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Home My WebLink AboutPW CNT 15-21/Amend 1 a.■,�0� AECOM 920.235.0270 tel �� 558 North Main Street 920.235.0321 fax Oshkosh,WI 54901 - RECEIVED MAR 19 2015 DEPT OF PUBLiC WORKS March 17, 2015 OSHKOSH, WtSCONSIN Mr. David Patek, Director of Public Works City of Oshkosh 215 Church Avenue P.O. Box 1130 Oshkosh, Wisconsin 54903-1130 Subject: Amendment Request Number 1 for Environmental and Construction Material Testing Services Related Public Works Facility Phase I and II by Adding Phase III Services For Contract 15-21,AECOM Project No. 60301190, City Resolution Number 13-336 Dear Mr. Patek, AECOM Technical Services, Inc. (AECOM) is requesting an amendment to the agreement dated June 21, 2013, of Environmental and Construction Material Testing Services related to this project. This amendment request is for additional Environmental Documentation and Material testing for the Phase III addition of the Salt and Cold Storage buildings to the facility. The services outlined below are the same as provided for Phase I and II construction. Please note the original budgets for the Phase I and II documentation report and Post Construction Groundwater Sampling as outlined in the original proposal were used to provide additional field documentation as requested by City Staff. Therefore this amendment requests these tasks be completed and budgets be refunded. Scope of Services - Environmental Services Contaminated Soil Management Based upon the WDNR permit requirements, the contaminated soil removed from the project excavations will be managed as a special solid waste and disposed off-site into Waste Management Valley Trail Landfill in Berlin, Wisconsin; or it will be reused on site. Three waste stream profiles have been identified at the site: general fill/solid waste, general petroleum contamination, and waste oil contamination. We propose to have an AECOM representative on site to observe and identify the excavation areas containing petroleum impacted soil requiring disposal. This will be accomplished through visual and olfactory observations (sheen, petroleum product, stained soils, and petroleum odors), and field screening of the soils excavated for obvious signs of contamination. The AECOM field staff will use a photo ionization detector(PID) to field screen the excavated soils. PID field screening readings of 15 instrument units (equivalent to ppm) or higher will be considered contaminated and hauled to the Valley Trail Facility. Nonpetroleum impacted fill soils/solid waste that can be reused for site fill will be segregated and reused. Nonpetroleum impacted fill soils/solid waste deemed not usable as backfill material will be hauled to the Valley Trail Facility for disposal. 60304936_Amendment 1_awc.docx � AECOM 2 The contaminated soil disposed of in a landfill requires manifesting, which needs a signature by an authorized representative of the City of Oshkosh. To expedite the processing of the landfill profile acceptance applications and soil removal activities for this project, the City of Oshkosh will delegate authority to AECOM to sign the waste profile application and transportation manifests on behalf of (acting as an agent for) the City of Oshkosh. It is understood that the City of Oshkosh will remain the responsible party for all final decisions regarding management and disposal of contaminated materials encountered during this project. By authorizing this proposal, the City of Oshkosh will also be authorizing Paul F. Timm and his designees of AECOM to act as the authorized agent for the City of Oshkosh for completing the waste profile and transportation manifests, as needed, to dispose the contaminated soil under this contract. Contaminated Groundwater Management , Groundwater removed from the project excavations will be collected and pumped into the Oshkosh sanitary sewer system under the conditions provided in the temporary discharge permit obtained by AECOM, on behalf of the City of Oshkosh. AECOM proposes to be on site periodically to make sure the contractor is discharging groundwater in accordance with the temporary discharge permit. Underground Utilities Utilities running through the solid waste fill and petroleum impacted areas could create routes of less resistance for gases and liquids to migrate into and from the site. In compliance with the permit requirements, utilities entering and leaving the project area limits, as depicted on the Construction Plan Sheets, will have a trench plug. Trench plugs will be placed where the utility line enters a structure. AECOM proposes to document the location, construction, and size of each trench plug. Vapor Mitigation A vapor barrier, comprised of an impermeable liner and passive venting system, will be installed below structure slabs and foundations to prevent the migration of moisture and vapors produced by the solid waste fill and/or petroleum impacts left in place. This vapor barrier, consisting of a polyethylene(PE) geomembrane sealed at the seams, provides a continuous barrier between the subsoil and floor slab. The passive venting system will be comprised of perforated piping between the building foundations, floor slab, and subsoil. AECOM proposes to document this barrier's installation. Phase III Construction Documentation Report This report will summarize subsurface soil and groundwater environmental conditions encountered during Phase I, II and III of the construction. In addition, this report will provide environmental construction documentation for the structures that will be completed in all phases. Post-Construction Groundwater Sampling and Summary Report This report will summarize subsurface soil and groundwater environmental conditions encountered during installation of new perimeter groundwater monitoring wells. We anticipate the WDNR will require at least two quarters of monitoring as part of WDNR site closure requirements. For budgeting purposes we have included costs for installation of six, 15-foot deep groundwater monitoring wells. The wells will be developed and sampled in accordance with WDNR guidelines. Two quarterly groundwater sampling events for Volatile Organic Compounds, Polynuclear Aromatic Hydrocarbons, and RCRA metals are included. C:\Users\TimmpWppData\Local\Microsoft\Windows\Temporary Internet Files\Content.0utlook\1XM3XU4M\60304936_Amendment 1_awc.docx AECOM $ Scope of Services -Construction Material Testinp and Observations The scopes of services we propose to provide on this project are based on a request by Kueny Architects and are described below. Services not listed or that are requested during the project can be added on request. All test data and observafions will be forwarded to the City of Oshkosh and Kueny Architects for review and verification of compliance with plans and specifications. Please note the frequency of testing can be modified as test results become available. Cast-in-Place Concrete During cast-in-place concrete work for columns, beams, slabs, and decks, we propose to provide a technician to perform the following services: • Check ready mix truck ticket for approved concrete mix number • Test consistency(slump of fresh concrete for each set of cylinders cast) • Perform air content tests for each set of cylinders cast for air entrained mixtures • Measure concrete and ambient temperatures at placement time for each set of cylinders cast • Record batch-to placement time • Cast a set of 4-inch by 8-inch or 6-inch by 12-inch compressive strength specimens consisting of five cylinders for each set of cylinders cast, so that finro cylinders can be tested at seven days and 2 cylinders tested at 28 days. An additional cylinder will be cast and tested at 28 days when 4-inch by 8-inch cylinders are used. The remaining cylinder will be held in reserve in case additional testing is required. We will initially cure the cylinders on-site and then transport the cylinders to our laboratory the following workday for moist curing and subsequent testing. The frequency of testing will be for each day's pour for each concrete mix, change of source, each 100 cubic yards of concrete poured.When temperatures are below or expected to fall below 45 degrees F, two additional cylinders will be made and cured in the field under conditions approximating conditions affecting the concrete they represent. One will be tested at seven days, the other at 28 days. • Forms will be observed for cleanliness prior to concrete placement. • Prior to placement of concrete, our representative will check the mild steel reinforcement columns, beams, slabs, shear walls, and deck for bar size, length, number of bars, and overall configuration, and compare to approved shop drawings. Earthwork, Foundation and Utilities We anticipate the installation of the rammed aggregate piers will be documented by the contractor during installation. AECOM maybe contracted directly with the contractor for this work. Based on our experience, this is an industry standard approach since the rammed aggregate pier supplier provides a warranty on the design, installation, and performance of the piers. During foundation excavation, subgrade preparation, structural fill placement, building pad preparation, compaction of the sub-base in the slab-on-grade areas, backfilling around the interior of foundation walls, footings, rammed aggregate piers, grade beams, and utility trenches, we propose to perform the following services while on site: C:\Users\Timmp�AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.0utlook\1XM3XU4M\60304936_Amendment 1_awc.docx AECOM 4 • Observe soil conditions at the base of the foundation excavations and compare to the soil bearing strata recommended in the AECOM Geotechnical Report, dated October 29, 2012, and the rammed aggregate pier design criteria and recommendations. • Observe subgrade soil at design elevation or prior to fill placement to evaluate if unsuitable soils, organics, topsoil, or other materials determined to be unsuitable have been stripped. • Observe proof roll of the slab-on-grade area for evidence of deflection and/or rutting, and provide recommendation to imprave unstable or unsuitable soil. • Obtain from the project site samples of the proposed fill, backfill, and aggregate base course for laboratory testing consisting of a modified Proctor in accordance with ASTM D1557. • Perform in-place density testing of the engineered fill during building pad preparation; backfilling around interior column footings, footings, and along the interior of foundation walls and grade beams using a nuclear moisture density gauge or Dynamic Cone Penetrometer (DCP). The frequency of testing will be based on type of fill, depth, and size of areas of fill placement. In general, one density test for each 50 cubic yards per 12-inch lift or for each 100 lineal feet per 12-inch lift in utility trenches will be performed. • Perform in-place density tests on the sub-base under the slab-on-grade using a nuclear moisture density gauge or DCP. • Perform in-place density testing for fill placed and compacted in the top four feet from the surrounding grade in the utility trenches using a nuclear moisture density gauge or DCP. Structural Steel During structural steel erection operations, a Steel Technician will perform the following tests and observations in accordance with project documents: 1. Field-Bolted Structural Connections • Review the installation of high strength fasteners for conformance with the requirements of Sections 2, 3, and 8 of the American Institute of Steel Construction's Specification for Structural Joints using ASTM A325 or A490 Bolts. 2. Field-Welded Structural Connections • Review of applicable welding procedures, welder's certification, and material test documentation for conformance to the applicable specification requirements and approved submittals • Visually review weldments for conformance to the visual acceptance criteria established by the American Welding Society's (AWS's) Structural Welding Code D1.1 • Perform appropriate nondestructive evaluation, via liquid penetrant or magnetic particle method, on visually suspect weldments. • Perform nondestructive evaluation, via ultrasonic method, on penetration weldments of effective thickness greater than 5/16 inches, for conformance to the Ultrasonic Acceptance-Rejection Criteria (Table 6.2) of the AWS's Structural Welding Code D1.1 3. Metal Deck • Check that the roof deck and composite metal deck are placed and connected in accordance with manufacturer's recommendations and approved shop drawings. Check deck puddle welds for quality, count, size, and spacing. C:\Users\TimmpWppDatalLocal\Microsoft\Windows\Temporary Internet Files\Content.0utlook\1XM3XU4M\60304936_Amendment 1_awc.docx AECOM 5 • Check that adjacent deck sheet connections have been completed (using button-punch or attachment screws), and that spacing of these connections is in conformance with the approved shop drawings. • Check count for conformance to structural drawing and bend at least two shear connectors for each day of installation. • Observe 360°welds for shear connector for conformance to AWS requirements. Please note this task may be subcontracted based on final site construction schedule. Masonry During masonry construction, we propose to have a Technician perform the following while on site: • Sample masonry mortar from the mason's board in general accordance with ASTM C780 for compressive strength requirements. Our representative will prepare one set of six 2-inch x 4-inch samples of masonry mortar for compressive strength testing for each site visit. • Sample grout in general accordance with ASTM C1019 for compressive strength testing requirements. Our representative will prepare one set of six 3-inch x 6-inch samples of grout for compressive strength testing for each site visit. Bituminous Concrete Pavement During subgrade preparation, pavement base course and bituminous concrete installation, our field representative will perform the following while on site: • Observe the contractor's stringline for comparison of the prepared subgrade and finished grade to the required (design) total pavement thickness. • AECOM's representative will observe proofrolling of the subgrade and provide recommendations for improving subgrade if areas of excessive pumping and/or rutting are observed prior to placement of fill or aggregate base course. • Perform in-place density tests on the aggregate base course. Testing will be performed using conventional nuclear moisture density gauge or DCP testing techniques at the frequency required in the specification. • Check the loose lift thickness of the bituminous concrete during placement. • Check the delivery and mat temperature of the bituminous concrete mixes during paving operations. • Estimate degree of compaction of the bituminous concrete mixture using a nuclear density gauge. • A sample of the bituminous concrete will be delivered to our laboratory for gradation and extraction tests, and the results will be compared to the approved job mix formula. • Witness the surface smoothness. Project Management and Reporting C:\Users\TimmpWppData\Local\Microsoft\Windows\Temporary Internet Files\Content.0utlook\1XM3XU4M\60304936_Amendment 1_awc.docz AECOM 6 Our field representative will prepare Daily Field Reports for each site visit. This report will summarize our observations and field test results. Observations and test results will be compared to project specifications. During construction, our Project Manager will review and transmit field and laboratory reports to the project team on a periodic basis. A Corrective Action Log for field related items in our work scope that are observed by our representative and do not meet specifications will be prepared and submitted with the Daily Field Reports. As deficient items are corrected, they will be removed from the log. AECOM proposes the same team as provided for Phase I and II, comprised of Paul Timm, Account Manager; Andrew Mott, Environmental Project Manager; Tim Wolf, Construction Material Testing Service Manager; and Mark Magee, Shannon Allen, and John Kirchner, Field Staff. This proposed team is comprised of AECOM staff that understands client expectations, have previous project involvement, have been involved with similar projects, understand respective project responsibilities, and provide a reasonable cost approach with sensitivity to overall project cost. The services provided will be performed in accordance with the 2015 Negotiated Fee Schedule and conditions of the General Conditions of Service—City of Oshkosh, April 2009, which are expressly incorporated into, and are an integral part of, our agreement for professional services. AECOM can begin providing these services immediately upon receipt of the signed Amendment Authorization Form (attached). If you have any questions or need to clarify a point, please call any of the undersigned at 920-236-6718. Sincerely yours, - `/%�� fi�' � . i�� Albert Cole Paul F. Timm Senior Program Manager Account Manager Attachments: Project Cost Estimate Amendment to Agreement Form Amendment Authorization Form C:\Users\Timmp�AppData\LOCalUlAicrosoft\Windows\Temporary Internet Files\Content.0utlook\1XM3XU4M\60304936_Amendment 1_awc.docx A=COM AECOM 558 North Main Street,Oshkosh,WI 54901 T 920.236.6718 F 920.235.0321 Amendment to Agreement Form Amendment No. 1 Environmental and Construction Material Testing Services Related To the Proposed Public Works Field Operations Facility Phase III AECOM Project No. 600301190 City of Oshkosh Resolution No. 73-336 RETURN TO: AECOM Date: March 17, 2015 558 North Main Street Oshkosh, WI 54901 Attention: Paul Timm SUMMARY: Original Contract Amount: $429,475 Total Previous Amendments: $0.00 Amount this Amendment: $170,000 Revised Contract Amount $599,475 Amendment# DESCRIPTION AMOUNT 1 Additional Environmental Documentation $119,860 Additional Material Testing 51 140 Total Amendment No 1 $170,000 C:\Users\TimmpWppData\Local\Microsoft\Windows\Temporary Internet Files\Content.0utlook\1XM3XU4M\60304936_Amendment 1_awc.docx A=COM AECOM 558 North Main Street,Oshkosh,WI 54901 T 920.236.6718 F 920.235.0321 Amendment to Agreement Form Authorization March 17, 2015 I hereby certify that the necessary provisions have been made to pay the liability which will accrue under this contract. I hereby authorize AECOM to proceed with the scope of work outlined in the Amendment No 1 to the proposal for Environmental and Construction Material Testing Services Related to the Oshkosh Public Works Facility, AECOM's proposal OPP—210495 dated June 21, 2013 with an amended budget authorization of$599,475 under the general terms and conditions specified in the proposal. /�i'�%ilL b�- I5-Zv►`5 Sign ture Date Mark A Rohloff Print Name City Manager T� Organization � '� �� Signature Date Pamela R. Ubrig; Print Name City Clerk Titl rganization �l-/�"ar��s' Si re Date Lynn A. 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