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Sequoia 9 680 Chesapeake Drive Redwood City CA 940 (415) 364 9600 FAX (415) 364 9233 <br /> 1900 Bates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX (5 10)686 9689 <br /> Analytical 819 Striker Avenue Suitt 8 Sacramento CA 95834 (9163) 921 9600 IAX(916) 921 0100 <br /> radient Client Project 1D Apache Plastics <br /> 9 Kimberly Rd Matrix Water <br /> Cameron Park, CA 95682 <br /> Attention Clyde Hebbron OC Sample Goup 4110480-482 Reported Nov 17, 1994 <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 2 0 mg/m3 2 0 mg/m3 2 0 mg/m3 6 0 mg/m3 <br /> UCS Batch# LCS111194 LC8111194 LCS111194 LCS111194 <br /> Date Prepared 11/11/94 11/11/94 11/11/94 11/11/94 <br /> Date Analyzed 11/11/94 11/11/94 11/11/94 11/11/94 <br /> Instrument I D #• GCHP-2 GCHP 2 GCHP-2 GCHP-2 <br /> LCS % <br /> Recovery 105 105 100 98 <br /> Control Limits 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch# BLK111194 BLK111194 BLK111194 BLK111194 <br /> Date Prepared 11/11/94 11/11/94 11/11/94 11/11/94 <br /> Date Analyzed 11/11/94 11/11/94 11/11/94 11/11/94 <br /> Instrument I D # GCHP-2 GCHP-2 GCHP 2 GCHP-2 <br /> Matrix Spike <br /> % Recovery 105 105 100 98 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 105 105 105 105 <br /> Relative % <br /> Difference 00 00 49 69 _ <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 /> iie <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 QC limits for M5/MSDs are advisory only <br /> J Higgins and are not used to accept or reject batch results <br /> Project Manager <br /> 4110480 UPG <2? <br />