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n !! <br /> CLEARWATER <br /> G- R k) LJI <br /> (�'; Errorrnnnte ta! Services i <br /> guidelines and Clearwater's Field Protocols . Soil samples will be screened for the presence of petroleum hydrocarbon <br /> vapors with a Thermo 580E photo-ionizing OVM detector.!- <br /> Sail samples retained for laboratory analysis will be capped witli teflon lined plastic caps, labeled,documented on a chain- <br /> of-custody form, and placed on ice in a cooler for transportto the project laboratory. <br /> Upon completion of all drilling and sampling activities;'�the borings will be backfilled with -rout or other approved <br /> methods, in accordance with local and state regulations. <br /> Sampling equipment and drill-rods will be cleaned between use to prevent cross-contamination. The equipment will be <br /> cleaned with an Aiconox wash followed by a double rinse in clean tap water. Sampler and drill-rod rinseate I will be stored <br /> on-site in a labeled 55-ballon drum.pending disposal. <br /> iE <br /> 3.3 Analytical Methods <br /> It is assumed that a total of nine soil sample will be retained for laboratory analysis. This samples will include those <br /> collected from the 10 and 15 foot depth interval from all borings,and also the 5-foot sample from boring C13-2, located in <br /> the area of the former dispenser island. These samples will be analyzed for concentrations of TPHg. BTEX, and MTBE <br /> i <br /> by EPA Methods 8015 (modified) and 8020. All sample analyses will be performed by Entech Analytical Labs, Inc.,a <br /> DHS-certified laboratory located in Sunnyvale,CA. The proposed analytical schedule is summarized below:. <br /> I �l <br /> Boring Depth (feet) Analvte <br /> CB-1 10. 15 TPHg,BTEX.-MTBE <br /> CB-2 5, 10, 15 TPHg,BTEX,MTBE I <br /> CB-3 10, 15 TPHg,BTEX.MTBE <br /> CB-4 10, 15 TPHg,BTEX,MTBE <br /> 1 <br /> TPHg,BTEX,MTBE=by EPA Method 8015/8020(modified) <br /> i <br /> 3.4 Reporting <br /> t <br /> Following completion of confirmation soil boring activities,Clearwater will prepare a-report describing the results. The <br /> 'k <br /> report will summarize field analytical methods and results.I The report will provide conclusions and recommendations,as <br /> warranted. The report will also include supporting tables and figures. The report will be reviewed and signed by a <br /> California Registered Geologist at Clearwater. <br /> tr <br /> 1}� <br /> D-107 4Q99 GW&WP Confirmation Borings S [november 15, 1999 <br />