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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209)384-2930 <br /> t <br /> Certificate No 2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Cal-Fuels Sampled 12-30-02 <br />' of Northern California Reference Number 5354 Received 12-31-02 <br /> 837 Shaw Road Sample Description Water Extracted 01-02-03 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 01-02-03 <br /> Attn Tim Cuellar Lab Numbers 5354-1W,2W, 3W,4W, 5W Reported 01-06-03 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE 1D SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW-4 MW-5 MW-7 MW-8 MW-9 <br /> 12-30-02 12-30-02 12-30-02 12-30-02 12-30-02 <br /> (ug/L (u /L) (ug/L u IL <br /> FUEL X ENATES <br /> iMethyl tert-Butyl Ether(MTBE) 050 ND 099 ND ND NO <br />' Di-isopropyl Ether (PIPE) 050 ND NO NO ND NO <br /> Ethyl Cert-Butyl Ether (ETBE) 050 NO ND ND ND NO <br />' tert-Amyl Methyf Ether(TAME) 050 NO ND NO ND ND <br /> tert-Butanol(TBA) 20 ND NO ND NO ND <br />' VOLATILE HALOCARSONS <br /> 1,2-Dichloroethane (1 2-DCA) 050 NO 095 NO ND ND <br />' Ethylene Dibromide (EDB) 050 NO NO ND NO NO <br /> IReport Limit Multiplication Factor 10* 1 1 1 1 <br /> Report limit raised due to matrix interference <br /> S11rrn0afP Rarninrnc <br /> 1 2-Dichloroethane-d4 971% 105% 966% 990% 874% <br /> Toluene-d8 981% 981% 102% 104% 100% <br /> Instrument ID Varian Saturn 3 MS&HP 5972 MS <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (pg/L)= micrograms per liter orrt per billion (ppb) <br /> r <br /> ANALYST APPROVED BY (7/ <br /> Clan J Cone Jame I <br /> La ratory Director <br /> I <br />