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EEC will implement feedback received during our monthly PFAS meetings over the last two years from Santa Ana engineers and operators. We will also incorporate lessons learned from the site visits to YLWD and Fullerton into the design of Santa Ana treatment systems. Lastly, EEC will involve Santa Ana engineers and operators at every stage of the system design. This holistic and collaborative approach ensures the final system will be operator -friendly and meet Santa Ana's needs. A detailed discussion of our team's approach to system design is spelled out in Section G Scope of Work below. However, several key considerations learned during our previous work with Santa Ana are highlighted below: • Minimize treatment system footprint when possible at park locations to mitigate the taking of public park spaces • Consider truck access for maintenance and media change outs o For example, the treatment system layouts in the Basis of Design Technical Memorandum (BODTM) for Well 38 did not facilitate easy access and would require traffic control and temporary street closures to execute media change outs. Evaluate site drainage for stormwater, but more importantly for the full flushing flow rates of all vessels during commissioning o Flushing drainage was not properly directed to the house -keeping pad inlets at Well 40 which will likely result in nuisance splashing during flushing. o The on -site drainage at Well 40 was not sized properly to convey the full flushing flow during commissioning, likely resulting in on -site or off -site (park) flooding. o Assess 24/7 flushing flows and volumes against OCFCD permits and points of discharge Involve DDW early and often in the design, permitting, commissioning, and treatment media selection processes. Perform a private utility locate survey during design to locate undocumented utilities on site. As-builts are unreliable for many sites. Collaborative effort (involve SA engineers, operators, maintenance) to develop schematic level design drawings identifying major project needs Bid Support and Construction Administration Approach EEC is an experienced design -builder (EEC maintains a Class A HAZ General Engineering Contractor's license), and we are proud that our projects are designed with a focus on constructability. However, questions are always raised during the bidding phase. The EEC Team will assist the City in answering these questions, attend pre -bid conferences and job walks, prepare addendums, and analyze bids to facilitate a fair and effective bidding process. The EEC Team has multiple staff who have expertise in the bidding process and will work closely with the City to ensure the right contractor is chosen. Recently, EEC assisted the City of Santa Ana with the selection of a consultant to implement their Automated Metering Infrastructure (AMI). EEC reviewed proposals submitted by the consultants, attended selection committee meetings, and interviewed potential winners. EEC also assisted the City with overseeing the implementation of the AMI. The EEC Team is available to assist the City with construction management and administration services during the construction phase of City projects. The EEC Team will attend pre -construction conferences, will monitor the construction schedule, and will visit construction sites for progress and quality evaluations. The EEC Team will also assist the contractor, construction manager/contract administrator, and inspector with interpretation of plans and specifications, analysis of changed conditions, development of corrective action, review of shop drawings and other submittals, and the review and negotiation of change orders. The EEC Team has available technicians with decades of Auto -CAD experience to support preparation of as -built drawings when required. EEC Environmental 9 November 17, 2022