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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> 404 N Wiket lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical a19 Striker Avenue Suitc a Sacramento CA 95834 (916) 921 9600 fAX (916)921 010o <br /> Sherwood Labs Corporation Client Project ID VOGUE CLEANERS <br /> 8071 N Lander Ave <br /> Hilmar CA 95324 <br /> Attention Stephani Rossow OC Sample Group S806260 -03 04 05 -06 Reported Jul 2 1998 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Tetra <br /> Acetone MIRK hydrofuran 1 1 1 TCA TCE p Xylene <br /> Method 1!;Ot ISOL ISOL ISOL ISOL 15C)L <br /> Analyst T Tran T Tran T Tran T Tran T Tran T Tran <br /> Concentration <br /> Spiked 4 0 mg/L 1 0 mg/L 2 0 mg/L 1 0 mg/L t 0 mg/L 0 20 m91L <br /> LCS Batch# ISBLK062398 ISBLK062398 ISBLK062398 ISBLK062398 ISBLK062398 ISBLK062398 <br /> SPKA SPKA SPKA SPKA SPKA SPKA <br /> Date Prepared 06/23/98 06/23/98 06/23/98 06/23/98 06/23/98 06/23/98 <br /> Date Analyzed 06/23/98 06/23/98 06/23/98 06/23/98 06/23/98 06/23/98 <br /> Instrument I D # GCV-01 GCV-01 GCV 01 GCV-01 GCV 01 GCV 01 <br /> LCS % <br /> Recovery 80 94 95 100 100 105 <br /> Control Limits 70 130 70 1301. 70 130 70 130` 70 130", 70 1301 <br /> MS/MSD <br /> Batch ,# 9806528-05 9806528 05 9806528 05 9806528 05 9806528-05 9806528-05 <br /> Date Prepared 06/23/98 06/23/98 06/23/98 06/23/98 06/23/98 06/23/98 <br /> Date Analyzed 06/23/98 06/23/98 06/23/98 06/23/98 06/23/98 06/23/98 <br /> Instrument I D # GCV 01 GCV-01 GCV-01 GCV-01 GCv 01 GCV 01 <br /> Matrix Spike <br /> % Recovery 80 90 95 73 77 75 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 90 100 105 86 90 90 <br /> Relative % <br /> Difference 12 11 10 16 16 18 <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 preparation and analytical methods employed for the samples The LCS 1,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 /> �Y7lfj�� L�� rr`✓��r and are not used to accept or reject batch results <br /> Linda C Schneider L <br /> Project Manager/Sacramento Laboratory <br /> S806260 SLC <9> <br />