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Sequoia 6R0 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 rAX(415) 364 9233 <br /> 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 686 9600 rAX(5 t0)686 9689 <br /> nalytieal 819 Striker Avenue,Suite R Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Client Project ID 305 S Hutchins <br /> 13 Sunco Dr, Suite 100 Matrix Soli <br /> ,eincho Cordova, CA 95742 <br /> Attention John Juhrend OC Sample Goup 4111013-015 Reported Dec 6, 1994 v <br /> QUALITY CONTROL DATA REPORT <br /> 1 <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel <br />' EPA <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 8015 Mod <br /> t Analyst C Chapman C Chapman C Chapman C Chapman C Lee <br /> Concentration <br /> Spiked 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg 7 5 mg/kg <br />' LCS Batch# LCS120594 LCS120594 LCS120594 LCS120594 LCS112894 <br /> Date Prepared 12/5/94 12/5/94 12/5/94 12/5/94 11/28/94 <br />' Date Analyzed 12/5/94 12/5/94 12/5/94 12/5/94 11/29/94 <br /> Instrument I D # GCHP-1 GCHP-1 GCHP 1 GCHP-1 GCHP-3B <br /> LCS% <br /> Recovery 115 110 115 112 100 <br /> Control Limits 75-125 75-125 75-125 75-125 60-130 <br /> 1 t <br /> MS/MSD <br /> tBatch# 4120015 4120015 4120015 4120015 4111013 <br /> Date Prepared 12/5/94 12/5/94 12/5/94 12/5/94 11/28/94 <br /> Date Analyzed 12/5/94 12/5/94 12/5/94 12/5/94 11/29/94 <br />' Instrument I D # GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-3B <br /> Matrix Spike <br />' % Recovery 100 100 100 105 103 <br /> Matrix Spike <br />' Duplicate% <br /> Recovery 100 100 105 105 112 <br /> Relative% <br />' Difference. 00 00 4 9 0 0 8 4 <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 /> ¢,y�,+.+�� preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> U U validation of sample batch results Due to matrix effects,the QC limits for MS/MSDs are advisory only <br /> Jennie Higgins and are not used to accept or reject batch results <br /> Project Manager <br /> 4i11013GEC <4> <br />