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CERTIFICATION <br /> NSF International has determined by performance evaluation under the provisions of NSF/ANSI Standard <br /> 245 (revised April 2013)that the GSF Denitrification System DN450 manufactured by Eljen Corporation has <br /> fulfilled the requirements of NSF/ANSI Standard 245. The GSF Denitrification System DN450 has therefore <br /> been authorized to bear the NSF Mark so long as Eljen Corporation continues to meet the requirements of <br /> Standard 245 and NSF General and Program Specific Policies. <br /> General performance evaluation and stress tests were performed at the Wastewater Technology Site located <br /> at the MASSTC Facility located in Bourne, Massachusetts. The raw wastewater used in the test was <br /> residential wastewater. The characteristics of the wastewater during the test are included in the tabulated <br /> data of this report. <br /> The observations and analyses included in this report are certified to be correct and true copies of the data <br /> secured during the performance tests conducted by NSF on the wastewater treatment system described <br /> herein. The manufacturer has agreed to present the data in this certification in its entirety whenever it is <br /> used in advertising, prospectuses, bids or similar uses. <br /> J�AV WkOL <br /> Theresa Bellish Sharon Steiner <br /> General Manager Business Unit Manager <br /> Water Systems Wastewater Treatment Unit Program <br /> 15/10/055/0030 This report may not be reproduced in whole or in part Page 4 of 64 <br /> Final Nitrogen Report without the expressed written consent of NSF International June 2019 <br />