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GROUND ZERO ANALYSIS,INC. Quality Control/Quality Assurance Plan <br /> TABLE 3 <br /> Sample Container Guide and Holding Times—Soil Vapor <br /> Minimum Holding <br /> Analysis EPA Method Volume(mL) Container Preservative Times <br /> Volatile Organic <br /> Compounds <br /> including: BTEX, TO-15 400 Summa canister None 30 days <br /> MTBE, <br /> Napthalene, 1,1- <br /> DFA,PCE <br /> TO-3 400 Summa canister None 30 da s <br /> TPHg y <br /> Oxygen,nitrogen, ASTM D-1946 400 Summa canister None 30 days <br /> COz,methane <br /> mL=milliliter <br />