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APPENDIX F <br /> GENERAL FIELD PROCEDURES-YELL DEVELOPMENT, <br /> WATER SAMPLING, AND WATER S:thy?LING SURVEY FORMS <br /> r2rgUnd-Water Monitoring Well nizyelo2 ent <br /> The ground water monitoring wells were initially developed to <br /> clean the well and to stabilize the sand and aquifer <br /> materials around the slotted section of the well. Well <br /> development was conducted with a diaphragm pump. <br /> The ground water generated from the development process was <br /> placed into labeled 55-gallon drums pending laboratory <br /> results of the ground water samples, to determine the <br /> appropriate disposal method. Disposal of the ground water <br /> will conform to applicable hazardous waste requirements. <br /> Ground Water Monitor; g kEellSa 'nom <br /> Prior to purging and sampling the wells, the depth to ground <br /> " water in each well was measured from the top of casing to the <br /> nearest 0.O1 foot using an electronic sounder. Ground water <br /> samples were collected and observed for the presence of free <br /> product or sheen. <br /> ' Water samples were collected after more than 4 casing volumes <br /> of ground water were purged frr-A each well Each sample was <br /> collected using a clean mailer, and then transferred into the <br /> appropriate clean sample containers for delivery to a <br /> California certified laboratory, following proper to <br /> preservation and chain-of-custody procedures. The sample was <br /> s_. labeled with sample identification, sample depth, geologist's <br /> initials, and date of collection. <br /> E � <br /> .r <br />