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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Dnve,Atwater, CA 95301 Phone (289)384-2930 <br /> Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Pacific Car Wash Method EPA 5030/8260 <br />' of Northern California Reference Number 4327 Instrument 10 HP 5972MS <br /> 837 Shaw Road Matrix Water Prepared 01-10-02 <br /> Stockton, CA 95215 Analyst Clan J Cone Analyzed 01-10-02 <br /> Attn Tim Cuellar Reported 01-14-02 <br /> QUALITY CONTROL DATA REPORT <br />' SPIKE ID VWMS-1142 <br /> Reporting BLANK Spiking Control %R <br />' Limit Result Level Spike Limits <br /> /L /L IL %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA)-__ 20 ND 750 889% 70-130 <br />' <br /> Methyl t-bu I ether MTBE 050 ND 250 111% 70-130 <br /> Diiso rop I ether(DIPE) 050 ND 250 108% 70-130 <br /> Ethyl t-Butyl ether ETBE 060 ND 250 104% 70-130 <br /> t-Am I methyl ether(TAME) 050 ND 250 111% 70-130 <br /> 1 2-Dichloroethane 1 2-DCA 050 ND 250 104% 70-130 <br /> Ethylene dibromide(EDB) 050 ND 250 122% 70-130 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 10 108% 100 101% 70-130 <br /> Toluene-d8 E] <br /> 10 112% 10 0 114% 70-130 <br /> Y <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> IL %R %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 750 135% 124% 70-130 856% <br /> Methyl t-but I ether MTBE 250 804% 101% 70-130 137% <br /> Dnsopropyl ether DIPE 250 111% 115% 70-130 319% <br /> Ethyl t-But l ether ETBE 250 116% 109% 70-130 638% <br /> t-Am l methyl ether(TAME) 250 126% 110% 70-130 131% <br /> 1,2-Dichloroethane 1,2-OCA 250 856% 888% 70-130 260% <br /> Eth lene dibromide EDB 250 123% 1 118% 70-130 433% <br /> .Surrogate <br /> 1,2-Dichloroethane-d4 100 113% 1 111% 70-130 1 965'. <br /> Toluene-dB 100 988% 101% 70-130 1 71 <br /> The LCS(Laboratory Check Sample)is a control sample of known, interferent free matnx that is fortified with representative analytes and <br /> analyzed using the same reagents preparation and analytical methods employed for the samples The LCS%recovery rs used for validation <br /> of sample batch results Due to matrix effects the OC limits and recoveries for MSIMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> t ANALYST APPROVED BY <br /> Clair J Cone Ja s Phillips <br /> Iaboratory Director <br />