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Table 2 Groundwater Sample Collection and Analysis Information Analyte Method Sample Container Preservative Holding Times Reporting Limit /L i pH SM 4500WB 48 hours NA Conductivity SM 2510B 28 days 10 pmhos/cm Dissolved Oxygen SM 45000G ASAP2 Instrument Specifics Oxidation Reduction Potential SM 2580B 1 L plastic Cool to 4°C (t 2°C) ASAP2 Instrument Specific3 Total Dissolved Solids SM 2540C bottle , 7 days 10,000 Hardness SM 2340C 180 days = NA Chloride EPA 300.0 28 days 1000 Fluoride SM 450OF"C 28 days 100, Sulfate EPA 300.0 28 days 1000 Gross Alpha EPA 900.0 2 L plastic Cool to 4°C (±,2°C), 1`80 days MDC Gross Beta EPA 900.0 bottle HN03 to pH<2 , 180 days MDCa Nitrate EPA 353.2 500 mL, Cool to 4°C (t 2°C);' 28 days 50 Nitrite EPA 353.3 plastic bottle H2SO4 to pH <2 48 hours 100 Tritium Modified s 3H-04-RC 100 mL plastic bottle None NA 14 Pci/L Aluminum EPA 200.8/200.7 100 Antimony EPA 200.8/200.7 1 Arsenic EPA 200.81200.7 1 Barium EPA 200:8/200.7 1 Beryllium EPA 200.8/200.7 1 Boron EPA 200.8/200.7 100 Cadmium EPA 200.81200.7 1 Chromium EPA200.8/200.7 1 Cobalt EPA 200:81200.7 1 Copper EPA 200.8/200:7 1 Iron EPA 200.8/2007 Cool to 4°C (t 2°C), 30 Lead EPA 200.8/200.7 500 mL l stic b ttl HN03 to pH<2, 0.45 180 days 1 Lithium EPA 200.8/200.7 a o e P µm filtration 100 Manganese EPA..200.81200.7` 1 Mercury EPA 245.1 1 Molybdenum EPA 200,8/200.7 1 Nickel EPA 200:8/200.7 1 Selenium EPA 200.8/200.7 1 Silver EPA 200.8/200.7 1 Thallium EPA 200.8/200.7 1 Uranium EPA 200.8/200.7 1 Vanadium EPA 200.8/200.7 1 Zinc EPA 200.8/200.7 1 Notes: