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1 <br /> • 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 GeoEnvlronmental, Inc Client Project ED Rainwater Car Wash Sampled 08-16-02 <br /> of Northern California Reference Number 4987 Received 08-20-02 <br /> 837 Shaw Road Sample Description Water Extracted 08-23-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 0823-02 <br /> Attn Tim Cuellar Lab Numbers 4987-1W,2W 3W,4W Reported 09-05-02 <br />� 1 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br /> 1 <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW t MW 3 MW 4 MW 5 <br /> 08-16-02 08-16-02 08-16-02 08-16-02 <br /> —--- - - --(pg/L) (ug/L) (ug/L) (u91L)-- -- (ug1L) <br /> t <br /> FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 420 960 20 NO <br /> ' Di-Isopropyl Ether (DIPS) 050 NO ND NO NO <br /> Ethyl tert-Butyl Ether (ETBE) 050 NO ND ND ND <br /> I tert-Amyl Methyl Ether(TAME) 050 19 23 ND ND <br /> tert-Butanoi(TBA) 20 ND NO ND ND <br /> Report Limit Multiplication factor 5" 5* 1 1 <br /> Report Limit Multiplication f=actor for MTBE 100 100 <br /> 1 , <br />� 1 <br /> I <br /> I <br /> Surrogate Recoveries <br /> 1 2-Dlchloroethane-d4 814% 903% 784% 872% <br /> Toluene-d8 947% 102% 115% 994% <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 /> (pg1L)= micrograms per liter or parts per billion(ppb) <br /> ANALYST azlzel <br /> //,I— �� APPROVED BY <br /> Clan J Cane �^ J es Phillips <br /> aboratory Drrecfor i <br /> i <br /> ' E <br />