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Sample location <br /> Parameter Sample type Raw influent Treated effluent Testing location <br /> BODS 24 h composite X Laboratory <br /> CBOD5 24 h composite X Laboratory <br /> Total suspended solids 24 h composite X X Laboratory <br /> pH Grab X X Test site <br /> Temperature (°C) Grab X X Test site <br /> Dissolved oxygen Grab X Test site <br /> Alkalinity (as CaCO3) 24 h composite X X Laboratory <br /> TKN (as N) 24 h composite X X Laboratory <br /> Ammonia-N (as N) 24 h composite X X Laboratory <br /> Nitrite/nitrate-N (as N) 24 h composite X X Laboratory <br /> 8.3.4 Analytical methods <br /> The appropriate methods in Standard Methods shall be used to complete the analyses indicated in 8.3.3. <br /> 8.4 Criteria <br /> 8.4.1 Testing conditions <br /> If conditions during the testing and evaluation period result in system upset, improper sampling, improper <br /> dosing, or influent characteristics outside the ranges specified in 8.2.1, an assessment shall be conducted to <br /> determine the extent to which these conditions adversely affected the performance of the system. Based on <br /> this assessment, specific data points may be excluded from the averages. Rationale for all data exclusions <br /> shall be documented in the final report. <br /> 8.4.2 Catastrophic site problems <br /> In the event that a catastrophic site problem not described in the Standard including, but not limited to, <br /> influent characteristics, malfunctions of test site apparatus and acts of God, jeopardizes the validity of the <br /> performance testing, manufacturers shall be given the choice to: <br /> — perform maintenance on the system, reinitiate system start-up procedures, and restart the <br /> performance testing; or <br /> —with no routine maintenance performed, have the system brought back to pre-existing conditions <br /> and resume testing within 3 wks after the site problem has been identified and corrected. Data <br /> collected during the system recovery period shall be excluded from the effluent averages. <br /> NOTE—"Pre-existing conditions" shall be defined as the point when the results of 1 wk's worth of <br /> sampling are within 15% of the averages of the samples from the previous 3 wks of sampling. <br /> 8.4.3 Effluent quality <br /> 15/10/055/0030 This report may not be reproduced in whole or in part Page 31 of 64 <br /> Final Nitrogen Report without the expressed written consent of NSF International June 2019 <br />