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i CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384-2930 <br /> Certificate No 2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Rainwater Car Wash Sampled 11-11-02 <br /> of Northern California Reference Number 5220 Received 11-12-02 <br /> 837 Shaw Road Sample Description Water Extracted 11-15-02 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 11-15-02 <br /> Attn Tim Cuellar Lab Numbers 5220-6W, 7W 8W 9W, 10W Reported 11-26-02 <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 7E MW 7F MW 12A MW 12B MW 12C <br /> 111102 111102 119102 111102 111102 <br /> (pgIL) (ug/L) (ug/L) (r!9/L) (u9/L) (u9/L) — <br /> ' FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 28 21 17 21 11 <br /> ' Di-isopropyl Ether (DIPE) 050 ND ND ND ND ND <br /> Ethyl tert-Butyl Ether (ETBE) 050 ND NO NO ND NO <br /> tert-Amyl Methyl Ether(TAME) 050 ND ND ND ND ND <br /> tert-Butanol(TBA) 20 ND NO ND ND ND <br /> ' VOLATILE HALOCARSONS <br /> 1 2-Dichloroethane (1 2-DCA) 050 ND NO ND 056 ND <br /> ' Ethylene Dibromide (EDB) 050 ND ND ND ND ND <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> ' Surrogate Recoveries <br /> ti <br /> 1,2-Dichloroethane-d4 866% 925% 732% 975% 810% <br /> ' Toluene-i8 968% 993% 104% 102% 953% <br /> Instrument ID HP 5972 MS <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit E <br /> ' Practical Quantitation Limit W Reporting Limn x Report Limit Multiplication Factor <br /> (pg/L)= micrograms per liter or parts per billion(ppb) <br /> ' ANALYST APPROVED BY <br /> Clan J Cane JamelC Phrlhps <br /> La,46ratory Director <br />