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Se680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> tYOla <br /> q 404 N Wiger Lane Walnut Creek CA 94598 (925)9a8 9600 FAX(925)988 9673 <br /> 7ENGINEERING <br /> Analytical $19 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(9f6)921-01001455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792 1865 FAX(707)792-0342 <br /> Client Project ID EXXON 7 3942 5153942 1300 <br /> 3468 Mt Diablo Blvd Ste 8100 <br /> Lafayette CA 94549 # <br /> Attention Christa Marting QC Sample Group 9808C95 Reported Sep 24 1998 <br /> QUALITY CONTROL DATA REPORT ' <br /> Matrix Liquid � <br /> Method EPA 8015 <br /> Analyst D B <br /> ANALYTE Gasoline i <br /> QC Batch # GCO826986TEX02A <br /> Sample No <br /> Date Prepared 8/26198 <br /> Date Analyzed 8126198 ' <br /> Instrument I D # GCHP02 I{{{ <br /> } <br /> Sample Conc ug/L N D <br /> Conc Spiked ug/L 250 t <br /> Matrix Spike, ug/L 210 <br /> % Recovery 84 <br /> Matrix 9 <br /> ike Duplicate, ug/L 270 <br /> % Recovery 108 <br /> Relative % Difference 25 <br /> RPD Control Limits 0-25 <br /> LCS Batch# GWLCS082698A <br /> Date Prepared 8/26198 <br /> Date Analyzed 8/26/98 <br /> Instrument I D # GCHP02 <br /> Conc Spiked ug/L 250 <br /> LCS Recovery, ug/L 250 <br /> LCS % Recovery 100 <br /> Percent Recovery Control Limits <br /> MSIMSD 60140 <br /> LCS 70 130 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents <br /> EQLIQIA ANALYTICAL preparation and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quanttties of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> klei Mei hin interference the LCS recovery is to be used to validate the batch <br /> roject Manager <br /> f <br />