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pressure transfer vessel. A disposable 0.45-micron acrylic copolymer filter is threaded onto the <br /> transfer vessel at the discharge point and the vessel is sealed. Pressure is applied to the vessel <br /> with a hand pump and the filtrate is directed into the appropriate containers. Each filter is used <br /> once and discarded. <br /> When using a bladder pump to collect samples for dissolved constituents, the sample is filtered <br /> by attaching a disposable 0.45-micron acrylic copolymer filter directly to the pump effluent line <br /> with a pressure fitting. As the pump cycles, the effluent is pressured through the filter and <br /> directed into the appropriate containers. Each filter is used once and discarded. <br /> Spring (or Surface Water) Sampling <br /> If sufficient flow is observed, spring (or surface water) samples are collected with a dipper <br /> consistent with the procedures listed in Section 9 of"Test Methods for Evaluating Solid Waste: <br /> Physical/Chemical Methods," SW-846, 3rd edition, November 1986. If low-flow conditions are <br /> encountered, a stainless steel scoop is used to collect samples. The flat bottom of the scoop is <br /> pressed against the bank and the water will flow with little disturbance into the scoop. Samples <br /> collected with a dipper or scoop are transferred into the appropriate sample containers. Spring (or <br /> surface water) samples are filtered as required. <br /> Leachate Sampling <br /> If leachate sampling and analysis is required, samples are collected after purging approximately <br /> one casing volume using a Teflon bailer. Leachate samples are filtered as required and <br /> transferred into the appropriate containers. <br /> Lysimeter Sampling <br /> If lysimeter sampling and analysis is required, a vacuum is applied to the lysimeters only if an <br /> electrical conductivity monitor indicates that the soil-moisture content and soil suction are adequate <br /> for attempting to collect a sample. Vacuum and pressure is alternately applied to the lysimeters <br /> over a 72-hour period to achieve the sample volumes required for analysis. If sufficient sample <br /> volume is not obtained within 72 hours,the lysimeter are recorded as dry for the monitoring period <br /> and suction will be reapplied during the next monitoring event. <br /> N:\Miscellaneous\Groundwater Info-All Sites\SAP_AppendixA.doc <br /> A-4 <br />