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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> a- ) 404 N Wiget Lane Walnut 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)92I ool00 <br /> qW 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Project ID Shell 141 N EI Dorado <br /> 1680 Rogers Ave <br /> San Jose, CA 95112 <br /> Attention Fran Thie QC Sample Group 9804G89-10 Reported May 14, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8010//601 <br /> Analyst L Kim <br /> ANALYTE 1,1-DCE TCE Chlorobenzene <br /> QC Batch# GC0505980VOA09A <br /> Sample No 9804150-01 <br /> Date Prepared 515198 515198 515198 <br /> Date Analyzed 515198 515198 515198 <br /> Instrument I D# gchp09 gchp09 gchp09 <br /> Sample Conc , ug1L 22 15 N D <br /> Conc Spiked, ug1L 25 25 25 <br /> Matrix Spike, uglL 42 20 20 <br /> % Recovery 80 74 80 <br /> Matrix <br /> pike Duplicate, uglL 43 20 20 <br /> % Recovery 84 74 80 <br /> elative% Difference 49 00 00 <br /> RPD Control Llmlts 0-50 0-50 0-50 <br /> LCS Batch# BLK050598BS <br /> Date Prepared 515198 515198 515198 <br /> Date Analyzed. 515198 515198 515198 <br /> Instrument 10# gchp09 gchp09 gchp09 <br /> Conc Spiked, ug1L 25 25 25 <br /> Recovery, ug1L 23 22 23 <br /> LCS % Recovery 92 88 92 <br /> Percent Recovery Control Limits <br /> MSIMSD 65-135 70-130 70130 <br /> LCS 65-135 70-130 70130 <br /> actManager <br /> ante 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 matnx that is analyzed using the same reagents <br /> ALYTICAL preparation and analytical 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 limas due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> r <br />