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0 <br /> Table -1 <br /> Sample Volume, Container Type, <br /> and Preservation Requirements <br /> Parameters Volume Required (ml) Container Type Preservation <br /> Volatile Halocarbons 40 Glass with Teflon -lined HCl to pH<2 <br /> septum Cowl to 4°C <br /> Volatile Aromatics 40 Glass with Teflon-lined HCl to pH<2 <br /> Septum Cowl to 4°C ,` <br /> Metals" 500 Plastic' HNO, to pH<2 <br /> Cool to 4°C <br /> Alkalinity 100 Plastic Cool to 4°C <br /> Chemical Oxygen Demand 50 Plastic H,SO4 to pH<2 <br /> Cool 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,SO4 to pH<2 <br /> Cool to 4°C <br /> Hardness' 100 Plastic HNO, to pH<2 <br /> Cool to 4°C <br /> Nitrate-Nitrogen 100 Plastic HNO, to pH<2 <br /> Cool to 4°C <br /> Sulfate 50 Plastic Cool to 4°C <br /> Sulfide 500 Plastic 2 ml zinc acetate <br /> Cowl to 4°C <br /> Total Dissolved Solids 100 Plastic Cool to 4°C <br /> Total Organic Carbon 25 Glass with Teflon-lined HNO, to pH<2 <br /> Septum Cowl to 4°C <br /> t 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 through a 0.45-micron acrylic copolymer filter before preservation. <br /> 3 Plastic=linear polyethylene. <br /> SAC/pj0\0939\09390040.8el-95 1fc:3 <br />