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' k'" KLEINFELDER <br /> manufactured recommended value (usually 50 centibars) The measurements and applied <br /> vacuums are noted on a sampling log form Kleinfelder has found that resetting the <br />' lysimeters vacuums before the sampling yields good sample recovery <br /> 3 The residual pressures are measured dust 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 lysimeters) The 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 lysimeter vacuum is reset to the manufacturer's <br />' recommended value The lysimeter is also tested to evaluate potential leaks that may <br /> cause vacuum pressure loss <br />' A-6 Leachate Monitoring <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-based <br /> water-level meter The level is generally measured from a surveyed mark on the north <br /> 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 transport to the <br /> analytical laboratory The sample is logged on a chain-of-custody <br />' A-7 Surface Water Monitorin <br /> 1 Prior to collecting surface water samples, the depth of water is estimated at a designated <br /> location in the surface water body <br /> 2 Surface water samples are collected directly from the stream or surface water using a <br /> clean unpreserved plastic bottle, disposable bailer, bailer, coliwasa, DipstikTM, dipper, <br /> peristaltic pump, etc , or by directly filling the sample containers Sampling equipment <br /> will either be disposable, dedicated or decontaminated in accordance with the above- <br /> defined decontamination protocols Care is taken not to disturb the stream bottom and <br />' introduce 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 transport to the <br /> analytical laboratory The sample is logged on a chain-of-custody <br /> 1 20-1417-16 E03/201 1 R259 Page A-7 <br /> CopyrighL 2001 Kleinfelder Inc February 28 2001 <br />