REPORT OF LABORATORY ANALYSIS FOR PCDD/PCDF

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1 Pace Analytical Services, Inc Elm Street Phone: Fax: Report Prepared for: Ned Engleson Specialty Analytical SW 95th Place Tualatin OR Report Information: Pace Project #: Sample Receipt Date: 10/18/2007 Client Project #: Client Sub PO #: N/A State Cert #: N/A REPORT OF LABORATORY ANALYSIS FOR PCDD/PCDF Invoicing & Reporting Options: The report provided has been invoiced as a Level 2 PCDD/PCDF Report. If an upgrade of this report package is requested, an additional charge may be applied. Please review the attached invoice for accuracy and forward any questions to Scott Unze, your Pace Project Manager. This report has been reviewed and prepared by: Scott Unze, Project Manager (612) (612) (fax) scott.unze@pacelabs.com Report Prepared Date: November 8, 2007 Report of Laboratory Analysis This report should not be reproduced, except in full, 1 of 9 Report No

2 Pace Analytical Services, Inc Elm Street Phone: Fax: DISCUSSION This report presents the results from the analyses performed on one sample submitted by a representative of Specialty Analytical. The sample was analyzed for the presence or absence of polychlorodibenzo-p-dioxins (PCDDs) and polychlorodibenzofurans (PCDFs) using a modified version of USEPA Method Reporting limits were set to correspond to one-fifth of the lowest calibration points. The recoveries of the isotopically-labeled PCDD/PCDF internal standards in the sample extract ranged from %. All of the labeled standard recoveries obtained for this project were within the % target range specified in Method Also, since the quantification of the native 2,3,7,8-substituted congeners was based on isotope dilution, the data were automatically corrected for variation in recovery and accurate values were obtained. The sample was received and extracted outside the 30-day hold time recommended in the method; therefore, the reported values should be regarded as minimum possible concentrations. In some cases, interfering substances impacted the determinations of PCDD or PCDF congeners. The affected values were flagged "I" where incorrect isotope ratios were obtained, or "E" where polychlorinated diphenyl ethers were present. A laboratory method blank was prepared and analyzed with the sample batch as part of our routine quality control procedures. The results show the blank to be free of PCDDs and PCDFs at the reporting limits. These results indicate that the sample processing steps did not significantly impact the results of the field sample determinations. A laboratory spike sample was also prepared with the sample batch using clean sand that had been fortified with native standard materials. The results show that the spiked native compounds were recovered at 76-93%. These results indicate a high degree of accuracy for these determinations. The response obtained for the labeled HpCDD in calibration standard analysis F71103B_18 was outside the target range. As specified in the method, the average of the daily response factors for this compound was used in the calculations for the samples from this runshift. The affected values were flagged "Y" on the results tables. It should be noted that the accuracy of the native congener determinations was not impacted by this deviation. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, 2 of 9 Report No

3 Appendix A Sample Management 3 of 9 Report No

4 4 of 9 Report No

5 5 of 9 Report No

6 Appendix B Sample Analysis Summary 6 of 9 Report No

7 Method 8290 Sample Analysis Results Client - Specialty Analytical Client's Sample ID Lab Sample ID Filename U71107B_10 Injected By SMT Total Amount Extracted 12.5 g % Moisture 20.0 Dry Weight Extracted 10.0 g ICAL Date 09/27/2007 CCal Filename(s) U71107B_02 & U71107B_18 Method Blank ID BLANK Native Isomers Conc EMPC RL Matrix Dilution Collected Received Extracted Analyzed Internal Standards Pace Analytical Services, Inc Elm Street - Suite 200 Soil NA 07/24/ /18/ /29/ /07/ :56 ng's Added Tel: Fax: Percent Recovery 2,3,7,8-TCDF A 2,3,7,8-TCDF-13C Total TCDF ,3,7,8-TCDD-13C ,2,3,7,8-PeCDF-13C ,3,7,8-TCDD JA 2,3,4,7,8-PeCDF-13C Total TCDD ,2,3,7,8-PeCDD-13C ,2,3,4,7,8-HxCDF-13C ,2,3,7,8-PeCDF ,2,3,6,7,8-HxCDF-13C ,3,4,7,8-PeCDF ,3,4,6,7,8-HxCDF-13C Total PeCDF ,2,3,7,8,9-HxCDF-13C ,2,3,4,7,8-HxCDD-13C ,2,3,7,8-PeCDD ND ,2,3,6,7,8-HxCDD-13C Total PeCDD ND ,2,3,4,6,7,8-HpCDF-13C ,2,3,4,7,8,9-HpCDF-13C ,2,3,4,7,8-HxCDF E 1,2,3,4,6,7,8-HpCDD-13C ,2,3,6,7,8-HxCDF OCDD-13C ,3,4,6,7,8-HxCDF J 1,2,3,7,8,9-HxCDF J 1,2,3,4-TCDD-13C 2.00 NA Total HxCDF ,2,3,7,8,9-HxCDD-13C 2.00 NA 1,2,3,4,7,8-HxCDD ND A 2,3,7,8-TCDD-37Cl ,2,3,6,7,8-HxCDD IA 1,2,3,7,8,9-HxCDD ND A Total HxCDD ND ,2,3,4,6,7,8-HpCDF Total 2,3,7,8-TCDD 1,2,3,4,7,8,9-HpCDF Equivalence: 6.7 Total HpCDF (Using ITE Factors) 1,2,3,4,6,7,8-HpCDD IA Total HpCDD ND OCDF OCDD Conc = Concentration (Totals include 2,3,7,8-substituted isomers). EMPC = Estimated Maximum Possible Concentration RL = Reporting Limit. Results reported on a dry weight basis and are valid to no more than 2 significant figures. J = Value below calibration range A = Reporting Limit based on signal to noise E = PCDE Interference I = Interference present ND = Not Detected NA = Not Applicable NC = Not Calculated REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, 7 of 9 Report No

8 Pace Analytical Services, Inc Elm Street - Suite 200 Method 8290 Blank Analysis Results Tel: Fax: Lab Sample ID Filename Total Amount Extracted ICAL Date CCal Filename(s) BLANK F71103B_ g 08/30/2007 F71103B_02 & F71103B_18 Matrix Dilution Extracted Analyzed Injected By Solid NA 10/29/ /03/ :10 BAL Native Isomers Conc EMPC RL Internal Standards ng's Added Percent Recovery 2,3,7,8-TCDF ND ,3,7,8-TCDF-13C Total TCDF ND ,3,7,8-TCDD-13C ,2,3,7,8-PeCDF-13C ,3,7,8-TCDD ND ,3,4,7,8-PeCDF-13C Total TCDD ND ,2,3,7,8-PeCDD-13C ,2,3,4,7,8-HxCDF-13C ,2,3,7,8-PeCDF ND ,2,3,6,7,8-HxCDF-13C ,3,4,7,8-PeCDF ND ,3,4,6,7,8-HxCDF-13C Total PeCDF ND ,2,3,7,8,9-HxCDF-13C ,2,3,4,7,8-HxCDD-13C ,2,3,7,8-PeCDD ND ,2,3,6,7,8-HxCDD-13C Total PeCDD ND ,2,3,4,6,7,8-HpCDF-13C ,2,3,4,7,8,9-HpCDF-13C ,2,3,4,7,8-HxCDF ND ,2,3,4,6,7,8-HpCDD-13C Y 1,2,3,6,7,8-HxCDF ND OCDD-13C ,3,4,6,7,8-HxCDF ND ,2,3,7,8,9-HxCDF ND ,2,3,4-TCDD-13C 2.00 NA Total HxCDF ND ,2,3,7,8,9-HxCDD-13C 2.00 NA 1,2,3,4,7,8-HxCDD ND ,3,7,8-TCDD-37Cl ,2,3,6,7,8-HxCDD ND ,2,3,7,8,9-HxCDD ND Total HxCDD ND ,2,3,4,6,7,8-HpCDF ND Total 2,3,7,8-TCDD 1,2,3,4,7,8,9-HpCDF ND Equivalence: 0.00 Total HpCDF ND (Using ITE Factors) 1,2,3,4,6,7,8-HpCDD ND Total HpCDD ND OCDF ND OCDD ND Conc = Concentration (Totals include 2,3,7,8-substituted isomers). EMPC = Estimated Maximum Possible Concentration RL = Reporting Limit Results reported on a total weight basis and are valid to no more than 2 significant figures. Y = Calculated using average of daily RFs REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, 8 of 9 Report No

9 Pace Analytical Services, Inc Elm Street - Suite 200 Method 8290 Laboratory Control Spike Results Tel: Fax: Lab Sample ID Filename Total Amount Extracted ICAL Date CCal Filename(s) Method Blank ID LCS F71103B_ g 08/30/2007 F71103B_02 & F71103B_18 BLANK Matrix Dilution Extracted Analyzed Injected By Solid NA 10/29/ /03/ :38 BAL Native Qs Qm % Internal ng's Percent Isomers (ng) (ng) Rec. Standards Added Recovery 2,3,7,8-TCDF ,3,7,8-TCDF-13C Total TCDF 2,3,7,8-TCDD-13C ,2,3,7,8-PeCDF-13C ,3,7,8-TCDD ,3,4,7,8-PeCDF-13C Total TCDD 1,2,3,7,8-PeCDD-13C ,2,3,4,7,8-HxCDF-13C ,2,3,7,8-PeCDF ,2,3,6,7,8-HxCDF-13C ,3,4,7,8-PeCDF ,3,4,6,7,8-HxCDF-13C Total PeCDF 1,2,3,7,8,9-HxCDF-13C ,2,3,4,7,8-HxCDD-13C ,2,3,7,8-PeCDD ,2,3,6,7,8-HxCDD-13C Total PeCDD 1,2,3,4,6,7,8-HpCDF-13C ,2,3,4,7,8,9-HpCDF-13C ,2,3,4,7,8-HxCDF ,2,3,4,6,7,8-HpCDD-13C Y 1,2,3,6,7,8-HxCDF OCDD-13C ,3,4,6,7,8-HxCDF ,2,3,7,8,9-HxCDF ,2,3,4-TCDD-13C 2.00 NA Total HxCDF 1,2,3,7,8,9-HxCDD-13C 2.00 NA 1,2,3,4,7,8-HxCDD ,3,7,8-TCDD-37Cl ,2,3,6,7,8-HxCDD ,2,3,7,8,9-HxCDD Total HxCDD 1,2,3,4,6,7,8-HpCDF ,2,3,4,7,8,9-HpCDF Total HpCDF 1,2,3,4,6,7,8-HpCDD Total HpCDD OCDF OCDD Qs = Quantity Spiked Qm = Quantity Measured Rec. = Recovery (Expressed as Percent) P = Recovery outside of target range X = Background subtracted value Nn = Value obtained from additional analysis NA = Not Applicable * = See Discussion REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, 9 of 9 Report No

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