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chemical stability, the possibility of contamination, and environmental and storage conditions. Standards will be labeled with expiration dates and will reference primary standard sources, if applicable. The laboratory will discard expired standards. 5.1.3 Supplies All supplies will be inspected before use in the field or laboratory. The descriptions for sample collection and analysis are found in Workplan Sections 6.1 and 6.2 and will be used as a guideline for establishing the acceptance criteria for supplies. A current inventory and appropriate storage system for these materials will verify their integrity before use. Efficiency and purity of samples will be monitored through the use of standards and blank samples. 5.1.4 Holding Time Compliance Sample extraction and analysis will be completed within the required method holding times (Table 1). Holding times begin at the time of sample collection. If holding times are exceeded and the analyses are performed, the associated results will be qualified as described in the applicable validation procedure. The following definitions of extraction, and analysis compliance are used to assess holding times: • Preparation or extraction completion: completion of the sample preparation process as described in the applicable method, before any necessary extract cleanup; and • Analysis completion: completion of all analytical runs, including dilutions, second column confirmations, and required reanalyses. Table 1 Tabulation of Sample Types,Analytical and Preservation Methods, and Holding Times Sample Type Analytical Method Container Preservation Holding Time Method System Influent, USEPA TO-15 Tedlar bag Store away from 3 days Effluent and Vapor 1 liter Summa light Samples Groundwater I USEPA 8260B 40 ml VOA vial Maintain at 40 C 14 days Environmental/LNC/Workplan/Appendix3.wpd 8