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T <br /> Mr. James Barton,PG <br /> 24 April 2014 <br /> Page 8 <br /> • During purging, general water quality parameters (pH, specific conductance, turbidity, <br /> and temperature)will be periodically measured and recorded; <br /> • Purging will continue until water quality parameters stabilize; <br /> • Groundwater samples will be collected using the low-flow pump and transferred into <br /> sample containers prepared by the analytical laboratory; and, <br /> • Sample containers will be sealed, labeled, and then placed in a cooler with ice for <br /> transport to the laboratory. <br /> A blind duplicate sample will be collected from one well. One equipment blank will be collected <br /> during each day of groundwater sampling. Trip blanks consisting of organic-free, deionized <br /> water will be prepared by the laboratory and will accompany the sample containers during <br /> transport to, during, and after sampling. The trip blank sample bottles will not be opened. <br /> Groundwater and QA/QC samples will be handled under standard chain of custody procedures <br /> and will be analyzed for VOCs including toluene by EPA Method 8260 and for TPHd by EPA <br /> Method 8015. <br /> Purged water will be contained in drums, labeled, and remain at the facility, pending appropriate <br /> disposal. <br /> Disposition of Waste Materials <br /> There will be some decontamination water generated during field work in addition to the purge <br /> water and soil cuttings. Before leaving the Site, Geosyntec will collect a composite sample of <br /> the purge water and decontamination water and a composite sample of the soil cuttings for waste <br /> classification. Following classification, the waste will be disposed of at an appropriate off--site <br /> facility. <br /> PROPOSED SCHEDULE <br /> We anticipate that that CPT/grab groundwater investigation and installation, development, <br /> surveying, and sampling of monitoring wells can be completed within 30 days of RWQCB <br /> approval. A report documenting the installation of the monitoring wells, summarizing findings <br /> from the investigation, and drawing conclusions and presenting recommendations for future <br /> monitoring will be submitted within 60 days of RWQCB approval. <br /> Offsite Characterization Workplan <br /> engineers I scientists I innovators <br />