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Resident/Homeowner Name July 26, 2016 <br /> Address <br /> Elk River, MN 55330 <br /> Dear Resident/Homeowner Name, <br /> Thank you for participating in the lead/copper tap monitoring that was recently conducted. <br /> This letter is to report the lead/copper results at your residence.The reported results for your residence are_parts <br /> per billion (ppb)for lead, and ppb for copper. <br /> The 90th percentile lead and copper levels for our system are 2 ppb for lead, and 152 ppb for copper. The action level <br /> for lead is 15.0 ppb with the maximum contaminant level goal(MCLG)set at zero.The action level and MCLG for <br /> copper is 1300.0 ppb.The results indicate that we have not exceeded lead and have not exceeded copper. <br /> The following definitions will be helpful with regard to the information provided above: <br /> 90th Percentile Level—This is the value obtained after disregarding 10 percent of the samples taken that had the <br /> highest levels. (For example, in a situation in which 10 samples were taken,the 90th percentile level is determined by <br /> disregarding the highest results,which represents 10 percent of the samples). In situations in which only 5 samples <br /> are taken,the average of the two with the highest levels is taken to determine the 90th percentile level. <br /> Action Level The concentration of a contaminant which, if exceeded,triggers treatment or other requirements <br /> which a water system must follow. <br /> Maximum Contaminant Level Goal(MCLG)—The level of a contaminant in drinking water below which there is no <br /> known or expected risk to health. MCLGs allow for a margin of safety. <br /> For additional information on lead and copper in your drinking water, please refer to the enclosed fact sheet or go to <br /> www.health.state.mn.us/water. <br /> If you have any questions, please contact Eric Volk at 763.441.2020. <br /> Sincerely, <br /> Eric Volk,Water Superintendent <br /> 89 <br />