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Table A-1 <br /> Sample Volume, Container Type, <br /> and Preservation Requirements <br /> Parameters Volume Required (ml) Container Type Preservation <br /> Volatile Halocarbons 40 Olass with Teflon® -lined IiCI to p11<2 <br /> septum Cool to 4°C <br /> Volatile Aromatics 40 Olass with Teflon-lined HCl to pllQ <br /> Septum Cool to 4°C <br /> Me(als'a 500 Plastic' IINO, to pll<2 <br /> Cool to 4°C <br /> Alkalinity 100 Plastic Cool to 4°C <br /> Chemical Oxygen Demand 50 Plastic 11 SO to p1l<2 <br /> 6c ')I to 4°C <br /> Chloride 50 Plastic Cool to 4°C <br /> Hexavalent Chromium 500 Plastic Cool to 4°C <br /> Nitrogen Ammonia 50 Plastic H SO to p11<2 <br /> 'I to 4°C <br /> Hardness' 100 Plastic IINO, to p11<2 <br /> Cool to 4°C <br /> Nitrate-Nitrogen 100 Plastic IINO, to p1I<2 <br /> Cool to 4°C <br /> Sulfate 50 Plastic Cool to 4°C <br /> Sulfide 500 Plastic 2 ml zinc acetate <br /> Cool to 4°C <br /> Total Dissolved Solids 100 Plastic Cool to 4°C <br /> Total Organic Carbon 25 Glass with Teflon-lined IINO, to p11<2 <br /> Septum Cool to 4°C <br /> Metals include aluminum,antimony,arsenic,barium,beryllium,boron,cadmium,calcium,chromium(total),cobalt,copper,iron,lead,magnesium,manganese,mercury, <br /> molybdenum,nickel,potassium,selenium,silver,sodium,thallium,tin,vanadium,and zinc. <br /> 'Groundwater samples are field filtered dirough a 0.45-micron acrylic copolymer filter before preservation. <br /> 'Plastic=linear polyethylene. <br />