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} <br /> Sequoia 680 Chewpeake Drive Redwoc3 City,CA A 9 364.96017 FAX(415 <br /> r✓^ 4063 (415) )364• 3 <br /> Analytical 404 N.11VIact Lane Val—Val—Creek G 94598 (510) 988.9600 FAX(S 10)988.96%773 <br /> 819 Striker Avenue,Suite 8 Sacramento,G 95834 (916) 911.9600 FAX(916)92 f•o Ioo <br /> :;:�w);;s:<��,^?:`;s.',xN�ir.".;cR'?.!��!•`.:its��/////x�,Feu<•.r7..:sx:::::;w.;.^v.?,;:, �v.;'.i�r r .n ,; .",: <br /> Alton Geosc�ence n.v:..,. :..�\\\\\\\.. . =ri.. \\ r�a�� .. �/,r\\\�\� \�\ <br /> Client�rofect lb- K4061464-343'l`racy <br /> 30-A Lindbergh Ave. Matrb(: Liquid <br /> Livermore, CA 94550 <br /> Attention: Allsa LeMay QC Sample Group: 5081083-100 Re <br /> port <br /> ed: Aug 28, 1995:; <br /> QUALITY CONTROL DATA REPORT <br /> ' Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GC082295 G0082295 G0082295 GCO82295 <br /> ' 802004A 802004A 802004A 802004A <br /> Analy. Method: EPA8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: <br /> ' Analyst: K.Nill K.N111 K.Nil] K.Nill <br /> MS/MSD#: 5081092 5081092 5081092 5081092 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 8/22/95 8/22/95 8/22/95 8/22/95 <br /> Analyzed Date: 8/22/95 8/22/95 8/22/95 8/22/95 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> Conc.Spiked: 20pg/L 20Ng/L 20yg/L 60u9/L <br /> Result: 20 21 21 63 <br /> MS % Recovery: 100 105 105 105 <br /> Dup. Result: 18 19 19 58 <br /> MSD %Recov.: 90 95 95 9.7 <br /> ' RPD: 11 10 10 8.3 <br /> RPD Limit: 0.20 ago ago ago <br /> ..:::::........:.::::: <br /> ... .............vi:::r:::.sr.:titi•+iii::"+"+:i,..r.4:....�.:.v:..Vin..-,..::x:::un�::xv:}:-:2i:•}:r;��..�v...-. ..:...........x ... .....................�::... <br /> LCS #: 2LCS082295 2LCS082295 2LCS082295 2LCS082295 <br /> ' Prepared Date: 8/22/95 8/22/95 8/22/95 8/22/95 <br /> Analyzed Date: 8/22/95 8/22/95 8/22/95 8/22/95 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> Conc. Spiked: 20ug/L 20pg/L 20pg/L 60pg/L <br /> LCS Result: 20 21 21 84 <br /> LCS %Recov.: 100 105 106 106 <br /> LCS 71-133 72-128 72-130 71-120 <br /> ' Control Limits <br /> Please Note: <br /> The LCS Is a control sample of known,Interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL, #1271 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. 4 <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recoveryIs to be used to validate the batch. <br /> Ke an Sla rook **M =Matrix pike,M D=M Duplicate,RPD=Relative%Difference <br /> Project Manag <br /> 5081083-ALT <13> <br />