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1�A6-Z4-gg 16 52 From WOODWARD CLYDE ¢rulnvu <br /> V=CICLT-73$ P 31/34 Jcb-402 <br /> C, nCl r aa,uiu,ub.• <br /> It is trttpvrtant to identify the purpose of groundwater sarrlpling before decisions regarding sampling <br /> Equipment selection, filtration,centrifugation or other phase separation techniques are made It is impomat <br /> • to ask the following questions prior to malung such decisions. <br /> Is the sampling event intended to determine the in-silo aqueous geochemistry? <br /> C� Is the sampling event intents to determine tris mobility of contamiina ids' <br /> 1 Decontaminate the APIS sampler using an :appropnato DECON protocol for the constituonts of a <br /> concern at the wail being sampled olid collect sampler blank. ' <br /> 3 r Install sample contatner(s)and close sampler snugly <br /> 3 Determine if wall meets minimum flow characteristics by either grain-size analysis, loss-tracer <br /> teat,flow motor,or othor appropriate means <br /> 4 Spread drop-cloth around wolf to be sampled to catch any potentiai sampling spills, uncap well <br /> and immediately gauge depth-to-water(OTW) <br /> 5 (for Resource Conservation and Recovery Act (RCRA) compliant samples) Attach TYGOWTMA ' <br /> tubing to ouhaust port and slow-purge the sampler vAth dry nitrogen than remove the TYGONTa <br /> tubing <br /> 6 Attach the sampler bail to a lowering device and deliver the sampler to the pre-aeterivned <br /> sampling dapth in the highest flow zone In the well, at a minimum lowering rate of 20 ft per <br /> minute Be careful not to lower the sampler too fast, the mby increasing turblolly 1 <br /> 7 At d®livery depth, allow the sampler to fill for a to 6 minutes, depending on the sampler model <br /> used - -- - - - <br /> A <br /> $ Retrieve tha sampler remove the lowering device and place the sampler in the carrying case <br /> upright holder <br /> 9 (for RCRA Samples only) Immediately introduce a piece of 118" NyfaFlowT"4 tubing Into tyre <br /> 'EXHAUsr port of the ICABIS Sampler until it stops at the bottom of the sampler interior <br /> 10 (tar RCRA Samples only)Attach the fmo end to a piece of TYGONTr" tubing and place the tubing ' <br /> in the peristaltic pump head <br /> 11 (for RCAA Samples only) Using penstaltic pump, mthdraw samples for Dissolvea oxygen, � <br /> Elactron Ion Potential. Hydronium Ion Concentration, Electrical Conductivity, and Temperature i <br /> into appropriate sampling containers <br /> 12 (for RCRA Samples only) Withdraw appropriate sample for nuclides and metals, and withdraw <br /> the WyiaFlowrm tubing. <br /> 13 Open the sampler cap and quickly remove and class each sample container, using a inverted E <br /> conical positive displacement cap, preserve as necessary, and place on ice for transport to the <br /> laboratory <br /> 14 Annotate Chain-of-Custody and other appropriate documents F <br /> 15 Repeat 1-14 as necessary for the rematrider of the wells on sits <br /> 5 oi$ 324199 4 22 PM <br />