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Sequoia <br />Date Prepared <br />615100 <br />S 19 Striker Avenue Suite 8 <br />Sacramento CA 99934 <br />Extraction Method EPA 5030B <br />[PIT] <br />Blank <br />(91 fit 921-%W <br />Analytical <br />www (916)921-0100 <br />www sequoialabs cpm <br />Tert-butyl alcohol <br />6/5100 <br />1 <br />Gettler-Ryan - Dublin <br />Project Chevron 9-5775, Lodi, CA <br />Sampled <br />5/25/00 <br />6747 Sierra Court, Ste J <br />Project Number 346408 85 <br />Received <br />5/26/U0 <br />Dublin, CA 94568 <br />Project Manager Deanna L Hardin <br />Reported <br />6/12100 <br />Volatile Oxygenate Compounds by EPA Method 8260A/Quality Control <br />Di -isopropyl ether <br />Sequoia Analytical - Sacramento <br />ND <br />Date <br />Spike Sample QC <br />Reporting Limit Recov <br />RPD RPD <br />Analyte Analyzed Level Result Result [hits <br />Recov Limits % <br />Limit % Notes* <br />Batch 0050274 <br />Date Prepared <br />615100 <br />Extraction Method EPA 5030B <br />[PIT] <br />Blank <br />0050274-BLKI <br />Tert-butyl alcohol <br />6/5100 <br />ND <br />ug/l <br />200 <br />Methyl tert-butyl ether <br />ND <br />200 <br />Di -isopropyl ether <br />ND <br />200 <br />Ethyl tert-butyl ether <br />ND <br />200 <br />Tert-amyl methyl ether <br />ND <br />h <br />200 <br />Ethanol <br />ND <br />3000 <br />Surrogate 1,2 -DCA -d4 <br />500 <br />518 <br />600-140 <br />104 <br />LCS <br />0050274-BS1 <br />Methyl tert-butyl ether <br />615100 <br />500 <br />500 <br />ug/l <br />700-130 <br />100 <br />Surrogate 1,2-DCA44 <br />500 <br />532 <br />600-140 <br />106 <br />LCS Duo <br />0050274-BSDI <br />Methyl tert-butyl ether <br />615/00 <br />500 <br />524 <br />ug/I <br />700-130 <br />105 <br />250 488 <br />Surrogate 1,2-DC4-d4 <br />T or <br />Soo <br />550 <br />600-140 <br />110 <br />Matrix Spike <br />0050274 -MSI <br />S005402-02 <br />Methyl tert-butyl ether <br />615/00 <br />500 ND <br />506 <br />ug/I <br />600-140 <br />101 <br />Surrogate 1,2 -DCA -d4 <br />" <br />500 <br />540 <br />600-140 <br />108 <br />Matrix Spike Dug <br />0050274-MSDI S005402-02 <br />Meth tort -butyl ether <br />6/5/00 <br />500 ND <br />53 2 <br />ug/I <br />600-140 <br />106 <br />250 483 <br />Surrogate 1,2 -DCA -d4 <br />0 <br />500 <br />558 <br />" <br />600-140 <br />112 <br />Batch 0060002 <br />Date Prepared <br />6/1100 <br />Extraction Method EPA 5030B <br />(PITS <br />Blank <br />0060002-BLKI <br />Tert-butyl alcohol <br />6/1100 <br />ND <br />ug/1 <br />200 <br />Methyl tert-butyl ether <br />" <br />ND <br />200 <br />Di -isopropyl ether <br />ND <br />2 00 <br />Ethyl tort -butyl ether <br />" <br />ND <br />200 <br />Tert-amyl methyl ether <br />" <br />ND <br />200 <br />Edmol <br />" <br />ND <br />3000 <br />Surrogate 1,2-DC4-d4 <br />500 <br />588 <br />600-140 <br />118 <br />I.CS <br />0060002 -BS 1 <br />Methyl tert-butyl ether <br />6/1/00 <br />500 <br />52 8 <br />ug/I <br />700-130 <br />106 <br />Surrogate 1,2 -DCA -d4 <br />500 <br />598 <br />600-140 <br />120 <br />LCS Dun <br />Methyl tert-butyl ether <br />0060002-BSDI <br />611/00 <br />500 <br />516 <br />119/1 <br />700-130 <br />103 <br />25 0 287 <br />Sequoia Analytical - Sacramento <br />*Refer to end of reportfor text of notes and definitions <br />Page 8 of I0 <br />