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li <br /> APPENDIX C : PROTOCOL FOR �ROUNDWATER SAMPLING <br />+ 4 <br /> r <br /> Inspect well cap cover and casing to insure integrity of the <br />! system. If the integrity has be4n compromised . contact <br /> the Du Pont representative with tesponsibility for the <br /> site. <br /> Determine depth to water and record n Field Notes Sheets , <br /> Appendix G and Appendix H . <br /> Connect generator to submersible pum and pump the appropriate <br /> l q <br /> number of well volumes of water . The appropriate number <br /> of well volumes will be determin d for each well by pumping <br /> until pH and dissolved oxygen have stabilized . If using <br /> nonstandard monitoring wells , clean the bailing system in <br /> detergent , rinse six times in clean water and three times in <br /> distilled water or rinse with a 4team cleaner. Next , bail <br /> rt <br /> out 4 well volumes , and obtain the samples as aseptically as <br /> possible . Special in Will be provided by Du Pont . <br /> Allow well to recharge , i�f necessary <br /> Always collect samples for microbiological analyses first to <br /> avoid any possibility.iof surface or other contamination. <br /> Attach sterile Tygons tubing to outlet of pump . <br /> Collect 100 mL into a sterile bottle and seal . <br />�__ II <br />