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�1 <br /> WaterWork <br /> Groundwater Sampling Protocol. <br /> Groundwater monitoring wells will be developed within 48 hours of <br /> completion. Approximately 10 times the volume of water in the <br /> casing will be withdrawn, if possible. If the aquifer is slow to <br /> recharge, development will continue until recharge is too slow to <br /> f: practically continue. All withdrawn groundwater will be stored <br /> on-site in coveted 55 gallon waste drums, unless permission is <br /> granted by the appropriate regulatory agencies to discharge the <br /> pumped groundwater to the ground surface. <br /> S-^ <br /> Prior to arriving at the site, all sampling equipment will be <br /> washed with laboratory grade detergent, and rinsed twice with tap <br /> water and once with defonized water. The sample washing <br /> Procedure will be carried out on-site before sampling other <br /> monitoring wells in cases where more than one monitoring well is <br /> y to be sampled, <br /> G.� <br /> Immediately prior to sampling, the depth to water (DTW) level inthe well will be recorded. The thickness of p <br /> $ product on to of ; <br /> the groundwater, if present, will be measured using an interface <br /> probe. The procedure for conducting these monitorings are <br /> " presented in the Groundwater Monitoring Protocol attachment. <br /> Approximately four times the volume of water in the well casing <br /> will be withdrawn by pumping or hand bailing immediately prior to <br /> r sampling: If the aquifer is slow to recharge, a smaller amount <br /> of groundwater will be withdrawn in order to leave a sufficient <br /> volume of water in the well to sample. <br /> tj The groundwater sample will be collected by lowering a Teflon <br /> e= sampler into the monitoring well and immediately transferring the 3 <br /> sample into a 40 ml volatile organic analysis (VOA) container. . <br /> �4 The sample container will be filled completely so that no head - � <br /> space remains in the container. Duplicate samples will be ! <br /> collected from each well sampled. f <br /> Immediately following sample collection, the samples will be <br /> a labeled and stared in an ice chest containing "blue ice". The <br /> 'r, labels will contain the following information: date, time, <br /> tits protect ID, sample ID, name of sampler and type of analysis. All <br /> �} samples will be transported under chain of custody protocal to a <br /> state certified laboratory. . <br /> K411 <br /> - To-reduce-the <br /> P 0 t e n t I a I o f-crosis=contamfnation, the wells will be T <br /> sampled in order of increasing. contamination based on .previous <br /> + Lj laboratory analysis, if. available, or by : field evidence of <br /> " �risuallolfactory indications of contamination. In addition, <br /> h rra.J latex gloves worn by the sampler and the nylon cord: used to. lower <br /> Y j the teflon sampler will be replaced between each well sampling. <br /> LS <br /> f ! <br /> ., <br /> T u, <br /> y� 1 <br />�a f <br />