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Following testing, two design modification were made to the plant that had the potential for having an impact <br /> on the treatment process. <br /> During the testing exhaust from the thermal processor was vented to the atmosphere. MicroSepTec <br /> proposed venting the thermal processor through the primary clarifier 20 inches below the surface of the <br /> water. NSF reviewed this modification and found that it would not have a negative impact on the treatment <br /> performance of the plant. A drawing of the exhaust pipe is included in this appendix. <br /> During the testing the sludge recirculation pump ran once every hour for 40 seconds. MicroSepTec <br /> proposed changing this to run in four 10 second pumpout cycles every hour. The 10 second on times for <br /> the pump are separated by three 120 second off times. NSF reviewed this modification and found that it <br /> would not have a negative impact on treatment performance. <br /> Based on the reviews, the design modifications are approved for use in the certified EnviroServer 600. <br /> 991tB12o?5Jt]60 This report may not be reproduced in whole mIn part P 48 ot49 <br /> Final Report withowt.ftw pnmed written consent of NSF IrAemationat.• ,gp�ry pop <br />