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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 Geo Enviro n mental, Inc Client Project ID Rainwater Car Wash Sampled See Below <br /> of Northern California Reference Number 5218 Received 11-12-02 <br /> 837 Shaw Road Sample Description Water Extracted 11-14-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 11-14-02 <br /> Attn Tim Cuellar Lab Numbers 5218-11W, 12W, 13W, 14W Reported 11-26-02 <br /> ' GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> ' LIMIT MW 9E Influent Effluent GAC-2 <br /> 11-10-02 11-11-02 11-11-02 11-11-02 <br /> (pg/L <br /> u /L) (ug/L (ug/L. u /L <br /> ' FU5L OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 NO 12000 NO 15 <br /> ' Di-isopropyl Ether (DIPS) 050 NO NO ND NO <br /> Ethyl tert-Butyl Ether (ETBE) 050 NO NO NO NO <br /> tert-Amyl Methyl Ether(TAME) 050 NO 170 ND NO <br /> ' tert-Butanol(TBA) 20 NO NO ND NO <br /> ' VOLATILE HALOCARBONS <br /> 1,2-Dichloroethane (1,2-DCA) 050 NO NO ND NO <br /> ' Ethylene Dibromide (EDB) 050 NO NO NO NO <br /> ' Report Limit Multiplication Factor 1 20" 1 1 <br /> Report Limit Multiplication Factor for MTBE 500 <br /> Date Sampled 11-10-02 11-11-02 11-11-02 11-11-02 <br /> "Report limit raised due to matrix interference <br /> 1 Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 884% 988% 890% 893% <br /> ' Toluene-d8 100% 967% 992% 953% <br /> Instrument ID HP 5972 MS <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> ' Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (pg/L)= micrograms per liter or parts per billion(ppb) <br /> ANALYST APPROVED BY <br /> ' Clan J Cone Ja s hrllips <br /> doratory Director <br />