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i <br />' CASTLE ANALYTICAL LABORATORY <br /> S Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209)384-2930 <br /> ICertificate#2480 Fax (209)3841507 <br /> Advanced GeoEnvironmentat Inc Client Protect 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 5030/8260 Analyzed 03-15-02 <br /> Attn Tim Cuellar Lab Numbers 4487-6W,7W,8W, 9W, 10W Reported 03-22-02 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 6 MW 7 MW$ MW 9 MW 10 <br /> 030802 030802 030802 030802 030802 <br /> (ug/L) (u9/!-) (ug/L) (uq/L) (ug/L) (ug/L) <br /> FVEL, MGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 NO NO ND NO NO <br /> Di-isopropyl Ether (DIPE) 0 50 NO NO ND NO NO <br /> Ethyl tert-Butyl Ether (ETRE) 0 50 NO NO ND NO ND <br /> tert-Amyl Methyl Ether(TAME) 0 50 ND ND ND NO ND <br /> tert-Butanol(TBA) 20 ND ND ND NO ND <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> i <br /> Surrogate Recoveries <br /> 1,Z-Dichloroethane-d4 88 3% 87 1% 922% 950% 86 9% <br /> Toluene-d8 992% 983% 100% 100% 955% <br /> I Instrument ID Varian Saturn 3 <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 /> (Ng/l-)= micrograms per liter or parts per billion(ppb) <br /> J. <br /> , ANALYST 7 APPROVED BY r <br /> Clan J ConeJ es hillips <br /> aboratary Director <br /> I <br />