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HomeMy WebLinkAboutChange Order No. 1 with Petra Inc. for New City HallETR _rM GENERAL CONTRACTORS & CONSTRUCTION MANAGEMENT September 12, 2007 Mr. Will Berg, City Clerk Mr. Keith Watts,. Purchasing Agent CITY OF MERIDIAN 33 E. Idaho St. Meridian, ID RE: Construction Management Fee Change Order Request No. 1 Gentlemen:. Enclosed is Change Order Request. No. 1 for the Construction Management. Fee, General Conditions Reimbursable Expenses and Reimbursable Temporary Expenses in accordance with the Agreement Between the City of Meridian and Petra Incorporated, the Construction Manager of Record for the New City Hall construction project. In particular as noted in Articles 6.2.2 (a), 6.2.2 (b) and 7 (b) relative to changes in project size, complexity and conditions. The Agreement Between the City of Meridian and Petra. Incorporated called for an 80,000 SF building. valued at $12.2 Million dollars for the purpose of setting the CM Fee and establishing the construction schedule. During the Site Preparation Phase, unforeseen conditions were encountered that were not part of the Owner's Request for Services nor were these conditions identified in the Owner provided subsurface exploration documentation. These conditions consisted of petroleum based products found in the soil beginning at the South side of the old boiler house foundation and extending to the South property line. These deposits were found in multiple locations in the Southern 1/3 of the site and were anywhere from 3-0 below surface to 16-0 below surface. A narrative timeline noting the process involved with the discovery and removal of the contaminated soils is included with this letter, along with a graphical representation of the additional work and the impact to the construction schedule these contaminated soils invoked on the project. When initially uncovered, it appeared that the contaminated soils were confined to a small area corresponding to possible fuel oil storage tanks possibly located on the South side of the boiler house of the H:\PROJECTS\2006\Wes\Meridian City Hall\Change Order Requests\CM Fee Contaminated Soil 09-12-07.doc 1097 N. RoSARIO ST. MERIDIAN, ID 83642 PHONE: (208) 323-4500 FAX: (208) 323-4507 WWW.PETR.AINC.NET RCE-1875 CM Fee Change Order No. 1 Page 2. September 12, 2007 original creamery complex. Exploratory excavation around this find supported an estimate of 1,000 CY of removal required. Within just a few days after the initial contaminated soil discovery, a second pocket of "gooey dirt" was uncovered. More exploration found multiple sources of contamination that were migrating in a South to Northwest direction in the subsurface strata. Compounding this issue was the confirmation of a clay layer or lens at approximately the 16-0 below surface level that was containing the ground water below the lens and the soil contamination above the lens. Extra care was utilized in association with the Geo-technical Consultant, Terracon; the Contamination Consultant, MTI; Petra, and Ideal Demolition to first confirm that, no ground water contamination was occurring from the site due to the contaminated soil and secondly to keep the clay lens intact while the contaminated soil was removed to preserve the integrity of the protective membrane and insulate the City from creating a ground water contamination issue. The discovery of the contaminated soils and the extent of the ground water under the clay lens eventually influenced the design of the City Hall building when no entity was found that would accept the discharge of the ground water during the construction dewatering or the long term dewatering that would be required to keep the basement dry due to ground water migration. Raising- the building finish floor elevation ~ four feet put the bottom of the basement floor above the clay lens and out of any ground water influence, except for normal surface water migration. This decision required re-design of the site elevations, the building, exterior elevations and the basement foundation drain, all after the Phase II-Shell and Core packages had been awarded. Upon discovery of the contaminated soils, Petra Incorporated brought Project Superintendent Jon Anderson on site a full month before he was. scheduled to start the site excavation which was to be April 4,-2007. Jon arrived on site March 5, 2007 and began directing the contaminated soil removal. Due to the extent of the contamination and the change in design, the contaminated soil removal and correction to the site elevations began on March 12, 2007 and the last load of contaminated soil left the site on May 14, 2007. The Site Contractor for the new construction, MJ's Backhoe and Excavation, Inc. mobilized on site on May 7, 2007 and began working on importing structural fill to replace the material removed as contaminated and removing unsuitable soils identified by Terracon, Inc. that did not meet the Geo-technical- report requirements. Petra Incorporated is asking for 336 of the 380 man hours that Mr. Anderson spent on the Meridian City Hall project during this period of contaminated soil removal from March 5, 2007 through May 14, 2007 managing the contaminated soil removal and well closures which were not part of the original scope of work in the Site Preparation Phase of Petra's CM agreement with the City of Meridian. In addition, Petra is asking for reimbursement for 169.5 man' hours of Project Engineer time spent during this same time period of the 294 man hours -spent by the Project Engineer. No request for compensation for Project Director/Manager Gene Bennett's 82.0 man hours has been requested. In comparison the contract for the Site Preparation Phase was to include 5% of the Project Manager and Project Engineer's time. H:\PROJECTS\2006\Wes\Meridian City Hall\Change Order Requests\CM Fee Contaminated Soil 09-12-07.doc CM Fee Change Order No. 1 Page 3. September 12, 2007 No Project Superintendent time was included since no extensive work was anticipated, based on the Brownsfield Report provided by the City. The additional CM Fee that is being requested is in accordance with Articles 6.2.2 (a), 6.2.2 (b) and 7 (b) due to changes in project complexity, size and conditions. The total cost for the removal of the contaminated soils, as confirmed by Meridian City Purchasing is $422,000.00 in compensation to Ideal Demolition, Inc: Petra is requesting 4.7% of the amount paid to Ideal Demolition, Inc. in additional CM Fee or $19,384.00. Since this was an unforeseen issue that could not be anticipated and included multiple participants including ;=Iydrologic for the well closures, Terracon for soil and water testing beyond their original contract and MTI for all of the contamination testing, work plan and documentation, with IDEQ; Petra has only included the costs for the actual contaminated soil removal by the abatement contractor rather than include the costs of all of the activities that Petra was managing during that time frame. Best Re ards, Wesley W Bett r. Construction Manager Encl c: Ted Baird City Attorney's Office File H:\PROJECTS\2006\Wes\Meridian City Hall\Change Order Requests\CM Fee Contaminated Soil 09-12-07.doc Meridian City Hall Narrative Time Line on Contaminated Soils January 10, 2007 "Diesel smelling" soil identified South of old Boiler House location. Investigation into type of contamination and extent of area impacted begins. February 21, 2007 Contaminated Soil identified in limited area as petrochemical, fuel oil in nature. Memo to Pubic Works Director noting do detectable water contamination and budget for Abatement Contractor to handle and process impacted product. Recommendation to the City to not spend additional money trying to determine extent of contamination. March 10, 2007 Petra Superintendent Jon Anderson mobilizes to the site to manage the removal of the contaminated soil and coordinate the documentation between testing agency and IDEA to insure compliance with IDEQ & EPA requirements. March 12, 2007 Excavation of original contaminated soil area underway. New contaminated source identified expanding original volume estimates by double. March 12, 2007 to May 14, 2007 Excavation and trucking of contaminated soils continues. as new pockets of source contamination are identified. This includes the discovery, design and eventual closing of three hand dug cisterns that were filled with contaminants. The last load of contaminated soil leaves the site on May 14, 2007. March 20, 2007 to April 11, 2007 Discussions with city Council regarding options relative to ground water and the designed building finish floor elevation. Decision by Council to raise finish floor elevation four vertical feet to 2610.40 generates ASI from Design Team to modify concrete design, structural steel design, exterior elevation finishes and exterior grades. April 1, 2007 Petra assigned responsibility of monitoring well closure contractor, Hydrologic, Inc, previously monitored by Public Works Department. May 7, 2007 MJ's Backhoe and Excavation, Inc. mobilizes on site to begin bringing in structural fill to replace removed contaminated soil. May 14, 2007 Ideal Demolition, Inc. closing last hand dug pit under direction of MTI. Unsuitable soils found in basement excavation area (ash & clay) directed to be removed by Terracon, Inc. May 17, 2007 Last load of contaminated soil leaves site. Removal and replacement of unsuitable soils continues.