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�+.� � Y' i 5 --- Wa t e r Work rza"vndwater Sampling Protocol Groundwater monitoring wells will be developed within 48 hours of completion. Approximatel,, "10 ime casing will be withdrawn I� the e. volume of water in the recharge, development will=continueluntilfrechargeaquifer too slow to q practically continue. All withdrawn groundwater will be stored on--site in covered 55 gallon waste drums, unless permission is granted by the appropriate regulatory agencies to lischarge the Pumped groundwater to the ground surface. Prior to arriving at the site, all sampling equipment will be washed with laboratory grade detergent, and rinsed twice with tap water and once with deionized water. The Procedure will be carried out on-site before sampi samplingwaother shing - monitoring wells in cases where more than one monitoring well is to be sampled. Immediately prior to sampling, the depth to water {DTFJy Ievei 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 are V Presented in the Groundwater Monitoring Protocol attachment. Approximately four times the volume of water in the well casing - will be withdrawn by pumping or hand balling immediately prior to L(� sampling. If the aquifer is slow to recharge, a smaller amount Of groundwater will be withdrawn in order to leave a sufficient • volume of water in the well to sample. 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 {VOA) container. The sample container will be filled completely so that no head space remains in the container. Duplicate samples collected from each well sampled. will be Immediately following sample collection, the samples will be labeled and stored in an ice chest containing "blue ice". The labels wi]_1 contain the following information: date, time, h.� project ID, sample ID, name of sampler and t samples will be transported under chain of custody analysis. All state certified laboratory. Y Protocol to a To_reduce-the potential--of cross-contamination, the wails will be sampled in order of increasing contamination based on laboratory analysis, if available, or b Previous visual/alfactary indications of contamination. In Inviaddition# latex gloves worn by the sampler and the nylon cord used to lower .a the teflon sampler will be replaced between each well sampling.