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CASTLE ANALYTICAL <br /> LABORATORY <br /> Environmental Testing Services 2333 Shuttle Dfive, 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 06-23-04 <br /> of Northern CaVomia Reference Number 7093 Received 06-24-04 <br /> 837 Shaw Road Sample Description Water Extracted 07-02-04 <br /> Stockton, CA 95215 Sample PreplAnaiysis Method EPA 5030/8260 Analyzed 07-02-04 <br /> Attn Tim Cuellar Lab Numbers 7093-11W 12VV 13W 14W 15W Reported 07-07-04 <br /> ' GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br /> ANALYTE REPORTING SAMPLE iD SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> ' UMIT MW 4 MW 8A MW 8B MW 8C MW 8D <br /> 062304 062304 062304 062304 062304 <br /> (p91L) ( /L) ( 1L) (p lL) (pr IL) IL) <br /> FUEL OXYGENATES <br /> Methy!Cert-Butyl Ether(MTBE) 0 50 ND 4 0 1 6 22 ND <br /> ' Di-isopropyl Ether (DIPE) 0 50 ND ND ND NO ND <br /> Ethyl tert-Butyl Ether (ETBE) 0 50 ND ND ND NO ND <br /> ' tert-Amyl Methyl Ether(TAME) 050 ND ND NO ND ND <br /> tert-Butanol (TBA) 20 ND ND NO NO ND <br /> VOLATILE HALOCARBONS <br /> 1 2-DichEoroethane (1 2-DCA) 0 50 ND ND 64 4 3 1 2 <br /> Ethylene Dibromide (EDS) 0 50 ND NO NO NO NO <br /> SOLVENTS <br /> ' Trichloroethene(TCE) 050 12 ND 24 15 61 <br /> TetracNoroethene (PCE) 050 1100 61 1100 1000 730 <br /> ' Report Limit Multiplication Factor 5` 2* 2- 2* 2- <br /> Report Limit Multiplication Factor for PCE 50 20 20 20 <br /> ' "Report limit raised due to matrix interference <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 989% 102% 971% 893% 922% <br /> ' Toluene-d8 103% 931% 101% 105% 966% <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 /> ' (pglL)= micrograms p er or parts lion(ppb) <br /> ANALYST APPROVED BY 12. <br /> Clali J Cone J mes C Philips <br /> aboratory Director <br />