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Home My WebLink AboutAgenda Report - August 6, 2014 C-14AGENDA rrEM c'Fl Crrv on Lonr C ouNcrr, C oTvTMUNICATIoN IM AGENDA TITLE: MEETING DATE: PREPARED BY: Receive Update on Emergency Condition at White Slough Water Pollution Control Facility Digesters No. 1 and No. 2 August 6,2014 Public Works Director RECOMMENDED ACTION Receive update on emergency condition at White Slough Water Pollution Control Facility Digesters No. 1 and No. 2. BACKGROUND INFORMATION: White Slough Water Pollution Control Facility (WSWPCF) has four ::ä:*:;i3'f i''i:',"jì,'i'?',i:i"'"',|,:Häïiå3Ë?1':' Council declared an emergency condition in response to concurrent roof failures on Digesters No. 1 and No. 2. Public contract code requires Council to review the emergency action at its next regularly-scheduled meeting and each regularly-scheduled meeting thereafter until the emergency is terminated. On July 21, 2014, representatives from the City, West Yost Associates (WYA) and the two contractors (Western Water Constructors, lnc., and Overaa Construction) invited to submit guaranteed maximum price (GMP) proposals, met to introduce the contractors to the project and to define the project scope. Both contractors have successfully participated on projects at other agencies where the GMP procurement method was used. Representatives from WYA provided draft contract documents that included a GMP contract, specifications and preliminary drawings representing the required work items for review. The meeting concluded with a site walk to familiarize the contractors with the work area and to point out specific details of the project scope in the field. The minutes of this meeting are attached. A preliminary procurement and construction schedule reflecting project milestones is referenced below: Project Definition Meeting lssue Final Contract Documents Receive GMP Proposals lssue Notice to Proceed Complete Digester No. 2 lmprovements Complete Digester No. 1 lmprovements July 21,2014 August 1,2014 August 15,2014 August 29,2014 April 30, 2015 December 7,2015 APPROVED f, K:\WP\PROJECTS\SEWER\WSWPCF\DigesterRepairs\Council Updates\CUpdate080614.doc Manager 712312014 Receive Update on Emergency Condition at White Slough Water Pollution Control Facility Digesters No 1 and No.2 August 6,2014 Page 2 FISCAL IMPACT:Preliminary construction cost estimate to repair Digester No. 2 remains at approximately $1,400,000 and to repair Digester No. 1 remains at approximately $1,700,000 at this time. FUNDING AVAILABLE Wastewater Capital (171493) - An appropriation in the amount of $3,100,000 was authorized by Council on July 16, 2014. F. Wally lin Public Works Director Prepared by Charlie Swimley, City Engineer / Deputy Public Works Director FWS/CES/pmf Attachment cc: Associate Givil Engineer Nathan Charlie Swimley, City Engineer / Deputy Public Works Director Wastewater Plant Supervisor K:\WP\PROJECTS\SEWER\WSWPCF\DigesterRepairs\Council Updates\CUpdate080614.doc 712312014 Minutes Digester Repair Project Definition Meeting July 21, 2014 Minutes for 20140721 Scoping Mtg.docx Page 1 of 3 7/22/2014 Client: City of Lodi Project: Digester Repair Project Subject: Project Definition and Draft GMP Contract Meeting Date/Time: July 21, 2014; 9:00AM - 12:00AM Location: White Slough WPCF Minutes By: D. Anderson, D. Ewing, G. Rice ATTENDEES: DISCUSSION TOPICS: 1. The following preliminary procurement and construction schedule was discussed. During the discussion it was agreed that West Yost will revise the anticipated completion dates to reflect decisions made during the meeting, and that liquidated damages should be based on the revised anticipated completion dates. Milestone Anticipated Date Meeting to define project/provide draft contract documents 7/21/14 Issue final contract documents 8/1/14 Receive GMP proposal 8/15/14 Issue Notice to Proceed 8/29/14 Complete Digester 2 improvements and commissioning 4/30/15 Complete Digester 1 improvements and commissioning 12/7/15 Name Representing Email Phone Stephen Schwabauer City of Lodi sschwabauer@lodi.gov (209) 333-6700 Charlie Swimley City of Lodi cswimley@lodi.gov (209) 333-6800 Sean Nathan City of Lodi snathan@lodi.gov (209)333-6800 Karen Honer City of Lodi khoner@lodi.gov (209) 333-6868 Gary Wiman City of Lodi gwiman@lodi.gov (209) 333-6706 Ken Capitanich City of Lodi kcapitanich@lodi.gov (209) 333-6749 Dave Ewing West Yost purdue76@sbcglobal.net (530) 304-0972 Gary Rice West Yost grice@westyost.com (707) 543-8506 Dave Anderson West Yost danderson@westyost.com (530) 792-3281 Brad Friederichs West Yost bradf@vesolutions.net (916) 505-0519 Sharon Kimizuka A TEEM Electrical Engineering skimizuka@ateem.com 916 457-8144 Siaoming Li A TEEM Electrical Engineering sli@ateem.com 916 457-8144 Nick Kebbas Overaa Construction Company nickk@overaa.com (510)-234-0926 Rich Papas Overaa Construction Company richp@overaa.com (510)-719-0014 Josh McGarva Western Water Constructors josh.mcgarva@westernwater.com (707) 696-6426 Bill Wright Western Water Constructors bill.wright@westernwater.com (707)540-9640 Minutes for 20140721 Scoping Mtg.docx Page 2 of 3 7/22/2014 2. The draft construction agreement and exhibits to the agreement were discussed, and the following action items were identified: Action Item No. Action Items Party Responsible Target Date Status 1 Determine if City building permit is required, and information needed by Building Dept. City (Wiman) 7/21/14 Done 2 Provide mixing analysis completed by Vaughan Pumping Systems City (Nathan) 7/21/14 Done 3A Provide comments on draft agreement to WY Overaa 7/25/14 3B Provide comments on draft agreement to WY Western Water 7/25/14 3C Provide comments on draft agreement to WY City 7/25/14 4 Provide copies of prior construction drawings to Overaa and Western Water West Yost 7/25/14 5 City to survey and verify inside diameter of Digesters 1 and 2 City 7/30/14 6 Identify Contractor field office/laydown areas West Yost 8/1/14 7 Complete Building Department submittal West Yost (Friederichs) 8/1/14 8 Updated/finalize Contract Documents including Bid Form, Bid submission requirements, and preliminary structural, mechanical, and electrical drawings. West Yost 8/1/14 3. During and following the site investigation the following decisions were made: a. The upper portion of the walls of Digesters 1 and 2 will be repaired and coated, but will not be thickened. b. Digester walls where concrete appears to be corroded and the embedded steel cover guides will be bead blasted to sound material. Wall surfaces requiring concrete repairs will be power washed and repaired as specified. Top 8 feet of digester walls shall be coated with high performance epoxy as specified. c. The grated walkway between Digesters 1 and 2 modified so that it is more securely fastened to the concrete landing at Digester 1. d. The gas piping between Digesters 1 and 2 will be modified to include isolation valves near each digester. e. The speed of digester mixing pumps will not be controlled by VFDs. f. Instrumentation will added to Digesters 1 and 2 to allow City staff to monitor digester sludge levels. Signals will be sent to an existing PLC in the Digester Control Building. Minutes for 20140721 Scoping Mtg.docx Page 3 of 3 7/22/2014 g. All questions arising during the review of preliminary documents or in response to final documents will be shared between all parties. h. There will be some interference between existing service water lines and possibly with digester gas lines at both Digesters 1 and 2 and this should be noted on the drawings. i. Contractors expressed concerns regarding weather related delays for coating of digester covers and concrete walls. Tenting is a possibility but how to work the cost of tenting into the contract…allowance, required cost, additional cost if required, etc. is under consideration by the City and West Yost. j. Work within the digesters is a confined space (probably a permit required confined space) and will require purging of any residual digester gas as well as appropriate ventilation and lighting. k. All work within or adjacent to the digester is classified either as Class I, Divisions 1 or 2 and all code-related safety and construction requirements should be followed strictly. l. The City will pump the contents of Digester 1 to Digester 2. Transfer pumping does not need to be provided by the Contractor and the specification within the binder will be deleted. m. Digester cleaning of the residual content in the Cone of digester 1 is required as specified. n. Brad Friederichs will prepare calculations necessary for building permit submittal review. Brad will include a reference to code language regarding the exemption for existing structures where modifications do not increase loads by more than 10 percent.