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TAYLOR <br /> Soil & Septic System Consulting <br /> Soil Scientist • CST#70066 • Designer of Engineering Systems #1253-007 <br /> 638 8th Avenue, Baraboo, WI 53913 <br /> taylors2@charter.net <br /> 608-448-2037 <br /> February 11, 2020 <br /> Rosenthal's Resort <br /> 30925 Namekagon Road <br /> Danbury, WI 54830 <br /> Attention Maria and John Rosenthal: <br /> This letter is to summarize our recent phone conversation on February 7 regarding the <br /> regulatory status of the septic system serving the restaurant at your resort which was <br /> installed in November, 2004. It is my understanding that Burnett County officials are <br /> questioning the system's operational compliance with SPS 383 of the Wisconsin <br /> Administrative Code based on lab reports (Era Laboratories, Inc) of BOD(5) <br /> concentrations in three samples of septic tank effluent analyzed in 2010. The reported <br /> BOD(5) concentrations were as follows: <br /> May 25, 2010 360 mg/L <br /> May 27, 2010 550 mg/L <br /> June 9, 2010 220 mg/L <br /> The May 25 and May 27 samples indicate that BOD(5) concentrations of influent <br /> received by the soil component of the system exceed the allowable limit of 220 mg/L <br /> pursuant to SPS 383.44(2), Wisconsin Administrative Code. The approved <br /> Management Plan for the system also specifies an upper limit of 220 mg/L BOD(5) to be <br /> discharged to the soil dispersal component. (The lab reports indicate that the two other <br /> regulated parameters, TSS and FOG, were well within regulatory limits. See the <br /> relevant code sections in the attached addendum.) <br /> As discussed in our phone conversation, BOD(5) is an index of the concentration of <br /> oxidizable organic matter being discharged to the soil dispersal component. It is a <br />