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' CASTLE ANALYTICAL LABORATORY <br /> • Environmental TestingServices 2333 Shuttle Drive Atwater, CA 95301 Phone (209)384-2930 <br />' Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Pacific Carwash Method EPA 5030/8260 <br /> of Northern California Reference Number 7014(1-20) Instrument ID HP 5972 MS <br /> 8 i7 Shaw Road Sample Description Water Prepared 06-09-04 <br /> Stockton CA 95215 Analyst Scott Foster Analyzed 06-09-04 <br /> Attn Tim Cuellar <br /> Reported 06-11-04 <br /> tQUALITY CONTROL DATA REPORT <br />' SPIKE 0 VWMS-6094 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> /L <br /> OMPOUNDS U !L p IL %R <br /> C <br /> t-But i Alcohol(t-BA) 20 ND 750 -1 n- 55 3 153 <br />' <br /> Methyl t-but eether (MTBE) 050 ND 250 124% 604- 137 <br /> Diisoprop I ether(DIPS) 050 ND 250 108% 70 5-131 <br /> Ethyl t-Butyl ether(ETRE) 050 ND 250 120% 72 1 - 131 <br /> Elene <br /> methyl ether(TAME) 050 ND 250 120% 717- 119 <br /> oethane (1 2-DCA) 050 ND 250 128% 63 6-138 <br /> bromide(EQf3) 0 50 ND 250 81 6% 667-129 <br /> ethane-d4 10 105% 10 0 109% 592lie in 104% 10 0 107% fit 9-132 <br /> Spiking MATRIX MATRIX %R 0 app <br />' Level SPIKE SPIKE DUP Limits <br /> !� /L %R %R <br /> fMeth <br /> OMPOUNDS <br /> But I Alcohol(t BA) 750 849% 828% 55 3- 153 235% <br /> I I t-but I ether {MTBE) 250 106% 103% 604- 137 297% <br /> asoprop l ether(DfPE) 250 100% 992% 705- 131 1 0 791% <br /> Ethyl f-But I ether(ETRE) 250 1p5% 109% 72 1 - 131 13 69% <br /> t-Am i methyl ether(TAME) 2 50 102% 105% 71 7- 119 <br />' 1 2-Dichloroethane(1 2-DCA) 250 121% 118% 63 <br /> Ethylene dibromide (EDB) 250 62 8% 68 4% 667- 129 1 854% <br /> surrogate <br /> 112-DichlOroethane-d4 19932%2% 104% 592- 135 10 76% <br /> Toluene-d8 10 0 107% 100°A° 1 629- 432 7 25% <br /> FThe LCS (Laboratory Check Sample) is a control sample of known interferent free matrix that is fortified with representative analytes and <br /> anaivzed uS�ng the came reage^+s, p,epu of on and anafyt�cal inetnoas employed for the samples The LCS% recovery is used for validation <br /> of sample batch results Due to matrix effects,the QC limits and recoveries for MS/MSD's are advisory only and are not used to accept or <br /> reject batch results <br /> I0 ANALYST Clan, APPROVED BY <br /> ir Cane JaMq&C hillrps <br /> La story Director <br />