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IWAPI, N%1W initial elevation. Where water level recovery is slow, the sample will be collected after stabilization is achieved and enough water is present to fill sample container. Cross contamination from transferring pumps (or bailers) from well to well will be avoided by utilizing dedicated equipment. Where this is not feasible, thorough cleaning of equipment will be performed between sampling rounds. Sampling will proceed from the least contaminated to the most contaminated well, if information is available before sample collection, or if it is indicated by evidence. Where several types of analysis will be performed for a given well, individual samples will be collected in the following order: 1. Volatile organics 2. Purgeable organic hydrocarbons 3. Purgeable organic halogens 4. Total organic hydrocarbons 5. Total organic halogens 6. Extractable organics 7. Total metals 8. Dissolved metals 9. Phenols 10. Cyanide The specific analytical methods to be utilized for the common volatile/semivolatile analyses are shown on Table 2. Groundwater samples will be collected with a teflon bailer with bottom emptying device. Duplicate samples will be transferred to vials or containers that meet Regulatory Agency specifications (Table 1). Groundwater from the bailer will be transferred to the sample container by allowing the fluid to flow slowly along the sides of the vessel. All containers will be filled above the top of the opening to form a positive meniscus. No head space should be present in the sample container once it is sealed. After the vial is capped it will be inverted to chech for air bubbles. If bubbles are present the sample will be discarded and replaced. If it is not possible to collect a sample without head space, the problem will be noted on the field technicians's sampling log. Immediatedly following sample collection, samples will be labeled and stored in an ice chest containing frozen chemical ice sealed in plastic bags. Sample labels will contain the following information: date, time, project ID, sample ID, and name of sampler and type of analysis. All samples will be transported under chain of custody protocol to a state certified laboratory within 24 hours. A sample container filled in the laboratory with organic free water and carried unopened during the sampling trip will also be provided (Trip Blank). A "high -low" temperature recording thermometer will accompany sample shipments to ensure proper sample temperature maintenance. 8