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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 GeoEnviron mental, Inc Client Project ID Pacific Car Wash Sampled 12-31-01 <br />' of Northern California Reference Number 4327 Received 01-03-02 <br /> 837 Shaw Road Sample Description Water Extracted 01-10-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 01-10-02 <br /> Attn Tim Cuellar Lab Numbers 4327-6W,7W, 8W, 9W, 10W Reported 01-14-02 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 6 MW 7 MW 8 MW 9 MW 10A <br />' 123101 123101 123101 123101 123101 <br /> (jig/L) (ug/L (Ug/L (ug/L (ug/L u IL <br /> F E OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 050 2400 1200 87 22 150 <br />' Di-isopropyl Ether (DIPE) 050 ND NO ND NO ND <br /> Ethyl tert-Butyl Ether (ETRE) 050 ND ND NO NO ND <br /> tert-Amyl Methyl Ether(TAME) 0 50 ND 68 NO NO 13 <br />' tort-Butanol (TBA) 20 ND ND NO NO ND <br /> VOLATILE HALOCARBONS <br /> 1,2-Dichloroethane (1,2-DCA) 050 ND 44 072 12 21 <br /> Ethylene Dibromide (EDB) 050 ND NO NO ND ND <br /> Report Limit Multiplication Factor 100 5 1 1 1 <br /> Report Limit Multiplication Factor MTBE only 50 10 <br /> Suiruyate Recovene5 <br /> 1,2-Dichloroethane-d4 111% 124% 115% 109% 107% <br /> Toluene-d8 108% 104% 104% 103% 108% <br /> Instrument ID HP 5972MS <br /> Analytes reported as NO 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 partbillion(ppb) <br /> ANALYST APPROVED BY <br /> Clan J Cone Ja s hr cps <br /> aboratory Director <br />