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05 October 2022 AdvancedGeo <br /> Project No. 95-0184 An Employee-Owned Company <br /> Page 2of3 <br /> sampling in consultation with an AGI Professional Geologist. All groundwater samples will <br /> be analyzed for: <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and <br /> TPH-d) by EPA method 8015B. <br /> • Benzene, toluene, ethylbenzene, and total xylenes (BTEX) by EPA method 8260B. <br /> • Fuel oxygenates tertiary amyl methyl ether (TAME), ethyl tertiary butyl ether <br /> (ETBE), diisopropyl ether (DIPE), tertiary butyl ether (TBA) and methyl tertiary <br /> butyl ether (MTBE) by EPA method 8260B. <br /> • Lead scavengers 1,2-dichloroethane (1,2-DCA) and ethylene dibromide (EDB) by <br /> EPA method 8260B. <br /> Laboratory reports for groundwater analysis, testing methods and laboratory quality <br /> assurance/quality control (QA/QC), and sample chain of custody documentation will be <br /> presented in a report with findings and recommendations. <br /> 2.3. 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 description <br /> of the work performed and results of the sampling and analysis. Conclusions, applicable <br /> recommendations, maps, and cross-sections will be included in the report. The report will <br /> be in a format acceptable to CVRWQCB and will be reviewed and signed by a California <br /> Professional Geologist. <br /> 3.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGI representative under the supervision of a <br /> California Professional Geologist. Procedures for the advancement of the soil borings, <br /> groundwater sampling, equipment decontamination and sample shipment are outlined <br /> below. <br /> 3.1. SOIL BORING ADVANCEMENT AND SOIL SAMPLE COLLECTION <br /> Utilizing a track-mounted direct push drilling rig equipped with 1.5- to 2-inch diameter <br /> hollow-probing rods, a total of four (4) soil borings will be advanced to a depth of 40 feet <br /> bsg. Proposed boring locations are illustrated on Figure 2. <br /> Soil samples will be collected from all borings continuously from 5 to 40 feet bsg using a <br /> dual tube GeoProbe sampling assembly loaded with five-foot acetate liners. Upon sample <br /> retrieval, a selected portion of the liner will be cut, and the ends covered with Teflon <br /> sheets, capped, and sealed with tape. <br />