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Sequoia o 680 Chesapeake Drive Redwood City, CA 90 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget lane Walnut Creek, CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> h <br /> Y } <br /> pgradlerit Cnvlronmentaf Client project ID Apache plastics <br /> P O Box 8002 Matrix Water/Air <br /> Stockton, CA 95208 <br /> Attention Vic Cherven OC Sample Group 6120105-7 Reported Dec 13, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethy)- <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 /> LCS Batch#: LCS120596 LCS120596 LCS120596 LOS 120596 <br /> Date Prepared, 12/05/96 12/05/96 12/05/96 12/05/96 <br /> Date Analyzed, 12/05/96 12/05/96 12/05/96 12/05/96 <br /> Instrument I.D.#' GCHP-7 GCHP-7 GCHP-7 GCHP-7 <br /> LCS% <br /> Recovery 100 102 103 103 <br /> Control Limits. 70-130 70-130 70-130 70-130 <br /> MS/MSD <br /> Batch#: BS120596 BS120596 SS120596 BS120596 <br /> Date Prepared 12/05/96 12/05/96 12/05/96 12/05/96 <br /> Date Analyzed 12/05/96 12/05/96 12/05/96 12/05/96 <br /> Instrument I D# GCHP-7 GCHP-7 GCHP-7 GCHP-7 <br /> Matrix Spike <br /> iib Recovery' 100 102 103 103 <br /> Matrix Spike <br /> Dupllcate % <br /> Recovery. 104 106 105 106 <br /> Relative% <br /> - Difference 3 9 as 2 9 2 9 <br /> SE01101A ANALYTICAL Please dote <br /> The LCS is a control sample of known,Interferent free matrix that is analyzed using the same reagents, <br /> meamb <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 MS/MSDs are advisory only <br /> arga and are not used to accept or reject batch results <br /> Project Manager/Sacramento Labors ory <br /> 6120105 UUU <3> <br />