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TO E RO E K SOP No.005,REv.2 ASSocmns,INC BULK MATERIALS SAMPLING I PAGE 5 5. If the material is cohesive, rotate the implement once or twice to cut a core of material. 6. Slowly withdraw the implement, making sure the slot or blade is facing upward. 7. If composite sampling is required, repeat steps 4 through 6 at different points two or more times. Combine the samples in a stainless-steel bowl or similar container. 8. Transfer the sample into the labeled container using a stainless-steel or plastic spoon, spatula, or similar tool. 9. Ensure that a Teflon® liner is present in the cap of the sample container cap, if required. Secure the cap tightly on the sample container. 10. Complete all chain-of-custody documents, field logbook entries, and packaging requirements. 11. Decontaminate all non-disposable sampling implements after each use and between sampling locations using the procedures in SOP No. 002, General Equipment Decontamination. 2.2 SAMPLING BULK MATERIALS WITH A GRAIN THIEF A grain thief is used for sampling powdered or granular materials in bags,fiber drums,sacks, or similar containers. This sampler is useful when the material contains particles no greater than 0.25 inch in diameter. A grain thief (Figure 2) consists of two slotted, concentric, telescoping tubes, usually made of brass or stainless steel. The outer tube has a conical, pointed tip on one end that permits the sampler to penetrate the material being sampled. The sampler is about 24 to 40 inches long and 0.5 to 1 inch in diameter. Grain thieves are commercially available from laboratory supply companies. The following procedure can be used to sample bulk materials with a thief: 1. Place all sampling equipment on plastic sheeting next to the sampling location. Sample containers should be selected in accordance with the requirements in SOP No. 017, Sample Collection Container Requirements. 2. Wear appropriate protective clothing and gear. Use an HNu® or OVA®to monitor for levels of volatile organic vapors that may be present in accordance with SOP No. 003, Organic Vapor Air Monitoring. 3. Affix a completed sample container label to an appropriate sample container. 4. Insert a clean grain thief in the closed position into the material. Insert it from a point near the top edge or corner of the material,through the center,and to a point opposite the point of entry.