Construction Progress Report - cmsa.us · Executive Summary Contract Number 07-01 General Contractor Western Water Constructors Contract Bid Amount $35,550,000.00 Change Orders to

Construction Progress Report May 2009

Wet Weather Improvements Project Central Marin Sanitation Agency

Table of Contents

Section 1 WWIP Executive Summary

Section 2 WWIP Project Photos

Section 3 Logs

Executive Summary

Contract Number 07-01

General Contractor Western Water Constructors

Contract Bid Amount $35,550,000.00

Change Orders to Date 12, plus two Extra Work Orders

Pending/Anticipated Change orders 4 items

Notice to Proceed October 8, 2007

Original Contract Time 910 calendar days

Working Days Elapsed 602

Working Days Remaining 308

Milestone 1 (CCT & EPS) July 29, 2009

Milestone 2 (All other work) March 6, 2010

Rain days – Accepted to date 8 of 50 included within contract time

Contract Change Order(s) Time Extension 0

Contract Completion Date April 5, 2010

Total Project Time Expended 66.0%

Total Project Cost Expended 69.8% Work Progress during May 2009 by Area or System: 1. General:

Western Water has begun planning for testing, training and start up of the Chlorine Contact Tank and Effluent Pump Station Systems. Western Water has provided a detailed testing and start-up schedule for this work, which will be reviewed at the next start-up meeting planned for early June. Operations and Maintenance manuals are being submitted and reviewed; testing and start-up plans are expected in June. Western Water (WW) maintained the SWPPP best management practices (BMPs) for wet weather. No rain days were incurred in May. Western Water continues routine weekly safety tailgate meetings, weekly safety checks, as well as the monthly safety audit performed by WW’s safety officer. Written reports of all meetings, checks and safety audits have been submitted for the record.

2. Polymer Facility: Western Water performed no work at the polymer facility during the month of May. They received the two polymer activation units, which will be installed in June. They are awaiting the Agency’s decision regarding the proposed repair of the polymer tank.

3. Gallery A & B Improvements, including Grit Chamber 3 and Headworks The shoring was removed from Gallery A extension. Western Water’s next efforts in this area are to complete sacking and patching of all interior walls, followed by mechanical work.

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4. Primary Clarifiers 6 & 7 Western Water completed concrete placement of three slab sections for Primary Clarifier Tank No. 07 and the two short stairs between the roof over Gallery A extension and the Primary Clarifier deck. Western Water also installed the four sluice gates and two slide gates. Western Water installed the exposed 3W piping within Tank 6 and part of Tank 7. They also cut into the existing blending channel in preparation to connect the new blending channel to the existing. The next major efforts will concentrate on the completion of Tank No. 07 and the effluent and blending channels.

5. Chlorine Contact Tanks (CCT) 5 & 6 Western Water completed concrete placement of the stairs on the west side of the Chlorine Contact Tanks. Western Water continued work on minor mechanical work within the new Chlorine Contact Tanks, including the installation of the washdown monitors and pipe extensions on the 16-inch 3W line within each of the new tanks. Subcontractor, Aspen Timco, pulled wire and installed light standards (15 total) throughout the Chlorine Contact Tanks. Subcontractor, Hansen Painting, began painting the piping throughout the Chlorine Contact Tanks, including the 16-inch 3W line along the existing Chlorine Contact Tanks.

6. Effluent Pump Station (EPS) Western Water completed concrete placement of the exterior building stairs and stair parapet walls. They also completed interior sack and patch work. The roof was primed for installation of the bituminous roofing system. Western Water extended the equipment curbs approximately two feet to allow for the depth of the roofing material. After a delay due to testing personnel availability, the five vertical propeller pumps were successfully tested in the presence of witnesses from the Agency, Carollo Engineers and Harris & Associates. The pumps are expected to be delivered to the site the first week of June. Subcontractor, Aspen Timco continued installation of interior electrical conduits and installed the motor control centers and local lighting panels within the Effluent Pump Station equipment room. They also pulled wire and installed the interior and exterior light fixtures. Subcontractor, Allied Fire Protection has nearly completed installation of the fire sprinkler lines.

7. Site improvements No significant site work was performed in the month of May. In June, subcontractor, CATS 4 U will return to perform finish grading work around the Chlorine Contact Tanks. Western Water will then install the cross gutters to guide water flow into the new catch basins.

8. Aeration Tanks The electrical subcontractor, Aspen Timco, will submit a proposed conduit routing plan with details for the Agency’s review. The conduits are for the new sluice gate motor operators.

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9. Review Item Summary Please see attached open RFI and Submittal logs in Section 3 for details of the following outstanding items.

Review Items Total Received to Date

Number Received in

May

Number Returned / Reviewed in May

RFIs 154 7 7 Submittals 283 8 2 Certified Payroll 496 33 33

10. Change Order Summary

Approved Change Orders

Description Cost

Contract Change Order No. 001 One-time relocation of PG&E gas Line $0.00

Contract Change Order No. 002 Miscellaneous Small Changes (9 items) $1,043.00

Contract Change Order No. 003 Miscellaneous Changes (8 items) $40,403

Contract Change Order No. 004

Secant pile retaining wall additional work over Ross Valley Interceptor per Design Clarification No. 002, performed on $54,228

Contract Change Order No. 005 Miscellaneous Changes (11 items) $11,249.00

Contract Change Order No. 006 Small Changes (7 items) $22,182.00

Contract Change Order No. 007 Procure and install 5th effluent pump assembly Not to exceed

$580,000.00Contract Change Order No. 008 Six (6) Construction issues $49,165.00

Contract Change Order No. 009 Seven (7) Issues, Including CLSM Value Engineering -50,734.00

Contract Change Order No. 010 Five (5) Issues, including Ross Valley Interceptor Bridge $74,283.00

Contract Change Order No. 011

Exposed SBS Line Installation and three issues for Core Drilling at Existing CCT $0.00

Contract Change Order No. 012 Four (4) Construction Issues $21,076.00

Total $802,895.00 Extra Work

Orders Description Cost

EWO No. 01 Furnish and install two new Headworks Screens $1,343,316.00

EWO No. 02 Deck Coating and Expansion Joint Repair $103,961.00

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Pending Change Orders

Description Action

Issue #113 Gallery A Stairwell Lights Pending negotiation

Issue #130 Fire Line Cathodic Protection Pending negotiation

Issue #134 Stainless Steel Pipe Supports on Channel Air Line Pending negotiation

Issue #152 Credit for Grating over Chlorine Contact Tank Influent Channel ($2,350)

Pending final change order

10. Apprentices

Four apprentices (one electrical, one general laborer, one carpenter, and one iron worker) worked on the project throughout the month of May.

Work Activities planned for June 2009:

• Complete roofing on the Effluent Pump Station. • Complete installation of the Vertical Propeller pumps in the Effluent Pump Station. • Install day tanks, stationary and penthouse louvers in Effluent Pump Station. • Continue painting of piping in Effluent Pump Station and Chlorine Contact Tanks • Install chemical induction mixers in Chlorine Contact Tanks • Continue patching and sacking concrete surfaces of Chlorine Contact Tanks and Effluent

Pump Station • Continue to form and place walls, stairs, and landings for the Primary Clarifier Influent

Channel and Blending Channel • Continue to form and place concrete for Primary Clarifier Nos. 7 base slab and wall

sections, including parapet walls and elevated walkways around Primary Clarifier No. 6 • Continue installation of mechanical equipment in several areas, including the Polymer

Activation Units • Continue electrical work in several project areas. • Continue Material and Equipment Procurement • Continue to receive equipment (Pumps, Valves, etc.) • Continue to forward equipment, operation and maintenance manuals, startup, and training

submittals for review, including monthly schedule update.

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Wet Weather Improvements May 2009

Progress Photo 01 – Effluent Pump Station East Elevation

Progress Photo 02 – Effluent Pump Station North Exterior Stairs

Wet Weather Improvements May 2009

Progress Photo 03 – Effluent Pump Station Roof

Progress Photo 04 – Motor Control Centers installed in Effluent Pump Station

Wet Weather Improvements May 2009

Progress Photo 05 – Chlorine Contact Tanks Overview looking West

Progress Photo 06 – Chlorine Contact Tanks with light standards installed

Wet Weather Improvements May 2009

Progress Photo 07 – Installing 84-Inch Outfall Gate at existing Chlorine Contact

Tank Outfall

Progress Photo 08 – Primary Clarifier Overview looking West

Wet Weather Improvements May 2009

Progress Photo 09 – Overview of Primary Clarifiers looking East

Progress Photo 10 – Sluice Gates installed at new Primary Clarifiers

Wet Weather Improvements May 2009

Progress Photo 11 – Cutting of Concrete Blending Channel Wall

Progress Photo 12 – Wall removed at connection area for new to existing Blending

Channel

Job No:Project No: Page:Page: 1 of 11 of 1

Date: 6/1/2009Open Requests for Information

Status Request Dated Responded RequiredIssueRFI Number From To TitleChange

Report r_a_rfi_03_harris

Item No.

CMSA - Wet Weather Improvements

Open Submittal Log - Sorted by Submittal No.

Project No:Job No: 07-01

061-0491.01 Page:Date: 6/1/2009

1 of 1

Submittal TitlePackage Rev. FinishRequired

Status Rcvd. Sent Return Forward BICLatest Dates

Central Marin Sanitation Agency

247 Reinforcing Steel - EPS Upper Slab03200-EPS Upper 03200 001 R&R 8/18/2008 8/19/2008 9/5/2008 WESTWATR9/8/2008

258 Reinforcing Steel - PC Blending Chn03200-PC Blend 03200 001 R&R 9/30/2008 9/30/2008 10/16/2008 WESTWATR10/16/2008

253 Reinforcing Steel - PC Upper Slab03200-PC Up Slb 03200 001 R&R 9/2/2008 9/3/2008 9/17/2008 WESTWATR9/23/2008

246OM Vertical Propeller Pump O&M Manual11312D-O&M 11312D 001 OPN 4/22/2009 4/22/2009 CAROLLO

131OM EPS Submersible Sump Pump O&M11312K - O&M 11312K 001 OPN 5/11/2009 5/12/2009 CAROLLO

207OM Polymer Activation Unit - O&M11347-O&M 11347 001 OPN 5/11/2009 5/12/2009 CAROLLO

236OM Chemical Induction Mixer O&M Manual11348-O&M 11348 001 OPN 5/12/2009 5/12/2009 CAROLLO

189S Sludge Collector Isolation Switch11351-ISR 11351 001 OPN 5/22/2009 5/22/2009 CAROLLO

114OM Aeration System O&M Manual11378-O&M 11378 001 OPN 5/11/2009 5/12/2009 CAROLLO

274 FRP Launders & Baffle Walls13120-1.03-A.1 13120 002 R&R 4/20/2009 4/20/2009 5/13/2009 WESTWATR5/15/2009

163OM Fuel Storage Tank O&M Manual13209-O&M 13209 001 OPN 5/12/2009 5/12/2009 CAROLLO

279 Motorized Actuators for Valves13447-Valves 13447 001 OPN 5/22/2009 5/22/2009 CAROLLO

245 Fire Alarm - Product Data13851-1.08-B 13851 003 R&R 4/23/2009 4/23/2009 5/6/2009 WESTWATR5/15/2009

245 Fire Alarm - Shop Drawings13851-1.09-B 13851 003 R&R 4/23/2009 4/23/2009 5/6/2009 WESTWATR5/15/2009

132OM Fire Sprinkler System O&M Manual13930-O&M 13930 001 OPN 5/11/2009 5/12/2009 CAROLLO

250 Control Valve for Solenoid15117-2.06 15117 001 R&R 8/20/2008 8/20/2008 10/24/2008 WESTWATR10/28/2008

226 Air Handling Units - Shop Drawings15855-1.04-A 15855 003 R&R 4/23/2009 4/23/2009 5/21/2009 WESTWATR5/27/2009

200 Low Voltage Distribution Mini-Power16273-1.03-A 16273 R&R 3/12/2008 3/13/2008 4/1/2008 WESTWATR4/3/2008

Report r_sb_01_c_01