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k" KLEINFELDER <br /> B-5 Vadose Zone Monitoring <br /> l - i checked and <br /> Prior to conducting lysitneter salnplrng, the pressure-vacuum equipment s <br />' cleaned A Soil-Moisture hand pump with a pressure-vacuum gage is used to measure <br /> residual and implied pressure-vacuum Nitrogen gas is used to purge the lysimeter <br /> system tot sampling An an pump is available as a back up <br /> 2 Approximately one week to one month prior to conducting the sampling, the residual <br /> piessuies at the air-line of each lysrmeter aie measured ad the vacuums reset to <br /> manufactuicd recommended Value (usually 50 centlbars) The measurements and applied <br /> vacuums aic noted on a sampling log form Kleinfelder ]las found that resetting the <br /> lyslmeters vacuums before the sampling yields good sample recovery <br /> 3 The residual pressures are measured fust prior to collecting the sample The water line is <br /> then opened and nitrogen gas applied to the air line until either fluid or air is discharged <br /> (for dry lysirneters) Fhe sample is contained in a 1 liter unpreserved bottle and the <br /> volume recovered is estimated The fluid is then poured into appropriate preserved or <br /> unpreserved bottles of the requested analysis <br /> 4 After the sample is collected, the lysrmeter vacuum is reset to the manufacturer's <br /> recommended value The lvsrnletei is also tested to evaluate potential leaks that may <br /> cause vacuum pressure loss <br /> B-G Leachate Monitoring <br />' 1 The leachate iiser or wells are first opened and allowed to equilibrate with the <br /> atmosphere <br />' 2 The leachate elevation is then rllcasured from a set location using a conductivity-based <br /> Nvatei-level meter The level is generally pleasured from a surveyed mark on the north <br /> I 1111 of the L S111g <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 transport to the <br /> analytical laboratory ['he sample. 1s logged on a chain-of-custody <br /> 1 � <br /> t20-1108-24 E01/2019R 120 Page B-7 <br /> 01999,Klejnre]dLr, Inc r'ebruary 5, 1999 <br /> 1 <br />