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May 2011 P8980010tes,I•®. Project No. 1001-0343 containers provided by the analytical laboratory and sealed, labeled, and preserved on ice in the field. Chain of custody forms will be used to document sample management procedures. All generated soil cuttings and rinse water will be stored in 55-gallon DOT approved drums pending laboratory analytical results. Each drill hole will be abandoned using a neat cement grout introduced through a tremmie pipe. The PVC casing will be filled with grout, cut below ground surface, and capped. The drill hole abandonment procedure will be performed with the concurrence and under the direction of the SJCEHD inspector. 3.5 LABORATORY ANALYTICAL PROGRAM All collected soil and groundwater samples will be delivered under chain-of-custody procedures to a State of California-certified laboratory for potential chemical analyses. The actual soil samples selected for chemical analyses will be based primarily on field observations (visual, olfactory). The laboratory analytical program includes analyses of selected soil and groundwater samples for the presence of the following constituents: • TPH identified as diesel by U.S. EPA method 8015M; • BTEX by U.S. EPA Method 8260; and • MTBE by U.S. EPA Method 8260. 4.0 REPORT PREPARATION Following receipt and review of the analytical data, Padre will prepare a report documenting the limited soil and groundwater assessment program. The report will document the soil and groundwater assessment methodology; site conditions encountered; field procedures utilized; and will summarize the analytical results. The report will also identify, to the fullest extent possible, the approximate volume of impacted soil, if encountered. The report will contain all appropriate figures, and tabular data, and contain our conclusions and recommendations, as appropriate. The report will be signed and certified by a State of California-licensed Professional Geologist. 5.0 SCHEDULE Padre is proposing to perform the limited soil and groundwater assessment activities after the existing 8,000-gallon diesel fuel UST has been partially closed in-place. The scope of service detailed herein will require approximately four to six weeks to complete. Permit acquisition will require one to two weeks. The field assessment activities will require one to two weeks, and chemical analyses of the soil and groundwater samples collected will be available within one to two weeks. The report will be prepared within two weeks of completing the fieldwork and receiving the results of the laboratory analyses. 10.0U3.TWP HSP assessment rev1s d - - - 5 -