DuPont Sabine River Works 2739 FM 1006 Orange, TX 77630

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1 IH Sampling Ethylene Unit Turnaround: DuPont Sabine River Works 2739 FM 1006 Orange, TX Dates of Sampling: April 28th May 10th, W. Sam Houston Pkwy, N, Houston, TX Industrial Hygienist: Tim Krill, CIH, CSP Date of Report: August 11th, 2014 DN: cn=timothy J. Krill, o=hagemeyer North America, ou=hagemeyer Technical Services-EH&S Consulting and Training, c=us Date: :43:25-05'00' Signature

2 HAGEMEYER NORTH AMERICA - Technical Services West Sam Houston Parkway North, Houston, Texas OFFICE FAX TABLE OF CONTENTS EXECUTIVE SUMMARY... 2 RECOMMENDATIONS... 4 PROJECT PERSONNEL... 5 INTRODUCTION... 6 PRELIMINARY REPORTS AND EMPLOYEE NOTIFICATION LETTERS ISSUED IN MAY SAMPLING AND ANALYTICAL METHODS... 7 SAMPLING RESULTS EXPOSURE MEASUREMENTS TO ORGANIC VAPORS... 8 SUMMARY TABLES OF EXPOSURE MEASUREMENTS CLEARING THE ETHYLENE UNIT APRIL 28 TH MAY 3 RD, SUMMARY TABLES OF EXPOSURE MEASUREMENTS INITIAL OPENING OF PROCESS FACILITIES IN ETHYLENE UNIT MAY 5 TH 10 TH, CARCINOGENIC RATINGS OF BENZENE AND 1,3-BUTADIENE LISTING OF APPENDICES H AGE MEY E R N O R TH A M ERI CA

3 HAGEMEYER NORTH AMERICA - Technical Services West Sam Houston Parkway North, Houston, Texas OFFICE FAX Executive Summary Hagemeyer North America of Houston, Texas was requested by DuPont Sabine River Works (SRW) to perform industrial hygiene sampling of the initial phases of its turnaround operations of the DuPont SRW ethylene unit at 2739 FM 1006, Orange, Texas From Monday, April 28 th through Saturday, May 10 th, 2014, Hagemeyer had collected 308 personal samples on DuPont operators and maintenance personnel. All samples were analyzed for benzene, and total other hydrocarbon (TOHC) vapors. In the first week of hygiene sampling, April 28 th May 3 rd, 2014, process operators performed clearing operations of process facilities including lines, compressors, pumps, distillation columns, vessels, etc. In the second week of sampling, May 5 th 10 th, 2014, DuPont maintenance personnel oversaw contractor operations of initially opening process facilities. Both of these phases could involve potential exposures to hydrocarbon gases and vapors. Hygiene sampling for benzene, and TOHC was continuously performed on DuPont operators and maintenance personnel as they performed their job assignments. The personal samples were collected at collar level and are therefore considered to be breathing zone exposure measurements. All samples are time-weighted average (TWA) measurements; sampling was conducted for 80% of the 12-hour work shifts. All collected hygiene samples were analyzed by Galson Laboratories, East Syracuse, NY an AIHA 1 -accredited laboratory. Measured results were compared to the OSHA 2 action levels and permissible exposure limits (PEL). From these comparisons, health risks and controls were assessed. If an exposure measurement should approach the OSHA action level or exposure limit, increased engineering and/or health controls would be recommended. Upon receiving the laboratory analytical results, Hagemeyer North America wrote preliminary reports summarizing the results and conclusions. From May 9 th 20 th, 2014, Hagemeyer sent to the occupational health group of DuPont SRW four preliminary reports. The preliminary reports are attached in Appendix A. Overall findings and conclusions from the hygiene sampling sessions are as follows: Clearing of the Ethylene Unit First Week During the clearing operations of the DuPont SRW ethylene unit from April 28 th through May 3 rd, 2014, Hagemeyer had collected a total of 168 personal samples on DuPont process operators.. Only on the first day of clearing operations, April 28 th, did measured exposures exceed the OSHA permissible exposure limit (PEL) and action level for benzene of 1 ppm and 0.5 ppm, respectively. On this initial day, three operators had measured benzene exposures of 2.6, 1.4 and 1.2 ppm TWA. Additionally, three operators had measured benzene exposures of 0.75, 0.68 and 0.50 ppm TWA exceeding the OSHA action level but less than the OSHA PEL. On the fourth day of clearing operations, May 1 st, 2014, one process operator had a benzene exposure of 0.47 ppm TWA nearly equaling the OSHA action level of. 1 AIHA: American Industrial Hygiene Association accredits laboratories performing analysis of occupational hygiene and environmental microbiology samples. AIHA accreditation complies with International Standard ISO/IEC An AIHAaccredited laboratory must achieve and demonstrate a prescribed level of technical competency in performing specific analyses of chemical hygiene and environmental samples. 2 OSHA: Occupational Safety and Health Administration of the U.S. Department of Labor propagates and enforces occupational safety and health standards in the United States. OSHA enforces its permissible exposure limits (PELs) for toxic and hazardous substances via the federal occupational safety and health standard of 29 Code of Federal Regulations, Part 1910, Subpart Z tilted, Toxic and Hazardous Substances. Page 2 H AGE MEY E R N O R TH A M ERI CA

4 Executive Summary 08/11/14 DuPont Sabine River Works Industrial Hygiene Sampling Ethylene Unit Turnaround For clearing events resulting in expected exposures, operators reported to have donned full-face respirators fitted with multi-purpose cartridges of trade name Scott AV-2000 with Scott multipurpose cartridges #7422- YD1. This cartridge is NIOSH approved for protection against organic vapors, acid gases and particulates. A recommendation is submitted suggesting that DuPont identify, investigate, and document job tasks of the first day of clearing operations, April 28 th, that are suspects to the six benzene exposure measurements that exceeded the OSHA action level or its permissible exposure limit (PEL). Development of a listing of suspect work tasks will enable operators to better plan health controls and work practices for future clearing operations. 1,3-Butadiene. No exposure measurements exceeded the OSHA action level of. Highest measurement was 0.40 ppm TWA. There were several measurements ranging from 0.05 to 0.28 ppm TWA. All remaining measurements were less than the laboratory s limit of quantification (LOQ), i.e. was not detected on the samples to within the laboratory s LOQ. Total other hydrocarbon (TOHC) vapors. TOHC were detected on multiple samples; measurements ranged from 0.62 to 8.6 ppm TWA. There are no OSHA, NIOSH or ACGIH exposure limits applicable to a broad class of hydrocarbon vapors. On several samples ethyl alcohol was identified as well as unidentified hydrocarbons. Clearing operations are only performed in preparation of a turnaround project of the ethylene unit an event occurring once every few years. Therefore, the above measured exposures are not routine and occur only every few years. Opening of Process Facilities Second Week During the initial opening of process facilities in the ethylene unit from May 5 th 10 th, 2014, DuPont maintenance personnel oversaw contractor operations of initially opening process lines, pumps, compressors, vessels, columns, etc. In general, DuPont personnel positioned themselves upwind and several feet or more from the initial opening or line breaks. In this second week, Hagemeyer had collected 140 full-shift personal samples on DuPont maintenance personnel. These personnel include mechanics and I&E technicians of ENCO. Of the 140 collected personal samples, there were no exposures that equaled or exceeded the OSHA action levels and permissible exposure limits (PELs) for benzene and. For both benzene and, OSHA enforces an action level and PEL of 0.5 and, respectively.. Only 9 personal samples had measurable levels of benzene; two mechanics incurred benzene exposures of 0.27 and 0.2. The seven remaining exposure measurements were 0. or less. All other remaining samples had measurements which were less than the laboratory limit of quantification (LOQ), i.e. benzene was not detected on the samples to within the laboratory LOQ. 1,3-Butadiene. On all samples, measurements for were less than the laboratory s limit of quantification (LOQ), i.e. was not detected on the personal samples to within the laboratory s LOQ. Total other hydrocarbon (TOHC) vapors. Only three samples had measurable amounts of TOHC vapors. Measurements were 1.8 ppm, 1.3 ppm and 0.90 ppm TWA. All other TOHC measurements were less than the laboratory s limit of quantification. There are no OSHA, NIOSH or ACGIH exposure limits applicable to a broad class of hydrocarbon vapors. On several samples ethyl alcohol was identified as well as other unidentified hydrocarbons. Hagemeyer North America thanks Carla Brown of DuPont Occupational Health for arranging and coordinating these hygiene sampling sessions during the initial phases of the ethylene unit turnaround. Hagemeyer also thanks operators and maintenance personnel of DuPont Sabine River Works for their participation in the hygiene sampling sessions. Indeed, everyone was most cooperative in their participation and provided valuable information about their work procedures, safety and health controls, and exposure times. Page 3 H AGE MEY E R N O R TH A M ERI CA

5 DuPont Sabine River Works, Orange, TX 08/11/14 Industrial Hygiene Sampling Sessions Ethylene Unit Turnaround 2014 RECOMMENDATIONS IH Identify Job Tasks Resulting in Exposures on April 28 th, 2014 Clearing of Ethylene Unit. Job tasks and work activities of the clearing operations on April 28 th, 2014 resulting in measured benzene exposures exceeding the OSHA action level or OSHA permissible exposure limit (PEL) should be identified and inventoried. Development of an inventory listing of suspect work tasks will enable operators to be prepared for implementing health controls and perhaps better work practices in future clearing operations. On April 28 th, 2014 first day of clearing of the ethylene unit three operators had benzene exposures exceeding the OSHA PEL of, and three operators had benzene exposures exceeding the OSHA action level of but less than the OSHA PEL. These personal measurements with descriptions of work locations and work activities are highlighted in Summary Table 1-D (day shift) and Summary Table 1-N (night shift) of Appendix E. Additionally, during clearing operations on Thursday, May 1 st, 2014, one operator incurred a measured benzene exposure of 0.47 ppm TWA which nearly equals the OSHA action level of. This measurement and its associated job tasks and work location is highlighted in Summary Table 4-D (day shift). Through investigations of work activities associated with the above measurements, operators of the ethylene unit may then develop a lists of work tasks which are suspects to benzene exposures exceeding the OSHA action level or PEL. Perhaps, operators may be able to implement work practice controls for reducing exposures, e.g. upwind or remote positioning. As a minimum, with development of an inventory listing of suspect work tasks, operators will be prepared to don full-face respiratory protection equipped with organic vapor cartridges. Clearing of the ethylene unit is performed in preparation of a turnaround project of the ethylene unit. This event occurs only once every few years. Therefore, job tasks and associated measured exposures of these hygiene sampling sessions are of not of routine operations or routine exposures. exposures equaling or exceeding the OSHA action level and/or the OSHA permissible exposure limit (PEL) occurred only on the first day of unit clearing, i.e. April 28 th, No exceedance of either the OSHA action levels or OSHA PELs for benzene had occurred on the remaining days of hygiene sampling, i.e. April 29 th through May 10 th, During the entirety of this hygiene sampling project, no exceedance of the 1,3- butadiene exposure limits ever occurred. IH Maintain Records of Employee Exposure Measurements and Inform Employees. All employee exposure records (hygiene exposure measurements) should be maintained at the DuPont Sabine River Works (SRW), Orange, Texas for 30 years, per OSHA 29 CFR, Part (d)(1)(ii), Access to Employee Exposure and Medical Records Preservation of Records Employee Exposure Records, (k)(1), Recordkeeping Exposure Measurements, and (m)(2), 1,2-Butadiene Recordkeeping Exposure Measurements. DuPont SRW should maintain the entirety of this report including all laboratory analytical reports, field survey data sheets, and preliminary reports, i.e. the appendices of this report. DuPont operators and maintenance personnel participating in these hygiene sampling sessions should be informed in writing of their measured exposures and whether they Page 4 H AGE MEY E R N O R TH A M ER I CA

6 DuPont Sabine River Works, Orange, TX 08/11/14 Industrial Hygiene Sampling Sessions Ethylene Turnaround 2014 PROJECT PERSONNEL equaled or exceeded the OSHA action levels and/or OSHA permissible exposure limits (PELs). OSHA 29 CFR (e)(7), Exposure Monitoring Employee notification of monitoring results and (d)(7), 1,3-Butadiene Exposure Monitoring Employee notification of monitoring results. To assist DuPont SRW in informing its employees of their exposure measurements, Hagemeyer North America has prepared drafts of employee notification letters for all personal exposure measurements made in these hygiene sampling sessions. The drafts were sent via to Carla Brown, DuPont Occupational Health, on May 21 st, 22 nd and 23 rd, The transmittal letters and hyperlinks for downloading electronic files of the drafts are attached in Appendix B. Both hygiene exposure measurements and this evaluation (report) should be readily available to employees, physicians and OSHA safety and health compliance officers. Employees should be informed at the time of hiring and once per year thereafter of 1) the location and availability of hygiene (chemical and noise) exposure records, 2) the person responsible for maintaining and providing access to the records, and 3) the employee s rights to access the exposure records. OSHA 29 CFR (e)(2) and.1020(g), Access to Employee Exposure and Medical Records Access to Records and Employee Notification, (k)(3)(i-ii), Recordkeeping Availability, and (m)(5), 1,3-Butadiene Recordkeeping Availability. Carla Brown of DuPont SRW Occupational Health arranged the industrial hygiene sampling project of the initial phases of the 2014 turnaround project of the DuPont SRW ethylene unit, Orange, TX. Mrs. Brown also supplied information related to the scheduling of the various operations of the turnaround project. Process operators of the ethylene unit and DuPont maintenance personnel had participated in the hygiene sampling sessions by wearing 3M organic vapor monitors for continuously sampling of hydrocarbon vapors in the breathing zone. In addition to wearing the organic vapor monitors, the DuPont operators and maintenance personnel had provided valuable information regarding their operations, work procedures, exposure times and safety and health controls. Mr. Tim Krill, CIH, CSP, safety and industrial hygiene specialist of Hagemeyer North America, Houston, Texas had directed the Hagemeyer industrial hygiene team in performing this industrial hygiene sampling project. In addition to Mr. Krill, the Hagemeyer team consisted of the following five industrial hygiene technicians. Day shift La Toya Wise, Shangri LaStrapes and Kewana Lewis Night shift Regina Parsell and Chandra Mayfield. The industrial hygiene technicians attached and removed the 3M organic vapor monitors from the DuPont operators and maintenance personnel. The technicians recorded the monitors ID numbers along with names and job positions of the DuPont personnel. Additionally, the technicians were responsible for performing exit interviews with DuPont personnel and recording work activities, work locations, exposure times, expected exposure events, use of respiratory protection, etc. For each sample, Hagemeyer technicians had recorded these sampling data onto industrial hygiene field data sheets. For all onsite hygiene sampling sessions, Mr. Krill oversaw field sampling procedures of the Hagemeyer industrial hygiene technicians. Mr. Krill was responsible for taking custody of all collected industrial hygiene samples. Mr. Krill submitted and shipped all hygiene samples and completed and signed sample chain of custody records for shipping and transferring samples to the industrial hygiene laboratory. Mr. Page 5 H AGE MEY E R N O R TH A M ERI CA

7 DuPont Sabine River Works, Orange, TX 08/11/14 Industrial Hygiene Sampling Sessions Ethylene Turnaround 2014 Krill had also evaluated all sampling analytical data and wrote the preliminary reports, drafts of employee notification letters and the project final survey report. Hagemeyer North America is a provider of professional occupational safety and health consulting services under its operating division of Hagemeyer Technical Services Group. INTRODUCTION Hagemeyer North America was requested by DuPont Sabine River Works (SRW) to perform industrial hygiene sampling of the initial phases of its turnaround operations of the DuPont SRW ethylene unit at 2739 FM 1006, Orange, TX This hygiene sampling project had the following survey objectives: During clearing of the ethylene unit, measure operators exposures to benzene, and total other hydrocarbon (TOHC) vapors. Process facilities including process lines, pumps, gas compressors, distillation columns, vessels, etc. must be cleared of hydrocarbon fluids before these facilities can be opened and serviced in the turnaround project. For clearing, process facilities are typically flushed with nitrogen and/or steam. The clearing operations often involve opening vent valves for verifying hydrocarbon removal. During any venting operations, operators were to don fullface respirators equipped with organic vapor cartridges, trade name Scott AV-2000 fitted with Scott multipurpose cartridges #7422-YD1. Clearing operations were performed from April 28 th through May 3 rd, During initial opening of process facilities of the ethylene unit, measure DuPont maintenance personnel s exposures to benzene, and total other hydrocarbon (TOHC) vapors. After the ethylene unit was cleared, operators then transferred the custody of the ethylene unit to DuPont maintenance personnel who oversaw the various contractors in performing turnaround services of process facilities. In the first week of the turnaround, initial openings or line breaks of process facilities were made. In overseeing the initial openings, DuPont maintenance personnel were typically positioned upwind and several feet from the site of the initial opening or line break. These initial openings of process facilities had occurred in the second week of hygiene sampling project from May 5 th 10 th, For both of these above phases, the industrial hygiene team of Hagemeyer North America had conducted industrial hygiene sampling on DuPont personnel. Hygiene sampling was performed on both the day and night shifts. Sampling was continuously performed in the breathing zone of DuPont personnel as they performed their various job assignments. The Hagemeyer industrial hygiene technicians collected 14 personal samples per 12-hour shift or 28 personal samples per 24-hour period. A total of 168 personal samples were collected during the clearing operations (first week), and 140 personal samples were collected during the initial opening of process facilities (second week). All collected hygiene samples were obtained over 80% of the 12-hour work shift or defined as timeweighted average (TWA) measurements for the sampling period. Short-term exposure samples or STEL samples for 15-minute exposure periods were not collected. DuPont SRW and Hagemeyer North America had both agreed that access of industrial hygiene technicians into the ethylene unit during clearing operations and line breaks presented health risks which do not need to be incurred by non-operational personnel. Preliminary Reports and Employee Notification Letters Issued in May 2014 Upon receiving the laboratory analytical results, Mr. Tim Krill, CIH, CSP, project director of the Hagemeyer industrial hygiene team, issued preliminary reports via to Carla Brown of DuPont SRW Occupational Health. The preliminary reports summarized sampling results, conclusions and Page 6 H AGE MEY E R N O R TH A M ERI CA

8 DuPont Sabine River Works, Orange, TX 08/11/14 Industrial Hygiene Sampling Sessions Ethylene Turnaround 2014 recommendations. For this industrial hygiene survey project, four preliminary reports were issued. For the clearing operations of the ethylene unit, preliminary reports were issued May 9 th, May 12 th and May 15 th, For the initial opening of process facilities, a preliminary report was issued on May 20 th, The preliminary reports are posted in Appendix A. Hagemeyer had also provided DuPont SRW Occupational Health drafts of employee notification letters. These letters are provided to assist DuPont SRW in notifying employees who had participated in the hygiene sampling sessions of their measured exposures and whether their measured exposures exceeded OSHA action levels or permissible exposure limits (PELs). The drafts also assist DuPont SRW in complying with OSHA federal safety and health regulations in notifying employees of their measured exposures to benzene and. 3 Drafts of employee notification letters were sent May 21 st, 22 nd, and 23 rd, transmittal letters (4) for the sending of these letters are attached in Appendix B. Also in Appendix B are hyperlinks for downloading zip files containing electronic files of the drafts of employee notification letters. SAMPLING AND ANALYTICAL METHODS Personal sampling techniques were employed for measuring employees exposures to benzene, 1,3- butadiene, and total other hydrocarbon (TOHC) vapors. For collecting personal samples, sampling was continuously performed in the breathing zone of DuPont personnel while performing their job assignments. Sampling was performed for a full-shift, considered to be at least 80% of a 12-hour work shift or 9.6 hours. All samples collected were therefore time-weighted average (TWA) samples for the sampling period. All hygiene samples were collected using passive diffusion badges containing coconut charcoal media which adsorbed hydrocarbon vapors present in the breathing zone. Trade name of the passive diffusion badges is 3M organic vapor monitor (OVM) #3520. This monitor has primary and backup adsorbent sections. If a hydrocarbon vapor should escape the primary section, the backup section should capture the vapor notifying the analyst of a vapor migration problem. At the beginning of the work shift, Hagemeyer industrial hygiene technicians affixed the 3M organic vapor monitors (OVMs) onto collars of DuPont personnel. Hagemeyer technicians recorded onto IH field data sheets monitor identification numbers along with names of DuPont personnel participating in the hygiene sampling sessions and their job positions and anticipated work activities. At the end of the sampling sessions, Hagemeyer industrial hygiene technicians removed the 3M OVMs from DuPont personnel and recorded the time of sampling. Hagemeyer IH technicians also conducted exit interviews of DuPont personnel for determining their work locations, job tasks, respiratory protection, expected exposure events, etc. All data were recorded on the IH field data sheets. DuPont employees and the Hagemeyer industrial hygiene technicians signed and dated the IH field data sheets declaring that the 3M monitor was worn and taken from the collar of the employee. Hyperlinks for downloading the.pdf files containing the signed and dated IH field data sheets are posted in Appendix D. The Hagemeyer project director, Mr. Tim Krill, CIH, CSP then took custody of all collected hygiene samples (3M OVMs). Mr. Krill completed and signed all chain of custody records and overnight shipped the hygiene samples to Galson Laboratories, East Syracuse, NY. This laboratory is an AIHA (American Industrial Hygiene Association) accredited laboratory for the analysis of environment and industrial hygiene samples including organic vapor compounds. Certificates of AIHA accreditation for Galson Laboratories are attached in Appendix C. 3 Employee notification requirements are in the OSHA federal occupational health standards for benzene and 1,3- butadiene. Standards are 29 Code of Federal Regulations (CFR) (e)(7), Employee notification of monitoring results and (d)(7), Employee notification of monitoring results. Page 7 H AGE MEY E R N O R TH A M ERI CA

9 DuPont Sabine River Works, Orange, TX 08/11/14 Industrial Hygiene Sampling Sessions Ethylene Turnaround 2014 All industrial hygiene samples were collected and analyzed in accordance to NIOSH 4 methods specific to benzene, and total other hydrocarbon (TOHC) vapors. Details of the NIOSH methods are in Table 1 below. Laboratory analysis reports from Galson Laboratories are attached in Appendix C. Also attached in Appendix C is signed and dated chain of custody records for sample submission to Galson Laboratories. Table 1 NIOSH Referenced Sampling & Analytical Methods Hygiene Sampling at DuPont SRW, Orange, TX Ethylene Unit Turnaround 2014 Contaminant Operations Referenced Sampling and Analytical Method Collection Media & Flow Rate Analytical Method Clearing ethylene unit NIOSH Method #1501 GC-FID Overseeing initial opening of process facilities 3M Organic Vapor Monitor #3520 having primary and backup adsorbent sections of coconut charcoal. Opened face sampling at a sampling rate of 35.5 cubic centimeters per minute (ccpm) for full-shift sampling. 1,3-Butadiene Clearing ethylene unit NIOSH Method #1024 GC-FID Overseeing initial opening of process facilities 3M Organic Vapor Monitor #3520 having primary and backup adsorbent sections of coconut charcoal. Opened face sampling at a sampling rate of 42.8 cubic centimeters per minute (ccpm) for full-shift sampling. Total Other Hydrocarbon Vapors (TOHC) Clearing ethylene unit Overseeing initial opening of process facilities NIOSH Method #1500 3M Organic Vapor Monitor #3520 having primary and backup adsorbent sections of coconut charcoal. GC-FID Opened face sampling at a sampling rate of 32.0 cubic centimeters per minute (ccpm) for full-shift sampling. GC-FID = gas chromatography with flame ionization detector. SAMPLING RESULTS EXPOSURE MEASUREMENTS TO ORGANIC VAPORS Measured results from the personal hygiene exposure measurements for benzene and are compared to the OSHA action levels and permissible exposure limits (PELs) enabling assessment of health risks. Attached in Appendix E are summary tables listing each personal sample, person s name and job 4 NIOSH: National Institute of Occupational Health and Safety. NIOSH is responsible for researching, developing, validating and publishing industrial hygiene sampling and analytical methods for chemicals regulated by the OSHA standards. Page 8 H AGE MEY E R N O R TH A M ERI CA

10 DuPont Sabine River Works, Orange, TX 08/11/14 Industrial Hygiene Sampling Sessions Ethylene Turnaround 2014 position, work locations and summary of job activities, sampling times, measured results for benzene, 1,3- butadiene and total other hydrocarbon vapors, and comparisons to the OSHA action levels and permissible exposure limits (PELs). Hyperlinks to the summary tables in Appendix E are provided below. The Executive Summary on pages 2 and 3 summarizes the results from these tables and hygiene sampling sessions. Summary Tables of Exposure Measurements Clearing the Ethylene Unit April 28 th May 3 rd, 2014: Table 1-D Exposure Measurements of Day Shift on April 28 th, 2014, Clearing Unit, 3 pages. Table 1-N Exposure Measurements of Night Shift April 28 th 29 th, 2014, Clearing Unit, 3 pages. Table 2-D Exposure Measurements of Day Shift on April 29 th, 2014, Clearing Unit, 3 pages. Table 2-N Exposure Measurements of Night Shift April 29 th 30 th, 2014, Clearing Unit, 3 pages. Table 3-D Exposure Measurements of Day Shift April 30 th, 2014, Clearing Unit, 3 pages. Table 3-N Exposure Measurements of Night Shift April 30 th May 1 st, 2014, Clearing Unit, 3 pages. Table 4-D Exposure Measurements of Day Shift May 1 st, 2014, Clearing Unit, 3 pages. Table 4-N Exposure Measurements of Night Shift May 1 st May 2 nd, 2014, Clearing Unit, 3 pages. Table 5-D Exposure Measurements of Day Shift May 2 nd, 2014, Clearing Unit, 3 pages. Table 5-N Exposure Measurements of Night Shift May 2 nd - May 3 rd, 2014, Clearing Unit, 3 pages. Table 6-D Exposure Measurements of Day Shift May 3 rd, 2014, Clearing Unit, 3 pages. Table 6-N Exposure Measurements of Night Shift May 3 rd - May 4 th, 2014, Clearing Unit, 3 pages. Summary Tables of Exposure Measurements Initial Opening of Process Facilities in Ethylene Unit May 5 th 10 th, 2014: Table 7-D Exposure Measurements of Day Shift on May 5 th, 2014, Opening Facilities, 3 pages. Table 7-N Exposure Measurements of Night Shift May 5 th 6 th, 2014, Opening Facilities, 3 pages. Table 8-D Exposure Measurements of Day Shift on May 6 th, 2014, Opening Facilities, 3 pages. Table 8-N Exposure Measurements of Night Shift May 6 th 7 th, 2014, Opening Facilities, 3 pages. Table 9-D Exposure Measurements of Day Shift May 7 th, 2014, Opening Facilities, 3 pages. Table 9-N Exposure Measurements of Night Shift May 7 th 8 th, 2014, Opening Facilities, 3 pages. Table 10-D Exposure Measurements of Day Shift May 8 th, 2014, Opening Facilities, 3 pages. Table 10-N Exposure Measurements of Night Shift May 8 th 9 th, 2014, Opening Facilities, 3 pages. Page 9 H AGE MEY E R N O R TH A M ERI CA

11 DuPont Sabine River Works, Orange, TX 08/11/14 Industrial Hygiene Sampling Sessions Ethylene Turnaround 2014 Table 11-D Exposure Measurements of Day Shift May 9 th, 2014, Opening Facilities, 3 pages. Table 11-N Exposure Measurements of Night Shift May 9 th 10 th, 2014, Opening Facilities, 2 pgs.: Carcinogenic Ratings of and 1,3-Butadiene and are classified as known human carcinogens. The U.S. National Toxicology Program (NTP) assigns its K classification of carcinogenicity, Known to be a Human Carcinogen, to both benzene and. Likewise, The International Agency for Research on Cancer (IARC) assigns its carcinogenic category of IARC-1, Carcinogenic to Humans, for benzene and. However, the ACGIH (American Conference of Governmental Industrial Hygienists) 5 assigns its A1 classification, Confirmed Human Carcinogen, to benzene, and, with respect to, the ACGIH has assigned its A2 classification defined as, Suspected Human Carcinogen. OSHA regulates employee exposures to benzene and through the substance-specific, federal health standards 29 Code of Federal Regulations (CFR) Part , and Part , 1,3-Butadiene. Both of these standards enforce action levels and permissible exposure limits (PELs) at and, respectively. LISTING OF APPENDICES Appendix A Appendix B Preliminary Report Exposure Measurements of Clearing Operations in Ethylene Unit on April 28 th and 29 th, 2014, sent via to Carla Brown, DuPont Occupational Health, on May 9 th, 2014 at 1039 hour CDT, 2 pages. Preliminary Report Exposure Measurements of Clearing Operations in Ethylene Unit on April 30 th and May 1 st, 2014, sent via to Carla Brown, DuPont Occupational Health, on May 12 th, 2014 at 2138 hour CDT, 2 pages. Preliminary Report Exposure Measurements of Clearing Operations in Ethylene Unit on May 2 nd and 3 rd, 2014, sent via to Carla Brown, DuPont Occupational Health, on May 15 th, 2014 at 1507 hour CDT, 2 pages. Preliminary Report Exposure Measurements of DuPont Maintenance Personnel 1 st Week of Turnaround Operations Initial Opening of Process Facilities, sent via to Carla Brown, DuPont Occupational Health, on May 20 th, 2014 at 2004 hour CDT, 2 pages. transmittal letters (4) for the sending of the drafts of employee notification letters, 4 pages. Letters transmitted May 21 st, 2014 at 2047 hr. CDT, May 22 nd, 2014 at 1331 hr. CDT, May 23 rd, 2014 at 1226 hr. CDT and May 23 rd, 2014 at 1541 hr. CDT. Hyperlinks (4) for downloading compressed zip files containing drafts of employee notification letters. 5 ACGIH : American Conference of Governmental Industrial Hygienists. The ACGIH is a professional society comprised of practitioners in industrial hygiene, occupational health and environmental health and safety. The ACGIH researches, develops and publishes the threshold limit values (TLVs ) and the biological exposure indices (BEIs ). Page 10 H AGE MEY E R N O R TH A M ERI CA

12 DuPont Sabine River Works, Orange, TX 08/11/14 Industrial Hygiene Sampling Sessions Ethylene Turnaround 2014 Appendix C Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Monday, April 28 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Tuesday, April 29 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Wednesday, April 30 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Thursday, May 1 st, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Friday, May 2 nd, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Saturday, May 3 rd, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Monday, May 5 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Tuesday, May 6 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Wednesday, May 7 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Thursday, May 8 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Friday, May 9 th, Signed chain of custody records for sample submission. 12 pages. AIHA Certificates of Laboratory Accreditation for Galson Laboratories, 6601 Kirkville Road, East Syracuse, New York, 3 pages. Appendix D Appendix E Hyperlinks for downloading.pdf files containing industrial hygiene field data sheets from hygiene sampling sessions conducted at DuPont Sabine River Works (SRW), Orange, TX of the ethylene turnaround project. Hygiene sampling was performed from April 28 th May 10 th, IH field data sheets were completed and signed, i.e. a field data sheet for each personal sample collected. Summary Tables of Exposure Measurements Hygiene Sampling Sessions Clearing of Ethylene Unit and Initial Opening of Process Facilities April 28 th May 10 th, 2014 Page 11 H AGE MEY E R N O R TH A M ERI CA

13 DuPont Sabine River Works, Orange, TX 08/11/14 Industrial Hygiene Sampling Sessions Ethylene Unit Turnaround 2014 APPENDIX A Preliminary Report Exposure Measurements of Clearing Operations in Ethylene Unit on April 28 th and 29 th, 2014, sent via to Carla Brown, DuPont Occupational Health, on May 9 th, 2014 at 1039 hour CDT, 2 pages. Preliminary Report Exposure Measurements of Clearing Operations in Ethylene Unit on April 30 th and May 1 st, 2014, sent via to Carla Brown, DuPont Occupational Health, on May 12 th, 2014 at 2138 hour CDT, 2 pages. Preliminary Report Exposure Measurements of Clearing Operations in Ethylene Unit on May 2 nd and 3 rd, 2014, sent via to Carla Brown, DuPont Occupational Health, on May 15 th, 2014 at 1507 hour CDT, 2 pages. Preliminary Report Exposure Measurements of DuPont Maintenance Personnel 1 st Week of Turnaround Operations Initial Opening of Process Facilities, sent via to Carla Brown, DuPont Occupational Health, on May 20 th, 2014 at 2004 hour CDT, 2 pages. H AGE MEY E R N O R TH A M ERI CA

14 Tim Krill From: Sent: To: Subject: Tim Krill Friday, May 09, :39 AM Carla Brown Preliminary Report--Hygiene Exposure Measurements of Clearing Operations in Ethylene Unit--IH Sampling of DuPont SRW Turnaround Project--Tim Krill, Hagemeyer North America Hello Carla, Hagemeyer North America had just received the laboratory analytical results for our hygiene samples collected on first two days of clearing operations in the ethylene unit of DuPont Sabine River Works, Orange, TX. These samples were obtained on the day and night shifts of Monday and Tuesday, April 28 th and 29 th, All collected hygiene samples were full-shift, personal samples continuously taken in the breathing zone of process operators. Samples were analyzed for, benzene and total other hydrocarbons (TOHC). A summary of the measured exposures are as follows. Monday, April 28 th, st day of Clearing Operations in Ethylene Unit: Of the 28 personal samples collected over the day and night shifts, three operators incurred benzene exposures exceeding the OSHA permissible exposure limit (PEL) for benzene of 1.0 ppm TWA; measurements were 2.6, 1.4 and 1.2 ppm TWA. Additionally, three operators had benzene exposures exceeding the OSHA action level of 0.5 ppm but less than the OSHA PEL of 1.0 ppm; measurements were 0.75, 0.68 and 0.50 ppm TWA. Numerous operators had benzene exposures ranging from 0.04 to 0.2 ppm TWA. Of the 28 personal sampled collected over the day and night shifts, nobody had measured exposures to 1,3- butadiene exceeding the OSHA action level of. Two operators incurred exposures to of 0.28 and 0.22 ppm TWA. All other operators (26) incurred measured exposures at less than values, i.e. 1,3- butadiene was not detected on their personal samples to within the laboratory limit of quantification (LOQ). Total other hydrocarbon (TOHC) vapors were measured on several samples. There are no exposure limits for TOHC. Tuesday, April 29 th, nd day of Clearing Operations in Ethylene Unit: Of the 28 personal samples collected over the day and night shifts, nobody incurred benzene exposures at or exceeding the OSHA action level of. Highest measured benzene exposures were 0.39 ppm and 0.34 ppm TWA. Additionally, several operators incurred benzene exposures ranging from 0.1 to 0.25 ppm TWA. Numerous operators had residual exposures to benzene less than 0.. Of the 28 personal sampled collected over the day and night shifts, all personal exposure measurements for 1,3- butadiene were less than (<) ppm TWA, i.e. was not detected on the personal samples to within the laboratory limit of quantification (LOQ). Total other hydrocarbon (TOHC) vapors were measured on only two samples. There are no exposure limits for TOHC. Employee Notification Letters: 1

15 Since process operators had participated in a few sampling sessions throughout the week of clearing operations, we ll wait to receive all analytical results of the clearing operations in the Ethylene unit. Employee notification letters will then be prepared for each operator informing him/her of all measured exposures from each of his/her sampling session. Thank you Carla for all your support and coordination of our industrial hygiene sampling project at the ethylene unit of DuPont Sabine River Works, Orange, TX. I ll continue to send you preliminary reports as we receive laboratory analytical results from our hygiene samples collected in this IH sampling project. Thank you, Tim Krill, CIH, CSP Hagemeyer North America Technical Services Group--EH&S Consulting and Training 6825 West Sam Houston Pkwy North Houston, TX cell 2

16 Tim Krill From: Sent: To: Subject: Attachments: Tim Krill Monday, May 12, :38 PM Carla Brown Preliminary Report--Hygiene Exposure Measurements of April 30th and May 1st--Clearing Operations of Ethylene Unit--Tim Krill, Hagemeyer North America Summary Table May 1--Organic Vapor Exposure Measurements--Clearing of Ethylene Unit-- DuPont SRW, Orange, TX.pdf Hello Carla, Hagemeyer North America had just received the laboratory analytical results for our hygiene samples collected on the third and fourth days of clearing operations in the ethylene unit of DuPont Sabine River Works, Orange, TX. These samples were obtained on the day and night shifts of Wednesday and Thursday, April 30 th and May 1 st, All collected hygiene samples were full-shift, personal samples continuously taken in the breathing zone of DuPont process operators. Samples were analyzed for, benzene and total other hydrocarbons (TOHC). In evaluating exposure data from the clearing operations of the ethylene unit, it should be considered that exposures from clearing operations are not routine exposures. Clearing is only performed when shutting down the unit an event which occurs every few years. A summary of the measured exposures are as follows. Wednesday, April 30 th, rd day of Clearing Operations in Ethylene Unit: Of the 28 personal samples collected over the day and night shifts, nobody incurred a benzene exposure equaling or exceeding the OSHA action level of. Greatest benzene exposure measurement was 0.19 ppm TWA. There were five exposure measurements ranging from 0.03 to 0.05 ppm TWA. The remaining measurements were less than values, i.e. benzene was not detected on the breathing zone samples to within the laboratory limit of quantification (LOQ). Of the 28 personal sampled collected over the day and night shifts, nobody had measured exposures to 1,3- butadiene exceeding the OSHA action level of. Greatest exposure measurement to was 0.40 ppm TWA. A second operator had a measured exposure of 0.18 ppm TWA. The remaining measurements were less than values, i.e. was not detected on the breathing zone samples to within the laboratory limit of quantification (LOQ). Total other hydrocarbon (TOHC) vapors were measured on two personal samples having the results of 0.70 and 0.81 ppm TWA. All other measurements were less than values, i.e. TOHC were not detected on the breathing zone samples to within the laboratory limit of quantification (LOQ). There are no exposure limits for TOHC. Thursday, May 1 st, th day of Clearing Operations in Ethylene Unit: Of the 28 personal samples collected over the day and night shifts, highest measured exposure to benzene was 0.47 ppm TWA--nearly equaling the OSHA action level of. The operator worked at clearing the heaters and reported wearing of a full-face respirator (Scott AV-2000) with multi-purpose cartridges (Scott #7422-YD1). Second highest exposure measurement was 0.25 ppm TWA. Additionally, there were five measurements ranging from 0.04 ppm to 0.18 ppm TWA. The remaining measurements were less than values, i.e. benzene was not detected on the personal samples to within the laboratory limit of quantification (LOQ). 1

17 Attached is a summary table for the May 1 st hygiene sampling session. This table provides data on each sample collected during the sampling session. Data includes the person s name, sample ID number, time of sampling session, brief description of job activities as reported by the operator and exposure measurements for benzene, and total other hydrocarbons (TOHC). Of the 28 personal sampled collected over the day and night shifts, all personal exposure measurements for 1,3- butadiene were less than (<) ppm TWA, i.e. was not detected on the personal samples to within the laboratory limit of quantification (LOQ). Total other hydrocarbon (TOHC) vapors were measured on several samples. There are no exposure limits for TOHC. Employee Notification Letters: Since process operators had participated in a few sampling sessions throughout the week of clearing operations, I ll wait to receive all analytical results of the clearing operations in the ethylene unit. Employee notification letters will then be prepared for each operator informing him/her of all measured exposures from each of his/her sampling session. Thank you Carla for all your support and coordination of our industrial hygiene sampling project at the ethylene unit of DuPont Sabine River Works, Orange, TX. I ll continue to send you preliminary reports as we receive laboratory analytical results from our hygiene samples collected in this IH sampling project. Thank you, Tim Krill, CIH, CSP Hagemeyer North America Technical Services Group--EH&S Consulting and Training 6825 West Sam Houston Pkwy North Houston, TX cell 2

18 Tim Krill From: Sent: To: Subject: Tim Krill Thursday, May 15, :07 PM Carla Brown Preliminary Report--Exposure Measurements of May 2nd and 3rd--Clearing Operations of Ethylene Unit--Tim Krill, Hagemeyer North America Hello Carla, Hagemeyer North America has received the laboratory analytical results for our hygiene samples collected on the fifth and sixth days of the clearing operations in the ethylene unit of DuPont Sabine River Works, Orange, TX. These samples were obtained on the day and night shifts of Friday and Saturday, May 2 nd and 3 rd, All collected hygiene samples were full-shift, personal samples continuously taken in the breathing zone of DuPont process operators. Samples were analyzed for, benzene and total other hydrocarbons (TOHC). A summary of the measured exposures are as follows. Friday, May 2 nd, th day of Clearing Operations in Ethylene Unit: Of the 28 personal samples collected over the day and night shifts, nobody incurred a benzene exposure equaling or exceeding the OSHA action level of. Greatest benzene exposure measurement was 0.16 ppm TWA. Additionally, there were two exposure measurements of 0.04 ppm TWA. All remaining measurements were less than values, i.e. benzene was not detected on the breathing zone samples to within the laboratory limit of quantification (LOQ). Of the 28 personal samples collected over the day and night shifts, all exposure measurements for were at less than values, i.e. was not detected on the breathing zone samples to within the laboratory limit of quantification (LOQ). Greatest measurement was less than (<) ppm; all measurements are therefore well below the OSHA action level for of. (TOHC) were measured on several personal samples having results ranging from 0.70 to 2.4 ppm TWA. All other measurements were less than values, i.e. TOHC were not detected on the breathing zone samples to within the laboratory limit of quantification (LOQ). There are no exposure limits for TOHC. Saturday, May 3 rd, th day of Clearing Operations in Ethylene Unit: On Saturday, May 3 rd, clearing operations were in their final stage. There were multiple areas in the ethylene unit where steam was venting from process facilities to atmosphere. Of the 28 personal samples collected over the day and night shifts, highest measured exposure to benzene was 0.23 ppm TWA. Additionally, there were five measurements ranging from 0.05 to 0.17 ppm TWA. Remaining measurements were less values, i.e. benzene was not detected on the personal samples to within the laboratory limit of quantification (LOQ). Of the 28 personal samples collected over the day and night shifts, all exposure measurements for were at less than values, i.e. was not detected on the breathing zone samples to within the laboratory limit of quantification (LOQ). Greatest measurement was less than (<) ppm; all measurements are therefore well below the OSHA action level for of. 1

19 (TOHC) were measured on five personal samples ranging from 0.72 to 8.6 ppm TWA. All other measurements were less than values, i.e. TOHC were not detected on the breathing zone samples to within the laboratory limit of quantification (LOQ). There are no exposure limits for TOHC. Conclusions Hygiene Sampling of Process Operators during Clearing Operations in Ethylene Unit: From Monday, April 28 th, 2014 to Sunday morning, May 4 th, 2014, Hagemeyer North America had collected a total of 168 personal samples on the process operators as they performed their job tasks associated with clearing operations in the ethylene unit. Only on the first day of clearing, Monday, April 28 th, 2014, did measured exposures exceed the OSHA permissible exposure limit (PEL) and action level for benzene of 1 ppm and, respectively. On this initial day, three operators had measured benzene exposures exceeding the OSHA PEL, and three operators had benzene exposures equaling or exceeding the OSHA action level of but less than the OSHA PEL of. Additionally, on Thursday, May 1 st, th day of clearing operations, one process operator had a benzene exposure of 0.47 ppm TWA nearly equaling the OSHA action level of. Therefore, Hagemeyer North America will submit in its final survey report a recommendation suggesting that DuPont interview operators of these action level and PEL cases to better scope their job activities and possible exposure sources. The goal of the interviews would be to better identify activities of the clearing operations which resulted in action level and PEL benzene exposures and evaluate those activities for 1) reducing exposure sources, and 2) requiring respiratory protection. Clearing operations are only performed during shut-down of the ethylene unit an event occurring once every few years. Job tasks and measured exposures of the hygiene sampling sessions from April 28 th through May 3 rd are therefore not routine occurring only every few years. Drafts of Employee Notification Letters: In the next week, Hagemeyer North America will prepare drafts of employee notification letters. Since many process operators had participated in multiple hygiene sampling sessions throughout the week of clearing operations, Hagemeyer will include all exposure measurements for each process operator into one employee notification letter. The drafts of employee notification letters are provided in order to assist DuPont SRW in informing its employees of their measured exposures to benzene, and total other hydrocarbons. DuPont should review and edit the drafts. Upon meeting its specific needs, DuPont should sign the notification letters and distribute them to the addressed employees. Thank you Carla for all your support and coordination of our hygiene sampling sessions at the ethylene unit of DuPont Sabine River Works, Orange, TX. I ll continue to send you preliminary reports as we receive laboratory analytical results from our hygiene samples collected during the turnaround of the ethylene unit. Tim Krill, CIH, CSP Hagemeyer North America Technical Services Group--EH&S Consulting and Training 6825 West Sam Houston Pkwy North Houston, TX cell 2

20 Tim Krill From: Sent: To: Subject: Tim Krill Tuesday, May 20, :04 PM Carla Brown Preliminary Report--Summary of Organic Vapor Exposure Measurements--DuPont Maintenance Personnel--1st Week of Turnaround Operations in Ethylene Unit--Tim Krill, Hagemeyer North America Hello Carla, Hagemeyer North America had just received all laboratory analytical results for our hygiene samples collected on the DuPont maintenance personnel during the first week of turnaround operations in the ethylene unit. From Monday, May 5 th through Saturday morning, May 10 th, Hagemeyer had collected 140 full-shift samples on DuPont maintenance personnel. During the first week of turnaround operations, these personnel were responsible for overseeing initial line breaks and the opening of process facilities such as gas compressors, valves, drums, columns, heaters, etc. The actual line breaks were performed by contract personnel. In general, DuPont maintenance personnel observed and monitored the activities from a distance and did not don respiratory protection. Hygiene sampling was continuously performed in the breathing zone (collar level) of DuPont maintenance personnel. Sampling was performed on day and night shifts from Monday, May 5 th 0600 hour to Saturday, May 10 th 0600 hour. Collected hygiene samples were expressed shipped daily to Galson Laboratories an AIHA accredited laboratory. All hygiene samples were analyzed for benzene, and total other hydrocarbon (TOHC) vapors. Summary of Exposures Measurements DuPont Maintenance Personnel Initial Week of Turnaround Operations: Of the 140 full-shift personal samples collected, there were no exposures that equaled or exceeded the OSHA action levels or permissible exposure limits (PELs) for benzene and. For both benzene and, OSHA enforces an action level and permissible exposure limit of and, respectively. Of the 140 full-shift personal samples, there were only 9 samples having detectable amounts of benzene. All other benzene measurements were at less than values, i.e. benzene was not detected on the samples to within the laboratory s limit of quantification (LOQ). Of the 9 samples/personnel having measurable benzene exposures, two personnel incurred benzene exposures of 0.27 ppm TWA and 0.2. Both of these personnel were DuPont maintenance mechanics. The seven remaining exposure measurements were 0. and less. Of the 9 samples/personnel having measurable benzene exposures, six personnel incurred exposures on Tuesday, May 6 th including the two maintenance mechanics having the exposures of 0.27 ppm and 0.21 ppm TWA. One person incurred a benzene exposure of 0.08 ppm TWA on Monday, May 5 th. On Friday, May 9 th, two maintenance persons had measured benzene exposures of 0.04 ppm TWA. Of the 140 full-shift personal samples collected, all measurements for were at less than values, i.e. was not detected on the personal samples to within the laboratory limit of quantification (LOQ). Of the 140 full-shift personal samples collected, there were only three samples having measurable amounts of total other hydrocarbon (TOHC) vapors. Measurements were 1.8 ppm, 1.3 ppm and 0.90 ppm TWA. All other TOHC measurements were at less than values, i.e. TOHC was not detected on the samples to within the laboratory limit of quantification (LOQ). There are no OSHA, NIOSH or ACGIH exposure limits for TOHC. 1

21 This concludes our preliminary reports for organic vapor exposure measurements. Please expect drafts of employee notification letters for the DuPont maintenance personnel next week. Thank you Carla for all your support and coordination of our hygiene sampling sessions for organic vapors at the turnaround project of the ethylene unit. Overall, everything went according to plan. Thank you, Tim Krill, CIH, CSP Hagemeyer North America Technical Services Group--EH&S Consulting and Training 6825 West Sam Houston Pkwy North Houston, TX cell 2

22 DuPont Sabine River Works, Orange, TX 08/11/14 Industrial Hygiene Sampling Sessions Ethylene Unit Turnaround 2014 APPENDIX B transmittal letters (4) for the sending of the drafts of employee notification letters, 4 pages. Letters transmitted May 21 st, 2014 at 2047 hr. CDT, May 22 nd, 2014 at 1331 hr. CDT, May 23 rd, 2014 at 1226 hr. CDT and May 23 rd, 2014 at 1541 hr. CDT. Hyperlinks (4) for downloading compressed zip files containing electronic files of drafts of employee notification letters: H AGE MEY E R N O R TH A M ERI CA

23 Tim Krill From: Tim Krill Sent: Wednesday, May 21, :47 PM To: Carla Brown Subject: Notification Letters--Day Shift--Clearing of Ethylene Unit--April 28th - May 3rd, Tim Krill, Hagemeyer North America Attachments: Notification letters--clearing of ethylene unit--day shift.zip Hello Carla, I re wrote the notification letters into the format sent to me this afternoon. For operators who participated in the April 28 th sampling session, I did include a paragraph explaining issuance of notification letters of the results on May 19 th. Very good; everything should be as we discussed. I ll send you the notification letters for the night shift operators of the ethylene unit clearing operations tomorrow. We ll talk later, Tim Krill, CIH, CSP Hagemeyer North America Technical Services Group EH&S Consulting and Training 6825 West Sam Houston Pkwy North Houston, TX cell 1

24 Tim Krill From: Tim Krill Sent: Thursday, May 22, :31 PM To: Carla Brown Subject: Employee Notification Letters--Clearing of Ethylene Unit--night shifts of April 29th - May 3rd--Tim Krill, Hagemeyer North America Attachments: Notification letters--clearing of ethylene unit--night shift.zip Hello Carla, The attached folder contains employee notification letters for DuPont process operators who worked the night shift during the clearing of the ethylene unit from April 29 th through May 3 rd, For operators who participated in the sampling session of Monday, April 28 th, I added a sentence explaining that notification letters of results from this sampling session were already issued on May 19 th, Many of the operators participated in five sampling sessions from April 29 th through May 3 rd. I reported results from multiple sampling sessions in one letter. Mr. Ronnie Broussard participated only in the sampling session of April 28 th ; therefore, there is no letter provided for him. His notification for April 28 th was already made on May 19 th. Very good Carla; I ll begin writing the notification letters for DuPont maintenance personnel who participated in sampling during the first week of turnaround operations, i.e. May 5 th 9 th, Tim Krill, CIH, CSP Hagemeyer North America Technical Services Group EH&S Consulting and Training 6825 West Sam Houston Pkwy North Houston, TX cell 1

25 Tim Krill From: Sent: To: Subject: Attachments: Tim Krill Friday, May 23, :26 PM Carla Brown Notification Letters--DuPont Maintenance Personnel of the Day Shift--May 5th through May 10th, 2014 Notification letters--dupont maintenance personnel--day shift.zip Hello Carla, The attached folder contains the notification letters for maintenance personnel of the day shift. These samples were collected from Monday, May 5 th through Saturday morning May 10 th. In the case of the last names of Hoang and Vincent, I noticed we had multiple people. Therefore, with the last names of Hoang and Vincent, I also included first names in the file name. I also noted that in the notification letters, the DuPont result/exposure limit table shows the DuPont AEL for 1,3- butadiene as 1 ppm. Should not the DuPont AEL (action exposure limit) be 0.5 ppm? The OSHA action level for 1,3- butadiene is. Very good Carla; I expect to finish the notification letters for the night shift maintenance personnel today. Thanks; have a very good holiday weekend, Tim Krill, CIH, CSP Hagemeyer North America Technical Services Group--EH&S Consulting and Training 6825 West Sam Houston Pkwy North Houston, TX cell 1

26 Tim Krill From: Sent: To: Subject: Attachments: Tim Krill Friday, May 23, :41 PM Carla Brown Employee notification letters--dupont maintenance personnel of night shift--may 5th through May 10th, 2014 Notification letters--dupont maintenance personnel--night shift.zip; Preliminary Reports--IH sampling project of ethylene unit--clearing operations and 1st week of turnaround--april 28 - May 10, 2014.pdf Hello Carla, The attached folder contains the employee notification letters for maintenance personnel of the night shift. These sampling results were obtained from Monday, May 5 th through Saturday morning May 10 th. In the case of the last name of Vincent, we had multiple people. Therefore, with this last name, I also included first names in the file names. This concludes issuing of our employee notification letters. I wanted to deliver these letters to you without further delay. You have the findings and conclusions from our IH sampling project delivered via the preliminary reports. A final survey report with all supportive documentation will be issued in a few weeks. Thank you Carla; have a great weekend, Tim Krill, CIH, CSP Hagemeyer North America Technical Services Group--EH&S Consulting and Training 6825 West Sam Houston Pkwy North Houston, TX cell 1

27 DuPont Sabine River Works, Orange, TX 08/11/14 Industrial Hygiene Sampling Sessions Ethylene Unit Turnaround 2014 APPENDIX C Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Monday, April 28 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Tuesday, April 29 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Wednesday, April 30 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Thursday, May 1 st, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Friday, May 2 nd, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Saturday, May 3 rd, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Monday, May 5 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Tuesday, May 6 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Wednesday, May 7 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Thursday, May 8 th, Signed chain of custody records for sample submission. 12 pages. Galson Laboratories Analysis Report Login # L Analysis of personal samples collected on Friday, May 9 th, Signed chain of custody records for sample submission. 12 pages. AIHA Certificates of Laboratory Accreditation for Galson Laboratories, 6601 Kirkville Road, East Syracuse, New York, 3 pages. H AGE MEY E R N O R TH A M ERI CA

28 Mr. Tim Krill, CIH, CSP May 08, 2014 Risk Management & Safety Services 9203 Highway 6 South Suite 124 Houston, TX DOH ELAP# Account# Login# L AIHA # Dear Mr. Krill: Enclosed are the analytical results for the samples received by our laboratory on May 01, All test results meet the quality control requirements of AIHA and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted. Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report, with the exception of IOMs, which will be cleaned and disposed of after seven calendar days. Current Scopes of Accreditation can be viewed at in the accreditations section under the "about Galson" tab. Please contact Caroline Hudson at (888) , if you would like any additional information regarding this report. Thank you for using Galson Laboratories. Sincerely, Galson Laboratories [qcsig] Mary G. Unangst Laboratory Director Enclosure(s) Page 1 of 12 Report Reference:1 Generated:08-MAY-14 12:26

29 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, TX East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 28-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L < L < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 <0.065 NJ9236 L <2.5 <2.5 <3.3 <0.15 <0.066 NJ8779 L <2.5 <2.5 <3.3 <0.15 <0.066 NJ9383 L <2.5 <2.5 <3.3 <0.14 <0.065 NJ8788 L <2.5 <2.5 <3.3 <0.15 <0.066 NJ8915 L <2.5 <2.5 <3.3 <0.14 <0.064 NJ9206 L <2.5 <2.5 <3.3 <0.15 <0.066 NJ9450 L <2.5 <2.5 <3.3 <0.14 <0.064 NJ9203 L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.18 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 <0.066 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: SAB Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 2 of 12 Report Reference:1 Generated:08-MAY-14 12:26

30 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, TX East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 28-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 <0.061 LAB BLANK L NA <2.5 <2.5 <3.3 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: SAB Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 3 of 12 Report Reference:1 Generated:08-MAY-14 12:26

31 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, TX East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 28-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L < L < L <2 <2 <2 <0.1 < L < L < L < L <2 <2 <2 <0.1 <0.03 NJ9236 L < NJ8779 L < NJ9383 L < NJ8788 L < NJ8915 L < NJ9206 L < NJ9450 L < NJ9203 L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L < L <2 <2 <2 <0.1 < L < L < COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: SAB Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 4 of 12 Report Reference:1 Generated:08-MAY-14 12:26

32 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, TX East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 28-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L < L < L < L < L < L < L <2 <2 <2 <0.1 < L < LAB BLANK L NA <2 <2 <2 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: SAB Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 5 of 12 Report Reference:1 Generated:08-MAY-14 12:26

33 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, TX East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 28-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L < L < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 <0.65 NJ9236 L <40 <40 <40 <2.3 <0.66 NJ8779 L <40 <40 <40 <2.3 <0.67 NJ9383 L < NJ8788 L <40 <40 <40 <2.3 <0.66 NJ8915 L <40 <40 <40 <2.3 <0.65 NJ9206 L < NJ9450 L <40 <40 <40 <2.3 <0.65 NJ9203 L <40 <40 <40 <2.3 < L <40 <40 <40 <2.9 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 <0.66 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: SAB Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : dnf OSHA PEL (TWA) : NA Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 6 of 12 Report Reference:1 Generated:08-MAY-14 12:26

34 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, TX East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 28-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.3 < L < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 <0.62 LAB BLANK L NA <40 <40 <40 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: SAB Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : dnf OSHA PEL (TWA) : NA Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 7 of 12 Report Reference:1 Generated:08-MAY-14 12:26

35 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, TX Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 28-APR-14 Account No.: (315) Date Received: 01-MAY-14 Login No. : L FAX: (315) Date Analyzed: 02-MAY MAY-14 Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results. Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported. The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable). Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank. L (Report ID: ): Total ug corrected for concentration-dependent desorption efficiencies ranging from 75 to 88%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery 1,3-Butadiene +/-28.4% 94% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery +/-6.4% 94.1% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) The total VOC analysis should be used for screening purposes only. All values are estimated based on the response of n-hexane. The sample extracts will be kept for a maximum of 30 days from the receipt date. Please contact client services in regards to the re-analysis of the sample(s) for the tentatively identified compounds. For the sample(s) that are non-detect no tentative identifications will be provided. L (Report ID: ): Tentative Identification includes: Toluene and unknown other volatile organic compounds. < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 8 of 12 Report Reference:1 Generated:08-MAY-14 12:26

36 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, TX Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 28-APR-14 Account No.: (315) Date Received: 01-MAY-14 Login No. : L FAX: (315) Date Analyzed: 02-MAY MAY-14 L (Report ID: : Tentative Identification includes: Ethanol and unknown other volatile organic compounds. L (Report ID: : Tentative Identification includes: Ethanol and unknown other volatile organic compounds. L (Report ID: ): Tentative Identification includes: unknown volatile organic compounds. L (Report ID: : Tentative Identification includes: Ethanol and unknown other volatile organic compounds. L (Report ID: : Tentative Identification includes: Ethanol and unknown other volatile organic compounds. L (Report ID: ): Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery Other Total Hydrocarbons +/-16.7% 100% < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 9 of 12 Report Reference:1 Generated:08-MAY-14 12:26

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40 Mr. Tim Krill, CIH, CSP May 08, 2014 Risk Management & Safety Services 9203 Highway 6 South Suite 124 Houston, TX DOH ELAP# Account# Login# L AIHA # Dear Mr. Krill: Enclosed are the analytical results for the samples received by our laboratory on May 01, All test results meet the quality control requirements of AIHA and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted. Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report, with the exception of IOMs, which will be cleaned and disposed of after seven calendar days. Current Scopes of Accreditation can be viewed at in the accreditations section under the "about Galson" tab. Please contact Caroline Hudson at (888) , if you would like any additional information regarding this report. Thank you for using Galson Laboratories. Sincerely, Galson Laboratories [qcsig] Mary G. Unangst Laboratory Director Enclosure(s) Page 1 of 12 Report Reference:1 Generated:08-MAY-14 13:15

41 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 29-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 <0.064 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: mln Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 2 of 12 Report Reference:1 Generated:08-MAY-14 13:15

42 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 29-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 <0.062 LAB BLANK L NA <2.5 <2.5 <3.3 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: mln Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 3 of 12 Report Reference:1 Generated:08-MAY-14 13:15

43 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 29-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L < L < L < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.1 < L < L < L <2 <2 <2 <0.1 < L < L < L < L < L < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L < L < L <2 <2 <2 <0.1 <0.03 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: mln Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 4 of 12 Report Reference:1 Generated:08-MAY-14 13:15

44 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 29-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < LAB BLANK L NA <2 <2 <2 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: mln Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 5 of 12 Report Reference:1 Generated:08-MAY-14 13:15

45 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 29-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.5 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.2 <0.62 * 8830 L *140 *8.0 * L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.0 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 <0.64 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: mln Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 6 of 12 Report Reference:1 Generated:08-MAY-14 13:15

46 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 29-APR-14 Account No.: Date Received : 01-MAY-14 Login No. : L Date Analyzed : 02-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.0 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.4 < L < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 <0.62 LAB BLANK L NA <40 <40 <40 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: mln Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 08-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 7 of 12 Report Reference:1 Generated:08-MAY-14 13:15

47 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 29-APR-14 Account No.: (315) Date Received: 01-MAY-14 Login No. : L FAX: (315) Date Analyzed: 02-MAY MAY-14 Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results. Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported. The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable). Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank. L (Report ID: ): Total ug corrected for a desorption efficiency of 75%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery 1,3-Butadiene +/-28.4% 94% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery +/-6.4% 94.1% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) The total VOC analysis should be used for screening purposes only. All values are estimated based on the response of n-hexane. The sample extracts will be kept for a maximum of 30 days from the receipt date. Please contact client services in regards to the re-analysis of the sample(s) for the tentatively identified compounds. For the sample(s) that are non-detect no tentative identifications will be provided. * L (Report ID: ): Results reported as (*) designate possible breakthrough or migration. < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 8 of 12 Report Reference:1 Generated:08-MAY-14 13:15

48 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 29-APR-14 Account No.: (315) Date Received: 01-MAY-14 Login No. : L FAX: (315) Date Analyzed: 02-MAY MAY-14 * L (Report ID: ): Reported result may be biased low. L (Report ID: : Tentative identification includes: Ethyl Alcohol and unidentified other volatile compounds. L (Report ID: ): Tentative identification includes: unidentified other volatile compounds. L (Report ID: ): Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery Other Total Hydrocarbons +/-16.7% 100% < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 9 of 12 Report Reference:1 Generated:08-MAY-14 13:15

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52 Mr. Tim Krill May 12, 2014 Risk Management & Safety Services 9203 Highway 6 South Suite 124 Houston, TX DOH ELAP #11626 Account# Login# L AIHA-LAP # Dear Mr. Krill: Enclosed are the analytical results for the samples received by our laboratory on May 03, All test results meet the quality control requirements of AIHA-LAP and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted. Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report, with the exception of IOMs, which will be cleaned and disposed of after seven calendar days. Current Scopes of Accreditation can be viewed at in the accreditations section under the "about Galson" tab. Please contact Caroline Hudson at (888) , if you would like any additional information regarding this report. Thank you for using Galson Laboratories. Sincerely, Galson Laboratories [qcsig] Mary G. Unangst Laboratory Director Enclosure(s) Page 1 of 12 Report Reference:1 Generated:12-MAY-14 12:17

53 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 30-APR-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 <0.061 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: BDK Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Karen Becker < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 2 of 12 Report Reference:1 Generated:12-MAY-14 12:17

54 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 30-APR-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L NA <2.5 <2.5 <3.3 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: BDK Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Karen Becker < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 3 of 12 Report Reference:1 Generated:12-MAY-14 12:17

55 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 30-APR-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 <0.03 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: BDK Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Karen Becker < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 4 of 12 Report Reference:1 Generated:12-MAY-14 12:17

56 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 30-APR-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L < L < L < L NA <2 <2 <2 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: BDK Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Karen Becker < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 5 of 12 Report Reference:1 Generated:12-MAY-14 12:17

57 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 30-APR-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.2 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L < L < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.0 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 <0.61 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: BDK Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Karen Becker < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 6 of 12 Report Reference:1 Generated:12-MAY-14 12:17

58 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 30-APR-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.0 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.1 < L NA <40 <40 <40 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: BDK Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Karen Becker < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 7 of 12 Report Reference:1 Generated:12-MAY-14 12:17

59 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 30-APR-14 Account No.: (315) Date Received: 03-MAY-14 Login No. : L FAX: (315) Date Analyzed: 06-MAY MAY-14 Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results. Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported. The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable). Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank. L (Report ID: ): Total ug corrected for a desorption efficiency ranging from 75 to 89%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery 1,3-Butadiene +/-28.4% 94% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery +/-6.4% 94.1% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) The total VOC analysis should be used for screening purposes only. All values are estimated based on the response of n-hexane. The sample extracts will be kept for a maximum of 30 days from the receipt date. Please contact client services in regards to the re-analysis of the sample(s) for the tentatively identified compounds. For the sample(s) that are non-detect no tentative identifications will be provided. L (Report ID: ): Tentative Identification includes: Ethyl Alcohol and other unknown volatile organic compounds. < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 8 of 12 Report Reference:1 Generated:12-MAY-14 12:17

60 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 30-APR-14 Account No.: (315) Date Received: 03-MAY-14 Login No. : L FAX: (315) Date Analyzed: 06-MAY MAY-14 L (Report ID: ): Tentative Identification includes: Ethyl Alcohol, Isopropyl Alcohol and other unknown volatile organic compounds. L (Report ID: ): Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery Other Total Hydrocarbons +/-16.7% 100% < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 9 of 12 Report Reference:1 Generated:12-MAY-14 12:17

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64 Mr. Tim Krill May 12, 2014 Risk Management & Safety Services 9203 Highway 6 South Suite 124 Houston, TX DOH ELAP #11626 Account# Login# L AIHA-LAP # Dear Mr. Krill: Enclosed are the analytical results for the samples received by our laboratory on May 03, All test results meet the quality control requirements of AIHA-LAP and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted. Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report, with the exception of IOMs, which will be cleaned and disposed of after seven calendar days. Current Scopes of Accreditation can be viewed at in the accreditations section under the "about Galson" tab. Please contact Caroline Hudson at (888) , if you would like any additional information regarding this report. Thank you for using Galson Laboratories. Sincerely, Galson Laboratories [qcsig] Mary G. Unangst Laboratory Director Enclosure(s) Page 1 of 12 Report Reference:1 Generated:12-MAY-14 14:28

65 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 01-MAY-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.12 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.12 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 <0.060 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: ARE/BDK Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 2 of 12 Report Reference:1 Generated:12-MAY-14 14:28

66 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 01-MAY-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.12 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L NA <2.5 <2.5 <3.3 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: ARE/BDK Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 3 of 12 Report Reference:1 Generated:12-MAY-14 14:28

67 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 01-MAY-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L < L < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.1 < L < L < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.09 < L < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 <0.03 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: ARE Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 4 of 12 Report Reference:1 Generated:12-MAY-14 14:28

68 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 01-MAY-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L NA <2 <2 <2 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: ARE Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 5 of 12 Report Reference:1 Generated:12-MAY-14 14:28

69 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 01-MAY-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.2 < L < L <40 <40 <40 <2.1 < L < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.3 < L <40 <40 <40 <1.9 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.0 < L <40 <40 <40 <2.2 < L < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.0 < L <40 <40 <40 <2.0 < L < COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: ARE Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 6 of 12 Report Reference:1 Generated:12-MAY-14 14:28

70 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 01-MAY-14 Account No.: Date Received : 03-MAY-14 Login No. : L Date Analyzed : 06-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <1.9 < L < L <40 <40 <40 <2.2 < L < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.4 < L NA <40 <40 <40 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: ARE Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 12-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 7 of 12 Report Reference:1 Generated:12-MAY-14 14:28

71 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 01-MAY-14 Account No.: (315) Date Received: 03-MAY-14 Login No. : L FAX: (315) Date Analyzed: 06-MAY MAY-14 Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results. Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported. The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable). Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank. L (Report ID: ): Total ug corrected for a desorption efficiency of 75%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery 1,3-Butadiene +/-28.4% 94% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery +/-6.4% 94.1% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) The total VOC analysis should be used for screening purposes only. All values are estimated based on the response of n-hexane. The sample extracts will be kept for a maximum of 30 days from the receipt date. Please contact client services in regards to the re-analysis of the sample(s) for the tentatively identified compounds. For the sample(s) that are non-detect no tentative identifications will be provided. L (Report ID: : Tentative Identification includes: Ethyl Alcohol and other unknown volatile organic compounds. < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 8 of 12 Report Reference:1 Generated:12-MAY-14 14:28

72 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 01-MAY-14 Account No.: (315) Date Received: 03-MAY-14 Login No. : L FAX: (315) Date Analyzed: 06-MAY MAY-14 L (Report ID: ): Tentative identification includes: Toluene, Ethyl Alcohol, and other unidentified volatile compounds. L (Report ID: : Tentative identification includes: Toluene and other unidentified volatile compounds. L (Report ID: : Tentative identification includes: Toluene, Ethyl Alcohol, and other unidentified volatile compounds. L (Report ID: : Tentative identification includes: Toluene, Ethyl Alcohol, and other unidentified volatile compounds. L (Report ID: ): Tentative Identification includes: Ethyl Alcohol and other unknown volatile organic compounds. L (Report ID: ): Tentative Identification includes: Ethyl Alcohol and other unknown volatile organic compounds. L (Report ID: ): Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery Other Total Hydrocarbons +/-16.7% 100% < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 9 of 12 Report Reference:1 Generated:12-MAY-14 14:28

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76 Mr. Tim Krill May 13, 2014 Risk Management & Safety Services 9203 Highway 6 South Suite 124 Houston, TX DOH ELAP #11626 Account# Login# L AIHA-LAP # Dear Mr. Krill: Enclosed are the analytical results for the samples received by our laboratory on May 06, All test results meet the quality control requirements of AIHA-LAP and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted. Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report, with the exception of IOMs, which will be cleaned and disposed of after seven calendar days. Current Scopes of Accreditation can be viewed at in the accreditations section under the "about Galson" tab. Please contact Caroline Hudson at (888) , if you would like any additional information regarding this report. Thank you for using Galson Laboratories. Sincerely, Galson Laboratories [qcsig] Mary G. Unangst Laboratory Director Enclosure(s) Page 1 of 12 Report Reference:1 Generated:13-MAY-14 13:22

77 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 02-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 <0.062 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: BDK Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 2 of 12 Report Reference:1 Generated:13-MAY-14 13:22

78 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 02-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L NA <2.5 <2.5 <3.3 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: BDK Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 3 of 12 Report Reference:1 Generated:13-MAY-14 13:22

79 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 02-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.1 <0.03 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: BDK Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 4 of 12 Report Reference:1 Generated:13-MAY-14 13:22

80 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 02-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L NA <2 <2 <2 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: BDK Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 5 of 12 Report Reference:1 Generated:13-MAY-14 13:22

81 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 02-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.2 < L < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.0 < L < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.1 < L < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.0 < L <40 <40 <40 <2.2 <0.63 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: BDK Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : dnf OSHA PEL (TWA) : NA Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 6 of 12 Report Reference:1 Generated:13-MAY-14 13:22

82 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 02-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.4 < L < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.1 < L < L < L < L NA <40 <40 <40 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: BDK Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : dnf OSHA PEL (TWA) : NA Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 7 of 12 Report Reference:1 Generated:13-MAY-14 13:22

83 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 02-MAY-14 Account No.: (315) Date Received: 06-MAY-14 Login No. : L FAX: (315) Date Analyzed: 08-MAY MAY-14 Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results. Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported. The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable). Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank. L (Report ID: ): Total ug corrected for a desorption efficiency of 75%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery 1,3-Butadiene +/-28.4% 94% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery +/-6.4% 94.1% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) The total VOC analysis should be used for screening purposes only. All values are estimated based on the response of n-hexane. The sample extracts will be kept for a maximum of 30 days from the receipt date. Please contact client services in regards to the re-analysis of the sample(s) for the tentatively identified compounds. For the sample(s) that are non-detect no tentative identifications will be provided. L (Report ID: : Tentative Identification includes: Ethanol, Isopropyl Alcohol and other unknown volatile < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 8 of 12 Report Reference:1 Generated:13-MAY-14 13:22

84 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 02-MAY-14 Account No.: (315) Date Received: 06-MAY-14 Login No. : L FAX: (315) Date Analyzed: 08-MAY MAY-14 L (Report ID: : organic compounds. L (Report ID: ): Tentative Identification includes: Ethanol and other unknown volatile organic compounds. L (Report ID: : Tentative Identification includes: Ethanol and other unknown volatile organic compounds. L (Report ID: : Tentative Identification includes: Ethanol and other unknown volatile organic compounds. L (Report ID: : Tentative Identification includes: Ethanol and other unknown volatile organic compounds. L (Report ID: : Tentative Identification includes: Ethanol and other unknown volatile organic compounds. L (Report ID: ): Tentative Identification includes: Ethanol, Toluene and other unknown volatile organic compounds. L (Report ID: ): Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery Other Total Hydrocarbons +/-16.7% 100% < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 9 of 12 Report Reference:1 Generated:13-MAY-14 13:22

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88 Mr. Tim Krill May 13, 2014 Risk Management & Safety Services 9203 Highway 6 South Suite 124 Houston, TX DOH ELAP #11626 Account# Login# L AIHA-LAP # Dear Mr. Krill: Enclosed are the analytical results for the samples received by our laboratory on May 06, All test results meet the quality control requirements of AIHA-LAP and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted. Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report, with the exception of IOMs, which will be cleaned and disposed of after seven calendar days. Current Scopes of Accreditation can be viewed at in the accreditations section under the "about Galson" tab. Please contact Caroline Hudson at (888) , if you would like any additional information regarding this report. Thank you for using Galson Laboratories. Sincerely, Galson Laboratories [qcsig] Mary G. Unangst Laboratory Director Enclosure(s) Page 1 of 12 Report Reference:1 Generated:13-MAY-14 12:50

89 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 03-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 <0.065 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: mln Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : tlh OSHA PEL : 1 ppm (TWA) Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 2 of 12 Report Reference:1 Generated:13-MAY-14 12:50

90 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 03-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.12 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L NA <2.5 <2.5 <3.3 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: mln Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : tlh OSHA PEL : 1 ppm (TWA) Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 3 of 12 Report Reference:1 Generated:13-MAY-14 12:50

91 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 03-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.1 < L < L < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 <0.03 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: mln Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : tlh OSHA PEL : 1 ppm (TWA) Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 4 of 12 Report Reference:1 Generated:13-MAY-14 12:50

92 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 03-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L NA <2 <2 <2 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: mln Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : tlh OSHA PEL : 1 ppm (TWA) Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 5 of 12 Report Reference:1 Generated:13-MAY-14 12:50

93 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 03-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.4 < L < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.0 < L <40 <40 <40 <2.2 < L *340 *19 * L *590 *30 * L <40 44 *97 *5.5 * L <40 <40 <40 <2.2 < L <40 <40 <40 <2.3 <0.65 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: mln Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : tlh OSHA PEL (TWA) : NA Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 6 of 12 Report Reference:1 Generated:13-MAY-14 12:50

94 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 03-MAY-14 Account No.: Date Received : 06-MAY-14 Login No. : L Date Analyzed : 08-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.0 < L <40 <40 <40 <1.9 < L <40 <40 <40 <2.1 < L < L <40 <40 <40 <2.3 < L NA <40 <40 <40 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: mln Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : tlh OSHA PEL (TWA) : NA Date : 13-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tony D'Amico < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 7 of 12 Report Reference:1 Generated:13-MAY-14 12:50

95 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 03-MAY-14 Account No.: (315) Date Received: 06-MAY-14 Login No. : L FAX: (315) Date Analyzed: 08-MAY MAY-14 Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results. Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported. The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable). Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank. L (Report ID: ): Total ug corrected for a desorption efficiency of 75%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery 1,3-Butadiene +/-28.4% 94% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery +/-6.4% 94.1% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) The total VOC analysis should be used for screening purposes only. All values are estimated based on the response of n-hexane. The sample extracts will be kept for a maximum of 30 days from the receipt date. Please contact client services in regards to the re-analysis of the sample(s) for the tentatively identified compounds. For the sample(s) that are non-detect no tentative identifications will be provided. Results reported as (*) designate possible breakthrough or migration. Reported result may be biased low. L (Report ID: : Tentative identification includes: Ethyl Alcohol and unidentified volatile compounds. < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 8 of 12 Report Reference:1 Generated:13-MAY-14 12:50

96 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 03-MAY-14 Account No.: (315) Date Received: 06-MAY-14 Login No. : L FAX: (315) Date Analyzed: 08-MAY MAY-14 L (Report ID: : Tentative identification includes: Ethyl Alcohol and unidentified volatile compounds. L (Report ID: : Tentative identification includes: Ethyl Alcohol and unidentified volatile compounds. Results have been verified. Front media contained similar peaks at lower levels. L (Report ID: ): Tentative identification includes: Ethyl Alcohol, Isopropyl Alcohol and unidentified volatile compounds. L (Report ID: : Tentative identification includes: Ethyl Alcohol and unidentified volatile compounds. L (Report ID: ): Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery Other Total Hydrocarbons +/-16.7% 100% < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 9 of 12 Report Reference:1 Generated:13-MAY-14 12:50

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100 Mr. Tim Krill May 15, 2014 Risk Management & Safety Services 9203 Highway 6 South Suite 124 Houston, TX DOH ELAP #11626 Account# Login# L AIHA-LAP # Dear Mr. Krill: Enclosed are the analytical results for the samples received by our laboratory on May 08, All test results meet the quality control requirements of AIHA-LAP and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted. Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report, with the exception of IOMs, which will be cleaned and disposed of after seven calendar days. Current Scopes of Accreditation can be viewed at in the accreditations section under the "about Galson" tab. Please contact Caroline Hudson at (888) , if you would like any additional information regarding this report. Thank you for using Galson Laboratories. Sincerely, Galson Laboratories [qcsig] Mary G. Unangst Laboratory Director Enclosure(s) Page 1 of 12 Report Reference:1 Generated:15-MAY-14 15:33

101 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 05-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 <0.069 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: ARE Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 2 of 12 Report Reference:1 Generated:15-MAY-14 15:33

102 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 05-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.15 < L NA <2.5 <2.5 <3.3 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: ARE Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 3 of 12 Report Reference:1 Generated:15-MAY-14 15:33

103 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 05-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 <0.03 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: ARE Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 4 of 12 Report Reference:1 Generated:15-MAY-14 15:33

104 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 05-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L NA <2 <2 <2 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: ARE Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 5 of 12 Report Reference:1 Generated:15-MAY-14 15:33

105 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 05-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.6 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.6 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.6 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.5 <0.70 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: ARE Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 6 of 12 Report Reference:1 Generated:15-MAY-14 15:33

106 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 05-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.2 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.4 < L NA <40 <40 <40 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: ARE Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Tom Burgess < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 7 of 12 Report Reference:1 Generated:15-MAY-14 15:33

107 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 05-MAY-14 Account No.: (315) Date Received: 08-MAY-14 Login No. : L FAX: (315) Date Analyzed: 09-MAY MAY-14 Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results. Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported. The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable). Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank. L (Report ID: ): Total ug corrected for a desorption efficiency of 75%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery 1,3-Butadiene +/-28.4% 94% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery +/-6.4% 94.1% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) The total VOC analysis should be used for screening purposes only. All values are estimated based on the response of n-hexane. The sample extracts will be kept for a maximum of 30 days from the receipt date. Please contact client services in regards to the re-analysis of the sample(s) for the tentatively identified compounds. For the sample(s) that are non-detect no tentative identifications will be provided. < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 8 of 12 Report Reference:1 Generated:15-MAY-14 15:33

108 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 05-MAY-14 Account No.: (315) Date Received: 08-MAY-14 Login No. : L FAX: (315) Date Analyzed: 09-MAY MAY-14 Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery Other Total Hydrocarbons +/-16.7% 100% < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 9 of 12 Report Reference:1 Generated:15-MAY-14 15:33

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112 Mr. Tim Krill May 15, 2014 Risk Management & Safety Services 9203 Highway 6 South Suite 124 Houston, TX DOH ELAP #11626 Account# Login# L AIHA-LAP # Dear Mr. Krill: Enclosed are the analytical results for the samples received by our laboratory on May 08, All test results meet the quality control requirements of AIHA-LAP and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted. Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report, with the exception of IOMs, which will be cleaned and disposed of after seven calendar days. Current Scopes of Accreditation can be viewed at in the accreditations section under the "about Galson" tab. Please contact Caroline Hudson at (888) , if you would like any additional information regarding this report. Thank you for using Galson Laboratories. Sincerely, Galson Laboratories [qcsig] Mary G. Unangst Laboratory Director Enclosure(s) Page 1 of 12 Report Reference:1 Generated:15-MAY-14 14:17

113 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 06-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.15 <0.067 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: BDK Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 2 of 12 Report Reference:1 Generated:15-MAY-14 14:17

114 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 06-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.14 < L NA <2.5 <2.5 <3.3 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: BDK Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 3 of 12 Report Reference:1 Generated:15-MAY-14 14:17

115 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 06-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L < L < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.09 < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 <0.03 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: BDK Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 4 of 12 Report Reference:1 Generated:15-MAY-14 14:17

116 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 06-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L NA <2 <2 <2 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: BDK Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 5 of 12 Report Reference:1 Generated:15-MAY-14 14:17

117 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 06-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.3 < L < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.6 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.6 < L <40 <40 <40 <2.4 <0.67 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: BDK Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : dnf OSHA PEL (TWA) : NA Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 6 of 12 Report Reference:1 Generated:15-MAY-14 14:17

118 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 06-MAY-14 Account No.: Date Received : 08-MAY-14 Login No. : L Date Analyzed : 09-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.5 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.3 < L NA <40 <40 <40 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: BDK Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : dnf OSHA PEL (TWA) : NA Date : 15-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 7 of 12 Report Reference:1 Generated:15-MAY-14 14:17

119 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 06-MAY-14 Account No.: (315) Date Received: 08-MAY-14 Login No. : L FAX: (315) Date Analyzed: 09-MAY MAY-14 Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results. Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported. The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable). Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank. L (Report ID: ): Total ug corrected for a desorption efficiency of 75%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery 1,3-Butadiene +/-28.4% 94% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery +/-6.4% 94.1% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) The total VOC analysis should be used for screening purposes only. All values are estimated based on the response of n-hexane. The sample extracts will be kept for a maximum of 30 days from the receipt date. Please contact client services in regards to the re-analysis of the sample(s) for the tentatively identified compounds. For the sample(s) that are non-detect no tentative identifications will be provided. L (Report ID: ): Tentative Identification includes: Other unknown volatile organic compounds. < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 8 of 12 Report Reference:1 Generated:15-MAY-14 14:17

120 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 06-MAY-14 Account No.: (315) Date Received: 08-MAY-14 Login No. : L FAX: (315) Date Analyzed: 09-MAY MAY-14 Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery Other Total Hydrocarbons +/-16.7% 100% < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 9 of 12 Report Reference:1 Generated:15-MAY-14 14:17

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124 Mr. Tim Krill May 19, 2014 Risk Management & Safety Services 9203 Highway 6 South Suite 124 Houston, TX DOH ELAP #11626 Account# Login# L AIHA-LAP # Dear Mr. Krill: Enclosed are the analytical results for the samples received by our laboratory on May 10, All test results meet the quality control requirements of AIHA-LAP and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted. Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report, with the exception of IOMs, which will be cleaned and disposed of after seven calendar days. Current Scopes of Accreditation can be viewed at in the accreditations section under the "about Galson" tab. Please contact Caroline Hudson at (888) , if you would like any additional information regarding this report. Thank you for using Galson Laboratories. Sincerely, Galson Laboratories [qcsig] Mary G. Unangst Laboratory Director Enclosure(s) Page 1 of 12 Report Reference:1 Generated:19-MAY-14 14:33

125 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 07-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 <0.070 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: mln Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 2 of 12 Report Reference:1 Generated:19-MAY-14 14:33

126 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 07-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.16 < L NA <2.5 <2.5 <3.3 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: mln Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 3 of 12 Report Reference:1 Generated:19-MAY-14 14:33

127 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 07-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 <0.03 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: mln Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 4 of 12 Report Reference:1 Generated:19-MAY-14 14:33

128 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 07-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L NA <2 <2 <2 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: mln Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 5 of 12 Report Reference:1 Generated:19-MAY-14 14:33

129 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 07-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.2 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.6 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.5 <0.70 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: mln Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 6 of 12 Report Reference:1 Generated:19-MAY-14 14:33

130 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 07-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.3 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.5 < L NA <40 <40 <40 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: mln Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 7 of 12 Report Reference:1 Generated:19-MAY-14 14:33

131 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 07-MAY-14 Account No.: (315) Date Received: 10-MAY-14 Login No. : L FAX: (315) Date Analyzed: 13-MAY MAY-14 Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results. Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported. The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable). Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank. L (Report ID: ): Total ug corrected for a desorption efficiency of 75%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery 1,3-Butadiene +/-28.4% 94% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery +/-6.4% 94.1% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) The total VOC analysis should be used for screening purposes only. All values are estimated based on the response of n-hexane. The sample extracts will be kept for a maximum of 30 days from the receipt date. Please contact client services in regards to the re-analysis of the sample(s) for the tentatively identified compounds. For the sample(s) that are non-detect no tentative identifications will be provided. < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 8 of 12 Report Reference:1 Generated:19-MAY-14 14:33

132 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 07-MAY-14 Account No.: (315) Date Received: 10-MAY-14 Login No. : L FAX: (315) Date Analyzed: 13-MAY MAY-14 Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery Other Total Hydrocarbons +/-16.7% 100% < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 9 of 12 Report Reference:1 Generated:19-MAY-14 14:33

133 Page 10 of 12 Report Reference:1 Generated:19-MAY-14 14:33

134 Page 11 of 12 Report Reference:1 Generated:19-MAY-14 14:33

135 Page 12 of 12 Report Reference:1 Generated:19-MAY-14 14:33

136 Mr. Tim Krill May 19, 2014 Risk Management & Safety Services 9203 Highway 6 South Suite 124 Houston, TX DOH ELAP #11626 Account# Login# L AIHA-LAP # Dear Mr. Krill: Enclosed are the analytical results for the samples received by our laboratory on May 10, All test results meet the quality control requirements of AIHA-LAP and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted. Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report, with the exception of IOMs, which will be cleaned and disposed of after seven calendar days. Current Scopes of Accreditation can be viewed at in the accreditations section under the "about Galson" tab. Please contact Caroline Hudson at (888) , if you would like any additional information regarding this report. Thank you for using Galson Laboratories. Sincerely, Galson Laboratories [qcsig] Mary G. Unangst Laboratory Director Enclosure(s) Page 1 of 12 Report Reference:1 Generated:19-MAY-14 15:34

137 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 08-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.17 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.18 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.15 <0.069 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: ARE Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 2 of 12 Report Reference:1 Generated:19-MAY-14 15:34

138 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 08-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.13 < L NA <2.5 <2.5 <3.3 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: ARE Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 3 of 12 Report Reference:1 Generated:19-MAY-14 15:34

139 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 08-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 <0.03 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: ARE Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 4 of 12 Report Reference:1 Generated:19-MAY-14 15:34

140 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 08-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L NA <2 <2 <2 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: ARE Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : nkp OSHA PEL : 1 ppm (TWA) Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 5 of 12 Report Reference:1 Generated:19-MAY-14 15:34

141 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 08-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.1 < L < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.7 < L <40 <40 <40 <2.6 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.9 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.6 < L <40 <40 <40 <2.5 <0.70 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: ARE Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 6 of 12 Report Reference:1 Generated:19-MAY-14 15:34

142 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Turnaround (315) FAX: (315) Date Sampled : 08-MAY-14 Account No.: Date Received : 10-MAY-14 Login No. : L Date Analyzed : 13-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.6 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.5 < L < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.1 < L NA <40 <40 <40 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: ARE Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : nkp OSHA PEL (TWA) : NA Date : 19-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 7 of 12 Report Reference:1 Generated:19-MAY-14 15:34

143 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 08-MAY-14 Account No.: (315) Date Received: 10-MAY-14 Login No. : L FAX: (315) Date Analyzed: 13-MAY MAY-14 Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results. Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported. The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable). Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank. L (Report ID: ): Total ug corrected for a desorption efficiency of 75%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery 1,3-Butadiene +/-28.4% 94% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery +/-6.4% 94.1% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) The total VOC analysis should be used for screening purposes only. All values are estimated based on the response of n-hexane. The sample extracts will be kept for a maximum of 30 days from the receipt date. Please contact client services in regards to the re-analysis of the sample(s) for the tentatively identified compounds. For the sample(s) that are non-detect no tentative identifications will be provided. L (Report ID: : Two sample wafers were found in the front part of the badge. Both wafers desorbed together. Effect on sample < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 8 of 12 Report Reference:1 Generated:19-MAY-14 15:34

144 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 08-MAY-14 Account No.: (315) Date Received: 10-MAY-14 Login No. : L FAX: (315) Date Analyzed: 13-MAY MAY-14 L (Report ID: : results is unknown. L (Report ID: : Tentative Identification includes: Trichloroethylene, Tetrachloroethylene, and Other unknown volatile organic compounds. L (Report ID: ): Tentative identification includes: Ethyl Alcohol and other volatile organic compounds. Two sample wafers were found in the front part of the badge. Both wafers desorbed together. Effect on sample results is unknown. L (Report ID: ): Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery Other Total Hydrocarbons +/-16.7% 100% < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 9 of 12 Report Reference:1 Generated:19-MAY-14 15:34

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148 Mr. Tim Krill May 20, 2014 Risk Management & Safety Services 9203 Highway 6 South Suite 124 Houston, TX DOH ELAP #11626 Account# Login# L AIHA-LAP # Dear Mr. Krill: Enclosed are the analytical results for the samples received by our laboratory on May 13, All test results meet the quality control requirements of AIHA-LAP and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted. Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. Unless otherwise requested, all samples will be discarded 14 days from the date of this report, with the exception of IOMs, which will be cleaned and disposed of after seven calendar days. Current Scopes of Accreditation can be viewed at in the accreditations section under the "about Galson" tab. Please contact Caroline Hudson at (888) , if you would like any additional information regarding this report. Thank you for using Galson Laboratories. Sincerely, Galson Laboratories [qcsig] Mary G. Unangst Laboratory Director Enclosure(s) Page 1 of 12 Report Reference:1 Generated:20-MAY-14 11:21

149 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Unit Turnaround (315) FAX: (315) Date Sampled : 09-MAY-14 Account No.: Date Received : 13-MAY-14 Login No. : L Date Analyzed : 15-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.13 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.17 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 <0.065 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: mln Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 20-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 2 of 12 Report Reference:1 Generated:20-MAY-14 11:21

150 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Unit Turnaround (315) FAX: (315) Date Sampled : 09-MAY-14 Account No.: Date Received : 13-MAY-14 Login No. : L Date Analyzed : 15-MAY MAY-14 Report ID : ,3-Butadiene Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.16 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.15 < L <2.5 <2.5 <3.3 <0.14 < L <2.5 <2.5 <3.3 <0.14 <0.064 LAB BLANK L NA <2.5 <2.5 <3.3 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2.5 ug Submitted by: mln Analytical Method : mod. NIOSH 1024; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 20-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 3 of 12 Report Reference:1 Generated:20-MAY-14 11:21

151 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Unit Turnaround (315) FAX: (315) Date Sampled : 09-MAY-14 Account No.: Date Received : 13-MAY-14 Login No. : L Date Analyzed : 15-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.09 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 <0.03 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: mln Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 20-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 4 of 12 Report Reference:1 Generated:20-MAY-14 11:21

152 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Unit Turnaround (315) FAX: (315) Date Sampled : 09-MAY-14 Account No.: Date Received : 13-MAY-14 Login No. : L Date Analyzed : 15-MAY MAY-14 Report ID : Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 < L <2 <2 <2 <0.1 <0.03 LAB BLANK L NA <2 <2 <2 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 2 ug Submitted by: mln Analytical Method : mod. NIOSH 1501; GC/FID BADGE Approved by : dnf OSHA PEL : 1 ppm (TWA) Date : 20-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 5 of 12 Report Reference:1 Generated:20-MAY-14 11:21

153 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Unit Turnaround (315) FAX: (315) Date Sampled : 09-MAY-14 Account No.: Date Received : 13-MAY-14 Login No. : L Date Analyzed : 15-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.1 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.1 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.2 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.6 < L <40 <40 <40 <2.7 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 <0.65 COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: mln Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : dnf OSHA PEL (TWA) : NA Date : 20-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 6 of 12 Report Reference:1 Generated:20-MAY-14 11:21

154 LABORATORY ANALYSIS REPORT Client : Hagemeyer Vallen-Knowledge Systems Grp Kirkville Road Site : DuPont, Orange, Texas East Syracuse, NY Project No. : Ethylene Unit Turnaround (315) FAX: (315) Date Sampled : 09-MAY-14 Account No.: Date Received : 13-MAY-14 Login No. : L Date Analyzed : 15-MAY MAY-14 Report ID : Other Total Hydrocarbons Time Front Back Total Conc ppm Sample ID Lab ID minutes ug ug ug mg/m L <40 <40 <40 <2.4 < L <40 <40 <40 <2.5 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.4 < L <40 <40 <40 <2.3 < L <40 <40 <40 <2.3 <0.64 LAB BLANK L NA <40 <40 <40 NA NA COMMENTS: Please see attached lab footnote report for any applicable footnotes. Level of quantitation: 40. ug Submitted by: mln Analytical Method : mod. NIOSH 1500; GC/FID BADGE Approved by : dnf OSHA PEL (TWA) : NA Date : 20-MAY-14 NYS DOH # : Collection Media : M3M-3520 QC by: Joe Mancuso < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 7 of 12 Report Reference:1 Generated:20-MAY-14 11:21

155 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Unit Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 09-MAY-14 Account No.: (315) Date Received: 13-MAY-14 Login No. : L FAX: (315) Date Analyzed: 15-MAY MAY-14 Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results. Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded in order to fit the report format and therefore, if carried through the calculations, may not yield an identical final result to the one reported. The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable). Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank. L (Report ID: ): Total ug corrected for a desorption efficiency of 75%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery 1,3-Butadiene +/-28.4% 94% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery +/-6.4% 94.1% L (Report ID: ): Total ug corrected for a desorption efficiency of 100%. Please note that back media results above the LOQ have been multiplied by a factor of 2.2 in all "total ug" calculations (as specified in the 3M method). SOPs: GC-SOP-12(6), GC-SOP-16(12), GC-SOP-9(9) The total VOC analysis should be used for screening purposes only. All values are estimated based on the response of n-hexane. The sample extracts will be kept for a maximum of 30 days from the receipt date. Please contact client services in regards to the re-analysis of the sample(s) for the tentatively identified compounds. For the sample(s) that are non-detect no tentative identifications will be provided. L (Report ID: : Tentative identification includes: Ethyl Alcohol and unidentified volatile compounds. < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 8 of 12 Report Reference:1 Generated:20-MAY-14 11:21

156 LABORATORY FOOTNOTE REPORT Client Name : Hagemeyer Vallen-Knowledge Systems Grp. Site : DuPont, Orange, Texas Project No. : Ethylene Unit Turnaround 6601 Kirkville Road East Syracuse, NY Date Sampled : 09-MAY-14 Account No.: (315) Date Received: 13-MAY-14 Login No. : L FAX: (315) Date Analyzed: 15-MAY MAY-14 Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated uncertainty applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. Parameter Accuracy Mean Recovery Other Total Hydrocarbons +/-16.7% 100% < -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms > -Greater Than ug -Micrograms l -Liters NS -Not Specified NA -Not Applicable ND -Not Detected ppm -Parts per Million Page 9 of 12 Report Reference:1 Generated:20-MAY-14 11:21

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161 AIHA Laboratory Accreditation Programs, LLC SCOPE OF ACCREDITATION Galson Laboratories, Inc. Laboratory ID: Kirkville Road, East Syracuse, NY Issue Date: 02/20/2014 The laboratory is approved for those specific field(s) of testing/methods listed in the table below. Clients are urged to verify the laboratory s current accreditation status for the particular field(s) of testing/methods, since these can change due to proficiency status, suspension and/or withdrawal of accreditation. Industrial Hygiene Laboratory Accreditation Program (IHLAP) Initial Accreditation Date: 01/01/1979 IHLAP Scope Category Chromatography Core Field of Testing (FoT) Gas Chromatography Technology sub-type/ Detector GC/FID Effective: 03/12/ _Scope_IHLAP (IC Method Addition)_2014_02_18 Page 1 of 8 Published Reference Method/Title of Inhouse Method GC-SOP-8, GC-SOP- 12, GC-SOP-16 GC-SOP-8, GC-SOP- 12, GC-SOP-16 GC-SOP-8, GC-SOP- 12, GC-SOP-16 GC-SOP-8, GC-SOP- 12, GC-SOP-16 GC-SOP-8, GC-SOP- 12, GC-SOP-16 GC-SOP-8, GC-SOP- 12, GC-SOP-16 GC-SOP-8, GC-SOP- 12, GC-SOP-16 NIOSH 1000 NIOSH 1001 NIOSH 1003 NIOSH 1005 NIOSH 1007 NIOSH 1010 NIOSH 1015 NIOSH 1018 NIOSH 1019 NIOSH 1022 NIOSH 1024 NIOSH 1300 NIOSH 1301 Method Description or Analyte (for internal methods only) In-House: Butyrolactone In-House: Decamethylcyclopentasiloxane In-House: 3,4- Ethylenedioxythiophene In-House: 4-Dimethylaminopyridine In-House: Vinyltrimethoxysilane In-House: Octamethylcyclotetrasiloxane In-House: Trifluoropropylmethylcyclotrisiloxane

162 IHLAP Scope Category Chromatography Core Field of Testing (FoT) Gas Chromatography Technology sub-type/ Detector GC/FID Published Reference Method/Title of Inhouse Method NIOSH 1302 NIOSH 1400 NIOSH 1401 NIOSH 1402 NIOSH 1403 NIOSH 1450 NIOSH 1451 NIOSH 1453 NIOSH 1454 NIOSH 1457 NIOSH 1458 NIOSH 1459 NIOSH 1500 NIOSH 1501 NIOSH 1550 NIOSH 1551 NIOSH 1602 NIOSH 1604 NIOSH 1606 NIOSH 1609 NIOSH 1610 NIOSH 1613 NIOSH 1615 NIOSH 1616 NIOSH 1617 NIOSH 1619 NIOSH 2000 NIOSH 2004 NIOSH 2500 NIOSH 2505 NIOSH 2508 NIOSH 2530 NIOSH 2537 NIOSH 2555 NIOSH 2557 NIOSH 5523 OSHA 01 OSHA 07 OSHA 100 OSHA 101 OSHA 104 OSHA 109 Method Description or Analyte (for internal methods only) Effective: 03/12/ _Scope_IHLAP (IC Method Addition)_2014_02_18 Page 2 of 8