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WAS (surfactants) 100 Plactic,Glass Refrigerate to 48 Hours <br />4°C <br />Fluoride 500 Plastic None required 28 Days <br />1. Plastic = Linear Polyethylene <br />2. Field filtered through a disposable, 0.45 -micron, acryllic copolymer filter prior to preser- <br />vation with nitric acid. <br />PJ9 9390207.001) A-7 <br />0 <br />0 <br />Table A-1 <br />SAMPLE VOLUME, <br />CONTAINER, PRESERVATIVE <br />AND <br />HOLDING TIME FOR INDICATOR <br />PARAMETERS <br />(Continued) <br />Volume <br />Holding <br />Parameter <br />Required (ml) <br />Container <br />Preservative <br />Time <br />Volatile organics <br />40/Duplicated <br />Glass with <br />Refrigerate <br />14 <br />Days <br />(EPA Method 624) <br />Teflon septum <br />to 4°C, HCl <br />to pH<2 <br />Metals, except <br />1,000 <br />Plastic, Glass <br />HNO3 to pH<2 <br />6 <br />Months <br />mercury2 <br />Mercury2 <br />500 <br />Plastic, Glass <br />HNO3 to pH<2 <br />28 <br />Days <br />Sulfate <br />500 <br />Plastic, Glass <br />Refrigerate to <br />28 <br />Days <br />4°C <br />Chemical oxygen demand <br />100 <br />Plastic, Glass <br />Refrigerate to <br />28 <br />Days <br />4°C, H2SO4 to <br />pH<2 <br />WAS (surfactants) 100 Plactic,Glass Refrigerate to 48 Hours <br />4°C <br />Fluoride 500 Plastic None required 28 Days <br />1. Plastic = Linear Polyethylene <br />2. Field filtered through a disposable, 0.45 -micron, acryllic copolymer filter prior to preser- <br />vation with nitric acid. <br />PJ9 9390207.001) A-7 <br />