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Home My WebLink AboutC2017-560 - 11/16/2017 - NA CITY OF CORPUS CHRISTI AMENDMENT NO. 1 CONSTRUCTION MATERIALS TESTING The City of Corpus Christi, Texas hereinafter called "City", and Tolunay-Wonq Engineers, Inc. hereinafter called "Engineer", agree to the following amendments to the Contract for Engineering Services for Tuloso Road from IH 37 to Leopard Street BOND 2012 (Project No. E12094) as authorized and administratively amended by: { Original Contract May 11, 2016 Administrative Approval $15,888 • Exhibit "A", shall be amended to include additional tasks as described in the attached Amendment No. 1, Exhibit"A". Fees shall be amended as per the attached Amendment No. 1, Exhibit "A", for a fee not to exceed $11,213, for a total restated fee not to exceed $27,101. All other terms and conditions of the May 11, 2016 contract between the City and Engineer, and of any • amendments to that contract, which are not specifically addressed herein shall remain in full force and effect. CIV-' %P-P = = I TOLUNAY-WONG ENGINEERS, INC. o z-, • , !E /7 -. IL (2444 Je• H. Edmonds, P. E., ate Don R. Rokohl, P. E., Date Director of Engineering Services Branch Manager 826 South Padre Island Drive Corpus Christi, TX 78416 R' • • ME D D (361)884-5050 Office 'I l' N` 11 I ( 17 drokohl@tweinc.com Vale e H. Gra P.E. Date Exe' tive Direct.rof 'ublic Works • • APPROVED AS TO LEGAL FORM • 11/10/17 • Legal Depa m-• Date • ) { 2017-560 11/16/1'7 SNG ET\E12 N1 LO Ocri IH 3/10:.EOPARU BOND ISSUE 2C 121TESTING AMENDMENT NO 1 TOLUNAY %ONG/E12094 Tolunay-Wong Engineers Inc. INDEXED Project No. E12094 Accounting Unit 3549-051 Account 550920 Activity E12094-01-3549-EXP Account Category 50920 Fund Name Street CIP GO BOND 2012 AMD. NO. 1 Page 2 of 2 H ENGINEERING DATAEXCHANGE\VELMAP\STREEI\E12090 TULOSO FROM IH 37 TO LEOPARD BOND ISSUE 20121TESTING AMENDMENT NO 1 TOLUNAY WONG\E12O94 TULOSO RD AMEND 1 TOLUNAY WONG TESTING AMENDMENT NO 1 DOC 110 Tolunay-Wong 826 South Padre Island Drive Engineers Inc. Corpus Christi,Texas 78416 Phone:(361)884-5050 August 30,2017 City of Corpus Christi 1201 Leopard Street Corpus Christi,Texas 78401 (Via e-Mail:ChrisH3@cctexas.com) Phone: (361)826-3527 Attn: Mr.Chris Hale,P.E. Re: Amendment 1 to Revised Proposal Construction Materials Testing Services For: Tuloso Road—Leopard Street to I.H.37 Corpus Christi,Texas City of Corpus Christi Project No.E12094 TWE Proposal No.P15-C088A1 Mr. Hale: Tolunay-Wong Engineers (TWE) appreciates the opportunity to submit our amendment 1 to the revised proposal to provide construction materials testing and inspection services for the above referenced project. The proposed scope of services was based on the testing schedule remaining as provided in an electronic mail transmission, dated August 24, 2017. We understand that upon acceptance of the proposal,the City of Corpus Christi will issue an amendment to the original contract as our authorization for the work. Tolunay-Wong Engineers has established a reputation for excellence in the materials engineering field through a business philosophy based on quality professional services responsive to the needs of our clients. We thank you for the opportunity to serve you with this philosophy and your consideration for this project. Please do not hesitate to contact us, if you have any questions regarding the proposal or if additional information is needed. Respectfully submitted, Tolunay-Wong Engineers,Inc. T 11fL cl..� Don R. Rokohl,P.E. Branch Manager drokohl@tweinc.com DRR/drr AMEND. NO. 1 EXHIBIT"A" Page 1 of 5 Geotechnical Engineering*Environmental Field and Consulting Services*Construction Materials Testing*Deep Foundations Testing Tolunav-Wong August 30,2017 Engineers, Inc. Proposal No.P15-0088A1 o INTRODUCTION TWE understands the importance of this project to the City of Corpus Christi and the special needs associated with construction of a project of this type. Of particular importance is for the overall project team to be comprised of experienced professionals working together toward a common objective. This objective is to obtain a quality project, meeting the intent of the project specifications, as well as completion on schedule and within budget. From our Corpus Christi facility located at 826 South Padre Island Drive, we will provide experienced engineering technicians to perform the on-site testing and inspection services. Additionally, we meet the requirements of ASTM E-329 "Standard Practice for Inspection and Testing Agencies for Concrete, Steel and Bituminous Materials Used in Construction" regarding qualifications of the testing laboratory. Additionally, our Corpus Christi laboratory is accredited in construction materials testing by the American Association for Laboratory Accreditation(A2LA). WORK PLAN TWE's approach to providing materials testing services is to assign qualified engineering technicians, directed by Senior Professional Engineers, experienced in their respective disciplines. Our assigned Project Manager will provide communication, service direction, and overall project coordination. It is presumed that the contractor will be encouraged to provide their own formalized quality control program separate and apart from our acceptance inspection/testing program stated herein. We anticipate providing the majority of the required testing services for this particular project on a "part- time"basis.The anticipated services required on this project are as follows: A. In-Place Soil Compaction(nuclear method) B. Cast In-Place Portland Cement Concrete Inspection/Testing C. Hot Mix Asphalt Concrete Inspection/Testing All reports of materials tests and inspection services provided will be issued to appropriate members of the project team. In the event individual reports indicate potential problems or items of non-conformance to the project specifications,you will be contacted as soon as possible. SCOPE OF SERVICES The specific materials monitoring services and laboratory tests anticipated for this project are as follows: A. In-Place Soil Compaction(Nuclear Method) • The technician will obtain samples of soil, borrow material and/or base materials and deliver them to our laboratory facility for testing. Laboratory testing will include Moisture/Density Relationships,Atterberg Limit determinations and sieve analysis. • The technician will perform in-place compaction testing (nuclear method) at the frequency required by the project specifications to determine the moisture content and degree of compaction. AMEND. NO. 1 EXHIBIT"A" Page 2 of 5 Geotechnical Engineering*Environmental Field and Consulting Services*Construction Materials Testing*Deep Foundations Testing Tolunay-Wong August 30,2017 (Engineers. Inc. Proposal No.P1Pag e 3of5 B. Cast In-Place Portland Cement Concrete Monitoring/Testing • The technician will sample the concrete in order to perform standard field tests and prepare test cylinders and/or beams in accordance with project specifications. The frequency of sampling will also be as directed by the project specifications. Standard field tests include slump, air content and temperature for normal weight concrete and will also include unit weight on all samples of lightweight concrete. • TWE will cure the test specimens and perform compressive strength tests at the age designated by project specifications. • The technician will visually estimate the slump of each load of concrete delivered and perform actual slump tests and other standard field tests when test specimens are prepared, or as necessary to evaluate concrete consistency. • The on-site technician will monitor the concrete temperature, ambient temperature, mixing time, and placement procedures. The technician will also sample concrete at the frequency specified in the project specifications. • The technician will record detailed information regarding the location of the placement, date of the placement,concrete mixture strength requirement and all other pertinent information. C. Hot Mix Asphalt Concrete Inspection/Testing • During lay down of hot mix asphalt concrete, the technician will obtain and record temperature of the mixture and obtain samples for laboratory testing. • After lay down and compaction, the asphalt will be cored to determine and record in-place thickness,%air voids, and laboratory density. The in-place%air voids and in-place theoretical density will be determined from the asphalt cores in the laboratory. • The asphalt samples obtained during lay down will tested in the laboratory for extraction and gradation,laboratory density and stability,and maximum theoretical density(rice method). COST ESTIMATE&GENERAL NOTES In this section of the proposal you will find our cost estimate. Additional services or tests requested and not specifically addressed in this proposal will be invoiced per the standard fees set forth in our 2014 Fee Schedule. Based on the testing schedule provided in the project construction documents (plans) provided to us at this time by Maverick Engineering, Inc. and the anticipated construction schedule, we have established what we believe is the most realistic cost estimate for this project. Please remember that the units stated are only an estimate. Due to factors beyond our control such as weather, unforeseen conditions, contractor expertise, contractor scheduling, etc., the cost of our services may vary from the estimated amount. We estimate the cost of the construction materials testing for our proposed Scope of Services will be $11,213.00 as detailed in the following section, although all services will be invoiced on a time and materials basis. AMEND. NO. 1 EXHIBIT"A" Page 3 of 5 Geotechnical Engineering.Environmental Field and Consulting Services.Construction Materials Testing.Deep Foundations Testing k Tolunav-Wong August 30,2017 A1 Engineers. Inc. Proposal No.P155-C088A5 6 A minimum 4-hour labor equivalent charge is applicable for all field testing and inspection services. Overtime rates for field personnel are applicable for all hours worked in excess of 8 hours per day, weekends, and holidays and are assessed at 1.5 times the standard rates. All field hours will be charged portal to portal from our Corpus Christi laboratory. All sample pick-ups will be charged travel time from portal to portal and will include associated vehicle charges.Administrative costs, Engineering consultation and evaluation in connection with field and laboratory testing services will be charged at a rate of approximately one hour for each 20 hours of field work performed. Our prices include copies of our reports distributed through e-mail in accordance with your instructions. Additional copies mailed at $0.50 per page. Direct expenses incurred in connection with the project will be invoiced at cost plus 15%for handling. Travel and lodging expenses for out of town assignments will be invoiced at cost plus 15% or $125.00 per day, whichever is greater. Our terms are net 30 days upon receipt of invoice. Invoices will be submitted on a monthly basis. AMEND. NO. 1 EXHIBIT"A" Page 4 of 5 Geotechnical Engineering*Environmental Field and Consulting Services*Construction Materials Testing*Deep Foundations Testing • • 10 Tolunay-Wong August 30,2017 Engineers, Inc. Proposal No.P15-C088A1 Page 5 of 5 COST ESTIMATE SUMMARY Description Unit Quantity Rate Extension Soils/Earthwork Field Testing 1 Construction Materials Technician Hr 56 $43.00 $2,408.00 2 Trip Charges Ea 14 $45.00 $630.00 3 Nuclear Density Gauge. Day Ea 14 $50.00 $700.00 Soils Laboratory Testing 4 Standard Proctor Ea 4 $150.00 $600.00 5 Modified Proctor Ea 1 $175.00 $175.00 6 Atterberg Limits Ea 2 $60.00 $120.00 7 Percent Finer Than No. 200 Sieve Ea 2 $40.00 $80.00 8 Sieve Analysis Ea 3 $60.00 $180.00 9 Sample Pick-up Ea 2 $150.00 $300.00 Concrete Field and Laboratory Testing 10 Construction Materials Technician Hr 24 $43.00 $1,032.00 11 Compressive Strength of Concrete Ea 15 $15.00 $225.00 Cylinders 12 Trip Charges Ea 3 $45.00 $135.00 13 Sample Pick-up Ea 1 $150.00 $150.00 HMAC Field and Laboratory Testing 14 I Construction Materials "Technician Hr 16 $43.00 $688.00 15 Extraction/Gradation Ea 4 $225.00 $900.00 16 Lab Density & Stability Ea 4 $185.00 $740.00 17 Theoretical Density (Rice Method) Ea 4 $85.00 $340.00 18 Thickness Cores - In Place Ea 2 $90.00 $180.00 19 Core Bulk Density Ea 2 $50.00 $100.00 20 Asphalt Binder Content Ea 2 $75.00 $150.00 21 Trip Charges Ea 4 $45.00 $180.00 Project Management 22 Project Management, Hr. Ea 8 $100.00 $800.00 23 Administrative Assistant. Hr. Ea 8 $50.00 $400.00 Total Cost Estimate $11,213.00 ASSUMPTIONS: The cost estimate is based on the following assumptions and our experience on similar projects: 1. The testing schedule remaining as provided in an electronic mail transmission from the City of Corpus Christi,dated August 24,2017. AMEND. NO. 1 EXHIBIT"A" Page 5 of 5 Geotechnical Engineering*Environmental Field and Consulting Services*Construction Materials Testing*Deep Foundations Testing