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v <br /> Tosco Marketing Company 3 <br /> Circle K Service Station 8671, Stoc,_.,n, CA May 11, 1998 <br /> Laboratory Procedures <br /> Soil samples collected during product line and dispenser upgrade activities will be <br /> submitted to the laboratory and analyzed for the presence of total petroleum <br /> hydrocarbons calculated as gasoline (TPH-g), benzene, toluene, ethylbenzene, xylenes <br /> (BTEX compounds), and methyl tertiary butyl ether (MtBE) by EPA Methods 8015 and <br /> 8020. In addition, one selected soil sample collected from beneath the dispensers will be <br /> analyzed for fuel oxygenates by EPA Method 8260. <br /> Reporting and Schedule <br /> SECOR anticipates initiating field activities during May 1998 . After completion of the <br /> field work and laboratory analyses, the data will be evaluated and assembled into a <br /> report. Included in the report will be soil analytical results, chain-of-custody <br /> documentation, a summary of field observations, assessment, and conclusions. This <br /> report will be submitted to the SJCEHD within 6 to 8 weeks of receiving analytical <br /> sample results from the laboratory. <br /> If there are any questions regarding the contents of this addendum to work plan, please <br /> call us at (916) 364- 1880 . <br /> Sincerely, <br /> SSECCORR International Incorporated <br /> Rusty E. Benko �y <br /> Project Engin r ;; ,� INN <br /> �xL <br /> BAROU; IN <br /> Greg Barclay <br /> Senior Geologist <br /> RG 6260 <br /> Attachments: Figure 1 - Site Map <br /> Attachment A - Field and Laboratory Procedures <br /> cc: Mr. Ed Ralston, Tosco Marketing Company <br /> Ms. Elizabeth Thayer, RWQCB - Central Valley Region <br /> 7G888-010-01/addendam.doc <br />