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17 January 2003 <br /> AGE-NC Project No. 02-0946 <br /> Page 5 of 9 <br /> Manual for Hazardous Waste Site Activities(National Institute for Occupational Safety and Health <br /> Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). Prior to <br /> mobilization, the proposed excavation area will be clearly marked and an underground utility <br /> clearance will be obtained through Underground Service Alert. <br /> 3.2. SOIL BORINGS <br /> Four soil borings will be advanced near the former UST area for collection of soil samples; three of <br /> the soil borings will be utilized for installation of ground water monitoring wells. The proposed soil <br /> boring and monitoring well locations are illustrated on Figure 2. <br /> Procedures for the advancement of pilot borings are described below in Section 4.1. <br /> 3.3. SOIL SAMPLE ANALYSIS <br /> Selected soil samples collected from the pilot borings will be submitted for laboratory analysis. Soil <br /> samples will be selected for laboratory analysis based on field observations, including petroleum <br /> hydrocarbon staining and odor, changes in lithology, suspected petroleum hydrocarbon occurrence <br /> in the capillary fringe zone, and/or organic vapor meter (OVM) readings. Select soil samples will <br /> be analyzed by a State of California Department of Health Services (DHS)-certified laboratory for <br /> the following constituents: <br /> • TPH-g, TPH-d and TPH-mo by EPA Method 8015 Modified; <br /> • BTEX and fuel oxygenating compounds including DIPE, ETBE, MTBE, TAME and TBA <br /> by EPA Method 826013; and <br /> • EDB and 1,2-DCA by EPA Method 8260B. <br /> Laboratory reports for ground water analyses,testing methods, laboratory quality assurance/quality <br /> control (QA/QC) reports, and sample chain of custody documentation will be presented in a report <br /> with the findings and recommendations. <br /> 3.4. MONITORING WELL INSTALLATION AND DEVELOPMENT <br /> Following completion of the pilot soil borings, ground water monitoring wells will be installed in <br /> the three soil borings located outside of the UST area(Figure 2). It is anticipated that the wells will <br /> be screened from approximately 25 feet to 45 feet bsg. Following well installation,the wells will be <br /> Advanced Geo Environmental,Ine. <br />