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KIRTLAND AIR FORCE BASE ALBUQUERQUE, NEW MEXICO ...

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APPENDIX B<br />

SOP B1.11<br />

Equipment Decontamination<br />

The objective of field decontamination is to remove contaminants of concerns from sampling, drilling<br />

and other field equipment to concentrations that will not impact study objectives. This SOP was<br />

developed for use by field personnel who are responsible for cleaning sampling or other equipment in the<br />

field.<br />

Specification for Decontamination Materials<br />

Use a standard brand of phosphate-free laboratory detergent, either liquid or powder,<br />

preferably Liquinox ® or (Alconox ® ).<br />

Use tap water from any municipal water treatment system or use bottled drinking water. Soap<br />

and tap water will remove the gross contamination from the sampling equipment.<br />

Handling and Containers for Cleaning Solutions<br />

Improperly handled cleaning solutions may easily become contaminated, thereby jeopardizing the<br />

validity of the sample data. Containers should be constructed of the proper materials to ensure their<br />

integrity. The following containers should be used for storing the specified cleaning materials:<br />

Soap—Keep in clean containers until use. It should be poured directly from the container<br />

into the wash bucket or tub.<br />

Tap water—Keep in clean tanks, hand-pressure sprayers, or squeeze bottles, or apply directly<br />

from a hose.<br />

Deionized water—Store in clean containers that can be closed when not in use. It may be<br />

applied from squeeze bottles.<br />

Decontamination of Large Equipment<br />

The following procedure will be used to decontaminate large pieces of equipment, such as casings, auger<br />

flights, pipe and rods, and those portions of the drill rig that may stand directly over a boring or well<br />

location or that come into contact with casing, auger flights, pipe, or rods. This procedure shall also be<br />

employed for the decontamination of heavy machinery such as backhoes, excavators, etc.<br />

Wash the external surfaces of equipment with high-pressure hot water and Liquinox ® or<br />

Alconox ® or equivalent non-phosphate, laboratory-grade detergent. If necessary, scrub until<br />

all visible dirt, grime, grease, oil, loose paint, rust flakes, etc., have been removed. The<br />

inside surfaces of equipment which come in direct contact the media being sampled will also<br />

be washed as described above. Specific decontamination instructions will be included in the<br />

project-specific addenda.<br />

Rinse with potable water.<br />

This decontamination procedure will be performed before equipment is used and between<br />

each well or other sampling locations.<br />

Kirtland AFB<br />

SOPs for Field Investigations B-75 April 2004

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