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fS <br /> Lie <br /> w <br /> A•2 <br /> 2.2MOMORING MLL INWALTATION,7 SAMPLING <br /> Each soil boring was completed as a grvind water monitoring well constructed of 44nc}s diameter,Schedule <br /> ii <br /> 40 PVC casing. Each monitoring sell was surged prior to placement of the annular seal. The wells vera <br /> .•• developed by removing a minimum of six well volumes with a stainless stsel bailer. <br /> l � i <br /> A water/petroleum product interface probe was used to evaluate the presence of I uid•phase hydrocarbon <br /> and measure the depth to ground water in each well. If a liquid-phase hydrocarbon layer was not detected <br /> by the interface probe,the tip of the probe was subjectively analyzed for a sheen. Depth to ground water <br /> } was measured to the nearest 0.41 foot. <br /> i Ground water samples were collected with clean, disposable p'astic bailers. Samples were stored in <br /> Y appropriate containers with the proper preservative for the intended analysis,and were placed in an ice cilest <br /> r" cooled to at least 4 degrees centigrade until delivery to a Callrornia-certifed laboratory. A chain-of-custody <br /> t: <br /> document was used to record possession of tha samples from the- time of collection to arrival of the <br /> laboratory. <br /> Each well riser was surveyed to the nearest 0.01 foot. The survey point on each well riser was notched so <br /> t that subsequent water level measurements can be taken from;,he same reference point. The well risers were <br /> swryeyed relative to California Department of Transportation Benchmark#161SL(elevation m Q.728 foot <br /> a above mean sea level), located at the northeast corner of Ryde Avenue and Country Club 13oulevard <br /> ray <br /> (Figure 3). <br /> 1., <br /> j <br /> All soil cuttings,auger rinsate,and purge water were drummed and stored on-site pending determinations <br /> # of the most suitable methods of disposal. <br /> f4 <br /> 1 <br /> f <br /> W <br /> A' s <br /> � . <br /> G <br />