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Sequoia 680 Chesapeake Drive Redwood Cry CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> ' 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> 1455 McDowell Sivd North Ste D Petaluma,CA 94954 (707) 792 1865 FAX(707) 792-0342 <br /> Blaine Tech Services Client Project ID Chevron 9-8632;980810-T2 <br /> 1680 Rogers Avenue <br /> San Jose, CA 95112 <br /> Attention Fran Thle QC Sample Group 9808853-01 Reported Aug 31 1998 <br /> P <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015A <br /> Analyst A PORTER <br /> ANALYTE Diesel <br /> QC Batch # GC0820980HBPEXD <br /> Sample No 9808853 1 <br /> Date Prepared 8120/98 <br /> Date Analyzed 8122!98 <br /> Instrument 1 D # GCHPSA <br /> Sample Conc ug1L 88 <br /> Conc Spiked ug/L 1000 <br /> Matrix Spike ug/L 960 <br /> % Recovery 87 <br /> Matrix <br /> Sp-ke Duplicate uglL 1000 <br /> % Recovery 91 <br /> Relative % Difference 4 5 <br /> RPD Control Limits 0 50 <br /> LCS Batch# BLK082098DS <br /> Date Prepared 8120198 <br /> Date Analyzed 8122198 <br /> Instrument I D # GCHP5A <br /> Conc Spiked ug/L 1000 <br /> Recovery ug/L 820 <br /> LCS % Recovery 82 <br /> Percent Recovery Control Limits <br /> F- <br /> VISIMSD 50 150 <br /> LCS 60 tap <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> Please Note <br /> The LCS is a control sampie of known interferent free matrix that is analyzed using the same reagents <br /> EQU01 YTICAL preparation and analytical methods employed for the samples The matrix spike is an aligriot 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 matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> gory <br /> t Manager <br /> z`� <br />