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�e Clayton <br /> z f. oup sift"c i <br /> Mr. Mike Infurna Page 3 <br /> San Joaquin County Clayton Project No. 70-05319 <br /> August 2, 2004 <br /> The brass tubes will be sealed using TeflonTM sheets and plastic end caps. The filled <br /> tubes will then be labeled and placed into a chilled cooler. <br /> During the field activities, Clayton will document the sample locations and observations <br /> to assist with future recommendations and identifying locations where additional soil <br /> may need to be excavated. A photo-ionization device(PID) or organic vapor monitor <br /> (OVM)will be used in the field to identify potential soil hot spots, if applicable. Clayton <br /> will collect samples from hot spots to identify the worst-case contamination present. <br /> TASK 3: LABORATORY ANALYSIS <br /> The soil samples will be transferred under formal chain-of-custody documentation to a <br /> State of California-certified laboratory for analysis. Upon receipt at the laboratory, lab <br /> personnel will composite the five soil discrete drum soil samples together prior to <br /> analysis. Initially,the sidewall samples,the shallow soil sample from boring SB-1, and <br /> the composite soil sample from the soil drums will be analyzed for the following <br /> constituents: <br /> • EPA Method 8260B for total petroleum hydrocarbons as gasoline(TPH-g); benzene, <br /> toluene,ethylbenzene, and xylene(BTEX),and five fuel oxygenates, including <br /> MTBE. <br /> The remaining soil samples will be put on hold by the laboratory pending the results of <br /> the analyses. If the chemicals are detected or significant contamination is present, <br /> Clayton and the Hospital will select the additional samples to be analyzed. <br /> TASK 4: REPORT PREPARATION <br /> Upon completion of the above Tasks,Clayton will prepare a written report documenting <br /> the work performed and our findings,conclusions, and recommendations. We will <br /> include a diagram showing the sample locations. <br /> Clayton appreciates the opportunity to submit this workplan to you. If you have any <br /> questions or need additional information,please contact me at(925)426.2681. <br /> SAESTROJECTS\2005\05319 SJ Co=ty\Workp1=.dm <br />