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4D— Sequoia 680 Chesapeake Drive Redwood CA-M CA 94063 (415) 354-9600 FAX(415)364-9233 <br /> "'' 'get Lane Waft Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical <br /> 819 Straker Avenue,Suite 8 Sacramento,CA 95834 (916) 931-9600 FAX(916)921-0100 <br /> aa.' x r rv,r.} <br /> gro Vii@5t, InC � h n{j�hnyr..N].v�'.vr0]ttlJhv vary�n w,v9{v,z$Qui <br /> Cllent tiroject tC n E)ocon#7-0137, Stockton, CA <br /> k 1050 Melody Lane, Ste 160 Matrix Water y <br /> } Roseville, CA 95678 <br /> Attention Mark Naugle QC Sample Group 5100890,896 Reported Nov 2, 1995 <br /> $°: v u • r N <br /> v x . l' w vhv4n' , v,. ,.aJG w M.{hn..:'r�r.W� v'.�[.^." x V'i}iv v x...F'✓ r .. a..i rvi.Yuv+dG.'ii) ..vwrtSr v av. , <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 5020 <br /> Analyst. C Chapman C Chapman C Chapman C Chapman <br /> Concentration <br /> Spiked: 10pg/L 10vg/L 10,tg/L 30pg/L <br /> LCS Batch#- LCS102595 LCS102595 LCS102595 LCS102595 <br /> Date Prepared. 10/25/95 10/25/95 10/25/95 10/25/95 <br /> Date Analyzed: 10/25/95 10/25/95 10/25/95 10/25/95 <br /> Instrument I D.# GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> LCS <br /> Recovery: 98 98 99 95 <br /> Control Limits' 75-125 75-125 75-125 75-125 <br /> �,.•r . , , , n " h ., yr ., r a Zvi axK hn v, u s rc,'n r LYS✓v vx vin n <br /> n9 v SA} "U?, uw „�^hti aw`rn }air 5+nrwan <br /> MS/MSD <br /> Batch#: BS102595 BS102595 BS102595 BS102595 <br /> Date Prepared' 10/25/95 10/25/95 10/25/95 10/25/95 <br /> Date Analyzed: 10/25/95 10/25/95 10/25/95 10/25/95 <br /> Instrument I D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Matrix Spike <br /> %Recovery: 89 as 91 91 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery- 88 87 87 57 <br /> Relative% <br /> Difference- 46 11 45 45 <br /> SE UOIA ANALYTICAL Please Note <br /> The LCS Is a control sample of known,Interferent free matrix that Is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples The LCS%recovery data Is used for <br /> validation of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> Linda C Schneider and are not used to accept or reject batch results <br /> Project Manager <br /> 5100890 FUG <4> <br />