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Soil cuttings generated during drilling operations will be placed in 55-gallon steel drums. <br /> L Following completion of each soil boring, a single composite soil sample will be collected from <br /> the drums and the drums closed. Following analysis of the sample, a commercial waste hauler <br /> i will be employed to appropriately dispose of the cuttings. <br /> Well development purge water,groundwater sampling purge water, and decontamination rinsate <br /> will be temporarily stored on site in a 1,000-gallon tank pending receipt of analytical results <br /> #� followed by appropriate disposal by a commercial waste hauler. URS will also pursue permitting <br /> with the City of Stockton Department of Public Works to allow disposal of purge and <br /> decontamination water to the on site sanitary sewer inlet. <br /> 5.0 SAMPLING METHODS AND PROCEDURES <br /> i4. <br /> Groundwater samples will be collected from, and water levels sounded in,all eight Site wells on a <br /> quarterly basis. A composite soil sample will be collected to assess investigation derived wastes <br /> (IDW). Soil and groundwater samples will be submitted to a California Department of Health <br /> Services certified analytical laboratory for analysis of TPH/D by EPA Method 8015M and VOCs <br /> be EPA Method 8260B. One field duplicate and one equipment rinsate blank will be collected <br /> and analyzed during each groundwater sampling round. The rinsate blank will be collected by <br /> pouring distilled water over the exterior of the submersible purge pump following <br /> decontamination. A trip blank will be included in the sample shipment for analysis by EPA <br /> Method 8260B. Soil and groundwater analytes,methods,containers, and preservatives are listed <br /> in Table 1. <br /> 4 <br /> 5.1 Soil Sampling Procedures <br /> A composite grab soil sample will be collected from the drill cuttings following the installation of <br /> the groundwater monitoring well.The sample will be analyzed for TPH/D to assess disposal <br /> L alternatives. <br /> 5.2 Groundwater Sampling Procedures <br /> L Groundwater samples will be collected on a quarterly schedule for four rounds. Groundwater <br /> samples will be collected in accordance with pertinent applicable sampling protocols, as <br /> discussed below. <br /> 5.2.1 Static Water Level Measurement <br /> Prior to sampling,the static water level will be measured at all wells using an electric water level <br /> indicator. Well seals will be used and water levels allowed to stabilize prior to measurement. <br /> Measurements will be made,recorded, and repeated until at least two consecutive depth readings <br /> are within 0.01 feet. Water level data will be recorded to the nearest 0.01 foot from a reference <br /> point marked on the top of the PVC casing. Before and after each use,the measurement device <br /> will be thoroughly rinsed with deionized water. <br /> ' 5.2.2 Well Purging <br /> LPrior to sample collection, the monitoring wells will be purged with a portable submersible pump <br /> or a disposable bailer. Purging of the well will be performed in order to obtain samples <br /> representative of groundwater in the formation.Monitoring wells will be purged until a minimum <br /> L of three casing volumes of water have been removed and field measurements of pH, temperature, <br /> and conductivity have stabilized. <br /> z <br /> lir <br /> 5 <br /> L <br />