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FIELD OPERATIONS <br />SCHEDULING <br />All wells were scheduled for sampling by WQCD personnel between June and November, <br />1994. The exact dates for sampling were subject to laboratory schedules, sample holding times, <br />well owner availability, and travel times. <br />SAMPLE WELL SELECTION <br />The rationale used in selecting wells for this monitoring project are listed below. I <br />1. Low flow, shallow depth wells are prefered, generally domestic use; <br />2. Completed within the unconfined alluvial aquifer of the Arkansas Valley; <br />3. Located within the irrigated agricultural area of the valley; <br />4. Depth to ground water less than 50 feet, generally less than 25 feet; ' <br />5. Well currently in use or at least has a working pump installed; <br />6. Direction of ground water flow; <br />7. Wellhead and casing in good physical condition and availability of completion <br />information documentation; <br />8. Wellhead area free of point sources of contamination; ' <br />9. Well owner consent to participate in the monitoring program; <br />The ground water contaminants that may be encountered in the area include nitrates, high <br />levels of total dissolved solids, dissolved metals, and pesticides. <br />KEY PERSONNEL <br />The sampling survey was conducted by: <br />Brad Austin, Ground Water Geologist and Program Manager <br />John Colbert, Physical Sciences Tech <br />SITE ACCESS AND LOGISTICS <br />Access to the sampling sites and scheduling with land owners will be the responsibility of <br />the field personnel. Consent for access to the property and for sampling the well will have been <br />received prior to site entry. <br />