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254 <br />during the construction of the system who shall be responsible for certifying <br />compliance of the installation with approved plans and specifications. A contract with <br />a soil scientist for installation supervision may also be required. <br />The certifying engineer shall provide record plans and specifications (one copy to <br />LHD and one copy to OSWP Central office) along with the certification which shall <br />bear his /her professional engineer's seal. <br />The engineer shall complete an operation and maintenance manual including O and M <br />materials provided by the appropriate equipment suppliers and submit to the owner and <br />proposed Operator in Responsible Charge (ORC). <br />19. The Operation Permit may be issued by the LHD when: <br />The installation has been properly certified by the certifying professional engineer, and <br />record plans and specifications have been furnished. <br />The installation is determined to be complete by the LHD based upon field inspection, <br />including final landscaping, seeding and mulching, provisions for proper system <br />maintenance and monitoring (e.g. any groundwater monitoring wells) are in place, a <br />system Astart-up- inspection has been completed and the system is found to be <br />complete and operational, and the system operation and maintenance manual has been <br />furnished. The OSWP will assist with the LHD's final inspection for all systems <br />containing advanced pretreatment components (e.g. tertiary treatment plants) or <br />complex distribution or control components and may assist with other systems upon <br />request. <br />All necessary legal documents have been properly executed and recorded, including <br />the tri -party agreement (when applicable) and any required easements, and <br />documentation is provided that the owner has executed a contract with an ORC who is <br />duly certified by the Water Pollution Control System Operators Certification <br />Commission to operate and maintain this system. <br />All other conditions of the improvement permit and Authorization to Construct it have <br />been met. <br />Time lines established for OSWP review activities are subject to variation depending on staff <br />shortages and project - specific circumstances. <br />