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' Sequoia 680 Chesapeake Drive Rcdwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> -Y q 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> $19 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> �W Analytical <br /> Pacific Environmental Group Client Project Ib 920 i22 1A/Chevron 9-9840 <br /> 11315 Sunrise Gold Circle, Ste M Matrix Soil <br /> Rancho Cordova, CA 95742 <br /> Attention Tim Anenson QC Sample Group 8030071-0073, 0077 Reported Mar 11, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Cadmium Chromium Lead Nickel ?ane PCS 1260 TRPH <br /> Method EPA 601 OA EPA 6010A EPA 601 OA EPA 6010A EPA 601 OA EPA 8080 SM 5520CF <br /> Analyst S Phillips S Phillips S Phillips S Phillips S Phillips LMB LM <br /> Concentration <br /> Spiked 50 mg/kg 50 mg/kg 50 mg/kg 50 mg/kg 5D mg/kg 125,ug/kg 100 mg/kg <br /> LCS Batch# LCS030498 LCS030498 LCS030498 LCS030498 LCS030498 LCS030498 LCS030498 <br /> Date Prepared 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 <br /> Date Analyzed 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 <br /> Instrument I D # ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 GCHP-4B IR-1 <br /> LCS <br /> Recovery 94 96 94 97 96 102 81 <br /> Control Limits 80-120% 80-120% 80-120% 80-120% 80-120% 40-140% 70-130% <br /> MS/MSD <br /> Batch# 7030073 7030073 7030073 7030073 7030073 8020774 8020187 <br /> Date Prepared 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 <br /> Date Analyzed 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 03/04/98 <br /> Instrument I D # ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 GCHP-413 !R-1 <br /> Matrix Spike <br /> Recovery 80 78 81 90 80 57 " <br /> Matrix Spike <br /> Duplicate <br /> Recovery 82 78 85 76 74 74 " <br /> Relative <br /> Difference 25 00 48 <br /> 17 7 8 26 <br /> Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents, <br /> SEa OIA ANALY CAL 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 /> and are not used to accept or reject batch results <br /> Inds C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 8030071 PES <24> <br />