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15 June 1999 AGE-NC Project No. 99-0606 Page 4 of 6 • TPH-g, TPH-d, and TPH-mo by EPA Method 8015 Modified/5030; • Benzene, toluene, ethylbenzene, and total xylenes (BTEX) and MTBE by EPA Method 8020; and • Chlorinated hydrocarbons CL HC's by EPA Method 8010. Laboratory reports for soil analyses, testing methods, laboratory quality assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be presented in a report with findings and recommendations. 3.3. IN-SITU GROUND WATER SAMPLE COLLECTION AND ANALYSIS During the soil assessment activities,grab ground water samples may be collected and analyzed from the soil probe borings (Figure 2). In-situ ground water sample collection procedures are presented in Section 4.3. Selected groundwater samples will be analyzed by a DHS-certified laboratory for the following constituents: • TPH-g, TPH-d, and TPH-mo by EPA Method 8015 Modified/5030; • BTEX by EPA Method 8020; and • CL HC's by EPA Method 8010. Laboratory reports for ground 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 recommendation 3.4. 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 and applicable recommendations will be included in the report. The report will be in a format acceptable to the PHS-EHD and the CVRWQCB, and will be reviewed and signed by a California Registered Geologist. Advanced GeoEnvironmental,Inc.