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kff] KL EINEELDER <br />A survey of the three monitoring wells was conducted on June 5, 2002. The tops of the <br />monitoring well casings were surveyed by Morrow Surveying of Sacramento, California. The <br />monitoring well coordinates were surveyed relative to California State Plane Zone 3 from GPS <br />observations using University of California Bay Area Deformation CORS Station observation <br />files (reference epoch 2000.35). The coordinate datum is NAD 83 (1986). The monitoring well <br />tops of casing (TOC) elevations are listed in Table 1. <br />TABLE 1 <br />MONITORING WELL ELEVATIONS <br />Location <br />Surve • Date <br />TOC Elevation <br />MW -1 <br />6/5/02 <br />40.97 <br />MW -2 <br />6/5/02 <br />40.71 <br />MW -3 <br />6/5/02 <br />40.35 <br />TOC = Top of Well Casing <br />4.3 MONITORING WELL DEVELOPMENT <br />The three monitoring wells were developed on May 23, 2002 to remove sediment -laden water and <br />to increase the hydraulic radius of the well. Development was performed using a development <br />pump and as described in Appendix B, Sections B-3.2 through B-3.3. A copy of the well <br />development logs are located in Appendix D. <br />4.4 INITIAL SOIL AND GROUNDWATER SAMPLING AND ANALYSIS <br />4.4.1 Soil Sampling and Analysis <br />Six (6) soil samples were collected from the soil borings drilled for the installation of the <br />monitoring wells. Two (2) soil samples were collected from each soil boring. <br />Soil samples were collected approximately every 5 feet for field screening and logging. Samples <br />are collected by advancing the boring to a point immediately above the desired sampling depth <br />and then driving a 2 -inch diameter Modified California Split -Spoon Sampler, lined with three 6 - <br />inch long stainless steel tubes into the undisturbed soil. The sampler was then removed from the <br />bottom of the boring. The ends of the bottom (third) tube were covered with Teflon and sealed <br />with tight fitting plastic caps. <br />Each sample was individually labeled. The label included Kleinfelder's name, job number, the <br />date and time the sample was collected, the employee number of the individual who performed <br />the sampling, and a unique five -digit sample identification number. <br />20-3978-03.CHEV / ST02RI I I Page 8 of 18 <br />Copyright 2002, Kleinfelder, Inc. July 1, 2002 <br />