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1 <br /> 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 Protect ID Rainwater Car Wash Sampled 11-12-02 <br /> ' of Northern California Reference Number 5220 Received 11-13-02 <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 5220-31W, 32W,33W,34W Reported 11-26-02 <br /> ' GASOLINE ADDITIVES BY EPA METHOD 8260 GUMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 11A MW 11 B MW 11 C MW 11 D <br /> 111202 111202 111202 111202 <br /> �pq/Lug/L) (u /L (ug/L u /L <br /> FUEL OXYGENATES <br /> ' Methyl tert-Butyl Ether(MTBE) 050 68 14 11 NO <br /> ' Di-isopropyl Ether (DIPE) 0 50 ND ND ND NO <br /> Ethyl tert-Butyl Ether (ETBE) 0 50 ND NO ND ND <br /> ' tert-Amyl Methyl Ether(TAME) 0 50 NO NO ND NO <br /> tert-Butanol(TBA) 20 ND ND ND NO <br /> VOLATILE HALOCARBONS <br /> 1,2-Dichloroethane (1 2-DCA) 050 1 0 NO ND NO <br /> tEthylene Dibrcmide (EDS) 050 NO ND NO ND <br /> ' Report Limit Multiplication Factor 1 1 1 1 <br /> Surrogate Recovenes <br /> 1,2-Dichloroethane-d4 982% 968% 892% 951% <br /> ' Toluene-d8 102% 101% 102% 996% <br /> Instrument ID 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 /> (ug/L)= micrograms per liter or parts per billion(ppb) f� <br /> ANALYST APPROVED B5ja <br /> Clan J ne Phillipsratory Director <br />