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i <br /> iCASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209)384-2930 <br />' Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnviron mental, Inc Client Project ID Cal Fuels(Pacific) Sampled 03-08-02 <br /> of Northern California Reference Number 4487 Received 03-12-02 <br /> 837 Shaw Road Sample Description Water Extracted 03-15-02 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 5030/8280 Analyzed 03-15-02 <br /> Attn Tim Cuellar Lab Numbers 4487-11W, 12W 13W, 14W, 15W Reported 03-22-02 <br /> GASOLINE ADDITIVES BY EPA METHOD 8280 GCIMS <br />' ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 11 MW 12 MW 13 AW 1A AW 113 <br />' 030802 030802 030802 030802 030802 <br /> (pg/L) (ug/L) (ug/L) (ug/L) (ug/L) —_ (ug/L) <br /> FUEL OXy GENATES <br />' Methyl tert-Butyl Ether(MTBE) 050 050 NO ND NO NO <br /> Di-isopropyl Ether (DIPE) 050 NO NO NO NO NO <br />' Ethyl tert-Butyl Ether (ETRE) 050 NO NO ND ND NO <br /> tert-Amyl Methyl Ether(TAME) 0 50 NO ND ND ND NO <br /> tert-Butanol(TBA) 20 NO NO ND ND NO <br /> Report Limit Multiplication Factor 1 1 1 20' 20' <br /> I <br /> 1 <br /> 'Dilution required due to matnx interference <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 968% 884% 926% 936% 101% <br /> Toluene-d8 885% 970% 107% 110% 895% <br /> I Instrument 10 Varian Saturn 3 <br /> Analytes reported as NO were not detected or below the Practical Quantrtation Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (lag/L)= micrograms per liter or parts er billion(ppb) <br /> ANALYST APPROVED BY 01A, ZO <br /> Clair J Cane Japfehunps <br /> aboratory Drrector <br />