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Table A-1 <br />SAMPLE VOLUME, CONTAINER, PRESERVATIVE AND <br />HOLDING TIME FOR INDICATOR PARAMETERS <br />Volume Holding <br />Parameter Required (ml) Container Preservative Time <br />pH <br />25 <br />Plasticl, <br />Glass <br />Refrigerate <br />Analyze <br />to 4°C <br />Immediately <br />Color <br />25 <br />Plastic, <br />Glass <br />Refrigerate <br />Analyze <br />to 4°C <br />Immediately <br />Odor <br />25 <br />Plastic, <br />Glass <br />Refrigerate <br />Analyze <br />to 4°C <br />Immediately <br />Specific <br />100 <br />Plastic, <br />Glass <br />Refrigerate <br />28 Days <br />conductance <br />to 4°C <br />Chloride <br />50 <br />Plastic, <br />Glass <br />None Required <br />28 Days <br />Total dissolved solids <br />500 <br />Plastic, <br />Glass <br />Refrigerate <br />48 Hours <br />to 4°C <br />Total hardness <br />100 <br />Plastic, <br />Glass <br />HNO3 to pH<2 <br />6 Months <br />Nitrate -nitrogen <br />100 <br />Plastic, <br />Glass <br />Refrigerate <br />48 Hours <br />to 4°C <br />Total Kjeldahl <br />100 <br />Plastic, <br />Glass <br />Refrigerate to <br />28 Days <br />nitrogen <br />4°C, H2SO4 to <br />pH<2 <br />PJ9 9390207.00D A-6 <br />