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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95,301 rhane (209)384-2930 <br />' Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvirenmental inc Client Project ID Cal Fuels Sampled 10-07-04 <br /> of Northern California Reference Number 7440 Received 10-08-04 <br /> 8n, Shaw Road Sample Description Water Extracted 10-13-04 <br /> Brockton, CA 95215 Sample Prep/Analysis Method Ef 1 6030/8260 Analyzed 10-1301, <br /> Attn Tim Cuellar Lab Numbers 7440-16W 17W 18VV Reported 10-2D 04 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br />' ANALYTE REPOR FING SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT AW 1B AW 2A AW 26 <br />' 100704 100704 1D0704 <br /> (ti /L) ( !L) IL ( IL} <br /> FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 0 50 ND ND ND <br /> Di-isopropyl Ether (DIPS) 0 50 ND ND ND <br /> IEthyl tert-Butyl Ether (ETBE) 050 ND ND ND <br /> tert Amyl Methyl Ether(TAME) 0 50 ND ND ND <br />'• tert-Butanol(TBA) 20 ND ND ND <br />' VOLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1 2-DCA) 050 ND 12 2 7 <br />' Ethylene Dibromide (EDB) 0 50 ND ND ND <br /> Report Limit Multiplication Factor 1 1 1 <br /> I <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 993% 881% 887% <br /> Toluene-d8 969% 935% 952% <br />' Instrument ID HP 5972 MS <br /> Analytes reported as ND were not detected or below the Practical Quantltatton Limit <br /> Practical Quantitatton Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (ug1L)= micrograms per liter or parts per billion(ppb) <br /> APPROVED BY APPROVED BY <br /> I Clair J Cone Jam C P Alps <br /> Laboratory Mana r L oratory Director <br /> 1 <br />