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Decontamination Protocols for Non-Disposable Sampling and Field Equipment Where appropriate, Paragon uses dedicated or single-use sampling equipment to obviate the need for field decontamination. Where such equipment is not available or appropriate, we use the following decontamination procedures for reusable equipment. Paragon or its subcontractors decontaminate all non-disposable sampling and field equipment that encounter water or soil before sample collection, before re-use, and at the end of each field sampling event. We store decontaminated equipment in clean environments, appropriate protective casings, or carefully wrap it in aluminum foil at the end of each field sampling event. Unless we have access to steam-cleaning equipment (which is our preferred method when possible), Paragon observes the following four-step minimum decontamination procedure for all non-disposable soil and groundwater sampling equipment: • Scrub using tap or distilled water and a non-phosphate detergent (such as Alconoxo); • Second rinse with tap or distilled water; • Third rinse with methanol; and, • Final rinse with distilled water. We use the following three-step decontamination procedure to clean the water-level meter prior to each use: • First rinse with tap or distilled water; • Second rinse with methanol; and, • Final rinse with distilled water.