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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 GeoEnvironmental, Inc. Client Project ID: Grewal's Market Method: EPA 5030/8260 <br /> of Northern California Reference Number:3848 Instrument ID: HP Series II <br /> 837 Shaw Road Matrix:Water Prepared: 6-25-01 <br /> Stockton,CA 95215 Analvst: Clari J. Cone Analyzed: 6-25-01 <br /> Attn:Tim Cuellar Reported: 7-5-01 <br /> QUALITY CONTROL DATA REPORT <br />' SPIKE ID: VWMS-6251 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> /L /L /L %R <br /> COMPOUNDS <br /> t-Butyl Alcohoi(t-BA) 0.80 ND 75.0 97.3% 70-130 <br />' Methyl I-lutyl ether (MTBE) 0.090 ND 2.50 98.4% 70-130 <br /> Diisopro I ether(DIPE) 0.010 ND 2.50 83.2% 70-13G <br /> Ethyl t-Butyl ether(ETBE) 0.010 ND 2.50 90.4% 70-130 <br /> t-Am l methyl ether(TAME) 0.010 ND 2.50 82.8% 70-130 <br /> t 1,2-Dichloroethane 1,2-DCA 0.010 NO 2.50 113% 70-130 <br /> Ethylene dibromide(EDB) 0.010 ND 2.50 94.0% 70-130 <br /> Surro ates; <br /> 1,24Dic1lomethane-14 0.010 97.3% 10.0 94.0% 70-130 <br />' Toluene-d8 0.010 101% 10.0 92.3% 70-130 <br /> Spiking MATRIX MATRIX %R %RPD <br /> tLevel SPIKE SPIKE DUP Limits <br /> !L %R %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 75.0 124% 149% 70-130 17.3% <br />' <br /> Methyl t-but I ether (MTBE) 2.50 B9.2% 87.6% 70-130 1.36% <br /> Diisa rap I ether(DIPE) 2.50 93.2% 82.0% 70-130 12.8% <br /> Ethyl t-But I ether(ETBE) 2.50 90.4% 85.2% 70-130 5.92% <br /> t-Am I methyl ether(TAME) 2.50 81.6% 78.4% 70-130 3.96% <br /> 1,2-Dichloroethane 1,2-DCA 2.50 102% 106% 70-130 4.53% <br /> Ethylene dibromide(EDB) 2.50 99.6% 107% 70-130 6.98% <br /> Surrogate: <br /> 1,2-Dichloroethane-d4 10.0 98.6% 97.6% 70-130 1.02% <br />' Toluene-d8 10.0 90.5% 92.2% 70-130 1.86% <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 MS/MSD's are advisory only and are not used to accept or <br /> reject batch results. <br />' ANALYST; 0 APPROVED BY: <br /> C 6, Cone Jas iiiips <br /> oratory Director <br /> 1 <br />