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1 <br /> 22 January 2020 AdvancedG!ta <br /> At,Employee mpany <br /> AGI Project No. 20-4995 <br /> Page 2 of 3 <br /> be updated in accordance with Occupational Safety and Health Guidance Manual for <br /> Hazardous Waste Site Activities (National Institute for Occupational Safety and Health <br /> Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). <br /> Prior to mobilization, each proposed boring location will be clearly marked, and a utility <br /> clearance obtained through Underground Service Alert. <br /> 3.2. SOIL PROBE BORINGS AND SAMPLING <br /> A total of four (4) soil borings will be advanced onsite in the areas illustrated in Figure 2. <br /> All borings will be advanced utilizing a van-mounted direct push drilling rig. Soil borings <br /> will be advanced in the suspected UST and dispenser island areas to a total depth of <br /> 20 feet below surface grade (bsg). Soil samples will be collected from each boring at <br /> five-foot intervals between 5 and 20 feet bsg. <br /> Soil samples will be analyzed by a California Environmental Lab Accreditation Program <br /> (CELAP)-certified lab for the following: <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and <br /> TPH-d) in accordance EPA Method 8015M. <br /> • Volatile organic compounds, including naphthalene, in accordance with EPA <br /> Method 8260B. <br /> Laboratory reports for soil sample and water analyses, testing methods, laboratory <br /> quality assurance/quality control (QA/QC) reports, and sample chain-of-custody <br /> documentation will be presented in a report with the findings and recommendations. <br /> 3.3. REPORT PREPARATION <br /> Upon completion of field work and receipt of final laboratory analysis, a report will be <br /> prepared presenting the findings of the investigation. The report will include a <br /> description of the work performed and results of the sampling and analysis. <br /> Conclusions, applicable recommendations and maps will be included in the report. The <br /> report will be reviewed and signed by a California Professional Geologist. <br /> 4.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of <br /> a California Professional Geologist. Procedures for the advancement of the soil borings <br /> and soil sampling are outlined below. <br />