WSP01544

• File Number: 8170
• Description: Arkansas Basin Water Quality Issues
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 1/1/1996
• Author: Bradford Austin
• Title: Report to the Commissioner of Agriculture - Colorado Department of Agriculture - Ground Water Monitoring Activities - Arkansas River Valley Alluvial Aquifer - 1994-1995
• Water Supply Pro - Doc Type: Report/Study

The sampling survey was conducted by:

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0298
FIELD OPERATIONS

SCHEDULING

All wells were scheduled for sampling by WQCD personnel between June and November,
1994. The exact dates for sampling were subject to laboratory schedules, sample holding times,
well owner availability, and travel times.

SAMPLE WELL SELECTION

The rationale used in selecting wells for this monitoring project are listed below.

I. Low flow, shallow depth wells are prefered, generally domestic use;
2. Completed within the unconfined alluvial aquifer of the Arkansas Valley;
3. Located within the irrigated agricultural area of the valley;
4. Depth to ground water less than 50 feet, generally less than 25 feet;
5. Well currently in use or at least has a working pump installed;
6. Direction of ground water flow;
7. Wellhead and casing in good physical condition and availability of completion
information documentation;
8. Wellhead area free of point sources of contamination;
9. Well owner consent to participate in the monitoring program;

The ground water contaminants that may be encountered in the area include nitrates, high
levels of total dissolved solids, dissolved metals, and pesticides.

KEy PERSONNEL

Brad Austin, Ground Water Geologist and Program Manager
John Colbert, Physical Sciences Tech

SITE ACCESS AND LOGISTICS

Access to the sampling sites and scheduling with land owners will be the responsibility of
the field personnel. Consent for access to the property and for sampling the well will have been
received prior to site entry.