### From: "Scott Unze" <Scott.Unze@pacelabs.com> To: <jrickun@chorus.net>, Ron Myers/RTP/USEPA/US@EPA, Jeff Telander/RTP/USEPA/US@EPA, <David.McKeown@hanson.biz>, <Paul.Anderson@hanson.biz>, "Steve Hannan" <Steve.Hannan@pacelabs.com> Date: 10/20/2010 04:19 PM Subject: Re: Fwd: Additional Pace Analytical Laboratory Report
David, Attached is a revised dioxin report per your request. Thanks *************************************** Scott Unze S pecialty Analytical Project Manager Pace Analytical Services, Inc. Minneapolis, MN (612) 607

- 6383 www.pacelabs.com
Pace Minnesota has transitioned to a paperless reporting system. Reports are available via email or on line through Pace Port . If you have not registered for Pace Port, Pace's on

- line report system, please contact your Project Manager or Sales Representative for details.
>>> Steve Hannan 10/20/2010 9:42 AM >>> >>> "McKeown, David (Columbia) NA" <David.McKeown@hanson.biz> 10/20/2010 9:40 AM >>> Mr. Armstrong: Related to the Hanson Brick Mineral Wells stack test you conducted on August 17

- 19, 2010, Pace Analytical Laboratories will be sending you an addit ional report containing re

- processed data that was requested by the EPA. In addition to the hardcopy report, I have asked that this additional report also be sent via e

- mail to you while copying the EPA and me. I just wanted to make you aware o f this anticipated report and please let me know if you have any further questions.

### Mr. Hannan: Please send an electronic version of the report to the email addresses receiving this message. Thank you. J. David McKeown Lehigh Hanson 5100 Brickyard Road Columbia, SC 29203 Tel: 803 691 3121 Cell: 803 351 0635 Fax: 803 786 9703 David.McKeown@Hanson.BizThis report contains results for EPA Method 23 which is not included in Pace Analytical Service's, Inc. NELAC scope of accreditation This report should not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. The results relate only to the samples included in this report. 

## Report of Laboratory Analysis www.pacelabs.com Pace Analytical Services, Inc. 1700 Elm Street Minneapolis, MN 55414 Phone: 612.607.1700 Fax: 612.607.6444



## Tom Armstrong Armstrong Environmental, Inc. 1748 Hlavek Road Decatur TX 76234



# REPORT OF LABORATORY ANALYSIS FOR PCDD/PCDF

This report has been reviewed by: Invoicing & Reporting Options: 

## Report Information:

Report Prepared Date: October 20, 2010 

### Pace Project #: 10136336 Sample Receipt Date: 08/23/2010 Client Project #: Hansen Brick Client Sub PO #: N/A

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. 

### State Cert #: T104704192-06-TX 

## Report Prepared for:

Page 1 of 17 Report No.....10136336_M23 Revision 1 October 20, 2010 Scott Unze, Project Manager (612) 607-6383 (612) 607-6444 (fax) scott.unze@pacelabs.comPace Analytical Services, Inc. 1700 Elm Street Minneapolis, MN 55414 Phone: 612.607.1700 Fax: 612.607.6444



## REPORT OF LABORATORY ANALYSIS

This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. This report presents the results from the analyses performed on four samples submitted by a representative of Armstrong Environmental, Inc. The samples were analyzed for the presence or absence of polychlorodibenzo-p-dioxins (PCDDs) and polychlorodibenzofurans (PCDFs) using a modified version of USEPA Method 23. This report was revised to include detection limits corresponding to concentrations of 2.5 times the background instrument noise levels. The recoveries of the isotopically labeled PCDD/PCDF internal standards in the sample extracts ranged from 61-87%. All of the labeled internal standard recoveries obtained for this project were within the target ranges for the method. Also, since the internal standards were added to the samples prior to the extraction step, the data were automatically corrected for recovery and accurate values were obtained. The recoveries of the PCDD/PCDF surrogate compounds in the field samples ranged from 85-122%. All of the surrogate recovery values obtained for this project were within the 70-130% target range specified in Method 23. These results indicate that no significant breakthrough occurred during sample collection. 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. 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 contain trace levels of selected congeners. These were below the calibration range of the method. Sample levels similar to the corresponding blank levels were flagged "B" on the results tables and may be, at least partially, attributed to the background. It should be noted that levels less than ten times the background are not generally considered to be statistically different from the background. Laboratory quality control PCDD/PCDF spike samples were also prepared with the sample batch using clean XAD that had been fortified with native standards. The results show that the spiked native compounds were recovered at 86-108%, with relative percent differences of 0.0-5.2%. These results indicate high degrees of accuracy and precision for these determinations. Matrix spikes were not prepared with the sample batch. 

## DISCUSSION

Page 2 of 17 Report No.....10136336_M23 Revision 1

## REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 Tel: 612-607-1700 Fax: 612- 607-6444

Report No.....10136336 

## Minnesota Laboratory Certifications Authority Certificate # Authority Certificate # Alabama 40770 Montana 92 Alaska MN00064 Nebraska Arizona AZ0014 Nevada MN000642010A Arkansas 88-0680 New Jersey (NE MN002 California 01155CA New Mexico MN00064 Colorado MN00064 New York (NEL 11647 Connecticut PH-0256 North Carolina 27700 EPA Region 5 WD-15J North Dakota R-036 EPA Region 8 8TMS-Q Ohio 4150 Florida (NELAP E87605 Ohio VAP CL101 Georgia (DNR) 959 Oklahoma D9922 Guam 09-019r Oregon (ELAP) MN200001-005 Hawaii SLD Oregon (OREL MN200001-005 Idaho MN00064 Pennsylvania 68-00563 Illinois 200012 Saipan MP0003 Indiana C-MN-01 South Carolina 74003001 Indiana C-MN-01 Tennesee 2818 Iowa 368 Tennessee 02818 Kansas E-10167 Texas T104704192-08 Kentucky 90062 Utah (NELAP) PAM Louisiana LA0900016 Virginia 00251 Maine 2007029 Washington C755 Maryland 322 West Virginia 9952C Michigan 9909 Wisconsin 999407970 Minnesota 027-053-137 Wyoming 8TMS-Q Mississippi MN00064



### Page 3 of 17 Report No.....10136336_M23 Revision 1

# Appendix A Sample Management

Pace Analytical Services, Inc. 

### Page 4 of 17 Report No.....10136336_M23 Revision 1Armstrong Environmental, Inc.1748 Hlavek RdDecatur, TX 76234\ \2- l/) 1\50PHONE NO.g - fIOtiliol3632~( 2 1 4. ) \ 6 3 -~ - 0 0 2. .1A-r yv'¡'t§2 ;"K , t1¿fCO/"'l , (Ory¡r~-----_.,--_._-. ..._'-_._------.----_.-l.l~I'~'ln 01 Unit nnd J\~ldior.s: _ .CHAr N OFCUSTODY RECORD---------.----_._---.;....~V's~ ßr1cJ~) M;t1e.~l we1k/T~~ ~Pl-0 t' Tng l'i\J1I1\)urS ~W ~'- C ,!!I-..-..-,-------, -"'--"'--.., '--''''-'-, .-.---'-------- :.~ ïii ~SJ",pl, _ 0", n"" 0,,,, ;110' 01 s"" "" . ~ .jj' ~I'lurnbor SOf1pliid Sil/1ipl()d r r z ü qr r r r' _'_...__.__.................__....2s.'.~-"'-" 'I, ~.'. .- '-'--'--,- ,M() ;- T r.;---C~~ t-i :,~~~:i-'-- 'i .-....r-(~ = _= ... 7~~Ød~..--..,-'--~"t..--..-'-~~,. . . ..----- ,.,;., .~~ ~~~(..._.,_.,.._,I, " jt2lj6;$ 0 ~((1l f.__cl I A~f.", fb -.e .. i/",s.,P""" 'I ,___ _ _.-r,...._-'-, -----..... _....~--. ----....-. --- -----0-__,_. -'i'-'r-ii. i i.' J' -. ( '. (Li ì( lUè!i'c: ' ,3i ~ ii.. 1 Ð ''''-~.e tif"" H'V.o~)( _ _,_--......,--_._--,-,,-. ,-~'5-..-,-_, '---'--'--, '-_, ,.....,____ _.____.___.___ "-1--'1'-' ,.31. "$lrø;'; c;CG F;kr (1 I fe, ~1 t~~ ~ _____~1~C--- .a -', ~- -lij140- ~ --" '1- -- - æl~'l! - i' l), i- 1 fbp -- .-- irri~ __ _ _ __ _ _ ___~____~.l..s c . 'Ll .. v "- I .1-i4: "".,,~_.._: . .--..'1--'--'-1------.._---'--- , -- '--~-35' \ ~¡'JS 'TL; Iii------¡--..--.-- '--'--------~--. :--'--'-lE'-t=:T,-r- -1-1--1---1--'--.-% ~/ig ___ _ G:lo,~ r¡L"' r-iiw . ¡."'~""~ r'._ _________- '~-. .. - - - -_. ------,-- -----..,-.. -'-"-'--_.. .---.....71-....'-.._--..--. --.. '--- --"- ,--, --~ 1 81 I., /Ae-eJ (A-c¿'f.~__ . ... f-" ~~:1' 'i ~----ll.._--....--'- '-..-_...... ".-.._----,. . -- ---- '-- ._-~--- -. -, -- -_. "'- "-- al.)'S ati'l ~ L'_M .. . t!!l '¡(.- ,e'''j( .. \Y ii fk~ ,_._ "_'''_ _,__. _.______.._..,..,___..._,.,_"_,....,------::~=-~~~=-__l~_ ~~ _R~~t :::::~ ~I ~~æD", T,,," n"",,, d by, ISlo"""'''1 ~I .' iii~;,,',b;¡-by~ís~~,~I--- i~~~i. T'","~~;'"'",iI"' I;i~~,lo~~¡~+:~ --():~-I~::-- """~ee --R:-r is -h;--;j;/¡:---IHoniiJrl\s, i. - v - ~e.Dhi"Disliibulion: Oii~)in¡il Accoripanios Sliiprioiil'Copy 10 CliOf1!1Piojccl Co\;,din¡ilor1-=//_



### Page 5 of 17 Report No.....10136336_M23 Revision 1Armstrong Environmental, Inc.1748 Hlavek RdDecatur, TX 76234-- VIa c.\. ~.~ ïiiE.ë':: Q:z 0Tng Nu,iibo,;PHONE NO.. (214)\6~Jl~002-i¿ ~ fvtCill AryVs't-§2;'x, t1¿:h:O,tt'i.. COrn'-____~_ i 01 :J 67;1 k-'_.__'''~'-'._-~--_-:'___.h:____.L t-l ~ l~'~~-U~-'~-~i-Ã~i-~~'~;;---'--~-----CHAIN OFCUSTODY RECORD------~._------_._--;,,(fCVl-50.. ßdck, Mi",L(~1 Wa.llfi )'lSAl1plu Dolo Tirno l) '.1. f S II' oscrip ion 0 ,amp os~~~~:.~~:_, ~:.:!:llP!?~f S(\ri~i:.~~ --___.._______., --, .-;~- --..------..,-.-- ---(....-.1,.._-,,,--1'L -~~ ------- - MD-i- \f':_ . . ( ¡¡''lt.~s:~ _ _ f__ __ -------.' ~ " ~ !tl,er i;--~- ~~.-...-_-_ ýr..S-S t'!. ~ 0 ¡fer _~ ___-"~~ ~.. _ _ _ __ _~_____-ji_ !l~_ ---- -~~~ !M,,ct__ __!__ !~r_ _ '¡ :..._ __ __ ----ltl-,'f2-:I:~ --- ~~. ~~ . - -l --J~~- ~ __ __ _ _ _ ___+__-~L Ja -- -- "'p ---------------_ ___. _ _ ---(-~'t f Li, , t-¡ (fer (La-~ iFf'her . F1C-fr8/ei-v/cY''-"''''''- --. -_., ---"- ._---'-_.._---'------,--- '-"--_. ._-------- --- -- '-, -'---- '- ..-._-----_..........,---.._-----_.---------Honiniks--:----.I-.----~-~---~--~.---------_._ i _'_,.__..--.---..--.-..-----, -,1,-1'__. __,_ ..___.__ .____.___..___.._.____.._....._-----------------'-"-:--'.I'--_.--~-._.._-"-~-'---i/--.I__hl:__~' __.__. ___.-- ,.__. ._-----..-._--._----~----"-"-~.'---1'--_._--.. _.._,. __ ,__, ,..._,..__. ______.._..,__,_______,_"JI.~liY:i~o~~---I-~: T;m':~~r"'.';í~;.~~¡:i. --o':;-i::-- """"'~~;--¡~~h -~~-~;~O-----'i.... ..,... -......,..,_.---..,c-....-,.._'-'..,~L..l;;1Disliibuliori: Oiiuin¡ill\ccoriipaiiios Ship!1olit.COPY'IO CliOllllProjeGl Coordinator



### Page 6 of 17 Report No.....10136336_M23 Revision 1

# ßAnO Client Name: A rmstr o~ r n v: f\.. ..I Project #
c:"" Lex 0 lJS 0 USPS 0 Cllont 0 Comm_ 0 Pa Oter 

# Tracking## ~,)blloI9) D'Sir:/3buJr32-ì;C¿f( / Custod Sel on ColerlBox Prent: GÍ yes 0 no Seals Intact: i! yes Packing Material: 0 Bubble Wrap ~bble Bas 0 Nons 0 Oter Thermometer Use 802 or ~ Type of loe~ Blue Noe 

## Coer Temperature \ ,k BlologlOlI Tlnue I. Frozen: Ves No 

# Temp should be above freezing to 6°C Comment.: Sample Condition Upon Receipt 

# j¿)1l7t(.S7h

o no 

## Temp Blank: Yes -L No o Sam les on Ice, colin ocess has begun Date and Inillal, 01 ~.fn examflng 

### contente: 9.B:¥L ¡USb~



# oc
Corret Contaners Used: .Pace Containers Used: Contaners Intact:
Filered volume received for Disslved tests , Sample Lals match COC: .Includes dateltlmellD/Anal sls Matrix: All contaners needing ac di preervation have been checked. Noncomollanc are noted In 13. All contalnera neing prervation are found to be In Dves DNo compliance wih EPA remmendaon. Excepllon: VOA,Colfor, TOC. 011 and Greas, WI-OAO (wele( Dves SC Dves DNo DVee DNo Dves DNo Dves DNo 

### o HN03 0 H2SO4 0 NaOH o Hei

Lot # of added 

### preservtie

Client Notificaion! ReslutIon: Persn Contacted: Comments! Resolution: Field Data Required? 

### Y I N DatelTme:

Proec Manager Review: 

# ß Date: l)gtp 3 / tV

Note: Whenever there is a disrepancy affting Nort Carolina compliance samples, a copy of this form will be sent to thJNl- SI, Inc. 

# F-L213Rev.OO.05Aug200 1700 Elm Strt SE, Suite 200, Minneapolis, MN 55414 Page 7 of 17 Report No.....10136336_M23 Revision 1

## REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 Tel: 612-607-1700 Fax: 612- 607-6444

Report No.....10136336 

# Reporting Flags

A = B = C = D = E = I = J = Nn = P = R = S = U = V = X = Y = * = Reporting Limit based on signal to noise Less than 10x higher than method blank level Result obtained from confirmation analysis Result obtained from analysis of diluted sample Exceeds calibration range Interference present Estimated value Value obtained from additional analysis PCDE Interference Recovery outside target range Peak saturated Analyte not detected Result verified by confirmation analysis %D Exceeds limits Calculated using average of daily RFs See Discussion

Page 8 of 17 Report No.....10136336_M23 Revision 1

# Appendix B Sample Analysis Summary

Pace Analytical Services, Inc. 

### Page 9 of 17 Report No.....10136336_M23 Revision 1

## REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 Tel: 612-607-1700 Fax: 612- 607-6444

Lab Sample ID Injected By Filename Amount Extracted ICAL ID CCal Filename(s) Method Blank ID Client's Sample ID Hansen R7 10136336001 U100902A_09 SMT 1.00 Sample U100607 U100902A_02 BLANK-26210 Matrix Dilution Collected Received Extracted Analyzed XAD

NA 08/18/2010 08/23/2010 09:30 08/26/2010 19:30 09/02/2010 17:42 Client - Armstrong Environmental, Inc. 

### Method 23 Sample Analysis Results

Native Isomers Conc ng/S ng/S

LRL Internal

Standards Added ng's Percent

Recovery EMPC ng/S 2,3,7,8-TCDF ND 0.0041 2,3,7,8-TCDF-13C 2.00 71
----- Total TCDF 0.0470 0.0041 2,3,7,8-TCDD-13C 2.00 80
----- 1,2,3,7,8-PeCDF-13C 2.00 77 2,3,7,8-TCDD 0.0054 0.0033 1,2,3,7,8-PeCDD-13C 2.00 84 J
----- Total TCDD 0.0460 0.0033 1,2,3,6,7,8-HxCDF-13C 2.00 65 J
----- 1,2,3,6,7,8-HxCDD-13C 2.00 81 1,2,3,7,8-PeCDF ND 0.0046 1,2,3,4,6,7,8-HpCDF-13C 2.00 87
----- 2,3,4,7,8-PeCDF ND 0.0039 1,2,3,4,6,7,8-HpCDD-13C 2.00 78
----- Total PeCDF ND 0.0042 OCDD-13C 4.00 72
----- 1,2,3,7,8-PeCDD ND 0.0073 Recovery
----- Total PeCDD 0.1100 0.0073 Standards
----- 1,2,3,4-TCDD-13C 2.00 NA 1,2,3,4,7,8-HxCDF ND 0.0055 1,2,3,7,8,9-HxCDD-13C 2.00 NA
----- 1,2,3,6,7,8-HxCDF ND 0.0043
----- 2,3,4,6,7,8-HxCDF 0.0065 0.0053 Surrogates J
----- 1,2,3,7,8,9-HxCDF ND 0.0054 2,3,7,8-TCDD-37Cl4 2.00 100
----- Total HxCDF 0.0065 0.0051 2,3,4,7,8-PeCDF-13C 2.00 95 J
----- 1,2,3,4,7,8-HxCDF-13C 2.00 100 1,2,3,4,7,8-HxCDD ND 0.0060 1,2,3,4,7,8-HxCDD-13C 2.00 114
----- 1,2,3,6,7,8-HxCDD
----- 0.0053 1,2,3,4,7,8,9-HpCDF-13C 2.00 91 I 0.0071 1,2,3,7,8,9-HxCDD ND 0.0045
----- Total HxCDD ND 0.0053
----- 1,2,3,4,6,7,8-HpCDF ND 0.0037 Total 2,3,7,8-TCDD
----- 1,2,3,4,7,8,9-HpCDF ND 0.0073 Equivalence: 0.0063 ng/S
----- Total HpCDF ND 0.0055 (Using ITE Factors)
----- 1,2,3,4,6,7,8-HpCDD 0.0160 0.0038 BJ
----- Total HpCDD 0.0390 0.0038 BJ
----- OCDF ND 0.0046
----- OCDD 0.0880 0.0051 BJ
----- Conc = Concentration (Totals include 2,3,7,8-substituted isomers). EMPC = Estimated Maximum Possible Concentration LRL = Lower Reporting Limit J = Estimated value B = Less than 10 times higher than method blank level R = Recovery outside of target range Nn = Value obtained from additional analysis A = Detection Limit based on signal to noise I = Interference P = PCDE Interference S = Saturated signal ND = Not Detected NA = Not Applicable NC = Not Calculated



### Page 10 of 17 Report No.....10136336_M23 Revision 1

## REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 Tel: 612-607-1700 Fax: 612- 607-6444

Lab Sample ID Injected By Filename Amount Extracted ICAL ID CCal Filename(s) Method Blank ID Client's Sample ID Hansen R8 10136336002 U100902A_10 SMT 1.00 Sample U100607 U100902A_02 BLANK-26210 Matrix Dilution Collected Received Extracted Analyzed XAD

NA 08/18/2010 08/23/2010 09:30 08/26/2010 19:30 09/02/2010 18:29 Client - Armstrong Environmental, Inc. 

### Method 23 Sample Analysis Results

Native Isomers Conc ng/S ng/S

LRL Internal

Standards Added ng's Percent

Recovery EMPC ng/S 2,3,7,8-TCDF ND 0.0034 2,3,7,8-TCDF-13C 2.00 75
----- Total TCDF 0.0940 0.0034 2,3,7,8-TCDD-13C 2.00 80
----- 1,2,3,7,8-PeCDF-13C 2.00 82 2,3,7,8-TCDD
----- 0.0044 1,2,3,7,8-PeCDD-13C 2.00 86 I 0.0058 Total TCDD 0.0420 0.0044 1,2,3,6,7,8-HxCDF-13C 2.00 69
----- 1,2,3,6,7,8-HxCDD-13C 2.00 78 1,2,3,7,8-PeCDF ND 0.0051 1,2,3,4,6,7,8-HpCDF-13C 2.00 85
----- 2,3,4,7,8-PeCDF ND 0.0054 1,2,3,4,6,7,8-HpCDD-13C 2.00 72
----- Total PeCDF 0.0220 0.0052 OCDD-13C 4.00 68 J
----- 1,2,3,7,8-PeCDD ND 0.0097 Recovery
----- Total PeCDD 0.1900 0.0097 Standards
----- 1,2,3,4-TCDD-13C 2.00 NA 1,2,3,4,7,8-HxCDF 0.0062 0.0051 1,2,3,7,8,9-HxCDD-13C 2.00 NA J
----- 1,2,3,6,7,8-HxCDF
----- 0.0042 P 0.0110 2,3,4,6,7,8-HxCDF ND 0.0046 Surrogates
----- 1,2,3,7,8,9-HxCDF ND 0.0045 2,3,7,8-TCDD-37Cl4 2.00 96
----- Total HxCDF 0.0200 0.0046 2,3,4,7,8-PeCDF-13C 2.00 93 J
----- 1,2,3,4,7,8-HxCDF-13C 2.00 96 1,2,3,4,7,8-HxCDD
----- 0.0079 1,2,3,4,7,8-HxCDD-13C 2.00 117 I 0.0080 1,2,3,6,7,8-HxCDD ND 0.0074 1,2,3,4,7,8,9-HpCDF-13C 2.00 85
----- 1,2,3,7,8,9-HxCDD
----- 0.0072 I 0.0073 Total HxCDD ND 0.0075
----- 1,2,3,4,6,7,8-HpCDF
----- 0.0095 Total 2,3,7,8-TCDD I 0.0110 1,2,3,4,7,8,9-HpCDF ND 0.0130 Equivalence: 0.0015 ng/S
----- Total HpCDF ND 0.0110 (Using ITE Factors)
----- 1,2,3,4,6,7,8-HpCDD 0.0510 0.0045 B
----- Total HpCDD 0.1500 0.0045
----- OCDF 0.0110 0.0052 J
----- OCDD 0.3100 0.0110 B
----- Conc = Concentration (Totals include 2,3,7,8-substituted isomers). EMPC = Estimated Maximum Possible Concentration LRL = Lower Reporting Limit J = Estimated value B = Less than 10 times higher than method blank level R = Recovery outside of target range Nn = Value obtained from additional analysis A = Detection Limit based on signal to noise I = Interference P = PCDE Interference S = Saturated signal ND = Not Detected NA = Not Applicable NC = Not Calculated



### Page 11 of 17 Report No.....10136336_M23 Revision 1

## REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 Tel: 612-607-1700 Fax: 612- 607-6444

Lab Sample ID Injected By Filename Amount Extracted ICAL ID CCal Filename(s) Method Blank ID Client's Sample ID Hansen R9 10136336003 U100902A_11 SMT 1.00 Sample U100607 U100902A_02 BLANK-26210 Matrix Dilution Collected Received Extracted Analyzed XAD

NA 08/19/2010 08/23/2010 09:30 08/26/2010 19:30 09/02/2010 19:16 Client - Armstrong Environmental, Inc. 

### Method 23 Sample Analysis Results

Native Isomers Conc ng/S ng/S

LRL Internal

Standards Added ng's Percent

Recovery EMPC ng/S 2,3,7,8-TCDF ND 0.0060 2,3,7,8-TCDF-13C 2.00 61
----- Total TCDF 0.088 0.0060 2,3,7,8-TCDD-13C 2.00 74
----- 1,2,3,7,8-PeCDF-13C 2.00 79 2,3,7,8-TCDD
----- 0.0037 1,2,3,7,8-PeCDD-13C 2.00 86 I 0.0061 Total TCDD 0.013 0.0037 1,2,3,6,7,8-HxCDF-13C 2.00 67 J
----- 1,2,3,6,7,8-HxCDD-13C 2.00 79 1,2,3,7,8-PeCDF ND 0.0055 1,2,3,4,6,7,8-HpCDF-13C 2.00 83
----- 2,3,4,7,8-PeCDF ND 0.0054 1,2,3,4,6,7,8-HpCDD-13C 2.00 76
----- Total PeCDF ND 0.0055 OCDD-13C 4.00 64
----- 1,2,3,7,8-PeCDD ND 0.0065 Recovery
----- Total PeCDD 0.088 0.0065 Standards J
----- 1,2,3,4-TCDD-13C 2.00 NA 1,2,3,4,7,8-HxCDF ND 0.0075 1,2,3,7,8,9-HxCDD-13C 2.00 NA
----- 1,2,3,6,7,8-HxCDF
----- 0.0058 I 0.0068 2,3,4,6,7,8-HxCDF
----- 0.0050 Surrogates I 0.0069 1,2,3,7,8,9-HxCDF ND 0.0064 2,3,7,8-TCDD-37Cl4 2.00 101
----- Total HxCDF ND 0.0061 2,3,4,7,8-PeCDF-13C 2.00 102
----- 1,2,3,4,7,8-HxCDF-13C 2.00 104 1,2,3,4,7,8-HxCDD ND 0.0092 1,2,3,4,7,8-HxCDD-13C 2.00 122
----- 1,2,3,6,7,8-HxCDD ND 0.0082 1,2,3,4,7,8,9-HpCDF-13C 2.00 96
----- 1,2,3,7,8,9-HxCDD ND 0.0075
----- Total HxCDD ND 0.0083
----- 1,2,3,4,6,7,8-HpCDF ND 0.0074 Total 2,3,7,8-TCDD
----- 1,2,3,4,7,8,9-HpCDF ND 0.0095 Equivalence: 0.00037 ng/S
----- Total HpCDF ND 0.0084 (Using ITE Factors)
----- 1,2,3,4,6,7,8-HpCDD 0.021 0.0074 BJ
----- Total HpCDD 0.052 0.0074 BJ
----- OCDF ND 0.0065
----- OCDD 0.150 0.0070 B
----- Conc = Concentration (Totals include 2,3,7,8-substituted isomers). EMPC = Estimated Maximum Possible Concentration LRL = Lower Reporting Limit J = Estimated value B = Less than 10 times higher than method blank level R = Recovery outside of target range Nn = Value obtained from additional analysis A = Detection Limit based on signal to noise I = Interference P = PCDE Interference S = Saturated signal ND = Not Detected NA = Not Applicable NC = Not Calculated



### Page 12 of 17 Report No.....10136336_M23 Revision 1

## REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 Tel: 612-607-1700 Fax: 612- 607-6444

Lab Sample ID Injected By Filename Amount Extracted ICAL ID CCal Filename(s) Method Blank ID Client's Sample ID Field Blank 10136336004 U100902A_07 SMT 1.00 Sample U100607 U100902A_02 BLANK-26210 Matrix Dilution Collected Received Extracted Analyzed XAD

NA 08/19/2010 08/23/2010 09:30 08/26/2010 19:30 09/02/2010 16:08 Client - Armstrong Environmental, Inc. 

### Method 23 Sample Analysis Results

Native Isomers Conc ng/S ng/S

LRL Internal

Standards Added ng's Percent

Recovery EMPC ng/S 2,3,7,8-TCDF ND 0.0029 2,3,7,8-TCDF-13C 2.00 71
----- Total TCDF ND 0.0029 2,3,7,8-TCDD-13C 2.00 82
----- 1,2,3,7,8-PeCDF-13C 2.00 75 2,3,7,8-TCDD ND 0.0025 1,2,3,7,8-PeCDD-13C 2.00 82
----- Total TCDD ND 0.0025 1,2,3,6,7,8-HxCDF-13C 2.00 66
----- 1,2,3,6,7,8-HxCDD-13C 2.00 84 1,2,3,7,8-PeCDF ND 0.0045 1,2,3,4,6,7,8-HpCDF-13C 2.00 86
----- 2,3,4,7,8-PeCDF ND 0.0041 1,2,3,4,6,7,8-HpCDD-13C 2.00 78
----- Total PeCDF ND 0.0043 OCDD-13C 4.00 69
----- 1,2,3,7,8-PeCDD ND 0.0049 Recovery
----- Total PeCDD ND 0.0049 Standards
----- 1,2,3,4-TCDD-13C 2.00 NA 1,2,3,4,7,8-HxCDF ND 0.0035 1,2,3,7,8,9-HxCDD-13C 2.00 NA
----- 1,2,3,6,7,8-HxCDF ND 0.0034
----- 2,3,4,6,7,8-HxCDF ND 0.0039 Surrogates
----- 1,2,3,7,8,9-HxCDF ND 0.0046 2,3,7,8-TCDD-37Cl4 2.00 103
----- Total HxCDF ND 0.0038 2,3,4,7,8-PeCDF-13C 2.00 96
----- 1,2,3,4,7,8-HxCDF-13C 2.00 99 1,2,3,4,7,8-HxCDD ND 0.0039 1,2,3,4,7,8-HxCDD-13C 2.00 112
----- 1,2,3,6,7,8-HxCDD ND 0.0036 1,2,3,4,7,8,9-HpCDF-13C 2.00 91
----- 1,2,3,7,8,9-HxCDD ND 0.0031
----- Total HxCDD ND 0.0035
----- 1,2,3,4,6,7,8-HpCDF ND 0.0042 Total 2,3,7,8-TCDD
----- 1,2,3,4,7,8,9-HpCDF ND 0.0044 Equivalence: 0.000065 ng/S
----- Total HpCDF ND 0.0043 (Using ITE Factors)
----- 1,2,3,4,6,7,8-HpCDD 0.0047 0.0036 BJ
----- Total HpCDD 0.0047 0.0036 BJ
----- OCDF
----- 0.0034 I 0.0038 OCDD 0.0190 0.0039 BJ
----- Conc = Concentration (Totals include 2,3,7,8-substituted isomers). EMPC = Estimated Maximum Possible Concentration LRL = Lower Reporting Limit J = Estimated value B = Less than 10 times higher than method blank level R = Recovery outside of target range Nn = Value obtained from additional analysis A = Detection Limit based on signal to noise I = Interference P = PCDE Interference S = Saturated signal ND = Not Detected NA = Not Applicable NC = Not Calculated



### Page 13 of 17 Report No.....10136336_M23 Revision 1

## REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 Tel: 612-607-1700 Fax: 612- 607-6444

Lab Sample ID
Injected By Filename Amount Extracted ICAL ID CCal Filename(s) BLANK-26210 U100902A_08
SMT 1.00 Sample U100607 U100902A_02 Matrix Dilution Extracted Analyzed XAD

08/26/2010 19:30 09/02/2010 16:55 NA 

### Method 23 Blank Analysis Results

Native Internal ng's Percent Recovery Isomers Standards Added Conc EMPC LRL

ng/S ng/S ng/S 2,3,7,8-TCDF 2,3,7,8-TCDF-13C 2.00 78 ND
----- 0.0018 Total TCDF 2,3,7,8-TCDD-13C 2.00 87 ND
----- 0.0018 1,2,3,7,8-PeCDF-13C 2.00 82 2,3,7,8-TCDD 1,2,3,7,8-PeCDD-13C 2.00 93 ND
----- 0.0024 Total TCDD 1,2,3,6,7,8-HxCDF-13C 2.00 75 ND
----- 0.0024 1,2,3,6,7,8-HxCDD-13C 2.00 96 1,2,3,7,8-PeCDF 1,2,3,4,6,7,8-HpCDF-13C 2.00 103 ND
----- 0.0053 2,3,4,7,8-PeCDF 1,2,3,4,6,7,8-HpCDD-13C 2.00 93 ND
----- 0.0053 Total PeCDF OCDD-13C 4.00 86 ND
----- 0.0053 1,2,3,7,8-PeCDD Recovery ND
----- 0.0074 Total PeCDD Standards ND
----- 0.0074 1,2,3,4-TCDD-13C 2.00 NA 1,2,3,4,7,8-HxCDF 1,2,3,7,8,9-HxCDD-13C 2.00 NA ND
----- 0.0036 1,2,3,6,7,8-HxCDF ND
----- 0.0029 2,3,4,6,7,8-HxCDF Surrogates ND
----- 0.0040 1,2,3,7,8,9-HxCDF 2,3,7,8-TCDD-37Cl4 2.00 106 ND
----- 0.0046 Total HxCDF 2,3,4,7,8-PeCDF-13C 2.00 100 ND
----- 0.0038 1,2,3,4,7,8-HxCDF-13C 2.00 101 1,2,3,4,7,8-HxCDD 1,2,3,4,7,8-HxCDD-13C 2.00 118 ND
----- 0.0037 1,2,3,6,7,8-HxCDD 1,2,3,4,7,8,9-HpCDF-13C 2.00 94 ND
----- 0.0029 1,2,3,7,8,9-HxCDD ND
----- 0.0026 Total HxCDD ND
----- 0.0031 1,2,3,4,6,7,8-HpCDF Total 2,3,7,8-TCDD ND
----- 0.0020 1,2,3,4,7,8,9-HpCDF Equivalence: 0.00015 ng/S ND
----- 0.0024 Total HpCDF (Using ITE Factors) ND
----- 0.0022 1,2,3,4,6,7,8-HpCDD 0.0077
----- 0.0032 J Total HpCDD 0.0130
----- 0.0032 J OCDF
----- 0.0055 0.0030 I OCDD 0.0750
----- 0.0034 J Conc = Concentration (Totals include 2,3,7,8-substituted isomers). EMPC = Estimated Maximum Possible Concentration LRL = Lower Reporting Limit J = Estimated value Nn = Value obtained from additional analysis A = Detection Limit based on signal to noise R = Recovery outside of target range I = Interference P = PCDE Interference ND = Not Detected NA = Not Applicable NC = Not Calculated



### Page 14 of 17 Report No.....10136336_M23 Revision 1

## REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 Tel: 612-607-1700 Fax: 612- 607-6444

Lab Sample ID

Injected By Filename Total Amount Extracted ICAL ID CCal Filename(s) LCS-26211 U100902A_04

SMT 1.00 Sample U100607 U100902A_02 Matrix Dilution Extracted Analyzed XAD

08/26/2010 19:30 09/02/2010 13:48 NA
Method Blank ID BLANK-26210 

### Method 23 Laboratory Control Spike Results

Native Qs Qm Internal ng's Percent Recovery Isomers Standards Added % Rec. (ng) (ng) 2,3,7,8-TCDF 0.20 0.19 2,3,7,8-TCDF-13C 2.0 71 97 Total TCDF 2,3,7,8-TCDD-13C 2.0 78 1,2,3,7,8-PeCDF-13C 2.0 76 2,3,7,8-TCDD 0.20 0.19 1,2,3,7,8-PeCDD-13C 2.0 85 95 Total TCDD 1,2,3,6,7,8-HxCDF-13C 2.0 69 1,2,3,6,7,8-HxCDD-13C 2.0 90 1,2,3,7,8-PeCDF 1.0 0.93 1,2,3,4,6,7,8-HpCDF-13C 2.0 91 93 2,3,4,7,8-PeCDF 1.0 0.90 1,2,3,4,6,7,8-HpCDD-13C 2.0 82 90 Total PeCDF OCDD-13C 4.0 78 1,2,3,7,8-PeCDD 1.0 0.95 Recovery 95 Total PeCDD Standards 1,2,3,4-TCDD-13C 2.0 NA 1,2,3,4,7,8-HxCDF 1.0 1.1 1,2,3,7,8,9-HxCDD-13C 2.0 NA 107 1,2,3,6,7,8-HxCDF 1.0 0.96 96 2,3,4,6,7,8-HxCDF 1.0 1.1 Surrogates 107 1,2,3,7,8,9-HxCDF 1.0 1.0 2,3,7,8-TCDD-37Cl4 2.0 109 101 Total HxCDF 2,3,4,7,8-PeCDF-13C 2.0 101 1,2,3,4,7,8-HxCDF-13C 2.0 105 1,2,3,4,7,8-HxCDD 1.0 1.0 1,2,3,4,7,8-HxCDD-13C 2.0 112 100 1,2,3,6,7,8-HxCDD 1.0 0.92 1,2,3,4,7,8,9-HpCDF-13C 2.0 94 92 1,2,3,7,8,9-HxCDD 1.0 0.86 86 Total HxCDD 1,2,3,4,6,7,8-HpCDF 1.0 1.0 102 1,2,3,4,7,8,9-HpCDF 1.0 0.97 97 Total HpCDF 1,2,3,4,6,7,8-HpCDD 1.0 0.99 99 Total HpCDD OCDF 2.0 1.9 96 OCDD 2.0 2.2 108 Qs = Quantity Spiked Qm = Quantity Measured Rec. = Recovery (Expressed as Percent) R = Outside the method specified target recovery range NA = Not Applicable Nn = Value obtained from additional analysis



### Page 15 of 17 Report No.....10136336_M23 Revision 1

## REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 Tel: 612-607-1700 Fax: 612- 607-6444

Lab Sample ID

Injected By Filename Total Amount Extracted ICAL ID CCal Filename(s) LCSD-26212 U100903A_03

CVS 1.00 Sample U100607 U100903A_02 Matrix Dilution Extracted Analyzed XAD

08/26/2010 19:30 09/03/2010 14:23 NA
Method Blank ID BLANK-26210 

### Method 23 Laboratory Control Spike Results

Native Qs Qm Internal ng's Percent Recovery Isomers Standards Added % Rec. (ng) (ng) 2,3,7,8-TCDF 0.20 0.19 2,3,7,8-TCDF-13C 2.0 68 94 Total TCDF 2,3,7,8-TCDD-13C 2.0 79 1,2,3,7,8-PeCDF-13C 2.0 70 2,3,7,8-TCDD 0.20 0.19 1,2,3,7,8-PeCDD-13C 2.0 80 93 Total TCDD 1,2,3,6,7,8-HxCDF-13C 2.0 66 1,2,3,6,7,8-HxCDD-13C 2.0 87 1,2,3,7,8-PeCDF 1.0 0.90 1,2,3,4,6,7,8-HpCDF-13C 2.0 94 90 2,3,4,7,8-PeCDF 1.0 0.87 1,2,3,4,6,7,8-HpCDD-13C 2.0 86 87 Total PeCDF OCDD-13C 4.0 76 1,2,3,7,8-PeCDD 1.0 0.92 Recovery 92 Total PeCDD Standards 1,2,3,4-TCDD-13C 2.0 NA 1,2,3,4,7,8-HxCDF 1.0 1.0 1,2,3,7,8,9-HxCDD-13C 2.0 NA 103 1,2,3,6,7,8-HxCDF 1.0 0.97 97 2,3,4,6,7,8-HxCDF 1.0 1.0 Surrogates 103 1,2,3,7,8,9-HxCDF 1.0 0.97 2,3,7,8-TCDD-37Cl4 2.0 105 97 Total HxCDF 2,3,4,7,8-PeCDF-13C 2.0 101 1,2,3,4,7,8-HxCDF-13C 2.0 103 1,2,3,4,7,8-HxCDD 1.0 0.98 1,2,3,4,7,8-HxCDD-13C 2.0 117 98 1,2,3,6,7,8-HxCDD 1.0 0.92 1,2,3,4,7,8,9-HpCDF-13C 2.0 94 92 1,2,3,7,8,9-HxCDD 1.0 0.86 86 Total HxCDD 1,2,3,4,6,7,8-HpCDF 1.0 0.99 99 1,2,3,4,7,8,9-HpCDF 1.0 0.93 93 Total HpCDF 1,2,3,4,6,7,8-HpCDD 1.0 0.94 94 Total HpCDD OCDF 2.0 1.9 93 OCDD 2.0 2.1 104 Qs = Quantity Spiked Qm = Quantity Measured Rec. = Recovery (Expressed as Percent) R = Outside the method specified target recovery range NA = Not Applicable Nn = Value obtained from additional analysis



### Page 16 of 17 Report No.....10136336_M23 Revision 1

## REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 Tel: 612-607-1700 Fax: 612- 607-6444

Client Spike 1 ID Spike 1 Filename U100902A_04 LCS-26211 Armstrong Environmental, Inc. 

### Spike Recovery Relative Percent Difference (RPD) Results

Spike 2 ID Spike 2 Filename U100903A_03 LCSD-26212 

### Method 23

Spike 1 Spike 2 Compound %REC %REC %RPD 2,3,7,8-TCDF 97 94 3.1 2,3,7,8-TCDD 95 93 2.1 1,2,3,7,8-PeCDF 93 90 3.3 2,3,4,7,8-PeCDF 90 87 3.4 1,2,3,7,8-PeCDD 95 92 3.2 1,2,3,4,7,8-HxCDF 107 103 3.8 1,2,3,6,7,8-HxCDF 96 97 1.0 2,3,4,6,7,8-HxCDF 107 103 3.8 1,2,3,7,8,9-HxCDF 101 97 4.0 1,2,3,4,7,8-HxCDD 100 98 2.0 1,2,3,6,7,8-HxCDD 92 92 0.0 1,2,3,7,8,9-HxCDD 86 86 0.0 1,2,3,4,6,7,8-HpCDF 102 99 3.0 1,2,3,4,7,8,9-HpCDF 97 93 4.2 1,2,3,4,6,7,8-HpCDD 99 94 5.2 OCDF 96 93 3.2 OCDD 108 104 3.8
%REC = Percent Recovered RPD = The difference between the two values divided by the mean value



### Page 17 of 17 Report No.....10136336_M23 Revision 1