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TABLE OF CONTENTS <br />I. INTRODUCTION........................................................................... <br />II. PURPOSE OF SAMPLING GUIDANCE ........................................ <br />III. QUALITY CONTROL FIELD SAMPLE TYPES ........................... <br />FIELDBLANK................................................................................... <br />TRIPBLANK..................................................................................... <br />IV. SAMPLING ACTIVITIES............................................................ <br />AVOID SAMPLE CONTAMINATION................................................. <br />BEFORESAMPLING........................................................................ <br />SAMPLE COLLECTION PRECEDURE............................................. <br />AFTERSAMPLING........................................................................... <br />SAMPLE SHIPPING.......................................................................... <br />ATTACHMENTA................................................................................... <br />i <br />..................................... 1 <br />..................................... 2 <br />..................................... 2 <br />..................................... 2 <br />..................................... 3 <br />..................................... 3 <br />..................................... 4 <br />..................................... 4 <br />..................................... 5 <br />..................................... 6 <br />................................... 7 <br />19E-20 <br />