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9 Performance testing and evaluation NOTE—The manufacturer may recommend or offer more frequent service and maintenance of the system but for the This section describes the methods used to evaluate the purpose of performance testing and evaluation,service and maintenance shall not be performed beyond what is performance of residential wastewater treatment systems. specified in this standard. Systems shall be designated as Class I or Class It. The performance classification shall be based upon the 9.2 Testing and evaluation conditions, hydraulic evaluation of effluent samples collected from the system loading,and schedules over a 6-month period. r 9.1 Preparations for testing and evaluation 9.2.1 Influent wastewater characteristics The 30-day average CBODS concentration of the 9.1.1 The system shall be assembled, installed, and wastewater delivered to the system shall be between 100 filled in accordance with the manufacturer's instructions. mg/L and 300 mg/L. 9.1.2 The manufacturer shall inspect the system for The 30-day average TSS concentration of the proper installation. If no defects are detected and the swastewater delivered to the system shall be between 100 system is judged to be structurally sound, it shall be placed into operation in accordance with the mg/L and 350 mg/L. manufacturer's start-up procedures. If the manufacturer does not provide a filling procedure, 2/3 of the system's 9.2.2 Hydraulic loading and schedules capacity shall be filled with water and the remaining 1/3 The performance of the system shall be evaluated for 26 shall be filled with residential wastewater. consecutive weeks. During the testing and evaluation 9.1.3 The system shall undergo design loading period, the system shall be subjected to 16 weeks of (Section 9.2.2.1)until testing and evaluations are initiated. design loading,followed by 7.5 weeks(52 days)of stress Sample collection and analysis shall be initiated within 3 loading, and then an additional 2.5 weeks (18 days) of weeks of filling the system and, except as specified in design loading. Section 9.5.1.2, shall continue without interruption until the end of the evaluation period. 9.2.2.1 Design loading 9.1.4 If conditions at the testing site preclude The system shall be dosed 7 days a week with a installation of the system at its normally prescribed depth, wastewater volume equivalent to the daily hydraulic the manufacturer shall be permitted to cover the system capacity of the system. The following schedule shall be with soil to achieve normal installation depth. adhered to for dosing: 9.1.5 Performance testing and evaluation of systems 6:00 a.m. to 9:00 a.m. approximately 35%of the rated shall not be restricted to specific seasons. daily hydraulic capacity 9.1.6 When possible, electrical or mechanical defects 11:00 a.m. to 2:00 p.m. approximately 25%of the rated shall be repaired to prevent evaluation delays. All repairs daily hydraulic capacity made during the performance testing and evaluation shall be documented in the final report. 5:00 p.m.to 8:00 p.m. approximately 40%of the rated daily hydraulic capacity 9.1.7 The system shall be operated in accordance with the manufacturer's instructions. However, routine service x•2.2.2 Stress loading and maintenance of the system shall not be permitted during the performance testing and evaluation period. Stress loading is designed to evaluate a system's . performance under four non-ideal conditions. Systems shall be subjected to each stress condition once during the 6-month testing and evaluation period and each of 01/11/2015/060 This report may not be reproduced in whole or in part Page 26 of 46 Final Report without the expressed written consent of NSF International. Apri[2002