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13 October 1998 <br /> AGE-NC Project No. 98-0504 <br /> Page 4of5 <br /> 3.3. SOIL SAMPLE COLLECTION AND ANALYSIS <br /> A total of up 10 soil samples will be collected from the excavation will be submitted for laboratory <br /> analysis. Following State of California Regional Water Quality Board, Tri-Regional Board <br /> recommendations, soil samples will be collected from the base and each side wall of the "new" <br /> excavation at a minimum interval of every 20 linear feet. Soil samples will be collected from the <br /> base of the excavation at a minimum of one sample for every 400 square feet of excavation area. <br /> Field procedures for collection of soil samples are presented in Section 4.2. <br /> Selected soil samples will be analyzed by a State of California Department of Health Services <br /> (DHS)-certified laboratory for the following constituents: <br /> • TPH-g by EPA Method 8015 Modified/5030; <br /> • BTEX by EPA Method 8020; and <br /> • Fuel oxygenates including methyl tert-butyl ether(MTBE),tertiary-butyl alcohol (TBA), di- <br /> isopropyl ether (DIPS), ethyl tertiary-butyl ether (ETBE) and tertiary-amyl methyl ether <br /> (TAME) by EPA Method. 8260. <br /> Laboratory reports for soil analyses, testing methods, laboratory quality assurance/quality control <br /> (QA/QC) reports, and sample chain of custody documentation will be presented in a report with <br /> findings and recommendations. <br /> 3.4. REPORT PREPARATION <br /> Upon completion of field work and receipt of final laboratory analysis, a report will be prepared <br /> presenting the findings of the soil removal activities. The report will include a description of the <br /> work performed and the results of the sampling and analysis. Conclusions and applicable <br /> recommendations will be included in the report. The report will be in a format acceptable to the <br /> PHS-EHD and CVRWQCB, and will be reviewed and signed by a California Registered Geologist. <br /> 4.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist. Procedures for soil excavation, soil sampling, and equipment decontamination <br /> are outlined below. <br /> Advanced GeoEnvironmental,Inc. <br />