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rr <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364.9600 FAX(415)364-9233 <br /> 404 510 N.Wigct Lane Walnut Creek,CA 94598 <br /> ( ) 988-9600 FAX(510)988-9673 <br /> 41) Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921.0100 <br /> ;x Alton Geoscience:. <br /> ent Protect 117: Mabll #04-343 <br /> �. 30-A Lindbergh Ave. Matrix: Liquid <br /> Livermore, CA 94550 <br /> Attention: Ailsa Le May QC Sample Group: 7010735-744 <br /> Re ported: .tan 21 1 <br /> :.:..,....... .n.:. P 997=< <br /> :...:.. <br /> QUALITY CONTROL DATA REPORT <br /> �. Analyte: Benzene Toluene Ethyl Xylenes Diesel MTBE <br /> Benzene <br /> ' QC Batch#: GC011797 GOO 11797 GCO11797 GC011797 SP011797 MS012297 <br /> rV 802004A 802004A 802004A 802004A 8015EXA MTBEHGA <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 EPA 8260 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 3510 - <br /> Analyst: K.Nill K.Nil! K.Nill K.Nill D,Sharma L.Duong <br /> L• M S/MSD#: 7010738 7010738 7010738 7010738 B LK011797 9701A8001 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 1/17/97 1/17/97 1/17/97 1/17/97 1/17/97 1/22/97 <br /> Iv Analyzed Date: 1/17/97 1/17/97 1/17/97 1/17/97 1/22/97 1/22/97 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 HP-3A H-6 <br /> Conc.Spiked: 20pg/L 20pg/L 20pg/L 60pg/L 300pg/L 50pg/L <br /> �+ Result: 16 17 17 53 270 47 <br /> MS %Recovery: 80 85 85 88 90 94 <br /> �. Dup. Result: 15 17 17 51 300 47 <br /> MSD %Recov.: 75 85 85 85 100 94 <br /> RPD: 6.5 0.0 0.0 3.9 11 0.0 <br />�+ RPD Limit: 0-25 0-25 0-25 0-25 0-50 0-25 <br /> .4:4::::':::':`:..J:v:iii:}::'::::v:{:-:!i�!.'.:i•::.:?::::.::::::: ...:... .............! HEM:^ :,:.:: <br /> LCS#: 4LCS011797 4LCS011797 4LCS011797 4LCS011797 LCS011797 VD80122S <br /> Prepared Date: 1/17/97 1/17/97 1/17/97 1/17/97 1/17/97 1/22/97 <br />�+ Analyzed Date: 1/17/97 1/17/97 1/17/97 1/17/97 1/22/97 1/22/97 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 HP-3A H-6 <br /> Conc. Spiked: 20pg/L 20pg/L 20pg/L 60pg/L 306pg/L 50pg/L <br /> LCS Result: 16 18 17 53 300 48 <br /> LCS %Recov.: 80 90 85 88 100 96 <br /> LCS 70-130 70-130 70-130 70-130 60-140 60-140 <br /> Control Limits <br /> Please Note: <br /> u.. The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> EQ€JOIA A L [CAL,#1271 preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> &#1210 fortified with known quantities of specific compounds and subjected to the entire analytical procedure. H <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> J" interference,the LCS recovery is to be used to validate the batch. <br /> SII g va **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br />' Pr'Qjetit Manager <br /> �f 7010735.ALT <6> <br />