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8.5.2.3.3 Oily film and foam <br /> Oily films and foaming shall not be visually detected in any of the diluted composite effluent samples. <br /> 8.5.3 Class II systems <br /> The following criteria shall be met in order for a system to be classified as a Class 11 residential wastewater <br /> treatment system. <br /> 8.5.3.1 CBOD5 <br /> Not more than 10% of the effluent CBOD5 values shall exceed 60 mg/L. <br /> 8.5.3.2 TSS <br /> Not more than 10% of the effluent TSS values shall exceed 100 mg/L. <br /> 15/10/055/0030 This report may not be reproduced in whole or in part Page 29 of 59 <br /> Final Report without the expressed written consent of NSF International January 2019 <br />