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ARCADIS Ms. Kathy Amaru <br /> May 26, 2011 <br /> Monitoring Well Survey <br /> The top of casing and ground surface elevation, as well as the northing and easting <br /> for the new monitoring well, will be surveyed by a California-licensed land surveyor <br /> after completion of the monitoring well installation. <br /> Decontamination <br /> All down-hole drilling and sampling equipment will be steam-cleaned following the <br /> completion of each sampling location. Decontamination of non-dedicated or non- <br /> disposable field equipment will be conducted using an Alconox®solution and <br /> deionized water rinse to prevent potential cross-contamination. <br /> Investigation-Derived Waste <br /> Investigation derived waste (IDW)generated during investigation activities may <br /> include soil cuttings, decontamination fluids, purgewater, personal protective <br /> equipment(PPE), and other disposable sampling materials. Soil cuttings derived <br /> from drilling as well as wastewater from decontamination procedures and purgewater <br /> from the collection of groundwater samples will be placed in 55-gallon drums. PPE, <br /> such as nitrile gloves, and disposable supplies or other household-type waste, such <br /> as paper and plastic, will be treated as municipal waste. One composite soil sample <br /> and one composite water sample will be collected from the IDW drums and analyzed <br /> for site-related constituents of concern to characterize the waste for disposal. <br /> Pending characterization, IDW will be stored onsite in a secure and controlled area. <br /> Containerized waste will be disposed of in accordance with waste hauler, waste <br /> handling facility and state and federal requirements. <br /> Quality Assurance and Quality Control Procedures <br /> To verify that the analytical data collected during the investigation is valid and <br /> useable, the data will be evaluated using a standard quality assurance and quality <br /> control (QA/QC) program. <br /> Field QA/QC procedures will include calibration of sampling equipment(including <br /> PIDs and water quality parameter meters), the use of standard chain of custody <br /> procedures for sample control, and written and visual documentation of field activities <br /> in daily field logs and by photograph. One field groundwater duplicate and one <br /> Page: <br /> McD Island Well Inslall Workplan FlnaI.DOC 6/8 <br />