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CHROMALAB, INC. <br /> Environments!Services(SDB) <br />' May 28 , 1998 Submission ##: 9805267 <br />' ERM-WEST WALNUT CREEK <br /> Atten. James Ackerman. <br />' Prosect. UP-STOCKTON Pro3ect#: 8187 . 25 <br /> Received: May 18 , 1998 <br />' re - Blank spike and duplicate report for Gasoline BTEX analysis . <br /> Method SW846 8020A Nov 1990 / 8015Mod <br />' Matrix. WATER <br /> Lab Run#: 12882 Analyzed: May 22 , 1998 <br />' Spike <br /> Spike Amount Amount Found Spike Recov <br /> BSP Dup BSP Dup BSP Dup Control % RPD <br /> Anal to u L ug/L)( % Limits RPD Lim <br /> GASOLINE 500 500 459 450 91 . 8 90 0 75-125 1 98 20 <br /> BENZENE 100 100 93 5 97 1 93 5 97 . 1 77-123 3 . 78 20 <br /> TOLUENE 100 100 92 9 97 . 2 92 . 9 97 . 2 78-122 4 52 20 <br /> ETHYL BENZENE 100 100 103 108 103 108 70-130 4 . 74 20 <br /> XYLENES 300 300 294 313 98 . 0 104 75-125 5 94 20 <br /> r <br /> i <br /> BS Smpl # 187127 <br /> BSD Smpl # 187128 1220 QuarryLane �Ev2 <br /> Pleasanton, California 94566-4756 <br /> (925) 484-1919 • Facsimile (925) 484-1096 <br /> Federal ID #68-0140157 <br />