TABLE 1WASTE DELISTING VERIFICATION SAMPLING RESULTS (FILTER CAKE SAMPLE DATA)JOHN DEERE DES MOINES WORKS - ANKENY, IOWASample IDSample DateLaboratory IDAnalytes UnitsMinimum Maximum Minimum MaximumMetals (Total)Antimony mg/kg 103 NA NA <36.6 57.2 NA NA <36.6 <37.6 NA NA NAArsenic mg/kg 52 NA NA <18.8 <42.6 NA NA <18.3 <18.8 NA NA NABarium mg/kg 965 322 643 407 497 NA NA 407 443 NA NA NABeryllium mg/kg 21 NA NA <1.47 <17.0 NA NA <1.47 <1.50 NA NA NACadmium mg/kg 10 NA NA 1.37 <8.51 NA NA 1.37 B 1.44 B NA NA NAChromium (total) mg/kg 22,500 8,710 15,000 5,150 12,200 NA NA 5,150 5150 NA NA NAHexavalent Chromium mg/kg 20 <3.33 13.6 <3.71 13.1 NA NA <3.71 <3.78 NA NA NACobalt mg/kg 11 NA NA 5.60 7.02 NA NA 5.60 5.90 NA NA NACopper mg/kg 1439 278 959 279 302 NA NA 281 279 NA NA NALead mg/kg 437 165 291 143 303 NA NA 253 303 NA NA NAMercury mg/kg 1 0.116 0.635 0.0979 0.174 NA NA 0.169 0.174 NA NA NANickel mg/kg 1515 70.2 1010 46.7 63.2 NA NA 55.7 63.2 NA NA NASelenium mg/kg 52 NA NA <3.66 <42.6 NA NA <3.66 <3.76 NA NA NASilver mg/kg 26 NA NA 0.884 5.24 NA NA 0.884 J 0.918 J NA NA NAThallium mg/kg 52 NA NA <3.66 <42.6 NA NA <3.66 <3.76 NA NA NATin mg/kg 68 NA NA132 535NA NA132B149B NA NA NAVanadium mg/kg 380 24.8 253 12.8 202 NA NA 12.8 12.9 NA NA NAZinc mg/kg 5,085 346 3,390 895 981 NA NA 895 B 981 B NA NA NAMetals TCLP (Method 1311)Arsenic mg/L 5.0 NA NA <0.0500 <0.0500 NA NA <0.0500 <0.0500 NA NA NABarium mg/L 100.0 0.0 <0.500 <0.500 <0.500 NA NA <0.500 <0.500 NA NA NACadmium mg/L 1.0 NA NA <0.00500 <0.00500 NA NA <0.00500 ^ <0.00500 ^ NA NA NAChromium mg/L 5.0 0.0120 0.8 <0.0250 <0.0250 NA NA <0.0250 <0.0250 NA NA NALead mg/L 5.0 <0.0500 <0.0500 <0.0500 <0.0500 NA NA <0.0500 <0.0500 NA NA NAMercury mg/L 0.2 0.0000559 <0.00020 <0.00020 <0.00020 NA NA <0.00020 <0.00020 NA NA NANickel mg/L 32.4 0.0461 0.744 0.0269 0.0358 NA NA 0.0358 0.0334 NA NA NAGeneral ChemistryIgnitabilityDegrees F 140>176 >176>176 >176NANA>176>176NANANACyanide (Total)mg/kg30.613 <2.041.49 <2.21NANA1.49 J,B1.55 J,BNANANASulfidemg/kg--166817398636NANA636595NANANASulfide, Reactivemg/kg--<47.0 <49.3 <48.6 <50.0NANA<49.7<48.6NANANApHSU2and <12.59.029.878.278.37NANA8.278.27NANANAOil & Greasemg/kg 32,2506,920 21,500 4,150 21,400NANA10,70021,400NANANATotal Solids%--2726Volatile Organic CompoundsAcetone mg/kg 8 2.390 9.13 4.42 6.890 4.42 5.71 NA NA NA NA NAMethyl ethyl ketone mg/kg 0.3 0.0118 0.191 <2.250 0.2380.3140.238NANANANANAMetal (Method 1313)Hexavalent Chromium mg/L 0.087NANA 0.002340.157NANANANA<0.01000.00234 J<0.0100pH (Method 1313 Target) SU--NANA72.88NANANANA2.88713Dataset Before FinalExclusion (Initial Event 2011and 6 Events in 2012)EPA DelistingLevelsaDataset After Final Exclusion(Verification Events2014/2015)VS Event 1Composite 112/17/2014500-89685-3VS Event 1Composite 112/17/2014500-89685-19VS Event 1Composite 1D12/17/2014500-89685-4VS Event 1Composite 112/17/2014500-89685-17VS Event 1Composite 112/17/2014500-89685-3VS Event 1Discrete 112/17/2014500-89685-1VS Event 1Discrete 1D12/17/2014500-89685-2Page 1 of 2TABLE 1WASTE DELISTING VERIFICATION SAMPLING RESULTS (FILTER CAKE SAMPLE DATA)JOHN DEERE DES MOINES WORKS - ANKENY, IOWASample IDSample DateLaboratory IDAnalytes UnitsMinimum Maximum Minimum MaximumMetals (Total)Antimony mg/kg 103 NA NA <36.6 57.2Arsenic mg/kg 52 NA NA <18.8 <42.6Barium mg/kg 965 322 643 407 497Beryllium mg/kg 21 NA NA <1.47 <17.0Cadmium mg/kg 10 NA NA 1.37 <8.51Chromium (total) mg/kg 22,500 8,710 15,000 5,150 12,200Hexavalent Chromium mg/kg 20 <3.33 13.6 <3.71 13.1Cobalt mg/kg 11 NA NA 5.60 7.02Copper mg/kg 1439 278 959 279 302Lead mg/kg 437 165 291 143 303Mercury mg/kg 1 0.116 0.635 0.0979 0.174Nickel mg/kg 1515 70.2 1010 46.7 63.2Selenium mg/kg 52 NA NA <3.66 <42.6Silver mg/kg 26 NA NA 0.884 5.24Thallium mg/kg 52 NA NA <3.66 <42.6Tin mg/kg 68 NA NA132 535Vanadium mg/kg 380 24.8 253 12.8 202Zinc mg/kg 5,085 346 3,390 895 981Metals TCLP (Method 1311)Arsenic mg/L 5.0 NA NA <0.0500 <0.0500Barium mg/L 100.0 0.0 <0.500 <0.500 <0.500Cadmium mg/L 1.0 NA NA <0.00500 <0.00500Chromium mg/L 5.0 0.0120 0.8 <0.0250 <0.0250Lead mg/L 5.0 <0.0500 <0.0500 <0.0500 <0.0500Mercury mg/L 0.2 0.0000559 <0.00020 <0.00020 <0.00020Nickel mg/L 32.4 0.0461 0.744 0.0269 0.0358General ChemistryIgnitabilityDegrees F 140>176 >176>176 >176Cyanide (Total)mg/kg30.613 <2.041.49 <2.21Sulfidemg/kg--166817398636Sulfide, Reactivemg/kg--<47.0 <49.3 <48.6 <50.0pHSU2and <12.59.029.878.278.37Oil & Greasemg/kg 32,2506,920 21,500 4,150 21,400Total Solids%--Volatile Organic CompoundsAcetonemg/kg82.3909.134.42 6.890Methyl ethyl ketonemg/kg0.30.0118 0.191 <2.250 0.238Metal (Method 1313)Hexavalent Chromium mg/L 0.087NANA 0.002340.157pH (Method 1313 Target) SU--NANA72.88Dataset Before FinalExclusion (Initial Event 2011and 6 Events in 2012)EPA DelistingLevelsaDataset After Final Exclusion(Verification Events2014/2015)NA57.2 JNANANANA<42.6NANANANA497NANANANA<17.0NANANANA<8.51NANANANA12,200NANANANA13.1NANANANA7.02 JNANANANA302 BNANANANA143NANANANA0.0979NANANANA46.7NANANANA<42.6NANANANA5.24 JNANANANA<42.6NANANANA535B NA NA NANA202NANANANA955 BNANANANA<0.0500NANANANA<0.500NANANANA<0.00500NANANANA<0.0250NANANANA<0.0500NANANANA<0.000200NANANANA0.0269NANANANA>176NANANANA<2.21NANANANA398NANANANA<50.0NANANANA8.37NANANANA4,150NANANA20.022.46.890NANANANA<2.250NANANANANANA0.1570.00412 J0.0917NANA2.88713Notes:2) Sample results in bold text are greater than the applicable Delisting Level.-- = Not established.EPA = United States Environmental Protection Agencymg/kg = Milligram per kilogram.mg/L = Milligram per liter.NA = Analysis not required.'SU = Standard unit.VS = Verification Sample.TCLP = Toxicity Characteristic Leaching Procedure< = Less than.> = Greater than.B = Compound was found in the blank and sample1) Sample "VS Event 1 Discrete 1D" is a duplicate of sample "VS Event 1 Discrete 1" and sample VS Event 1 Composite 1D" is a duplicate ofsample "VS Event 1 Composite 1."aDelisting levels are referenced from EPA-R07-RCRA-1014-0452; FRK09919-72-Region-7 Hazardous Waste Management System; Identification andListingof Hazardous Waste;Final Exclusion;Table 1 Paragraph 1.(A),(B),(D)VS Event 2Composite 12/2/2015500-91647-2VS Event 2Discrete 12/2/2015500-91647-1VS Event 2 Composite 12/2/2015VS Event 2 Composite 12/2/2015VS Event 2 Composite 12/2/2015J = Result is less than the Reporting Limit (RL) but greater than or equal to the MethodDetection Limit (MDL) and the concentration is an approximate value.500-91647-9 500-91647-10 500-91647-11Page 2 of 2TABLE 2WASTE DELISTING VERIFICATION SAMPLING RESULTS (SW846 METHOD 1330 SAMPLE DATA)JOHN DEERE DES MOINES WORKS - ANKENY, IOWASample IDVS Event 1Composite1DVS Event 1Composite 1DVS Event 1Composite 1DVS Event 2Composite 1Sample Date 12/17/201412/17/201412/17/20142/2/2015Laboratory ID 1L41353-02 1L41353-031L41353-04Comparison: **EPADelistingTHFExtractTolueneExtractTCLP Extract MMCExtract withMaximumConcentrationAnalytes UnitsLevelsaMinimum Maximum Minimum MaximumMetals TCLP(Method 1330)Arsenic mg/L 5.0 * NA * <0.050 <0.050 <0.050 <0.050 <0.050 No Difference **Barium mg/L 100.0 * 0.037 * 0.062 <0.010 <0.010 0.114 0.062 TCLP **Cadmium mg/L 1.0 * NA * <0.005 <0.005 <0.005 <0.005 <0.005 No Difference **Chromium mg/L 5.0 * 0.039 * 0.027 0.047 <0.020 <0.020 0.027 THF **Copper mg/L -- * 0.423 * NA NA NA NA NA **Mercury mg/L 0.2 * <0.0005 * 0.0005 <0.0005 0.0008 <0.0005 0.0005 No Difference **Nickel mg/L 32.4 * 0.239 * 0.267 0.803 0.045 0.079 0.267 THF **Lead mg/L 5.0 * 0.028 * <0.020 <0.020 <0.020 <0.020 <0.020 No Difference **Vanadium mg/L -- * <0.078 * NA NA NA NA NA **Zinc mg/L -- * 0.026 * NA NA NA NA NA **Extract Volume ml 303 253 563 1,119Notes:MMC = Mobile metal concentration.THF = Tetrahydrofuran.mg/L = Milligram per liter.ml = Milliliter.TCLP = Toxicity Characteristic Leaching Procedure.VS = Verification Sample.EPA = United States Environmental Protection Agency.NA = Analysis not required.-- = Analyte not required in Final Exclusion.aDelisting levels are referenced from EPA-R07-RCRA-1014-0452; FRK09919-72-Region-7 Hazardous Waste Management System; Identification and Listing ofHazardous Waste; Final Exclusion; Table 1 Paragraph 1. (B).VS Event 1Composite 1DMMC Dataset Before FinalExclusion (Initial Event 2011and 6 Events in 2012)MMC Dataset After FinalExclusion (VerificationEvents 2014/2015)** Filter cake sample Oil & Grease result < 1%. SW846 Method 1330 analysis not required.* One sample in dataset.Page1of1TABLE 3WASTE DELISTING VERIFICATION SAMPLING (EQUIPMENT BLANK AND TRIP BLANK DATA)JOHN DEERE DES MOINES WORKS - ANKENY, IOWASample IDVS Event 1 Trip BlankVS Event 2 Trip BlankSample Date 12/17/2014 2/2/2015Laboratory ID 500-89685-6 500-91647-4Analytes UnitsMetals (Total)Antimonymg/L<0.0200NA<0.0200NAArsenicmg/L<0.0100NA<0.0100NABariummg/L<0.0100NA<0.0100NABerylliummg/L<0.00400NA<0.00400NACadmiummg/L<0.00200NA<0.00200NAChromium (total)mg/L<0.0100NA<0.0100NAHexavalent Chromiummg/L<0.0100NA<0.0100NACobaltmg/L<0.00500NA<0.00500NACoppermg/L<0.0100NA<0.0100NALeadmg/L<0.00500NA<0.00500NAMercurymg/L<0.000200NA<0.000200NANickelmg/L<0.0100NA<0.0100NASeleniummg/L<0.0100NA<0.0100NASilvermg/L<0.00500NA<0.00500NAThalliummg/L<0.0100NA<0.0100NATinmg/L<0.0400NA<0.0400NAVanadiummg/L<0.00500NA<0.00500NAZincmg/L0.00542 J,B,^NA<0.0200^NAGeneral ChemistryCyanide (Total) mg/L <0.0100 NA <0.0100 NASulfide mg/L <1.00 NA <1.00 NASulfide, Reactive mg/L <1.00 NA <1.00 NApH SU 7.56 NA 4.7 NAOil & Grease mg/L <5.03 NA 1.33 JB NAVolatile Organic CompoundsAcetonemg/L<0.005<0.005<0.005<0.005Methyl ethyl ketonemg/L<0.005<0.005<0.005<0.005VS Event 2 EB 12/2/2015500-91647-3VS Event 1 EB 112/17/2014500-89685-5Page 1 of 2TABLE 3WASTE DELISTING VERIFICATION SAMPLING (EQUIPMENT BLANK AND TRIP BLANK DATA)JOHN DEERE DES MOINES WORKS - ANKENY, IOWANotes:mg/L = Milligram per liter.NA = Analysis not required.SU = Standard unit.VS = Verification Sample.< = Less than.B = Compound was found in the blank and sample.J = Result is less than the Reporting Limit (RL) but greater than or equal to the Method Detection Limit (MDL)and the concentration is an approximate value.^ = Instrument related quality control (QC) exceeds the control limits. Data is reported by the laboratory,as explained in the analytical report case narrative.Page 2 of 2Photographic Log

Client: John Deere Des Moines Works Project: Filter Cake Waste Delisting Verification Sampling Event No. 2 Site Name: JDDMW - Ankeny, IA Site Location: Building No. 16 Photograph ID: 1 Photo Location: John Deere Des Moines Works - Building No. 16 Direction: View North Survey Date: 2/2/2015 Comments: Sampling equipment for Event 2 of Waste Delisting Verification sampling per EPA Final Exclusion Rule.

Photograph ID: 2 Photo Location: John Deere Des Moines Works - Building No. 16 Direction: View South Survey Date: 2/2/2015 Comments: Filter cake in collection box. Material in box is drop #8 of current box.

## ANALYTICAL REPORT TestAmerica Laboratories, Inc. TestAmerica Chicago 2417 Bond Street University Park, IL 60484 Tel: (708)534-5200 TestAmerica Job ID: 500-91647-1 Client Project/Site: John Deere Des Moines Works Delisting For: MWH Americas Inc 11153 Aurora Avenue Des Moines, Iowa 50322-7904

Attn: Mr. Robert Malcomson

Authorized for release by: 2/20/2015 8:56:36 AM Jim Knapp, Project Manager II (630)758-0262 jim.knapp@testamericainc.com Designee for Therese Hargraves, Project Manager I (708)534-5200 therese.hargraves@testamericainc.com

The test results in this report meet all 2003 NELAC and 2009 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

# Table of Contents Client: MWH Americas Inc Project/Site: John Deere Des Moines Works Delisting TestAmerica Job ID: 500-91647-1

Page 2 of 39 TestAmerica Chicago 2/20/2015 Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 QC Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 3 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 4 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 5 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 6 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 7 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 8 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 9 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 10 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 11 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 12 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 13 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 14 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 15 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 16 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 17 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 18 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 19 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 20 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 21 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 22 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 23 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 24 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 25 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 26 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 27 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 28 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 29 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 30 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 31 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 32 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 33 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 34 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 35 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 36 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 37 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 38 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Page 39 of 39 2/20/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

## ANALYTICAL REPORT TestAmerica Laboratories, Inc. TestAmerica Chicago 2417 Bond Street University Park, IL 60484 Tel: (708)534-5200 TestAmerica Job ID: 500-91647-2 Client Project/Site: John Deere Des Moines Works Delisting For: MWH Americas Inc 11153 Aurora Avenue Des Moines, Iowa 50322-7904

Attn: Mr. Robert Malcomson

Authorized for release by: 2/4/2015 1:39:11 PM Therese Hargraves, Project Manager I (708)534-5200 therese.hargraves@testamericainc.com

The test results in this report meet all 2003 NELAC and 2009 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. 1 2 3 4 5 6 7 8 9 10 11 12 13 14

# Table of Contents Client: MWH Americas Inc Project/Site: John Deere Des Moines Works Delisting TestAmerica Job ID: 500-91647-2

Page 2 of 16 TestAmerica Chicago 2/4/2015 Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 QC Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 3 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 4 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 5 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 6 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 7 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 8 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 9 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 10 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 11 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 12 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 13 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 14 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 15 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 16 of 16 2/4/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14

## ANALYTICAL REPORT TestAmerica Laboratories, Inc. TestAmerica Chicago 2417 Bond Street University Park, IL 60484 Tel: (708)534-5200 TestAmerica Job ID: 500-91647-3 Client Project/Site: John Deere Des Moines Works Delisting For: MWH Americas Inc 11153 Aurora Avenue Des Moines, Iowa 50322-7904

Attn: Mr. Robert Malcomson

Authorized for release by: 2/19/2015 10:48:20 AM Therese Hargraves, Project Manager I (708)534-5200 therese.hargraves@testamericainc.com

The test results in this report meet all 2003 NELAC and 2009 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. 1 2 3 4 5 6 7 8 9 10 11 12 13 14

# Table of Contents Client: MWH Americas Inc Project/Site: John Deere Des Moines Works Delisting TestAmerica Job ID: 500-91647-3

Page 2 of 30 TestAmerica Chicago 2/19/2015 Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 QC Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 3 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 4 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 5 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 6 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 7 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 8 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 9 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 10 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 11 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 12 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 13 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 14 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 15 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 16 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 17 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 18 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 19 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 20 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 21 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 22 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 23 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 24 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 25 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 26 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 27 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 28 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 29 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14Page 30 of 30 2/19/2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14