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1 <br /> ARCADIS Brian Taylor, P.G. <br /> February 2, 2009 <br /> 1 <br /> for representative sampling.ARCADIS will then activate the trigger and retrieve the <br /> samples. Samples will be placed on ice and submitted to a State of California <br /> certified laboratory under chain-of-custody documentation for analysis. <br /> HydraSleeve® <br /> The HydraSleeve®groundwater sampler collects a whole water sample from a <br /> specified interval and is suitable for a wide range of organics and inorganics. One or <br /> more HydraSleeve®are placed within the screened interval of the monitoring well, <br /> and a period of time is allocated for the well to re-equilibrate. Hours to months later, <br /> the sealed HydraSleeve®is pulled upward,which enables water to enter the check <br /> valve into the sample sleeve,The HydraSleeve®collects a sample with minimal <br /> drawdown, agitation and displacement of the water column. HydraSleeve®samplers <br /> consist of three basic components: a reusable weight; a long,flexible, lay-flat sample <br /> sleeve; and a self-sealing valve. <br /> Once the sampler is full,the one-way reed valve collapses, preventing non- <br /> representative water from entering.The bottom of the flexible tube is sealed and the <br /> weight is attached to it. Following retrieval from the well,the sample is opened by <br /> using the discharge tube provided by the manufacturer.The tube is pushed into the <br /> sleeve, and the sample is decanted to the glassware for shipment to the analytical <br /> laboratory. <br /> Sampling event <br /> Using the HydraSleeve®technology, ARCADIS will place a HydraSleeve®across <br /> the mid-point of the well screen interval.The well will then be allowed to equilibrate <br /> for 72 hours prior to collecting the sample. ARCADIS will then retrieve the <br /> HydraSleeve®and decanted the water using the manufacturer supplied discharge <br /> tube to laboratory supplied glassware, placed on ice, and submitted to a State of <br /> California certified laboratory under chain-of-custody documentation for analysis. <br /> Grab Groundwater(No Purge) <br /> Grab groundwater sampling utilizes a disposable polyethylene bailer to retrieve a <br /> groundwater sample.The bailer is lowered into the monitoring well and submerged <br /> into the water column. Once the bailer is filled with water a gravity driven check valve <br /> at the bottom of the bailer closes to contain the water sample.The bailer is then <br /> retrieved and the water is decanted into the sample containers. <br /> 1 <br /> Page: <br /> 3/5 <br /> fypp.�q�yyWp»,npGgk'NJfiNEYA0M1WI6t1Y RaWe,dIMWUFPWNPP I,ryMnlMkn`RAP ImOIemmWEon Ray�1N91P1A We <br /> i <br />