo of Spillway at Pond 10 12,109.00 93 Curb and Grading @ Filter Support Bldg 0.00 94 Irrigation System: Concrete Valve Boxes 2,393.00 95 Contract time extension for Weather Days 11/06 0.00 5 96 Mitiqation Wetlands Drain 4,370.00 97 Additional vinyl sheets for Levee Repair @ berm Pond 8 & 9 5,498.00 98 Shoring @ Naval Trail 21,271.00 99 Extra excavation @ W Access Rd. for 12" 1W line 8,008.00 100 Replace SBS line @ Chlorine Contact Basin 5,936.00 101 Brush clearing @ Farm House 5,209.00 102 Relocate standby Generator @ CCB 2,005.00 103 Drywall Furring @ Elect Rm #2 in O&M Bldg. 1,630.00 104 Equipment for MCC -3 retrofit 25,360.00 105 Perimeter lighting switching @ Main Elec. Bldg. 1,795.00 106 Wiring for Time -Off RelaV @ Wetlands Elec Bldg. 2,282.00 107 Changes to SCADA interface Boiler & PLC 3 3,549.00 108 Disposal of existing MCC 3 transformer 2,141.00 109 Contract time extension for Weather Days 12/06 0.00 7 110 Tree removal @ W Access Rd. 1,419.00 111 Deepening Pull Boxes @ Ox Ditch MCC Bldg. 11,540.00 112 Rebar modification @ Wetlands Pump St Deck Beam 2,187.00 113 Electrical Equipment Pads 9,018.00 114 Delete Catch Basins at W Access Rd. 1,746.00 115 Naval Bldg Lookout Area 3,000.00 116 Changes to TWE and PW E lines 0.00 117 Polishing Wetlands FSS: Add Hand Switch 3,444.00 118 Engineering of Anchorage @ Oxidation Ditch Aerators (20,089.00) 15 Time cc0 # Description Amount (Days) 119 Replace Oxvqen Probes @ Aerated Laqoon/Pond 1 13,411.00 120 Chanqe Pipinq Material for Deionized Water Service 0.00 121 Filter Support Bldq: Relocation of 1W Line 4,568.00 122 Security Liqhtinq at Farmhouse 1,200.00 123 Disposal of Asbestos Containinq Pipe 2,087.00 124 Investiqation and Disposal of FAA Buildinq 20,512.00 125 Conduit addition @ Boiler Bldq. 15,780.00 126 O&M Bldq: Exhaust fans power supply & controls 34,440.00 127 Addition of Disconnect Switches @ Headworks 25,143.00 128 Level Transmitter addition @ Headworks 23,058.00 129 Contract Time extension Weather DaVs 01-02/07 7 130 Subqrade Improve & Pipe Encasement @ W Access Rd. 12,128.00 131 Additional Conduit for Fuel Leak Detection 2,714.00 132 HVAC Enclosure Modifications @ Ops Bldq. 8,014.00 133 Wirinq of Spare I/Os 45,713.00 134 PLC Enclosure Size for PLC 5 7,823.00 135 Partial Payment for PLC Enclosures 0.00 136 Trench Backfill with Native Material (72,000.00) 137 UV Bldq Top Slab Modifications 14,000.00 138 Ops Bldq: HVAC Electrical & Mechanical Modifications 2,854.00 139 24" Pumped Storm Drain Line Coveraqe 30,000.00 140 Metal Sidinq @ Main Electrical Bldq. 5,071.00 141 Contract Time Extension for Weather Days April 2007 1 142 Ops: Relocate HVAC duct transition @ Locker Rm Ceilinq 878.00 143 Use of Native Material for backfill @ North & Middle Cluster (77,690.00) 144 Recycled Water Storaqe Basin Size Increase 220,867.00 145 Outlet conduit replacement @ Existinq CCB 1,260.00 146 Modify Rebar Expansion Joints @ Thickener Bldq 1,610.00 147 Modify Grating Seat @ Headworks Beam B-13 1,737.00 14B Added Space Heater for PLC B - RIO 1 1,803.00 149 Additional G2 Liqht Fixture @ Ops Bldq Lobby 2,013.00 150 Connection Groundinq Bldq rebar @ MCC HW Bldq. 974.00 151 Relocate supply line fire riser @ maintenance Bldq. 3,027.00 152 Pipe material for 36" mixed liquor line @ 2ndarV Clarifiers 14,271.00 153 Modifications HVAC Pads 9,562.00 154 Mod per PG&E Requiremnts to Main Power Supply 19,886.00 155 Addition of Wall Sleeves at Thickener Buildinq 847.00 156 Reduce Deck SlabPump Station 782.00 157 Wall Supports s or Pony Walltatt Laborary 2,162.00 158 Concrete Encase HCS pipeline @ Headworks Structure 2,393.00 159 Convert Conference Rm into 2 Offices @ Ops Bldq. 8,351.00 16 17 Time CCO # Description Amount (Days) 160 Concrete Backfill around Screw Press Equipment Trench 1,588.00 161 Expansion Joint Rebar @ Headworks Grid Line 10 1,151.00 162 Standby Generator Connection @ Wetlands PS 13,527.00 163 Deletion of Rotameters @ Tertiary Filters (1,074.00) 164 Blockouts for Ox Ditch Aerator Anchorage 1,022.00 165 Concrete Encase SD pipe under HWE pipeline @ HW 1,657.00 166 Temporary Power for Transformer @ Aerated Lagoon 28,343.00 167 Rebar @ Headworks Manual Bar Screen Embed 756.00 168 Subqrade Improvement for Wetlands PS Apron Slab 11,799.00 169 Screw Press Bldg Skylight Size Change 3,465.00 170 Additional 1/0 from Power Panel to PLC -9 2,887.00 171 Standby pump @ existing CCB during work @ Pond 10 44,000.00 172 Billing for Potable Water Usage on site through 4/4/07 1,552.00 173 Upgrade starters for Ox Ditch Aerator Motors 78,373.00 174 Blind flanges for future effluent line @ Aerated Lagoon 11,709.00 175 Remove rebar @ Ox Ditch Aerator Motor Block-outs 3,000.00 176 Modification of controls for Tertiary Effluent Bypass Valves (3,075.00) 177 Communication between PLC -8 & Thickener PLC 2,032.00 178 Automated 1 W Valve @ Recycled Water Storage Basin 46,267.00 179 Modification to HW Bar Screen Channels 6,130.00 180 Relocate Fire Pump Can @ RWPS 4,613.00 181 Add Effluent Conductivity Probe @ JB No. 2 9,680.00 182 Revise DB Routing @ Ferrous Chloride Area 2,463.00 183 Ventilation Alarms @ Boiler Bldg & Thickener Bldg 20,526.00 184 Anti Graffiti Coating @ O&M Bldg and Sound Wall 28,736.00 185 Deletion of Louvers @ HW Bar Screen Enclosures (1,374.00) 186 Deletion of Combination Smoke Fire Dampers (18,005.00) 187 Fire Rating Janitor Closet Door @ Ops 1,841.00 188 Brush clearing @ Farm House fire season 2007 3,186.00 189 Ops: CMU alignment & wall cap @ HVAC enclosure 1,826.00 190 Ops: addition acoustical ceiling @ electrical rm #1 3,125.00 191 Ops: framing details for Lobby 2,163.00 192 RWPS: modified floor drainage 15,107.00 193 Ops: beam seats in CMU wall pockets 10,067.00 194 Recycled Water Storage Basin Berm Modifications (2,595.00) 195 Double Containment System Modifications 90,172.00 196 Site Security Lighting Estimation Cost 10,364.00 197 Grading @ Mitigation Wetlands & RWSB 27,012.00 198 PG&E power connection @ W Access Rd. 55,335.00 199 UV Disinfection Light Pole Mounting Detail 7,027.00 200 Ox Ditch Light Pole Mounting Detail 8,852.00 17 18 Time CCO # Description Amount (Days) 201 Existing CCB: power to New Chemical Metering Pump 8,588.00 202 Screw Press grating @ Flocculation Tank Opening 1,969.00 203 Anchorage of Diffuser Pipe Ponds 9 & 10 32,659.00 204 Acid Digester changed detail wall penetrations 4,286.00 205 Existing LPN panel in chemical bldg. 2,576.00 I 206 Revised Details @ RWSB 20,881.00 207 Ops: Deletion of Closet in Control Room (932.00) 208 Ultrasonic level sensor mount @ Headworks 1,208.00 209 Mitigation Wetlands Drain - Permanent Installation 75,048.00 210 Ops Bldg: Plumbing Dwqs 29,571.00 211 Ops: Deletion of decking @ Mechanical Chases 1,719.00 212 Headworks: channel floor rebar modification 1,696.00 213 Ops: Furring Men's Restroom Urinal Wall 740.00 214 Informational Kiosks: Addition of 2" PVC 40 Pipe Sleeve 2,560.00 215 Screw Press: Modifications to Underslab Piping 2,607.00 216 Below Grading Coatings 72,507.00 217 Aerated Lagoon: Unknow utilitV @ 20" URW Alignment 5,225.00 218 Ops Bldg: Additional Window Clips 3,194.00 219 Silt Fence Repair 1,209.00 0 Ops Bldg: control rm. blocking " 221 q Studs to 1/8 Tubing Ops Bldg: Modifying Welding 5,293.00 222 Pond 10 Apron Slab: Over Ex, Fabric, and Rock 3,870.00 223 Addition of Solenoid Valve @ Recycled Water Surqe Tank 5,095.00 224 Thickening Walls @ Ox Ditch Aerator Shafts 11,286.00 225 Relocate Receptacles @ Biofilter Mechanical Pad 3,286.00 226 Equipment Pad Modifications @ Screw Press 5,130.00 227 Footing Elevation @ Filter Support Bldg. Tank Farm 2,098.00 I 228 Relocation of Cell D Transfer Structure 5,162.00 229 Pipe Elevations & Drainage Swale @ Polishing Wetlands 1,936.00 230 Farm House: Plywood Cover @ Back Entry 756.00 231 Methane Digester construction joint location & piping 1,057.00 232 Ops Bldg: Icemaker Legs 893.00 233 Acid Digester: Overflow Piping Modifications 1,727.00 234 West Cluster: Sitework & Grading Change 277.00 235 Ops Bldg: Future access control conduit stub -outs 1,720.00 236 Ops Bldg: Interior lights & furring strips 2,292.00 237 Potholinq & Excavation existing utilities @ CCB 42,606.00 236 Replace Farmhouse Roof 34,194.00 239 SCADA: TWAS sump level set points 1,682.00 240 CCB: Relocation of Ammonia Tank 17,176.00 241 Add wire way in PLC 6 @ Existing Chemical Storage Bldg. 1,775.00 18 Time CCO # Description Amount (Days) 242 Replace Landscaping on Kaiser Property 2,690.00 243 Electrical Modifications @ UV Bldg. 47,188.00 244 Headworks: Rebar Detail @ Channel Wall Ends 1,625.00 245 Rebar @ Screw Press Bldg. Slab Extension 1,625.00 246 Tertiary Filter: 12 Inch Inlet Line 17,248.00 1 I 247 Ops: Modifications to Fume Hoods (490.00) 248 Ops: Addition of Compressed Air @ Laboratory 22,641.00 249 Ops: Training Room Modifications 8,494.00 250 Emergency Repair Kit Deletion (567.00) 251 Increase Cover Over 14 inch Foul Air Line 1,972.00 252 Headworks: Epoxy Coat Rebar @ Block-outs 20,579.00 253 Relocation of Mezzanine Column @ Screw Press 3,225.00 254 Additional Rebar @ Oxidation Ditch 1,348.00 255 Pipe Class Acid Gas & Methane Gas Pipe (5,089.00) 256 Modifications to the Potable Water System 105,856.00 257 Thickening Bldg piping modifications 764.00 j 258 Catch Basin grating modification @ W Access Rd. culvert 4,950.00 259 Headworks FRP grating support @ Gate location 2,219.00 260 Digested Sludge Storage Tank: Piping Modifications 4,828.00 261 Modifications to Analyzer Enclosures 9,315.00 262 Additional Conduits & Wires Miscellaneous Areas 41,620.00 263 Planting modification @ West Access Rd. 2,328.00 264 Install Clapper Rail Trail Gate 2,687.00 265 Amphitheater seating next to Polishing Wetland Cell D 29,577.00 266 Ferrous Chloride- revisedpump pad 2 4,552.00 267 Chip Down ofWall@ Filter Support 268 Conduits for Future Mixer @ CCB 11,320.00 269 Modifications for Interfacing between PLC 6 and PLC 11 5,800.00 270 Headworks Deck Slab Falsework 26,026.00 271 Dewaterinq of Pond 8 20,157.00 272 Pressure Gauges @ Wetlands Pump Station 4,110.00 273 Irrigation Changes @ Point of Connection 24,050.00 274 Filter Support: 4" chemical drain elevation 872.00 275 Unknown Utilities @ Site Entrance 4,205.00 276 Mitigated Wetland lanting 31,309.00) (s 277 Changes & additions to 3W System @ Ox Ditches 34,716 00 CHANGE ORDER TOTAL: 2,719,539.00 67 Contract Amount: 110,329,000.00 1278 Percent Change Orders: 2.46% Totals: 113,048,539.00 1345 19 Total Additive Change Orders 3,552,222.00 Percentage of Contract Amount 3.22% Total Credit Change Orders (832,683.00) Percentage of Contract Amount 0.75% Contract Substantial Completion Date 4/9/09 Current Substantial Completion Date 6/15/09 20 M §• 11 OF A a i ! \]i g: � — ! ,.;.o ; ■ > a�« 7 ± I =�4 7 — � \ \ ° @ ; , § ■ ■ E £ © ■ | , ■ � | / § ).\ � # | ) . ■ ; § | § § § { | § § \ E |1545, § § ) § | § § § � ■ § § E ! r n# r, ®) �� � �ƒ § � , ( �., ,r ƒ � \ _)_ ° � ƒ \ ƒ { { / � � � { k �_ ` t \ ; \ £ �! � ; � { � � � \��� \� �� �� \i� `\= ) i i : i � � � � � . . »; � . � � . �) � - , ' ; � ; � � \ | � > � . � �[ . � :� . . � . � � i .|� ' i . 2} [ � � ; � � ' � \ � � � _ _ , � � � � � � � �`� :[� : ; � ; � ) . � � � � . . ; I ; . � \ ' � � ; � i � i , . . i ; . \} � � � � � � � � �, � �� � � \ \ � � � � � \ i . ., �� � � , } ! § , . m » ; / } ;�\ § z / / , \_� y I — ± \ f 7 a ■ , m , p ; ; " _� , a — — — - � —�— � \ \ \ \ k t | \ \ \ k / |, / k §`/ | ` � � � � \ | � � ƒ \ � § k \ \ / \ \ | | � . $.§ §.§�ƒ § ; §_) & § 2 § ! § § ; § }! e, ®�§ §#& e t r y§ B y t y;; $� ■ @ # i a ! ■ r � ■ n # # # ! 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