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+ 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916) 921-0100 <br /> EMCON/Pinnacle-Sacramento Project ARCO 2130,Stockton,CA Sampled 9/2/99 <br /> 1433 N Market Blvd Project Number 21775-229 003 Received 9/3/99 <br /> Sacramento,CA 95834 Project Manager Dave Foley Re orted 9/20/99 <br /> Notes and Definitions <br /> # Note <br /> D Data reported from a dilution <br /> 1 Chromatogram Pattern Weathered Gas C6-C8 <br /> 2 Chromatogram Pattern Weathered Gasoline C6-C12+Unidentified Hydrocarbons C6-C12 <br /> 3 The surrogate recovery for this sample is outside of established control limits due to a sample matrix effect <br /> 4 Chromatogram Pattem Unidentified Hydrocarbons C6-C12 <br /> 5 The RPD and/or percent recovery for this QC spike sample cannot be accurately calculated due to sample dilution required from <br /> high analyte concentration and/or matrix interferences <br /> 6 The RPD value for this QC sample is above the established control limit Review of associated QC indicates the high RPD does not <br /> represent an out-of-control condition for the batch <br /> Analyte DETECTED <br /> ND Analyte NOT DETECTED at or above the reporting limit <br /> NR Not Reported <br /> dry Sample results reported on a dry weight basis <br /> Recov Recovery <br /> RPD Relative Percent Difference <br /> is Analytical-Sacramento <br /> Page 12 of 12 <br />