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' 686sapeake Drive Redwood City CA 94P (650) 364-9600 FAX(650)364-9233 <br /> t Sequoia 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 /> i Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)79Z-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Project ID Shell 341 E Main St <br /> 1680 Rogers Ave <br /> San Jose, CA 95112 <br /> Attention Fran Thie QC Sample Group 9810730-01 Reported Oct 21 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 801018020, 6011602 <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 95 00 44 <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,ug1L 25 25 25 <br /> Recovery, ug/L 21 20 21 <br /> LCS%Recovery 84 80 84 <br /> Percent Recovery Control Limits <br /> IVISIMSD 60-140 60-140 60-140 <br /> LC5 65-135 70-130 70-130 <br /> Quality As(NAL <br /> a 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 />�S QUOIA rearation a yticat methods employed for the samples The matnx 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 matnx <br /> interference the LCS recovery is to be used to validate the batch <br /> P'Sggy-Penner <br /> Project Manager <br />