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C- H- - INC. <br /> Environmental Services(5DB) <br /> i <br /> . March 23 , 1998 Submission #: 9803170 <br /> CONSTRUCTION TESTING & ENG. <br /> Atten: Steve Teel <br /> i <br /> I <br /> Project: CINTRA PARK roject#: 20-0445B <br /> Received: March 13 , 1998 <br /> re: Blank spike and duplicate report f or Gasoline BTEX MTBE analysis . <br /> Method: SW846 8020A Nov 1990 / 8015Mod <br /> Matrix: WATER <br /> Lab Run#: 11763 Analyzed: March 21, 1998 <br /> _ <br /> Spike <br /> Spike Amount Amount Found Spike Recov �S <br /> BSP Dup BSP Dup BSP Dup Control $ RPD <br /> Analyte (ug/L u L M Limits RPD Lim <br /> r. <br /> GASOLINE 500 500 450 502 90 .0 100 75-125 10 . 5 20 <br /> MTBE 100 100 98 . 9 79 . 9 98 . 9 79 . 9 75-125 21 . 2 20 <br /> BENZENE 100 100 94 . 1 83 . 2 94 .1 83 . 2 77-123 12 . 3 20 <br /> (" TOLUENE 100 100 101 89 . 2 101 89 . 2 78-122 12 . 4 20 <br /> ( ETHYL BENZENE 100 100 109 95 . 5 109 95 . 5 70-130 13 .2 20 <br /> XYLENES 300 300 292 260 97 .3 86 . 7 75-125 11. . 5 20 <br /> b . <br /> F + <br /> BS Smpt #: 176683 1220 Quarry Lane• Pleasanton, C lifornia 94566-4756 <br /> BSD Smpl #: 176684 (510) 484-1919 •Facsimile (f, 10) 484-1096 <br /> Federal ID#68-0140157 <br />