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CASTLE ANALYTICAL LABORATORY Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 384-2930 ' Fax (209) 384-1507 Krazan &Associates, Inc Client Project ID 034-97252 Method EPA 503018015M,8020 ' 123 Commerce Circle Reference Number 1410 Instrument ID Var-GC1 Sacramento CA 95815 Matrix Soil Prepared 1-1598 Attn Joe Brusca Analyst Clan Cone Analyzed 1-1698 Reported 1-2298 I QUALITY CONTROL DATA REPORT IANALYTE Gasoline Benzene Toluene Ethyl Benzene Total Xylenes ' Spike Concentration 2 00 200 200 200 400 ' Units mg/kg ug/kg ug/kg ug/kg uglkg LCS Batch # VG-1218 VB-1218 VB-1218 VB 1218 VB-1218 ' LCS % Recovery 87 7% 102% 106% 101% 103% Surrogate Recovery 101% 79 9% 79 9% 79 9% 799% Control Limits 70-130 % 70-130 % 70-130 % 70-130 % 70-130 % MS/MSD Batch # VG-1218 VB-1218 VB-1218 VB-1218 VB-1218 I MS % Recovery 58 8% 71 3% 77 7% 76 1% 72 9% Surrogate Recovery 75 5% 75 6% 75 6% 75 6% 75 6% MSD % Recovery 60 6% 684% 741% 73 6% 71 1% Surrogate Recovery 746% 609% 609% 609% 609% Relative % Difference 289% 392% 409% 3 18% 2 29% Methanol Blank ND ND ND ND NO Surrogate Recovery 95 2% 95 1% 95 1% 95 1% 95 1% Note The QC samples analyzed on 1-15-98 were rnadvertantly not spiked Surrogate values were used to accept results Reported QC are from the next soil batch Please Note The LCS {Laboratory Check Sample) is a control sample of known, interferent free matrix that is fortified with representative analytes and I analyzed using the same reagents, preparation and analytical methods employed for the samples The LCS % recovery is used for validation 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 refect batch results ANALYST �/l�C� APPROVED BY Cl'.;' A Clary J Cone Ja s Blips 7v1ronmental Lab arrector