Laserfiche WebLink
• <br /> placed over the positive meniscus to eliminate air. After the bottle was capped, it was <br /> inverted and tapped to verify that it contained no air bubbles. The sample containers for <br /> other parameters were filled, filtered as required, and capped. <br /> When required, dissolved concentrations of metals were determined using appropriate <br /> field filtration techniques. The sample was filtered by emptying the contents of the Teflon <br /> bailer into a pressure transfer vessel. A disposable 0.45-micron acrylic copolymer filter <br /> was threaded onto the transfer vessel at the discharge point, and the vessel was sealed. <br /> Pressure was applied to the vessel with a hand pump and the filtrate directed into the <br /> appropriate containers. Each filter was used once and discarded. <br /> Sample Preservation and Handling <br /> The following section specifies sample containers, preservation methods, and sample <br /> handling procedures. <br /> Sample Containers and Preservation <br /> ® Sample containers vary with each type of analytical parameter. Container types and <br /> materials were selected to be nonreactive with the particular analytical parameter tested. <br /> Sample Handling <br /> Sample containers were labeled immediately prior to sample collection. Samples were <br /> kept cool with cold packs until received by the laboratory. At the time of sampling, each <br /> sample was logged on an ARCO chain-of-custody record that accompanied the sample to <br /> the laboratory. <br /> Samples that required overnight storage prior to shipping to the laboratory were kept cool <br /> (4°C) in a refrigerator. The refrigerator was kept in a warehouse, which was Iocked when <br /> not occupied by an EMCON employee. A sample/refrigerator log was kept to record the <br /> date and time that samples were placed into and removed from the refrigerator. <br /> Samples were transferred from EMCON to an ARCO-approved laboratory by courier or <br /> taken directly to the laboratory by the environmental sampler. Sample shipments from <br /> EMCON to laboratories performing the selected analyses routinely occurred within <br /> 24 hours of sample collection. <br /> • <br /> CPO:1QMR13RDQTR-112186Q398.DOC-9"sg:I A-4 Rev.0,11/30/98 <br />