STANTEC CONSULTING SERVICES, INC. (4)

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QC program paired with City review of the progress submittal packages will minimize construction conflicts and reduce redesign efforts. More specific considerations that will be prioritized during the detailed design include standardization, nuisance noise reduction, and construction schedule optimization. Stantec's recent and on -going experience with the design and construction of four IX groundwater treatment facility sites under the OCWD on -call contract has provided us with valuable lessons learned and insight needed to focus on these specific design considerations and the City's preferences, as follows: + Standardization: Since the City already has multiple IX wellhead treatment projects underway with the OCWD on -call contract, standardization of the equipment to minimize spare parts inventory and simplify the City's 0&M will be a high priority for the design of future IX treatment systems. However, Stantec recognizes that sole -sourcing major equipment for the sake of standardization can result in less competitive pricing from vendors. To keep equipment costs as competitive as possible and still achieve a reasonable level of standardization, we will explore equivalent products with compatible consumable and/or wearable components. One example would be researching alternative manufacturers for the cartridge filter housing that use the same size and style filter elements. Additionally, limiting the types and pre - approved manufacturers of mechanical equipment, such as valves, pumps, and special fittings will also be explored. By narrowing the field of pre -approved manufacturers and prioritizing the compatibility of components, we can optimize the relationship of equipment standardization and market competition to balance competitive capital costs with minimal 0&M inventory and expenses. Similarly, it is important that the design conforms with the City's standard design guidelines and construction details to simplify 0&M and help ensure compatibility with existing City systems. + Nuisance Noise Reduction: Many of the City's well sites are located in public areas and/or near residential properties. The addition of equipment —such as pumps, motors, and generators —may produce nuisance noise. We will design noise barriers (screening walls), sound attenuating enclosures, and other acoustical dampening systems that will meet the City's municipal code requirements at the property line. Addressing noise reduction will help prevent complaints from adjacent residents and will reduce the amount of attention drawn toward the facility's operation. + Construction Schedule Optimization: To prevent the need to augment the City's water supply with expensive imported water The current, and rapidly growing, list of notification and response levels necessitates prompts speedy action by the City. Selected design consultant(s), and contractor(s) will Proven Local Expe City's Well31 design concept rendering Santa Ana Well 27 & 28, 31, and 38 PFAS Treatment —in design • Creative layout alternatives to optimize the space -limited sites • Rapid mobilization of local staff to the site as needed to tailor design to existing infrastructure • Integration of new onsite hypochlorite systems Santa Ana Well 40 PFAS Treatment —under construction • Navigated various stakeholder input and requirements—OCWD, residential HOA, and City Parks Department • Quick response to changes during design and construction (e.g. emergency generator, electrical infrastructure) LADWP San Fernando Groundwater Remediation • Managed complex progressive design - build project on -time and on -budget • Procured GAC pressure vessels and media • Integrated design and construction into urban, space -limited site while maintaining continuous operations South Pasadena Graves Reservoir Treatment • Successful implementation into a space - limited site in residential neighborhood • Prepared engineering report to obtain DDW permit amendment to operate City of Santa Ana On -Call Engineering Design Services For PEAS Treatment Systems REP NO. 22-133 11