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Sequoia 680 Chesapeake Dnve Redwood Cary CA 94063 (650) 364 9600 FAX(650) 364-9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (925)988-%00 FAX(925)988-9673 <br /> Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D retaiuma,CA 94954 (707)792 1865 FAX(707) 792-0342 <br /> Blaine Tech Services Client Project ID Chevron 9-20331980811-P1 <br /> I <br /> 1680 Rogers Avenue <br /> San Jose, CA 95112 <br /> Attention Fran Thie QC Sample Group 9808956-01 Reported Aug 28 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8010/8020 6011602 <br /> Analyst C Medina <br /> ANALYTE 1 1-DCE TCE Chlorobenzene Benzene Toluene Chlorobenzene <br /> QC Batch # GC0824980VOA24A <br /> Sample No 9808546 01 <br /> Date Prepared 8/21/98 8121198 8121198 8121198 8121198 8121198 <br /> Date Analyzed 8/21/98 8121198 8121198 8/21/98 8121198 8/21198 <br /> Instrument I D # gchp24 2 gchp24 2 gchp24 2 gchp24 2 gchp24 2 gchp24 2 <br /> Sample Conc u91L N D N D N D N D N 0 N D <br /> Conc Spiked ugIL 25 25 25 25 25 25 <br /> Matrix Spike ugIL 23 22 23 23 22 20 <br /> % Recovery 92 88 92 92 88 80 <br /> Matrix <br /> Spike Duplicate ug]L 24 21 24 25 23 22 <br /> % Recovery 96 84 96 100 92 88 <br /> Relative % Difference 4 3 4 7 4 3 8 3 44 9 5 <br /> RPD Control Limits 0 50 0-50 0-50 0 50 0 50 0 50 <br /> LCS Batch# VWLCS082498A <br /> Date Prepared 8124/98 8/24198 8124198 8124198 8124198 8/24198 <br /> Date Analyzed 8124198 8/24198 8/24/98 8124198 8124/98 8124198 <br /> instrument I D # gchp24 2 gchp24 2 gchp24 2 gchp24 2 gchp24 2 gchp24 2 <br /> Conc Spiked ug/L 25 25 25 25 25 25 <br /> Recovery ug/L 24 23 26 26 24 23 <br /> LCS % Recovery 96 92 104 104 96 92 <br /> Percent Recovery Control Limits <br /> F- <br /> MS/MSD 60140 60 140 60 140 60140 60140 60 140 <br /> LCS 65 135 70 130 70 130 70 130 70130 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 tree matrix that is analyzed using the same reagents <br /> LYTICAL preparation and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fait within specified control limits due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> 114M yager <br />