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CH ROMALAB, INC. t <br /> F Environmental Services(SDB) <br /> I <br /> April 16, 1998 Submission #: 9804155 <br /> i <br /> CONSTRUCTION TESTING & ENG. <br /> I <br /> r . <br /> Atten: Steve Teel <br /> r- <br /> r Project: CINTRA PARK, PHASE II roject#: 20-0445B <br /> u Received: April 9, 1998 <br /> re: Blank spike and duplicate report for Gasoline BTEX MTBE analysis . <br /> Method: SW846 8020A Nov 1990 / 8015Mod <br /> , <br /> Matrix: WATER <br /> Lab Run#: 12169 Analyzed: April 13 , 1998 <br /> Spike <br /> rSpike Amount Amount Found Spike Recov % <br /> e BSP Dup BSP Dup BSP Dup Control % RPD <br /> Analyte (ug/L u L Limits RPD Lim <br /> GASOLINE 500 500 427 433 85 . 4 86 . 6 75-125 1 .40 20 <br /> MTBE 100 100 124 122 124 122 75-125 1 . 63 20 <br /> BENZENE 100 100 110 120 110 120 77-123 8 . 70 20 <br /> TOLUENE 100 100 111 118 111 118 78-122 6 . 11 20 <br /> } ETHYL BENZENE 100 100 116 123 116 123 70-130 5 . 86 20 <br /> XYLENES 300 300 343 367 114 122 75-125 6 . 78 20 <br /> r <br /> F. <br /> r . <br /> �r <br /> Bs smpt #: 180514 1220 Quarry Lane•Pleasanton, California 94566-4756 <br /> BSD Smpl. #: 180515 (510) 484-1919• Facsimile ( 10) 484-1096 8012N MM 13AG54 <br /> Federal ID#68-01 0157 <br />