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' Sequoia •680 Chesapeake Dnve Redwood City,CA 9406 041115) 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 Straker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> pgradlent Client project IC Apache Plastics <br /> 1017 26th St Matrix Air <br /> Sacramento, CA 95816 <br /> r Attention Vic Cherven OC Sample Group 608-1164 Reported Sep 3, 1996 <br /> k <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 B Williams B Williams B Williams B Williams <br /> Concentration <br /> Spiked 2 0 mg/m3 2 0 mg/m3 2 0 mg/m3 6 0 mg/m3 <br /> ' LCS Batch# LCS083096 LCS083096 LCS083096 LCS083096 <br /> ' Date Prepared 08/30/96 08/30/96 08/30/96 08/30/96 <br /> Date Analyzed 08/30/96 08/30/96 08/30/96 08/30/96 <br /> Instrument I D # GCHP-7 GCHP-7 GCHP-7 GCHP-7 <br /> LCS y <br /> Recovery 108 los 108 111 <br /> ' Control Limits 70-130 70-130 70-130 70-130 <br /> } <br /> ' MS/MSD <br /> Batch# BS083096 BS083096 BS083096 BS083096 <br /> ' Date Prepared 08/30/96 08/30/96 08/30/96 08/30/96 <br /> Date Analyzed 08/30/96 08/30/96 08/30/96 08/30/96 <br /> Instrument 1 D # GCHP-7 GCHP-7 GCHP-7 GCHP-7 <br /> ' Matrix Spike <br /> % Recovery 108 109 108 111 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 110 111 114 115 <br /> ' Relative % <br /> Difference 1 a 18 5 4 3 5 <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 QC limits for MS/MSD's are advisory only <br /> Margie ramba and are not used to accept or reject batch results <br /> Project Manager/Sacramento Laboratory <br /> 1 6081164 UPS <2> <br />