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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> Analytical 1900 Bates Avenue Suite L Concord CA 94520 (510) 686-9600 FAX(510)686 9689 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> W++E viJnvw v4 v xi.,�.. . � r � x +4 <br /> Fugro�Vesf, Ina , <br /> 'Client project ID Shelf, 4315 Waterloo Rd , Stticktori, Ck <br /> 161050 Melody Lane, Ste 16o Matrix Sod <br /> Roseville, CA 95678 <br /> Attention Kurt Martin QC Sample Group 4120482-490 Reported Dec 16, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br />' Cadmium Chromium Lead Nickel Zinc Mercury <br /> Method: EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 7471 <br /> Analyst: D Ballard D Ballard D Ballard D Ballard D Ballard D Ballard <br /> Concentration <br /> Spiked: 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg 0 25 mg/Kg <br /> LCS Batch#: LCS121494 LCS121494 LCS121494 LCS121494 LCS121494 LCS121594 <br /> Date Prepared: 12/14/94 12/14/94 12/14/94 12/14/94 12/14/94 12/15/94 <br /> Date Analyzed 12/15/94 12/15/94 12/15194 12/15/94 12/15/94 12/15/94 <br />' Instrument I D #- P 40 P 40 P 40 P 40 P 40 SH 1000 <br /> LCS % <br /> Recovery- 95 95 95 94 92 91 <br /> Control Limits 81}120 80-120 80-120 80-120 80-120 80-120 <br /> 1 <br /> MS/MSD <br />' Batch #- 4120482 4120482 4120482 4120482 4120482 4120482 <br /> Date Prepared 12/14/94 12/14/94 12/14/94 12/14/94 12/14/94 12/15/94 <br /> Date Analyzed. 12/15/94 12/15/94 12/15/94 12/15/94 12/15/94 12/15/94 <br />' Instrument I D #' P 40 P 40 P 40 P 40 P 40 SH 1000 <br /> Matnx Spike <br />' % Recovery 94 85 89 78 93 93 <br /> Matrix Spike <br /> Duplicate % <br />' Recovery. 90 77 84 81 89 94 <br /> Relative% <br /> Difference. 43 99 58 38 44 1 1 <br /> Please Note <br /> The LCS is a control sample of known,Interferent free matrix that Is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL The <br /> 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 CC limits for MS/MSD's are advisory only <br /> /i and are not used to accept or reject batch results <br /> Linda C Schneider <br /> Project Manager 4120482 FUG a 16> <br />