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The average wastewater alkalinity of the wastewater delivered to the system over the course of the testing <br /> shall be greater than 175 mg/L as CaCO3 (alkalinity may be adjusted if inadequate). Unless requested by the <br /> manufacturer, the raw influent shall be supplemented with sodium bicarbonate if the wastewater is found to <br /> be deficient in alkalinity. <br /> 8.2.2 Hydraulic loading and schedules <br /> The performance of the system shall be evaluated for 26 consecutive wk. During the testing and evaluation <br /> period, the system shall be subjected to 16 wk of design loading, followed by 7.5 wk (52 days) of stress <br /> loading, and then an additional 2.5 wk (18 days) of design loading. <br /> 8.2.2.1 Design loading <br /> The system shall be dosed 7 days a week with a wastewater volume equivalent to the daily hydraulic <br /> capacity <br /> of the system. The following schedule shall be adhered to for dosing: <br /> Time Frame Approximate %rated daily hydraulic capacity <br /> 6 a. m. —9 a. m. 35 <br /> 11 a. m. —2 p. m. 25 <br /> 5 p. m. —8 p. m. 40 <br /> NOTE—The individual dosage shall be no more than 10 gallons per dose, unless the dosage system is based <br /> on a continuous flow, and be uniformly applied over the dosing periods. <br /> 8.2.2.2 Stress loading <br /> Stress loading is designed to evaluate a system's performance under four non-ideal conditions. Systems <br /> shall <br /> be subjected to each stress condition once during the 6-month testing and evaluation period, and each of the <br /> four stress conditions shall be separated by 7 days of design loading (see 8.2.2.1). <br /> 8.2.2.2.1 Wash-day stress <br /> The wash day stress shall consist of 3 wash days in a 5-day period. Each wash day shall be separated by a <br /> 24-h period. During a wash-day,the system shall be loaded at times and capacities similar to those delivered <br /> during design loading (see 8.2.2.1), however during the first two dosing periods per day, the design loading <br /> shall include 3 wash loads (3 wash cycles and 6 rinse cycles). <br /> 8.2.2.2.2 Working-parent stress <br /> For 5 consecutive days, the system shall be subjected to a working-parent stress. During this stress, the <br /> system shall be dosed with 40% of its daily hydraulic capacity between 6:00 a.m. and 9:00 a.m. Between <br /> 5:00 <br /> p.m. and 8:00 p.m., the system shall be dosed with the remaining 60% of its daily hydraulic capacity, which <br /> shall include 1 wash load (1 wash cycle and 2 rinse cycles). <br /> 8.2.2.2.3 Power/equipment failure stress <br /> The system shall be dosed with 40% of its daily hydraulic capacity between 5:00 p.m. and 8:00 p.m. on the <br /> 15/10/055/0030 This report may not be reproduced in whole or in part Page 24 of 59 <br /> Final Report without the expressed written consent of NSF International January 2019 <br />