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09 April 2003 AGE-NC Project No. 98-0450 Page 3 of 4 The water samples will be analyzed by a State of California Department of Health Services (DHS)- certified laboratory for the following constituents: • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Method 8015 Modified, • Volatile aromatic hydrocarbons: benzene, toluene, ethyl benzene and total xylene (BTEX) in accordance with EPA methods 8020 and • Fuel additives:di-isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETBE),methyl tertiary- butyl ether(MTBE),tertiary-amyl methyl ether(TAME),tertiary butanol(TBA),methanol, ethanol, ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 8260 Modified. 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. 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 ofthe sampling and analysis.Conclusions,applicable recommendations,maps and cross-sections will be included in the report. The report will be in a format acceptable to the EHD and the CVRWQCB, and will be reviewed and signed by a California Registered Geologist. If hydrocarbon-impacted ground water is encountered at the site, a recommendation for the installation of additional ground water well may be included in the report. 4.0. FIELD PROCEDURES All field procedures will be overseen by an AGE geologist or representative under the supervision of a California Registered Geologist. Procedures for the advancement of borings, soil sampling, ground water sampling, equipment decontamination and sample shipment are outlined below. Advanced GeoEnvironmental,Inc.