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CAG-20-031, Adden #6-26 W'ϮK&Ϯ /dzK&ZEdKE Ǉ͗ͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ KE^h>dEd Ǉ͗ͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ DĂƌƚŝŶWĂƐƚƵĐŚĂ WƵďůŝĐtŽƌŬƐĚŵŝŶŝƐƚƌĂƚŽƌ ĚǁŝŶ,Ăůŝŵ ŝƌĞĐƚŽƌ͕Z,ϮŶŐŝŶĞĞƌŝŶŐ͕/ŶĐ͘ ͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ ĂƚĞ ͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ ĂƚĞ ƚƚĞƐƚ ͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ :ĂƐŽŶ͘^ĞƚŚ ŝƚǇůĞƌŬ ƉƉƌŽǀĞĚĂƐƚŽ>ĞŐĂů&Žƌŵ Ǉ͗ͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ ŚĞƌǇůĞǇĞƌ ƐƐŝƐƚĂŶƚZĞŶƚŽŶŝƚǇƚƚŽƌŶĞǇ ŽŶƚƌĂĐƚdĞŵƉůĂƚĞhƉĚĂƚĞĚϬϲͬϭϳͬϮϬϮϭ "!# $ ! " N/A Approved by Cheryl Beyer via email 5/28/2026 1 5/11/2026 10:59:20 AM \\corp.rh2.com\projects\Project\Data\REN\119-215\00 Contract\Amend No. 6\Amnd_No. 6_EXH A-6_SOW_Rainier SWPS SDC.docx EXHIBIT A-6 Scope of Work City of Renton Rainier and Oakesdale Stormwater Pump Stations Alternatives and Feasibility Evaluation Amendment No. 6 to CAG-20-031 Services During Construction May 2026 Background The City of Renton (City) retained RH2 Engineering, Inc., (RH2) to perform an alternatives evaluation of its Rainier and Oakesdale Stormwater Pump Stations (SWPS). The Rainier SWPS was constructed in the 1960s. Its electrical equipment is from the original construction and does not meet the current electrical code with regards to the location in a Class 1, Division 2 area. To meet current electrical code, new electrical equipment will need to be relocated to a separate electrical building or under a shelteroutside of the classified area. In addition to electrical equipment upgrades, the City requested RH2 evaluate alternatives for equipping the station with a permanent emergency generator. Based on the alternatives evaluation and preliminary design prepared by RH2, the City has chosen to locate thenatural gas poweredemergency generator for the Rainier SWPS within the Rainier Avenue right-of-way, just south of the existing pump station. Improvements also include upgrades to the existing electrical system and replacement pumps and associated mechanical and electrical components. The Rainier SWPS Upgrade project is currently out for bids, with construction anticipated to begin this summer. The City requested RH2 to prepare this Scope of Work to assist with construction contract administration for the project. Task 11 – Services During Construction Objective: Review shop drawings and catalog submittals. Observe construction activities on site and attend weekly construction progress meetings to monitor the quality and compliance of the work with the construction contract plans and specifications to the extent possible by the level of observation. Observe the startup and testing of the Rainier SWPS. Approach: Maintain regular communication with the City to discuss the project’s progress. Provide monthly invoices documenting work performed and budget status. Review shop drawings and catalog submittals of those mechanical and electrical items requested in the Technical Specifications. Provide a written response to the contractor and the City accepting or rejecting each shop drawing and catalog submittal reviewed. Review "!# ! City of Renton Exhibit A-6 Rainier and Oakesdale Stormwater Pump Stations Scope of Work Services During Construction Amendment No. 6 2 5/11/2026 10:59:20 AM \\corp.rh2.com\projects\Project\Data\REN\119-215\00 Contract\Amend No. 6\Amnd_No. 6_EXH A-6_SOW_Rainier SWPS SDC.docx Requests for Information (RFIs) and provide responses.Up to 8 hours have been budgeted for responding to RFIs. Provide an RH2 representative to attend weekly construction progress meetings.It is assumed that these meetings will be remote via MS Teams and the City will provide agendas and meeting minutes. Provide part-time construction observation services. The intent of the on-site observations is to observe the quality and compliance of the work with the construction contract plans and specifications.The Fee Estimate reflects a total of two (2) hours per week of on-site observations by an RH2 representative for the duration of the construction period (assumed to be twenty (20) weeks).Notify the contractor and the City if the work that has been observed to not have been completed in accordance with the plans and specifications and discuss rectification. Prepare a construction observation report for each site visit. Coordinate with the contractor, the City, and the qualified manufacturer’s representative for the scheduled testing and startup activities. This will include the review and supplementation of the testing protocols developed by the contractor and manufacturer’s representative, and confirmation of the tests and appropriate corrections. Document the pertinent activities and coordinate with the contractor during startup to confirm that systems comply with the plans and specifications. Notify the contractor and the City of work that has not been completed and discuss rectification. Coordinate with the City and contractor in obtaining field records. Review field records and revise construction contract drawings to prepare record drawings. Assumptions: x Deliverables will be submitted in electronic format (PDF) unless otherwise noted. x On-call construction technical support services identified in subtask 1.5 will be performed as requested by the City. An average of two (2) hours per week for twenty (20) weeks has been assumed for budgetary purposes. x The City will assume the lead role for construction administration, management, on-site inspection services, construction observation, and communication with the GC/CM as the primary contact. x Permitting assistance during construction is outside of this Scope of Work. x RH2 is not responsible for site safety or for directing any contractor in their work. x The City will coordinate directly with the contractor for testing, system shutdowns, and connections. x Construction phase services defined in this Task are variable in nature and depend in part on the contractor. RH2’s estimate is based on an experienced and reasonable contractor being awarded the construction contract. RH2 recommends the City budget the amount shown in "!# ! City of Renton Exhibit A-6 Rainier and Oakesdale Stormwater Pump Stations Scope of Work Services During Construction Amendment No. 6 3 5/11/2026 10:59:20 AM \\corp.rh2.com\projects\Project\Data\REN\119-215\00 Contract\Amend No. 6\Amnd_No. 6_EXH A-6_SOW_Rainier SWPS SDC.docx the estimate plus a contingency amount. The contingency would cover additional services if a more intensive level of observation and construction support is necessary. Provided by City: x Project lead for construction inspection and administration. x Retention of and coordination with testing firm(s) for special inspections. x Processing of pay requests. x Final completion and closeout of the contract with the general contractor. RH2 Deliverables: x Monthly invoices and budget status summaries. x Submittal and shop drawing reviews. x Attendance at weekly construction meetings. x Part-time construction observations as requested by the City. x Attendance at startup and testing. x Record drawings. Fee for Services RH2 estimates this additional work to be $49,000as shown in Exhibit B-6. Schedule The schedule for each Task is outlined in Exhibit C-6 for this Scope of Work. "!# ! Subconsultant: RH2 ENGINEERING, INC Overhead Multiplier Fee Multiplier 206.13% 12.00% Professional I $ 52.79 $ 108.82 $ 19.39 $ 181.00 Professional II $ 58.33 $ 120.24 $ 21.43 $ 200.00 Professional III $ 65.04 $ 134.07 $ 23.89 $ 223.00 Professional IV $ 71.16 $ 146.69 $ 26.14 $ 244.00 Professional V $ 76.41 $ 157.51 $ 28.07 $ 262.00 Professional VI $ 81.96 $ 168.94 $ 30.11 $ 281.00 Professional VII $ 89.54 $ 184.57 $ 32.89 $ 307.00 Professional VIII $ 97.41 $ 200.80 $ 35.79 $ 334.00 Professional IX $ 98.58 $ 203.20 $ 36.21 $ 338.00 Technician I $ 41.12 $ 84.77 $ 15.11 $ 141.00 Technician II $ 44.92 $ 92.58 $ 16.50 $ 154.00 Technician III $ 50.75 $ 104.61 $ 18.64 $ 174.00 Technician IV $ 55.12 $ 113.63 $ 20.25 $ 189.00 Technician V $ 60.37 $ 124.45 $ 22.18 $ 207.00 Technician VI $ 66.50 $ 137.07 $ 24.43 $ 228.00 Technician VII $ 72.33 $ 149.10 $ 26.57 $ 248.00 Technician VIII $ 75.83 $ 156.31 $ 27.86 $ 260.00 Administrative I $ 27.71 $ 57.11 $ 10.18 $ 95.00 Administrative II $ 32.08 $ 66.13 $ 11.79 $ 110.00 Administrative III $ 38.50 $ 79.36 $ 14.14 $ 132.00 Administrative IV $ 44.92 $ 92.58 $ 16.50 $ 154.00 Administrative V $ 51.92 $ 107.01 $ 19.07 $ 178.00 In-House Copies B/W - 8.5x11 $ 0.09 In-House Copies B/W - 8.5x14 $ 0.14 In-House Copies B/W - 11x17 $ 0.20 In-House Copies Color - 8.5x11 $ 0.90 In-House Copies Color - 8.5x14 $ 1.20 In-House Copies Color - 11x17 $ 2.00 CAD Plots Large $ 25.00 CAD Plots Full $ 10.00 CAD Plots Half $ 2.50 CAD/GIS System Per Hour $ 27.50 Mileage Current IRS Rate Subconsultants At Cost Outside Services At Cost Outside direct costs for permit fees, reports, maps, data, reprographics, couriers, postage, and non- mileage related travel expenses that are necessary for the execution of the project and are not specifically identified elsewhere in the contract will be billed at cost. Exhibit B-6 Consultant Fee Determination - Summary Sheet (Negotiated Hourly Rates of Pay) Fee Schedule Staff Classification Negotiated Hourly Rate Negotiated Rate Per Hour Rates listed are adjusted annually. "!# ! September 5, 2025 RH2 Engineering, Inc. 22722 29th Drive SE, STE 210 Bothell, WA 98021 Subject: Acceptance FYE 2024 ICR – Risk Assessment Review Dear Leilani McSpadden: Based on Washington State Department of Transportation’s (WSDOT) Risk Assessment review of your Indirect Cost Rate (ICR), we have accepted your proposed FYE 2024 ICR of 206.13%. This rate will be applicable for WSDOT Agreements and Local Agency Contracts in Washington only. This rate may be subject to additional review if considered necessary by WSDOT. Your ICR must be updated on an annual basis. Costs billed to agreements/contracts will still be subject to audit of actual costs, based on the terms and conditions of the respective agreement/contract. This was not a cognizant review. Any other entity contracting with your firm is responsible for determining the acceptability of the ICR. If you have any questions, feel free to contact our office at (360) 704-6397 or via email consultantrates@wsdot.wa.gov. Regards, SCHATZIE HARVEY, CPA Contract Services Manager SH: BJO "!# ! EXHIBIT B-6 Fee Estimate Amendment No. 6 to CAG-20-031 City of Renton Rainier and Oakesdale Stormwater Pump Stations Alternatives and Feasibility Evaluation Rainier SWPS Services During Construction May-26 Description Total Hours Total RH2 Labor Total RH2 Expense Total Cost Task 11 Services During Construction 196 45,940$ 3,060$ 49,000$ 11.1 Maintain communications and provide invoices 8 1,928$ -$ 1,928$ 11.2 Review shop drawings and catalog submittals 56 12,410$ 825$ 13,235$ 11.3 Attend weekly construction meetings 30 7,860$ -$ 7,860$ 11.4 Provide part-time construction observation 40 9,672$ 1,360$ 11,032$ 11.5 Coordinate and attend testing and startup 40 9,488$ 517$ 10,005$ 11.6 Prepare record drawings 22 4,582$ 358$ 4,940$ PROJECT TOTAL 196 45,940$ 3,060$ 49,000$ \\corp.rh2.com\projects\Project\Data\REN\119-215\00 Contract\Amend No. 6\Amnd_No. 6_EXH B-6_FEE_Rainier SWPS SDC 5/11/2026 10:58 AM "!# ! 1 5/11/2026 11:01:00 AM \\corp.rh2.com\projects\Project\Data\REN\119-215\00 Contract\Amend No. 6\Amnd_No. 6_EXH C-6_Schedule_Rainier SWPS SDC.docx Exhibit C-6: Time Schedule of Completion City of Renton Rainier and Oakesdale Stormwater Pump Stations Alternatives and Feasibility Evaluation Amendment No. 6 to CAG-20-031 Services During Construction ANTICIPATED NOTICE TO PROCEED DATE: May 2026 Task Anticipated Completion Task 11 – Services During Construction December 2026 ANTICIPATED CONTRACT COMPLETION DATE: December 2026 "!# !