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} verify that it contained no air bubbles The sample containers for other parameters were filled, filtered as required, and capped When required, dissolved concentrations of metals were determined using appropriate field filtration techniques When a Teflon bailer was used, the sample was filtered by emptying the contents of the bailer into a pressure transfer vessel A disposable 0 45-micron acrylic copolymer filter was threaded onto the transfer vessel at the discharge point, and the vessel was sealed Pressure was applied to the vessel with a hand pump and the filtrate directed into the appropriate containers Each filter was used once and discarded When a bladder pump was used to collect samples for dissolved constituents, filtering was performed by attaching a disposable 0 45-micron acrylic copolymer filter directly to the pump effluent line with a pressure fitting As the pump cycled, the effluent was pressured through the filter and directed into the appropriate containers Each filter was used once and discarded Sample Preservation and Handling The following section specifies sample containers, preservation methods, and sample handling procedures Sample Containers and Preservation Sample containers vary with each type of analytical parameter Container types and materials were selected to be nonreactive with the particular analytical parameter tested Sample Handling Sample containers were labeled immediately following collection Samples were kept cool with cold packs until received by the laboratory Cold packs were replaced each day to maintain refrigeration At the time of sampling, each sample was logged on a Chain-of-Custody Record that accompanied the sample to the laboratory Samples were transferred from the site to a state-certified laboratory by the sampling team Sample shipment from EMCON Associates (EMCON) to laboratories performing the selected analyses routinely occurred within 24 hours of sample receipt The laboratory manager checked the holding times for requested analyses so that they were not exceeded Sample Documentation The following procedures were used during sampling and analysis to provide chain-of-custody control during sample handling from collection through storage Sample documentation included the use of the following 0 Field logbook to document sampling activities in the field SAC/pj2\252(1\25201000 lac 94 pac 9 A-4 Rev 0 07/27/94