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I <br /> • CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater,CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209) 384-1507 <br /> Advanced Geo Environmental Inc Client Project ID Pac Pride West Lane Method EPA 5030/8260 <br /> I of Northern California Reference Number 6555 Instrument ID HP 5972 MS <br /> 837 Shaw Road Sample Description Water Prepared 01-27-04 <br /> Stockton CA 95215 Analyst Scott Foster Analyzed 01-27-04 <br /> Attn Tim Cuellar Reported 02-06-04 <br /> I <br /> QUALITY CONTROL DATA REPORT <br /> SPIKE ID VWMS-1274 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> jr IL /L IL %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 20 ND 750 978% 553- 153 <br /> Methyl t-but I ether (MTBE) 050 ND 250 988% 604- 137 <br /> Diiso ro I ether(RIPE) 050 ND 250 960% 705- 131 <br /> Ethyl t-Butyl ether ETRE) 050 NO 250 112% 72 1 -131 <br /> t-Am I methyl ether(TAME 050 ND 250 101% 71 7- 119 <br /> 1 2-Dschloroethane(1 2-DCA) 050 ND 250 108% 636-138 <br /> Ethylene dibromide EDB 050 NO 250 111% 667-129 <br /> Surrogates <br /> 1,2-Dichloroethane-d4 1 0 107% 100 103% 59 2-135 <br /> Toluene-dB 1 0 111% 100 1110A 629- 132 <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) 75 0 106% 104% 553-153 248% <br /> Methyl t-but l ether MTBE 250 868% 904% 604-137 377% <br /> Diiso ro I ether(DIPS) 250 928% 928% 705-131 000% <br /> Ethyl t-But I ether(ETRE) 250 117% 118% 721 -131 1 36% <br />' t-Am I methyl ether TAME 250 904% 892% 71 7-119 1 21% <br /> 1 2-Dichloroethane(1 2-DCA) 250 108% 102% 636-138 507% <br /> Ethylene dibromide(EDB) 250 968% 101% 667- 129 405% <br /> Surrogate <br />' 1 2-Dichloroethane-d4 100 114% 107% 592-135 579% <br /> Toluene-d8 100 106% 104% 629- 132 t 1 05% <br /> I <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 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 /> i <br />' ANALYST APPROVED BY <br /> Glan J Cone J es C Phi rps <br /> aboratory Director <br /> 1 <br />