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r Sequoia 680 Chesapeake Drive Redwood City CA 94063 t650) 364 9600 FAX(650)364 4233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (510) 988 9600 FAX(5 10) 988 9673 <br /> I,�► Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Sherwood Labs Corporation Client Project ID VOGUE CLEANERS <br /> 8071 N Lander Ave <br /> Hilmar CA 9532 <br /> Attention Stephani Rossow OC Sample Group S806260 00 01 {12 Reported �[ul 2 1998 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Tetra <br /> Acetone MIRK hydrofuran 1 1 1 TCA TGE p Xylene <br /> Method ISOL [SOL )SOL ISOL [SOL )SOL <br /> Analyst T Tran T Tran T Tran T Tran T Tran T Tran <br /> Concentration <br /> Spiked 4 0 mg/L 1 0 rng/L 2 0 mg/L 1 0 mg/L 1 0 mg/L 0 20 mg/L <br /> LCS Batch# ISBLK062298 ISBLK062298 ISBLK062298 ISBLK062298 ISBLK062298 ISBLK062298 <br /> SPKA SPKA SPKA SPKA SPKA SPKA <br /> Date Prepared 0622,98 06/22/98 06/22198 06'22/98 06/22/98 06/22/98 <br /> Date Analyzed 06;22/98 06/22/98 06'2298 06'22198 0622;98 06/22/98 <br /> Instrument I D # GCV o1 GCV 01 GCV 01 GCV 01 GCV 01 GCV 01 <br /> LCS % <br /> Recovery 88 97 100 92 93 90 <br /> Control Limits 70 13004 701300. 70-130 70 130'. 70130.. 70130% <br /> MS/MSD <br /> Batch # 9806528 05 9806528 05 9806528 05 9806528 05 9806528-05 9806528-05 <br /> Date Prepared 06/22/98 06/22/98 06/22/98 06/22/98 06/22/98 06/22/98 <br /> Date Analyzed 06/22/98 06/22/98 06/22/98 06/22/98 06/22/98 06/22/98 <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 9R 90 <br /> Relative <br /> Difference 12 11 10 16 16 18 <br /> ease ote <br /> The LCS.1s a control sample of known interferent free matrix that is analyzed using the same reagents <br /> SEUOIA ANALYTICAL 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 OC limits for MS/MSD's are advisory only <br /> and are not used to acce t or reject batch results <br /> Linda C Schneider <br /> Project Manager/Sacramento Laboratory <br /> s806260 sic 8 <br />