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h <br /> 15 November 2005 <br /> • AGE-NC Protect No 95-0130 <br /> Page 8 of 10 <br /> While the primary contaminant of concern for this work plan is MTBE, ground water samples will <br /> be analyzed by a California Department of Health Services (DHS)-certified laboratory for all of the <br /> following <br /> • TPH-g and TPH-d in accordance with EPA Method 8015 Modified, <br /> • BTEX constituents in accordance with EPA Method 8260B, and <br /> v' rI <br /> • Methanol, ethanol, ethylene dibromide (EDB), 1,2-DCA, TBA, di-isopropyl ether (DIPE), <br /> ethyl tert butyl ether (ETBE), tert amyl methyl ether (TAME) and MTBE by EPA Method <br /> 8260B W///tuuo/ ? ,add <br /> Laboratory reports for soil and ground water analysis, testing methods, laboratory quality <br /> assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be <br /> presented in a report of findings and recommendations <br /> 3 3 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 investigation The report will include a description of the work <br /> performed and results of the sampling and analysis Conclusions,applicable recommendations,maps <br /> and cross-sections will be included in the report Findings will also be incorporated into the <br /> development of a Site Conceptual Model (SCM) These reports will be in formats acceptable to the <br /> EHD and CVRWQCB, and will be reviewed and signed by a California Professional Geologist <br /> 4.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Professional Geologist Procedures for the advancement of paired CPT borings, probe borings, <br /> ground water sampling, equipment decontamination and sample shipment are outlined below <br /> 41 CPT ADVANCEMENT <br /> Three CPT soil borings will be advanced vertically to total depths of approximately 125 feet bsg <br /> utilizing a 25-ton truck-mounted CPT drill rig equipped with I%-inch diameter hollow-stem rods <br /> A hydraulic ram will be utilized to advance a cone penetrometer tip to total depth of each CPT <br /> boring Soil parameters such as cone penetrometer tip resistance, sleeve friction,friction ratio(ratio <br /> between sleeve friction and tip resistance) and pore water pressure will be continuously measured <br /> Advanced GeoEnvzronmental,Inc <br />