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HomeMy WebLinkAbout08.f EDB SA No. 1 CDM for Saratoga Wells EXECUTIVE SUMMARY AGENDA ITEM: Proposed Supplemental Agreement(SA)No. 1 with CDM Smith,Inc. (CDM)for Saratoga Springs Water Treatment Plant Wells SS-1 and SS-2 Investigation Support. Project Number: 1128-003 Date: August 30,2024 BACKGROUND: CCUA staff requests approval of SA No. 1 with CDM to provide Professional Engineering Services for Saratoga Springs Water Treatment Plant Wells SS-1 and SS-2 Investigation Support. CCUA recently built and commissioned a new water treatment plant along with a reclaimed water storage and pumping facility on a five-acre property in the Saratoga Springs area to serve the growing area. This facility features two new production wells, SS-1 and SS-2, and a reclaimed water supplemental well, J-SS. During initial startup, there was an occurrence of orange-colored discharge containing orange to grayish sediment or precipitant, especially from SS-1, during the first few minutes the pump was put into service. The discharge tends to clear up after approximately five minutes of operation but has persisted on startup after being off for some time. This precipitate material(rust material) is unusual from a well, and not typically noted by our staff, our consultant, or the well driller at other sites. SCOPE OF WORK: CCUA staff have consulted with the well driller Complete Services and the Engineer of Record, CDM. The cause is thought to be chlorinated lube line water travelling down the well and rusting the casing during low demand periods — i.e. when the well is off for extended periods. Both recommended a limited operational and biological sampling investigation to determine the root cause of the issue. Staff worked with CDM on the resulting scope of work that focuses on limited sampling, operational modifications to isolate the lube line as a potential issue, and sampling to indicate if there are biological or chemical factors deep in the aquifer formation that are contributing to the issue. The work can be completed in less than 3 months.The CDM hydrogeologist will meet with CCUA staff twice during the investigation and will prepare a summary technical memorandum. Should this initial plan fail to identify and resolve the issue, CDM will expand the scope and budget systematically with enhanced measures that could include specialized water quality sampling for bacteria, extracting pumps to add foot valves and replace bushings on the shaft(if needed), video logging the wells, and disinfecting the wells. At this time, the well driller and the CDM do not believe these additional measures will be necessary. BUDGET Staff negotiated the proposal with CDM. The work will be conducted on a time and materials basis, for a cost not to exceed $30,000. This work was not expected or budgeted because this investigation is operational in nature, we intend to use funds budgeted for sub-contractors in the Water Treatment Department Operations Budget. The Water Treatment Department currently has $975,200.00 budgeted funds available to complete the project. CCNA: CCNA, F.S. s. 287.055, does apply to the use of a consultant under continuing services contract. Staff negotiated this Supplemental Agreement in compliance with F.S. s. 287.055. Staff and the consultant negotiated this study scope and fee, based on established contract rates, for the professional services at a compensation which CCUA determines is fair, competitive, and reasonable. The contract fee for this work is below the CCNA contracting threshold of$500,000 for individual studies. RECOMMENDATION: Staff respectfully recommends board approval of SA No. 1 with CDM for a not to exceed amount of $30,000.00 to provide Saratoga Springs Water Treatment Plant Wells SS-1 and SS-2 Investigation Support. ATTACHMENTS: Supplemental Agreement No. 1 CDM Scope and Fee Proposal Supplemental Agreement No. 1 to the Professional Engineering Services Agreement 23/24-A01 to provide Professional Engineering Services for Saratoga Springs Water Treatment Plant Wells SS-1 and SS-2 Investigation Support. CCUA Project No. 1128-003 Engineer: Leslie S. Samel Owner: Clay County CDM Smith, Inc. Utility Authority 4651 Salisbury Road, Suite 420 Jacksonville, FL, 32256 Date: September 3, 2024 Item: Description of Services: Original Provide professional engineering services as Agreement requested and identified in the attached scope of services and fee proposal. Time and Materials Not to Exceed Without Prior Authorization $30,000.00 This document, along with the Scope and Fee Proposal, shall become an amendment to the Professional Engineering Services Agreement and all provisions of the Agreement will apply hereto. Accepted by: Date: Engineer: Leslie S. Samel PE, BCEE CDM Smith, Inc. Accepted by: Date: Owner: Jeremy D. Johnston, P.E., MBA, Executive Director Clay County Utility Authority CLAY COUNTY UTILITY AUTHORITY CIVIL AND ENVIRONMENTAL CONTINUING SERVICES RFQ 2023/2024-A01 August 27, 2024 SUPPLEMENTAL AGREEMENT NO. 1 SARATOGA SPRINGS WELLS SS-1 AND SS-2 INVESTIGATION SUPPORT This Authorization, when executed, shall be incorporated in, and become part of the Agreement for Professional Services between Clay County Utility Authority (AUTHORITY), and CDM Smith Inc. (CONSULTANT), dated August 27, 2024, hereafter referred to as the Contract. BACKGROUND The Authority manages and maintains water, wastewater, and reclaimed facilities throughout Clay County.To address the growing demand from water and reclaimed service customers in this area, the Authority recently built a new water treatment plant along with a reclaimed water storage and pumping facility on a five-acre property in the Saratoga Springs area.This facility features two new production wells, SS-1, and SS-2, each designed for a capacity of 1,800 gallons per minute (gpm). Additionally, a reclaimed water supplemental well,J-SS, was designed and constructed with a 1,200-gpm capacity. During initial startup, there was an occurrence of orange-colored discharge containing orange to grayish sediment or precipitant, especially from SS-1.The discharge tends to clear up after approximately five minutes of operation. On August 19, 2024, CONSULTANT and Complete Services, the well driller,visited the WTP site and discussed the issue with Authority staff. CONSULTANT and others have hypothesized that oxidation within the well might be converting ferrous iron to ferric iron, resulting in the cloudy and reddish-brown substances observed.The cause may be related to excessive amounts of chlorinated lube-line water traveling down the casing during low use periods or may be related to some geochemistry occurring in the well formation, or to other causes. The Authority has asked CONSULTANT to evaluate the situation and provide an operations plan to assist in identification of the causes and recommend phased solutions if needed. SCOPE OF SERVICES TASK 1—INVESTIGATIVE SUPPORT The following tasks describe the scope of services to be performed for the AUTHORITY. • Consultant will develop a sampling plan to help characterize the forms of bacteria in the cloudy initial discharge and develop a sampling plan for CCUA to characterize the discharge as wells are rotated to assist in diagnosing the issue. • CONSULTANT will develop an operations plan for the wells to identify the causes and provide solutions for iron oxidation and the resulting discoloration and precipitate. This plan will specify details such as operational rotation of the wells, when to operate the lube lines, and samples to be taken when putting a well into rotation. • CONSULTANT will evaluate available well operational data, including flow rates, duration, rotation, and near future upcoming demands. • CONSULTANT will evaluate the pump/shaft bushing design to see if lubrication water is needed and assess requirements for a foot valve design and/or bearing changeout to eliminate Lube Water if operational adjustments alone will not resolve the issue. Should this initial plan fail to identify and resolve the issue, CONSULTANT will expand the scope and budget systematically with enhanced measures: including specialized water quality sampling for bacteria, extracting pumps to add foot valves and replace bushings on the shaft (if needed),video logging the wells, and disinfecting the wells. TASK 2—PROJECT AND QUALITY MANAGEMENT Activities performed under this task consist of those general functions required to maintain the project on schedule, within budget, and that the quality of the work products defined within this scope of services is consistent with CONSULTANT'S standards and AUTHORITY's requirements.Specific activities include project quality review of deliverables, and general administration of this Supplemental Agreement. Conference calls and onsite meetings will be held as needed to discuss the information and team members to provide feedback on the findings. ASSUMPTIONS 1. The Authority will provide CONSULTANT with the operational data requested. 2. The operational plan provided by CONSULTANT will be executed and documented by the Authority staff. Results will be made available to CONSULTANT. 3. CONSULTANT will provide recommendations to the Authority based on the results of the operational plan, with additional scope added if needed. TIME OF COMPLETION/SCHEDULE It is anticipated that the work will take up to 12 weeks to complete, starting within two weeks of receipt of a formal notice to proceed (NTP). CONSULTANT will meet with AUTHORITY staff virtually or in person twice during the diagnostic work and will document findings in a Technical Memorandum on completion of the work. COMPENSATION AND PAYMENT CONSULTANT will complete the work described in this Supplemental Agreement on a time and materials basis not to exceed $30,000. Invoices will be submitted monthly based on labor hours at the contractual billing rate plus other direct costs, as defined in our agreement for continuing professional services.This upper limit will not be exceeded without prior written authorization by the AUTHORITY.