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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 GeoEnviron 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 5218-6W,7W, 8W,9W, 10W Reported 11-26-02 <br /> i 1IL <br /> i ' GASOLINE ADDITIVES BY EPA METHOD 8260 GUMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> ' LIMIT MW 6 MW 9A MW 913 MW 9C MW 9D <br /> 11-11-02 11-10-02 11-10-02 11-10-02 11-10-02 <br /> -- (Pq/L) (uglL) (uglL) (ug1L) (ug/L) ...,._ (uglL) <br /> ' FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 40000 15 16 ND ND <br /> ' Di-isopropyl Ether (RIPE) 050 ND ND ND ND ND <br /> Ethyl tert-Butyl Ether (ETBE) 050 ND ND ND ND ND <br /> ' tert-Amyl Methyl Ether(TAME) 050 760 ND ND ND ND <br /> tert-Butanol(TBA) 20 ND ND ND ND ND <br /> ' VOLATILE HALOCARBONS <br /> 1,2-Dichloroethane (1 2-DCA) 050 ND ND ND ND ND <br /> ' Ethylene Dibromide (EDB) 050 ND ND ND ND ND <br /> I <br /> ' Report Limit Multiplication Factor 100` 1 1 1 1 <br /> Report Limit Multiplication Factor for MTBE 1000 <br /> Date Sampled 11-11-02 11-10-02 11-10-02 11-10-02 11-10-02 <br /> "Report limit raised due to matrix interference <br /> ' Surrogate Recoveries <br /> 1 2-Dichkoroethane-d4 969% 895% 972% 858% 863% <br /> ' Toluene-d8 960% 109% 101% 100% 968% <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 /> (Ng/L)= micrograms per liter or parts per billion(ppb) <br /> ' ANALYST 1 APPROVED BY <br /> Clan J Cone Ja /flips <br /> ' I <br /> oratory Director <br />