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i 02 July 2019 AdvancedGeo AGE Project No. 19-4793 Envi ron menta I Page 2 of 3 `� NI 2.1. PRE-FIELD WORK ACTIVITIES Applicable site assessment permits will be obtained from the San Joaquin County Environmental Health Department (SJCEHD). In addition, a health and safety plan will be updated in accordance with Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities (National Institute for Occupational Safety and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). Prior to mobilization, each proposed boring location will be clearly marked, and a utility clearance obtained through Underground Service Alert. 2.2. SOIL PROBE BORINGS AND SAMPLING For the proposed investigation, a total of six (6) borings will be advanced to ten feet below surface grade (bsg) near the three floor drains, the drain line and in the rear of the property. Two additional borings will be advanced to twenty feet bsg in the septic tank areas at the north edge of the property (Figure 2). All borings will be advanced utilizing a van-mounted direct push drilling rig. Soil samples will be collected at five-foot intervals beginning at 5 bsg and ending at ten and twenty feet bsg in proposed borings. Soil samples will be analyzed by a California Environmental Lab Accreditation Program (CELAP)-certified lab for the following: • Total petroleum hydrocarbons quantified as gasoline, diesel and motor oil (TPH-g, TPH-d and TPH-mo) in accordance EPA method 8015M. • Volatile organic compounds, including naphthalene, in accordance with EPA method 8260B. Laboratory reports for soil sample and water analyses, testing methods, laboratory quality assurance/quality control (QA/QC) reports, and sample chain-of-custody documentation will be presented in a report with the findings and recommendations. 2.3. REPORT PREPARATION Upon completion of field work and receipt of final laboratory analysis, a report will be prepared presenting the findings of the investigation. The report will include a description of the work performed and results of the sampling and analysis. Conclusions, applicable recommendations and maps will be included in the report. The report will be reviewed and signed by a California Professional Geologist.