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' CASTLE ANALYTICAL LABORATORY <br />' Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209)384-2930 <br /> Fax (209)384-1507 <br /> Advanced GeoEnvironmentai, Inc Client Project ID Pacific Car Wash Method EPA 5030/8260 <br />' of Northern California Reference Number 3967 Instrument ID HP Series II <br /> 4005 North Wilson Way Matrix Water Prepared 8-23-00 <br /> Stockton CA 95205 Analyst Clari J Cone Analyzed 8-23-00 <br /> Attn Tim Cuellar Reported 8-30-00 <br /> QUALITY CONTROL DATA REPORT <br />' SPIKE ID VWMS-8230 <br /> Reporting BLANK Spiking Control %R <br />' Limit Result Level Spike Limits <br /> IL /L /L %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 080 ND 125 822% 70-130 <br />' <br /> Methyl t-but I ether (MTBE) 0 010 ND 250 103% 70-130 <br /> Duso rap l ether DIPE 0 010 ND 250 120% 70-930 <br /> Ethyl t-But I ether(ETBE) 0 010 ND 250 113% 70-130 <br /> t-Am I meth,l ether(TAME) 0010 ND 260 113% 70-130 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 0 010 958% 100 947% 70-130 <br /> Toluene-d8 0 010 100% 100 989% 70-130 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> !L %R %R <br /> COMPOUNDS <br /> t-Blit I Alcohol(t-BA) 125 905% 127% 70-130 333% <br /> Methyl t-but I ether (MTBE) 250 948% 968% 70-130 209% <br /> Dusopro 1 ether(DIPE) 250 101% 101% 70-130 0396% <br /> Ethyl t-But I ether ETBE 250 952% 904% 70-130 517% <br /> t-Ami methyl ether(TAME) 250 105% 968% 70-130 832% <br /> Surrogate <br /> I 1 2-Dichloroethane-d4 100 980% 939% 70-130 427% <br /> Toluene-d8 10 0 102% 994% 70-130 209% <br /> The LCS(Laboratory Check Samole) is a control sample of known intarferont froe mafnv that m fo,+�eYi with re„rA +a+ove a .a!,Ies anT <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 /> ANALYST APPROVED BY /J <br /> C! J Cone <br /> Ja es C -Phillips <br /> nvironmental Lab Director <br />