Calculating 90th percentile lead copper
[DOC File]R309-210 - Utah
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(A) Lead levels. To qualify for a full waiver, or a lead waiver, the system must demonstrate that the 90th percentile lead level does not exceed 0.005 mg/L. (B) Copper levels. To qualify for a full waiver, or a copper waiver, the system must demonstrate that the 90th percentile lead …
[DOC File]Lead and Copper Sampling Guidance
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If your 90th percentile lead level is greater than 0.015 mg/l, you have exceeded the action level. 4) Determine the 90th percentile copper level by following the instructions given in Table 2. Compare this value to the copper action level. If your 90th percentile copper level is greater than 1.3 mg/l, you have exceeded the action level.
[DOCX File]ANALYTICAL RESULTS FOR LEAD & COPPER TAP WATER …
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These samples are being collected to determine the lead and copper levels in your tap water. This sampling effort is required by the U.S. Environmental Protection Agency (EPA) and the Alabama Department of Environmental Management (ADEM) under the Lead and Copper Rule, and is being accomplished through a collaboration between the public water system and their consumers (e.g. …
[DOCX File]The Lead and Copper Rule .gov
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If your lead or copper 90th percentile result exceeds the action level, contact the Division immediately. Action Level Exceedance If there is a lead or copper action level exceedance, the water system will be moved back their initial monitoring count and will be sampling for lead and copper every six months.
[DOC File]mde.state.md.us
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Calculating the 90th percentile: For lead and copper, list samples from the highest recorded value to the lowest recorded value. Starting from the bottom (lowest value) count up until the calculated number (# of samples analyzed x 0.9) is reached. The sample value in this number position is the 90th percentile.
[DOC File]irections for completing
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ALGs allow for a margin safety. Lead and Copper MCLG Violation. Y/N 90th percentile Unit. Measurement Action Level Sites over action level Likely Source of Contamination Copper . Sampled 2018 1.3 N 0.11 ppm 1.3 0 Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives Lead
[DOC File]Lead and Copper Results Worksheet
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Write down the 90th percentile level for Lead = mg/L (AL = 0.015 mg/L) 4. Determine the 90th percentile copper level by following the instructions given in Table 2.
[DOC File]Consumer Confidence Report - Geneseo Hills
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Lead and Copper. Date Sampled. MCLG. Action Level (AL) 90th Percentile # Sites Over AL. Units. Violation. Likely Source of Contamination. Copper. 1.3 1.3 1.9 0 ppm . N. Erosion of natural deposits; Leaching from wood preservatives; Corrosion of household plumbing systems. Lead
[DOC File]Systems serving 101-500 population
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Calculating or Determining the 90th Percentile. during Initial, Follow-up, Routine, and . Reduced Monitoring. If you collect 5 samples, calculate your 90th percentile like this: Rank your samples in order of concentration (mg/L), starting from lowest to highest. Find the average of the two highest results by adding them together and dividing by 2.
[DOC File]Maryland Department of the Environment
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Calculating the 90th percentile: For lead and copper, list samples from the highest recorded value to the lowest recorded value. Starting from the bottom (lowest value) count up until the calculated number (# of samples analyzed x 0.9) is reached. The sample value in this number position is the 90th percentile.
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