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9 Performance testing and evaluation 9.2 Testing and evaluation conditions, hydraulic loading,and schedules This section describes the methods used to evaluate the performance of residential wastewater treatment 9.2.1 Influent wastewater characteristics systems. Systems shall be designated as Class I or Class II. The performance classification shall be based The 30-day average CBOD5 concentration of the upon the evaluation of effluent samples collected from wastewater delivered to the system shall be between 100 the system over a 6-month period. mg/L and 300 mg/L. 9A Preparations for testing and evaluation The 30-day average TSS concentration of the ' wastewater delivered to the system shall be between 100 9.1.1 The system shall be assembled, installed, and mg/L and 350 mg1L. filled in accordance with the manufacturer's instructions. 9.2.2 Hydraulic loading and schedules 9.1.2 The manufacturer shall inspect the system for proper installation. If no defects are detected and the The performance of the system shall be evaluated for 26 system is judged to be structurally sound, it shall be consecutive weeks. During the testing and evaluation placed into operation in accordance with the period, the system shall be subjected to 16 weeks of manufacturer's start-up procedures. If the manufacturer design loading,followed by 7.5 weeks(52 days)of stress does not provide a filling procedure, %of the system's loading, and then an additional 2.5 weeks (18 days)of capacity shall be filled with water and the remaining 1/3 design loading. shall be filled with residential wastewater. 9.2.2.1 Design loading 9.1.3 The system shall undergo design loading (Section 9.2.2.1) until testing and evaluations are. The;system shall be dosed 7 days a week with a initiated. Sample collection and analysis shall be initiated wastewater volume equivalent to the daily hydraulic within 3 weeks of filling the system and except as, opacity.qf the system. The following schedule shall be specified in Section 9.5.1.2; shall con without adhered Co.'fc(r doing: interruption until the end of the evaluation plriod. 6:00 a.m.to 9:00 a.m. approximately 35%of the rated 9.1.4 If conditions at the testing site preclude daily hydraulic capacity installation of the system at its normally prescribed depth, the manufacturer shall be permitted to cover the system 11:00 a.m.to 2:00 p.m. approximately 25%of the rated with soil to achieve normal installation depth. daily hydraulic capacity 9.1.5 Performance testing and evaluation of systems 5:00 p.m.to 8:00 p.m. approximately 40%of the rated shall not be restricted to specific seasons. daily hydraulic capacity 9.1.6 When possible,electrical or mechanical defects 9.2.2.2 Stress loading shall be repaired to prevent evaluation delays. All repairs made during the performance testing and evaluation Stress loading is designed to evaluate a system's shall be documented in the final report. performance under four non-ideal conditions. Systems shall be subjected to each stress condition once during 9A.7 The system shall be operated in accordance with the 6-month testing and evaluation period and each of the manufacturer's instructions. However, routine the four stress conditions shall be separated by 7 days of service and maintenance of the system shall not be design loading(Section 9.2.2.1). permitted during the performance testing and evaluation s period. 9.2.2.2.1 Washday stress NOTE—The manufacturer may recommend or offer more frequent service and maintenance of the system but for the The wash-day stress shall consist of three wash-days in purpose of performance testing and evaluation,service and a 5-day period. Each wash-day shall be separated by a maintenance shall not be performed beyond what is 24-hour period. During a wash-day,the system shall be specified in this standard. loaded at times and capacities similar to those delivered during design loading(Section 9.2.2.1), however during S9I78r2Q1atOBD " This report tmaay.not be reproduced In v&tole or.in part Page 28 of 49 Final Report without the expressed vaUtewconsent of NSF Jnbematlonal., April 2000