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KIRTLAND AIR FORCE BASE ALBUQUERQUE, NEW MEXICO ...

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APPENDIX B<br />

SOP B5.6<br />

Water Levels<br />

Water levels will be measured using an electric water level indicator. The steps to be followed are as<br />

follows:<br />

Check operation of recording equipment above ground. Prior to opening the well, don<br />

personal protective equipment as required.<br />

Record all information specified below on a Groundwater Level Data form or in the field<br />

logbook if the form is not available.<br />

Record well number, top of casing elevation and surface elevation if available. Well<br />

diameter and total depth should be recorded. Water levels will be taken from the surveyed<br />

reference mark on the top edge of the inner well casing.<br />

Use a decontaminated water level indicator to record water level to the nearest 0.01 ft (0.3<br />

cm).<br />

Record the time and day of the measurement.<br />

Many water level measuring devices have marked metal or plastic bands clamped at intervals<br />

along the measuring line used for reference points to obtain depth measurements. The<br />

spacing and accuracy of these bands will be checked frequently as they may loosen and slide<br />

up or down the line, resulting in inaccurate reference points.<br />

All groundwater level measurement devices must be cleaned before and after each use to<br />

prevent cross-contamination of wells.<br />

Kirtland AFB<br />

SOPs for Field Investigations B-135 April 2004

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