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I <br /> kn KLEINFELDER <br /> i <br /> 4. After the sample is collected, the lysimeter vacuum is reset to the manufacturer's <br /> recommended value. The lysimeter is also tested to evaluate potential leaks that <br /> may cause vacuum pressure loss. <br /> A-6 Leachate Monitoriing <br /> 1. The leachate riser or wells are first opened and allowed to equilibrate with the <br /> atmosphere. <br /> 2. The leachate elevation is then measured from a set location using a conductivity- <br /> based water-level meter. The level is generally measured from a surveyed mark <br /> on the north rim of the casing. <br /> 3. A leachate sample is then collected using a clean, disposable bailer. <br /> 4. The sample is labeled and immediately stored in an iced cooler pending <br /> transport to the analytical laboratory. The sample is logged on a <br /> chain-of-custody. <br /> A-7 Surface Water Monitorlina <br /> 1. Prior to collecting surface water samples, the depth of water is estimated at a <br /> designated location in the surface water body. <br /> 2. Surface water samples are collected directly from the stream or surface water <br /> using a clean unpreserved plastic bottle, disposable bailer, bailer, coliwasa, <br /> DipstikTm, dipper, peristaltic pump, etc., or by directly filling the sample <br /> containers. Sampling equipment will either be disposable, dedicated or <br /> decontaminated in accordance with the above-defined decontamination <br /> protocols. Care is taken not to disturb the stream bottom and introduce <br /> sediment in the sample. The fluid is then poured into appropriate preserved or <br /> unpreserved bottles for the requested analysis. <br /> 3. The sample is labeled and immediately stored in an iced cooler pending <br /> transport to the analytical laboratory. The sample is logged on a <br /> chain-of-custody. <br /> A-8 TANK REMOVAL SAMPLING <br /> A-8.1 Collection of Soil Samples and Laboratory Analysis <br /> Soil and water samples will be collected during the tank removal operations in <br /> accordance with the current Leaking Underground Fuel Tank Field (LUFT) Manual and <br /> the Tri-Regional Guidelines issued by the California Regional Water Quality Control <br /> Board (RWQCB). <br /> i <br /> A Kleinfelder, environmental geologist will be on site during the tank removal activities <br /> to collect soil samples for qualitative field screening and laboratory analysis. Tank <br /> 12280.MON15T06R0701CD:Iv Page A-7 <br /> 0 2006 Kleinfelder, Inc. February 16,2006 <br />