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WINZLER & KELLY CONSULTING ENGINEERS <br /> ' Site-Specific Groundwater Sampling Procedures <br /> California Highway Patrol Facility <br /> 385 West Grant Line Road, Tracy, California <br /> April 7, 2004 <br /> ' 1. Objective <br /> Collect representative water level data and groundwater samples <br /> ' 2. Personnel RequiredP and Responsibilities <br /> ' W,nzler&c Kelly Technician A qualified Winzler & Kelly technician performed the <br /> quarterly monitoring and sampling activities in accordance with the procedures outlined <br /> ' below <br /> 3 Procedures <br /> ' 3a. Decontamination Procedures <br /> N . The wash and rinse buckets, the ES-60 purger pump, and the water level meter were <br /> decontaminated using alconox soap and potable water <br /> • The pump and water level meter were decontaminated following use in each well <br /> ' Nitrile gloves were worn by the sampler at all times and changed after handling <br /> equipment and instruments <br /> ' 3b. Calibration Procedures <br /> The Ultrameter was calibrated for conductivity and pH Temperature calibration is not <br /> ' necessary in the Ultrameter <br /> Conductivity was calibrated using KCI-7000 standard solution within its expiration <br /> date <br /> The calibration for pH included "zeroing"the Ultrameter with a pH 7 buffer solution <br /> followed by adjusting the gain with acid and base buffers (4 01 and 10 00) <br /> ' 3c. Groundwater Elevations <br /> ' . All monitoring wells were opened and expandable caps removed <br /> • Each well was allowed to equilibrate to atmospheric pressure for a minimum of 20 <br /> minutes <br /> ' • An electronic water level meter was used to measure the depth-to-groundwater in <br /> each monitoring well <br /> • • The depth, time, and visual observations regarding well access, condition, security, <br /> etc , were recorded on a Water Level Data Sheet <br /> 1 of 3 <br />