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SCOPE OF SERVICES <br /> Task 1 — Pre-Design <br /> 1 . Visit plant site to retrieve copy of existing PLC program, existing HMI program files <br /> and review the existing operating system . <br /> Task 2 — Design Submittals <br /> 1 . Review final design and panel fabricator' s project submittals for the new control <br /> panels to verify completeness of the integration with the new and existing project . <br /> Incorporate IRC staff screen layouts for new post-treatment system . <br /> Task 3 — PLC Design <br /> 1 . Modify the existing PLC5 program to add two caustic tanks and interface to the new <br /> metering pumps, add a new bulk NaOCL tank and interface with a new metering <br /> pump ; add interface logic with the post treatment to call for this treatment when <br /> required ; to read the status of degasifier inlet valves for permit to start the trains ; <br /> relocate the 1/0 for the blend control and the raw water influent pH signal ; and any <br /> other modifications or deletions for modified / relocated equipment. <br /> 2 . Create new files within the existing PLC5 (programmable logic controller) program <br /> for the two new remote UO racks for this addition, utilizing specific file organization <br /> to break the program down into logical parts , provide control over the new systems , <br /> allow operators to place equipment 'out of service', change setpoints and timer presets, <br /> provide time delay for equipment startup, alarm delay timers to prevent chatter <br /> alarms, safety interlocking for pumps ; lead, lag 1 , lag2 with variable alternation time <br /> and step based transfer pump control via level / floats, with level controlled VFD <br /> (variable frequency drive) interface in auto mode and operator manual override in <br /> manual mode ; degasifier valve control , blower and inlet damper control , scrubber pH <br /> and ORP control with recirculation pump selection and fill valve control . <br /> Task 4 — HMI Design <br /> 1 . Create new HMI (human machine interface) displays , matching the existing format, <br /> for the clearwell and transfer pumps , the degasifiers and blowers , the scrubbers and <br /> recirculation pumps , new PLC communications/status and alarm screens . Modify the <br /> existing HMI database and configurations for the new 1/0 and the new and existing <br /> displays for the blend flow control , caustic feed system, chlorine feed system, GST <br /> display and any other display impacted by modifications to the existing system . <br /> Task 5 — Implementation <br /> - 2 - <br />