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f Wa t erwork r Groundwater Sam lin__q protocol Groundwater monitoring wells will be developed within 49 hours of completion. Approximately 10 times the volume of water in casing will be withdrawn, if possible. If the aquifer is slowthe a., recharge, development will continue until recharge is too slow to practically continue. All withdrawn groundwater will be stored on-site in covered 55 granted by the appropriate gallon waste drums, unless permission is Pumped teg regulatory agencies to discharQe uhe P groundwater to the ground surface. Prior to arriving at the site, all sampling equipment washed with laboratory grade detergent, and rinedtwice with tae water and once with deionixed water, The sample washing procedure will be carried ou4 on-sitr� before samplzng ache monitoring wells in cases where more than one monitoring well is to be sampled. Immediately prior to sampling, the depth to water (DTW) level in the well will be recorded, The thickness of product on top of the groundwater, if present, will be measured using an interface probe. The procedure for conducting these monitorings T presented in the Groundwater MOnitcring protocol attachment, are Approximately four times the volume of water in the well, casing will be withdrawn by pumpin If g or hand bailing immediate) ior to sampling. the aquifer is slow to recharge, a smallerPram amount Of groundwater will be withdrawn in order to leave a volume of water in the well to samDle. sufficient The groundwater sample will be collected by lowering a Teflon sampler into the monitoring well and immediately transferring the sample into a 40 ml volatile organic analysis The sample container will be filled completely soDthatconoa=head space remains in the container. Duplicate samples collected from each well sampled. will be Immediately following sample collection, the samples labeled and stored in an ice chest containing "blue icewill be The labels will contain the following infaxmation; date, time, project ID, samPle ID, name of sampler and type of analysis. All samples will be transported under chain of custody protocol to a state certified laboratory. To reduce the der of lin of re cross-contamilation, the wells will be sampled in. order of increasing contamination based on previous laboratory analysis, if available, or b visual/olracto a field___ addition,__ , of- visual/olfactory---indications- -of contamination. In addition, - -- - -_ - -- =�.- - -- latex gloves worn by the sampler and the nylon cord used to lower the teflon sampler will be replaced between each well sampling.