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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 Envuonmental, Inc Client Project ID Rainwater Car Wash Sampled See Below <br /> of Northern California Reference Number 5220 Received See Below <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 5220-21W, 22W 23W,24W,25W Reported 11-26-02 <br /> ' GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> ' LIMIT MW 13B MW 13C MW 13D MW 13E MW 8A <br /> 111102 111102 111102 111102 111202 <br /> ( ]L) (u IL) (u !L ug/L)( (ug/L u IL <br /> FUEL OXYGENATES <br /> ' Methyl tert-Butyl Ether(MTBE) 0 50 076 ND ND ND 23 <br /> ' D!-isopropyl Ether (DIPE) 0 50 NO NO ND NO NO <br /> Ethyl tert-Butyl Ether (ETBE) 0 50 NO NO NO NO NO <br /> ' tert-Amyl Methyl Ether(TAME) 0 50 NO ND ND NO ND <br /> tert-Butanol (TBA) 20 NO NO ND NO NO <br /> ' VOLATILE HAL CARE N <br /> 1,2-Dichloroethane (1 2-DCA) 050 ND NO NO NO NO <br /> ' Ethylene Dibromide (EDB) 0 50 ND NO ND NO NO <br /> ' Report Limit Multiplication Factor 1 1 1 1 1 <br /> Date Sampled 11-11-02 11-11-02 11-11-02 11-11-02 11-12-02 <br /> Date Received 11-12-02 11-12-02 11-12-02 11-12-02 11-13-02 <br /> ' Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 689% 760% 701% 739% 657% <br /> ' Toluene-d8 108% 107% 960% 109% 101% <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 /> 0ANALYST ✓`C APPROVED BY / <br /> ' Clan Cone Ja a Phillips <br /> boratory Director <br />