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Sequoia 694 Chesapeake Drive Pedwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 _ <br /> 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 686 9640 FAX(510)686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 1&.,eocon Cllerlt Project 11) 58080-06-02 <br /> 1333 Sunco Dr, Suite 100 Matrix Sod <br /> Rancho Cordova, CA 95742 <br /> Attention Steve Greenfield QC Sample Goup 4110828, 830-833 Reported Dec 2, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> 1 <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> 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# LCS112494 LCS112494 LCS112494 LCS112494 LCS112294 <br /> Date Prepared 11/24/94 11/24/94 11/24/94 11/24/94 11/22/94 <br /> Date Analyzed 11/24/94 11/24/94 11/24/94 11/24/94 11/23/94 <br /> Instrument I D # GCHP-2 GCHP-2 GCHP-2 GCHP 2 GCHP-3B <br /> LCS °i6 <br /> Recovery 100 92 101 100 93 <br /> Control Limits. 75-125 75-125 75-125 75-125 60-130 <br /> MS/MSD <br />' Batch#: 4110831 4110831 4110831 4110631 4110845 <br /> Date Prepared 11/24/94 11/24/94 11/24/94 11/24/94 11/22/94 <br /> Date Analyzed 11/24/94 11/24/94 11/24/94 11/24/94 11/23/94 <br />' Instrument I.D # GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-3B <br /> Matrix Spike <br /> % Recovery 100 90 100 100 100 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 100 95 10o ss 92 <br /> Relative% <br />' Difference 0 0 5 4 00 20 83 <br /> SEQUOIA ANALYTICAL Please Note <br /> fThe LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> W <br /> U � preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sarnpie batch results Due to matrix effects,the OC limits for%?lS/MSD's are advisory only <br /> .iennie Higgins and are not used to accept or reject batch results <br /> Project Manager <br /> 411o830GEC <6> <br />