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v � <br /> ago <br /> Wont Plan-Soil and Groundwater Investigation <br /> Gateway Project,City of Stockton <br /> March 10,2000 <br /> Ir Page-z- <br /> Mrr <br /> 3. FIELD AND ANALYTICAL METHODS <br /> 3.1 SITE PREPARATION <br /> Condor will complete a drilling permit application and obtain the required permit from the County of San <br /> L. <br /> Joaquin. Condor has assumed that the site has been cleared of underground utilities due to recent <br /> ' construction activities at the site. It is also assumed that an excavation permit will not be required, and <br /> Lo that a maximum of two borings will be advanced in the street. Condor will schedule and coordinate all <br /> field activities through Siegfried. The proposed street boring locations have been marked with white <br /> LNpaintand the Underground Service Alert <br /> p gr (USA) will be notified at least 72 hours in advance of the <br /> fieldwork to locate and identify underground utilities in and near each site work area. Prior to fieldwork, <br /> LW Condor will also submit a site exploration map to the City of Stockton and to San Joaquin County for <br /> I approval of the boring locations. <br /> LN <br /> 3.2 GEOPROBE BORINGS <br /> Lo Condor's understanding of the site conditions indicate that the field work will include the installation of <br /> k soil borings utilizing direct push technology(geoprobe) at various locations at the site. The locations will <br /> Lo be based on the location(s) of the former USTs and suspected locations of contamination. The soil <br /> sampling for the project is expected to be completed in one day of fieldwork. All fieldwork will be <br /> coordinated with Siegfried, and will utilize all available information from previous reports by Twining <br /> Laboratories, and the demolition contractor,Evans Brothers Inc. <br /> Lo <br /> Prior to commencement of fieldwork, a tailgate safety meeting will be held and a site-specific Health and <br /> La Safety Plan will be discussed with, and presented to, all field personnel for their signatures. A minimum <br /> of four to six soil borings will be installed to a maximum depth of 30 feet below ground surface (bgs). It <br /> * is assumed that that groundwater samples will be collected from the borings if encountered before 30 <br /> t. <br /> feet. It is possible that the borings will be terminated at refusal before groundwater is encountered. If <br /> groundwater is encountered, groundwater samples will be collected. Soil samples will generally be <br /> LO <br /> collected at five-foot intervals. Two soil samples from each of the four borings will be selected for <br /> + laboratory analysis based on field observations and field screening with a photoionization detector <br /> tar <br /> LJ CONDOR <br /> L <br />