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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 GeoEnvironmental, Inc Client Project ID Rainwater Car Wash Sampled 06-06-02 <br /> of Northern California Reference Number 4756 Received 06-07-02 <br /> 837 Shaw Road Sample Description Water Extracted 06-07-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 06-07-02 <br /> Attn Tim Cuellar Lab Numbers 4756-1W,2W,3W Reported 06-17-02 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE IA SAMPLE <br /> LIMIT Effluent GAC-2 Influent <br /> ' (pg/L) ((ug/L (ug/L u !L <br /> FUEL OXYGENATES <br /> ' Methyl tert-Butyl Ether(MTBE) 050 ND ND 13000 <br /> Di-isopropyl Ether (DIPE) 050 ND ND ND <br /> ' Ethyl tert-Butyl Ether (ETBE) 050 ND ND ND <br /> tert-Amyl Methyl Ether(TAME) 050 ND ND 200 <br /> '. tert-Butanol(TBA) 20 ND 830 ND <br /> ' VOLATILE HALOCARRONS <br /> 1 2-Dichloroethane (1 2-DCA) 050 ND ND ND <br /> ' Ethylene Dibromide (EDB) 050 ND ND ND <br /> Report Limit Multiplication Factor 1 1 20 <br /> ' Report Limit Multiplication Factor for MTBE 1000 <br /> I <br /> ' Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 974% 996% 963% <br /> Toluene-d8 955% 960% 994% <br /> Instrument ID Varian Saturn 3&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 /> (pg/L)= micrograms per liter or parts per billion(ppb) <br /> ANALYST APPROVED BY <br /> ' Clary J Cone I Jamrllips <br /> L oratory Director <br /> �I I I <br />