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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 /> Geological Technics, Inc. Client Project ID: 1218.2 Method: EPA 5030/8260 <br /> 1101 7th Street Client Project Name:Elving(Broadway) Instrument ID: HP Series II <br /> Modesto,CA 95354 Reference Number:6349 Extracted: 07-15-05 <br /> Attn: Ray Kablanow Sample Prep/Analysis Method: EPA 5030/8260 Analyzed: 07-15-05 <br /> Analyst: Scott Foster Reported: 07-29-05 <br /> QUALITY CONTROL DATA REPORT <br /> SPIKE ID., VSMS-7155 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> mg/Kgmg/Kg m lK m /K %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 0.60 ND 3.00 114% 55,3- 153 <br /> Methyl t-but I ether (MTBE) 0.010 ND 0.100 112% 60.4-137 <br /> Dfiso ro I ether(DIPE) 0.010 ND 0.100 120% 70.0-130 <br /> Ethyl t-Butyl ether ETBE 0.010 ND 0.100 112% 70.0-130 <br /> t-Am ]methyl ether(TAME) 0.010 ND 0.100 102% 70.0-130 <br /> 1.2-Dichloroethane(1,2-DCA) 0.010 ND 0.100 112% 63.6-138 <br /> Ethylene dibromide(EDB) 0.010 ND 0.100 126% 66.7- 129 <br /> .SGrrp ates: <br /> 1,2-Dichloroethane-d4 0.010 103% 0.400 108% 59.2-135 <br /> Toluene-d8 0,010 106% 0.400 121% 62.9- 132 <br /> Spiking MATRIX MATRIX °/9R °/9RPD <br /> Level SPIKE SPIKE DUP Limits <br /> mg/Kg %R %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 3.00 80.1% 87,0% 55.3-153 8.33% <br /> Methyl t-but l ether MTBE) 0.100 78.0% 82.0% 60.4-137 5.00% <br /> Diiso ro l ether DIPE 0.100 78.0% 78.8°/9 70.0-130 1.02°/9 <br /> Eth I t-But I ether(ETBE) 0.100 78.8% 80.4% 70.0-130 2.01% <br /> t-Ami methyl ether(TAME) 0.100 72.4% 74.8% 70,0-13() 2.99% <br /> 1,2-Dichloroethane 1.2-DCA 0.100 81.S% 84.81/D 63.6-1-38 3.85% <br /> Ethylene dibromide(EDB) 100 84.0% 84.4% 66.7-129 1 0.475% <br /> Surrogate: <br /> 1,2-Dichloroethane-d4 0.400 73.0% 75.5% 59.2-135 3.37% <br /> Toluene-d8 0.400 74.9% 78.3% 62.9-132 4.44% <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 samp}es. The LCS %recovery is used for validation <br /> of sample batch results. Due to matrix effects,the QC fimits and recoveries for MS/MSD's are advisory only and are not used to accept or <br /> reject batch results. <br /> APPROVED BY: APPROVED BY: <br /> Clari J. Cone arrre i!lips <br /> Laboratory Manager Laboratory Director <br />