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WINZLER & KELLY, INC. <br /> STANDARD OPERATING PROCEDURES FOR SOIL BORING AND <br /> MONITORING WELL INSTALLATION AND DEVELOPMENT <br /> SIEBOLD CONSTRUCTION PROPERTY <br /> 820 S.AMERICAN STREET <br /> STOCKTON,CALIFORNIA <br /> SECTION I. MONITORING WELL INSTALLATION <br /> 1. Objective <br /> To establish accepted procedures for the installation of monitoring wells for sites under investigation <br /> or remediation from impacts with chemical contaminants. <br /> 2. Background <br /> Monitoring wells are used for subsurface investigation and remediation projects.Well-designed <br /> monitoring wells provide data on groundwater movement, groundwater quality, seasonal water table <br /> fluctuations,rates of natural attenuation, and changes in contaminant concentrations through time. <br /> Monitoring wells are installed in accordance with the California Well Standards(Department of <br /> Water Resources Bulletin 74-90)and with the appropriate lead agency guidelines. <br /> 3. Personnel Utilized and Responsibilities <br /> Professional Geologist: A Professional Geologist(PG) is responsible for ensuring that the monitoring <br /> wells are properly installed,that the possibility of cross contamination between aquifers has been <br /> minimized,and that the well installation will achieve its desired purpose. The PG oversees the <br /> project and ensures that field personnel have been trained in the use of this procedure. <br /> Project Scientist: The responsible professional in charge of fieldwork must determine the location <br /> and depth of each well, and decide on the sampling interval. The project scientist oversees <br /> installation of the well,collects samples and prepares them for transport to the laboratory, and <br /> records lithologic and other observations.The Project Scientist is responsible for site safety and <br /> health,and compliance with this SOP and for submittal of the well completion report to the <br /> Department of Water Resources. <br /> Staff Technician: A staff technician has 0.5 to 5 years experience logging borings, installing and <br /> developing monitoring wells.The staff technician is responsible for complying with these <br /> procedures, lithologic logging, collection of samples, and field documentation, and development of <br /> wells prior to sampling.The staff technician will call the PG with field observations and contaminant <br /> data to obtain approval of final well design. <br /> Driller(Subcontractor): An appropriately licensed (C57)drilling contractor must employ an OSHA- <br /> certified crew.The Driller is responsible for the safety and conduct of their employees and <br /> complying with the project specifications described in the Workplan and contract. All drilling and <br /> SOP MW Install&Dev <br /> 1 Of 6 August 2011 <br />