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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuffle Drive,Atwater,CA 95301 Phone: (209)384-2930 <br /> Certificate#2480 Fax: (209)384-1507 <br /> Advanced GeoEnvironmental, Inc. Client Project ID:Grewals Market Method: EPA 5030/8260 <br /> of Northern California Reference Number:6151 Instrument ID: HP 5972 MS <br /> 837 Shaw Road Matrix:Water Prepared: 10-02-03 <br /> Stockton, CA 95215 Analyst: Scott Faster Analyzed: 10-02-03 <br /> Attn:Tim Cuellar Reported: 10-14-03 <br /> ' QUALITY CONTROL DATA REPORT <br /> SPIKE ID: VWMS-4023 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> IL p !L /L %R <br /> COMPOUNDS <br /> t-But i Alcohol(t-BA) 20 ND 75.0 106% 55.3- 153 <br /> 1 <br /> methyl t-butyl ether (MTBE)• 0.50 NO 2,50 98.8% 60-4-137 <br /> Diiso ro I ether(DIPE) 0.50 ND 2.50 108% 70,5-131 <br /> Ethyl t-But I ether(ETBE) 0.50 ND 2.50 112% 72.1 -131 <br /> t-Am I methyl ether(TAME) 0.50 ND 2.50 119% 71.7-119 <br /> 1,2-Dichloroethane(1,2-DCA) 0.50 ND 2.50 132% 63.6-138 <br /> Ethylene dibromide EDB 0.50 ND 2.50 118% 66.7-129 <br /> Surrogates: <br /> 1,2-Dichloroethane-d4 0.50 87.4% 10.0 101% 59.2- 135 <br /> ' Toluene-d8 0.50 88:2% 10.0 97.2% 62.9- 132 <br /> Spiking MATRIX MATRIX %R %RPD <br /> ' Level SPIKE SPIKE DUP Limits <br /> p /L %R %R <br /> COMPOUNDS <br /> t-but I Alcohol (t-BA) 75.0 89.7% 94.3% 55.3-153 4.70% <br /> ' Meth I t-butyl ether (MTBE) 2.50 85.6% 82.8% 60.4- 137 2.06% <br /> Diiso ro I ether(DIPE) 2.50 111% 115% 70.5- 131 3.19% <br /> Efh I t-But I ether(ETBEJ 2.50 116% 112% 72.1 -131 3.16% <br /> t-Am I meth i ether(TAME) 2.50 110% 105% 71.7-119 5.00% <br /> ' 1,2-Dichloroethane(1,2-DCA) 2.50 108% 102% 63.6-138 5.86% <br /> Ethylene dibromide(EDB) 2.50 102% 108% 66.7- 129 4,95% <br /> Surrogate: <br /> 1,2-Dichloroethane-d4 10.0 94.1% 96.4% 59.2-135 2.41% <br /> ' Toluene-d8 10.0 102% 104% 62.9-132 1.95% <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 /> =.- ...:. <br /> of sample batch results. 'Due toymatrix effi3cts,the QC limits and recoveries for MSlMSD's are advisory only and are not used to accept or <br /> reject batch results. <br /> ANALYST: APPROVED BY: <br /> ' Clan J. Cone Jame hillips <br /> La story Director <br /> 1 <br />