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6 FULL-SCALE SYSTEM SIZING This section is intended to describe the basis of sizing the UV/H 2 O 2 AOP System for Saint Anthony proposed by Trojan Technologies. Trojan’s general approach to UV oxidation system sizing relies upon the combination of understanding the fundamental photochemistry of the UV oxidation process together with a thorough understanding of the hydraulic and optical performance of Trojan reactors, as well as extensive full- scale experience to provide, with confidence, performance warranties for all Trojan UV oxidation systems. Specifically, the sizing method that Trojan typically employs is comprised of the following steps: 1) Through a combination of bench-scale experimentation and literature review determine the fundamental photochemical kinetic parameters for the specific contaminants that govern the rate of contaminant destruction by the UV photolysis and UV/H 2 O 2 process. These fundamental kinetic parameters include the quantum yield and molar absorption coefficient as a function of the irradiation wavelength which together determine the rate of direct photolysis of the contaminant in response to a delivered UV dose. They also include the second order rate constant for the reaction between the contaminant and the hydroxyl radical. The water constituents could undergo photochemical reactions generating reactive species such as triplet states and radicals which could affect the contaminant photochemistry/chemistry in that specific water. These parameters and the role of water constituents on various contaminant structures, including pesticides, algal toxins, taste-and-odor causing compounds, pharmaceuticals and so on are determined by performing properly designed collimated beam experiments. 2) Determine the UV transmittance (%T, also abbreviated as UVT) across the radiation wavelength relevant to the UV application and the hydroxyl radical scavenging capacity of representative water samples. The water UVT is measured over the wavelength range from 200 to 400 nm using a calibrated spectrophotometer. The scavenging capacity of the water is determined from a properly designed collimated beam methodology. 3) Input these parameters together with the system design parameters (flow and treatment goal) into Trojan’s proprietary mathematical model of the UV photolysis and UV/H 2 O 2 process for the TrojanUVPhox™ reactor. 4) Trojan’s proprietary model comprises the following system characteristics: a) It incorporates the photochemical kinetics for direct UV photolysis and hydroxyl radical based UV-oxidation by modeling the contaminant destruction kinetics for the given water quality defined by the UVT and the hydroxyl radical scavenging demand. b) It utilizes computational fluid dynamics (CFD) and UV intensity models to characterize the product of the hydraulic behavior and the UV intensity gradients within Trojan’s various reactors. This task requires a detailed knowledge of the internal dimensions and structures of each possible reactor model together with the lamp spectral power distribution and efficiency, quartz sleeve UV light transmitting characteristics, and their specific geometric positioning inside the UV reactor relative to the flow patterns. c) Specific reactor characteristics used in the modeling have been calibrated and subsequently re- validated using numerous sets of full-scale, real world results. The TrojanUVPhox design incorporates the knowledge base accumulated from Trojan’s extensive experience. 5) The model output provides the optimum combination of UV power and H 2 O 2 concentration resulting in a minimum NPV for the system. 6) Trojan has extensive full-scale experience in applying both the UV direct photolysis and UV/H 2 O 2 process in various water treatment applications. These full-scale installations comprise projects treating contaminants including pesticides, industrial solvents, cyanides, taste-and-odor 17