EP 1110-1-27
27 Jan 00
EXTRACTION, INJECTION, AND MONITORING WELLS
12/16/99
Introduction
This checklist is meant to evaluate the adequacy of maintenance of the extraction and monitoring wells on
site. The adequacy of the extraction system should be evaluated using the Ground Water Extraction
Subsurface Performance Checklist. The adequacy of the monitoring network should be evaluated using the
Environmental Monitoring Checklist.
References
EM 1110-1-4000 Monitor Well Design, Installation, and Documentation at HTRW Sites
ETL 1110-1-201 Ground Water Extraction
Current Operating Conditions and/or Configuration
Record any deviations from as-builts ____________________________________________________
___________________________________________________________________________________
___________________________________________________________________________________
Adequacy of Operations and Maintenance:
Wellheads Protected from Standing Surface Water? ____
Is there settlement around the well (i.e. due to inadequate compaction or aquifer consolidation)? ____
Above-ground wellheads painted and clearly labeled? ____
Vault covers and vaults in good repair and clearly labeled? ____
Wellhead enclosures painted, well maintained, and clearly labeled? ____
Are concrete pads around the well in good condition? ____
Has there been physical damage to the well? ____
Is there evidence for frost heave/jacking of the protective casing or well casing? ____
Is there a regular program for evaluating the performance of the well (check specific capacity and
accumulated sediment)? ____
Is there evidence of degradation of well performance? ____
What was the original specific capacity and how does it compare to the current capacity?
Is there a regular program to evaluate down hole conditions (e.g., camera survey) ____
Have BART tests or other bacteriological tests been utilized to evaluate biofouling? ____
For injection wells only, has the treated/injection water been tested for the potential to cause inorganic
precipitation? ____
Is there a regular well maintenance program? ____
If so, What is the well maintenance protocol: _________________________________________
___________________________________________________________________________________
Can the prescribed well maintenance be carried out given the layout of the well and the available personnel
and equipment? ____
When was the well last developed and when will it be redeveloped? ____
Is there evidence of well or drop pipe corrosion? ____
Is there an up-to-date logbook for recording performance & maintenance for each extraction well? ____
How many gallons of water has the well pumped since it was installed? ____
Is there a maintenance schedule for the pump and how is it documented? ____
Has there been excessive pump wear noticed due to sediments? ____
Are all of the flow meters/totalizers in good working order? ____
Is there an inventory of appropriate spare parts for the pumps and related equipment? ____
Is there evidence suggesting the lines between the wells and the plant are occluded? ____
Sheet 1 of 2
Plate D-6
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