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1 <br />' CASTLE ANALYTICAL LABORATORY <br /> S Environmental Testing Services 2333 Shuttle Drive Atwater CA 95301 Phone (209) 384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> FAdvariced GeoEnwronmental Inc Client Project ID Pacific Carwash Method EPA 5030/8260 <br />' orthern California Reference Number 7014(21-24) Instrument ID HP 5972 MS <br /> Shaw Road Sample Description Water Prepared 06-10-04 <br /> kton CA 95215 Analyst Scott Foster Anaiyzed 06-10-04 <br /> Tim Cuellar Reported 05-11-04 <br />' QUALITY CONTROL DATA REPORT <br />' SPIKE ID VWMS-6104 <br /> Reporting BLANK Spiking Control %R <br />' Limit Result Level Spike Limits <br /> COMPOUNDS u IL u 1L u IL %R <br /> t-But I Alcohol(t-BA) 20 NO 750 117% 553- 153 <br />' <br /> Methyl t-but I ether (MTBE) 050 ND 250 120% 604- 137 <br /> Diisoprop I ether(DIPE) 050 ND 250 100% 705- 131 <br /> Ethyl t-Butyl ether(ETBE) 050 ND 250 120% 721 - 131 <br /> t-Ami methyl ether(TAME) 050 ND 250 122% 717- 119 <br /> 1 2-Dichloroethane (1 2-DCA) 050 ND 250 128% 636- 138 <br /> Ethylene dibromide (EDB) 0 50 NO 250 808% 667- 129 <br /> Surrogates <br /> 1 2-Dichleroethane-d4 1 0 985% 100 955% 592- 135 <br />' • Toluene-d8 1 0 985% 100 737% 62 9- 132 <br /> Spiking MATRIX MATRIX %R %RPD <br />' Level SPIKE SPIKE OUP Limits <br /> �f IL %R %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 750 108% 907% 55 T- 153 163% <br />' <br /> Methyl t-but I ether (MTBE) 250 948% 616% 604- 137 646% <br /> Duscpropyi ether(DIPE) 250 109% 107% 705- 131 217% <br /> Ethyi t-But I ether(ETBE) 250 122% 118% 72 1 - 131 3 300/0 <br /> t Am I methyl ether(TAME) 250 124% 112% 71 7- 119 9 12% <br /> 1 2-Dichloroethane (1 2-DCA) 250 125% 114% 636- 138 881% <br /> Ethylene dibromide(EDB) 250 832% 872% 667- 129 469% <br /> Surrogate <br /> 1 2-Dichicroethane-d4 100 110% 107% 592- 135 277% <br /> Toluene-d8 100 989% 104% 629- 132 493% <br /> The LCS(Laboratory Check Sample)is a control sample of known, tnterferent free matrix that is fortified with representative analytes and <br /> a^aiyzAd us^g the same reagents preparation and analytical methuds empioyea ror the samples Tne uCS % recovery is used for validation <br /> of sample batch results Due to matrix effects,the QC limits and recoveries for MSIMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> ANALYST APPROVED BY <br /> Clary J one Ja s C 1Flrps <br /> L oratory Director <br />