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I <br /> mpling Intervals <br /> The proposed sampling interval in each of the three borings for this assessment is five (5) feet or <br /> at a change in lithology. <br /> Sampling Procedures <br /> Samples will be obtained from ahead of the lead auger with a pre-cleaned California Split Spoon <br /> Sampler. The sampler will be loaded with three (3) pre-cleaned two inch by six inch brass tubes. <br /> Upon retrieval of the sampler the middle brass tube will be recovered and the ends will be capped <br /> with Teflon tape and plastic caps. The caps will then be sealed with tape and the sample labeled <br /> and placed on ice. The sample number, sample depth, and the time and date the sample was <br /> obtained will be recorded on both the sample label and on the chain of custody form. <br /> Analytical Test Methods <br /> Each of the samples obtained will be analyzed for total petroleum hydrocarbons quantified as <br /> gasoline and as diesel fuel and for purgeable aromatic hydrocarbons, including MTBE, utilizing <br /> DHS modified Method 8015-m and EPA method 8020, respectively. <br /> If MTBE is detected in a sample, the presence of MTBE will be confirmed utilizing EPA Method <br /> 8260. <br /> Boring Abandonment <br /> Upon the completion of the borings, the borings will be abandoned with a mixture of cement and <br /> bentonite grout premixed and trimmed down the boring. <br /> Reporting <br /> A report summarizing our findings and conclusions will be prepared and submitted to the San <br /> Joaquin County Public Health Division. <br /> If you have any questions or comments , or need further assistance, please refer to Project No. <br /> 99-1261 to expedite your requests. <br /> Respectfully Submitted, <br /> ANTHONY-TAYLOR CONSULTANTS <br /> An Anthony-Taylor Company <br /> Michael J. Barnett er L. c al, P.E., REA <br /> Environmental Division Manager S for Pr ' ct Engineer <br /> RCE 42590, REA 04196 <br /> I <br />