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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Wainut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)9Z1-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> • <br /> Blaine Tech Services Client Project ID Chevron 9-2033/980521-L1 <br /> 1680 RogerS Avenue <br /> San Jose, CA 95112 <br /> Attention Fran Thie QC Sample Group 9805E75-01 Reported Jun 3, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015A <br /> Analyst G WARDLE <br /> ANALYTE Diesel <br /> QC Batch # GCO526980HBPEXZ <br /> Sample No 9805E78-2 <br /> Date Prepared 5/26198 <br /> Date Analyzed 5/28198 <br /> Instrument I D # GCHP4A <br /> Sample Conc , ug/L 780 <br /> Conc Spiked ug/L 1000 <br /> Matrix Spike, ug/L 1500 <br /> % Recovery 72 <br /> . Matrix <br /> Spike Duplicate, ug/L 1400 <br /> % Recovery 62 <br /> Relative % Difference 15 <br /> RPD Control Limits 0-50 <br /> LCS Batch# BLK052698ZS <br /> Date Prepared 5/26/98 <br /> Date Analyzed 5/28/98 <br /> Instrument I D # GCHP4A <br /> Conc Spiked, ug/L 1000 <br /> Recovery, ug/L 730 <br /> LCS % Recovery 73 <br /> Percent Recovery Control Limits <br /> IVISIMS0 50150 <br /> LCS 60 140 <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 /> 7SEQUOIAALYTICAL 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 fall within specified control limits due to matrixver <br /> interference the LCS recois to be used to validate the batch <br /> regory <br /> 4rct/"Manager <br />