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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-%00 FAX(650)364-9233 <br /> 404 N Wlget lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> a- Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> {� Kv\�-h^ yr ," ry -Vv -­ v ;t v 'c-'- '. oV 3'S <br /> iiClient �roet ID S#6981;5try oc tonttler-Ran-Oubj <br /> 77 Sierra Court, Suite J Matrix Liquid i <br /> " DFUbIln, CA 94568 <br /> " Attention Deanna Harding QC Sample Group 8071520-532 Reported Aug 11, 1998 <br /> f SrL YJ 9}}]`tt• .. '+amu h Y}Jx� r t u v aY.vH M,yv:,.t,.,. v O�ti.+Fnvr^. w ,,.. ^M { r tt A?V`~S ,. nn4'v.V]'v0 npx♦A ,. .. ,. f <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes MTBE <br /> Benzene <br /> QC Batch#: GCO80398 GCO80398 GC080398 GCO80398 MS072798 <br /> 802009A 802009A 802009A 802009A 8260$2A <br /> Analy Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8260 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst K Nill K.Nil] K Nill K Nill N Nelson <br /> MS/MSD #. 8071528 8071528 8071528 8071528 8071292 <br /> Sample Cone.: N D N D N D N 0 36pg/L <br /> Prepared Date: 8/3/98 8/3/98 8/3/98 8/3/98 7/27/98 <br /> Analyzed Date. 8/3/98 8/3/98 8/3/98 8/3/98 7/27/98 <br /> Instrument I.D.# HP-9 HP-9 HP-9 HP-9 GC/MS-2 <br /> Cone. Spiked. 20pg/L 20pg/L 20pg/L 60ug/L 50pg/L <br /> Result: 18 20 22 65 54 <br /> MS%Recovery 90 100 110 108 101 <br /> Dup. Result: 18 19 22 63 56 <br /> SD % Recov 90 95 110 105 105 <br /> f RPD 00 51 00 31 36 <br /> RPD Limit: 0-20 0.20 0-20 0-20 0.25 <br /> LCS # 9LCS080398 91-CS080398 9LCS080398 9LCS080398 LCS082798 <br /> Prepared Date: 8/3/98 8/3/98 8/3/98 8/3/98 7/27/98 <br /> Analyzed Date 8/3/98 8/3/98 8/3/98 8/3/98 7/27/98 <br /> Instrument I D # HP-9 HP-9 HP-9 HP-9 GC/MS-2 <br /> Cone. Spiked. 20pg/L 20pg/L 20ug/L 60.ug/L 50ug/L <br /> LCS Result, 17 19 21 60 45 <br /> LL.'S % R£cov.. 85 95 105 100 90 <br /> LCS 70-13G 70-130 70-130 70-130 65-135 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-tree matnx that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL, #1271 preparation,and analytical methods employed for the samples The matnx spike is an aliquot of sample <br /> 1 fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> 6hL 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 /> ulianne Fegley "*M =Matrix Spike,M D=MS Duplicate,RPD=Relative%Difference <br /> Project Manager <br /> 8071520 GET <16> <br />