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Sequoia <br /> 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> Analytical 1900 Bates Avenue Suite L Concord,CA 94520 (510) 686 9600 FAX(510)686-9689 <br /> 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> IbFug�r_o' eSt,YInc��vY:knv�ii4.u+n. nA.�r�va4 <br /> W Client Project ID Shell, 4315Waterloo Rd,, Stockton,'CA" <br /> 1050 Melody Lane, Ste 160 Matrix Sod w <br /> Roseville, CA 95678 <br /> Attention David L Poulsen CC Sample Goup 501-0195 Reported Jan 11, 1995 <br /> . ,.'.,2 r.. ,.>x r v,. r r l S } s} L r . } �vvd I r " <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method. EPA 8020 EPA 8020 EPA 9020 EPA 13020 <br /> Analyst- C Chapman C Chapman C Chapman C Chapman <br /> Concentration <br /> Spiked- 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg <br /> LCS Batch#- LCS010995 1-CS010995 LCS010995 LCS010995 <br /> Date Prepared 1/9/95 1/9/95 1/9/95 1/9/95 <br />' Data Analyzed, 1/9/95 1/9/95 1/9/9s 1/9/95 <br /> Instrument I D #- GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> LCS % <br /> Recovery: 105 100 los 102 <br /> Control Limits: 75-125 75-125 75-125 75-125 <br />' MS/MSD <br /> Batch #- 5010150 5010150 5010150 5010150 <br /> Date Prepared: 1/9/95 1/9/95 1/9/95 1/9/95 <br />' Date Analyzed: 1/9/95 1/9/95 1/9/95 1/9/95 <br /> Instrument I D.#- GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> % Recovery 100 100 100 100 <br /> Matrix Spike <br />' Duplicate % <br /> Recovery- 105 100 105 102 <br /> Relative % <br /> Difference 49 00 49 20 <br /> SEQ OIA ANALYTICAL Please Note <br /> 7 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 /> U G 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 refect batch results <br /> Project Manager <br /> 5010195 FUG <3> <br />