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Table 3 <br /> Summary of Laboratory Quality Assurance Notations <br /> ARCO Service Station No. 5469 <br /> 130 S. Wilson Way <br /> Stockton, CA <br /> Based on the review of the electronic and hardcopy data (chain-of-custody records, blanks, dilutions, <br /> holding times, E_CSILCSD results, MS/MSD results, and surrogate recoveries), the data are acceptable as <br /> reported by the laboratory with the following limitations: <br /> 1) The TPHg results for MW-4, MW-5, and MW-6 are estimated due to continuing calibration verification <br /> falling outside acceptance criteria. <br /> 2) TPHg results for MW-5, MW-6, and MW-7 are due to a discrete peak in the Cs—C, range (probably <br /> MTBE). <br /> 3) TPHg results for MW-5 and MW-6 may be biased low due to analysis past holding time. <br /> 4) Elevated reporting limits were due to dilutions performed by the laboratory in order to quantitate a <br /> target analyte. <br /> 5) In the TPHg analysis of sample MW-8, the hydrocarbon pattern present is within the gasoline <br /> quantitation range but does not resemble the pattern for gasoline. <br /> i <br /> PABp-Arco for URS\54691Quarterly\2002\Arco_5469_4Q02.doc STRATUS <br />