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Sequoia 680 Chmveiike Dnve Pcelwood City CA 94063 (415) 361 9600 FAX(415)364.9233 <br /> 19o0 Bates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX(510)6b6-96e9 <br /> Analytical 319 Straker Avenue Suite 8 Sacramento C4 95834 (916) 921 9600 FAX(916)921.0100 <br /> roun "ovate Ti�hnology Client Project ID Chevron#9-M2, � =Repone�d <br /> 1401 Halyard Drive, Suite 140 Matrix Soil <br /> West Sacramento, CA 95691 <br /> Attention Jason Fedota OC Sample Group 5050264, 6fi, 69, 7t, 74-75,78-79 =19. 1M <br /> QUALITY CONTROL DATA REPORT <br /> ANAEWE Eth0- <br /> Benzene Toluene Benzene Xylenes TRPH <br /> Method. EPA 8020 EPA 8020 EPA 8020 EPA Bolo EPA 418 1 <br /> Analyst: C Chapman C Chapman C Chapman C Chapman VO/SP <br /> Concentration <br /> Spiked: 0 20 mg/kg 0 20 mg/kg 020 mg/kg 0 60 mg/kg 100 mg/kg <br /> LCS Batch#: LCS050995 LC$050995 LCS050995 LC5o50995 LCS051195 <br /> Date Prepared- 5/9/95 5/9/95 5/9/95 5/9/95 5/11/95 <br /> Date Analyzer!: 5/9/95 5/9/95 5/9/95 5/8/95 5/12/95 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 IR-1 <br />• LCS y <br /> Recovery.. <br /> 95 9095 93 88 <br /> Control Limits: 75-125 75-125 75-125 75-125 80-120 <br /> �„� t„ ,.. ..n :. .. , { c .„ ,. n ., M1 r .. ,.mt, H w,.xo•tr.....a w..},-,n,,.w.,,.;wa4 t3 :.lw.wx�.wk <br /> MS/MSD <br /> Batch #: 5050224 5450224 5050224 5050224 8S051195 <br /> Date Prepared: 5/9/95 5/9/95 5/9/95 5/9/95 5/11/95 <br /> Date Analyzed- 5/9/95 5/9/95 5/9/95 5/9/95 5/12/95 <br /> Instrument I D #. GCHP-1 GCHP-1 GCHP-1 GCHP-1 lR-1 <br /> Matrix Spike <br /> Be <br /> % Recovery- 90 95 95 93 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 95 95 95 95 $8 <br /> Relative °.6 <br /> Difference 54 00 0 0 21 0-0 <br /> SEQUOIA ANALYTICAL Please (Vote <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 OC limits for MS/MSDs are advisory only <br /> nda C Schneider and are not used to accept or reject batch results <br /> Prosect Manager <br /> 5050264 GRW <11> <br /> f <br />