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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 1900 Bates Avenue Suite L Concord CA 94520 (510) 686-9600 FAX(5 10)686-%89 <br /> Iwo Analytical 819 Sinker Avawc Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br />• 4 s, n ;{ t .� ,lxcad,rco,c.<x�v>fa+`�`r. <br /> FUgro West, nc A Client Project ID Shell, 141 N <br /> oj ^ I=1 DorStockton, CA <br /> 1050 Melody Lane, Ste 160 Matrix Water/ Air <br /> Roseville, CA 95678 <br /> Attention Sudhakar Talanki OC Sample Goup 5040530-533 Reported Apr 26, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 24-Dlnitro- Penta- <br /> Acenaphthene 4-Nttro henol toluene chloro henoi =Gne <br /> Method: EPA 625 EPA 625 EPA 625 EPA 825 EPA 625 <br /> Analyst. S Le S Le S Le S Le S Le <br /> Concentration <br /> Spiked. 100 ug/L 200 ug/L 100 ug/L 200 us/L too Ng/L <br /> LCS Batch#- LCSO41795 LCSO41795 LCSO41795 LCSO41795 LCS041795 <br /> Date Prepared: 4/17/95 4/17/95 4/17/95 4/17/95 4/17/95 <br /> Date Analyzed- 4/19/95 4/19/95 4/19/95 4/19/95 4/19/95 <br /> Instrument I D #' GC/MS 1 GC/MS 1 GC/MS 1 GC/MS 1 GC/MS 1 <br /> . LCS % <br /> Recovery 66 33 50 47 62 <br /> Control Limits: 46-118 10-80 24-96 9-103 26-127 <br /> MS/MSD <br /> Batch#' BLK041795 BLK041795 8LK041795 BLK041795 BLK041795 <br /> Date Prepared. 4/17/95 4/17/95 4/17/95 4/17/95 4/17/95 <br /> Date Analyzed. 4/19/95 4/19/95 4/19/95 4/19/95 4/19/95 <br /> Instrument LD #' GC/MS 1 GC/MS 1 GC/MS 1 GC/MS 1 GC/MS 1 <br /> Matrix Spike <br /> % Recovery- 66 33 50 47 62 <br /> Matrox Spike <br /> Duplicate% <br /> Recovery- 66 31 48 43 62 <br /> Relative% <br /> Difference: 0 0 63 4 1 89 00 <br /> WEQUOIA ANALYTICAL Please Note <br /> The LCS 1s a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> f IJ r�L C�m) �.�,,� preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> LL ' + f� `/l-4t validation of sample batch results Due to matrix effects,the CC limifs for MS/MSD's are advisory only <br /> Undo C c neide�r and are not used to accept or reject batch results <br /> Project Manager Page 2 of 2 <br /> 5040530 FUG a 12> <br />