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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 25 Plasticl, Glass Refrigerate Analyze <br /> to 4°C Immediately <br /> Color 25 Plastic, Glass Refrigerate Analyze <br /> to 4°C Immediately <br /> Odor 25 Plastic, Glass Refrigerate Analyze <br /> to °C Immediately <br /> Specific 100 Plastic, Glass Refrigerate 28 Days <br /> conductance to 4°C <br /> Chloride 50 Plastic, Glass None Required 28 Days <br /> Total dissolved solids 500 Plastic, Glass Refrigerate 48 Hours <br /> to 4°C <br /> Total hardness 100 Plastic, Glass HNO3 to pH<2 6 Months <br /> Nitrate-nitrogen 100 Plastic, Glass Refrigerate 48 Hours <br /> to 4°C <br /> Total Kjeldahl 100 Plastic, Glass Refrigerate to 28 Days <br /> nitrogen 4°C, H2SO4 to <br /> pH<2 <br /> PJ9 9390207.00D A-6 <br />