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Sequoia <br /> 680 Chemake Drive Redwood City,CA 94063 4P50)364-9600 FAX(650)364-9233 <br /> ' f <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> QP <br /> Analytical 1455 McDowell Blvd.North.Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services/ Client Project ID: Texaco 305 S. Hutchins <br /> 1680 Rogers Ave. <br /> San Jose, CA 95112 <br /> Attention: Fran Thie QC Sample Group: 9810726-02-04 Reported: Oct 22, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix: Liquid <br /> Method: EPA 801018020,601/602 <br /> Analyst: L. Kim <br /> ANALYTE 1,1-DCE TCE Chlorobenzene <br /> QC Batch#: GC1014980VOA24A <br /> Sample No.: 9810712-02 <br /> Date Prepared: 10/14/98 10/14/98 10/14/98 <br /> Date Analyzed: 10/14/98 10/14/98 10/14/98 <br /> Instrument I.D.#: gchp24.2 gchp24.2 gchp24.2 <br /> Sample Conc., ug/L: N.D. N.D. N.D. <br /> Conc.Spiked,ug/L: 25 25 25 <br /> Matrix Spike,ug/L: 22 20 23 <br /> % Recovery: 88 80 92 <br /> Matrix • <br /> pike Duplicate,ug/L: 20 20 22 <br /> %Recovery: 80 80 88 <br /> elative%Difference: 9.5 0.0 4.4 <br /> RPD Control Limits: 0-50 0-50 0-50 <br /> LCS Batch#: LCS101498A <br /> Date Prepared: 10/14/98 10/14/98 10/14/98 <br /> Date Analyzed: 10/14/98 10/14/98 10/14/98 <br /> Instrument I.D.#: gchp24.2 gchp24.2 gchp24.2 <br /> Conc.Spiked, ug/L: 25 25 25 <br /> Recovery,ug/L: 21 20 21 <br /> LCS% Recovery: 84 80 84 <br /> Percent Recovery Control Limits: <br /> MS/MSo 60-140 60-140 60-140 <br /> LCS 65-135 70-130 70-130 <br /> h,eggy <br /> nce Statement: All Stan and 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 /> NALYTICAL 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 matrix <br /> interference,the LCS recovery is to be used to validate the batch. <br /> erger <br />