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Result RDL <br />Lab # Sample ID Compound Name (ug/kg) (ug/kg) <br />2833 1TWA 6 tert-butyl alcohol (TBA) <br />ND 100 <br />methyl tert-butyl ether (MTBE) <br />82 <br />5.0 <br />di -isopropyl ether (DIPE) <br />ND <br />5.0 <br />ethyl tert-butyl ether (ETBE) <br />ND <br />5.0 <br />tert-amyl methyl ether (TAME) <br />ND <br />5.0 <br />Surrogates (ug/kg) Result (ug/kg) % Recovery <br />Acceptance Range <br />(%) <br />dibromofluoromethane (81.2) 87.2 107 <br />70-130 <br />1,000 Q <br />Date Sampled: 01/05/99 Date Analyzed: 01/15/99 QC Batch #: 642 <br />Date Received: 01/06/99 Method: EPA 8260M <br />Holding Time Met: No <br />J A dilution was necessary due to the presence of significant amounts of weathered gasoline in the sample. <br />Date Sampled: 01/05/99 Date Analyzed: 01/15/99 QC Batch* 642 <br />Date Received: 01/06/99 Method: EPA 8260M <br />Holding Time Metes No <br />Page 11 of 21 <br />CA Lab Accreditation #: 2118 /1-2303 <br />Result <br />RDL <br />Lab # Sample ID <br />Compound Name <br />(ug/kg) <br />(ug/kg) <br />2834 2TW-15.5 <br />tert-butyl alcohol (TBA) <br />ND <br />20,0000 <br />methyl tert-butyl ether (MTBE) <br />ND <br />1,000 CD <br />di -isopropyl ether (DIPE) <br />ND <br />1,000 Q <br />ethyl tert-butyl ether (ETBE) <br />ND <br />1,000 0 <br />tert-amyl methyl ether (TAME) <br />ND <br />1,000 O <br />Surrogates (ug/kg) <br />Result (ug/kg) % Recovery <br />Acceptance Range (%) <br />dibromofluoromethane (50,000) <br />50,030 100 <br />70-130 <br />J A dilution was necessary due to the presence of significant amounts of weathered gasoline in the sample. <br />Date Sampled: 01/05/99 Date Analyzed: 01/15/99 QC Batch* 642 <br />Date Received: 01/06/99 Method: EPA 8260M <br />Holding Time Metes No <br />Page 11 of 21 <br />CA Lab Accreditation #: 2118 /1-2303 <br />