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TO E RO E K SOP No.021,REV.1 „ SOIL GAS SAMPLING METHODS ASSOCIATES,INc. PAGE 2 1.5 REQUIREMENTS AND RESOURCES When using the Tedlar®bag collection method, the following items are needed: • A sampling port and attached sampling line, ready for sampling. • A pump (SKC universal flow pump or equivalent), capable of pumping at least 3 liters per minute (L/min)to allow purging of the sample point prior to collecting a soil gas sample. • Sampling lines (dedicated, 0.375-inch outer diameter Tygon®tubing or equivalent such as Teflon®)to connect all field equipment. • Y-branched plastic (Teflon®-lined if available) sampling hose for duplicate collection. • 500-cubic-centimeter(cc) Tedlar®bags, with metal fittings. • Vacuum chamber. • Leak check compound. When using syringes to collect soil gas, the following items are needed: • A supply of clean graduated syringes. • Plastic 3-way valve. • Aluminum foil. • Leak check compound. When using Summa canisters to collect soil gas, the following items are needed: • A supply of clean, evacuated Summa canisters with a pressure gauge to verify internal vacuum and flow controller(integrated flow controller pressure gauge may be used). • A vacuum pump (SKC universal flow pump or equivalent)to allow purging of the sample point prior to collection of soil gas samples. • Tygon®or equivalent tubing of appropriate size for connecting the sampling port to pump (during gas point purging) and the sampling port to stainless steel canister(during sample collection). • Swagelok"T" for duplicate collection. • Leak check compound. When using sorbent tubes to collect soil gas, the following items are needed: • A supply of sorbent tubes with the appropriate media. • A pump (SKC universal flow pump or equivalent), capable of pumping at least 3 L/min to allow purging of the sample point prior to collection of samples, with a low-flow adapter for sample collection(10 to 200 milliliters per minute [mL/min]), or two separate pumps.