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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 Project ID Rainwater Car Wash Sampled 08-05-02 <br /> of Northern California Reference Number 4951 Received 08-07-02 <br /> 837 Shaw Road , Sample Description Water Extracted 08-12-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 08-12-02 <br /> Attn Tim Cuellar Lab Numbers 4951-1 W,2W, 3W Reported 08-21-02 <br /> 1 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT Influent GAC-2 Effluent <br /> (ug/L) (ug1L) (ug/L) (ug/L) _ - -- <br /> FUEL OXYGE=NATES <br /> ' Methyl tert-Butyl Ether(MTBE) 050 8200 ND NO <br /> Di-isopropyl Ether (DIPE) 050 ND ND NO <br /> ' Ethyl tert-Butyl Ether (ETBE) 050 ND ND NO <br /> tert-Amyl Methyl Ether(TAME) 050 170 ND NO <br /> ' tert-Butanol(TBA) 20 NO 450 340 <br /> VOLATILE HALOCARBONS <br /> ' 1 2-Dichloroethane (1,2-DCA) 050 NO NO NO <br /> ' Ethylene Dibromide (EDB) 050 NO ND NO <br /> Trichloroethene(TCE) 050 ND NO NO <br /> ' Tetrachloroethene(PCE) 050 33 NO NO <br /> Report Limit Multiplication Factor 50 1 1 <br /> ' Report Limit Multiplication Factor 1000 <br /> ' Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 101% 131% 116% <br /> Toluene-d8 98 6% 953% 949% <br /> 1 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 /> (pg/L)= micrograms per liter or parts per billion(ppb) <br /> . ANALYST APPROVED BY C/ <br /> C16117 J Cone Jam Phillips <br /> !a ratary Duector <br /> I <br />