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' Sequoia 6B0 Chesapeake Drive Redwood City,CA 94063 (415) 364-%00 FAX(415) 364-9233 <br /> 404 N eget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite B Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 4�- tipgr'ad6nt Environmental Tient pro ext ILS A ache PlasticsP <br /> ' P 0 Box 8002 Matrix Air <br /> Stockton, CA 95208 <br /> n Attention Vic Cherven QC Sample Group 7060537-0540 Reported Jun 27, 1997, <br /> QUALITY CONTROL DATA REPORT <br /> ' <br /> ANALYTE Ethyl <br /> ' Benzene Toluene Benzene X lanes <br /> Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> ' Analyst M Chiaravalloti M Chiaravalloti M Chiaravallot M Chiaravalloti <br /> Concentration <br /> Spiked 2 0 mg/m3 2 0 mg/m3 2 0 mg/m3 6 0 mg/m3 <br /> ' LCS Batch#' LCS061897 LCS061B97 LCS061897 LCS061897 <br /> Date Prepared 06/18/97 06/18/97 06/18/97 06/18/97 <br /> ' Date Analyzed: 06/18/97 06/18/97 06/18/97 06/18/97 <br /> Instrument I D #. GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> LCS% <br /> Recovery 110 104 103 102 <br /> Control Limits 70-130 70-130 70 130 70 130 <br /> MS/MSD <br /> ' Batch#: BS061897 135061897 BS061897 BS061897 <br /> Date Prepared 06/18/97 06/18/97 06/18/,97 06/18/97 <br /> Date Analyzed: 06/18/97 06/18/97 06/18/97 06/18/97 <br /> ' Instrument LD # GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spice <br /> ' %Recovery- 110 104 103 102 <br /> Matrix Spike <br /> ' Duplicate% <br /> Recovery: 108 102 102 100 <br /> Relative% <br /> Difference. 18 19 098 20 <br /> SE UOIA 7;L <br /> CAL ease Note <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 /> f7 cam / validation of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> Edana M Fruciano J v' and are not used to accept or reject batch results <br /> Project Manager/Sacramento Labora ory <br /> 7060537 uuu X37 <br />