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CASTLE ANALYTICAL LABORATORY <br /> ' Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Rainwater Car Wash Sampled 06-22-04 <br /> ' of Northern California Reference Number 7092 Received 06-24-04 <br /> 837 Shaw Road Sample Description Water Extracted 07-01-04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018260 Analyzed 07-01-04 <br /> Attn Tim Cuellar Lab Numbers 7092-6W,7W SW 9W 10W Reported 07-07-04 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GUMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 12F MW 10A MW 10B MW 10C MW 10D <br /> 062204 062204 062204 062204 062204 <br /> (p 1L) ({1 /L) IL ( 1L) (pg/L) ( /L) <br /> ' FUEL OXYGENATES <br /> I <br /> Methyl tert-Butyl Ether(MTBE) 050 ND ND NO ND ND <br /> t Di-isopropyl Ether (D1PE) 050 ND ND ND ND ND <br /> Fthyl tert-Butyl Ether (ETRE) 050 NO ND ND ND ND <br /> ' tert-Amyl Methyl Ether(TAME) 050 NO ND ND ND ND <br /> tert-Butanol (TBA) 20 NO ND ND NO ND <br /> VOLATILE HALOCARBONS <br /> 1 2 Dichloroethane (1,2-DCA) 050 NO ND 10 ND NO <br /> ' Ethylene Dibromide (EDB) 050 NO ND ND ND NO <br /> SOLVENTS <br /> ' Tnchloroethene(TGE) 050 ND 25 220 23 29 <br /> Tetrachloroethene(PCE) 050 54 68 970 630 230 <br /> tReport Limit Multiplication Factor 1 1 10' 10* 1 <br /> Report Limit Multiplication Factor for PCE 100 50 10 <br /> t "Report Irmrt raised due to matrix interference <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 893% 925% 886% 840% 91 6% <br /> Toluene-d8 101% 959% 990% 960% 967% <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 Multiplications Factor <br /> ' (pgIL)= micrograms per liter oav�' <br /> ppb) <br /> 6' ANALYST APPROVED BY <br /> Glary J Cone J es C Phrllvps <br /> aboratoty Director <br />