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Lab No. 32147 -2-- <br /> Included is the data from an experiment eve ran to explain the low NO3 values. <br /> Each sample was spiked with enough NO to raise its NO level 89 mg/L. <br /> The samples were left in closed ;ars at room temperature for 3 days. <br /> At the end of that tiire, the samples were analyzed to determine the NO <br /> 3 <br /> concentration. <br /> ' In addition, I ran TKN tests on the original samples and the final spiked <br /> samples after 3 days to determine if any of the NO3 had been converted to <br /> NH3 or Organic N. (only samples -1, -2 were run) <br /> Sample 3 did not exhibit NO decrease different from the control. Since this <br /> was the only sample that diA not exhibit a strong "septic odor" it can be <br /> surmised that some unknown factor rendered any organisms present incapable of <br /> NO3 utilization. <br /> Conclusion: No., is being loth destroyed and incorporated into septic biomass. <br /> Together this would probably account for low NO levels in septic samples giver. <br /> significant No inputs. <br /> * = Less Than <br /> F � if there are questions, please call or write. <br /> very truly yours, <br /> Minn, Ph.D. <br /> Laboratory Director <br /> JFQ•Jgd <br /> E <br /> } <br /> 3f�I! <br /> R <br />