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October 2015 MLGW-ACR GW Quality Memo♦4 <br /> bacteria. BART samples were monitored in Aquionix's office for iron-related bacteria test <br /> (IRB), sulfate-reducing bacteria test (SRB), and slime forming bacteria test (SLYNI). All tests <br /> were performed according to the manufacturer's instructions. <br /> The field parameters at the time of sample collection were as follows: <br /> • pH—6.5 s.u. <br /> • Temperature—9.9°C <br /> • Conductivity—426.6 [is/cm <br /> • Oxidation Reduction Potential (ORP) —90.2 mV <br /> The BART"samples are assessed based on visual observations of color or clarity changes in <br /> the water. All samples were colorless and clear at the time of sample collection. Photographs <br /> of BART'samples following day one and days four through eight are presented in Appendix <br /> A along with the Aquionix's report on the test results. The BART"test guide is also provided <br /> in Appendix A for reference purposes. <br /> In general, the BART"tests showed that MLGW-ACR tested positive for the presence of <br /> IRB with elevated population counts. <br /> 2.3 BACTERIOLOGICAL TESTING <br /> Following the BART"' tests,an additional water sample was collected from MLGW-ACR by <br /> Aquionix for more detailed chemical and biological analysis. The water sample was collected <br /> on April 28,2015 from the well using a bailer. The sample was submitted to Water Systems <br /> Engineering, Inc (WSE) of Kansas for laboratory analysis. The sample was collected <br /> according to WSE instructions and the sample was analyzed for general water quality and <br /> bacteriological parameters. The WSE report is provided in Appendix B. The WSE report <br /> includes numerical results for the sample and presents discussions, observations, and <br /> interpretations. The following is a summary of key results from the WSE report: <br /> • The sample yielded relatively low alkalinity with moderate hardness and total dissolved <br /> solids and a basically neutral pH. <br /> • The ORP was indicative of an oxidative condition with a tendency for metal oxide <br /> deposition in the presence of metal ions. <br />