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1 <br />' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209)384-2930 <br />' <br /> Certificate#2079 <br /> Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Cal Fuels Sampled 6-20-01 <br />' of Northern California Reference Number 3849 Received 6-22-01 <br /> 837 Shaw Road Sample Description Water Extracted 6-28-01 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 6-28-01 <br /> Attn Tim Cuellar Lab Numbers 3849-1W,2W, 3W,4W, 5W Reported 7-5-01 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GUMS <br />' ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW1 MW3 MW4 MW5 MW6 <br />' 062001 062001 062001 062001 062001 <br /> IL (pg/L) (pgIL) IL 1L IL <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 050 ND ND ND 14 ND <br /> Di-isopropyl Ether (RIPE) 0 50 ND ND ND 0115 ND <br /> Ethyl tert-Butyl Ether (ETBE) 050 ND ND ND ND ND <br /> tert-Amyl Methyl Ether(TAME) 050 ND ND ND ND NO <br /> rtent-Butanol(TBA) 20 ND ND ND ND ND <br />' VOLATILE HALOCARBONS <br /> 1,2-ā¯‘rchloroethane (1,2-DCA) 050 ND 20 15 37 ND <br />' Ethylene Dibromide (EDB) 050 ND ND ND ND ND <br />' Report Limit Multiplication Factor 1 20 20 1 1 <br /> Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 103% 803% 877% 109% 886% <br /> Toluene-d8 108% 962% 837% 102% 108% <br /> Instrument ID HP 5972MS <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 /> (pglL)= microgram per liter or parts illion (ppb) <br />' ANALYST APPROVED BY <br /> Clan J Cone J es Phillips <br /> laboratory Director <br /> 1 <br />