Laserfiche WebLink
STANDARD OPERATING PROCEDURES FOR <br /> EQUIPMENT DECONTAMINATION <br /> Standard operating procedures used by The Twining Laboratories, Inc. (Twining) when <br /> decontaminating equipment are described below. Twining observes these procedures in <br /> order to obtain consistent, reliable data. <br /> Proper decontamination procedures reduce the potential for:(1)cross-contamination among <br /> sample locations; and (2) introduction of contamination from outside sources. <br /> Before, during, and following drilling operations, drilling equipment will be thoroughly <br /> cleaned using a high pressure hot water (steam) washer. Well casing, screen, end caps, and <br /> centralizers will also be cleaned using the steam washer. <br /> Sampling equipment and any tools, measuring devices, or other equipment which will <br /> contact soil, groundwater, or any media being assessed will be washed in a non-phosphate <br /> soap and water solution, and rinsed in de-ionized water before each use. The type of soap <br /> used will depend upon project requirements. <br /> Steam cleaning condensate will be containerized for later disposal. Generally, disposal will <br /> be the client's responsibility. <br />