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TABLE I. SUMMARY OF ANALYTICAL RESULTS <br /> Interquartile <br /> Average Std. Dev. Minimum Maximum Median Range <br /> Biochemical Oxygen Demand (mg/L) <br /> Influent (BODS) 200 66 100 560 200 160 - 240 <br /> Effluent (CBOD5) 9 11 <2 48 3 2- 11 <br /> Total Suspended Solids (mg/L) <br /> Influent 180 44 70 430 180 150 - 190 <br /> Effluent 10 8 <2 57 7 4 - 15 <br /> pH <br /> Influent - - 6.4 8.2 7.1 6.9 - 7.2 <br /> Effluent - - 6.0 6.8 6.4 6.2 - 6.5 <br /> Temperature (°C) <br /> Influent 16 5 7 22 18 10 - 20 <br /> Effluent 15 6 5 23 17 8 - 21 <br /> Dissolved Oxygen (mg/L) <br /> Effluent 3.7 2.7 0.2 9.6 2.9 1.4 -6.0 <br /> Notes: The median is the point where half of the values are greater and half are less. <br /> The interquartile range is the range of values about the median between the upper and lower <br /> 25 percent of all values. <br /> Criteria for evaluating the analytical results from the testing are described in Section 8.5 of NSF/ANSI <br /> Standard 40. In completing the pass/fail determination for the data, an allowance is made for effluent TSS <br /> and CBOD5 during the first month of testing. The 30-and 7-day averages during this time may not equal or <br /> exceed 1.4 times the effluent limits required for the rest of the test. This provision recognizes that an <br /> immature culture of microorganisms within the system may require additional time to achieve adequate <br /> treatment efficiency. Effluent CBOD5 and TSS concentrations from the DN450 during the first calendar <br /> month of testing were within the normal limits and did not need to use this provision. <br /> Section 8.5.1.1 of the Standard provides guidance addressing the impact of unusual testing conditions, <br /> including sampling, dosing, or influent characteristics, on operation of a system under test. Specific data <br /> points may be excluded from 7- and 30-day average calculations where determined to have an adverse <br /> impact on performance of the system, with rationale for the exclusion to be documented in the final report. <br /> Sections 3.6 and 8.2.1 of the Standard define influent wastewater characteristics as they apply to testing <br /> under the Standard. Typical domestic wastewater is defined as having a 30-day average BODS <br /> concentration between 100 and 300 mg/L and a 30-day average TSS concentration between 100 and 350 <br /> mg/L. The 30-day average influent remained inside this specified range for the duration of the test. <br /> 15/10/055/0030 This report may not be reproduced in whole or in part Page 10 of 59 <br /> Final Report without the expressed written consent of NSF International January 2019 <br />