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WINZLER & KELLY, INC. STANDARD OPERATING PROCEDURES FOR SOIL BORING AND MONITORING WELL INSTALLATION AND DEVELOPMENT BLUE STAR PROPERTY 4040 EAST MAIN STREET STOCKTON,CALIFORNIA SECTION 1. MONITORING WELL INSTALLATION 1. Objective To establish accepted procedures for the installation of monitoring wells for sites under investigation or remediation from impacts with chemical contaminants. 2. Background Monitoring wells are used for subsurface investigation and remediation projects. Well-designed monitoring wells provide data on groundwater movement, groundwater quality, seasonal water table fluctuations, rates of natural attenuation, and changes in contaminant concentrations through time. Monitoring wells are installed in accordance with the California Well Standards(Department of Water Resources Bulletin 74-90)and with the appropriate lead agency guidelines. 3. Personnel Utilized and Responsibilities Professional Geologist: A Professional Geologist(PG) is responsible for ensuring that the monitoring wells are properly installed,that the possibility of cross contamination between aquifers has been minimized, and that the well installation will achieve its desired purpose. The PG oversees the project and ensures that field personnel have been trained in the use of this procedure. Project Scientist: The responsible professional in charge of fieldwork must determine the location and depth of each well, and decide on the sampling interval. The project scientist oversees installation of the well,collects samples and prepares them for transport to the laboratory, and records lithologic and other observations. The Project Scientist is responsible for site safety and health, and compliance with this SOP and for submittal of the well completion report to the Department of Water Resources. Staff Technician:A staff technician has 0.5 to 5 years experience logging borings, installing and developing monitoring wells. The staff technician is responsible for complying with these procedures, lithologic logging,collection of samples,and field documentation, and development of wells prior to sampling. The staff technician will call the PG with field observations and contaminant data to obtain approval of final well design. Driller(Subcontractor): An appropriately licensed(C57) drilling contractor must employ an OSHA- certified crew. The Driller is responsible for the safety and conduct of their employees and complying with the project specifications described in the Workplan and contract. All drilling and SOP MW Install&Dev I of 6 August 2011