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1 <br />' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater CA 95301 Phone (2d9)38 <br /> Certificate#2480 <br /> Fax (209)38 <br /> Advanced GeoEnvironmental Inc Client Project ID Pacific Carwash Sampled 06-01-0,e <br /> of Northern California Reference Number 7014 Received 06-03-0e <br /> 837 Shaw Road Sample Description Water Extracted 06-10-0e <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 06-10-0z <br /> Attn Tim Cuellar Lab Numbers 7014-21W 22W 23W 24W Reported 06-11-0� <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br />' ANALYTE REPORTING SAMPLE ID <br /> SAMPLE ID SAMPLE 1D SAMPLE ID <br /> LIMIT MW 18E MW 19A MW 19B MW 19C <br /> t <br /> (N 060104 060104 060104 060104 <br /> /L} ( /L) (pg/L) ( /L) (fi 1L) <br /> FUEL OXYGENATES <br /> Methyl tort-Butyl Ether(MTBE) 050 ND 28 ND ND <br /> Di-isopropyl Ether (DIPE) 050 ND ND ND ND <br /> Ethyl tert-Butyl Ether (ETRE) 050 ND ND ND ND <br /> tert-Amyl Methyl Ether(TAME) 050 ND ND ND ND <br /> lie tert-Butanol(TBA) 20 ND ND ND ND <br />' VOLATILE HALOCARBONS <br /> 1 2-Dichioroethane (1,2-DCA) 050 ND 21 ND ND <br /> IEthylene Dibromide (EDB) 050 ND ND ND ND <br /> Report Limit Multiplication Factor 1 1 1 1 <br /> I <br /> Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 963% 99 30,; 110% 10^u ib <br /> Toluene-d8 $9 8% 86 8% 991% 99 9% <br /> Instrument ID HP 5972 M5 <br /> Analytes reported as ND were not detected or below the Practicaf Quantitation Limit <br /> Practical Quantitation Limit= Reporting Limit x Report Limit Multiplication Factor <br /> (pg1L)= microgra er literZpa pe billion (ppb) <br /> ANALYST APPROVED BY <br /> Clara J Cone Jam r!lrps <br /> L oratory Director <br />