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Vapor Intrusion Assessment Work Plan Project number:60653972 <br /> Table 4. Sample Container and Holding Time Requirements for VOC Analyses <br /> Holding <br /> Methods Matrix Sample Container Volume Preservative Time <br /> TO-15 Soil Gas 1-liter canister 1 liter None 30 days <br /> TO-15 SIM Indoor Air 6-liter canister 1 liter None 30 da s <br /> Notes: <br /> Analyses with similar container and preservation requirements may be combined into one container. <br /> The holding time is from the time/date of sample collection. <br /> SIM = Selective Ion Monitoring <br /> VOC= volatile organic compound <br /> Prepared for: California Regional Water Quality Control Board,Central Valley Region AECOM <br />