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_ <br />Result <br />Page 7 of 16 <br />alscience <br />nvironmental <br />L ahoratories, Inc. <br />Analytical Report <br />Result <br />Cardno ERI <br />Date Received: <br />09/28/11 <br />601 North McDowell Blvd. <br />Work Order No: <br />11-09-1800 <br />Petaluma, CA 94954-2312 <br />Preparation: <br />EPA 5030C <br />0.50 <br />Method: <br />EPA 8260B <br />Toluene <br />Units: <br />ug/L <br />Project: ExxonMobil 99CAS/022789C <br />Ethyl -t -Butyl Ether (ETRE) <br />Page 2 of 2 <br />Lab Sample DatelTime Date Date/Time <br />Tient Sample Number Number Collected Matrix instrumenr Prepared Analyzed uu esarcn iu <br />Method Blank 099-12-884-701 N/A Aqueous GC/MS BB 09/29/11 09/29/11 110929L02 <br />14:33 <br />Parameter <br />Result <br />RL <br />DF Qual <br />Parameter <br />Result <br />RL <br />DF <br />Qua] <br />Benzene <br />ND <br />0.50 <br />1 U <br />Diisopropyl Ether (DIPE) <br />ND <br />0.50 <br />1 <br />u <br />Toluene <br />ND <br />0.50 <br />1 u <br />Ethyl -t -Butyl Ether (ETRE) <br />ND <br />050 <br />1 <br />u <br />Ethylbenzene <br />ND <br />0.50 <br />1 u <br />Tert-Amyl-Methyl Ether (TAME) <br />ND <br />0.50 <br />1 <br />u <br />Xylenes (total) <br />ND <br />0.50 <br />u <br />Ethanol <br />ND <br />50 <br />1 <br />u <br />Methyl -t -Butyl Ether (MTBE) <br />ND <br />0.50 <br />t u <br />1,2-Dibromoethane <br />ND <br />0.50 <br />1 <br />u <br />Tert-Butyl Alcohol (TBA) <br />ND <br />5.0 <br />1 u <br />1,2-Dichloroethane <br />ND <br />0.50 <br />1 <br />u <br />Surroaates: <br />RE ° <br />Control <br />Qual <br />Surrogates: <br />REC °° <br />Control <br />Qual <br />Limits <br />Limits <br />1,4-Bromofluorobenzene <br />93 <br />68-120 <br />Dibromofluoromethane <br />102 <br />80-127 <br />1,2-Dichloroethane-d4 <br />102 <br />80-128 <br />Toluene -d8 <br />97 <br />80-120 <br />RL -Reporting Limit DF - Dilution Factor Qual -Qualifiers <br />7440 Lincoln Way, Garden Grove, CA 92841-1427 • TEL:(714) 895-5494 • FAX: (714) 894-7501 <br />