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Geosyn tec� <br /> consultants <br /> Grab groundwater samples will be collected from the sandy zone typically encountered <br /> at 30 to 40 ft bgs by either hydropunch or by temporary well. Groundwater samples <br /> will be collected in 40-mL volatile organics analysis vials (VOAs) and analyzed by the <br /> mobile analytical laboratory for VOCs�by EPA Method 8260. Step-out.borings will be <br /> completed as needed to delineate the lateral extent of dissolved toluene. <br /> 5.4 Quality Assurance/Quality Control <br /> .During this.investigation, duplicate groundwater'samples will be collected at a rate of <br /> 10% and submitted blindly to the mobile analytical lab for analysis of VOCs by EPA <br /> Method 8260. <br /> 5.5 Site Restoration and Investigation-Derived Waste. <br /> i <br /> Soil borings will be grouted with neat,cement placed by the tremmie method from the <br /> bottom up. All grouting will be conducted under the supervision of the County. <br /> Ground surfaces will be completed to match surrounding surfaces (e.g., dirt, asphalt, <br /> concrete). <br /> Soil cuttings, decontamination water, and purgewater generated during investigation <br /> activities will be labeled and stored at the Site in Department of Transportation- <br /> approved containers pending characterization and disposal at an appropriate off Site <br /> facility. <br /> Monitoring Well Installation Report 9 21 January 2013 <br /> I <br />