DSHW-2025-000984

February 18, 2025

Ms. Paige Walton, Corrective Action Manager
Division of Waste Management & Radiation Control
Utah Department of Environmental Quality
Multi Agency State Office Building
195 North 1950 West
DEQ Second Floor
Salt Lake City, UT 84116

Subject: Results of November 2024 Annual Indoor Air Monitoring
Northrop Grumman Guidance and Electronics Company, Inc.
2211 West North Temple, Salt Lake City, Utah

Dear Ms. Walton:

Attached, please find an electronic copy of the Results of November 2024 Annual Indoor Air
Monitoring report for the Northrop Grumman Guidance and Electronics Company, Inc. site,
located at 2211 West North Temple in Salt Lake City, Utah.

If you have any questions, please do not hesitate to contact me at [phone].

Sincerely,

John Kehs
Staff Remediation Project Manager

cc: Anthony Mazzella, Northrop Grumman
Tyler Albright, Northrop Grumman
Chris Maxwell, Stantec Consulting Services Inc.
Andrew Riemer, Stantec Consulting Services Inc.

Enclosure: Results of November 2024 Annual Indoor Air Monitoring
Northrop Grumman Mission Systems
Post Office Box 1693, MS 1401
Baltimore, Maryland 21203

Results of November 2024 Annual Indoor Air Monitoring Northrop Grumman Systems Corporation
2211 West North Temple Salt Lake City, Utah
February 18, 2025

Prepared for: Northrop Grumman Systems Corporation
P.O. Box 1693 Baltimore, Maryland 21203
Prepared by:
Stantec Consulting Services Inc. 1165 Scheuring Road De Pere, Wisconsin 54115

RESULTS OF NOVEMBER 2024 ANNUAL INDOOR AIR MONITORING

This document entitled Results of November 2024 Annual Indoor Air Monitoring was prepared by
Stantec Consulting Services Inc. (“Stantec”) for the account of Northrop Grumman Systems
Corporation (the “Client”). Any reliance on this document by any third party is strictly prohibited. The
material in it reflects Stantec’s professional judgment of the scope, schedule and other limitations
stated in the document and in the contract between Stantec and the Client. The opinions in the
document are based on conditions and information existing at the time the document was published
and do not consider any subsequent changes. In preparing the document, Stantec did not verify
information supplied to it by others. Any use which a third party makes of this document is the
responsibility of such third party. Such third party agrees that Stantec shall not be responsible for
costs or damages of any kind, if any, suffered by it or any other third party as a result of decisions
made or actions taken based on this document.

Prepared by (signature) Andrew Riemer

Approved by
(signature)
Chris Maxwell, P.G.

RESULTS OF NOVEMBER 2024 ANNUAL INDOOR AIR MONITORING

Table of Contents
EXECUTIVE SUMMARY .............................................................................................................. 1
1.0 INTRODUCTION AND BACKGROUND ........................................................................... 2
1.1 SITE LOCATION ............................................................................................................... 2
1.2 HISTORICAL SITE INVESTIGATIONS ............................................................................ 2
2.0 INVESTIGATION METHODS ........................................................................................... 2
2.1 PRE-FIELD ACTIVITIES ................................................................................................... 2 2.1.1 Health and Safety Plan .................................................................................... 2
2.2 INDOOR AND OUTDOOR AIR MONITORING FIELD PARAMETERS ............................ 2
2.3 INDOOR AND OUTDOOR AIR MONITORING LOCATIONS ........................................... 3
2.4 LABORATORY ANALYSIS ............................................................................................... 3
3.0 RESULTS ......................................................................................................................... 3
3.1 NOVEMBER 2024 MONITORING EVENT ....................................................................... 3
4.0 DATA USABILITY ASSESSMENT................................................................................... 4
4.1 DATA REVIEW ................................................................................................................. 4
4.2 SAMPLE HANDLING PROCEDURES .............................................................................. 4
4.3 LABORATORY ANALYTICAL PROCEDURES ................................................................ 4
4.4 DATA RECONCILIATION ................................................................................................. 5
5.0 CONCLUSIONS ................................................................................................................ 5
LIST OF TABLES
Table 1 – Indoor Air Field Parameters Table 2 – Indoor Air and Outdoor Ambient Air VOC Laboratory Analytical Data
LIST OF FIGURES
Figure 1 – Site Location Map Figure 2 – Site Layout Figure 3 –Indoor Air Sampling Locations
LIST OF APPENDICES
Appendix A – Indoor Air Sampling Methodology Appendix B – November 2024 Indoor Air Field Data Sheets Appendix C – November 2024 Indoor Air Laboratory Analytical Data Report
RESULTS OF NOVEMBER 2024 ANNUAL INDOOR AIR MONITORING
February 18, 2025
1 | Page
EXECUTIVE SUMMARY
This report presents the results of the November 2024 annual indoor air monitoring event
conducted by Stantec Consulting Services, Inc (Stantec) at the Northrop Grumman Systems Corporation (Northrop Grumman) facility located at 2211 West North Temple in Salt Lake City, Utah (the Site). The Site location is shown on Figure 1. The Site Layout is shown on Figure 2.
On May 9, 2017, the Utah Department of Environmental Quality (UDEQ) provided a letter to Northrop Grumman Systems Corporation (Northrop Grumman) approving the Final Human Health Risk Assessment (Stantec, March 2017) for chemicals of concern (COC) in soil, soil vapor, indoor
air (IA), and groundwater at the Site. The soil vapor and indoor air COC are select volatile organic compounds (VOCs). Consistent with the approved risk assessment, the remedial approach for soil vapor and indoor air is long-term monitoring and institutional controls.
Northrop Grumman is developing a Site Management Plan (SMP). The monitoring completed for the 2024 annual event is consistent with the recommendations that will be presented in the SMP.
Analytical results from the 2024 annual indoor air monitoring event are consistent with previous
monitoring events. Through evaluation of sub-slab, IA, and outdoor (OA) conditions over multiple sampling events between 2017 and 2023, Northrop Grumman has confirmed that the data and conclusions of the HHRA remain consistent and accurate. There is no current threat to the health
of Site workers associated with VOCs.
RESULTS OF NOVEMBER 2024 ANNUAL INDOOR AIR MONITORING
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1.0 INTRODUCTION AND BACKGROUND
1.1 SITE LOCATION
The facility is located at 2211 West North Temple in Salt Lake City, Utah (the Site). The Site is bounded by North Temple to the north and south, 2200 W to the east, and 2400 W to the west. The Site location is shown on Figure 1.
1.2 HISTORICAL SITE INVESTIGATIONS
The property was vacant space prior to purchase by Litton Systems, Inc. (Litton) in the early 1950’s. Litton was purchased by Northrop Grumman in 2001. The property was subsequently renamed as the Northrop Grumman Guidance and Electronics Company, Inc. in 2007, which has
been subsequently renamed as Northrop Grumman Systems Corporation. The footprint of the original building constructed by Litton in the early 1950’s is shown on Figure 2. There have been three significant additions to the Site building since original building construction, including
expansions in 2009 and 2010.
Volatile organic compounds (VOCs) are present in soil and groundwater beneath the original footprint of the Site building, extending to depths of approximately 50 to 60 feet below ground
surface (bgs). The primary constituent of concern is trichloroethylene (TCE). The VOCs in soil and groundwater are the source of VOCs detected in sub-slab soil vapor beneath the Site building. Relatively low concentrations of select VOCs are periodically detected in IA samples below
regulatory threshold levels for commercial/industrial workers. The area of soil and groundwater affected by VOCs associated with historic Site operations does not appear to extend off-Site.
2.0 INVESTIGATION METHODS
The section presents the methods for the monitoring activities documented in this Report, including fixed-based laboratory analysis of IA samples. Laboratory data are presented in Section
3.
2.1 PRE-FIELD ACTIVITIES
2.1.1 Health and Safety Plan
Stantec prepared an amendment to the existing Site-specific health and safety plan (HASP) to address potential health and safety concerns associated with the proposed field activities. A copy
of the HASP was available during field activities for use by Stantec and was reviewed for completeness prior to commencement of the November 2024 indoor air sampling event.
2.2 INDOOR AND OUTDOOR AIR MONITORING FIELD PARAMETERS
IA and OA monitoring was conducted on November 8, 2024 following guidance outlined in the
OSWER Technical Guide for Assessing and Mitigating the Vapor Intrusion Pathway from
Subsurface Vapor Sources to Indoor Air (US EPA, June 2015). IA and OA methods and sample collection procedures are provided in Appendix A. IA and OA sampling locations are illustrated
on Figure 3.
IA and OA monitoring field parameters were reported on field forms. November 2024 field forms are included as Appendix B. Field parameters were collected on an hourly basis (where access
RESULTS OF NOVEMBER 2024 ANNUAL INDOOR AIR MONITORING
February 18, 2025
3 | Page
allowed) using an RKI GX-6000 4 gas meter with carbon dioxide (CO2) sensor; air speed, and air speed direction were recording using a TSI 9535 VelociCalc. Field parameters included:
• Temperature;
• Relative humidity;
• Carbon monoxide (CO);
• CO2;
• Air speed; and
• Air speed direction.
A MiniRAE 3000 photoionization detector (PID) with an 11.7 electrovolt (eV) lamp was also utilized to collect hourly headspace readings in the sample location areas. IA and OA field parameters are summarized on Table 1.
2.3 INDOOR AND OUTDOOR AIR MONITORING LOCATIONS
IA and OA samples were collected at four locations during the November 2024 monitoring event.
The sampling events were conducted during a typical heating season configuration for the air handler units (AHUs). Three indoor locations (IA-2, IA-3, and IA-6) were selected in the north and north-central portions of the Site building. One outdoor location (OA-1) was selected to provide information on the quality of “ambient” air being drawn into the heating, ventilation, and air conditioning system and was collected concurrent with indoor air sampling. A duplicate sample was collected from IA-2 for quality control.
2.4 LABORATORY ANALYSIS
IA and OA samples were collected using passivated, batch certified, 6-liter (L) stainless-steel Summa™ canisters fitted with individually certified low-flow controllers calibrated for sample collection up to a 10-hour period. The low-flow controllers were connected to canisters via a Swagelok™ compression fitting. Summa™ canister tags were marked with a unique identification number for shipment to the Eurofins Air Toxics, LLC (Eurofins) – Folsom, California laboratory under chain-of-custody documentation for VOC laboratory analysis under United States Environmental Protection Agency (US EPA) Method TO-15. The chain-of-custody included sample start and end times and initial and final canister vacuum readings for each sample.
3.0 RESULTS
3.1 NOVEMBER 2024 MONITORING EVENT
TCE concentrations were reported by the laboratory below estimated reporting limits (RLs) at each of the three IA locations and the OA sample location for the November 2024 monitoring
event. Other VOCs were reported above estimated RLs, but at concentrations below US EPA Industrial Air Regional Screening Levels (RSLs). Five VOC compounds (including TCE) had estimated RLs above US EPA Industrial Air RSLs. Section 4.3 provides discussion on the laboratory use of estimated RLs.
Table 2 provides a summary of VOC compounds detected by laboratory analysis. The November 2024 laboratory data analytical report is included as Appendix C.
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4.0 DATA USABILITY ASSESSMENT
Assessment of data usability is the overall process of evaluating the degree of confidence with which data may be used and relied upon.
4.1 DATA REVIEW
Following receipt of the laboratory reports, data were subjected to an internal data review process.
The following data qualifier was noted by the laboratory in the November 2024 analytical data reports:
• An ‘E’ qualifier was used to note where a result exceeded the calibration range, indicating that the result is an estimated value.
4.2 SAMPLE HANDLING PROCEDURES
Review of field notes, chain-of-custody documentation, and laboratory sample acceptance forms
indicates that samples were collected and stored at ambient temperature and received by the laboratory within the following US EPA-established hold time of 30-days for Summa™ canister analysis under US EPA Method TO-15.
4.3 LABORATORY ANALYTICAL PROCEDURES
Review of the final laboratory report indicates no laboratory modifications to US EPA Method TO-15 for the November 2024 sampling event. Canister dilutions and adjusted final pressures were appropriate for the sample volume collected. The laboratory conformed to method requirements
for continuing instrument calibration, spike, surrogate analysis, and reporting of relative percent difference. There were no detections of target compounds reported in the laboratory method blanks during the analysis which would indicate instrument carryover between sample runs.
The laboratory base RLs under standard US EPA Method TO-15 analysis were adjusted for canister pressure dilution factors, ranging between 1.48 and 1.84 for the November 2024 sampling event. These dilution factors produced estimated RLs for benzene and TCE higher than
current US EPA Industrial Air RSLs. Additionally, base RLs under standard TO-15 analysis are higher than the Industrial Air RSL for chloroform, 1,4-dichlorobenzene, and 1,4-dioxane.
An example of compounds with base and estimated RLs above than the Industrial Air RSLs
utilized by the laboratory for sample IA-2 are provided below:
Compound US EPA Industrial Air RSL (µg/m3)
Base RL for Standard TO-15 (µg/m3)
Dilution Factor
Estimated RL (µg/m3)
Benzene 1.6 1.6 1.48 2.4 Chloroform 0.53 2.4 1.48 3.6 1,4-Dichlorobenzene 1.1 3.0 1.48 4.4
1,4-Dioxane 2.5 3.6 1.48 5.3 TCE 3 2.7 1.48 4.0

RESULTS OF NOVEMBER 2024 ANNUAL INDOOR AIR MONITORING
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4.4 DATA RECONCILIATION
No data reconciliation was required for either the field or at the laboratory. The data presented in this report are considered acceptable for their intended analyzing of VOCs in indoor air.
5.0 CONCLUSIONS
As part of SMP development and continued site management, Northrop Grumman conducted IA
monitoring in November 2024. TCE was not reported in IA or OA samples. Other detected VOCs were reported at concentrations below US EPA screening levels for commercial/industrial land use. Five VOC compounds (including TCE) had estimated RLs above US EPA Industrial Air
RSLs.
The results of the 2024 indoor air sampling events are consistent with results from multiple IA and OA sampling events completed between 2017 and 2023. Northrop Grumman has confirmed that
the data and conclusions of the HHRA remain consistent and accurate. There is no current threat to the health of Site workers associated with VOCs in soil, soil vapor, IA, or groundwater beneath the Site building. Based on the collective dataset, Stantec recommends that further regularly scheduled annual indoor air monitoring is no longer necessary. The need for periodic monitoring will be evaluated where Site building conditions are changed as part of redevelopment or new construction.
Tables
TABLE 1
Indoor Air Field Parameters
Northrop Grumman Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Field Parameter Hour 1 Hour 2 Hour 3 Hour 4 Hour 5 Hour 6 Hour 7 Hour 8 Hour 9 Hour 10
(Stop)
Temperature (°F)44.5 NA 50.1 NA 49.2 NA 48.0 NA 43.9 NA
Relative Humidity (%)NA NA 61.4 NA 60.5 NA 57.1 NA 58.4 NA
Barometric Pressure (in Hg)NA NA NA NA NA NA NA NA NA NA
Air Speed (ft/min)NA NA NA NA NA NA NA NA NA NA
Air Speed Direction Northwest NA Northwest NA West NA West NA NA NA
CO (ppm)NA NA 6.9 NA 7.2 NA 7.7 NA 3.8 NA
CO2 (ppm)NA NA 324 NA 331 NA 316 NA 334 NA
PID (ppm)NA NA NA NA NA NA NA NA NA NA
Temperature (°F)NA 52.9 59.7 65.0 64.3 NA NA NA NA 64.3
Relative Humidity (%)NA 23.5 20.2 22.4 17.6 NA NA NA NA 20.1
Barometric Pressure (in Hg)NA 25.91 25.91 25.91 25.89 NA NA NA NA 25.79
Air Speed (ft/min)NA 127 193 62 241 NA NA NA NA 462
Air Speed Direction NA East East Soutwest Southwest NA NA NA NA North
CO (ppm)NA 0.0 0.0 0.0 0.0 NA NA NA NA 0.0
CO2 (ppm)NA 424 463 512 358 NA NA NA NA 360
PID (ppm)NA 0.0 0.0 0.0 0.0 NA NA NA NA 0.0
Temperature (°F)NA NA NA 40.0 NA NA 46 NA NA 40
Relative Humidity (%)NA NA NA 39 NA NA 40 NA NA 58
Barometric Pressure (in Hg)NA NA NA 30.28 NA NA 30.15 NA NA 30.22
Air Speed (ft/min)NA NA NA 116 NA NA 56 NA NA 144
Air Speed Direction NA NA NA Southwest NA NA West NA NA West
CO (ppm)NA NA NA 0.0 NA NA 0.0 NA NA 0.0
CO2 (ppm)NA NA NA 480 NA NA 440 NA NA 420
PID (ppm)NA NA NA 0.0 NA NA 0 NA NA 0.0
Temperature (°F)NA 30.0 30.0 34.0 38.0 40 40 39 39 37.0
Relative Humidity (%)NA 86.0 84.0 74.0 74.0 65.0 63.0 72.0 73.0 73.0
Barometric Pressure (in Hg)NA 30.39 30.40 30.35 30.35 30.30 30.25 30.21 30.14 30.16
Air Speed (ft/min)NA 177 89 148 222 178 46 64 396 243
Air Speed Direction NA East East West West West West Northwest North North
CO (ppm)NA 0.0 0.0 0.0 0.0 0 0 0 0 0.0
CO2 (ppm)NA 480 400 400 380 380 360 380 320 360
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)50 NA 56 58 60 64 65 66 68 69
Relative Humidity (%)44 NA 30 28 23 20 25 20 20 15
Barometric Pressure (in Hg)30.18 NA 30.19 30.19 30.17 30.16 30.14 30.14 30.08 30.07
Air Speed (ft/min)110 NA 148 448 265 509 70 210 563 489
Air Speed Direction West NA West West West West West West West West
CO (ppm)0 NA 0 0 0 0 0 0 0 0
CO2 (ppm)400 NA 380 400 380 400 380 380 380 360
PID (ppm)0 NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)35 NA 41 46 NA 50 51 ---
Relative Humidity (%)79 NA 62 43 NA 36 33 ---
Barometric Pressure (in Hg)30.27 NA 30.22 30.21 NA 30.15 30.14 ---
Air Speed (ft/min)330 NA 357 195 NA 431 179 ---
Air Speed Direction Southeast NA Southeast Southeast NA Southwest West ---
CO (ppm)0 NA 0 0 NA 0 0 ---
CO2 (ppm)420 NA 400 440 NA 440 440 ---
PID (ppm)0 NA 0.0 0.0 NA 0.0 0.0 ---
Temperature (°F)29 32 39 42 45 47 48 ---
Relative Humidity (%)74 65 55 54 47 46 46 ---
Barometric Pressure (in Hg)30.36 30.35 30.27 30.26 30.22 30.18 30.16 ---
Air Speed (ft/min)475 421 92 552 557 416 390 ---
Air Speed Direction Southeast Southeast Southeast Southwest Southwest Southwest Southwest ---
CO (ppm)0 0.0 0.0 0.0 0.0 0.0 0.0 ---
CO2 (ppm)460 460 460 420 420 400 400 ---
PID (ppm)0.0 0.0 0.0 0.0 0.0 0.0 0.0 ---
Notes:
°F - degrees Fahrenheit
% - percent
in Hg - inches of mercury
ft/min - feet per minute
CO - carbon monoxide
CO2 - carbon dioxide
ppm - parts per million
NA - not available
4/28/2023
11/17/2017
2/9/2018
11/18/2021
1/13/2022
11/10/2023
OA-1
11/8/2024
Page 1 of 10
TABLE 1
Indoor Air Field Parameters
Northrop Grumman Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Field Parameter Hour 1 Hour 2 Hour 3 Hour 4 Hour 5 Hour 6 Hour 7 Hour 8 Hour 9 Hour 10
(Stop)
Temperature (°F)NA NA 68.1 NA 69.4 NA 70.9 NA 70.1 NA
Relative Humidity (%)NA NA 28.2 NA 25.7 NA 22.4 NA 22.1 NA
Barometric Pressure (in Hg)NA NA NA NA NA NA NA NA NA NA
Air Speed (ft/min)NA NA NA NA NA NA NA NA NA NA
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA NA 5.7 NA 7.5 NA 7.1 NA 5.3 NA
CO2 (ppm)NA NA 421 NA 362 NA 355 NA 340 NA
PID (ppm)NA NA NA NA NA NA NA NA NA NA
Temperature (°F)NA 69.4 68.8 69.7 69.7 69.9 70.2 70.5 70.5 70.2
Relative Humidity (%)NA 26.5 26.7 24.4 23.2 22.6 22.4 22.8 22.4 23.2
Barometric Pressure (in Hg)NA 25.92 25.92 25.92 25.91 25.88 25.86 25.84 25.83 25.81
Air Speed (ft/min)NA 0 35 0 15 30 25 13 3 18
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 497 491 444 444 408 402 401 403 423
PID (ppm)NA 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 61.0 63.9 67.3 65.3 68.6 67.2 66.7 63.4 70.2
Relative Humidity (%)NA 61 53 39 34 40 40 40 41 58
Barometric Pressure (in Hg)NA 30.34 30.34 30.28 30.23 30.25 30.15 30.14 30.14 30.22
Air Speed (ft/min)NA 53 0 43 0 0 0 0 0 0
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 480 500 500 500 500 480 460 440 420
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 66.8 60.8 60.8 61.5 64.5 64.0 62.8 63.4 62.7
Relative Humidity (%)NA 86 84 74 74 65 63 72 73 73
Barometric Pressure (in Hg)NA 30.39 30.40 30.35 30.35 30.30 30.25 30.21 30.14 30.16
Air Speed (ft/min)NA 25 0 86 8 0 8 0 0 8
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 460 400 420 420 380 400 380 380 320
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)68.0 NA 69.6 72.5 73.3 73.4 73.5 74.2 74.3 72.7
Relative Humidity (%)44 NA 30 28 23 20 25 20 20 15
Barometric Pressure (in Hg)30.18 NA 30.19 30.19 30.17 30.16 30.14 30.14 30.08 30.07
Air Speed (ft/min)29 NA 5 15 17 3 14 14 4 20
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)0 NA 0 0 0 0 0 0 0 0
CO2 (ppm)420 NA 400 420 400 400 380 360 40 380
PID (ppm)0.0 NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)64.5 NA 66.1 67.9 NA 70.4 70.5 69.8 69.1 70.0
Relative Humidity (%)79 NA 62 43 NA 36 33 46 52 55
Barometric Pressure (in Hg)30.27 NA 30.22 30.21 NA 30.15 30.14 30.12 30.14 30.16
Air Speed (ft/min)3 NA 9 20 NA 17 0 1 9 0
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)0 NA 0 0 NA 0 0 0 0 0
CO2 (ppm)600 NA 580 560 NA 440 480 500 480 480
PID (ppm)0.1 NA 0.1 0.1 NA 0.0 0.0 0.0 0.0 0.0
Temperature (°F)69.0 69.7 70.6 71.0 71.0 71.4 71.2 71.2 71.9 72.9
Relative Humidity (%)74 65 55 54 47 46 46 48 49 53
Barometric Pressure (in Hg)30.36 30.35 30.27 30.26 30.22 30.18 30.16 30.15 30.15 30.14
Air Speed (ft/min)29 23 23 14 11 2 1 8 20 19
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)0 0 0 0 0 0 0 0 0 0
CO2 (ppm)460 460 440 440 420 420 420 420 440 440
PID (ppm)0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Notes:
°F - degrees Fahrenheit
% - percent
in Hg - inches of mercury
ft/min - feet per minute
CO - carbon monoxide
CO2 - carbon dioxide
ppm - parts per million
NA - not available
11/17/2017
2/9/2018
4/28/2023
IA-2
11/8/2024
11/18/2021
1/13/2022
11/10/2023
Page 2 of 10
TABLE 1
Indoor Air Field Parameters
Northrop Grumman Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Field Parameter Hour 1 Hour 2 Hour 3 Hour 4 Hour 5 Hour 6 Hour 7 Hour 8 Hour 9 Hour 10
(Stop)
Temperature (°F)NA NA 68.0 NA 69.2 NA 69.1 NA 69.1 NA
Relative Humidity (%)NA NA 26.7 NA 25.1 NA 25.6 NA 23.4 NA
Barometric Pressure (in Hg)NA NA NA NA NA NA NA NA NA NA
Air Speed (ft/min)NA NA NA NA NA NA NA NA NA NA
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA NA 6.0 NA 5.7 NA 5.8 NA 4.9 NA
CO2 (ppm)NA NA 362 NA 353 NA 355 NA 338 NA
PID (ppm)NA NA NA NA NA NA NA NA NA NA
Temperature (°F)NA 71.1 70.8 70.8 71.0 71.1 71.5 71.3 71.9 70.3
Relative Humidity (%)NA 25.5 24.5 23.0 22.2 21.5 21.4 21.1 22.4 22.4
Barometric Pressure (in Hg)NA 25.93 25.93 25.92 25.91 25.88 25.86 25.84 25.83 25.81
Air Speed (ft/min)NA 11 2 7 7 3 15 1 5 13
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 522 530 453 441 422 423 401 404 432
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 64.1 66.1 68.7 67.7 69.3 68.3 68.0 65.2 70.8
Relative Humidity (%)NA 61.0 53.0 39.0 34.0 40.0 40.0 40.0 41.0 58.0
Barometric Pressure (in Hg)NA 30.34 30.34 30.28 30.23 30.25 30.15 30.14 30.14 30.22
Air Speed (ft/min)NA 0 0 0 0 46 41 62 0 0
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 540 520 520 520 520 520 500 460 440
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 67.4 62.0 63.2 63.0 65.6 65.1 64.4 64.5 60.6
Relative Humidity (%)NA 86.0 84.0 74.0 74.0 65.0 63.0 72.0 73.0 73.0
Barometric Pressure (in Hg)NA 30.39 30.40 30.35 30.35 30.30 30.25 30.21 30.14 30.16
Air Speed (ft/min)NA 48 19 87 51 55 77 79 0 0
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 460 440 460 420 420 420 400 400 340
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)69.2 NA 70.5 72.1 72.6 73.0 72.1 72.6 72.4 71.3
Relative Humidity (%)44 NA 30 28 23 20 25 20 20 15
Barometric Pressure (in Hg)30.18 NA 30.19 30.19 30.17 30.16 30.14 30.14 30.08 30.07
Air Speed (ft/min)75 NA 51 89 117 74 85 115 33 33
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)0 NA 0 0 0 0 0 0 0 0
CO2 (ppm)400.0 NA 420 400 380 380 380 380 380 360
PID (ppm)0.0 NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)69.5 NA 68.2 69.4 NA 70.4 71.0 70.2 69.9 70.4
Relative Humidity (%)79 NA 62 43 NA 36 33 46 52 55
Barometric Pressure (in Hg)30.27 NA 30.22 30.21 NA 30.15 30.14 30.12 30.14 30.16
Air Speed (ft/min)13 NA 129 72 NA 134 65 73 122 101
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)0 NA 0 0 NA 0 0 0 0 0
CO2 (ppm)500 NA 460 460 NA 460 460 460 460 460
PID (ppm)0.1 NA 0.3 0.2 NA 0.1 0.0 0.0 0.0 0.0
Temperature (°F)69.2 69.9 70.7 71.6 71.4 71.3 71.7 71.4 72.0 72.1
Relative Humidity (%)74 65 55 54 47 46 46 48 49 53
Barometric Pressure (in Hg)30.36 30.35 30.27 30.26 30.2 30.2 30.2 30.2 30.2 30.1
Air Speed (ft/min)15 58 82 106 147 109 126 125 154 147
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)0 0 0 0 0 0 0 0 0 0
CO2 (ppm)540 480 460 460 440 420 420 420 420 440
PID (ppm)0.1 0.1 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0
Notes:
°F - degrees Fahrenheit
% - percent
in Hg - inches of mercury
ft/min - feet per minute
CO - carbon monoxide
CO2 - carbon dioxide
ppm - parts per million
NA - not available
11/10/2023
2/9/2018
4/28/2023
IA-3
11/8/2024
11/18/2021
1/13/2022
11/17/2017
Page 3 of 10
TABLE 1
Indoor Air Field Parameters
Northrop Grumman Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Field Parameter Hour 1 Hour 2 Hour 3 Hour 4 Hour 5 Hour 6 Hour 7 Hour 8 Hour 9 Hour 10
(Stop)
Temperature (°F)NA NA 70.1 NA 69.1 NA 69.5 NA 68.9 NA
Relative Humidity (%)NA NA 25.2 NA 25.3 NA 25.9 NA 23.4 NA
Barometric Pressure (in Hg)NA NA NA NA NA NA NA NA NA NA
Air Speed (ft/min)NA NA NA NA NA NA NA NA NA NA
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA NA 5.7 NA 5.5 NA 5.5 NA 4.8 NA
CO2 (ppm)NA NA 360 NA 396 NA 360 NA 376 NA
PID (ppm)NA NA NA NA NA NA NA NA NA NA
Temperature (°F)NA 71.8 71.6 71.3 71.4 71.6 71.8 71.5 72.7 71.4
Relative Humidity (%)NA 25.9 26.3 25.7 25.6 25.8 25.6 25.8 25.4 26.1
Barometric Pressure (in Hg)NA 25.93 25.93 25.92 25.92 25.88 25.86 25.85 25.83 25.81
Air Speed (ft/min)NA 1 3 12 15 2 1 3 1 2
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 495 493 544 459 468 438 411 445 511
PID (ppm)NA 0.0 1.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 65.2 66.7 69.3 68.3 69.7 69 68.7 66 71.1
Relative Humidity (%)NA 61.0 53.0 39.0 34.0 40.0 40.0 40.0 41.0 58.0
Barometric Pressure (in Hg)NA 30.34 30.34 30.28 30.23 30.25 30.15 30.14 30.14 30.22
Air Speed (ft/min)NA 27 8 0 0 0 8 0 0 57
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 520 500 500 500 500 500 480 460 440
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 69.3 64.8 66.6 66.2 68.3 67.9 66.8 66.9 67.5
Relative Humidity (%)NA 86.0 84.0 74.0 74.0 65.0 63.0 72.0 73.0 73.0
Barometric Pressure (in Hg)NA 30.39 30.40 30.35 30.35 30.30 30.25 30.21 30.14 30.16
Air Speed (ft/min)NA 0 0 17 0 0 0 41 0 16
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 440 420 400 380 380 360 380 360 340
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Notes:
°F - degrees Fahrenheit
% - percent
in Hg - inches of mercury
ft/min - feet per minute
CO - carbon monoxide
CO2 - carbon dioxide
ppm - parts per million
NA - not available
11/17/2017
2/9/2018
11/18/2021
1/13/2022
IA-4
Page 4 of 10
TABLE 1
Indoor Air Field Parameters
Northrop Grumman Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Field Parameter Hour 1 Hour 2 Hour 3 Hour 4 Hour 5 Hour 6 Hour 7 Hour 8 Hour 9 Hour 10
(Stop)
Temperature (°F)NA NA 67.7 NA 67.9 NA 68.1 NA 68.9 NA
Relative Humidity (%)NA NA 36.0 NA 36.0 NA 26.1 NA 23.3 NA
Barometric Pressure (in Hg)NA NA NA NA NA NA NA NA NA NA
Air Speed (ft/min)NA NA NA NA NA NA NA NA NA NA
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA NA 4.7 NA 4.7 NA 5.4 NA 4.7 NA
CO2 (ppm)NA NA 560 NA 375 NA 374 NA 361 NA
PID (ppm)NA NA NA NA NA NA NA NA NA NA
Temperature (°F)NA 71.8 71.3 71.5 71.5 71.8 72.2 72.1 72.2 71.7
Relative Humidity (%)NA 21.9 23.0 22.4 21.2 20.6 20.8 21.4 21.1 21.2
Barometric Pressure (in Hg)NA 25.96 25.92 25.92 25.91 25.87 25.86 25.84 25.83 25.81
Air Speed (ft/min)NA 6 27 31 45 25 1 1 24 3
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 468 472 481 442 429 424 427 493 426
PID (ppm)NA 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 66.7 67.6 69.9 69.3 70.3 69.6 69.5 67 71.4
Relative Humidity (%)NA 61 53.0 39 34 40 40 40 41 58
Barometric Pressure (in Hg)NA 30.34 30.34 30.28 30.23 30.25 30.15 30.14 30.14 30.22
Air Speed (ft/min)NA 66 96 76 0 63 46 46 80 58
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 480 480 500 500 480 480 460 440 440
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 69.8 66.1 67.3 67.3 69.2 69.1 67.5 67.7 68.1
Relative Humidity (%)NA 86 84.0 74 74 65 63 72 73 73
Barometric Pressure (in Hg)NA 30.39 30.40 30.35 30.35 30.30 30.25 30.21 30.14 30.16
Air Speed (ft/min)NA 65 59 58 55 88 75 79 24 0
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 460 400 400 400 380 360 380 380 320
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
°F - degrees Fahrenheit
% - percent
in Hg - inches of mercury
ft/min - feet per minute
CO - carbon monoxide
CO2 - carbon dioxide
ppm - parts per million
NA - not available
IA-5
11/17/2017
2/9/2018
11/18/2021
11/18/2021
Page 5 of 10
TABLE 1
Indoor Air Field Parameters
Northrop Grumman Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Field Parameter Hour 1 Hour 2 Hour 3 Hour 4 Hour 5 Hour 6 Hour 7 Hour 8 Hour 9 Hour 10
(Stop)
Temperature (°F)NA NA 65.5 NA 66.6 NA 67.6 NA 68.0 NA
Relative Humidity (%)NA NA 37.1 NA 28.2 NA 27.4 NA 25.4 NA
Barometric Pressure (in Hg)NA NA NA NA NA NA NA NA NA NA
Air Speed (ft/min)NA NA NA NA NA NA NA NA NA NA
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA NA 4.4 NA 5.0 NA 6.1 NA 4.8 NA
CO2 (ppm)NA NA 498 NA 370 NA 404 NA 343 NA
PID (ppm)NA NA NA NA NA NA NA NA NA NA
Temperature (°F)NA 71.8 71.2 71.8 71.4 71.3 71.9 72.6 72.5 72.3
Relative Humidity (%)NA 21.4 21.6 21.6 20.4 19.4 19.9 19.6 20.0 24.2
Barometric Pressure (in Hg)NA 25.93 25.92 25.92 25.91 25.87 25.86 25.84 25.83 25.81
Air Speed (ft/min)NA 4 15 11 12 3 4 3 9 0
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 495 455 460 417 414 409 439 416 438
PID (ppm)NA 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 68.3 68.7 70.5 70.1 70.6 70.1 70.2 68.1 71.3
Relative Humidity (%)NA 61.0 53.0 39.0 34.0 40.0 40.0 40.0 41.0 58.0
Barometric Pressure (in Hg)NA 30.34 30.34 30.28 30.23 30.25 30.15 30.14 30.14 30.22
Air Speed (ft/min)NA 66 52 104 94 42 51 72 48 77
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 520 500 520 500 480 500 500 460 460
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 70.4 66.9 68.0 68.3 69.8 69.7 68.3 68.7 68.9
Relative Humidity (%)NA 86.0 84.0 74.0 74.0 65.0 63.0 72.0 73.0 73.0
Barometric Pressure (in Hg)NA 30.39 30.40 30.35 30.35 30.30 30.25 30.21 30.14 30.16
Air Speed (ft/min)NA 218 157 53 142 158 218 176 230 195
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 500 420 440 440 420 420 420 400 340
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)68.5 NA 71.7 72.8 72.5 72.9 72.5 74.9 73.5 73.0
Relative Humidity (%)44 NA 30 28 23 20 25 20 20 15
Barometric Pressure (in Hg)30.18 NA 30.19 30.19 30.17 30.16 30.14 30.14 30.08 30.07
Air Speed (ft/min)143.0 NA 95 86 118 117 172 107 138 135
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)0 NA 0 0 0 0 0 0 0 0
CO2 (ppm)440 NA 460 400 400 400 400 380 400 380
PID (ppm)0.0 NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)69.4 NA 70.2 69.4 NA 71.5 71.9 71.9 71.9 71.7
Relative Humidity (%)79 NA 62 43 NA 36 33 46 52 55
Barometric Pressure (in Hg)30.27 NA 30.22 30.21 NA 30.15 30.14 30.12 30.14 30.16
Air Speed (ft/min)118.0 NA 122 148 NA 68 54 43 48 55
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)0 NA 0 0 NA 0 0 0 0 0
CO2 (ppm)500 NA 480 460 NA 500 480 500 480 480
PID (ppm)0.1 NA 0.1 0.1 NA 0.0 0.1 0.2 0.0 0.0
Temperature (°F)69.2 71.3 71.0 71.2 70.9 70.9 ----
Relative Humidity (%)74 65 55 54 47 46 ----
Barometric Pressure (in Hg)30.36 30.35 30.27 30.26 30.22 30.18 ----
Air Speed (ft/min)76 83 182 123 115 109 ----
Air Speed Direction NA NA NA NA NA NA ----
CO (ppm)0 0 0 0 0.0 0.0 ----
CO2 (ppm)540 480 540 480 480 460 ----
PID (ppm)0.1 0.3 0.1 0.2 0.2 0.1 ----
°F - degrees Fahrenheit
% - percent
in Hg - inches of mercury
ft/min - feet per minute
CO - carbon monoxide
CO2 - carbon dioxide
ppm - parts per million
NA - not available
11/18/2021
1/13/2022
11/17/2017
IA-6
11/8/2024
11/10/2023
4/28/2023
2/9/2018
Page 6 of 10
TABLE 1
Indoor Air Field Parameters
Northrop Grumman Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Field Parameter Hour 1 Hour 2 Hour 3 Hour 4 Hour 5 Hour 6 Hour 7 Hour 8 Hour 9 Hour 10
(Stop)
Temperature (°F)NA NA 69.3 NA 63.4 NA 66.1 NA 66.3 NA
Relative Humidity (%)NA NA 26.4 NA 32.1 NA 31.1 NA 26.7 NA
Barometric Pressure (in Hg)NA NA NA NA NA NA NA NA NA NA
Air Speed (ft/min)NA NA NA NA NA NA NA NA NA NA
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA NA 6.3 NA 6.0 NA 6.5 NA 5.0 NA
CO2 (ppm)NA NA 368 NA 351 NA 364 NA 334 NA
PID (ppm)NA NA NA NA NA NA NA NA NA NA
Temperature (°F)NA 71.1 70.9 70.9 71.0 71.4 71.4 71.3 71.8 71.7
Relative Humidity (%)NA 27.1 27.8 26.0 25.3 25.6 24.9 25.2 25.6 25.4
Barometric Pressure (in Hg)NA 25.92 25.92 25.92 25.91 25.87 25.86 25.84 25.83 25.81
Air Speed (ft/min)NA 50 3 75 32 81 71 61 61 30
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 468 474 431 406 389 421 426 409 386
PID (ppm)NA 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 67.0 62.6 66.7 64.3 68.2 66.9 66.1 62.2 69.9
Relative Humidity (%)NA 61 53 39 34 40 40 40 41 58
Barometric Pressure (in Hg)NA 30.34 30.34 30.28 30.23 30.25 30.15 30.14 30.14 30.22
Air Speed (ft/min)NA 9 132 89 48 104 45 74 124 64
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 500 500 480 480 480 480 480 460 400
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 66.3 66.7 60.1 60.8 63.5 62.8 61.7 62.3 60.6
Relative Humidity (%)NA 86.0 84.0 74.0 74.0 65.0 63.0 72.0 73.0 73.0
Barometric Pressure (in Hg)NA 30.39 30.40 30.35 30.35 30.30 30.25 30.21 30.14 30.16
Air Speed (ft/min)NA 10 41 45 33 124 113 77 110 116
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 420 400 400 400 380 360 380 380 340
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Notes:
°F - degrees Fahrenheit
% - percent
in Hg - inches of mercury
ft/min - feet per minute
CO - carbon monoxide
CO2 - carbon dioxide
ppm - parts per million
NA - not available
11/18/2021
1/13/2022
IA-7
11/17/2017
2/9/2018
Page 7 of 10
TABLE 1
Indoor Air Field Parameters
Northrop Grumman Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Field Parameter Hour 1 Hour 2 Hour 3 Hour 4 Hour 5 Hour 6 Hour 7 Hour 8 Hour 9 Hour 10
(Stop)
Temperature (°F)NA NA 45.9 NA 44.3 NA 40.8 NA 40.2 NA
Relative Humidity (%)NA NA 59.7 NA 69.1 NA 73.9 NA 64.8 NA
Barometric Pressure (in Hg)29.5 29.76 NA NA 29.8 NA 29.9 NA NA NA
Air Speed (ft/min)NA NA NA NA NA NA NA NA NA NA
Air Speed Direction Northwest East Northwest NA West NA Northwest NA Northwest NA
CO (ppm)NA NA 5.6 NA 4.5 NA 4.2 NA 4.5 NA
CO2 (ppm)NA NA 329 NA 332 NA 333 NA 358 NA
PID (ppm)NA NA NA NA NA NA NA NA NA NA
Temperature (°F)NA 52.8 57.8 72.9 63.6 66.8 67.8 65.3 65.4 60.2
Relative Humidity (%)NA 30.0 21.4 22.6 19.0 17.5 17.5 19.5 21.2 22.9
Barometric Pressure (in Hg)NA 25.93 25.93 25.93 25.91 25.88 25.86 25.85 25.83 25.81
Air Speed (ft/min)NA 312 142 26 746 342 69 152 228 428
Air Speed Direction NA East East Southwest West West Southwest East Northeast East
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 424 426 400 362 368 379 362 364 359
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 34.0 37.0 40.0 43.0 44.0 46.0 45.0 44.0 NA
Relative Humidity (%)NA 61.0 53.0 39.0 34.0 40.0 40.0 40.0 41.0 NA
Barometric Pressure (in Hg)NA 30.34 30.34 30.28 30.23 30.25 30.15 30.14 30.14 NA
Air Speed (ft/min)NA 186 183 209 110 232 556 166 478 NA
Air Speed Direction NA Southwest Southwest Southwest Southwest Southwest West West West NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NA
CO2 (ppm)NA 440 400 400 400 400 400 400 380 NA
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NA
Temperature (°F)NA 30 30 34 38 40 40 39 39 37
Relative Humidity (%)NA 86.0 84.0 74.0 74.0 65.0 63.0 72.0 73.0 73.0
Barometric Pressure (in Hg)NA 30.39 30.40 30.35 30.35 30.30 30.25 30.21 30.14 30.16
Air Speed (ft/min)NA 297 280 294 178 225 209 330 494 105
Air Speed Direction NA East West West West Northwest Northwest Northwest Northwest Northwest
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 440 400 400 360 420 340 380 320 340
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Notes:
°F - degrees Fahrenheit
% - percent
in Hg - inches of mercury
ft/min - feet per minute
CO - carbon monoxide
CO2 - carbon dioxide
ppm - parts per million
NA - not available
11/17/2017
2/9/2018
11/18/2021
1/13/2022
OA-8
Page 8 of 10
TABLE 1
Indoor Air Field Parameters
Northrop Grumman Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Field Parameter Hour 1 Hour 2 Hour 3 Hour 4 Hour 5 Hour 6 Hour 7 Hour 8 Hour 9 Hour 10
(Stop)
Temperature (°F)NA NA 68.2 NA 69.9 NA 70.8 NA 69.7 NA
Relative Humidity (%)NA NA 27.8 NA 25.1 NA 23.5 NA 22.1 NA
Barometric Pressure (in Hg)NA NA NA NA NA NA NA NA NA NA
Air Speed (ft/min)NA NA NA NA NA NA NA NA NA NA
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA NA 6.2 NA 7.8 NA 7.4 NA 5.5 NA
CO2 (ppm)NA NA 395 NA 349 NA 351 NA 344 NA
PID (ppm)NA NA NA NA NA NA NA NA NA NA
Temperature (°F)NA 69.8 69.5 70.3 70.3 70.3 70.6 70.8 70.8 70.9
Relative Humidity (%)NA 24.8 25.7 24.1 23.4 22.4 22.1 22.7 22.3 22.7
Barometric Pressure (in Hg)NA 25.92 25.93 25.92 25.91 25.88 25.86 25.84 25.83 25.81
Air Speed (ft/min)NA 3 24 3 26 0 25 2 17 16
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 502 513 453 430 436 427 431 427 389
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 67 61.4 65.9 65.3 67.8 66.6 65.5 61.5 69.6
Relative Humidity (%)NA 61 53 39 34 40 40 40 41 58
Barometric Pressure (in Hg)NA 30.34 30.34 30.28 30.23 30.25 30.15 30.14 30.14 30.22
Air Speed (ft/min)NA 0 0 0 0 0 76 0 42 64
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 480.0 460 460 460 460 460 460 420 400
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 65.0 66.1 57.6 59.8 61.4 61.1 59.7 60.8 57.9
Relative Humidity (%)NA 86.0 84.0 74.0 74.0 65.0 63.0 72.0 73.0 73.0
Barometric Pressure (in Hg)NA 30.39 30.40 30.35 30.35 30.30 30.25 30.21 30.14 30.16
Air Speed (ft/min)NA 8 18 70 55 35 0 0 0 NA
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 400 400 400 420 420 400 380 400 360
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Notes:
°F - degrees Fahrenheit
% - percent
in Hg - inches of mercury
ft/min - feet per minute
CO - carbon monoxide
CO2 - carbon dioxide
ppm - parts per million
NA - not available
IA-9
11/17/2017
2/9/2018
11/17/2017
2/9/2018
Page 9 of 10
TABLE 1
Indoor Air Field Parameters
Northrop Grumman Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Field Parameter Hour 1 Hour 2 Hour 3 Hour 4 Hour 5 Hour 6 Hour 7 Hour 8 Hour 9 Hour 10
(Stop)
Temperature (°F)NA NA 67.3 NA 68.1 NA 67.2 NA 67.3 NA
Relative Humidity (%)NA NA 28.3 NA 26.6 NA 26.4 NA 24.2 NA
Barometric Pressure (in Hg)NA NA NA NA NA NA NA NA NA NA
Air Speed (ft/min)NA NA NA NA NA NA NA NA NA NA
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA NA 6.9 NA 15.9 NA 12.6 NA 9.1 NA
CO2 (ppm)NA NA 347 NA 385 NA 368 NA 347 NA
PID (ppm)NA NA NA NA NA NA NA NA NA NA
Temperature (°F)NA 69.8 69.3 70.1 70.1 70.3 70.7 70.9 71.2 70.7
Relative Humidity (%)NA 24.6 24.2 21.6 20.2 18.7 18.9 19.0 19.4 19.4
Barometric Pressure (in Hg)NA 25.92 25.92 25.92 25.91 25.88 25.86 25.84 25.83 25.81
Air Speed (ft/min)NA 0 0 14 18 2 3 24 24 30
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 523 533 485 454 409 465 450 404 446
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 62.8 64.9 68.2 66.4 69.0 67.8 67.4 64.4 70.7
Relative Humidity (%)NA 61 53 39 34 40 40 40 41 58
Barometric Pressure (in Hg)NA 30.34 30.34 30.28 30.23 30.25 30.15 30.14 30.14 30.22
Air Speed (ft/min)NA 0 0 0 0 0 0 0 0 0
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 480 500 520 500 480 500 460 440 4440
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Temperature (°F)NA 68.6 63.7 65.0 64.4 66.8 66.6 65.6 65.7 66.0
Relative Humidity (%)NA 86.0 84.0 74.0 74.0 65.0 63.0 72.0 73.0 73.0
Barometric Pressure (in Hg)NA 30.39 30.40 30.35 30.04 30.30 30.25 30.21 30.14 30.16
Air Speed (ft/min)NA 0 69 72 47 54 58 52 0 25
Air Speed Direction NA NA NA NA NA NA NA NA NA NA
CO (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
CO2 (ppm)NA 460 380 380 360 340 320 380 340 300
PID (ppm)NA 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Notes:
°F - degrees Fahrenheit
% - percent
in Hg - inches of mercury
ft/min - feet per minute
CO - carbon monoxide
CO2 - carbon dioxide
ppm - parts per million
NA - not available
1/18/2021
1/13/2022
IA-10
11/17/2017
2/9/2018
Page 10 of 10
TABLE 2
Indoor and Outdoor Ambient Air VOC Laboratory Analytical Data
Northrop Grumman Systems Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Location Sample
Start
Sample
Stop
Laboratory
Dilution
Factor
Acetone Benzene Chloro-
ethane Chloroform Cyclo-
hexane
1,4-
Dichloro
benzene
1,1-DCA 1,1-DCE
cis-
1,2-
DCE
trans-
1,2-DCE
1,4-
Dioxane Ethanol Ethyl-
benzene
4-Ethyl
toluene Freon 11 Freon 12 Freon 113 n-
Heptane Hexane Methylene
Chloride MEK
4-
Methyl-
2-
pentano
ne
N-Propyl
benzene
2-
Propanol PCE Tetra
hydrofuran Toluene 1,1,1-
TCA TCE 1,2,4-
TMB
1,3,5-
TMB
m,p-
Xylene
o-
Xylene
8/1/2013 8:11 19:25 1.8 220 E <0.29 <2.4 <0.88 <0.62 <1.1 <0.14 <0.071 <0.14 <0.71 <0.65 1.9 <0.16 <0.88 1.3 2.4 <1.4 <0.74 <0.63 <1.2 <2.6 <0.74 <0.88 120 <0.24 <2.6 ---<0.20 <0.19 <0.88 <0.88 ---<0.16
2/1/2014 8:36 19:11 1.72 17 0.59 <2.3 <0.84 <0.59 <1.0 <0.14 <0.068 <0.14 <0.68 <0.62 12 0.41 <0.84 1.2 2.8 <1.3 <0.70 1.0 <1.2 2.9 <0.70 <0.84 19 <0.23 2.9 ---<0.19 <0.18 <0.84 <0.84 ---0.32
11/17/2017 6:27 15:45 1 29 0.56 J <2.1 <1.5 <1.4 1.0 J <1.2 <3.2 <1.6 0.81 J <2.9 3.6 <1.7 0.94 J 1.6 J 1.4 J <3.1 <3.3 1.1 J 0.66 J 4.4 0.78 J 0.56 J 27 <2.7 3.9 1.5 <1.6 <2.1 1.4 J 0.85 J 1.1 J 0.49 J
2/9/2018 7:23 16:51 1 11 J 0.41 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 <1.6 <2.9 3.1 <1.7 <2.0 1.2 J 2.2 <3.1 <3.3 0.98 J 0.55 J <2.4 <1.6 <2.0 40 <2.7 <2.4 1.5 <1.6 <2.1 <3.9 <2.0 0.73 J 0.23 J
11/18/2021 8:30 17:47 5.29 78 <8.4 <28 <13 <9.1 NA <11 <10 <10 <10 <38 <50 <11 <13 <15 <13 <20 <11 <9.3 <92 <31 <11 NA 180 <18 <7.8 2.0 J <14 3900 <13 <13 <11 <11
1/13/2022 7:22 16:37 1.55 180 2.6 <8.2 <3.8 <2.7 NA <3.1 <3.1 <3.1 16 <11 92 1.2 J <3.8 1.5 J 2.8 J 3.2 J <3.2 2.4 J <27 <9.1 <3.2 NA 500 <5.2 2.1 J 6.9 <4.2 <4.2 <3.8 <3.8 3.9 <3.4
4/28/2023 7:24 17:17 1.78 47 <0.63 <3.0 <0.67 <0.59 NA <0.75 <0.89 <0.79 5.7 <0.71 7.4 J <0.86 <1.1 <0.98 2.3 J <1.6 <1.0 <0.89 <2.2 1.4 J <2.2 NA 110 <1.1 <0.80 1.6 J <0.91 <1.0 <1.5 <1.5 <1.4 <0.72
11/10/2023 7:25 14:45 2.08 44 <0.78 <3.8 <1.2 <1.3 NA <0.92 <2.1 <0.90 4.5 <3.4 13 J <1.1 <1.1 <1.9 <2.4 <1.7 <1.4 <1.1 <3.0 <2.1 <1.6 NA 140 <1.8 <2.0 1.8 J <1.4 <1.7 <1.4 <1.4 0.97 J <1.1
11/8/2024 7:35 14:43 1.68 42 <2.7 <8.9 <4.1 <2.9 <5.0 <3.4 <3.3 <3.3 4.5 <12 <16 <3.6 <4.1 <4.7 <4.2 <6.4 <3.4 <3.0 <29 <9.9 <3.4 <4.1 89 <5.7 <2.5 <6.3 <4.6 <4.5 <4.1 <4.1 <7.3 <3.6
8/1/2013 8:25 19:34 1.81 73 0.50 <2.4 <0.88 <0.62 <1.1 <0.15 <0.072 <0.14 <0.72 <0.65 5.1 0.22 <0.89 1.8 2.4 <1.4 <0.74 0.65 <1.2 <2.7 <0.74 <0.89 160 <0.24 <2.7 ---<0.20 <0.19 <0.89 <0.89 ---0.24
2/1/2014 8:52 18:02 1.7 28 0.63 <2.2 <0.83 <0.58 <1.0 <0.14 <0.067 <0.13 <0.67 <0.61 6.4 0.54 <0.84 1.4 2.6 1.4 <0.70 4.9 <1.2 <2.5 <0.70 <0.84 55 <0.23 <2.5 ---<0.18 <0.18 <0.84 <0.84 ---0.67
11/17/2017 6:18 15:31 4.94 260 4.1 J <10 <7.2 <6.8 <12 <6.0 <16 <7.8 <7.8 <14 16 <8.6 <9.7 <11 <9.8 <15 <16 44 <6.9 <12 <8.1 <9.7 39 <13 <12 <7.4 <8.1 8.9 J <19 <9.7 2.9 J <8.6
12/15/2017*6:18 15:31 1 NA 1.7 <2.1 <1.5 <1.4 0.99 J <1.2 <3.2 <1.6 <1.6 1.2 J ---2.3 0.98 J 1.5 J 1.7 J <3.1 0.56 J NA 0.90 J 3.7 <1.6 0.59 J ---<2.7 <2.4 3.4 <1.6 <2.1 2.6 J 1.1 J 6.8 2.3
2/9/2018 6:36 16:36 1 7.9 J <1.3 <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 <1.6 <2.9 <1.9 <1.7 <2.0 <2.2 <2.0 <3.1 <3.3 <2.8 <1.4 <2.4 <1.6 <2.0 9.9 <2.7 <2.4 <1.5 <1.6 <2.1 <3.9 <2.0 <3.5 <1.7
11/18/2021 7:17 17:07 1.88 300 1.3 J <9.9 <4.6 <3.2 NA <3.8 <3.7 <3.7 72 <14 66 <4.1 <4.6 1.8 J 3.1 J <7.2 <3.8 8.6 <33 <11 <3.8 NA 880 <6.4 <2.8 3.9 <5.1 <5.0 <4.6 <4.6 2.5 J <4.1
1/13/2022 6:35 16:15 1.58 560 2.8 <8.3 <3.8 0.79 J NA <3.2 <3.1 <3.1 310 <11 110 1.3 J <3.9 1.5 J 2.2 J 5.8 J 1.5 J 3.6 4.2 J 3.4 J <3.2 NA 1400 E <5.4 <2.3 10 <4.3 <4.2 <3.9 <3.9 5.0 1.4 J
4/28/2023 6:58 16:58 1.75 140 <0.62 <3.2 <0.66 <0.58 NA <0.74 <0.88 <0.78 110 <0.70 14 J <0.85 <1.0 <0.96 2.3 J <1.5 <1.0 <0.88 <2.2 1.8 J <2.2 NA 430 <1.1 <0.79 1.2 J <0.90 <1.0 <1.5 <1.5 <1.3 <0.70
4/28/2023 (Dup-01)6:58 16:58 1.78 150 <0.63 <3.0 <0.67 <0.59 NA <0.75 <0.89 <0.79 120 <0.71 16 J <0.86 <1.1 0.99 J 2.1 J <1.6 <1.0 <0.89 <2.2 1.9 J <2.2 NA 480 <1.1 <0.80 1.2 J <0.91 <1.0 <1.5 <1.5 <1.4 <0.72
11/10/2023 7:05 17:05 1.61 230 0.73 J <2.9 <0.90 <1.0 NA <0.71 <1.6 <0.69 130 <2.7 20 <0.83 <0.88 <1.4 2.1 J <1.3 <1.1 4.9 <2.3 3.3 J <1.3 NA 460 <1.4 <1.4 2.3 J <1.1 <1.3 <1.1 <1.0 1.4 J <0.84
11/10/2023 (Dup-01)7:05 17:05 1.60 220 0.72 J <2.9 <0.89 <1.0 NA <0.71 <1.6 <3.2 140 <2.6 20 <0.83 <0.87 <1.4 <1.9 <1.3 <1.1 5.2 <2.3 <1.6 <1.3 NA 440 <1.4 <1.5 2.4 J <1.1 <1.3 <1.1 <1.0 1.3 J <0.83
11/8/2024 7:06 16:35 1.48 270 <2.4 <7.8 <3.6 <2.5 <4.4 <3.0 <2.9 <2.9 140 <11 28 <3.2 <3.6 <4.2 <3.6 <5.7 <3.0 15 <26 <8.7 <3.0 <3.6 800 <5.0 <2.2 <5.6 <4.0 <4.0 <3.6 <3.6 <6.4 <3.2
11/08/2024 (Dup-01)7:08 15:55 1.50 270 <2.4 <7.9 <3.7 <2.6 <4.5 <3.0 <3.0 <3.0 150 <11 39 <3.2 <3.7 <4.2 <3.7 <5.7 <3.1 15 <26 <8.8 <3.1 <3.7 900 E <5.1 <2.2 <5.6 <4.1 <4.0 <3.7 <3.7 <6.5 <3.2
8/1/2013 8:36 19:38 1.79 44 0.29 <2.4 <0.87 <0.62 <1.1 <0.14 <0.071 <0.14 <0.71 <0.64 3.6 <0.16 <0.88 1.6 2.5 1.7 <0.73 1.5 <1.2 <2.6 <2.6 <0.88 110 <0.24 <2.6 ---<0.20 <0.19 <0.88 <0.88 ---0.22
2/1/2014 8:58 18:58 1.68 30 0.67 <2.2 <0.82 1.0 <1.0 <0.14 <0.067 <0.13 <0.67 <0.60 7.9 0.96 <0.82 1.2 2.7 <1.3 1.5 2.4 2.0 2.7 <0.69 <0.82 82 0.67 <2.5 ---<0.18 0.22 <0.82 <0.82 ---0.87
11/17/2017 6:12 16:35 14 580 <18 <30 <21 <19 <34 <17 <44 <22 <22 <40 <26 <24 <28 <31 <28 <43 <46 <39 4.5 J <33 <23 <28 610 <38 <33 <21 <23 <30 <55 <28 <49 <24
12/15/2017*6:12 16:35 1 NA 0.81 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 1.4 J <2.9 ---0.96 J <2.0 1.7 J 1.7 J 1.2 J 0.37 J ---4.6 2.0 J <1.6 <2.0 ---<2.7 <2.4 2.3 <1.6 <2.1 <3.9 <2.0 3.5 1.1 J
2/9/2018 6:55 17:01 1 240 E 0.56 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 <1.6 <2.9 8.5 0.27 J <2.0 1.2 J 2.1 <3.1 0.36 J 18 1.3 J 0.71 J <1.6 <2.0 410 E <2.7 <2.4 2.0 <1.6 <2.1 <3.9 <2.0 1.1 J 0.31 J
11/18/2021 7:29 17:14 2.05 510 <3.3 <11 <5.0 <3.5 NA <4.1 <4.1 <4.1 38 <15 160 <4.4 <5.0 2.6 J 3.2 J 3.4 J <4.2 5.8 <36 <12 <4.2 NA 1500 E <5.5 <3.0 5.1 <5.6 <5.5 <5.0 <5.0 3.6 J <4.4
1/13/2022 6:40 16:18 1.58 500 2.6 <8.3 <3.8 0.81 J NA <3.2 <3.1 <3.1 100 <11 200 1.4 J <3.9 1.9 J 2.2 J 1.7 J 1.4 J 2.7 J <27 <9.3 <3.2 NA 1400 E 2.0 J <2.3 10 <4.3 3.4 J <3.9 <3.9 4.7 1.5 J
4/28/2023 7:05 17:05 1.87 340 <0.66 <3.2 <0.71 <0.62 NA <0.79 <0.94 <0.83 <0.84 <0.75 20 <0.91 <1.1 1.1 J 2.3 J <1.6 <1.1 <0.94 <2.3 1.6 J <2.3 NA 930 <1.2 <0.84 1.2 J <0.96 <1.1 <1.6 <1.6 2.7 J 0.77 J
11/10/2023 7:10 17:14 1.50 670 0.90 J <2.7 <0.84 <0.95 NA <0.66 <1.5 <3.0 <1.4 <2.5 26 <0.77 <0.82 1.4 J 1.9 J <1.2 <1.0 <0.83 <2.2 <1.5 <1.2 NA 1000 E <1.3 <1.4 3.5 J <1.0 <1.2 <1.0 <0.99 2.1 J <0.78
11/8/2024 7:16 16:40 1.69 540 <2.7 <8.9 <4.1 <2.9 <5.1 <3.4 <3.4 <3.4 <3.4 <12 29 <3.7 <4.2 <4.7 <4.2 <6.5 <3.5 <3.0 <29 <10 <3.5 <4.2 1600 E <5.7 <2.5 <6.4 <4.6 <4.5 <4.2 <4.2 <7.3 <3.7
8/1/2013 8:43 19:46 1.78 94 0.3 <2.3 <0.87 <0.61 <1.1 <0.14 <0.070 <0.14 5 <0.64 6.3 0.26 <0.88 1.6 2.6 1.5 <0.73 6.1 2.8 <2.6 <0.73 <0.88 190 E <0.24 <2.6 ---<0.19 <0.19 <0.88 <0.88 ---0.34
2/1/2014 9:05 20:05 1.67 240E 0.69 <2.2 <0.82 <0.57 <1.0 <0.14 <0.066 <0.13 11 <0.60 8.3 0.70 <0.82 1.3 2.5 <1.3 <0.68 45 11 <2.5 <0.68 <0.82 450E <0.23 <2.5 ---<0.18 <0.18 <0.82 <0.82 ---0.85
2/1/2014 (BDS-1)9:05 20:05 1.67 200 E 0.66 <2.2 <0.82 <0.57 <1.0 <0.14 <0.066 <0.13 11 <0.60 9.5 0.76 <0.82 1.2 2.7 <1.3 <0.68 38 11 <2.5 <0.68 <0.82 430 E <0.24 <2.5 <0.18 <0.18 <0.82 <0.82 1.0
11/17/2017 6:10 15:53 25.1 560 <32 <53 <37 <35 <60 <30 <80 <40 <40 <72 <47 <44 <49 <56 <50 <77 <82 <71 19 J <59 <41 <49 3300 <68 <59 <38 <41 <54 <99 <49 <87 <44
12/15/2017*6:10 15:53 1 NA 0.55 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 24 <2.9 ---0.37 J <2.0 1.6 J 2.0 2.6 J <3.3 ---21 7.2 <1.6 <2.0 ---<2.7 <2.4 1.3 J <1.6 <2.1 <3.9 <2.0 1.4 J 0.45 J
2/9/2018 7:00 17:05 1 560 E 0.47 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 22 <2.9 7.2 <1.7 <2.0 1.3 J 2.3 4.3 0.37 J 520 E 14 1.5 J <1.6 <2.0 1600 E <2.7 <2.4 1.7 <1.6 <2.1 <3.9 <2.0 0.91 J 0.29 J
11/18/2021 7:38 17:16 6.29 680 <10 <33 <15 <11 NA <13 <12 <12 3,600 <45 85 <14 <15 <18 <16 <24 <13 500 26 J <37 <13 NA 4000 E <21 <9.3 3.5 J <17 <17 <15 <15 <14 <14
1/13/2022 6:55 16:25 4.64 390 <7.4 <24 <11 <8.0 NA <9.4 <9.2 <9.2 3,000 <33 140 <10 <11 <13 <11 <18 <9.5 7.4 J 24 J 21 J <9.5 NA 3100 E <16 <6.8 7.8 J <13 <12 <11 <11 <10 <10
NE 1.6 NE 0.53 26,000 1.1 7.7 17 180 180 2.5 NE 4.9 NE NE 440 22,000 1,800 3,100 1,200 22,000 13,000 4,400 NE 47 NE 22,000 22,000 3 260 260 440 440
Notes:
All results expressed as micrograms per cubic meter (µg/m3)
* - indicates samples collected on 11/17/2017 were rerun by laboratory
< - indicates concentration was reported below the laboratory limit of detection
E - Value exceeds instrument calibration range
J - Result is less than the reporting limit but greater than or equal to to the method detection limit. The concentration is an approximate value
DCA - dichloroethane
DCE - dichloroethene
Freon 11 - trichlorofluoromethane
Freon 12 - dichlorodifluoromethane
Freon 113 - 1,1,2-trichloro-1,2,2-trifluoroethane
MEK - methyl ethyl ketone (2-butanone)
PCE - tetrachloroethene
TCA - trichloroethane
TCE - trichloroethene
TMB - trimethylbenzene
NA - not analyzed
US EPA - United States Environmental Protection Agency
RSL - Regional Screening Level
NE - not established
BOLD indicates concentration exceeds the RSL
USEPA Industrial Air RSL (November 2024)
IA-4 Indoor
OA-1 Outdoor
IA-2 Indoor
IA-3 Indoor
Page 1 of 2
TABLE 2
Indoor and Outdoor Ambient Air VOC Laboratory Analytical Data
Northrop Grumman Systems Corporation
2211 West North Temple
Salt Lake City, Utah
Sample ID Date Location Sample
Start
Sample
Stop
Laboratory
Dilution
Factor
Acetone Benzene Chloro-
ethane Chloroform Cyclo-
hexane
1,4-
Dichloro
benzene
1,1-DCA 1,1-DCE
cis-
1,2-
DCE
trans-
1,2-DCE
1,4-
Dioxane Ethanol Ethyl-
benzene
4-Ethyl
toluene Freon 11 Freon 12 Freon 113 n-
Heptane Hexane Methylene
Chloride MEK
4-
Methyl-
2-
pentano
ne
N-Propyl
benzene
2-
Propanol PCE Tetra
hydrofuran Toluene 1,1,1-
TCA TCE 1,2,4-
TMB
1,3,5-
TMB
m,p-
Xylene
o-
Xylene
8/1/2013 8:49 19:57 1.78 320 E 0.48 <2.3 <0.87 <0.61 <1.1 <0.14 <0.070 <0.14 2.3 <0.64 5.6 J 0.75 <0.88 1.9 4.4 3.8 <0.73 1.6 13 <2.6 <0.73 <0.88 450 E <0.24 <2.6 ---<0.19 <0.19 <0.88 <0.88 ---0.85
2/1/2014 9:11 18:56 1.74 540E 0.61 <2.3 <0.85 <0.60 <1.0 <0.14 <0.069 <0.14 <0.69 <0.63 4.8 2.0 <0.86 1.2 2.8 <1.3 <0.71 0.90 <1.2 <2.6 <0.71 <0.86 320E <0.24 <2.6 ---<0.19 <0.19 <0.86 <0.86 ---2.9
11/17/2017 6:05 15:50 11.9 550 <15 <25 <17 <16 <29 <14 <38 <19 12 J <34 15 J <21 <23 <27 <24 <36 <39 4.7 J 5.4 J <28 <19 <23 1100 <32 <28 <18 <19 <26 <47 <23 <41 <21
12/15/2017*6:05 15:50 1 NA 0.60 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 13 <2.9 ---0.57 J <2.0 1.6 J 2.0 4.3 0.56 J ---4.5 3.7 <1.6 <2.0 ---<2.7 <2.4 2.1 <1.6 <2.1 <3.9 <2.0 2.1 J 0.67 J
2/9/2018 7:08 17:10 1 410 E 0.47 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 20 <2.9 8.9 0.40 J <2.0 1.2 J 1.9 J 5.1 0.54 J 160 3.9 1.4 J <1.6 <2.0 980 E <2.7 0.93 J 2.3 <1.6 <2.1 <3.9 <2.0 1.4 J 0.47 J
2/9/2018 (BDS-1)7:08 17:12 1 360 E 0.53 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 20 <2.9 6.5 <1.7 <2.0 1.3 J 2.0 <3.1 0.48 J 190 4.5 <2.4 <1.6 <2.0 330 E <2.7 0.75 J 3.1 <1.6 <2.1 <3.9 <2.0 0.74 J <1.7
11/18/2021 7:43 17:19 2.13 390 <3.4 <11 <5.2 <3.7 NA <4.3 <4.2 <4.2 130 <15 62 1.6 J <5.2 1.8 J 2.9 J 3.8 J <4.4 15 <37 <12 <4.4 NA 1100 E <7.2 <3.1 12 <5.8 <5.7 <5.2 <5.3 6.4 1.7 J
11/18/2021 (BDS-1)7:47 17:21 1.79 410 <2.8 <9.4 <4.4 <3.1 NA <3.6 <3.5 <3.5 140 <13 65 1.5 J <4.4 1.8 J 3.4 J 4.4 J <3.7 16.00 <31 <10 <3.7 NA 1200 E <4.8 <2.6 12 <4.9 <4.8 <4.4 <4.4 6.9 1.6 J
1/13/2022 7:00 16:28 1.62 420 2.5 J <8.5 <4.0 <2.8 NA <3.3 <3.2 <3.2 57 <12 77 <3.5 <4.0 1.5 J 2.4 J <6.2 <3.3 2.7 J <28 <9.6 <3.3 NA 1800 E 1.5 J <2.4 9.5 <4.4 <4.4 <4.0 <4.0 4.5 1.4 J
8/1/2013 9:29 19:57 1.67 420 E 0.35 <2.2 <0.82 <0.57 1.8 <0.14 <0.066 <0.13 1.2 <0.60 5.6 J 0.5 <0.82 1.6 3.6 2.9 <0.68 1.2 5.9 <2.5 <0.68 <0.82 790 E <0.23 <2.5 ---<0.18 <0.18 <0.82 <0.82 ---0.57
8/1/2013 (BDS-1)9:29 19:57 1.81 390 E 0.35 <2.4 <0.88 <0.62 1.5 <0.15 <0.072 <0.14 1.1 <0.65 5.7 J 0.5 <0.89 1.5 3.6 3.1 <0.74 1.0 5.7 <2.7 <0.74 <0.89 730 E <0.24 <2.7 ---<0.20 <0.19 <0.89 <0.89 ---0.5
2/1/2014 9:16 19:16 1.78 55 0.64 <2.3 <0.87 0.65 <1.1 <0.14 <0.070 <0.14 <0.70 0.66 6.9 0.74 <0.88 1.2 2.9 <1.4 1.4 0.97 <1.2 <2.6 <0.73 <0.88 180E 0.32 <2.6 ---<0.19 <0.19 <0.88 <0.88 ---0.91
11/17/2017 6:03 15:11 5.58 350 <7.1 <12 <8.2 <7.7 <13 <6.8 <18 <8.8 5.5 J <16 4.8 J <9.7 <11 <13 <11 <17 36 2.3 J 2.5 J <13 <9.1 <11 740 <15 <13 1.5 J <9.1 <12 <22 <11 <19 <9.7
11/17/2017 (BDS-1)6:04 15:09 8.15 360 <10 <17 <12 <11 <20 <9.9 <26 <13 5.0 J <23 4.3 J <14 <16 <18 <16 <25 33 <23 3.2 J <19 <13 <16 910 <22 <19 <12 <13 <18 <32 <16 <28 <14
12/15/2017*6:03 15:11 1 NA 0.49 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 5.1 <2.9 ---0.45 J <2.0 1.4 J 1.6 J 3.7 35 ---1.9 3.3 <1.6 <2.0 ---<2.7 <2.4 1.6 <1.6 0.88 J <3.9 <2.0 1.3 J 0.40 J
12/15/2017* (BDS-1)6:04 15:09 1 NA 0.52 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 5.5 <2.9 ---0.34 J <2.0 1.5 J 1.6 J 3.9 33 ---2.1 3.1 <1.6 <2.0 ---<2.7 1.2 J 1.4 J <1.6 0.73 J <3.9 <2.0 0.87 J 0.27 J
2/9/2018 7:15 17:15 1 230 E 0.48 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 2.0 <2.9 7.4 0.41 J <2.0 1.2 J 2.2 5.0 13 17 1.1 J 1.2 J <1.6 <2.0 2500 E <2.7 0.71 J 1.8 <1.6 8.6 <3.9 <2.0 1.2 J 0.36 J
11/18/2021 7:52 17:25 7.57 690 <12 <40 <18 <13 NA <15 <15 19 120 <54 87 <16 <19 <21 <19 <29 <16 13 J <130 <45 <16 NA 9600 E <26 <11 16 <21 5500 <19 <19 8.4 J <16
1/13/2022 7:04 16:31 3.87 670 <6.2 <20 <9.4 <6.7 NA <7.8 <7.7 <7.7 36 <28 140 <8.4 <9.5 <11 <9.6 <15 <7.9 2.8 J <67 <23 <7.9 NA 6500 E <13 <5.7 17 <10 <10 <9.5 <9.5 4.6 J <8.4
1/13/2022 (BDS-1)7:07 16:32 1.75 580 2.4 J <9.2 <4.3 <3.0 NA <3.5 <3.5 <3.5 46 <13 92 1.7 J <4.3 1.5 J 2.0 J 1.7 J <3.6 3.1 <30 <10 <3.6 NA 8000 E <5.9 <2.6 10 <4.8 <4.7 <4.3 <4.3 6.2 1.6 J
4/28/2023 7:10 17:10 1.71 150 <0.60 <2.9 <0.65 <0.57 NA <0.72 <0.86 <0.76 29 <0.68 14 J <0.83 <1.0 1.0 J 2.4 J <1.5 <0.97 <0.86 <2.1 1.7 J <2.1 NA 2200 E <1.1 <0.77 <0.83 <0.87 <1.0 <1.5 <1.4 <1.3 <0.69
11/10/2023 7:14 17:19 1.91 520 <0.72 <3.5 <1.1 <1.2 NA <0.84 <2.0 <0.82 85 <3.2 24 <0.99 <1.0 <1.7 <2.2 27 <1.3 <1.0 <2.8 <1.9 <1.5 NA 1900 E <1.7 <2.8 3.3 J <1.3 <1.5 <1.3 <1.2 1.9 J <0.99
11/8/2024 7:22 13:12 1.84 580 <2.9 <9.7 <4.5 <3.2 <5.5 <3.7 <3.6 <3.6 83 <13 54 <4.0 <4.5 <5.2 <4.5 26 <3.8 12 <32 <11 <3.8 <4.5 4500 E <6.2 <2.7 <6.9 <5.0 <4.9 <4.5 <4.5 <8.0 <4.0
8/1/2013 9:13 20:06 1.79 87 0.32 <2.4 <0.87 <0.61 <1.1 <0.14 <0.071 <0.14 <0.71 <0.64 6.0 J 0.43 <0.88 2.0 2.5 1.7 <0.73 29 3.4 <2.6 <0.73 <0.88 130 <0.24 <2.6 ---<0.20 <0.19 <0.88 <0.88 ---0.49
2/1/2014 9:25 18:55 1.75 62 0.65 <2.3 <0.85 <0.60 <1.0 <0.14 <0.069 <0.14 <0.69 <0.63 16 0.91 <0.86 1.3 2.7 1.4 <0.72 120 1.8 <2.6 <0.72 <0.86 87 <0.24 <2.6 ---<0.19 <0.19 <0.86 <0.86 ---1.2
11/17/2017 6:14 15:25 4.05 280 <5.2 <8.5 <5.9 <5.6 <9.7 <4.9 <13 <6.4 3.1 J <12 17 <7.0 <8.0 <9.1 <8.0 <12 <13 49 16 <9.6 <6.6 <8.0 420 <11 <9.6 3.8 J <6.6 <8.7 4.2 J <8.0 2.8 J <7.0
12/15/2017*6:14 15:25 1 NA 0.73 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 3.1 <2.9 ---0.57 J <2.0 1.8 J 1.9 J 1.8 J 0.44 J ---15 3.5 0.69 J <2.0 ---<2.7 <2.4 3.6 <1.6 <2.1 <3.9 <2.0 2.2 J 0.67 J
2/9/2018 6:50 16:48 1 480 E 0.63 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 <1.6 <2.9 12 0.32 J <2.0 1.3 J 2.1 <3.1 0.44 J <2.8 0.53 J 0.86 J <1.6 <2.0 660 E <2.7 <2.4 2.1 <1.6 <2.1 <3.9 <2.0 1.2 J 0.37 J
11/18/2021 7:11 17:04 1.89 680 1.1 J <10 <4.6 <3.2 NA <3.8 <3.7 <3.7 3.4 J <14 150 <4.1 <4.6 2.4 J 3.0 J <7.2 <3.9 1.7 J <33 <11 <3.9 NA 2100 E <6.4 <2.8 5.0 <5.2 <5.1 <4.6 <4.6 3.7 J <4.1
1/13/2022 6:30 16:12 1.75 810 2.8 <9.2 <4.3 <3.0 NA <3.5 <3.5 <3.5 2.2 J <13 180 1.5 J <4.3 1.7 J 2.4 J <6.7 1.5 J 2.5 J <30 3.4 J <3.6 NA 2200 E <5.9 <2.6 10 <4.8 <4.7 <4.3 <4.3 5.0 1.4 J
8/1/2013 9:43 20:25 1.93 6.7 <0.31 <2.5 <0.94 <0.66 <1.2 <0.16 <0.076 <0.15 <0.76 <0.70 2.1 J <0.17 <0.95 1.3 2.5 <1.5 0.79 1.0 <1.3 <2.8 <0.79 <0.95 <2.4 <0.26 <2.8 ---<0.21 <0.21 <0.95 <0.95 ---<0.17
2/1/2014 8:24 18:44 1.7 16 0.61 <2.2 <0.83 <0.58 <1.0 <0.14 <0.067 <0.13 <0.67 <0.61 10 0.81 <0.84 1.2 2.9 <1.3 <0.70 1.0 <1.2 6.5 <0.70 <0.84 14 <0.23 4.5 ---<0.18 <0.18 <0.84 <0.84 ---1.0
11/17/2017 6:45 16:11 1 8.8 J 0.56 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 0.37 J <1.6 <2.9 <1.9 <1.7 <2.0 1.8 J <2.0 <3.1 0.26 J 0.62 J 2.2 1.1 J 0.77 J <2.0 1.4 J 0.35 J <2.4 1.2 J <1.6 6.6 <3.9 <2.0 0.66 J <1.7
2/9/2018 7:35 17:30 1 7.9 J 0.47 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 <1.6 <2.9 3.7 <1.7 <2.0 1.2 J 2.1 <3.1 0.32 J <2.8 0.56 J 0.85 J <1.6 <2.0 1.9 J <2.7 <2.4 1.5 <1.6 <2.1 <3.9 <2.0 0.79 J 0.24 J
11/18/2021 8:03 17:33 1.84 28 <2.9 <9.7 <4.5 <3.2 NA <3.7 <3.6 <3.6 <3.6 <13 88 <4.0 <4.5 1.6 J 2.6 J <7.0 <3.8 1.2 J <32 <11 <3.8 NA 51 <6.2 <2.7 2.9 J <5.0 <4.9 <4.5 <4.5 1.9 J <4.0
1/13/2022 7:35 16:48 1.51 14 J 2.4 J <8.0 <3.7 0.77 J NA <3.0 <3.0 <3.0 <3.0 <11 25 <3.3 <3.7 1.2 J 2.2 J <5.8 <3.1 2.0 J <26 <8.9 <3.1 NA 10 <5.1 <2.2 6.1 <4.1 <4.0 <3.7 <3.7 3.4 <3.3
2/9/2018 6:46 16:45 1 230 E 0.65 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 <1.6 <2.9 9.6 0.27 J <2.0 1.3 J 2.3 <3.1 0.42 J 0.92 J 0.58 J 0.85 J <1.6 <2.0 290 E <2.7 <2.4 2.2 <1.6 <2.1 <3.9 <2.0 1.1 J 0.34 J
11/18/2021 7:02 17:02 1.84 45 1.2 J <9.7 <4.5 <3.2 NA <3.7 <3.6 <3.6 <3.6 <13 10 J <4.0 <4.5 1.8 J 3.0 J <7.0 <3.8 1.0 J <32 <11 <3.8 NA 78 <6.2 <2.7 2.3 J <5.0 <4.9 <4.5 <4.5 1.9 J <4.0
1/13/2022 6:23 16:08 1.55 100 2.7 <8.2 <3.8 0.92 J NA <3.1 <3.1 <3.1 <3.1 <11 31 <3.4 <3.8 1.6 J 2.1 J <5.9 <3.2 2.4 J <27 <9.1 <3.2 NA 140 <5.2 <2.3 7.1 <4.2 <4.2 <3.8 <3.8 3.7 1.2 J
11/17/2017 6:20 15:56 2.1 150 2.0 J <4.4 <3.1 <2.9 <5.1 <2.5 <6.7 <3.3 <3.3 <6.1 6.2 <3.6 <4.1 <4.7 2.4 J <6.4 <6.9 0.93 J 0.87 J <5.0 <3.4 <4.7 150 <5.7 <5.0 1.6 J <3.4 <4.5 <8.3 <4.1 1.3 J <3.6
12/15/2017*6:20 15:56 1 NA 1.8 <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 <1.6 <2.9 ---0.27 J <2.0 1.5 J 2.0 <3.1 0.40 J ---0.90 J 2.6 <1.6 <2.0 ---<2.7 <2.4 1.5 <1.6 <2.1 <3.9 <2.0 1.0 J 0.32 J
2/9/2018 6:42 16:40 1 17 0.59 J <2.1 <1.5 <1.4 <2.4 <1.2 <3.2 <1.6 <1.6 <2.9 4.6 <1.7 <2.0 1.2 J 2.3 2.1 J 0.27 J <2.8 0.56 J 0.96 J <1.6 <2.0 9.3 <2.7 <2.4 1.5 <1.6 <2.1 <3.9 <2.0 0.69 J <1.7
11/18/2021 7:23 17:10 1.89 67 1.5 J <10 <4.6 <3.2 NA <3.8 <3.7 <3.7 2.6 J <14 25 <4.1 <4.6 2.0 J 3.4 J <7.2 <3.9 1.7 J <33 <11 <3.9 NA 100 <6.4 <2.8 3.0 J <5.2 <5.1 <4.6 <4.6 2.4 J <4.1
1/13/2022 6:47 16:21 1.51 21 3.1 <8.0 <3.7 <2.6 NA <3.0 <3.0 <3.0 <3.0 <11 26 1.4 J <3.7 1.3 J 2.3 J <5.8 <3.1 2.0 J <26 <8.9 <3.1 NA 22 <5.1 <2.2 7.1 <4.1 <4.0 <3.7 <3.7 4.7 1.3 J
NE 1.6 NE 0.53 26,000 1.1 7.7 17 180 180 2.5 NE 4.9 NE NE 440 22,000 1,800 3,100 1,200 22,000 13,000 4,400 NE 47 NE 22,000 22,000 3 260 260 440 440
Notes:
All results expressed as micrograms per cubic meter (µg/m3)
* - indicates samples collected on 11/17/2017 were rerun by laboratory
< - indicates concentration was reported below the laboratory limit of detection
E - Value exceeds instrument calibration range
J - Result is less than the reporting limit but greater than or equal to to the method detection limit. The concentration is an approximate value
DCA - dichloroethane
DCE - dichloroethene
Freon 11 - trichlorofluoromethane
Freon 12 - dichlorodifluoromethane
Freon 113 - 1,1,2-trichloro-1,2,2-trifluoroethane
MEK - methyl ethyl ketone (2-butanone)
PCE - tetrachloroethene
TCA - trichloroethane
TCE - trichloroethene
TMB - trimethylbenzene
NA - not analyzed
US EPA - United States Environmental Protection Agency
RSL - Regional Screening Level
NE - not established
BOLD indicates concentration exceeds the RSL
Outdoor
IA-9 Indoor
IndoorIA-10
USEPA Industrial Air RSL (November 2024)
IA-5 Indoor
IA-6 Indoor
IA-7 Indoor
OA-8
Page 2 of 2

Figures

PHONE: [phone] JOB NUMBER:DRAWN BY:CHECKED BY:APPROVED BY:193710866 TH AR CM
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DATE:02/28/20
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PHONE: [phone] JOB NUMBER:DRAWN BY:CHECKED BY:APPROVED BY:193710866 TH AR CM
SITE LAYOUT
FIGURE:
DATE:02/28/20
2FOR:NORTHGROP GRUMMAN SYSTEMSCORPORATION2211 W. NORTH TEMPLESALT LAKE CITY, UTAH
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PHONE: [phone] JOB NUMBER:DRAWN BY:CHECKED BY:APPROVED BY:193710866 TH AR CM
FIGURE:
DATE:06/29/23
3FOR:NORTHGROP GRUMMAN SYSTEMSCORPORATION2211 W. NORTH TEMPLESALT LAKE CITY, UTAH
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ANNUAL INDOOR AND OUTDOORAIR SAMPLING LOCATIONS

Appendix A

Appendix A Indoor Air Sampling Methodology
1 | Page
Indoor air and outdoor ambient air sampling was conducted following guidance outlined in the Office of Solid Waste and Emergency Response (OSWER) Technical Guide for Assessing and
Mitigating the Vapor Intrusion Pathway from Subsurface Vapor Sources to Indoor Air (United
States Environmental Protection Agency – US EPA, June 2015). The event were conducted during a typical heating season configuration for the heating, ventilation, and air conditioning (HVAC) system. US EPA considers the heating season to fall between the months of October
and February.
Indoor Air Sampling Methods
Indoor air and outdoor ambient air samples were collected using 6-liter (L), passivated, individually certified, stainless steel Summa™ canisters fitted with individually certified low-flow controllers set to collect a sample for up to 10 hours. This sample interval was selected as representative of a typical shift schedule for employees. Canisters for indoor air sampling were placed approximately three 3 to 4 feet off the ground. The low-flow controllers were connected
to canisters via a Swaglok™ compression fitting.
The canister for outdoor ambient air sampling was collected concurrent with indoor air sampling and was placed in an area on the building roof near the HVAC system intake associated with
indoor air sample location IA-6.
Indoor Air Sampling Field Parameters
Temperature, relative humidity, carbon monoxide (CO), and carbon dioxide (CO2) were collected on an hourly basis (where access allowed) using an RKI GX-6000 4 gas meter; air speed, and air
speed direction were recording using a TSI 9535 VelociCalc. Volatile organic compound concentrations were recorded using a photoionization detector (PID) MiniRae 3000. Ambient air sampling field parameters were recorded on field sampling data logs, included as Appendix B
and summarized on Table 1.
Indoor Air Sample Collection and Analysis
Summa™ canister starting and ending times, vacuum readings, and field readings were recorded on the field sampling data logs for each event. Canister tags were marked with a unique
identification number and the canisters shipped to the Eurofins Air Toxics, LLC (Eurofins) – Folsom, California laboratory under chain-of-custody (COC) documentation for fixed-base laboratory analysis under US EPA Method TO-15. The COC noted the final canister vacuums
readings and serial numbers of the canisters and corresponding flow controllers. The Eurofins laboratory is certified in the State of Utah.
Sample Storage and Transport
Indoor air and outdoor air confirmation samples were labeled with a unique sample identification
number and placed within secure packaging provided by the laboratory and stored at ambient temperature.
Appendix A Indoor Air Sampling Methodology
2 | Page
Quality Assurance and Quality Control
Analytical data was evaluated for accuracy and precision based on field and laboratory QA/QC
performance. Laboratory analytical reports include a QA/QC check for adherence to holding times. Holding times are established by the US EPA and refer to the maximum allowable time to pass between sample collection and analysis by the laboratory. A 30-day hold-time for Summa™
canister analysis under US EPA Method TO-15 is specified by the US EPA.
The analytical program includes laboratory control spikes and method blanks and are presented as part of the final laboratory report, illustrating the prescribed range of acceptable limits for analytical accuracy.

Appendix B

Appendix C

11/25/2024
Mr. Andrew Riemer
Stantec Consulting Corporation
1165 Scheuring Rd
De Pere WI 54115
Project Name: SLC FACILITY
Project #: 193710866
Dear Mr. Andrew Riemer
The following report includes the data for the above referenced project for sample(s)
received on 11/11/2024 at Eurofins Air Toxics LLC.
The data and associated QC analyzed by TO-15 are compliant with the project
requirements or laboratory criteria with the exception of the deviations noted in the
attached case narrative.
Thank you for choosing Eurofins Air Toxics LLC. for your air analysis needs. Eurofins Air
Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free
to contact the Project Manager: Jade White at 916-985-1000 if you have any questions
regarding the data in this report.
Regards,
Jade White
Project Manager
Workorder #: 2411391
Page 1 of 25
Mr. Andrew Riemer
Stantec Consulting Corporation
1165 Scheuring Rd
De Pere, WI 54115
WORK ORDER #: 2411391
CLIENT:BILL TO:
PHONE:
Accounts Payable
Stantec Consulting Services Inc.
PO Box 6610
Broomfield, CO 80021
[phone]
11/11/2024
DATE COMPLETED:11/25/2024
P.O. #
PROJECT #193710866 SLC FACILITY
Work Order Summary
FAX:
DATE RECEIVED:CONTACT:Jade White
NAMEFRACTION #TEST VAC./PRES.
RECEIPT
PRESSURE
FINAL
01A OA-1 TO-15 9.8 "Hg 1.9 psi
02A IA-2 TO-15 7.1 "Hg 1.9 psi
03A IA-3 TO-15 9.6 "Hg 2.2 psi
04A IA-6 TO-15 11.6 "Hg 1.9 psi
05A DUP-01 TO-15 7.3 "Hg 2 psi
06A Lab Blank TO-15 NA NA
07A CCV TO-15 NA NA
08A LCS TO-15 NA NA
08AA LCSD TO-15 NA NA
CERTIFIED BY:
Technical Director
DATE: 11/25/24
Page 2 of 25
Cert. No.: AZ Licensure-AZ0775, FL NELAP-E87680, LA NELAP–02089, MN NELAP-2703122, NH NELAP–209223-B, NJ NELAP-
CA016, NY NELAP-11291, TX NELAP-T104704434, UT NELAP-CA009332023-16, VA NELAP-12695, WA NELAP-C935
Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) CA300005-20
Eurofins Environment Testing Northern California, LLC certifies that the test results contained in this report meet
all requirements of the 2016 TNI Standard.
This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, LLC.
180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630
[phone]
LABORATORY NARRATIVE
EPA Method TO-15
Stantec Consulting Corporation
Workorder# 2411391
Five 6 Liter Summa Canister (Ambient) samples were received on November 11, 2024. The laboratory
performed analysis via EPA Method TO-15 using GC/MS in the full scan mode.
There were no receiving discrepancies.
Receiving Notes
2-Propanol exceeded the instrument's calibration range for samples IA-3, IA-6, and DUP-01 and were
flagged accordingly.
Analytical Notes
Ten qualifiers may have been used on the data analysis sheets and indicates as follows:
B - Compound present in laboratory blank greater than reporting limit (background subtraction not
performed).
J - Estimated value.
E - Exceeds instrument calibration range.
S - Saturated peak.
Q - Exceeds quality control limits.
U - Compound analyzed for but not detected above the reporting limit, LOD, or MDL value. See
data page for project specific U-flag definition.
UJ- Non-detected compound associated with low bias in the CCV
N - The identification is based on presumptive evidence.
M - Reported value may be biased due to apparent matrix interferences.
CN - See Case Narrative.
File extensions may have been used on the data analysis sheets and indicates
as follows:
a-File was requantified
b-File was quantified by a second column and detector
r1-File was requantified for the purpose of reissue
Definition of Data Qualifying Flags
Page 3 of 25
EPA METHOD TO-15 GC/MS FULL SCAN
Summary of Detected Compounds
Client Sample ID: OA-1
Lab ID#: 2411391-01A
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
8.4 18 20 42Acetone
3.4 36 8.2 892-Propanol
0.84 1.1 3.3 4.5trans-1,2-Dichloroethene
Client Sample ID: IA-2
Lab ID#: 2411391-02A
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
7.4 15 14 28Ethanol
7.4 110 18 270Acetone
3.0 320 7.3 8002-Propanol
0.74 36 2.9 140trans-1,2-Dichloroethene
0.74 4.2 2.6 15Hexane
Client Sample ID: IA-3
Lab ID#: 2411391-03A
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
8.4 15 16 29Ethanol
8.4 220 20 540Acetone
3.4 640 E 8.3 1600 E2-Propanol
Client Sample ID: IA-6
Lab ID#: 2411391-04A
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
9.2 28 17 54Ethanol
0.92 3.4 7.0 26Freon 113
9.2 240 22 580Acetone
3.7 1800 E 9.0 4500 E2-Propanol
0.92 21 3.6 83trans-1,2-Dichloroethene
0.92 3.5 3.2 12Hexane
Page 4 of 25
EPA METHOD TO-15 GC/MS FULL SCAN
Summary of Detected Compounds
Client Sample ID: DUP-01
Lab ID#: 2411391-05A
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
7.5 20 14 39Ethanol
7.5 120 18 270Acetone
3.0 370 E 7.4 900 E2-Propanol
0.75 37 3.0 150trans-1,2-Dichloroethene
0.75 4.2 2.6 15Hexane
Page 5 of 25
Client Sample ID: OA-1
Lab ID#: 2411391-01A
EPA METHOD TO-15 GC/MS FULL SCAN
17112318File Name:
Dil. Factor:1.68
Date of Collection: 11/8/24 2:43:00 PM
Date of Analysis: 11/23/24 09:55 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.84 Not Detected 4.2 Not DetectedFreon 12
0.84 Not Detected 5.9 Not DetectedFreon 114
8.4 Not Detected 17 Not DetectedChloromethane
0.84 Not Detected 2.1 Not DetectedVinyl Chloride
0.84 Not Detected 1.8 Not Detected1,3-Butadiene
8.4 Not Detected 33 Not DetectedBromomethane
3.4 Not Detected 8.9 Not DetectedChloroethane
0.84 Not Detected 4.7 Not DetectedFreon 11
8.4 Not Detected 16 Not DetectedEthanol
0.84 Not Detected 6.4 Not DetectedFreon 113
0.84 Not Detected 3.3 Not Detected1,1-Dichloroethene
8.4 18 20 42Acetone
3.4 36 8.2 892-Propanol
3.4 Not Detected 10 Not DetectedCarbon Disulfide
3.4 Not Detected 10 Not Detected3-Chloropropene
8.4 Not Detected 29 Not DetectedMethylene Chloride
3.4 Not Detected 12 Not DetectedMethyl tert-butyl ether
0.84 1.1 3.3 4.5trans-1,2-Dichloroethene
0.84 Not Detected 3.0 Not DetectedHexane
0.84 Not Detected 3.4 Not Detected1,1-Dichloroethane
3.4 Not Detected 9.9 Not Detected2-Butanone (Methyl Ethyl Ketone)
0.84 Not Detected 3.3 Not Detectedcis-1,2-Dichloroethene
0.84 Not Detected 2.5 Not DetectedTetrahydrofuran
0.84 Not Detected 4.1 Not DetectedChloroform
0.84 Not Detected 4.6 Not Detected1,1,1-Trichloroethane
0.84 Not Detected 2.9 Not DetectedCyclohexane
0.84 Not Detected 5.3 Not DetectedCarbon Tetrachloride
0.84 Not Detected 3.9 Not Detected2,2,4-Trimethylpentane
0.84 Not Detected 2.7 Not DetectedBenzene
0.84 Not Detected 3.4 Not Detected1,2-Dichloroethane
0.84 Not Detected 3.4 Not DetectedHeptane
0.84 Not Detected 4.5 Not DetectedTrichloroethene
0.84 Not Detected 3.9 Not Detected1,2-Dichloropropane
3.4 Not Detected 12 Not Detected1,4-Dioxane
0.84 Not Detected 5.6 Not DetectedBromodichloromethane
0.84 Not Detected 3.8 Not Detectedcis-1,3-Dichloropropene
0.84 Not Detected 3.4 Not Detected4-Methyl-2-pentanone
1.7 Not Detected 6.3 Not DetectedToluene
0.84 Not Detected 3.8 Not Detectedtrans-1,3-Dichloropropene
0.84 Not Detected 4.6 Not Detected1,1,2-Trichloroethane
0.84 Not Detected 5.7 Not DetectedTetrachloroethene
3.4 Not Detected 14 Not Detected2-Hexanone
Page 6 of 25
Client Sample ID: OA-1
Lab ID#: 2411391-01A
EPA METHOD TO-15 GC/MS FULL SCAN
17112318File Name:
Dil. Factor:1.68
Date of Collection: 11/8/24 2:43:00 PM
Date of Analysis: 11/23/24 09:55 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.84 Not Detected 7.2 Not DetectedDibromochloromethane
0.84 Not Detected 6.4 Not Detected1,2-Dibromoethane (EDB)
0.84 Not Detected 3.9 Not DetectedChlorobenzene
0.84 Not Detected 3.6 Not DetectedEthyl Benzene
1.7 Not Detected 7.3 Not Detectedm,p-Xylene
0.84 Not Detected 3.6 Not Detectedo-Xylene
0.84 Not Detected 3.6 Not DetectedStyrene
0.84 Not Detected 8.7 Not DetectedBromoform
0.84 Not Detected 4.1 Not DetectedCumene
0.84 Not Detected 5.8 Not Detected1,1,2,2-Tetrachloroethane
0.84 Not Detected 4.1 Not DetectedPropylbenzene
0.84 Not Detected 4.1 Not Detected4-Ethyltoluene
0.84 Not Detected 4.1 Not Detected1,3,5-Trimethylbenzene
0.84 Not Detected 4.1 Not Detected1,2,4-Trimethylbenzene
0.84 Not Detected 5.0 Not Detected1,3-Dichlorobenzene
0.84 Not Detected 5.0 Not Detected1,4-Dichlorobenzene
0.84 Not Detected 4.3 Not Detectedalpha-Chlorotoluene
0.84 Not Detected 5.0 Not Detected1,2-Dichlorobenzene
3.4 Not Detected 25 Not Detected1,2,4-Trichlorobenzene
3.4 Not Detected 36 Not DetectedHexachlorobutadiene
1.7 Not Detected 8.8 Not DetectedNaphthalene
Container Type: 6 Liter Summa Canister (Ambient)
Limits%RecoverySurrogates
Method
101 70-130Toluene-d8
99 70-1301,2-Dichloroethane-d4
95 70-1304-Bromofluorobenzene
Page 7 of 25
Client Sample ID: IA-2
Lab ID#: 2411391-02A
EPA METHOD TO-15 GC/MS FULL SCAN
17112319File Name:
Dil. Factor:1.48
Date of Collection: 11/8/24 4:35:00 PM
Date of Analysis: 11/23/24 10:24 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.74 Not Detected 3.6 Not DetectedFreon 12
0.74 Not Detected 5.2 Not DetectedFreon 114
7.4 Not Detected 15 Not DetectedChloromethane
0.74 Not Detected 1.9 Not DetectedVinyl Chloride
0.74 Not Detected 1.6 Not Detected1,3-Butadiene
7.4 Not Detected 29 Not DetectedBromomethane
3.0 Not Detected 7.8 Not DetectedChloroethane
0.74 Not Detected 4.2 Not DetectedFreon 11
7.4 15 14 28Ethanol
0.74 Not Detected 5.7 Not DetectedFreon 113
0.74 Not Detected 2.9 Not Detected1,1-Dichloroethene
7.4 110 18 270Acetone
3.0 320 7.3 8002-Propanol
3.0 Not Detected 9.2 Not DetectedCarbon Disulfide
3.0 Not Detected 9.3 Not Detected3-Chloropropene
7.4 Not Detected 26 Not DetectedMethylene Chloride
3.0 Not Detected 11 Not DetectedMethyl tert-butyl ether
0.74 36 2.9 140trans-1,2-Dichloroethene
0.74 4.2 2.6 15Hexane
0.74 Not Detected 3.0 Not Detected1,1-Dichloroethane
3.0 Not Detected 8.7 Not Detected2-Butanone (Methyl Ethyl Ketone)
0.74 Not Detected 2.9 Not Detectedcis-1,2-Dichloroethene
0.74 Not Detected 2.2 Not DetectedTetrahydrofuran
0.74 Not Detected 3.6 Not DetectedChloroform
0.74 Not Detected 4.0 Not Detected1,1,1-Trichloroethane
0.74 Not Detected 2.5 Not DetectedCyclohexane
0.74 Not Detected 4.6 Not DetectedCarbon Tetrachloride
0.74 Not Detected 3.4 Not Detected2,2,4-Trimethylpentane
0.74 Not Detected 2.4 Not DetectedBenzene
0.74 Not Detected 3.0 Not Detected1,2-Dichloroethane
0.74 Not Detected 3.0 Not DetectedHeptane
0.74 Not Detected 4.0 Not DetectedTrichloroethene
0.74 Not Detected 3.4 Not Detected1,2-Dichloropropane
3.0 Not Detected 11 Not Detected1,4-Dioxane
0.74 Not Detected 5.0 Not DetectedBromodichloromethane
0.74 Not Detected 3.4 Not Detectedcis-1,3-Dichloropropene
0.74 Not Detected 3.0 Not Detected4-Methyl-2-pentanone
1.5 Not Detected 5.6 Not DetectedToluene
0.74 Not Detected 3.4 Not Detectedtrans-1,3-Dichloropropene
0.74 Not Detected 4.0 Not Detected1,1,2-Trichloroethane
0.74 Not Detected 5.0 Not DetectedTetrachloroethene
3.0 Not Detected 12 Not Detected2-Hexanone
Page 8 of 25
Client Sample ID: IA-2
Lab ID#: 2411391-02A
EPA METHOD TO-15 GC/MS FULL SCAN
17112319File Name:
Dil. Factor:1.48
Date of Collection: 11/8/24 4:35:00 PM
Date of Analysis: 11/23/24 10:24 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.74 Not Detected 6.3 Not DetectedDibromochloromethane
0.74 Not Detected 5.7 Not Detected1,2-Dibromoethane (EDB)
0.74 Not Detected 3.4 Not DetectedChlorobenzene
0.74 Not Detected 3.2 Not DetectedEthyl Benzene
1.5 Not Detected 6.4 Not Detectedm,p-Xylene
0.74 Not Detected 3.2 Not Detectedo-Xylene
0.74 Not Detected 3.2 Not DetectedStyrene
0.74 Not Detected 7.6 Not DetectedBromoform
0.74 Not Detected 3.6 Not DetectedCumene
0.74 Not Detected 5.1 Not Detected1,1,2,2-Tetrachloroethane
0.74 Not Detected 3.6 Not DetectedPropylbenzene
0.74 Not Detected 3.6 Not Detected4-Ethyltoluene
0.74 Not Detected 3.6 Not Detected1,3,5-Trimethylbenzene
0.74 Not Detected 3.6 Not Detected1,2,4-Trimethylbenzene
0.74 Not Detected 4.4 Not Detected1,3-Dichlorobenzene
0.74 Not Detected 4.4 Not Detected1,4-Dichlorobenzene
0.74 Not Detected 3.8 Not Detectedalpha-Chlorotoluene
0.74 Not Detected 4.4 Not Detected1,2-Dichlorobenzene
3.0 Not Detected 22 Not Detected1,2,4-Trichlorobenzene
3.0 Not Detected 32 Not DetectedHexachlorobutadiene
1.5 Not Detected 7.8 Not DetectedNaphthalene
Container Type: 6 Liter Summa Canister (Ambient)
Limits%RecoverySurrogates
Method
103 70-130Toluene-d8
102 70-1301,2-Dichloroethane-d4
96 70-1304-Bromofluorobenzene
Page 9 of 25
Client Sample ID: IA-3
Lab ID#: 2411391-03A
EPA METHOD TO-15 GC/MS FULL SCAN
17112320File Name:
Dil. Factor:1.69
Date of Collection: 11/8/24 4:40:00 PM
Date of Analysis: 11/23/24 10:53 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.84 Not Detected 4.2 Not DetectedFreon 12
0.84 Not Detected 5.9 Not DetectedFreon 114
8.4 Not Detected 17 Not DetectedChloromethane
0.84 Not Detected 2.2 Not DetectedVinyl Chloride
0.84 Not Detected 1.9 Not Detected1,3-Butadiene
8.4 Not Detected 33 Not DetectedBromomethane
3.4 Not Detected 8.9 Not DetectedChloroethane
0.84 Not Detected 4.7 Not DetectedFreon 11
8.4 15 16 29Ethanol
0.84 Not Detected 6.5 Not DetectedFreon 113
0.84 Not Detected 3.4 Not Detected1,1-Dichloroethene
8.4 220 20 540Acetone
3.4 640 E 8.3 1600 E2-Propanol
3.4 Not Detected 10 Not DetectedCarbon Disulfide
3.4 Not Detected 10 Not Detected3-Chloropropene
8.4 Not Detected 29 Not DetectedMethylene Chloride
3.4 Not Detected 12 Not DetectedMethyl tert-butyl ether
0.84 Not Detected 3.4 Not Detectedtrans-1,2-Dichloroethene
0.84 Not Detected 3.0 Not DetectedHexane
0.84 Not Detected 3.4 Not Detected1,1-Dichloroethane
3.4 Not Detected 10 Not Detected2-Butanone (Methyl Ethyl Ketone)
0.84 Not Detected 3.4 Not Detectedcis-1,2-Dichloroethene
0.84 Not Detected 2.5 Not DetectedTetrahydrofuran
0.84 Not Detected 4.1 Not DetectedChloroform
0.84 Not Detected 4.6 Not Detected1,1,1-Trichloroethane
0.84 Not Detected 2.9 Not DetectedCyclohexane
0.84 Not Detected 5.3 Not DetectedCarbon Tetrachloride
0.84 Not Detected 3.9 Not Detected2,2,4-Trimethylpentane
0.84 Not Detected 2.7 Not DetectedBenzene
0.84 Not Detected 3.4 Not Detected1,2-Dichloroethane
0.84 Not Detected 3.5 Not DetectedHeptane
0.84 Not Detected 4.5 Not DetectedTrichloroethene
0.84 Not Detected 3.9 Not Detected1,2-Dichloropropane
3.4 Not Detected 12 Not Detected1,4-Dioxane
0.84 Not Detected 5.7 Not DetectedBromodichloromethane
0.84 Not Detected 3.8 Not Detectedcis-1,3-Dichloropropene
0.84 Not Detected 3.5 Not Detected4-Methyl-2-pentanone
1.7 Not Detected 6.4 Not DetectedToluene
0.84 Not Detected 3.8 Not Detectedtrans-1,3-Dichloropropene
0.84 Not Detected 4.6 Not Detected1,1,2-Trichloroethane
0.84 Not Detected 5.7 Not DetectedTetrachloroethene
3.4 Not Detected 14 Not Detected2-Hexanone
Page 10 of 25
Client Sample ID: IA-3
Lab ID#: 2411391-03A
EPA METHOD TO-15 GC/MS FULL SCAN
17112320File Name:
Dil. Factor:1.69
Date of Collection: 11/8/24 4:40:00 PM
Date of Analysis: 11/23/24 10:53 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.84 Not Detected 7.2 Not DetectedDibromochloromethane
0.84 Not Detected 6.5 Not Detected1,2-Dibromoethane (EDB)
0.84 Not Detected 3.9 Not DetectedChlorobenzene
0.84 Not Detected 3.7 Not DetectedEthyl Benzene
1.7 Not Detected 7.3 Not Detectedm,p-Xylene
0.84 Not Detected 3.7 Not Detectedo-Xylene
0.84 Not Detected 3.6 Not DetectedStyrene
0.84 Not Detected 8.7 Not DetectedBromoform
0.84 Not Detected 4.2 Not DetectedCumene
0.84 Not Detected 5.8 Not Detected1,1,2,2-Tetrachloroethane
0.84 Not Detected 4.2 Not DetectedPropylbenzene
0.84 Not Detected 4.2 Not Detected4-Ethyltoluene
0.84 Not Detected 4.2 Not Detected1,3,5-Trimethylbenzene
0.84 Not Detected 4.2 Not Detected1,2,4-Trimethylbenzene
0.84 Not Detected 5.1 Not Detected1,3-Dichlorobenzene
0.84 Not Detected 5.1 Not Detected1,4-Dichlorobenzene
0.84 Not Detected 4.4 Not Detectedalpha-Chlorotoluene
0.84 Not Detected 5.1 Not Detected1,2-Dichlorobenzene
3.4 Not Detected 25 Not Detected1,2,4-Trichlorobenzene
3.4 Not Detected 36 Not DetectedHexachlorobutadiene
1.7 Not Detected 8.8 Not DetectedNaphthalene
E = Exceeds instrument calibration range.
Container Type: 6 Liter Summa Canister (Ambient)
Limits%RecoverySurrogates
Method
103 70-130Toluene-d8
103 70-1301,2-Dichloroethane-d4
97 70-1304-Bromofluorobenzene
Page 11 of 25
Client Sample ID: IA-6
Lab ID#: 2411391-04A
EPA METHOD TO-15 GC/MS FULL SCAN
17112321File Name:
Dil. Factor:1.84
Date of Collection: 11/8/24 1:12:00 PM
Date of Analysis: 11/23/24 11:23 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.92 Not Detected 4.5 Not DetectedFreon 12
0.92 Not Detected 6.4 Not DetectedFreon 114
9.2 Not Detected 19 Not DetectedChloromethane
0.92 Not Detected 2.4 Not DetectedVinyl Chloride
0.92 Not Detected 2.0 Not Detected1,3-Butadiene
9.2 Not Detected 36 Not DetectedBromomethane
3.7 Not Detected 9.7 Not DetectedChloroethane
0.92 Not Detected 5.2 Not DetectedFreon 11
9.2 28 17 54Ethanol
0.92 3.4 7.0 26Freon 113
0.92 Not Detected 3.6 Not Detected1,1-Dichloroethene
9.2 240 22 580Acetone
3.7 1800 E 9.0 4500 E2-Propanol
3.7 Not Detected 11 Not DetectedCarbon Disulfide
3.7 Not Detected 12 Not Detected3-Chloropropene
9.2 Not Detected 32 Not DetectedMethylene Chloride
3.7 Not Detected 13 Not DetectedMethyl tert-butyl ether
0.92 21 3.6 83trans-1,2-Dichloroethene
0.92 3.5 3.2 12Hexane
0.92 Not Detected 3.7 Not Detected1,1-Dichloroethane
3.7 Not Detected 11 Not Detected2-Butanone (Methyl Ethyl Ketone)
0.92 Not Detected 3.6 Not Detectedcis-1,2-Dichloroethene
0.92 Not Detected 2.7 Not DetectedTetrahydrofuran
0.92 Not Detected 4.5 Not DetectedChloroform
0.92 Not Detected 5.0 Not Detected1,1,1-Trichloroethane
0.92 Not Detected 3.2 Not DetectedCyclohexane
0.92 Not Detected 5.8 Not DetectedCarbon Tetrachloride
0.92 Not Detected 4.3 Not Detected2,2,4-Trimethylpentane
0.92 Not Detected 2.9 Not DetectedBenzene
0.92 Not Detected 3.7 Not Detected1,2-Dichloroethane
0.92 Not Detected 3.8 Not DetectedHeptane
0.92 Not Detected 4.9 Not DetectedTrichloroethene
0.92 Not Detected 4.2 Not Detected1,2-Dichloropropane
3.7 Not Detected 13 Not Detected1,4-Dioxane
0.92 Not Detected 6.2 Not DetectedBromodichloromethane
0.92 Not Detected 4.2 Not Detectedcis-1,3-Dichloropropene
0.92 Not Detected 3.8 Not Detected4-Methyl-2-pentanone
1.8 Not Detected 6.9 Not DetectedToluene
0.92 Not Detected 4.2 Not Detectedtrans-1,3-Dichloropropene
0.92 Not Detected 5.0 Not Detected1,1,2-Trichloroethane
0.92 Not Detected 6.2 Not DetectedTetrachloroethene
3.7 Not Detected 15 Not Detected2-Hexanone
Page 12 of 25
Client Sample ID: IA-6
Lab ID#: 2411391-04A
EPA METHOD TO-15 GC/MS FULL SCAN
17112321File Name:
Dil. Factor:1.84
Date of Collection: 11/8/24 1:12:00 PM
Date of Analysis: 11/23/24 11:23 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.92 Not Detected 7.8 Not DetectedDibromochloromethane
0.92 Not Detected 7.1 Not Detected1,2-Dibromoethane (EDB)
0.92 Not Detected 4.2 Not DetectedChlorobenzene
0.92 Not Detected 4.0 Not DetectedEthyl Benzene
1.8 Not Detected 8.0 Not Detectedm,p-Xylene
0.92 Not Detected 4.0 Not Detectedo-Xylene
0.92 Not Detected 3.9 Not DetectedStyrene
0.92 Not Detected 9.5 Not DetectedBromoform
0.92 Not Detected 4.5 Not DetectedCumene
0.92 Not Detected 6.3 Not Detected1,1,2,2-Tetrachloroethane
0.92 Not Detected 4.5 Not DetectedPropylbenzene
0.92 Not Detected 4.5 Not Detected4-Ethyltoluene
0.92 Not Detected 4.5 Not Detected1,3,5-Trimethylbenzene
0.92 Not Detected 4.5 Not Detected1,2,4-Trimethylbenzene
0.92 Not Detected 5.5 Not Detected1,3-Dichlorobenzene
0.92 Not Detected 5.5 Not Detected1,4-Dichlorobenzene
0.92 Not Detected 4.8 Not Detectedalpha-Chlorotoluene
0.92 Not Detected 5.5 Not Detected1,2-Dichlorobenzene
3.7 Not Detected 27 Not Detected1,2,4-Trichlorobenzene
3.7 Not Detected 39 Not DetectedHexachlorobutadiene
1.8 Not Detected 9.6 Not DetectedNaphthalene
E = Exceeds instrument calibration range.
Container Type: 6 Liter Summa Canister (Ambient)
Limits%RecoverySurrogates
Method
102 70-130Toluene-d8
102 70-1301,2-Dichloroethane-d4
97 70-1304-Bromofluorobenzene
Page 13 of 25
Client Sample ID: DUP-01
Lab ID#: 2411391-05A
EPA METHOD TO-15 GC/MS FULL SCAN
17112322File Name:
Dil. Factor:1.50
Date of Collection: 11/8/24 3:55:00 PM
Date of Analysis: 11/23/24 11:52 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.75 Not Detected 3.7 Not DetectedFreon 12
0.75 Not Detected 5.2 Not DetectedFreon 114
7.5 Not Detected 15 Not DetectedChloromethane
0.75 Not Detected 1.9 Not DetectedVinyl Chloride
0.75 Not Detected 1.6 Not Detected1,3-Butadiene
7.5 Not Detected 29 Not DetectedBromomethane
3.0 Not Detected 7.9 Not DetectedChloroethane
0.75 Not Detected 4.2 Not DetectedFreon 11
7.5 20 14 39Ethanol
0.75 Not Detected 5.7 Not DetectedFreon 113
0.75 Not Detected 3.0 Not Detected1,1-Dichloroethene
7.5 120 18 270Acetone
3.0 370 E 7.4 900 E2-Propanol
3.0 Not Detected 9.3 Not DetectedCarbon Disulfide
3.0 Not Detected 9.4 Not Detected3-Chloropropene
7.5 Not Detected 26 Not DetectedMethylene Chloride
3.0 Not Detected 11 Not DetectedMethyl tert-butyl ether
0.75 37 3.0 150trans-1,2-Dichloroethene
0.75 4.2 2.6 15Hexane
0.75 Not Detected 3.0 Not Detected1,1-Dichloroethane
3.0 Not Detected 8.8 Not Detected2-Butanone (Methyl Ethyl Ketone)
0.75 Not Detected 3.0 Not Detectedcis-1,2-Dichloroethene
0.75 Not Detected 2.2 Not DetectedTetrahydrofuran
0.75 Not Detected 3.7 Not DetectedChloroform
0.75 Not Detected 4.1 Not Detected1,1,1-Trichloroethane
0.75 Not Detected 2.6 Not DetectedCyclohexane
0.75 Not Detected 4.7 Not DetectedCarbon Tetrachloride
0.75 Not Detected 3.5 Not Detected2,2,4-Trimethylpentane
0.75 Not Detected 2.4 Not DetectedBenzene
0.75 Not Detected 3.0 Not Detected1,2-Dichloroethane
0.75 Not Detected 3.1 Not DetectedHeptane
0.75 Not Detected 4.0 Not DetectedTrichloroethene
0.75 Not Detected 3.5 Not Detected1,2-Dichloropropane
3.0 Not Detected 11 Not Detected1,4-Dioxane
0.75 Not Detected 5.0 Not DetectedBromodichloromethane
0.75 Not Detected 3.4 Not Detectedcis-1,3-Dichloropropene
0.75 Not Detected 3.1 Not Detected4-Methyl-2-pentanone
1.5 Not Detected 5.6 Not DetectedToluene
0.75 Not Detected 3.4 Not Detectedtrans-1,3-Dichloropropene
0.75 Not Detected 4.1 Not Detected1,1,2-Trichloroethane
0.75 Not Detected 5.1 Not DetectedTetrachloroethene
3.0 Not Detected 12 Not Detected2-Hexanone
Page 14 of 25
Client Sample ID: DUP-01
Lab ID#: 2411391-05A
EPA METHOD TO-15 GC/MS FULL SCAN
17112322File Name:
Dil. Factor:1.50
Date of Collection: 11/8/24 3:55:00 PM
Date of Analysis: 11/23/24 11:52 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.75 Not Detected 6.4 Not DetectedDibromochloromethane
0.75 Not Detected 5.8 Not Detected1,2-Dibromoethane (EDB)
0.75 Not Detected 3.4 Not DetectedChlorobenzene
0.75 Not Detected 3.2 Not DetectedEthyl Benzene
1.5 Not Detected 6.5 Not Detectedm,p-Xylene
0.75 Not Detected 3.2 Not Detectedo-Xylene
0.75 Not Detected 3.2 Not DetectedStyrene
0.75 Not Detected 7.8 Not DetectedBromoform
0.75 Not Detected 3.7 Not DetectedCumene
0.75 Not Detected 5.1 Not Detected1,1,2,2-Tetrachloroethane
0.75 Not Detected 3.7 Not DetectedPropylbenzene
0.75 Not Detected 3.7 Not Detected4-Ethyltoluene
0.75 Not Detected 3.7 Not Detected1,3,5-Trimethylbenzene
0.75 Not Detected 3.7 Not Detected1,2,4-Trimethylbenzene
0.75 Not Detected 4.5 Not Detected1,3-Dichlorobenzene
0.75 Not Detected 4.5 Not Detected1,4-Dichlorobenzene
0.75 Not Detected 3.9 Not Detectedalpha-Chlorotoluene
0.75 Not Detected 4.5 Not Detected1,2-Dichlorobenzene
3.0 Not Detected 22 Not Detected1,2,4-Trichlorobenzene
3.0 Not Detected 32 Not DetectedHexachlorobutadiene
1.5 Not Detected 7.9 Not DetectedNaphthalene
E = Exceeds instrument calibration range.
Container Type: 6 Liter Summa Canister (Ambient)
Limits%RecoverySurrogates
Method
101 70-130Toluene-d8
101 70-1301,2-Dichloroethane-d4
95 70-1304-Bromofluorobenzene
Page 15 of 25
Client Sample ID: Lab Blank
Lab ID#: 2411391-06A
EPA METHOD TO-15 GC/MS FULL SCAN
17112306File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 11/23/24 01:13 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.50 Not Detected 2.5 Not DetectedFreon 12
0.50 Not Detected 3.5 Not DetectedFreon 114
5.0 Not Detected 10 Not DetectedChloromethane
0.50 Not Detected 1.3 Not DetectedVinyl Chloride
0.50 Not Detected 1.1 Not Detected1,3-Butadiene
5.0 Not Detected 19 Not DetectedBromomethane
2.0 Not Detected 5.3 Not DetectedChloroethane
0.50 Not Detected 2.8 Not DetectedFreon 11
5.0 Not Detected 9.4 Not DetectedEthanol
0.50 Not Detected 3.8 Not DetectedFreon 113
0.50 Not Detected 2.0 Not Detected1,1-Dichloroethene
5.0 Not Detected 12 Not DetectedAcetone
2.0 Not Detected 4.9 Not Detected2-Propanol
2.0 Not Detected 6.2 Not DetectedCarbon Disulfide
2.0 Not Detected 6.3 Not Detected3-Chloropropene
5.0 Not Detected 17 Not DetectedMethylene Chloride
2.0 Not Detected 7.2 Not DetectedMethyl tert-butyl ether
0.50 Not Detected 2.0 Not Detectedtrans-1,2-Dichloroethene
0.50 Not Detected 1.8 Not DetectedHexane
0.50 Not Detected 2.0 Not Detected1,1-Dichloroethane
2.0 Not Detected 5.9 Not Detected2-Butanone (Methyl Ethyl Ketone)
0.50 Not Detected 2.0 Not Detectedcis-1,2-Dichloroethene
0.50 Not Detected 1.5 Not DetectedTetrahydrofuran
0.50 Not Detected 2.4 Not DetectedChloroform
0.50 Not Detected 2.7 Not Detected1,1,1-Trichloroethane
0.50 Not Detected 1.7 Not DetectedCyclohexane
0.50 Not Detected 3.1 Not DetectedCarbon Tetrachloride
0.50 Not Detected 2.3 Not Detected2,2,4-Trimethylpentane
0.50 Not Detected 1.6 Not DetectedBenzene
0.50 Not Detected 2.0 Not Detected1,2-Dichloroethane
0.50 Not Detected 2.0 Not DetectedHeptane
0.50 Not Detected 2.7 Not DetectedTrichloroethene
0.50 Not Detected 2.3 Not Detected1,2-Dichloropropane
2.0 Not Detected 7.2 Not Detected1,4-Dioxane
0.50 Not Detected 3.4 Not DetectedBromodichloromethane
0.50 Not Detected 2.3 Not Detectedcis-1,3-Dichloropropene
0.50 Not Detected 2.0 Not Detected4-Methyl-2-pentanone
1.0 Not Detected 3.8 Not DetectedToluene
0.50 Not Detected 2.3 Not Detectedtrans-1,3-Dichloropropene
0.50 Not Detected 2.7 Not Detected1,1,2-Trichloroethane
0.50 Not Detected 3.4 Not DetectedTetrachloroethene
2.0 Not Detected 8.2 Not Detected2-Hexanone
Page 16 of 25
Client Sample ID: Lab Blank
Lab ID#: 2411391-06A
EPA METHOD TO-15 GC/MS FULL SCAN
17112306File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 11/23/24 01:13 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.50 Not Detected 4.2 Not DetectedDibromochloromethane
0.50 Not Detected 3.8 Not Detected1,2-Dibromoethane (EDB)
0.50 Not Detected 2.3 Not DetectedChlorobenzene
0.50 Not Detected 2.2 Not DetectedEthyl Benzene
1.0 Not Detected 4.3 Not Detectedm,p-Xylene
0.50 Not Detected 2.2 Not Detectedo-Xylene
0.50 Not Detected 2.1 Not DetectedStyrene
0.50 Not Detected 5.2 Not DetectedBromoform
0.50 Not Detected 2.4 Not DetectedCumene
0.50 Not Detected 3.4 Not Detected1,1,2,2-Tetrachloroethane
0.50 Not Detected 2.4 Not DetectedPropylbenzene
0.50 Not Detected 2.4 Not Detected4-Ethyltoluene
0.50 Not Detected 2.4 Not Detected1,3,5-Trimethylbenzene
0.50 Not Detected 2.4 Not Detected1,2,4-Trimethylbenzene
0.50 Not Detected 3.0 Not Detected1,3-Dichlorobenzene
0.50 Not Detected 3.0 Not Detected1,4-Dichlorobenzene
0.50 Not Detected 2.6 Not Detectedalpha-Chlorotoluene
0.50 Not Detected 3.0 Not Detected1,2-Dichlorobenzene
2.0 Not Detected 15 Not Detected1,2,4-Trichlorobenzene
2.0 Not Detected 21 Not DetectedHexachlorobutadiene
1.0 Not Detected 5.2 Not DetectedNaphthalene
Container Type: NA - Not Applicable
Limits%RecoverySurrogates
Method
102 70-130Toluene-d8
102 70-1301,2-Dichloroethane-d4
98 70-1304-Bromofluorobenzene
Page 17 of 25
Client Sample ID: CCV
Lab ID#: 2411391-07A
EPA METHOD TO-15 GC/MS FULL SCAN
17112303File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 11/23/24 11:50 AM
%RecoveryCompound
113Freon 12
103Freon 114
113Chloromethane
106Vinyl Chloride
971,3-Butadiene
109Bromomethane
106Chloroethane
103Freon 11
96Ethanol
102Freon 113
981,1-Dichloroethene
89Acetone
952-Propanol
95Carbon Disulfide
913-Chloropropene
105Methylene Chloride
97Methyl tert-butyl ether
98trans-1,2-Dichloroethene
98Hexane
981,1-Dichloroethane
1022-Butanone (Methyl Ethyl Ketone)
97cis-1,2-Dichloroethene
95Tetrahydrofuran
102Chloroform
1021,1,1-Trichloroethane
95Cyclohexane
101Carbon Tetrachloride
1032,2,4-Trimethylpentane
103Benzene
1041,2-Dichloroethane
98Heptane
102Trichloroethene
991,2-Dichloropropane
1051,4-Dioxane
107Bromodichloromethane
99cis-1,3-Dichloropropene
984-Methyl-2-pentanone
101Toluene
102trans-1,3-Dichloropropene
1041,1,2-Trichloroethane
102Tetrachloroethene
1002-Hexanone
Page 18 of 25
Client Sample ID: CCV
Lab ID#: 2411391-07A
EPA METHOD TO-15 GC/MS FULL SCAN
17112303File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 11/23/24 11:50 AM
%RecoveryCompound
104Dibromochloromethane
1041,2-Dibromoethane (EDB)
103Chlorobenzene
100Ethyl Benzene
102m,p-Xylene
98o-Xylene
101Styrene
104Bromoform
102Cumene
1091,1,2,2-Tetrachloroethane
100Propylbenzene
1054-Ethyltoluene
1011,3,5-Trimethylbenzene
1031,2,4-Trimethylbenzene
1051,3-Dichlorobenzene
1051,4-Dichlorobenzene
106alpha-Chlorotoluene
1061,2-Dichlorobenzene
1061,2,4-Trichlorobenzene
103Hexachlorobutadiene
102Naphthalene
Container Type: NA - Not Applicable
Limits%RecoverySurrogates
Method
103 70-130Toluene-d8
100 70-1301,2-Dichloroethane-d4
104 70-1304-Bromofluorobenzene
Page 19 of 25
Client Sample ID: LCS
Lab ID#: 2411391-08A
EPA METHOD TO-15 GC/MS FULL SCAN
17112304File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 11/23/24 12:17 PM
Limits%RecoveryCompound
Method
108 70-130Freon 12
100 70-130Freon 114
106 70-130Chloromethane
102 70-130Vinyl Chloride
92 70-1301,3-Butadiene
106 70-130Bromomethane
100 70-130Chloroethane
101 70-130Freon 11
83 70-130Ethanol
98 70-130Freon 113
90 70-1301,1-Dichloroethene
91 70-130Acetone
102 70-1302-Propanol
90 70-130Carbon Disulfide
90 70-1303-Chloropropene
98 70-130Methylene Chloride
94 70-130Methyl tert-butyl ether
94 70-130trans-1,2-Dichloroethene
90 70-130Hexane
93 70-1301,1-Dichloroethane
91 70-1302-Butanone (Methyl Ethyl Ketone)
92 70-130cis-1,2-Dichloroethene
92 70-130Tetrahydrofuran
95 70-130Chloroform
100 70-1301,1,1-Trichloroethane
93 70-130Cyclohexane
97 70-130Carbon Tetrachloride
99 70-1302,2,4-Trimethylpentane
101 70-130Benzene
100 70-1301,2-Dichloroethane
92 70-130Heptane
98 70-130Trichloroethene
96 70-1301,2-Dichloropropane
95 70-1301,4-Dioxane
102 70-130Bromodichloromethane
98 70-130cis-1,3-Dichloropropene
95 70-1304-Methyl-2-pentanone
96 70-130Toluene
98 70-130trans-1,3-Dichloropropene
102 70-1301,1,2-Trichloroethane
100 70-130Tetrachloroethene
98 70-1302-Hexanone
Page 20 of 25
Client Sample ID: LCS
Lab ID#: 2411391-08A
EPA METHOD TO-15 GC/MS FULL SCAN
17112304File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 11/23/24 12:17 PM
Limits%RecoveryCompound
Method
99 70-130Dibromochloromethane
103 70-1301,2-Dibromoethane (EDB)
101 70-130Chlorobenzene
99 70-130Ethyl Benzene
100 70-130m,p-Xylene
96 70-130o-Xylene
98 70-130Styrene
100 70-130Bromoform
98 70-130Cumene
103 70-1301,1,2,2-Tetrachloroethane
95 70-130Propylbenzene
100 70-1304-Ethyltoluene
98 70-1301,3,5-Trimethylbenzene
96 70-1301,2,4-Trimethylbenzene
98 70-1301,3-Dichlorobenzene
98 70-1301,4-Dichlorobenzene
98 70-130alpha-Chlorotoluene
99 70-1301,2-Dichlorobenzene
104 70-1301,2,4-Trichlorobenzene
103 70-130Hexachlorobutadiene
88 60-140Naphthalene
Container Type: NA - Not Applicable
Limits%RecoverySurrogates
Method
102 70-130Toluene-d8
99 70-1301,2-Dichloroethane-d4
100 70-1304-Bromofluorobenzene
Page 21 of 25
Client Sample ID: LCSD
Lab ID#: 2411391-08AA
EPA METHOD TO-15 GC/MS FULL SCAN
17112305File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 11/23/24 12:44 PM
Limits%RecoveryCompound
Method
110 70-130Freon 12
100 70-130Freon 114
106 70-130Chloromethane
104 70-130Vinyl Chloride
90 70-1301,3-Butadiene
107 70-130Bromomethane
102 70-130Chloroethane
101 70-130Freon 11
85 70-130Ethanol
98 70-130Freon 113
92 70-1301,1-Dichloroethene
88 70-130Acetone
102 70-1302-Propanol
92 70-130Carbon Disulfide
90 70-1303-Chloropropene
99 70-130Methylene Chloride
94 70-130Methyl tert-butyl ether
98 70-130trans-1,2-Dichloroethene
91 70-130Hexane
95 70-1301,1-Dichloroethane
96 70-1302-Butanone (Methyl Ethyl Ketone)
96 70-130cis-1,2-Dichloroethene
93 70-130Tetrahydrofuran
97 70-130Chloroform
101 70-1301,1,1-Trichloroethane
95 70-130Cyclohexane
98 70-130Carbon Tetrachloride
102 70-1302,2,4-Trimethylpentane
101 70-130Benzene
100 70-1301,2-Dichloroethane
94 70-130Heptane
97 70-130Trichloroethene
96 70-1301,2-Dichloropropane
93 70-1301,4-Dioxane
101 70-130Bromodichloromethane
96 70-130cis-1,3-Dichloropropene
96 70-1304-Methyl-2-pentanone
96 70-130Toluene
99 70-130trans-1,3-Dichloropropene
102 70-1301,1,2-Trichloroethane
99 70-130Tetrachloroethene
97 70-1302-Hexanone
Page 22 of 25
Client Sample ID: LCSD
Lab ID#: 2411391-08AA
EPA METHOD TO-15 GC/MS FULL SCAN
17112305File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 11/23/24 12:44 PM
Limits%RecoveryCompound
Method
99 70-130Dibromochloromethane
101 70-1301,2-Dibromoethane (EDB)
101 70-130Chlorobenzene
99 70-130Ethyl Benzene
98 70-130m,p-Xylene
96 70-130o-Xylene
98 70-130Styrene
99 70-130Bromoform
98 70-130Cumene
101 70-1301,1,2,2-Tetrachloroethane
92 70-130Propylbenzene
99 70-1304-Ethyltoluene
97 70-1301,3,5-Trimethylbenzene
97 70-1301,2,4-Trimethylbenzene
98 70-1301,3-Dichlorobenzene
98 70-1301,4-Dichlorobenzene
98 70-130alpha-Chlorotoluene
98 70-1301,2-Dichlorobenzene
111 70-1301,2,4-Trichlorobenzene
107 70-130Hexachlorobutadiene
101 60-140Naphthalene
Container Type: NA - Not Applicable
Limits%RecoverySurrogates
Method
102 70-130Toluene-d8
101 70-1301,2-Dichloroethane-d4
101 70-1304-Bromofluorobenzene
Page 23 of 25
Method : TO-15 + Naph
Compound Rpt. Limit (ppbv)CAS Number
0.5075-71-8 Freon 12
0.5076-14-2 Freon 114
5.074-87-3 Chloromethane
0.5075-01-4 Vinyl Chloride
0.501,3-Butadiene106-99-0
5.074-83-9 Bromomethane
2.075-00-3 Chloroethane
0.5075-69-4 Freon 11
5.064-17-5 Ethanol
0.50Freon 11376-13-1
0.5075-35-4 1,1-Dichloroethene
5.067-64-1 Acetone
2.067-63-0 2-Propanol
2.075-15-0 Carbon Disulfide
2.03-Chloropropene107-05-1
5.075-09-2 Methylene Chloride
2.01634-04-4 Methyl tert-butyl ether
0.50156-60-5 trans-1,2-Dichloroethene
0.50110-54-3 Hexane
0.501,1-Dichloroethane75-34-3
2.078-93-3 2-Butanone (Methyl Ethyl Ketone)
0.50156-59-2 cis-1,2-Dichloroethene
0.50109-99-9 Tetrahydrofuran
0.5067-66-3 Chloroform
0.501,1,1-Trichloroethane71-55-6
0.50110-82-7 Cyclohexane
0.5056-23-5 Carbon Tetrachloride
0.50540-84-1 2,2,4-Trimethylpentane
0.5071-43-2 Benzene
0.501,2-Dichloroethane107-06-2
0.50142-82-5 Heptane
0.5079-01-6 Trichloroethene
0.5078-87-5 1,2-Dichloropropane
2.0123-91-1 1,4-Dioxane
0.50Bromodichloromethane75-27-4
0.5010061-01-5 cis-1,3-Dichloropropene
0.50108-10-1 4-Methyl-2-pentanone
1.0108-88-3 Toluene
0.5010061-02-6 trans-1,3-Dichloropropene
0.501,1,2-Trichloroethane79-00-5
0.50127-18-4 Tetrachloroethene
2.0591-78-6 2-Hexanone
0.50124-48-1 Dibromochloromethane
0.50106-93-4 1,2-Dibromoethane (EDB)
Page 24 of 25
Method : TO-15 + Naph
Compound Rpt. Limit (ppbv)CAS Number
0.50108-90-7 Chlorobenzene
0.50100-41-4 Ethyl Benzene
1.0108-38-3 m,p-Xylene
0.5095-47-6 o-Xylene
0.50Styrene100-42-5
0.5075-25-2 Bromoform
0.5098-82-8 Cumene
0.5079-34-5 1,1,2,2-Tetrachloroethane
0.50103-65-1 Propylbenzene
0.504-Ethyltoluene622-96-8
0.50108-67-8 1,3,5-Trimethylbenzene
0.5095-63-6 1,2,4-Trimethylbenzene
0.50541-73-1 1,3-Dichlorobenzene
0.50106-46-7 1,4-Dichlorobenzene
0.50alpha-Chlorotoluene100-44-7
0.5095-50-1 1,2-Dichlorobenzene
2.0120-82-1 1,2,4-Trichlorobenzene
2.087-68-3 Hexachlorobutadiene
1.091-20-3 Naphthalene
Surrogate Method Limits
70-1302037-26-5 Toluene-d8
70-13017060-07-0 1,2-Dichloroethane-d4
70-130460-00-4 4-Bromofluorobenzene
Page 25 of 25