Laserfiche WebLink
Clayton Group Services <br />The following procedures are designed to be used for decontamination of field equipment <br />used in the sampling of soils and groundwater. It is generally applicable to <br />decontamination of chemical (organic and inorganic) contaminants, but not for use at <br />radioactive sites. <br />Decontamination shall follow ASTM standards, Designation D 5088 - 90 - Standard <br />Practice for Decontamination of Field Equipment Used at Nonradioactive Waste Sites. <br />By reference, this standard is incorporated into these Standard Operating Procedures. <br />The ASTM standards provide for two different procedures, one for decontamination of <br />sample -contacting and the other for non -sample contacting equipment. The procedures <br />outlined below are for the more stringent procedures for cleaning sample -contacting <br />equipment. <br />PROCEDURES <br />1. Prepare a site-specific equipment decontamination protocol since the decontamination <br />procedure depends, to some extent, on the type(s) and concentration of contaminants <br />expected to be present and concerns of the site-specific Health and Safety Plan. <br />QA/QC procedures should be followed. <br />2. Wear protective clothing and other protective gear appropriate to the job and observe <br />other safety measures as directed by the site Safety Officer. <br />3. Depending on the type of contamination, assemble materials that are required to <br />support decontamination to include (not all steps may be necessary): <br />• Detergent (non -phosphate such as Alquinox® or LiquinoxO). <br />• Acid rinse for inorganic desorbing (10% nitric or hydrochloric acid solution made <br />from reagent grade nitric or hydrochloric acid and deionized water). <br />• Solvent rinse for organic desorbing (isopropanol, acetone, or methanol). <br />• Tap water. <br />• Distilled/deionized water. <br />• Person safety gear. <br />