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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 4D 411 lget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988 9673 <br /> V1170F Analytical 819 Straker Avenue,Swte 8 Sacramento,CA 95834 (916) 92t 9600 FAX(916)921 0100 <br /> egro West, Inc F Client project Il] Eocon#7-0137, Siocicton <br /> 1050 Melody Lane, Ste 160 Matrix Water <br /> Roseville, CA 95678 <br /> Attention Mark Naugle QC Sample Group 6011075-81 Reported Feb 7, 1996 <br /> Y Y <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene - Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst v Cravens v Owens v Owens v Owens <br /> Concentration <br /> Spiked io ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch# LCS020296 LCS020296 LCS020296 LCS020296 <br /> Date Prepared- 02/02/96 02/02/96 02/02/96 02/02/96 <br /> Date Analyzed. 02/02/96 02/02/96 02/02/96 02/02/96 <br /> Instrument I.D.# GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> • LCS y <br /> Recovery:: <br /> 99 99 toa 101 <br /> Control Limits. 75-125 75-125 75-125 75-125 <br /> ti v v r r ♦mn r '.x r . ^ ..xra r e m r x i.rr A r . x n, v r t <br /> MS/MSD <br /> Bated#: BS020296 BS020296 BS020296 BS020296 <br /> Date Prepared: 02/02/96 02/02/96 02/02/96 02/02/96 <br /> Date Analyzed: 02/02/96 02/02/96 02/02/96 02/02/96 <br /> Instrument I.D.#. GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> % Recovery: 90 93 92 94 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery- g8 100 101 102 <br /> Relative% <br /> Difference- 85 72 93 82 <br /> SEQUOIA 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/Sacramento Laboratory <br /> 6011075 FUG <6> <br />