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1 <br /> WINZLER& KELLY, CONSULTING ENGINEERS <br /> Site-Specific Monitoring Well Installation Procedures <br /> P l; <br /> California Highway Patrol Facility <br /> 385 West Grant Line Road, Tracy, California <br /> ' April 1, 2004 <br /> i <br /> ' 1. Objective <br /> ' Install a deep monitoring well to define the vertical extent of groundwater contamination <br /> 2 Background <br /> Monitoring well MW-4 was installed in accordance with the ASTM Standards and the <br /> County of Sonoma Department of Health Services, Environmental Health Division <br /> ' guidelines for well installation <br /> 3 Personnel Required and Responsibilities <br /> Slaff Clealagigt, An experienced staff geologist (SG) ensured that the monitoring wells <br /> were properly installed and oversaw the logging of the monitoring wells The SG was <br /> responsible for complying with the stated procedures regarding installation of the wells, <br /> collection of samples, containerization of samples, and documentation <br /> Dnlling Technicians Drilling technicians from Gregg Drilling and Testing Inc , of <br /> ' Martinez, California performed monitoring well installation <br /> 4. Procedures <br /> Winzler& Kelly obtained all required permits prior to drilling the monitoring wells <br /> • A Site-Specific Safety Plan detailing site hazards, site safety, and control was <br /> ' reviewed and signed by all personnel prior to commencing any field work <br /> Underground Services Alert (USA) was notified of the planned work more than 48 <br /> hours ahead of time in order to clear utilities <br /> ' A Photo-Ionization Detector(PID) was used dunng the drilling and sampling <br /> activities to screen for the presence of volatile organic compounds (VOCs) <br /> • A Marl M5-T (Rhino) Limited Access Hollow Stem Auger Drill Rig was used to <br /> ' complete the well drilling and to assist in the well installation <br /> • The well boring was extended to a layer of reduced permeability Soil samples were <br /> ' collected by driving an 18-inch long split-spoon sampler continuously and at 5-foot <br /> intervals. One 6-inch sample tube was retained for field description of the lithology <br /> Soil samples were submitted for analysis as described in the project workplan <br /> ' Soil types were classified and logged using the ASTM Visual Manual Procedure (D <br /> 2488-93) and Munsell Soil Color Charts Using a PID Meter, the soil head space was <br /> field screened within a sealed sample bag <br /> ' 1 of 2 <br />