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' CASTLE ANALYTICAL LABORATORY <br /> Environmentai Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> Advanced GecEnvirorimental Inc Client Protect 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 5030/8260 Analyzed 07-01-04 <br /> Attn Tin Cuellar Lab Numbers 7092-11W 12W 13W, 14W 15W Reported 07-07-04 <br /> 1 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 Gii <br /> 1 <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 10E MW 10F 11 1A MW 118 111 C <br /> ' 052204 062204 062204 062204 062204 <br /> ( /L) (IJ lL) IL <br /> ' FUEL OXYGENATES <br /> Methyi tert-Butyl Ether(MTBE) 050 ND N❑ NO 22 46 <br /> Di-isopropyl Ether (DIPE) 050 ND ND NO ND ND <br /> Ethyl tert-Butyl Ether (ETRE) 050 NO ND NO ND ND <br /> ' tert-AmyE Methyl Ether(TAME) 050 ND ND NO ND ND <br /> tert-Butanol (Ti 20 ND ND NO ND ND <br /> ' VOLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1 2-DCA) 050 ND ND NO 052 17 <br /> ' Ethylene Dibromide (E❑B) 050 ND ND NO N❑ ND <br /> SOLVENTS <br /> ' Trichloroethene(TCE) 050 091 093 NO 055 11 <br /> Tetrachloroethene (PCE) 050 47 70 17 22 360 <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> Report Limit Multiplication Factor for PCE 20 <br /> ' Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 106% 110% 977% 976% 998% <br /> Toluene-d8 999% 108% 991% 101% 991% <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 /> micrograms per liter or er billion(ppb) <br /> ANALYST APPROVED BY <br /> ' Clan J Cone Ja es C Phillips <br /> 7 boratory Director <br /> � 1 <br />