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Entech Analytical Labs Inc. 3334 Victor Court , Santa Clara, CA 95054 Phone. 408 588-0200 Fax; 408 588-0201 Quality Control - Method Blank • Liquid IValidated by 3HSIANG-10/07/04 QC Batch ID• WGC4041001 Analysts Date 10/1/2004 Method Blank Method EPA 8015 MOD.(Purgeable) Parameter Result DF PQLR Units TPH as Gasoline ND 1 50 Ng/L Surrogate for Blank %Recovery Control Limits 4-Bromofluorobenzene 986 65 - 135 Quality Control - Laboratory Control Spike 1 Duplicate Results Liquid Reviewed by JHS ANG-10/07/04 QC Batch ID WGC4041001 Analysis Date 10/1/2004 LCS Method EPA 8015 MOD (Purgeable) Cone Units µg/L Parameter Blank Spike Amt SpikeResult QC Type Analysis Date %Recovery RPD RPD Lmuts RecoveryLimits TPH as Gasoline <50 250 233 LCS 10/1/2004 934 65- 135 ' Surrogate %Recovery Control Limits 4-Bromofluorobenzene 863 65 - 135 0iSD Method EPA 8015 MOD (Purgeable) Cone Units pg/L ameter Blank Spike Amt SpikeResult QC Type Analysis Date %Recovery RPD RPD Limits RecoveryLimits TPH as Gasoline <50 250 241 LCSD I0/1/2004 966 34 25 65- 135 Surrogate %Recovery Control Limits 4-Bromofluorobenzene 88 65 - 135 ' Quality Control - Matrix Spike 1 Duplicate Results Liquid ' Reviewed by 7HSIANG- 10/07/04 QC Batch ID WGC4041001 Analysis Date 10/1/2004 ' Method EPA 8015 MOD (Purgeable) Cone Units µSIL Sample Spike Spike Analysis RPD Recovery Parameter Result Amount Result QC Type Date %Recovery RPD Limits Limits ' MS SampleNumber 40627-005 TPH as Gasoline ND 250 254 MS 10/1/2004 102 65- 135 Surrogate %Recovery Control Limits 4-Bromofluorobenzene 115 65 - 135 MSD SampleNumber 40627-005 TPH as Gasoline ND 250 260 MSD 10/1/2004 104 23 25 65- 135 f Surrogate %Recovery Control Limits 4-Bromofluorobenzene 972 65 - 135 I QCReport-lglantz 10114!2004 12 05 11 AM