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HomeMy WebLinkAboutCORRESPONDENCE - RFP - P839 ARCHITECT & ENGINEERING SERVICES AT OPERATION SERVICES (5)Administrative Services Purchasing Division FACILITIES ARCHITECTURAL & ENGINEERING WORK ORDER CONTRACT PROPOSAL NO. P - 839 INVITATION TO PROPOSE The City of Fort Collins is requesting proposals from firms interested in providing Architectural and Engineering services to the Operations Services Department on an as -needed basis. Any City Department may use these services, but all requests for work should be initiated through the Operations Services Department. The City intends to enter into two (2) Work Order Contracts through this RFP. The firms selected to provide these services will be required, to provide a wide range of professional services, to meet the City's needs. The City of Fort Collins is piloting an e-procurement system for the next 30 days. As a result all of the Cities' solicitations will be available at www.sicomm.net. This service will be free to you during this pilot program. To receive this solicitation please sign up at the website www.sicomm.net, or call 1.800-575-9955, select option #2, and tell the Sicomm representative you are a vendor and would like to sign up with the City of Fort Collins. Please make sure you sign up for commodity number 906-07. Written proposals, five (5) copies, will be received at the Office of Purchasing and Risk Management, 215 N. Mason Street, P.O. Box 580, Fort Collins, Colorado 80522. Proposals will be received on or before 3:00 P.M. (our clock), MAY 23, 2002. Questions concerning the scope of this proposal should be directed to Stephen Seefeld, CCCA, Facilities Project Manager, Operations Services Department, (970) 221-6227. Questions regarding proposal submittal or the proposal process should be directed to John Stephen, CPPB, Senior Buyer, 970-221-6775. Sales Prohibited / Conflict of Interest: No officer, employee, or their dependent or person residing in and sharing the expenses of their household, shall have a financial interest in the sale to the City of any real or personal property, equipment, material, supplies, or services. This rule also applies to subcontracts with the City. This shall not apply to members of any authority, board, committee or commission of the City, other than the members of the City Council. Soliciting or accepting any gift, gratuity, favor, entertainment, kick -back or any items of monetary value from any person who has sought or is seeking to do business with the City of Fort Collins is prohibited. Any vendor knowing of this type of activity is encouraged to report in confidence to the Director of Purchasing and Risk Management, the Director of Finance, the City Attorney, or the City Manager so the matter can be dealt with. Collusive or Sham Proposals: Any proposal deemed to be collusive or a sham proposal will be rejected and reported to the relevant authorities as such. Your authorized signature on your proposal submittal assures that such proposal is genuine and is not a collusive or sham proposal. 215 North Mason Street - 2nd Floor - P.O. Box 580 - Fort Collins, CO 80522-0580 - (970) 221-6775 - FAX (970) 221-6707 5. Constructability Review: Prior to the completion of final design by the Professional, and prior to the acceptance of final design by the City Representative, the Professional shall be required to perform a "Constructability Review" pursuant to the City of Fort Collins Operations Services Department requirements, Building Design Standards, and also to evaluate the actual constructability of the design or services rendered with the City Representative. 6. Work Order Cost Proposals: If requested by the City Project Representative, proposed costs and services shall be submitted in spreadsheet format, detailed as to all architectural/engineering and other disciplines, with estimated hours for each discipline, and their respective current hourly rates illustrated. Proposed reimbursable shall be shown separately and likewise delineated. 7. Coordination: Professional(s) awarded a contract pursuant to this RFP will be required to cooperate with, coordinate scheduling with, and work closely with other City professional - service contractors. 8. Building Code: Drawings and Specifications must meet or exceed and be compatible with Fort Collins Building Code requirements. Certified Drawings must be stamped with the appropriate Colorado Professional's Stamp. 9. Submission/Transmission of Specifications and Drawings: The design Professional will transmit job specifications and drawings to the City in electronic format as well as hard copy. Drawings must be submitted on standard three -and -one-half inch (3'/2°) high -density personal -computer diskettes, zip disks, or CD's in a data format fully compatible with AutoCAD 2002. Bid sets and as -recorded documents (specs and drawings) may be transmitted in "read only" format. However, the City shall have the right to keep electronic copies of the drawings that can be manipulated for future maintenance changes, upgrades and/or alterations. The City agrees not to reproduce the drawings and/or the specifications in full, for construction replication. The design Professional agrees not to reproduce the drawings and/or the specifications in full, for construction replication without the written consent of the City. 10. File Compatibility: The design Professional will title all electronic drawing files and other project submissions to be consistent with the project contract documents. (le. Drawing files labeled according to drawing sheet number of the plotted drawing; and, specification sections labeled according to CSI format and printed project specs.) Submitted files may also include the A/E's project number for their reference. For questions concerning this requirement please contact the Operations Services Acting Contract Administrator or the Operations Services staff Architect. 10 SERVICES AGREEMENT WORK ORDER TYPE THIS AGREEMENT made and entered into the day and year set forth below, by and between THE CITY OF FORT COLLINS, COLORADO, a Municipal Corporation, hereinafter referred to as the "City" and Provider". WITNESSETH: hereinafter referred to as "Service In consideration of the mutual covenants and obligations herein expressed, it is agreed by and between the parties hereto as follows: 1. Services to be Performed. a. This Agreement shall constitute the basic agreement between the parties for services for The conditions set forth herein shall apply to all services performed by the Service Provider on behalf of the City and particularly described in Work Orders agreed upon in writing by the parties from time to time. Such Work Orders, a sample of which is attached hereto as Exhibit "A", consisting of _ (_ ) page[s], and incorporated herein by this reference, shall include a description of the services to be performed, the location and time for performance, the amount of payment, any materials to be supplied by the City and any other special circumstances relating to the performance of services. No workorder shall exceed $ . The only services authorized under this agreement are those which are performed after receipt of such Work Order, except in emergency circumstances where oral work requests may be issued. Oral requests for emergency actions will be confirmed by issuance of a written Work Order within two (2) working days. 11 WOSA 10/97 b. The City may, at any time during the term of a particular Work Order and without invalidating the Agreement, make changes within the general scope of the particular services assigned and the Service Provider agrees to perform such changed services. 2. Changes in the Work. The City reserves the right to independently bid any services rather than issuing work to the Service Provider pursuant to this Agreement. Nothing within this Agreement shall obligate the City to have any particular service performed by the Service Provider. 3. Time of Commencement and Completion of Services The services to be performed pursuant to this Agreement shall be initiated as specified by each written Work Order or oral emergency service request. Oral emergency service requests will be acted upon without waiting for a written Work Order. Time is of the essence. 4. Contract Period. [Option 1] This Agreement shall commence upon the date of execution shown on the signature page of this Agreement and shall continue in full force and effect for one (1) year, unless sooner terminated as herein provided. In addition, at the option of the City, the Agreement may be extended for an additional period of one (1) year at the rates provided with written notice to the professional mailed no later than 90 days prior to contract end. 4. Contract Period. [Option 2] This Agreement shall commence 199_, and shall continue in full force and effect until , 199_, unless sooner terminated as herein provided. In addition, at the option of the City, the Agreement may be extended for additional one year periods not to exceed _ (_) additional one year periods. Pricing changes shall be negotiated by and agreed to by both parties and may not exceed the Denver - Boulder CPI-U as published by the Colorado State Planning and Budget Office. Written notice of renewal shall be provided to the Service Provider and mailed no later than 90 days prior to contract end. 12 WOSA 10/97 5. Delay. If either party is prevented in whole or in part from performing its obligations by unforeseeable causes beyond its reasonable control and without is fault or negligence, then the party so prevented shall be excused from whatever performance is prevented by such cause. To the extent that the performance is actually prevented, the Service Provider must provide written notice to the City of such condition within fifteen (15) days from the onset of such condition. 6. Early Termination by City/Notices Notwithstanding the time periods contained herein, the City may terminate this Agreement at any time without cause by providing written notice of termination to the Service Provider. Such notice shall be mailed at least fifteen (15) days prior to the termination date contained in said notice unless otherwise agreed in writing by the parties. All notices provided under this Agreement shall be effective when mailed, postage prepaid and sent to the following address: City Service Provider In the event of early termination by the City, the Service Provider shall be paid for services rendered to the termination date, subject only to the satisfactory performance of the Service Provider's obligations under this Agreement. Such payment shall be the Service Provider's sole right and remedy for such termination. 7. Contract Sum. This is an open-end indefinite quantity Agreement with no fixed price. The actual amount of work to be performed will be stated on the individual Work Orders. The City makes no guarantee as to the number of Work Orders that may be issued or the actual amount of services which will in fact be requested. No Work Order of or more shall be issued. 13 WOSA 10/97 8. Payments. a. The City agrees to pay and the Service Provider agrees to accept as full payment for all work done and all materials furnished and for all costs and expenses incurred in performance of the work the sums set forth for the hourly labor rate and material costs, with markups, stated within the Bid Schedule Proposal Form, attached hereto as Exhibit "B", consisting of _ (_) page[s], and incorporated herein by this reference. b. Payment shall be made by the City only upon acceptance of the work by the City and upon the Service Provider furnishing satisfactory evidence of payment of all wages, taxes, supplies and materials, and other costs incurred in connection with the performance of such work. 9. City Representative. The City's representative will be shown on the specific Work Order and shall make, within the scope of his or her authority, all necessary and proper decisions with reference to the work requested. All requests concerning this Agreement shall be directed to the City Representative. 10. Independent Contractor. It is agreed that in the performance of any services hereunder, the Service Provider is an independent contractor responsible to the City only as to the results to be obtained in the particular work assignment and to the extend that the work shall be done in accordance with the terms, plans and specifications furnished by the City. 11. Personal Services. It is understood that the City enters into the Agreement based on the special abilities of the Service Provider and that this Agreement shall be considered as an agreement for personal services. Accordingly, the Service Provider shall neither assign any responsibilities nor delegate any duties arising under the Agreement without the prior written consent of the city. 14 WOSA 10/97 12. Acceptance Not Waiver. The City's approval or acceptance of, or payment for any of the services shall not be construed to operate as a waiver of any rights under the Agreement or of any cause of action arising out of the performance of this Agreement. 13. Warranty. (a) Service Provider warrants that all work performed hereunder shall be performed with the highest degree of competence and care in accordance with accepted standards for work of a similar nature. (b) Unless otherwise provided in the Agreement, all materials and equipment incorporated into any work shall be new and, where not specified, of the most suitable grade of their respective kinds for their intended use, and all workmanship shall be acceptable to City. (c) Service Provider warrants all equipment, materials, labor and other work, provided under this Agreement, except City -furnished materials, equipment and labor, against defects and nonconformances in design, materials and workmanship/workwomanship for a period beginning with the start of the work and ending twelve (12) months from and after final acceptance under the Agreement, regardless whether the same were furnished or performed by Service Provider or by any of its subcontractors of any tier. Upon receipt of written notice from City of any such defect or nonconformances, the affected item or part thereof shall be redesigned, repaired or replaced by Service Provider in a manner and at a time acceptable to City. 14. Default. Each and every term and condition hereof shall be deemed to be a material element of this Agreement. In the event either party should fail or refuse to perform according to the terms of this agreement, such party may be declared in default thereof. 15. Remedies. In the event a party has been declared in default, such defaulting party shall be allowed a period of ten (10) days within which to cure said default. In the event the default remains uncorrected, the party declaring default may elect to (a) terminate the Agreement and seek damages; (b) treat the Agreement as continuing and require specific performance; or (c) avail himself of any other remedy at law or equity. If the non -defaulting party commences legal or equitable actions against the defaulting party, the defaulting party 15 WOSA 10/97 shall be liable to the non -defaulting party for the non -defaulting party's reasonable attorney fees and costs incurred because of the default. 16. Binding Effect. This writing, together with the exhibits hereto, constitutes the entire agreement between the parties and shall be binding upon said parties, their officers, employees, agents and assigns and shall inure to the benefit of the respective survivors, heirs, personal representative, successors and assigns of said parties. 17. Indemnity/Insurance. a. The Service Provider agrees to indemnify and save harmless the City, its officers, agents and employees against and from any and all actions, suits, claims, demands or liability of any character whatsoever, brought or asserted for injuries to or death of any person or persons, or damages to property arising out of, result from or occurring in connection with the performance of any service hereunder. b. The Service Provider shall take all necessary precautions in performing the work hereunder to prevent injury to persons and property. c. Without limiting any of the Service Provider's obligations hereunder, the Service Provider shall provide and maintain insurance coverage naming the City as an additional insured under this Agreement of the type and with the limits specified within Exhibit "D", consisting of (_) page[s], attached hereto and incorporated herein by this reference. The Service Provider before commencing services hereunder, shall deliver to the City's Director of Purchasing and Risk Management, 256 West Mountain Avenue, Fort Collins, Colorado 80521 one copy of a certificate evidencing the insurance coverage required from an insurance company acceptable to the city. 18. Entire Agreement. This Agreement, along with all Exhibits and other documents incorporated herein, shall constitute the entire Agreement of the parties. Covenants or representations not contained in this Agreement shall not be binding on the parties. 16 WOSA 10/97 19. Law/Severability. This Agreement shall be governed in all respect by the laws of the State of Colorado. In the event any provision of this Agreement shall be held invalid or unenforceable by any court of competent jurisdiction such holding shall not invalidate or render unenforceable any other provision of this Agreement. 20. Special Provisions. [Optional] Special provisions or conditions relating to the services to be performed pursuant to this Agreement are set forth in Exhibit _, consisting of (_) page[s], attached hereto and incorporated herein by this reference. 17 WOSA 10/97 ATTEST: City Clerk APPROVED AS TO FORM: Assistant City Attorney CITY OF FORT COLLINS, COLORADO a municipal corporation 0 John F. Fischbach City Manager By: James B. O'Neill II, CPPO, FNIGP Director of Purchasing and Risk Management Date: [INSERT CORPORATIONS NAME] or [Insert Partnership name] or [Insert individual's name] Doing business as [Insert name of business] PRINT NAME CORPORATE PRESIDENT OR VICE PRESIDENT Date: ATTEST: (Corporate Seal) CORPORATE SECRETARY is EXHIBIT "A" WORK ORDER FORM PURSUANT TO AN AGREEMENT BETWEEN THE CITY OF FORT COLLINS AND DATED: Work Order Number: Purchase Order Number: Project Title: Commencement Date: Completion Date: Maximum Fee: (time and reimbursable direct costs): Project Description: Scope of Services: Service Provider agrees to perform the services identified above and on the attached forms in accordance with the terms and conditions contained herein and in the Services Agreement between the parties. In the event of a conflict between or ambiguity in the terms of the Services Agreement and this work order (including the attached forms) the Services Agreement shall control. Service Provider Acceptance 19 The attached forms consisting of _ (J pages are hereby accepted and incorporated herein by this reference, and Notice to Proceed is hereby given. City of Fort Collins By: Date: The City of Fort Collins reserves the right to reject any and all proposals and to waive any irregularities or informalities. Sincerely, Ja es B. O'Neill II, CPPO, FNIGP rector of Purchasing &Risk Management 2 GENERAL INFORMATION The City of Fort Collins is requesting Architectural/ Engineering team proposals to assist the City's Operations Services Department, in its yearly need for professional building and site design services in planning, architectural design, engineering to include; civil, structural, mechanical, electrical, electrical service, lighting, energy conservation services, and professional land surveying. In addition the professional group selected may be asked to include an architectural or engineering specialist to the team on a case by case basis. The hourly rate for any specialist will be reviewed and approved before work is assigned. Performance of these services will be based upon the City of Fort Collins Operations (Facility) Services Department Building Design Standards. Any deviation from these standards must be approved in advance by the City Project Representative. The Design Standards Notebook is available for review at the Operations Services Department, 117 North Mason Street, Fort Collins. Desired services may include, but are not necessarily limited to: ♦ site analysis ♦ space planning and management ♦ concept design ♦ design development ♦ construction documents ♦ feasibility studies ♦ cost estimating ♦ construction contract administration ♦ systems assessment and reports ♦ energy conservation studies ♦ energy conservation project development Software: The City Operations Services Department uses AutoCAD-Release 2002. Therefore, the Professional firm(s) must have the capability of providing appropriate drawings in a format which is fully compatible with and can be read by AutoCAD-Release 2002. Drawings must be supplied in both 3.5 floppy diskette format, zip disk or CD's and Mylar hard copy format. Specifications must be supplied in either 3.5 floppy diskette format, zip disk or CD's. For space management, the City uses "FM:Space-Management" software by FM:Systems. Operations Services Actina Contract Administrator: Point of contact for this contract is Stephen Seefeld, CCCA, Facilities Project Manager @ (970)-221-6227. Previous Work Value: The current Architectural & Engineering contract for the Operations Services Department expires June 30, 2002. Contract dollar value for the previous two-year period (2000-2001) was approximately $335,000. 3 Request for Proposal Content: Please include in your proposal, and be prepared to demonstrate to the City of Fort Collins, such items as: Your team's capabilities regarding staff ,and associates, experience and training. Availability to handle multiple projects in the maximum Work Order dollar range of 50K. Ability/willingness to meet fast -track schedules and deadlines. Your past successes and customer satisfaction level. Any problems you've encountered that were solved by your group through innovation. Your particular design strengths, interests and design philosophy. Your teams' commitment to quality and attention to detail. Experience in construction contract administration procedures, in the role of the A/E, as defined by the AIA, EJCDC, and CSI. Your ability to provide efficient, competent service, keeping design cost overruns to a minimum. Your interest in being awarded this contract. Provide a list of projects completed in the last three years with all pertinent contact information for reference checks. EVALUATION AND AWARD It is the intent of the City to select two (2) Professional architectural / engineering firms or teams, and to enter into a Professional Services Agreement with each to provide the services specified herein. A City Review Committee will rank the proposals based on the City of Fort Collins' procedures for the review of professional firms. The highest -ranked Professional teams will then be invited to make a formal oral presentation to the City Review Committee. Based on these interviews, the two (2) highest ranked Professional teams will be retained to provide their services to the City, in accordance with their ranking, as the need for work is generated. If the City determines that the highest ranked firm cannot meet the required time schedule, or a conflict of interest exists, or the work to be performed is not within the scope of the capabilities of that company and/or any applicable subconsultants, the second -highest -ranked Professional team with whom the City has contracted will be considered for the work. The Professional Services Agreement shall commence on July 1, 2002 and continue in full force and effect for one year. At the option of the City, the Professional Services Agreement may be extended for up to four (4) additional one-year terms. 4 Increases in the Fee Schedule may be negotiated for subsequent renewal of the third, fourth, and fifth additional one-year periods. Price changes in the Fee Schedule will be negotiated by and agreed to by both parties and any increases shall not exceed the Denver -Boulder CPI index. III. WORK ORDER PROCEDURES Work performed pursuant to the Professional Services Agreement may be authorized by Work Order. Signed work orders must be issued for work over $30,000 but less than the $50,000. No Work Order shall exceed $50,000. The Professional shall provide all personnel, equipment and supplies necessary to complete the professional services set forth in the Scope of Work. Total project time, any retainage clause, and any applicable liquidated damages clause will be determined as part of the project Work Order for each individual project. This is an indefinite quantity Work Order contract with no fixed price. The actual amount of work to be performed, the time of such performance, and the location of work will be determined by the City Representative, who may issue Work Orders to the Professional. The only work authorized under the Professional Services Agreement is that which is performed after receipt of such Work Orders. The City of Fort Collins retains the right to reject all proposals and re -solicit through the formal process, if deemed to be in the best interest of the City. Development of the Scope of Work: the Professional and the City Project Representative will develop The Scope of Work for each individual project during the Work Order process. The design Professional will submit a detailed scope of work proposal to the client for review and approval. After review and approval, the City Representative will issue the notice to proceed to the Professional with appropriately endorsed Work Order. IV. FEE REQUIREMENTS For this Request for Proposal, the Professional team will be required to provide hourly rate pricing for, at least, the following categories: 1. Architectural Design - a.) Interior/Exterior b.) Site Planning/Space Planning 2. Landscape Architecture 3. Architectural Historical Preservation Specialist 4. Structural Engineering 5. Mechanical Engineering 6. Electrical Engineering 7. Civil Engineering 8. Lighting Consulting 9. Acoustical Engineering 10. Energy Consulting 11. Construction Estimating 12. Professional Land Surveyor Each Work Order issued pursuant to the Architectural & Engineering contracts will typically be based upon an hourly rate or set of rates with a not -to -exceed maximum fee; or a fixed fee agreement. The specific compensation agreement for each Work Order is negotiated at the time the Work Order is awarded to the Professional, based upon the provisions of the Professional Services Agreement. The Fee Schedule hourly rates (and any direct and reimbursable costs), as provided in the Proposal and negotiated for the Agreement, will be used for each Work Order. The appropriate Fee Schedule hourly rates will be multiplied by an estimate of time for each discipline. The estimate of time as well as the scope of services may be negotiated at the time the work order is awarded. As a requirement of this RFP, the Proposer (Professional team) shall list the hourly rates for each discipline , and any proposed direct and reimbursable costs. The Professional is requested to also list any other related or ancillary services available, with the fee structure for each. The Fee Schedule for the awarded Professional group will be incorporated into the Professional Services Agreement as Exhibit B, pursuant to Agreement Paragraph 7, "Compensation". Fee Structure: For each discipline, show the individual hourly rates according to each firm's specific categories of service. Example: A/E (firm): Drafts Person /hour Principal /hour Clerical /hour Project Arch/Eng /hour CAD Technical /hour In addition, provide rates for typically proposed direct or reimbursable charges, such as Mileage, Travel Time and/or Per Diem. V. REVIEW AND ASSESSMENT Professional firms will be evaluated on the following criteria. These criteria will be the basis for review of the written proposals. The rating scale shall be from 1 to 5, with 1 a poor rating, 3 an average rating, and 5 an outstanding rating. H Weighting Qualifications Standard Factor 2.0 Scope of Does the proposal show an understanding of the project Proposal objectives, methodology, and requirements? Has the firm demonstrated innovative professional approaches to problem -solving? 2.0 Assigned Do the persons who will work on the contract have the Personnel necessary skills? Are sufficient people of the requisite skills assigned to the contract? 1.0 Availability Can the work be completed in the time frame required? Can targeted start- and completion dates be met? Can qualified staff be made available as needed? Does the senior staff have adequate time available? What is the ratio of senior staff to junior staff? 1.0 Motivation Is the firm interested in the work? Are they committed to successful performance and completion of the contract? 2.0 Costs Is the company cost -competitive and cost-effective? Are they capable of controlling their costs and meeting on - time performance? 2.0 Capability of the Does the firm have the technical experience, quality Firm assurance and quality control procedures, and staff to perform the contract? Can the firm provide special expertise, additional staff, or specialized subconsultants for this contract? Has the firm previously performed the type and full range of services required? VI. REFERENCE EVALUATION (TOP -RANKED FIRMS) The City's Representative will check references using the following criteria. The evaluation rankings will be labeled Satisfactory / Unsatisfactory. QUALIFICATION STANDARD Overall Performance Would you hire this Professional again? Did they show the skills required by this project? Timetable Was the original Scope of Work completed within the specified time? Were interim deadlines met in a timely manner? Completeness Was the Professional responsive to client needs; did the Professional anticipate problems? Were problems solved quickly and effectively? Budget Was the original Scope of Work completed within the project budget? Job Knowledge a) If a study, did it meet the Scope of Work? b) If Professional administered a contract with another contractor, was the project properly completed? Were problems corrected quickly and effectively? H EXHIBIT "C" SPECIAL CONDITIONS 1. Administration: The amount of CA (Contract Administration) shall be determined on a case by case basis. CA shall be detailed in the proposal based upon the Scope of Work developed. Typical services the Professional may be required to perform include: review of construction contract project pay estimates, review submittals, process change orders, attend scheduled progress meetings, and develop required "change in work requests" (CWR's), construction observation, and inspection at substantial completion. The cost associated with this service for a specific project will be a maximum not -to -exceed price, negotiated at the time of the Work Order fee determination using the hourly rates in the Professional Fee Schedule, as set forth in Exhibit "B". 2. Construction Observation: The Professional will submit a written report to the City Representative after each observation visit and also upon inspection at substantial completion. The report will address, but is not limited to, construction work done according to plans and specifications, estimation of work progress, noted defects of material, equipment, or workmanship. Report that the work complies with the design specifications, meets industry standards, and attention is given to the fit and finish of the project. 3. Requirements for Registration: The design of architectural, structural, mechanical, electrical, civil, or other engineering work shall be accomplished or reviewed and approved by architects or engineers registered in Colorado to practice in the particular professional field involved. 4. Changes: a) The City's Representative may, at any time by written order, make changes within the general scope of the Work. b) If any such change causes: an increase or decrease in the cost of, or the time required for performance of any part of the work under the Work Order, the City Representative shall, pursuant to the Professional's request, make an equitable adjustment in the price, the work schedule, or both. c) The Professional must submit in writing any "proposal for adjustment" under this clause within 15 days from date that a written change in work is issued by the City Representative. d) No services for which an additional cost will be charged by the Professional shall be furnished without the prior written authorization of the City Representative. W