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Environmental Remediation Drilling

Safety Guidelines

Page 87 of 132

4.16.4 - Field Sampling Equipment Cleaning Procedures cont.

This procedure can be expanded to include additional or alternate solvent rinses that will remove specified

target compounds if required by site-specific work plans or as directed by a particular client.

Table 4.2 - Decontamination Solvents Table

Solvent Soluble Contaminants

Water

Low-chain compounds

Salts

Some organic acids and

other polar compounds

Dilute Bases

• Detergent

• Soap

Acidic compounds

Phenol

Thiols

Some nitro and sulfonic

compounds

Organic Solvents (note: some

solvents can degrade or

permeate protective clothing)

• Alcohols (methanol)

• Ethers

• Ketones

• Aromatics

• Straight-chain alkanes

(hexane)

• Common petroleum products

(fuel oil, kerosene)

Non-polar compounds (such

as some organic

compounds)

Special considerations for solvents:

• Solvent rinses are not necessarily required when organics are not a contaminant of concern.

• An acid rinse is not necessarily required if analysis does not include inorganics.

• Always reference appropriate analytical procedure for specific decontamination solutions required for

adequate removal of the contaminants of concern.

• Sampling equipment that requires the use of plastic or Teflon tubing should be disassembled, cleaned,

and the tubing replaced with clean tubing, if necessary, before commencement of sampling or between

sampling locations.

• The use of distilled or deionized water may be acceptable for decontamination of sampling equipment

provided that it has been verified by laboratory analysis to be analyte-free distilled or deionized water.

• The use of an untreated potable water supply may not be an acceptable substitute for tap water.

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