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1 <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 Rainwater Carwash Method EPA 5030/8260 <br /> of Northern California Lab Reference Number 5218 Instrument ID NP Serres II <br /> 837 Shaw Road Matrix Water Prepared 11-14-02 <br /> Stockton, CA 95215 Analyst S Foster Analyzed 11-14-02 <br /> Attn Tim Cuellar Reported 11-26-02 <br /> ' QUALITY CONTROL DATA REPORT <br /> SPIKE ID VWMS-N142 <br /> Reporting BLANK Spiking Control %R <br /> ' Limit Result Level Spike Limits <br /> uIL u2 u /L %R <br /> COMPOUNDS <br /> t-Butyl Alcohol(t-BA) 20 ND 750 945% 70-130 <br /> Methyl t-butyl ether MTBE 050 ND 250 105% 70-130 <br /> Dusopropyl ether(DIPE) 050 ND 250 105% 70-130 <br /> Ethyl t-Butyl ether ETBE) 050 ND 250 964% 70-130 <br /> t-Am I methyl ether TAME 050 ND 250 928% 70-130 <br /> 1,2-Dichloroethane 1 2-DCA 050 ND 250 836% 70-130 <br /> Ethylene dibromide EDB 050 ND 250 109% 70-130 <br /> 1 1-Dichloroethene 1 1 DCE) 050 ND 250 924% 70-130 <br /> Benzene 050 ND 250 111% 70-130 <br /> Trichloroethene(TCE) 050 ND 250 104% 70-130 <br /> Toluene 050 ND 250 108% 70-130 <br /> Chlorobenzene 050 ND 250 106% 70-130 <br /> Surrogate <br /> ' Dibromofluoromethane 10 0 106% 100 100% 70- 3 <br /> 1 2-Drchloroethane-d4 10 0 867% 100 102% 70-130 <br /> Toluene-dB 10 0 109% 100 103% 70-130 <br /> 4-Bromofluorobenzene 10 0 982% 100 961% 70-130 <br /> ' Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> u IL %R %R <br /> ' COMPOUNDS <br /> t-Butyl Alcohol(t-BA) 750 852% 108% 70-130 237% <br /> Methyl t-butyl ether (MTBE) 250 988% 102% 70-130 250% <br /> Driso ro I ether DIPE 250 109% 115% 70-130 537% <br /> ' Eth l t-Butyl ether ETBE 250 992% 105% 70-130 587% <br /> t-Am I methyl ether AME) 250 872% 964% 70-130 904% <br /> 1 2-Drchloroethane(1 2-DCA 250 880% 824% 70-130 603% <br /> Ethylene dibromide EDB 250 102% 101% 70-130 1 0787% <br /> ' 1 1-Dichloroethene 1 1 DCE 250 100% 832% 70-130 176% <br /> Benzene 250 112% 107% 70-130 467% <br /> Trichloroethene(TCE) 250 960% 109% 70-130 688% <br /> Toluene 250 111% 105% 70-130 505% <br /> ' Chlorobenzene 250 106% 103% 70-130 224% <br /> Surrogate <br /> Dibromofluoromethane 100 130% 126% 70-130 335% <br /> 1 2-Dichloroethane-d4 10 0 109% 104% 70-130 442% <br /> Toluene-d8 10 0 106% 101% 70-130 474% <br /> 4-Bromofluorobenzene 100 989% 950% 70-130 402% <br /> ' ANALYST +. APPROVED BY "Al� <br /> Clan J Cone Ja Phillips <br /> La oratory Director j <br /> I <br /> I E III <br />