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Sequoia 680 Chesapeake Drive Redwood Gry CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> 1900 Bates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX(510) 686 9689 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> � v <br /> PFUgro West, inc Client Project ID She!!, 2575 Country Clut, Blvd,Stockton, CA v <br /> 1050 Melody Lane, Ste 160 Matrix Soil <br /> Roseville, CA 95678 <br /> Attention Sudhakar Talanki QC Sample Group 5050998-1014 Reported May 31, 1995 <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 C Lee C Lee C Lee C Lee <br /> Concentration <br /> Spiked 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg <br /> LCS Batch# LCS053095 LCS053095 LCS053095 LCS053095 <br /> Date prepared 5/30/95 5/30/95 5/30/95 5/30/95 <br /> Date Analyzed 5/30/95 5/30/95 5/30/95 5/30/95 <br /> Instrument I D # GCHP-2 GCHP-2 GCHP-2 GCHP 2 <br /> . LCS % <br /> Recovery 93 94 94 94 <br /> Control Limits. 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch # 5051562 5051562 5051562 5051562 <br /> Date Prepared 5/30/95 5/30/95 5/30/95 5/30/95 <br /> Date Analyzed 5/30/95 5/30/95 5/30/95 5/30/95 <br /> Instrument I D # GCHP 2 GCHP-2 GCHP-2 GCHP-2 <br /> Matrix Spike <br /> % Recovery. 94 92 96 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery- 92 92 94 91 <br /> Relative % <br /> Difference 2 2 00 21 22 <br /> EQUOIA ANALYTICAL Please Note <br /> The LCS 1s a control sample of known,interferent free matrix that 1s analyzed using the same reagents, <br /> i��// �� 1 _/ i preparation and analytical methods employed for the samples The LCS%recovery data Is used for <br /> '/�G C C ( � validation of sample batch results Due to matnx 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 <br /> 5050998 FUG <a> <br />