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i <br /> • CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater CA 95301 Phone (209)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 6241 Instrument ID HP 5972 MS <br />' 837 Shaw Road Matrix Soil Prepared 10.23-03 <br /> Stockton,CA 95215 Analyst Scott Foster Analyzed 10-23-03 <br /> Attn Tim Cuellar Reported 11-07-03 <br /> QUALITY CONTROL DATA REPORT <br />' SPIKE ID VSMS-0233 <br /> Reporting BLANK Spiking Control %R <br />' Limit Result Level Spike Limits <br /> mg/Kg mg/Kg mg/K %R <br /> COMPOUNDS <br /> t-But I Alcohol t-BA) 080 ND 300 112% 70-130 <br /> t <br /> Methyl t-but I ether (MTBE) 0 030 ND 0 100 888% 70-130 <br /> Diiso ro I ether(DIPE) 0 010 ND 0 100 732% 70-130 <br /> Ethyl t-But I ether(ETBE) 0 010 ND 0 100 748% 70-130 <br /> t-Am I methyl ether TAME 0 010 ND 0 100 836% 70-130 <br /> 1 2-Dichloroethane(1 2-DCA) 0 010 ND 0 100 119% 70-130 <br /> Ethyl ne dibromide(EDB) 0 01 D ND 0 100 102% 70-130 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 0 010 1300/C 0 400 128% 70-130 <br />' Toluene-d8 0 010 102% 0 400 J 108% 70-130 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> mg/Kg %R %R <br /> COMPOUNDS <br /> t-But 1 Alcohol(I-BA) 300 105% 819% 70-130 246% <br />' <br /> Methyl t-but I ether (MTBE) 0 100 760% 708% 70-130 655% <br /> Dusoprap I ether(DIPE) 0 100 624% 596% 70-130 459% <br /> Ethyl t-But I ether(ETBE 0 100 632% 652% 70-130 312% <br /> t-Am I methyl ether TAME) 0 100 748% 792% 70-130 5 71% <br />' 1 2-Dichloroethane 1 2-DCA) 0 100 904% 968% 70-130 684% <br /> Ethylene dibromide(EDB) 0 100 744% 792% 70-130 625% <br /> Surrogate <br /> 1,2-Dichloroethane-d4 0 400 80 0% 102% 70-130 246% <br />' Toluene-d8 0 400 75 7% 74 8% 70-130 1 20% <br /> ' The LCS(Laboratory Check Sample)is a control sample of known, interferent free matrix 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 MSIMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> ' ANALYST APPROVED BY-boratoryiDtrector <br /> Clan J Cone hillips <br />