Signal Hill City Council
November 13, 2025

MEARNS CONSULTING LLC

ENVIRONMENTAL CONSULTANTS

RISK ASSESSORS
738 Ashland Avenue, Santa Monica, California90405
Cell 310.403.1921
Tel 310.396.9606 Fax310.396.6878
[email protected]
_______________________________________________________________________________________________ 1 June 23, 2025
via email
Ms. Colleen T. Doan
Community Development Manager
City of Signal Hill
2175 Cherry Avenue
Signal Hill, California 90755
RE: Memorandum – Study of Human Health Risks Due to Outdoor Air Exposure at Proposed Walnut Bluff Development, City of Signal Hill, California 90755, dated April 16, 2025 prepared by Catalyst Environmental Solutions
Dear Ms. Doan:

The Study of Human Health Risks Due to Outdoor Air Exposure at Proposed Walnut Bluff Development, City of Signal Hill, California 90755, dated April 16, 2025, prepared by Catalyst Environmental Solutions (Catalyst) was received and reviewed on April 16, 2025.

Catalyst estimated cancer risk due to exposure to benzene only and all petroleum-related chemicals of potential concern (COPCs) measured during the month of October 2024 onsite in outdoor air using acceptable regulatory agency guidance.

Catalyst excluded the benzene concentration of 3.2 micrograms per cubic meter (µg/m3) detected in October 2024 at onsite location WB05 and used Dixon’s Outlier Test to statistically demonstrate this detected concentration was an outlier. Catalyst also performed additional air sampling during December 2024 at four locations and recorded detected concentrations of benzene at 1.7 µg/m3, 1.7 µg/m3 , 1.7 µg/m3 and 1.9 µg/m3, all greater than the concentrations of benzene detected in October. Catalyst did not include these five detected concentrations of benzene in their risk estimates.

Mearns Consulting LLC (Mearns) was able to replicate Catalysts’ risk estimates. Mearns also estimated cancer risk for benzene only and all petroleum-related COPCs including the five detected concentrations of benzene: 3.2 µg/m3, 1.7 µg/m3, 1.7 µg/m3, 1.7 µg/m3 and 1.9 µg/m3 omitted by Catalyst. The results are presented below.

Benzene Cancer Risk Calculations
Scenario Benzene Cancer Risk
All Petroleum-Related COPCs
Cancer Risk
MATES V – Regional All Data 1.1 x 10-5 1.0 x 10-5
Catalyst
Walnut Bluff Offsite Samples 1.0 x 10-5 1.1 x 10-5
Catalyst
Walnut Bluff Onsite Samples 8.6 x 10-6 1.0 x 10-5
Walnut Bluff Onsite Samples
including WB05, and 4 samples
collected in December 2024 1.47 x 10-5 1.6 x 10-5
2 Ms. Colleen T. Doan, Community Development Director
Memorandum - Study of Human Health Risks Due to Outdoor Air Exposure at Proposed Walnut Bluff Devel., Signal Hill, CA June 23, 2025
The Mearns calculated risk estimate 1.47 x 10-5 for benzene and 1.6 x 10-5 for all petroleum-related COPCs includes the five data points for benzene (3.2 µg/m3, 1.7 µg/m3, 1.7 µg/m3, 1.7 µg/m3 and 1.9 µg/m3) omitted by Catalyst, is greater than the risk estimates calculated by Catalyst, is within the regulatory agency acceptable risk range of 1 x 10-4 to 1 x 10-6 and less than the SCAQMD Air Toxics Hotspots threshold of 1 x 10-4. Excluding the detected concentration of 3.2 µg/m3, that Catalyst identified as an outlier, from the benzene cancer risk calculations results in a benzene cancer risk of 1.4 x 10-5, which is not statistically different from the risk calculation 1.47 x 10-5.

The benefit of including all detected concentrations of benzene in the onsite risk calculations is a more robust risk estimation due to exposure of the outdoor concentrations of benzene detected in the 28 days samples were collected from two separate months with different conditions. The different conditions make the dataset more representative of onsite conditions to which the future site occupants will be exposed.

Comparing Onsite Results to MATES V
The dataset analyzed in the MATES V Study included 60 days of data collected over a 12 month period in 2018- 2019 to account for seasonal variability. The dataset analyzed in the Catalyst study included 14 days of data collected in October 2024 only. The differences between the MATES V Study and the Catalyst study include the duration of the data collection, the year of the data collection and the seasonal data collection. As demonstrated by the data collected by Catalyst in December 2024 with greater detected concentrations of benzene than the October dataset, seasonal variability occurs.

Mearns agrees with Catalysts’ conclusions that the onsite risk due to exposure to benzene (1.47 x 10-5) and petroleum-related COPCs (1.6 x 10-5) is comparable to the risk estimations in the MATES V Study (1 x 10-5), is less than the SCAQMD Air Toxics Hotspots threshold of 1 x 10-4, and is within the regulatory agency acceptable risk range of 1 x 10-4 to 1 x 10-6.

Please do not hesitate to contact me should you have any questions.

Sincerely,
________________________
Susan L. Mearns, Ph.D.

Mearns Consulting LLC
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Study of Human Health Risks Due
to Outdoor Air Exposure at
Proposed Walnut Bluff
Development
City of Signal Hill, California
April 16, 2025
Prepared for:

City of Signal Hill
2175 Cherry Avenue
Signal Hill, CA 90755
Prepared By:

Catalyst Environmental Solutions
315 Montana Avenue, Suite 311
Santa Monica, CA 90403
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Table of Contents i
Contents
ABSTRACT ........................................................................................................................................... vi SECTION 1 Introduction ................................................................................................................................. 1 SECTION 2 Study Design Framework .............................................................................................................. 3 SECTION 3 Field Methods .............................................................................................................................. 4

3.1 Monitoring and Sampling Locations ..............................................................................................4

3.1.1 Onsite Air Quality Monitoring and Sampling Locations...........................................................5

3.1.2 Offsite Air Quality Monitoring and Sampling Locations...........................................................6

3.1.3 2023 and 2024 Wind Directions...............................................................................................8

3.1.4 Weather Monitoring Locations................................................................................................8

3.2 Air Quality Monitoring and Sampling.............................................................................................8

3.2.1 Continuous Photo-Ionization Detection Monitoring – 14-Days...............................................9

3.2.2 Time-Integrated Sampling – 14-Days.......................................................................................9

3.2.3 Time-Integrated Sampling – 1-Hour.......................................................................................10

3.2.4 Time-Integrated Sampling – 24-Hours...................................................................................10

3.2.5 Deviations From Work Plan....................................................................................................11

3.3 Personnel and Procedures...........................................................................................................11

3.4 Site Safety.....................................................................................................................................11

3.5 Site Security and Access Control..................................................................................................12 SECTION 4 Monitoring and Sampling Results ............................................................................................... 12

4.1 Meteorological Data.....................................................................................................................12

4.2 PID Monitoring.............................................................................................................................13

4.2.1 PID Measurements versus Calendar Day ...............................................................................13

4.2.2 PID Measurements versus 24-hour Day.................................................................................14

4.3 Air Quality Samples......................................................................................................................15

4.3.1 Screening Criteria ...................................................................................................................15

4.3.2 14-Day Air Samples.................................................................................................................15

4.3.3 1-Hour Air Samples.................................................................................................................16

4.3.4 24-Hour Air Samples...............................................................................................................16

4.3.5 Comparison Of 14-Day, 24-Hour, and 1-Hour Samples..........................................................17

4.3.6 Data Quality Evaluation..........................................................................................................18

4.4 Statistical Outliers........................................................................................................................18

4.4.1 Field Methods for Outlier Evaluation in December 2024 ......................................................20

4.4.2 Findings...................................................................................................................................20

4.5 Petroleum Hydrocarbon Fingerprint............................................................................................20 SECTION 5 Assessment of Human Health Risks ............................................................................................ 21

5.1 Exposure Assessment...................................................................................................................23

5.1.1 Selection of Chemicals of Potential Concern (COPCs)............................................................23

5.1.2 Data Usability Evaluation .......................................................................................................23

5.1.3 Exposure Pathways Analysis and Development of the Conceptual Site Model (CSM)..........24

5.1.4 Exposure Point Concentrations..............................................................................................25

5.1.5 Human Exposure Factors........................................................................................................25

5.2 Toxicity Assessment.....................................................................................................................25

5.2.1 MATES V – Summary Description...........................................................................................26 Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Table of Contents ii

5.2.2 MATES V – Data Trends..........................................................................................................26

5.3 Risk Characterization....................................................................................................................27

5.3.1 Cancer Risk and Noncancer Hazard Calculations and Equations...........................................27

5.3.2 Incremental Lifetime Cancer Risks.........................................................................................28

5.3.3 Chronic Noncancer Hazards...................................................................................................29

5.3.4 Acute Noncancer Hazards......................................................................................................29

5.3.5 Comparison of Onsite, Offsite, and Regional MATES V Benzene Cancer Risks......................29

5.4 Discussion of Findings and Uncertainties.....................................................................................31 SECTION 6 Conclusions ............................................................................................................................... 32 SECTION 7 References ................................................................................................................................. 34 Tables
Table 1. Sampling Locations (in text)
Table 2. 14-Day Outdoor Air Samples
Table 3. 1-Hour Outdoor Air Samples
Table 4. 24-Hour Outdoor Air Samples
Table 5. Characterization of Potential Chronic Human Health Risks Associated with Onsite Outdoor Air Table 6. Characterization of Potential Acute Human Health Risks Associated with Onsite Outdoor Air Table 7. Characterization of Potential Chronic Human Health Risks Associated with Offsite Outdoor Air Exposure to Petroleum-Related COPCs
Table 8. Comparison of Regional and Walnut Bluff Average Outdoor Air Petroleum Hydrocarbon Concentrations
Figures
Figure 1. Site Location Map
Figure 2. Site Map with Oil and Gas Well Locations
Figure 3. Onsite Outdoor Air Sampling Plan
Figure 4. Offsite Outdoor Air Sampling Plan
Figure 5. Human Health Risk Assessment Conceptual Site Model Charts
Chart 1. WB01 PID Measurements vs Sampling Periods
Chart 2. WB02 PID Measurements vs Sampling Periods
Chart 3. WB03 PID Measurements vs Sampling Periods
Chart 4. WB04 PID Measurements vs Sampling Periods
Chart 5. WB05 PID Measurements vs Sampling Periods
Chart 6. WB06 PID Measurements vs Sampling Periods
Chart 7. WB07 PID Measurements vs Sampling Periods
Chart 8. WB08 PID Measurements vs Sampling Periods
Chart 9. WB09 PID Measurements vs Sampling Periods
Chart 10. WB10 PID Measurements vs Sampling Periods
Chart 11. WB11 PID Measurements vs Sampling Periods
Chart 12. WB12 PID Measurements vs Sampling Periods
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Table of Contents iii
Chart 13. WB13 PID Measurements vs Sampling Periods
Chart 14. WB14 PID Measurements vs Sampling Periods
Chart 15. WB17 PID Measurements vs Sampling Periods
Chart 16. WB18 PID Measurements vs Sampling Periods
Chart 17. WB19 PID Measurements vs Sampling Periods
Chart 18. PID Measurements vs 24 Hour Day
Chart 19. PID Measurements vs 24 Hour Day – Arranged by Pattern Chart 20. Benzene Concentrations in 1 Hour, 24 Hours, and 2 Week Samples Chart 21. Toluene Concentrations in 1 Hour, 24 Hours, and 2 Week Samples Chart 22. Ethylbenzene Concentrations in 1 Hour, 24 Hours, and 2 Week Samples Chart 23. Total Xylenes Concentrations in 1 Hour, 24 Hours, and 2 Week Samples Chart 24. Naphthalene Concentrations in 1 Hour, 24 Hours, and 2 Week Samples Chart 25. 1,2,4-trimethylbenzene and 1,3,5-trimethylbenzene in 2 Week Samples Chart 26. Petroleum Fingerprints
Chart 27. WB15 Windrose Diagram
Chart 28. WB16 Windrose Diagram
Chart 29. WB17 Windrose Diagram
Chart 30. WB15 Windspeed, Temperature, and Barometric Pressure Chart 31. WB16 Windspeed, Temperature, and Barometric Pressure Chart 32. WB17 Windspeed, Temperature, and Barometric Pressure Chart 33. Comparison of Regional vs Walnut Bluff Benzene Cancer Risk Using MATES Risk Assessment Methodology (Average Concentration)– 1998 to 2024
Chart 34. Comparison of Regional vs Walnut Bluff Toluene Noncancer Hazard Index Using MATES Risk Assessment Methodology (Average Concentration) – 1998 to 2024 Chart 35. Comparison of Regional vs Walnut Bluff Ethylbenzene Cancer Risk Using MATES Risk Assessment Methodology (Average Concentration) – 1998 to 2024
Chart 36. Comparison of Regional vs Walnut Bluff Total Xylenes Noncancer Hazard Index Using MATES Risk Assessment Methodology (Average Concentration) – 1998 to 2024 Chart 37. Comparison of Regional vs Walnut Bluff Naphthalene Cancer Risk Using MATES Risk Assessment Methodology (Average Concentration) – 1998 to 2024
Chart 38. 14 Day Benzene Concentrations
Chart 39. 14 Day Toluene Concentrations
Chart 40. 14 Day Ethylbenzene Concentrations
Chart 41. 14 Day Xylene Concentrations
Chart 42. 14 Day Naphthalene Concentrations
Chart 43. Benzene Concentrations in 2 Week Samples in October 2024 and December 2024 Chart 44. Toluene Concentrations in 2 Week Samples in October 2024 and December 2024 Chart 45. Ethylbenzene Concentrations in 2 Week Samples in October 2024 and December 2024 Chart 46. Total Xylenes Concentrations in 2 Week Samples in October 2024 and December 2024 Chart 47. Naphthalene Concentrations in 2 Week Samples in October 2024 and December 2024 Chart 48. 1,2,4-trimethylbenzene and 1,3,5-trimethylbenzene in 2 Week Samples in Oct and Dec 2024 Chart 49. WB16 Windrose Diagram (December 2024)
Chart 50. WB16 Windspeed (December 2024)
Chart 51. Average Concentration of Benzene Over Time By Sample Station (MATES V Data 2018-2019) Chart 52. Comparison of Benzene Concentrations Detected at Walnut Bluff and MATES V Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Table of Contents iv
Appendices
Appendix A. Field Data Sheets
Appendix B. Quality Assurance Evaluation of Laboratory Data Appendix C. Dixon’s Outlier Test for Benzene and Toluene Appendix D. HHRA ProUCL outputs and Outlier Calculations Appendix E. Laboratory Analytical Reports – 14-day samples – October and December Appendix F. Laboratory Analytical Reports – 24-hour samples Appendix G. Laboratory Analytical Reports – 1-hour samples Appendix H. PID Calibration Certificates
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Table of Contents v

GLOSSARY
AQMD South Coast Air Quality Management District
ATSDR Agency for Toxic Substances and Disease Registry
BTEX benzene, toluene, ethylbenzene, total xylenes
Comparable used herein to mean similar in quality and quantity COPC chemical of potential concern
CSM Conceptual Site Model
CVOCs chlorinated volatile organic compounds
DTSC California Department of Toxic Substances Control
EPC Exposure Point Concentration
HHRA Human Health Risk Assessment
HI Hazard Index
HQ Hazard Quotient
ILCR individual incremental lifetime cancer risk
MATES V Multiple Air Toxics Exposure Study V
OEHHA California’s Office of Environmental Health Hazard Assessment Offsite Monitoring and sampling locations studied herein not located on the Site labelled WB17, WB18, labelled WB19
Onsite Walnut Bluff property, including monitoring and sampling locations WB01 through WB16 PCE Tetrachloroethene
PID Photo-ionization detector
ppbv parts per billion by volume
Region / Regional Air quality and associated risks documented in the MATES V Study Report Study of Human Health Risks Due to Exposure to Outdoor Air [at the] Proposed Walnut Bluff Development
REL Reference Exposure Level
RL reporting limit
RME Reasonable Maximum Exposure
RSL Regional Screening Levels
AEGL Acute Exposure Guideline Level
USDOE United States Department of Energy
AGV acute Air Guidance Values
SCAQMD South Coast Air Quality Management District
SHP Signal Hill Petroleum
Site Walnut Bluff property
SL screening level
µg/m3 micrograms per cubic meter, also known as parts per billion by mass UCL upper confidence level
USEPA United States Environmental Protection Agency
VOCs Volatile Organic Compounds
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Abstract vi

ABSTRACT
On behalf of the City of Signal Hill (City), Catalyst Environmental Solutions Corporation (Catalyst) evaluated the quality of, and potential risks to human health posed by, outdoor air at an approximately 2-acre property located at the corner of Willow Street and Walnut Avenue in the City of Signal Hill, Los Angeles County, California (Site).

This Site is currently owned by Signal Hill Petroleum (SHP). The quality of outdoor air was characterized by 14- day, 1-day, and 1 hour time integrated samples collected between October 1 and October 15, 2024 and by 4 onsite 14-day samples collected in December 2024. The samples were collected from 14 locations distributed across the Site and from 3 nearby properties also owned by SHP. The samples were analyzed by a California certified laboratory method TO-15sim to provide measurable concentrations of volatile organic compounds (VOCs). The results indicate that the 14-day analytical results and risks based on the onsite samples and offsite samples are comparable to the risks presented in the South Coast Air Quality Management District’s Multiple Air Toxics Exposure Study V (MATES V) performed for the broader Los Angeles basin in 2018 and 2019. In summary, the onsite air quality measured in October 2024 poses no additional measurable risk to human health compared with offsite and regional conditions, and the outdoor air quality measured at the Site is comparable to regional air quality conditions characterized by the MATES V study.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Introduction 1
SECTION 1
Introduction
On behalf of the City of Signal Hill (City), Catalyst Environmental Solutions Corporation (Catalyst) prepared this Study of Human Health Risks Due to Exposure to Outdoor Air at the Proposed Walnut Bluff Development (Report) located at the corner of Willow Street and Walnut Avenue in the City of Signal Hill, Los Angeles County, California (Site; Figure 1). The overall purpose of this Report is to present the findings from the assessment of human health risks posed by volatile organic compounds (VOCs) detected in outdoor air samples collected at the Site between October 1 and October 15, 2024.

The Site consists of an approximately two-acre parcel that is currently owned by Signal Hill Petroleum (SHP) and is used for oil extraction with eight wells onsite, consisting of four abandoned wells, two idle wells, and two active wells (Figure 2). The City plans to support redevelopment of this property that will include an apartment building and separate recreational building.

Prior to redevelopment, we understand that SHP has plans to remove relic infrastructure and remediate the parcel to standards that support residential land use. In addition, development of the Site will require engineering controls (e.g., methane mitigation system) to be installed sub-slab of all proposed buildings to mitigate risks and hazards due to the potential for volatile organic compounds (VOCs) and methane vapor intrusion from the subsurface.

Because two of the wells on the Site will remain active for oil and gas production following development, the City commissioned the Work Plan for Human Health Risk Assessment (Catalyst 2024) to evaluate the potential human health risks posed by outdoor air to future residents and recreational users of the Site. The objective was to collect site-specific outdoor air data to support an assessment of potential human health risks posed by VOCs in outdoor air.

The scope of work involved: 1) reviewing existing air quality data documented in the Multiple Air Toxics Exposure Study V (MATES V) for the Los Angeles basin as provided by the South Coast Air Quality Management District (SCAQMD) ; 2) collecting air quality data to characterize outdoor air quality on and adjacent to the Site; and 3) analyzing the collected data to prepare a site-specific assessment of potential human health risks. The investigation was conducted in accordance with the most current methods recommended by the California Department of Toxic Substances Control (DTSC), California’s Office of Environmental Health Hazard Assessment (OEHHA), and the U.S. Environmental Protection Agency (USEPA). This report documents the methods and results of the study and assessment of potential human health risks.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Introduction 2
Figure 1. Site Location Map (Source: Mearns Consulting, LLC 2021) Site Location Map
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Study Design Framework 3
Figure 2. Site Map with Oil and Gas Well Locations (Source: SHP, 2021) SECTION 2
Study Design Framework
The Work Plan for Human Health Risk Assessment, consisting of an air quality monitoring and sampling plan, was developed to characterize air quality at the Site and its vicinity and to generate the data required to support an assessment of potential human health risks. More specifically, the study was designed to generate data to enable evaluations of:
• Air quality impacts from VOCs (if measurable) associated with each of the onsite active and idle wells • Concentrations of VOCs in outdoor air at the Site
• Effects (if any) of wind direction, temperature, and barometric pressure on outdoor air quality • Cumulative cancer risk and chronic and acute noncancer hazards posed by potential exposure to outdoor air at the Site.

The Study Design was based on these two key assumptions:
• Onsite active, idle, and previously abandoned oil and gas wells are potential sources of measurable concentrations of VOCs to outdoor air
• Outdoor air in the vicinity of the Site, including air upwind from the Site and in the Los Angeles region contain measurable concentrations of VOCs.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Field Methods 4
Catalyst also required the following support during the implementation of the Study:
• Routine SHP operations would continue without regard nor alteration due to the study • Security would be installed to ensure that all monitoring equipment would be protected and not subjected to tampering.
 We note that security consisted of temporary chain-link fencing installed around the entire Site and 24-hour video surveillance. No trespassing nor tampering of the monitoring equipment was observed.

SECTION 3
Field Methods
The study consisted of real-time monitoring of outdoor air quality, collection of outdoor air samples, and measurement of meteorological parameters. All data were collected during October 1 through October 15, 2024 at the locations shown on Figures 3 and 4. This section describes the means and methods employed to collect these data.

3.1 Monitoring and Sampling Locations
Monitoring and sampling were performed over a 14-day period at 16 onsite and 3 offsite locations. At each location (onsite, offsite, and meteorological), the sampling and monitoring devices were deployed vertically within the breathing zone, approximately 3 to 5 feet above ground surface. As discussed in Section 3.1.3, the dominant wind direction in September 2023 and September 2024 was primarily from the southwest/west-southwest with a subdominant direction from the west-northwest; this wind direction informed some of the location-selection rationale provided in Table 1. Table 1 below provides the rationale for each sampling and monitoring location.

Table 1. Sampling Locations
Site ID Onsite/Offsite Location Description and Rationale WB1 Onsite Located upwind and crosswind from one of the wells (API #03708973) that will remain active
WB2 Onsite Located at one of the wells that will remain active (API #03708973) WB3 Onsite Located upwind and crosswind of one of the wells (API #03708973) that will remain active and along the western property margin
WB4 Onsite Located upwind and crosswind on the property, and just west of the proposed residential building in the northern portion of the Site WB5 Onsite Located within the footprint of the proposed residential building WB6 Onsite
Located in the center of the proposed residential building in the northern portion of the Site, and along the upwind margin of the property for wind towards the southeast
WB7 Onsite Located within the footprint of the proposed residential building Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Field Methods 5
Site ID Onsite/Offsite Location Description and Rationale WB8 Onsite
Located along the east side of the proposed residential building in the northern portion of the Site, and along the downwind margin of the property for wind towards the southeast
WB9 Onsite Located at the middle eastern side of the property and largely along the downwind side of the property
WB10 Onsite Located at one of the wells that will remain active in the center of the Site (API #03708971)
WB11 Onsite Located at an idle well that is proposed for abandonment (API #03708975) WB12 Onsite Located at an idle well that is proposed for abandonment (API #03708972) WB13 Onsite Located in the center of the proposed recreational building in the southern portion of the Site
WB14 Onsite Located at the western side of the proposed recreational building WB15 Onsite Weather station in the southwest quadrant of the Site WB16 Onsite Weather station in the northeast quadrant of the Site WB17 Offsite Located offsite, upwind and/or crosswind at a nearby SHP facility WB18 Offsite Located offsite, upwind and/or crosswind near the 405 freeway at SHP Drill Site #1 located at 805 East Spring Street
WB19 Offsite Located offsite, upwind and/or crosswind at the SHP Town Center Northwest site

3.1.1 Onsite Air Quality Monitoring and Sampling Locations Air quality monitoring and sampling was performed at 14 onsite sampling locations (WB1 through WB14) and weather monitoring was performed at 2 onsite locations (WB15, WB16), as shown in Figure 3. The onsite sampling locations were selected to characterize outdoor air quality in the vicinity of:
• two active wells
• two idle wells
• area within the footprint of the proposed residential apartment building • area within the footprint of the proposed recreational building • along the upwind, crosswind and downwind margins of the property • offsite areas upwind, crosswind, and downwind of the property.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Field Methods 6
Figure 3. Onsite Sampling Plan

3.1.2 Offsite Air Quality Monitoring and Sampling Locations Air quality monitoring and sampling were performed at three offsite study locations (WB17 through WB19) as shown in Figure 4. The three offsite sampling locations were selected to characterize outdoor air quality at similar SHP facilities upwind or crosswind from the Site. SHP provided access to the three offsite locations.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Field Methods 7
Figure 4. Offsite Sampling Plan
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Field Methods 8

3.1.3 2023 and 2024 Wind Directions
Wind direction and speed are important phenomena to consider when evaluating air quality in an outdoor environment. The leftmost wind rose below is for the period between September 12, 2023 and September 11, 2024 measured at the SHP facility located at 1215 E 29th Street in the City of Signal Hill, which is approximately

0.35-miles northwest of the Site (provided by SHP). This wind rose indicates that the dominant wind direction at that time was primarily from the southwest/west-southwest with a subdominant direction from the westnorthwest (see adjacent figure). Similarly, SHP provided the center and rightmost wind roses at other nearby facilities in the City, which show similar dominant and sub-dominant wind directions in the months of September 2023 and October 2023. It was assumed that the dominant and subdominant wind directions at the Site were similar to these wind roses and would remain similar during the time of the study.

3.1.4 Weather Monitoring Locations
Monitoring of meteorological conditions was performed at three locations. Two locations (WB15, WB16) were located onsite, and one location (WB17) was located offsite. At each location, a Lufft WS600 meteorological monitoring station was installed and maintained to measure and record every 15 minutes throughout the study period: wind direction, wind speed, air temperature, and absolute air pressure (aka, barometric pressure). Refer to Section 4.1 for the measurements of actual wind direction and wind speed during this study.

3.2 Air Quality Monitoring and Sampling
This task involved the collection of outdoor air quality data to characterize both onsite and offsite conditions. Over a period of 14 continuous days, the monitoring and sampling program involved the following collection of continuous and concurrent data as well as time-integrated air quality samples at each of the locations shown on Figures 3 and 4, as follows:
• Continuous measurements of total concentrations of VOCs using a photo-ionization detector meter (PID) for 14 days
• 14-day time integrated air samples
• 24-hour time integrated air samples
• 1-hour time integrated air samples
• Continuous measurements of meteorological parameters.

Field data sheets are provided in Appendix A.

Sep 2023 – Sep 2023 Oct 2023
Sep 2024
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Field Methods 9

3.2.1 Continuous Photo-Ionization Detection Monitoring – 14-Days Air quality was monitored continuously at the 14 onsite sample locations and the 3 offsite sample locations using PIDs configured to measure in parts per billion by volume (ppbv, or ppb) and record the total concentration of VOCs every 15-seconds. The data were evaluated to identify:
• Changes in VOC concentrations over time at each monitoring location • Correlations (if any) between VOC concentrations, time, wind speed and direction, and barometric pressure • Overall range of total VOC concentrations in air
• Diurnal variation in the concentration of total VOCs at each of the monitoring locations. The diurnal distribution of relatively higher and lower concentrations was used to identify the optimal time interval(s) during a 24-hour period to collect 1-hour air samples for laboratory analysis that will likely yield the highest daily VOC concentrations in outdoor air, as described below.

The PID meters were supplied by Field Environmental Instruments (FEI), located in Signal Hill. Prior to deployment, the PIDs were calibrated by FEI following the manufacturer’s instructions. Calibration certificates are provided in Appendix H. The PIDs deployed at the Site were the ppbRAE 3000 or multiRAE Pro manufactured by Rae Systems in San Jose, California. All PIDs were secured onto a rigid tripod, measured VOCs at 4 to 5 feet above grade, and were powered by a dedicated battery.

3.2.2 Time-Integrated Sampling – 14-Days
Six-liter Summa canisters were deployed on October 1, 2024 at each location also containing a PID to collect 14- day time-integrated samples over the duration of the study. Enthalpy Analytical in Orange, California, a State of California certified laboratory, provided Summa canisters and 14-day flow controllers, and analyzed the Summa canisters for VOCs using USEPA Method TO-15sim. Charts 1 through 17 depict the PID measurements and the 14- day sampling interval at all sampling locations.

Each 6-liter Summa sample canister was fitted with a vacuum gauge and a flow controller to collect the sample over an approximately 14-day period. Each canister, flow controller, and gauge was individually certified clean by the analytical laboratory. After the canisters were set in the breathing zone in their respective locations, the initial vacuum reading was recorded on field forms. Canisters were confirmed to be at a minimum vacuum of 27-inches of mercury prior to use. After 14 days, the valve on the Summa canister was closed and the final vacuum was ppbRAE ppbRAE & Tripod ppbRAE, Tripod, & battery
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Field Methods 10
measured and recorded. Each canister waslabeled appropriately, and a chain-of-custody manifest was completed onsite to accompany the samples to the lab.

The following items were recorded for each sample:
• Sample location (including figure and photographs)
• Canister and flow regulator identification numbers
• Initial vacuum
• Time and date that sample collection began and ended
• Final vacuum.

3.2.3 Time-Integrated Sampling – 1-Hour
The PID measurements recorded during the first six days at each monitoring location were evaluated to identify the daylight hour when the highest PID measurements were typically recorded. For safety reasons, collection of the 1-hour air sample was limited to daylight hours. Table 3 summarizes the 1-hour sampling timeframe selected for each location. Charts 1 through 17 depict the PID measurements and the 1-hour sampling interval at all sampling locations.

The six-liter summa canisters were deployed on October 9, 2024 in a similar manner to the 14-day samples. Pace Analytical, a State of California certified laboratory, supplied the Summa canisters and flow controllers, and analyzed the air samples for VOCs by USEPA Method TO-15sim.

3.2.4 Time-Integrated Sampling – 24-Hours
The PID measurements recorded during the first six days at each monitoring location were evaluated to identify the day of the week that corresponded with relatively higher measurements of VOCs compared to other days.

However, the PID data yielded no indication that any particular day of the week corresponded with relatively higher concentrations than any other day. Therefore, the 6-liter Summa canisters for collecting a 24-hour air sample were deployed at each sampling location on October 10, 2024, the day following the collection of the 1- ppbRAE & Summa Canister ppbRAE & Summa near well ppbRAE, Summa, & Met Station ppbRAE & 2 Summa Canisters
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Field Methods 11
hour air sample. Charts 1 through 17 depict the PID measurements and the 24-hour sampling intervals at all sampling locations.

The six-liter Summa canisters were deployed on October 10, 2024 in a similar manner to the 14-day samples. Pace Analytical, a State of California certified laboratory, supplied the Summa canisters and flow controllers, and analyzed the air samples for VOCs by USEPA Method TO-15sim.

3.2.5 Deviations From Work Plan
Location WB07 was sampled for 1 hour. However, the summa canister arrived at the laboratory fully evacuated and could not be analyzed. Because the study generated data from 13 other locations on the Site, the lack of a 1- hour sample at this location is considered to be an insignificant deviation and does not materially affect the results and conclusions presented herein.

All offsite outdoor air sampling locations were adjusted to locations shown in Figure 4 as follows:
• WB17 was changed because the County Assessor’s office did not provide access for this study. • WB18 was changed to avoid conflict with oil and gas well infrastructure. • WB19 was changed to avoid conflict with oil and gas well infrastructure.

The above changes are slight and considered immaterial to the overall findings in this study.

Following publication of the Work Plan, feedback from Dr. Susan Mearns (City consultant) and the City as well as discussions with SHP (property owner) and National Core (potential buyer) resulted in modifying the scope of work to remove overt monitoring and sampling at the abandoned wells. Instead, the study evaluated outdoor air quality throughout the Site, which includes the area containing the previously abandoned wells, but did not overtly measure outdoor air quality at each of the abandoned well locations. Because the study generated multiple samples from 14 locations across the Site, and because samples purposefully collected adjacent to active and idle wells did not yield concentrations significantly different from samples collected further away from these wells (as discussed herein below), the lack of samples deployed precisely above abandoned well locations is considered to not materially affect the results and conclusions presented herein.

3.3 Personnel and Procedures
All environmental work was performed by qualified Catalyst environmental personnel who supervised the field activities and oversaw all phases of the work including managing subcontractors. All field procedures (e.g., permitting, sampling protocol, chain-of-custody, preparation of a Health and Safety Plan, etc.) followed City of Signal Hill, Los Angeles County, and State of California guidelines, as well as Catalyst’s Standard Operating Procedures.

3.4 Site Safety
A site-specific Health, Safety, and Environmental Plan (HSE) was developed in accordance with the California Occupational Safety and Health Administration (Cal-OSHA) guidelines for Hazardous Waste Operations Standards (Title 29 CFR, Section 1910.120) and California Code of Regulations (Title 8 CCR, Section 5192). The HSE Plan provided field personnel with an understanding of the potential chemical and physical hazards, protection of any offsite receptors, procedures for entering the Site, health and safety procedures, and emergency response to Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Monitoring and Sampling Results 12
hazards should they occur. In addition, the HSE Plan addressed the appropriate level of Personal Protective Equipment (PPE) for onsite workers during activities at the Site. A copy of the HSE was present onsite at all times and kept in an easily accessible location.

3.5 Site Security and Access Control
Because the scope of work involved the use of various air quality monitoring and sampling equipment on a continuous basis, site security measures were implemented to protect the safety of site workers and integrity of the study, prevent unauthorized access to the Site, and reduce risk of equipment damage, theft, and vandalism. The security measures used included: 1) installation of temporary fencing with locking gates around the perimeter of the Site and offsite monitoring locations where no permanent fencing existed; 2) installation of video cameras and remote monitoring; 3) deployment of security lighting; and, 4) where feasible, equipment was set back a minimum of 20 feet from property lines to ensure public safety and the safety of the equipment.

SECTION 4
Monitoring and Sampling Results
This section presents the data resulting from the monitoring and sampling scope described in Section 3.

4.1 Meteorological Data
Section 3.1.4 presents the wind directions recorded near the Site from September 2023 through September 2024, and in the months of September and October 2023, which showed the dominant wind direction was primarily from the southwest/west-southwest with a subdominant direction from the west. During this October 2024 study, the meteorological stations (WB15, WB16, and WB17) measured and recorded wind direction, temperature, and barometric pressure. Charts 27 through 29 present wind direction and wind speed on a wind rose. Charts 30 to 32 present wind speed, temperature, and barometric pressure. The data show that temperature and barometric pressure fluctuated within the normal and anticipated range for the season and therefore, are interpreted to have not materially affected the representativeness of the results presented herein.

As shown below, the dominant west-northwest wind direction measured at the onsite locations WB15 and WB16 and the dominant south-southeast offsite location WB17 differed from the dominant west-southwest 2023 direction. However, the subdominant wind direction from the west recorded in 2023 matches reasonably well with the onsite dominant wind direction from the west and west-northwest. Charts 30 through 32 present the histograms of the wind speed measured from October 1 through October 15, 2024.

As discussed in detail in Section 5, because the offsite, onsite, and regional concentrations and risks are comparable, the inconsistency between the anticipated and actual wind directions is considered immaterial to the conclusion drawn in this report.

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4.2 PID Monitoring
Measurements of total VOC concentrations were recorded every approximately 15 seconds at each of the 14 onsite (WB01 - WB14) and 3 offsite (WB17 - WB19) monitoring stations. These data are presented graphically in two forms utilizing two different X-axes.

4.2.1 PID Measurements versus Calendar Day
Charts 1 through 17 present the PID
measurements with the x-axis structured
chronologically by day. The y-axis for the
charts for all locations was selected to display
the data that represents measurements of air
quality.

An example chart, with PID measurements at
WB01, is provided here. The charts are color
coded to show the following:
• Green depicts the entire duration of the
14-day time integrated air sample
• Blue depicts the entire duration of the 24-
hour air sample
• Red depicts the entire duration of the 1-
hour air sample.

It is noted that because bump test events were performed during the monitoring period, the data collected at each location also include concentrations considerably higher than those actually present in outdoor air . The bump tests involved briefly exposing the PID sensor to 10ppm of isobutylene gas to evaluate if the PID reads the concentration as expected. An appropriate PID response confirms the detector reliably measures VOCs. Bump tests were performed by FEI and field notes were not recorded. If the y-axis was adjusted to include the bump WB15 WB16 WB17
Wind Speed
mph
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Monitoring and Sampling Results 14
test events, then the diurnal patterns would be too subtle to observe. It is also noted that to avoid graphically calling unnecessary attention to the bump test events, the PID data are plotted as points, rather than lines connecting each data point.

4.2.2 PID Measurements versus 24-hour Day
Most of the locations yielded PID data that show diurnal variations over time. It is postulated that these diurnal fluctuations are associated with both anthropogenic factors, such as vehicle traffic patterns, and meteorological patterns, such as changes in wind direction. The potential significance of the relatively higher PID measurement revealed within the diurnal fluctuations was evaluated via the collection of 1-hour outdoor air samples as discussed in Section 4.3.3. Understanding the causes of these diurnal patterns is beyond the scope of this study and the causes are considered to be immaterial to the risk assessment objectives of this study.

Nonetheless, in an attempt to gain some further insight into these diurnal patterns, the same PID data were plotted with the X-axis structured as a 24-hour day. Chart 18 presents these PID measurements with the charts ordered sequentially by monitoring location. Chart 19 is organized to show locations with similar diurnal patterns.

The y-axis for the charts for all locations was selected to display the data that represents measurements of air quality, excluding bump test events.

For example, PID measurements at WB01 show a diurnal pattern with low total VOC concentrations routinely recorded by the PID between 2pm and 6pm. Other locations with a similar pattern are WB07, WB13, WB14, and WB19.

A different pattern emerges with PID measurements at WB06, which shows a diurnal pattern with slightly lower concentrations routinely recorded around 12pm, slightly higher concentrations recorded around 2pm to 6pm, followed by a rapid decline at about 7pm. Other locations with a similar pattern are WB03, WB05, WB08, WB09, and WB10.

PID measurements at WB12 show a diurnal pattern with marked rise in total VOC concentrations routinely recorded in the afternoon. One other location with this pattern is the offsite location WB17.

There are also locations that yielded PID concentrations with either no discernable pattern or a pattern that was not replicated at other monitoring locations. For example, the WB18 location.

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It is also noted that PID data recorded at WB04 produced total VOC concentrations considerably lower than all other locations. Similarly, PID data recorded at WB11 also produced mainly very low total VOC concentrations.

Repeated bump tests of the PID at these locations were performed and the ppbRAE demonstrated proper function. The relatively unusual PID data recorded at these locations cannot be explained. Regardless, as shown below, the air quality samples collected at WB04 and WB11 reveal total VOC concentrations similar in magnitude to those collected throughout the study.

4.3 Air Quality Samples

4.3.1 Screening Criteria
The analytical data tables compare the measured concentrations with the following chronic screening criteria:
• DTSC (2022a) HHRA Note 3 residential air screening levels for carcinogenic risks (SLc) • DTSC (2022a) HHRA Note 3 residential air screening levels for noncarcinogenic hazard (SLnc) • USEPA (2024) Regional Screening Levels for residential air carcinogenic risk (RSLc) • USEPA (2024) Regional Screening Levels for residential air noncarcinogenic hazard (RSLnc).

It is important to note that not all detected VOCs have DTSC SLs, not all detected VOCs have USEPA RSLs, and that some detected VOCs have neither or both.

4.3.2 14-Day Air Samples
Laboratory analytical results for these samples are summarized in Table 2. Laboratory analytical reports are presented in Appendix E. These data are used in Section 5 to evaluate human health chronic cancer risks and noncancer hazards. The following summarizes those VOCs that exceed chronic screening levels. • Petroleum-related VOCs
 Benzene ranged narrowly at the onsite and offsite locations from 0.72 µg/m3 to 0.99 µg/m3 , and as
discussed below there is an outlier concentration of 3.2 µg/m3 at WB05. Concentrations at all onsite and offsite locations exceeded both the SLc and RSLc.

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 Naphthalene ranged onsite from below the reporting limit of 0.052 µg/m3 to 0.14 µg/m3, and ranged offsite from below the reporting limit of 0.058 µg/m3 to 0.073 µg/m3 . Naphthalene exceeded the RSLc
at three locations, WB10, WB11, and WB13.
• Nonpetroleum-related VOCs
 Carbon tetrachloride ranged narrowly at the onsite and offsite locations from 0.45 µg/m3 to 0.47 µg/m3
. There are six onsite locations and one offsite location that equaled the SLc and RSLc of 0.47 µg/m3
.
 Chloroform ranged narrowly at the onsite and offsite locations from 0.13 µg/m3 to 0.17 µg/m3 .

Concentrations at all onsite and offsite locations exceeded the RSLc.

4.3.3 1-Hour Air Samples
Laboratory analytical results for these samples are summarized in Table 3. Laboratory analytical reports are presented in Appendix G. These data are used in Section 5 to evaluate human health acute noncancer hazards.

The following summarizes those VOCs that exceed chronic screening levels. It is important to note that because chronic screening levels are considerably lower than acute screening levels, the comparison of chronic screening levels to the 1-hour VOC concentrations provides a very conservative list of VOCs that might pose a risk and hazard. Acute noncancer hazards are appropriately assessed in Section 5. • Petroleum-related VOCs
 Benzene ranged narrowly at the onsite and offsite locations from 0.88 µg/m3 to 1.9 µg/m3 .

Concentrations at all onsite and offsite locations exceeded both the SLc and RSLc.  Naphthalene narrowly ranged at the onsite and offsite locations from 0.13 µg/m3 to 0.38 µg/m3 .

Concentrations at all onsite and offsite locations exceeded the RSLc. • Nonpetroleum-related VOCs
 Carbon tetrachloride ranged narrowly at the onsite and offsite locations from 0.49 µg/m3 to 0.51 µg/m3. Concentrations at all onsite and offsite locations exceeded both the SLc and RSLc.  Chloroform ranged narrowly at the onsite and offsite locations from 0.19 µg/m3 to 0.27 µg/m3 .

Concentrations at all onsite and offsite locations exceeded the RSLc.  1,2 Dichloroethane exceeded the RSLc at three onsite locations and one offsite location. All exceedances were reported at 0.11 µg/m3
.

4.3.4 24-Hour Air Samples
Laboratory analytical results for these samples are summarized in Table 4. Laboratory analytical reports are presented in Appendix F. These data are not used in Section 5 to evaluate chronic human health risks because the 14-day samples better represent the average concentration to which a receptor might be exposed. But, because longer term time-integrated 14-day samples run a greater risk of disturbance (e.g., physical, meteorological) to sample integrity, these 24-hour samples are used herein to evaluate if the 14-day samples reasonably represent site conditions over the longer term. The following summarizes those VOCs that exceed chronic screening levels. • Petroleum-related VOCs
 Benzene ranged narrowly at the onsite and offsite locations from 0.68 µg/m3 to 1.1 µg/m3 . The high
concentration of 1.1 µg/m3 was reported at the onsite location WB10 and the offsite location WB19.

Concentrations at all onsite and offsite locations exceeded both the SLc and RSLc.

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Monitoring and Sampling Results 17
 Naphthalene narrowly ranged at the onsite and offsite locations from 0.13 µg/m3 to 0.43 µg/m3.

Concentrations at all onsite and offsite locations exceeded the RSLc. • Nonpetroleum-related VOCs
 Carbon tetrachloride ranged narrowly at the onsite and offsite locations from 0.46 µg/m3 to 0.50 µg/m3
. Concentrations at all but one onsite location and all offsite locations exceeded both the SLc and RSLc of 0.47 µg/m3
.
 Chloroform ranged narrowly at the onsite and offsite locations from 0.14 µg/m3 to 0.17 µg/m3 .

Concentrations at all onsite and offsite locations exceeded the RSLc.

Overall, the 1-day samples yielded concentrations reasonably comparable to the 14-day sample concentrations suggests that concentrations are relatively consistent each day throughout this 14 day monitoring period.

4.3.5 Comparison Of 14-Day, 24-Hour, and 1-Hour Samples Charts 20 through 24 compare the concentrations of petroleum-related VOCs measured in the 14-day, 24-hour, and 1-hour samples. Chart 25 compares the concentrations of 1,2,4-trimenthylbenzene and 1,3,5- trimethylbenzene in 14-day samples, these two VOCs were not analyzed in the 1-hour and 24-hour samples.

In nearly all cases, the highest concentrations were detected in the 1-hour samples and the lowest concentrations were measured in the 14-day samples. This distribution validatesthe overall intent of the sampling strategy, which was to capture the long-term average concentration in the 14-day samples and the likely higher concentrations (based on PID data) in the 1-hour samples. It is noted that, again in most cases, the concentrations measured in the 24-hour and 14-day samples are quite comparable. This comparison indicates that daily average concentrations do not vary significantly over longer, in this case 2-week, time horizons. An example comparison chart is provided below for benzene, which includes the outlier concentration at WB05 as discussed below in Section 4.4.

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Monitoring and Sampling Results 18

4.3.6 Data Quality Evaluation
The laboratory analytical reports and field sampling sheets were evaluated to identify potential issues that could impact the quality and/or representativeness of the samples and data reported by the laboratory. The Laboratory Data Review Checklist for the Air Samples was completed and the analytical data returned by Pace Analytical and Enthalpy Analytical, are provided in Appendix B. No significant quality control issues were identified. Therefore, the data are considered reliable and reasonably representative of Site conditions.

4.4 Statistical Outliers
Two statistical outliers were identified in the 14-day sample dataset, one for benzene and one for toluene, both at WB05. Onsite outdoor air benzene concentrationsin the 14-day samples ranged from 0.72 to 3.2 µg/m3 . Dixon’s
Outlier Test identifies the benzene concentration of 3.2 µg/m3 in the WB05 sample as a statistically significant outlier at p=0.01 (Appendix C). Similarly, onsite outdoor air toluene concentrations in the 14-day samples ranged from 1.2 to 5.8 µg/m3
. Dixon’s Outlier Test identifies toluene concentration of 5.8 µg/m3 in the WB05 sample as a statistically significant outlier based at p=0.01 (Appendix C).

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Monitoring and Sampling Results 19
A “p” value of 0.01 means that the test has a
99% chance that the results were not due to
chance and the outlier designation is
statistically significant. Furthermore, it is
reasonable to conclude that benzene and
toluene in the 14-day sample at WB05 are
unlikely to be representative of outdoor air
quality at that location because:
• 1-hour samples collected when the PID
revealed relatively higher concentrations
of VOCs during the day did not contain
relatively higher concentrations of
benzene nor toluene compared to other 1-
hour samples,
• WB05 is not located adjacent to an oil well,
and because samples located adjacent to
active and idle wells did not yield relatively
higher concentrations of benzene and
toluene,
• Concentrations at locations that are
crosswind, upwind, and downwind (WB04,
WB06, WB03, WB10, WB07) to WB05
show no corresponding effects indicating
the absence of any similarly elevated
concentrations coming onsite towards
WB05 or elevated concentrations
downwind from WB05, it is reasonable to
conclude that benzene and toluene in the
14-day sample at WB05 are unlikely to be
representative of outdoor air quality at
that locationWB05.

Therefore, the benzene and toluene concentrations in the 14-day sample at WB05 are not utilized herein to evaluate chronic risks posed by outdoor air at the Site. Exclusion of the outliers in the calculation of risks is consistent with USEPA 2002 and USEPA 2000.

Excluding the outlier, onsite outdoor air benzene concentrations ranged from 0.72 to 0.99 µg/m3 . This rather tight
range is slightly less than the offsite outdoor air benzene concentrations, which ranged from 0.79 to 1.0 µg/m3 .

Excluding the toluene outlier, onsite outdoor air toluene concentrations ranged from 1.2 to 2 µg/m3 . This rather
tight range is slightly higher than the offsite outdoor air toluene concentrations, which ranged from 1.7 to 1.8 µg/m3
. As discussed further below, this range in concentrations is comparable to those reported in MATES V.

A graphic depiction of the WB05 benzene and toluene outlier are shown above. Nonetheless, in order to further evaluate the benzene and toluene outliers at WB05, a second round of 14-day sampling occurred in December 2024 at 4 sampling locations as described below.

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4.4.1 Field Methods for Outlier Evaluation in December 2024 From December 2 to December 16, 2024, six-liter Summa canisters were utilized at 4 locations (WB02, WB03, WB05, and WB10) to collect 14-day time-integrated samples. Enthalpy Analytical in Orange, California, a State of California certified laboratory, provided Summa canisters and 14-day flow controllers, and analyzed the Summa canisters for VOCs using USEPA Method TO-15sim. In addition, monitoring of meteorological conditions was performed at WB16 with a Lufft WS600 meteorological monitoring station that was set to record the following every 15 minutes throughout the study period: wind direction, wind speed, air temperature, and absolute air pressure (aka, barometric pressure).

Each 6-liter Summa sample canister was fitted with a vacuum gauge and a flow controller to collect the sample over an approximately 14-day period. Each canister, flow controller, and gauge was individually certified clean by the analytical laboratory. After the canisters were set in the breathing zone in their respective locations, the initial vacuum reading was recorded on field forms. Canisters were confirmed to be at a minimum vacuum of 27-inches of mercury prior to use. After 14 days, the valve on the Summa canister was closed and the final vacuum was measured and recorded. Each canister waslabeled appropriately, and a chain-of-custody manifest was completed onsite to accompany the samples to the lab.

The following items were recorded for each sample:
• Sample location (including figure and photographs)
• Canister and flow regulator identification numbers
• Initial vacuum
• Time and date that sample collection began and ended
• Final vacuum.

4.4.2 Findings
Charts 43 through 48 compare concentrations from October and December 2024 of benzene, toluene, ethylbenzene, xylenes, naphthalene, 1,2,4-trimethylbenzene and 1,3,5-trimethylbenzene. As shown, individual VOC concentrations in December were relatively similar to each other across the four samples including benzene and toluene concentrations. Benzene concentrations ranged from 1.7 to 1.9 µg/m3 and toluene concentrations ranged from 3.2 to 3.4 µg/m3
.

The overall December concentrations are higher than those measured in October, excluding the outliers benzene and toluene at WB05. These results support the conclusion that the concentrations of benzene and toluene measured at WB05 in October were outliers and not representative of outdoor air quality at the WB05 sampling location. These results also indicate that variability in concentrations month over month exists at the Site.

The windrose from WB16 in December 2024 is provided in Chart 49. The dominant wind direction measured (easterly) differed from the October 2024 direction. Chart 50 presents the histogram of the wind speed measured from December 2 to December 16, 2024.

4.5 Petroleum Hydrocarbon Fingerprint
The primary focus of this study is on petroleum-related VOCs and on chlorinated solvents that reportedly might have been a component of some products used during periodic servicing and maintenance of the onsite oil and gas extraction wells. Nevertheless, all VOCs detected in 1-hour, 24-hour, and 14-day samples and are evaluated herein and in the assessment of potential human health risks.

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Petroleum related VOCs were routinely measured in all 14-day, 24-hour, and 1-hour air samples: benzene, toluene, ethylbenzene, total xylenes (collectively referred to as BTEX), naphthalene, 1,2,4- trimethylbenzene, and 1,3,5 -trimethylbenzene..

The 14-day samples collected in October 2024 revealed just one onsite location, WB13 at 0.08 µg/m3 , with a
measurable concentration of the chlorinated VOC (CVOC) tetrachloroethene (PCE). None of the 24-hour samples contained measurable CVOCs. Four of the fourteen onsite 1-hour samples contained measurable PCE with an average concentration of 0.11 ug/m3
. For comparison, the average PCE concentration in all MATES V regional data is 0.20 µg/m3 and the average PCE concentration at the MATES V Long Beach location was 0.22 µg/m3 , both above
all onsite measurements of PCE.

To evaluate if the distribution of these seven petroleum-related VOCs varied or remained similar regardless of sampling location, the normalized concentrations (as percent of total) of these seven petroleum-related VOCs are plotted and compared. These plots can be considered as fingerprints that graphically depict relative concentrations. Chart 26 displays the fingerprints at all 14 onsite and 3 offsite locations sampled in October 2024, and MATES V all regional data, October 2018 data, and Long Beach October 2018 data. The fingerprints were inspected to identify:
• Obvious differences among the fingerprints in pattern, which would be indicative of source(s) at one or more locations that would alter the fingerprint relative to other locations. • Obvious similarities among the fingerprints in pattern, which could be indicative of similar conditions at each of the locations, such as being dominated by regional air quality conditions.

The three fingerprints depicted here are from WB01, located at the southwest corner upwind from the Site and near the road, at WB02 adjacent to an active oil production well, and the most distant offsite location WB19 that is in a parking lot and more distant from adjacent active roads. The onsite and offsite fingerprints show similar patterns. Comparing the MATES fingerprint with the onsite fingerprints shows they are comparable.

SECTION 5
Assessment of Human Health Risks
The objective of this assessment of potential human health risks is to evaluate potential human health risks associated with outdoor air quality and future residential land use of the property, which includes a residential apartment building and a Boys & Girls Club recreational facility. As discussed above, the two oil production wells Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Assessment of Human Health Risks 22
that were operating during this study will remain active on the property following development. It is important to note here that this assessment of potential human health risks and the findings and conclusions herein are limited to conditions represented by the samples collected during 2 weeks in October 2024.

Because oil and gas operations are the only known historical and current uses of the Site, it would be reasonable to focus this assessment of potential human health risks on VOCs related to petroleum and servicing of the oil production wells, the latter of which reportedly might include CVOCs. Nonetheless, this assessment of potential human health risks provides a full assessment of all detected VOCs in onsite outdoor air.

As discussed above, outdoor air samples were collected at receptor height from 14 locations across the property in October to provide a reasonable estimate of outdoor air exposures to VOC concentrations. Specifically, continuous 14-day air samples and peak 1-hour air samples were collected for the purpose of assessing potential onsite cancer risks and chronic noncancer hazards and onsite acute noncancer hazards, respectively.

It is noted that the air sampling described herein occurred prior to anticipated remediation of elevated VOC concentrations in soil gas, which have been separately investigated and reported to be present at elevated concentrations in the southeastern portion of the Site (Mearns Consulting, 2021). Consequently, it remains possible that following remediation, the outdoor air quality at the Site might improve.

The assessment of potential human health risks provides upper-bound estimates of individual incremental lifetime cancer risk (ILCR)1 and noncancer hazard for the theoretical Reasonable Maximum Exposure (RME) for adult and child receptors based on exposures to VOCs in outdoor air. The RME approach utilized herein is consistent with DTSC (2015, 2022a,b) and USEPA (1989) human health risk assessment guidance and is a conservative measure that overestimates potential risks USEPA (1989), thus ensuring the protection of public health, including sensitive subpopulations.

The assessment of potential human health risks was conducted following standardized risk assessment methods consistent with DTSC and USEPA risk assessment guidance, including, but not limited to, the following guidance documents, as applicable:
• USEPA. 1987. The Risk Assessment Guidelines of 1986
• USEPA. 1989. Risk Assessment Guidance for Superfund, Volume I, Health Evaluation Manual, Part A • USEPA. 2009. Risk Assessment Guidance for Superfund Volume I: Human Health Evaluation Manual (Part F, Supplemental Guidance for Inhalation Risk Assessment)
• USEPA. 2011. Exposure Factors Handbook: 2011 Edition
• USEPA. 2014. Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors
• DTSC. 2015. Preliminary Endanger Assessment Guidance Manual • DTSC. 2018. California Toxicity Criteria Rule
• USEPA. 2019. Guidelines for Human Exposure Assessment • DTSC. 2019. Human Health Risk Assessment (HHRA) Note Number 1: Recommended DTSC Default Exposure Factors for Use in Risk Assessment at California Hazardous Waste Sites and Permitted Facilities • DTSC. 2022a. Human Health Risk Assessment (HHRA) Note Number 3, DTSC-modified Screening Levels (DTSCSLs) • DTSC. 2022b. Human Health Risk Assessment (HHRA) Note Number 4: Guidance for Screening Level Human Health Risk Assessments
1 Throughout this report “ILCR” and “cancer risk” have the same meaning and are used interchangeably.

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• USEPA (2024) Regional Screening Levels (RSLs). November.

Consistent with DTSC and USEPA risk assessment guidelines, the assessment of potential human health risks is organized as follows:
• Exposure Assessment
• Toxicity Assessment
• Risk Characterization.

5.1 Exposure Assessment
Exposure Assessment is the process of quantitatively characterizing exposure concentrations and potential human intake (e.g., dose). Exposure assessment results are subsequently integrated with toxicity information from the Toxicity Assessment (Section 5.2) into the Risk Characterization (Section 5.3) to assess potential health risks.

The Exposure Assessment comprises the following components:
• Selection of chemicals of potential concern (COPCs)
• Data useability evaluation for risk assessment
• Identification of human receptors
• Exposure pathways analysis and development of a Conceptual Site Model (CSM) • Derivation of Exposure Point Concentrations (EPCs)
• Summarize human exposure factors.

5.1.1 Selection of Chemicals of Potential Concern (COPCs) For this assessment of potential human health risks, any VOC detected in at least one onsite 14-day outdoor air sample or in at least one onsite 1-hour outdoor air sample was selected as a COPC. The TO-15sim analytical method applied to the 14-day outdoor air samples comprised 48 VOCs, of which 21 VOCs were detected in at least one sample of outdoor air. The TO-15sim analytical method applied to the 1-hour air samples comprised 30 VOCs, of which 16 VOCs were detected in at least one sample.

For the 14-day air samples, in total, 7 petroleum-related VOCs were detected and selected as COPCs, and 14 nonpetroleum-related VOCs were detected and selected as COPCs. The 7 petroleum-related VOCs are benzene, toluene, ethylbenzene, total xylenes, naphthalene, 1,2,4-trimethylbenzene, and 1,3,5-trimethylbenzene. For the 1-hour air samples, in total, 7 petroleum-related VOCs were detected and selected as COPCs, and 9 nonpetroleum-related VOCs were detected and selected as COPCs.

5.1.2 Data Usability Evaluation
The purpose of the data useability evaluation is to ensure that the analytical data collected and used for the assessment of potential human exposure are of sufficient quality with respect to sample size and analytical detection limits. As detailed below, both the number of samples (sample size) and data quality are sufficient for the assessment of potential human health risks.

For the chronic 14-day outdoor air sample data set, a total of 14 onsite samples were collected, which is a sufficient sample size for calculating EPCs (USEPA 2022). All petroleum-related VOCs selected as COPCs were detected in each of the 14 onsite samples with the exception of naphthalene which was detected in 10 of 14 samples. The Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Assessment of Human Health Risks 24
maximum reporting limit (RL) for naphthalene of 0.058 µg/m3 is lower than the lowest DTSC (2022a) residential air screening level (SL) of 0.083 µg/m3
. Therefore, it is concluded that sample size and detection limits for onsite COPCs are sufficient for assessing chronic exposures in the assessment of potential human health risks.

For VOCs not selected as COPCs (e.g., not detected in any sample), RLs were lower than screening levels for all VOCs with the exception of 1,1,2,2-tetrachloroethane, 1,2-dibromoethane, benzyl chloride, bromodichloromethane, and vinyl chloride for which RLs exceeded either DTSC (2022a) SLs or USEPA (2024) RSLs.

However, since these VOCs were never detected in any 1-hour, 24-hour, or 14-day onsite outdoor air sample it is reasonable to conclude that these VOCs were not present at detectable concentrations in outdoor air at the Site in October 2024.

For the acute 1-hour outdoor air sample data set, a total of 13 onsite samples were collected, which is a sufficient sample size for calculating EPCs (USEPA 2022). In contrast to the 14 14-day onsite air samples discussed above, there are only 13 1-hour air samples as the WB07 Summa cannister was depressurized when received by the analytical laboratory, and therefore, did not contain an air sample. The cause is unknown. In addition, the analytical laboratory used for the acute 1-hour samples does not report results for 1,2,4-trimethylbenzene or 1,3,5- trimethylbenzene. For VOCs not selected as COPCs (e.g., not detected in any sample), all RLs were lower than available screening levels. The one missing sample and the absence of 1-hour sample results for 1,2,4- trimethylbenzene or 1,3,5-trimethylbenzene are expected to not impact the outcome of the assessment of potential human health risks.

5.1.3 Exposure Pathways Analysis and Development of the Conceptual Site Model (CSM) The ultimate goal of the Exposure Pathways Analysis is to identify those potential exposure pathways to outdoor air that would be considered complete exposure pathways for the quantitative assessment of potential human health risks based on future land use, identification of future human receptors, identification of sources of contamination and receiving media, chemical fate and transport in receiving media, and identification of exposure points and exposure routes (USEPA 1989).

Based on the planned future land use of the property (residential), the following exposure pathways are anticipated to become present:
• The human receptors expected to be present on the property following future development are residential adults and children as well as adults and children using the planned Boys & Girls Club. • Sources of potential contamination to outdoor air following development are expected to be the two active and two idle oil and gas wells whereby VOCs may be released to the outdoor air during continuous operation and periodic servicing of these wells. In addition, residual VOCs in subsurface soils (e.g., soil gas) following remediation may also be released to the outdoor air.
• The primary chemical fate and transport process is dispersion within outdoor air of such potential emissions, if any, which would cause concentrations to reduce with increased distance from the point of release. • Human exposure points for short term acute exposure (i.e. 1 hour) may be any discreet location on the property and would be represented by the maximum detected concentration of each identified COPC. • Human exposure points for long term chronic exposure may be all accessible locations on the property and would be represented by the 95% upper confidence limit on the mean (95% UCL) concentration of each identified COPC across the Site.

The Exposure Pathways Analysis is summarized in the Conceptual Site Model (CSM) presented in Figure 5.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Assessment of Human Health Risks 25

5.1.4 Exposure Point Concentrations
Consistent with DTSC (2015) and USEPA (1989) risk assessment guidance, EPCs for chronic exposures are estimated as the site-wide 95% UCL 14-day outdoor air concentration for each COPC as measured at all 14 onsite locations. 95% UCLs are estimated herein using USEPA (2022) ProUCL ver. 5.2 software. Exceptions for benzene and toluene are the exclusion of the benzene outlier of 3.2 µg/m3 and the toluene outlier of 5.8 µg/m3 , both
measured at WB05, from the 95% UCL calculations. As discussed in Section 4.4 both outliers are considered to be not representative of Site conditions.

EPCs for acute exposures are the maximum 1-hour maximum outdoor air concentration for each COPC measured at any one of the 14 onsite sample locations. The chronic 14-day EPCs and the acute 1-hour maximum EPCs for each COPCs are summarized in the risk characterization tables presented in the Risk Characterization section. The ProUCL outputs are presented in Appendix D.

5.1.5 Human Exposure Factors
The human exposure factors applicable to the inhalation exposure pathway for adults and children are those embedded within the DTSC (2022a) SLs, which are consistent with the residential human exposure factors recommended by DTSC (2019) exposure factor guidelines and consistent with those embedded within the USEPA (2024) RSLs. The key chronic residential exposure factors are exposure time of 24 hours/day, exposure frequency of 350 days/year, and exposure duration of 20 years for adults and 6 years for children. For acute exposures the only applicable exposure factor is the exposure time of 1 hour.

5.2 Toxicity Assessment
Toxicity Assessment is the process of assessing the relationship between human intake of a chemical (e.g., dose) and the corresponding toxic response. This process is also known as dose-response assessment. The results of the dose-response assessment are generally referred to as toxicity values. Over the past 30 years, dose-response assessments have been routinely performed by State and Federal regulatory agencies that publish toxicity values for various types of health effects and exposure pathways.

Consistent with the approach used in this assessment of potential human health risks for the Exposure Assessment, the chronic noncancer- and cancer-based toxicity values used are embedded within the DTSC (2022a) SLs and USEPA (2024) RSLs. Preferentially using DTSC (2022a) SLs and secondarily USEPA (2024) RSLs ensures compliance with the DTSC (2018) Toxicity Criteria Rule.

For assessing 1-hour acute exposures, acute toxicity values were obtained from multiple sources when available.

The preferred source of acute toxicity values is OEHHA’s acute Reference Exposure Levels (RELs). For COPCs without OEHHA acute RELs, the USEPA’s Acute Exposure Guideline Levels (AEGLs; USEPA 2019) are the next preferred source, and in the absence of either acute RELs or AEGLs, then the U.S. Department of Energy (USDOE) Protective Action Criteria (PAC; USDOE 2018) are selected as acute toxicity values. For two COPCs (naphthalene and tetrachloroethene) acute toxicity values were not available from any of these sources but were available from the Minnesota Department of Health as acute Air Guidance Values (AGVs).

As with the exposure parameters described above in Section 5.1.3, the toxicity values described in this Section are also presented in the risk characterization tables in Section 5.3.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Assessment of Human Health Risks 26

5.2.1 MATES V – Summary Description
To date, the SCAQMD has evaluated and reported regional air quality in the Los Angeles basin in five separate studies, entitled Multiple Air Toxics Exposure Study (MATES). The four most recent MATES studies occurred during 1998-1999 (MATES II), 2005 (MATES III), 2012-2013 (MATES IV), and 2018-2019 (MATES V). The most recent study, MATES V, was performed between May 2018 and April 2019 and consisted of monitoring air quality at ten different locations by collecting a total of 528 samples, consisting of approximately 50 to 60 samples per location.

The nearest MATES V sampling location is the Long Beach monitoring location, at 1710 East 20th Street in Signal Hill, 1 mile south of Walnut Bluff.

Unlike conventional risk assessments, which utilize the 95% UCL to estimate risks, MATES V assessed risk by using the average concentrations. It is recognized that the MATES V study and findings predate the study reported herein by 6 years. Another important difference is that the MATES V study collected samples approximately every 6 weeks over the course of 12 months. In contrast, this Report presents results and calculates risk based on a single sampling event covering two weeks in October 2024.

Nonetheless, the MATES V study is considered herein to be the most comprehensive and relevant assessment of risk posed by outdoor air quality to human health in the region. Therefore, the findings from the MATES V study are used here to compare with the findings from this study and to evaluate if potential additional human health risks are posed to human health by outdoor air at the Site.

5.2.2 MATES V – Data Trends
As described above, samples of outdoor air at
the Site were collected in October and
December 2024. The concentrations of VOCs
measured in December were generally higher
than concentrations measured in October.

The adjacent Chart 51 shows the average
MATES V benzene concentration by
monitoring station and the region along with
the average benzene concentration measured
at the Site. The chart shows that the Site data
are comparable with the trends revealed in
the MATES V data.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Assessment of Human Health Risks 27
To further assess these trends, the adjacent
Chart 52 shows the maximum, average, and
minimum concentrations of benzene
measured at the nearby MATES V Long Beach
station, the regional MATES V data, and Site
data. Similar to the preceding chart, the
maximum, average, and minimum
concentrations measured at the Site are also
comparable with, and in some cases slightly
lower than, the MATES V data.

Taken together, these charts indicate that the
increase trend in on-Site concentrations
measured in December are comparable to
increase trends revealed in the MATES V data.

5.3 Risk Characterization
Risk Characterization is the process of integrating exposure and toxicity information to characterize potential health risks. Under this process, chronic cancer risks are estimated for individual carcinogens, and the total risk from all carcinogens combined, referred to as the cumulative cancer risk, is then calculated by summing the cancer risks for all carcinogenic COPCs.

A similar process is employed for chronic and acute noncancer hazards whereby chronic and acute noncancer hazards are estimated for individual COPCs, referred to as Hazard Quotients (HQs), and cumulative noncancer hazard, referred to as the Hazard Index (HI), is then calculated by summing the individual chronic and acute noncancer HQs, respectively.

5.3.1 Cancer Risk and Noncancer Hazard Calculations and Equations The equations used to calculate cancer risk, chronic HQs, and acute HQs are as follows:

ILCR = EPCc / SLc x 1x10-6
Where,
ILCR = Incremental Lifetime Cancer Risk (unitless)
EPCc = chronic EPC
defined herein as the 95% UCL air concentration (µg/m3
) based on 14-day continuous
onsite air monitoring data
SLc = cancer-based screening level (µg/m3
)
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Assessment of Human Health Risks 28
Chronic HQ = EPCc / SLnc
Where,
Chronic HQ = Chronic Hazard Quotient (unitless)
EPCc = chronic EPC
defined herein as the 95% UCL air concentration (µg/m3
) based on 14-day continuous
onsite air monitoring data
SLnc = noncancer-based screening level (µg/m3
)
Acute HQ = EPCa / AREL
Where,
Acute HQ = Acute Hazard Quotient (unitless)
EPCa = acute EPC
defined herein as the maximum 1-hour air concentration (µg/m3 )
AREL = Acute Reference Exposure Level (µg/m3
)
Cumulative cancer, non-cancer hazard, and acute risks:

Cumulative ILCR = Σ ILCR for individual carcinogenic COPCs Chronic HI = Σ chronic HQs for individual COPCs
Acute HI = Σ acute HQs for individual COPCs
Potential cancer risks, chronic noncancer hazards and acute noncancer hazards associated with measured onsite outdoor air VOC concentrations are presented in Tables 5 and 6, respectively, and summarized below. Potential cancer risks and chronic noncancer hazards associated with measured offsite outdoor air VOC concentrations are presented in Table 7 and summarized below. For perspective and transparency, risk assessment findings are presented separately for petroleum-related COPCs, non-petroleum-related COPCs, and all COPCs combined.

While the standard default comparison threshold for cancer risk is 1x10-6 (ATSDR 2024) and DTSC, the USEPA (1994) National Contingency Plan (NCP) defines the range of acceptable cancer risks as 1x10-6 to 1x10-4 . However,
the NCP explains that the point of departure for screening risks is 1x10-6 , such that regulatory approval of risks up
to 1x10-4 requires a Site-specific risk assessment or some other technically defensible justification, such as background or regional conditions. Falling within this range isthe SCAQMD Air Toxics Hotspots threshold of 1x10-4 ,
which also characterizes the regional risks posed by outdoor air quality as reported in MATES V (SCAQMD, 2021).

5.3.2 Incremental Lifetime Cancer Risks
For individual petroleum-related COPCs, estimated onsite cancer risks ranged from 2.8x10-7 to 8.6x10-6. Benzene, with an ILCR of 8.6x10-6
, is the only petroleum-related COPC exceeding the default cancer risk threshold of 1x10-6 (Table 5). The onsite cumulative cancer risk for petroleum-related COPCs was 1.0x10-5 , which exceeds the default
cancer risk threshold of 1x10-6
, but is less than the SCAAQMD Air Toxics Hotspots threshold of 1x10-4. As described further below, this level of risk from outdoor onsite air is comparable to the regional risks in the MATES V study.

In the absence of benzene, the onsite cumulative risk associated with petroleum-related COPCs is 1.3x10-6 . This
clearly demonstrates that benzene is the only significant driver of petroleum-related VOCs. This discussion is also focused on benzene because benzene is the one petroleum-related “risk driver” COPC measured in both onsite outdoor air samples, offsite outdoor air samples, and the MATES regional monitoring studies.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Assessment of Human Health Risks 29
For individual non-petroleum-related COPCs, estimated cancer risks ranged from 1.7x10-7 to 2.3x10-6. The nonpetroleum-related COPCs exceeding the default cancer risk threshold of 1x10-6 were trichlorofluoromethane with an ILCR of 2.3x10-6
, chloroform with an ILCR of 1.3x10-6, and methylene chloride with an ILCR of 1.1x10-6. The cumulative cancer risk for non-petroleum-related COPCs was 5.9x10-6 .

The cumulative cancer risk for all COPCs, petroleum-related hydrocarbons and non-petroleum-related hydrocarbons, combined was 1.6x10-5
.

5.3.3 Chronic Noncancer Hazards
For individual petroleum-related COPCs, chronic noncancer HQs ranged from 3.1x10-4 for ethylbenzene to

0.27x10-1 for benzene all below the target chronic noncancer HQ of 1 (Table 5). The cumulative chronic noncancer HI for petroleum-related COPCs was 3.2x10-1
, well below the target chronic noncancer HI of 1.

For individual non-petroleum-related COPCs, chronic noncancer HQs ranged from 1.4x10-5 for chloroethane to

5.3x10-1 for trichlorofluoromethane all below the target chronic noncancer HQ of 1. The cumulative chronic noncancer HI for non-petroleum-related COPCs was 0.67, well below the target chronic noncancer HI of 1.

The cumulative noncancer HI for all COPCs, petroleum-related hydrocarbons and non-petroleum-related hydrocarbons, combined was 0.99, equivalent to the target chronic noncancer HI of 1.

5.3.4 Acute Noncancer Hazards
For individual petroleum-related COPCs, acute noncancer HQs ranged from 5.7x10-6 for ethylbenzene to 7.0x10-2 for benzene, all below the target acute noncancer HQ of 1 (Table 6). The cumulative acute noncancer HI for petroleum-related COPCs was 7.4x10-2
, well below the target acute noncancer HI of 1.

For individual non-petroleum-related COPCs, acute noncancer HQs ranged from 5.5x10-7 for 1,2-dichloroethane to 1.8x10-3 for chloroform all below the target acute noncancer HQ of 1. The cumulative acute noncancer HI for non-petroleum-related COPCs was 2.1x10-3
, well below the target acute noncancer HI of 1.

The cumulative noncancer HI for all COPCs, petroleum-related hydrocarbons and non-petroleum-related hydrocarbons, combined was 0.076, also well below the target acute noncancer HI of 1.

5.3.5 Comparison of Onsite, Offsite, and Regional MATES V Benzene Cancer Risks The focus of this discussion is on benzene because benzene is the “driver” for onsite petroleum-related COPC cancer risks of 1.0x10-5
, which exceeds the 1x10-6 default cancer risk threshold (Table 5).

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Assessment of Human Health Risks 30
Charts 33 through 37 compare the estimated
cancer risk posed by benzene, toluene,
ethylbenzene, total xylenes, and naphthalene
onsite and offsite with risk provided in MATES
II, II, III, IV, and V for the region and at the Long
Beach location. The chart for benzene, is
provided here.

As shown in these Charts and in Table 8,
regional outdoor air benzene concentrations
and corresponding cancer risk estimates
decreased over time from 1998-1999 to 2005 to
2012-2013 to 2018-2019, respectively, and
corresponding cancer risk estimates from

4.2x10-5 to 1.7x10-5 to 1.1x10-5 to 1.1x10-5
,
respectively.

It is important to note here that the MATES studies calculate cancer risk using average concentration, whereas USEPA and DTSC require the calculation of estimated risk to be based on the 95% UCL. However, for comparison purposes only, Charts 33 through 37 present risk based on average concentrations at the Site Walnut Bluff.

By definition, the arithmetic average concentration is always less than the 95% UCL (USEPA 2022). Therefore, the risks calculated using the 95% UCL of the Walnut Bluff study data should be considered more conservative than cancers risk based on MATES average concentrations. And by extension, comparisons of cancer risks between this study and the MATES data are also conservative. Were this study to assess cancer risk using the arithmetic average (an approach that does not comport with DTSC nor USEPA protocol), then this assessment of potential human health risks would conclude cancer risks lower than presented, and likely lower than the regional cancer risks presented in MATES V.

The most recent regional monitoring cancer risk estimates associated with 95% UCL benzene is comparable to the offsite outdoor air cancer risk estimates (1.0x10-5
) or the onsite outdoor air cancer risk estimate (8.6x10-6).

A more granular version of the above information depicts concentrations measured at each onsite and offsite Walnut Bluff sampling location with MATES V regional and Long Beach data are provided in Charts 38 through 42.

Collectively, these data show that overall concentrations, and by extension risks and hazards, measured in this Walnut Bluff study are also comparable to the MATES V study.

For the purpose of comparing onsite and offsite cancer risk estimates, cancer risks for petroleum-related COPCs were also calculated for the offsite sampling locations. Since there were only 3 offsite sampling locations, there was an insufficient sample size for calculating a 95% UCL. As such, cancer risk estimates for offsite outdoor air samples were conservatively based on the maximum detected concentrations. Calculations presented in Table 7 show that the cumulative cancer risk associated with petroleum-related COPCs in offsite outdoor air is 1.1x10-5 ,
approximately the same asthe cumulative cancer risk associated with petroleum-related COPCs in onsite outdoor air of 1.0x10-5
.

Scenario
Benzene
Cancer Risk
All Petroleum-Related
COPCs Cancer Risk
MATES V – Regional All Data 1.1E-05 1.0E-05
Walnut Bluff Offsite Samples 1.0E-05 1.1E-05
Walnut Bluff Onsite Samples 8.6E-06 1.0E-05
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Assessment of Human Health Risks 31

5.4 Discussion of Findings and Uncertainties
The Walnut Bluff outdoor air sampling study was specifically designed to collect appropriate data for assessing potential acute and chronic human exposures, specifically maximum 1-hour concentrations of VOCs and continuous 14-day concentrations of VOCs, respectively. Although any VOC detected in any sample was selected as a COPC, the focus of the assessment of potential human health risks is on current and historical land use (e.g., operation of oil and gas wells). As such, individual COPC and cumulative acute hazards, chronic hazards, and cancer risks are presented in prior sections for petroleum-related COPCs and non-petroleum-related COPCs.

For petroleum-related and non-petroleum COPCs combined, all individual acute HQs and cumulative acute HIs are well below the target HQ and HI of 1.0. All individual chronic HQs as well as petroleum-related and non-petroleumrelated cumulative chronic HIs are also below the target HQ and HI of 1.0. The chronic HI for petroleum-related and non-petroleum-related COPCs combined is 0.99, slightly less than the target HI of 1.

The default cancer risk threshold of 1x10-6 for petroleum-related COPCs, non-petroleum related VOCs, and all COPCs is exceeded in the onsite 14-day outdoor air samples, the offsite 14-day outdoor samples, and also the MATES V study. The range of cumulative petroleum-related cancer risks is relatively small, from 1.0x10-5 to

1.5x10-5
. The onsite, offsite, and regional (MATES V) benzene concentrations and corresponding cancer risk estimates from all VOCs are comparable.

As noted above in Section 5.2.1, there are important differences between the MATES V study and this Walnut Bluff study. Nonetheless, the MATES V study is considered to be the most comprehensive and relevant assessment of risk posed by outdoor air quality in the region and is used herein to compare with the findings from this study and assessment of potential human health risks posed by outdoor air at the Site.

Although uncertainty is inherent to the risk assessment process, the decisions made in the risk assessment process are biased towards the protection of human health. The key areas of uncertainty generally include (1) exposure assumptions, (2) toxicity data extrapolations, and (3) risk calculations based on the 95% UCL and not the arithmetic average. It is generally recognized that these uncertainties result in the over-estimation of health risk, thus ensuring the protection of human health.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Conclusions 32
SECTION 6
Conclusions
The following key conclusions are based on the findings presented above:
• In summary, the onsite air quality measured in October 2024 poses no additional measurable risk to human health compared with offsite and regional conditions, and the outdoor air quality measured at the Site is comparable to regional air quality conditions characterized by the MATES V study. • The study was implemented as designed and the few minor deviations are considered to have not materially affected the data nor the findings.
• The 14-day analytical results and risks based on the onsite samples and offsite samples are comparable to the risks presented in the MATES V regional data.
• The concentrations of petroleum-related hydrocarbons measured in the onsite 14-day samples collected in October 2024 and MATES V samples collected between May 2018 and April 2019 are comparable. • The onsite cumulative cancer risk for petroleum-related COPCs was 1.0x10-5 , which exceeds the default cancer
risk threshold of 1x10-6
, but is less than the SCAAQMD Air Toxics Hotspots threshold of 1x10-4. This level of risk from outdoor onsite air is comparable to the regional risks in the MATES V study. • Concentrations in the 1-hour samples typically exceed concentrations measured in the 14-day samples. This means that the 1-hour sampling interval identified based on the PID data accurately identified the daytime period associated with higher concentrations. The assessment of potential human health risks demonstrates that the higher concentrations measured in the 1-hour samples do not pose an acute noncancer hazard. • Benzene and toluene in the October 14-day air sample collected at WB05 are statistical outliers. The source of these concentrations is unknown, but based on the entirety of the data, they are considered unrepresentative of onsite conditions.
 A second deployment of 14-day sampling occurred in December 2024 at 4 sampling locations including WB05. The individual VOC concentrations, including benzene and toluene, measured in the 4 December samples were relatively similar. Therefore, the December data provide further indication that the concentrations of benzene and toluene measured at WB05 in October were merely outliers and not indicative of a source at the sampling location. Consequently, it is appropriate to exclude the outliers from the estimates of onsite risk.
• The concentrations of petroleum hydrocarbons measured in the 14 onsite 14-day samples and 3 offsite 14-day samples are similar, which indicates that onsite risks and offsite risks are similar. It is important to recognize that the land use of both the onsite and offsite are similar and consist of SHP properties with active oil and gas operations.
• The increase in on-Site concentrations measured from October to December are comparable to monthly increases revealed in the MATES V data.
• The Final MATES V report documents a decrease of 40% in cumulative cancer risk from MATES IV. However, the Final MATES V report also shows that between MATES IV and MATES V, benzene concentrations reduced Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
Conclusions 33
by only 10% indicating that the 30% of the decrease in cumulative cancer risk between MATES IV and MATES V was due largely to the decrease in carcinogenic VOCs unrelated to petroleum. Therefore, assuming no significant changes to petroleum-related hydrocarbons in the regional air quality has occurred since the MATES V study was performed (which could be evaluated by others once the pending Mates VI study is published), it is reasonable to conclude that the Site not a significant source of additional:
 measurable concentrations of petroleum-related hydrocarbons  measurable cumulative cancer risk due to petroleum-related hydrocarbons  acute noncancer hazard due to petroleum-related hydrocarbons.  cumulative chronic noncancer hazard due to petroleum-related hydrocarbons. • It is important to note here that this assessment of potential human health risks is based solely on samples collected at the Site during 2 weeks in October 2024. The onsite data collected in October and December 2024 reveal seasonal variability at the Site that is comparable to the MATES V data.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
References 34
SECTION 7
References
ATSDR. 2024. Public Health Assessment Guidance Manual (PHAGM). Agency for Toxic Substances and Disease Registry.

Catalyst. 2024. Workplan for Human Health Risk Assessment Proposed Walnut Bluff Development.

DTSC. 2015. Preliminary Endanger Assessment Guidance Manual. Department of Toxic Substances Control.

October.

DTSC. 2018. Toxicity Criteria Rule. September 4. Department of Toxic Substances Control. 22 CA ADC § 68400.5.

DTSC. 2019. Human Health Risk Assessment (HHRA) Note Number 1: Recommended DTSC Default Exposure Factors for Use in Risk Assessment at California Hazardous Waste Sites and Permitted Facilities. Department of Toxic Substances Control. April 9.

DTSC. 2022a. Human Health Risk Assessment (HHRA) Note Number 3, DTSC-modified Screening Levels (DTSC-SLs).

Department of Toxic Substances Control. May.

DTSC. 2022b. Human Health Risk Assessment (HHRA) Note Number 4: Guidance for Screening Level Human Health Risk Assessments. Department of Toxic Substances Control. March 29.

Mearns Consulting. 2021. Human Health Risk Assessment, Northwest Corner E. Willow St. and Walnut Avenue, Walnut Bluff, Signal Hill, California. Mearns Consulting LLC. June 16.

SCAQMD. 2021. Multiple Air Toxics Exposure Study V (MATES V). South Coast Air Quality Management District.

August.

USEPA. 1994. National Oil and Hazardous Substances Pollution Contingency Plan (NCP). CFR40 Chapter I Subchapter J Part 300.

USEPA. 1998. Linear Low dose Extrapolation for Cancer Risk Assessments: Sources of Uncertainty and How They Affect the Precision of Risk Estimates. Scientific Advisory Panel (SAP) Meeting. July.

USEPA. 1989. Risk Assessment Guidance for Superfund, Volume I, Health Evaluation Manual, Part A. U.S.

Environmental Protection Agency, Office of Emergency and Remedial Response. December.

USEPA. 2000. Guidance of Data Quality Assessment, Practical Methods of Data Analysis, EPA QA/G-9. July.

USEPA. 2002. Calculation UIPper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Site.

December.

USEPA. 2022. ProUCL Version 5.2.0 Technical Guide. U.S. Environmental Protection Agency, Office of Research and Development.

USEPA. 2024. Regional Screening Levels (RSLs). U.S. Environmental Protection Agency, Office of Solid Waste and Emergency Response. November.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
February 2025
Tables
Table 2
1 Hour Ambient Air Samples
Proposed Walnut Bluff Development - City of Signal Hill, CA 1,1,2-Trichloro-1,2,2-trifluoroethane
1,1-Difluoroethane
1,2-Dichloroethane
1,4-Dichlorobenzene
Benzene
Carbon tetrachloride
Chloroform
Dichlorodifluoromethane
Ethylbenzene
Naphthalene
o-Xylene
p- & m-Xylenes
Tetrachloroethene
Toluene
Trichlorofluoromethane
-- -- -- -- 0.1 0.47 -- -- -- -- -- -- 0.46 -- --
-- -- -- -- 3.1 42 -- -- -- -- -- -- 42 310 1300
-- -- 0.11 0.26 0.36 0.47 0.12 -- 1.1 0.08 -- -- 11 -- -- 5200 42000 7.3 830 31 100 2 100 1000 3.1 100 100 42 5200 -- WB01-1H 10/9/2024 9:00 - 9:59 0.53 1.1 0.11 0.09 1.8 0.5 0.25 2.3 0.57 0.22 0.65 2 <0.1 2.8 1.2 WB02-1H 10/9/2024 10:31 - 11:31 0.52 1.1 0.093 0.12 1.4 0.49 0.27 2.3 0.75 0.29 0.86 2.6 0.081 2.8 1.2 WB03-1H 10/9/2024 10:35 - 11:33 0.52 1.1 0.093 0.11 1.4 0.5 0.23 2.3 0.81 0.20 0.91 2.8 0.09 2.6 1.2 WB04-1H 10/9/2024 10:47 - 11:46 0.52 1.2 0.091 0.1 1.4 0.5 0.23 2.3 0.74 0.17 0.82 2.5 <0.1 2.6 1.2 WB05-1H 10/9/2024 11:06 - 12:08 0.52 1.1 0.092 0.093 1.3 0.5 0.2 2.3 0.58 0.38 0.64 1.8 <0.1 2.3 1.2 WB06-1H 10/9/2024 10:43 - 11:42 0.52 1.2 0.093 0.1 1.4 0.49 0.23 2.3 0.66 0.23 0.74 2.2 <0.1 2.6 1.2 WB07-1H 10/9/2024 8:36 - 9:42
WB08-1H 10/9/2024 11:11 - 12:11 0.53 1.1 0.088 0.086 1.4 0.5 0.21 2.3 0.56 0.16 0.62 1.7 <0.1 2.6 1.3 WB09-1H 10/9/2024 11:22 - 12:24 0.53 1 0.086 0.093 1.3 0.5 0.22 2.4 0.72 0.34 0.9 2.4 <0.1 2.7 1.3 WB10-1H 10/9/2024 11:17 - 12:20 0.52 1.1 0.089 0.1 1.8 0.51 0.22 2.4 0.61 0.25 0.64 1.9 <0.1 7.2 1.3 WB11-1H 10/9/2024 11:52 - 12:51 0.52 0.89 0.1 0.11 1.8 0.5 0.19 2.3 0.67 0.31 0.75 2.1 0.077 2.8 1.3 WB12-1H 10/9/2024 11:58 - 12:58 0.53 1.7 0.1 0.085 1.7 0.5 0.2 2.4 0.8 0.30 0.92 2.6 0.072 3 1.3 WB13-1H 10/9/2024 9:10 - 10:09 0.52 0.98 0.11 0.093 1.9 0.5 0.22 2.3 0.57 0.24 0.65 1.9 <0.1 2.9 1.2 WB14-1H 10/9/2024 9:18 - 10:19 0.52 0.99 0.11 0.097 1.9 0.5 0.24 2.3 0.58 0.23 0.68 2 <0.1 3.2 1.2 WB17-1H 10/9/2024 13:30 - 14:37 0.53 0.67 0.07 0.08 0.88 0.5 0.19 2.4 0.61 0.18 0.67 2 0.074 1.7 1.3 WB18-1H 10/9/2024 13:52 - 14:56 0.53 0.8 0.073 0.092 1.1 0.5 0.2 2.4 0.52 0.13 0.56 1.5 0.12 2.5 1.3 WB19-1H 10/9/2024 9:52 - 10:54 0.54 1.1 0.11 0.091 1.6 0.5 0.23 2.4 0.69 0.77 0.78 2.4 <0.1 2.8 1.2 Notes:

SLc - - DTSC (May 2022) HHRA Note 3 residential air screening level for carcinogenic effects unless otherwise specified.

SLnc - DTSC (May 2022) HHRA Note 3 residential air screening level for noncancer effects unless otherwise specified.

RSLs C- USEPA (May 2024) Regional Screening Levels for residential air carcinogenic RSLs NC- USEPA (May 2024) Regional Screening Levels for residential air Noncarcinogenic µg/m3 - micrograms per cubic meter
highlighted where above screening criteria
µg/m3
Sample ID Date Time
Can arrived evacuated and could not be analyzed.

DTSC SLc
DTSC SLnc
RSLs C
RSLs NC
Table 3
24 Hour Ambient Air Samples
Proposed Walnut Bluff Development - City of Signal Hill, CA 1,1,2-Trichloro-1,2,2-trifluoroethane 1,1-Difluoroethane 1,2-Dichloroethane 1,4-Dichlorobenzene Benzene Carbon tetrachloride Chloroform Dichlorodifluoromethane Ethylbenzene Naphthalene
o-Xylene
p- & m-Xylenes
Toluene
Trichlorofluoromethane
-- -- -- -- 0.097 0.47 -- -- -- -- -- -- -- --
-- -- -- -- 3.1 42 -- -- -- -- -- -- 310 1300
-- -- 0.11 0.26 0.36 0.47 0.12 -- 1.1 0.083 -- -- -- -- 5200 42000 7.3 830 31 100 2 100 1000 3.1 100 100 5200 -- WB01-24H 10/9 - 10/10/2024 0.52 0.43 0.07 <0.050 0.74 0.47 0.15 2.30 0.29 0.21 0.32 0.94 1.30 1.20 WB02-24H 10/9 - 10/10/2024 0.50 0.44 0.07 0.08 0.88 0.46 0.17 2.30 0.36 0.43 0.38 1.00 1.90 1.20 WB03-24H 10/9 - 10/10/2024 0.52 0.48 0.06 <0.050 0.70 0.48 0.17 2.40 0.25 0.16 0.29 0.79 1.20 1.20 WB04-24H 10/9 - 10/10/2024 0.52 0.45 0.07 <0.050 0.85 0.48 0.15 2.30 0.28 0.18 0.33 0.93 1.40 1.20 WB05-24H 10/9 - 10/10/2024 0.52 0.45 0.07 <0.050 0.91 0.49 0.15 2.30 0.39 0.19 0.50 1.40 2.00 1.20 WB06-24H 10/9 - 10/10/2024 0.52 0.42 0.07 <0.050 0.68 0.48 0.16 2.30 0.25 0.14 0.28 0.82 1.20 1.20 WB07-24H 10/9 - 10/10/2024 0.51 0.45 0.06 <0.050 0.71 0.47 0.16 2.30 0.25 0.14 0.27 0.75 1.20 1.20 WB08-24H 10/9 - 10/10/2024 0.52 0.43 0.07 <0.050 0.69 0.48 0.14 2.30 0.26 0.15 0.29 0.80 1.20 1.20 WB09-24H 10/9 - 10/10/2024 0.53 0.42 0.07 <0.050 0.86 0.49 0.32 2.30 0.38 0.17 0.49 1.40 1.80 1.20 WB10-24H 10/9 - 10/10/2024 0.52 0.43 0.07 <0.050 1.10 0.48 0.15 2.30 0.47 0.28 0.41 1.40 1.70 1.20 WB11-24H 10/9 - 10/10/2024 0.52 0.44 0.07 <0.050 0.69 0.49 0.14 2.40 0.27 0.12 0.29 0.85 1.20 1.20 WB12-24H 10/9 - 10/10/2024 0.52 0.44 0.07 <0.050 0.73 0.49 0.15 2.20 0.27 0.17 0.32 0.89 1.30 1.20 WB13-24H 10/9 - 10/10/2024 0.53 0.44 0.07 <0.050 0.72 0.49 0.17 2.30 0.26 0.15 0.29 0.79 1.20 1.20 WB14-24H 10/9 - 10/10/2024 0.53 0.43 0.07 <0.050 0.73 0.49 0.15 2.20 0.24 0.13 0.27 0.77 1.30 1.20 WB17-24H 10/9 - 10/10/2024 0.52 0.47 0.07 <0.050 0.92 0.50 0.15 2.20 0.34 0.22 0.40 1.10 2.20 1.20 WB18-24H 10/9 - 10/10/2024 0.52 0.48 0.07 <0.050 0.94 0.49 0.14 2.20 0.51 0.21 0.64 1.90 2.10 1.20 WB19-24H 10/9 - 10/10/2024 0.51 0.45 0.08 <0.050 1.10 0.49 0.14 2.30 0.33 0.16 0.36 1.10 1.50 1.20 Notes:

SLc - - DTSC (May 2022) HHRA Note 3 residential air screening level for carcinogenic effects unless otherwise specified.

SLnc - DTSC (May 2022) HHRA Note 3 residential air screening level for noncancer effects unless otherwise specified.

RSLs C- USEPA (May 2024) Regional Screening Levels for residential air carcinogenic RSLs NC- USEPA (May 2024) Regional Screening Levels for residential air Noncarcinogenic µg/m3 - micrograms per cubic meter
highlighted where above screening criteria
DTSC SLc
DTSC SLnc
RSLs C
RSLs NC
µg/m3
Sample ID Date
Table 4
2 Week Ambient Air Samples
Proposed Walnut Bluff Development - City of Signal Hill, CA 1,2,4-Trimethylbenzene
1,2-Dichloroethane
1,3,5-Trimethylbenzene
1,4-Dichlorobenzene
Benzene
Bromomethane
Carbon Tetrachloride
Chloroethane
Chloroform
Chloromethane
Ethylbenzene
1,1,2-Trichloro-1,2,2-trifluoroethane
Freon 114
Dichlorodifluoromethane
Methylene Chloride
Naphthalene
Styrene
Tetrachloroethene
Toluene
Trichlorofluoromethane
Xylene (total)
m,p-Xylenes
o-Xylene
-- -- -- -- 0.097 -- 0.47 -- -- -- -- -- -- -- -- -- -- 0.46 -- -- -- -- -- -- -- -- -- 3.1 -- 42 -- -- -- -- -- -- -- -- -- 940 42 310 1300 -- -- -- -- 0.11 -- 0.26 0.36 -- 0.47 -- 0.12 -- 1.1 -- -- -- 100 0.083 -- 11 -- -- -- -- -- 63 7.3 63 830 31 5.2 100 4200 2 94 1000 5200 -- 100 630 3.1 1000 42 5200 -- 100 100 100 WB01-14D 10/1 - 10/15/2024 0.30 0.063 0.074 <0.066 0.8 0.08 0.46 <0.029 0.14 0.99 0.27 0.46 0.11 2.3 0.55 0.059 0.1 <0.075 1.4 1.1 1.1 0.79 0.32 WB02-14D 10/1 - 10/15/2024 0.37 0.066 0.10 <0.060 0.83 0.084 0.45 0.049 0.16 0.99 0.33 0.44 0.12 2.3 0.60 0.077 0.12 <0.068 1.5 1 1.3 0.90 0.35 WB02-14D-R2 12/2 - 12/16/2024 1.2 0.1 0.34 0.082 1.9 0.15 0.44 <0.026 0.19 1.1 0.88 0.46 0.1 2.2 0.84 0.15 0.41 0.1 3.3 1.1 3.5 2.50 0.95 WB03-14D 10/1 - 10/15/2024 0.24 0.062 0.055 <0.060 0.72 0.082 0.47 <0.026 0.17 1.0 0.25 0.47 0.12 2.3 0.59 <0.052 0.076 <0.068 1.2 1.1 0.99 0.71 0.28 WB03-14D-R2 12/2 - 12/16/2024 0.92 0.097 0.26 0.092 1.7 0.16 0.45 <0.026 0.2 1.1 0.73 0.47 0.1 2.2 0.93 0.11 0.46 0.11 3.2 1.1 3.2 2.3 0.89 WB04-14D 10/1 - 10/15/2024 0.29 0.062 0.065 <0.060 0.74 0.075 0.47 <0.026 0.16 1.0 0.26 0.47 0.12 2.3 1.2 <0.052 0.11 <0.068 1.4 1.1 1.1 0.76 0.3 WB05-14D 10/1 - 10/15/2024 0.29 0.061 0.074 <0.072 3.2** 0.084 0.46 <0.032 0.16 1.0 0.26 0.46 0.11 2.3 0.76 0.074 0.13 <0.081 5.8** 1.1 1.0 0.73 0.29 WB05-14D-R2 12/2 - 12/16/2024 1.3 0.096 0.33 0.09 1.7 0.15 0.45 <0.029 0.19 1.1 0.72 0.47 0.1 2.2 0.91 0.16 0.47 0.12 3.4 1.1 3.1 2.3 0.87 WB06-14D 10/1 - 10/15/2024 0.26 0.062 0.065 <0.060 0.74 0.081 0.47 0.045 0.15 1.0 0.28 0.46 0.12 2.3 0.62 <0.052 0.11 <0.068 1.6 1.1 1.0 0.74 0.29 WB07-14D 10/1 - 10/15/2024 0.29 0.061 0.065 <0.060 0.72 0.085 0.46 0.088 0.14 0.99 0.26 0.46 0.12 2.3 0.67 0.059 0.12 <0.068 1.5 1.1 0.99 0.71 0.28 WB08-14D 10/1 - 10/15/2024 0.27 0.062 0.061 <0.066 0.74 0.08 0.47 0.058 0.14 1.0 0.26 0.47 0.12 2.3 0.74 <0.058 0.099 <0.075 1.5 1.1 0.98 0.70 0.28 WB09-14D 10/1 - 10/15/2024 0.29 0.063 0.068 <0.060 0.81 0.092 0.47 0.042 0.18 1.0 0.27 0.47 0.12 2.3 2.8 0.078 0.12 <0.068 1.6 1.1 1.1 0.79 0.31 WB10-14D 10/1 - 10/15/2024 0.50 0.072 0.14 <0.060 0.99 0.083 0.46 <0.026 0.15 0.98 0.45 0.46 0.12 2.3 0.85 0.14 0.13 <0.068 1.3 1.1 1.5 1.2 0.37 WB10-14D-R2 12/2 - 12/16/2024 1.10 0.1 0.3 <0.060 1.9 0.15 0.45 <0.026 0.2 1.1 0.84 0.46 0.1 2.2 0.87 0.06 0.36 0.12 3.2 1.1 3.3 2.5 0.87 WB11-14D 10/1 - 10/15/2024 0.30 0.061 0.073 <0.060 0.78 0.089 0.47 0.089 0.14 1.0 0.27 0.47 0.12 2.3 0.57 0.086 0.13 <0.068 1.6 1.1 1.1 0.78 0.31 WB12-14D 10/1 - 10/15/2024 0.32 0.062 0.074 <0.060 0.85 0.081 0.46 0.10 0.14 1.0 0.29 0.46 0.12 2.3 0.57 0.059 0.14 <0.068 1.9 1.1 1.2 0.83 0.33 WB13-14D 10/1 - 10/15/2024 0.35 0.065 0.085 <0.066 0.89 0.083 0.46 <0.029 0.17 1.0 0.31 0.46 0.11 2.3 0.60 0.12 0.32 0.08 2.0 1.1 1.3 0.94 0.37 WB14-14D 10/1 - 10/15/2024 0.27 0.063 0.067 <0.060 0.78 0.085 0.46 <0.026 0.13 1.0 0.26 0.46 0.11 2.3 0.59 0.057 0.086 <0.068 1.3 1.1 1.1 0.75 0.3 WB17-14D 10/1 - 10/15/2024 0.33 0.062 0.085 <0.066 0.82 0.084 0.46 0.032 0.14 1.0 0.3 0.46 0.11 2.3 0.53 0.072 0.13 <0.075 1.7 1.1 1.2 0.89 0.35 WB18-14D 10/1 - 10/15/2024 0.44 0.062 0.11 <0.072 0.79 0.11 0.47 0.035 0.14 1.1 0.3 0.47 0.12 2.4 0.56 0.073 0.13 <0.081 1.7 1.1 1.2 0.88 0.35 WB19-14D 10/1 - 10/15/2024 0.30 0.067 0.081 <0.066 1 0.08 0.45 0.069 0.13 1.0 0.31 0.45 0.11 2.3 0.50 <0.058 0.18 <0.075 1.8 1.1 1.3 0.95 0.37 Notes:

SLc - - DTSC (May 2022) HHRA Note 3 residential air screening level for carcinogenic effects unless otherwise specified. ** determined to be a statistical outlier and excluded from all calculations of risk per Section 4.4 SLnc - DTSC (May 2022) HHRA Note 3 residential air screening level for noncancer effects unless otherwise specified.

RSLs C- USEPA (May 2024) Regional Screening Levels for residential air carcinogenic RSLs NC- USEPA (May 2024) Regional Screening Levels for residential air Noncarcinogenic µg/m3 - micrograms per cubic meter
highlighted where above screening criteria
RSLs NC
ug/m3
Sample ID Date
DTSC SLc
DTSC SLnc
RSLs C
Analyte N Detects Percent
FOD
Max
Outdoor
Air
(µg/m3)
95% UCL
Outdoor
Air
(µg/m3)
* Res SLc
(µg/m3
)
Res
SLnc
(µg/m3
)
* Cancer
Risk
Hazard
Quotient
Petroleum Hydrocarbons
Benzene 13 13 100 1.0 0.84 0.097 3.1 8.6E-06 2.7E-01
Toluene 13 13 100 2.0 1.6 NTV 310 - 5.3E-03
Ethylbenzene 14 14 100 0.45 0.31 1.1 2 1,000 2 2.8E-07 3.1E-04 m,p-Xylenes 14 14 100 1.2 0.87 NTV 100 2 - 8.7E-03
o-Xylene 14 14 100 0.37 0.33 NTV 100 2 - 3.3E-03
Naphthalene 14 10 71 0.14 0.086 0.083 3.1 2 1.0E-06 2.8E-02 1,2,4-Trimethylbenzene 14 14 100 0.50 0.34 NTV 63 2 - 5.4E-03 1,3,5-Trimethylbenzene 14 14 100 0.14 0.086 NTV 63 2 - 1.4E-03

1.0E-05 3.2E-01
Non-Petroleum Hydrocarbons
1,2-Dichloroethane 14 14 100 0.072 0.065 NTV NTV - -
Bromomethane 14 14 100 0.092 0.085 NTV 5.2 2 - 1.6E-02
Carbon Tetrachloride 14 14 100 0.47 0.47 0.47 42 9.9E-07 1.1E-02 Chloroethane 14 7 50 0.10 0.060 NTV 4,200 2 - 1.4E-05
Chloroform 14 14 100 0.18 0.16 0.12 2 2.0 2 1.3E-06 8.0E-02 Chloromethane 14 14 100 1.0 1.0 NTV 94 2 - 1.1E-02
Freon 113 14 14 100 0.47 0.47 NTV 5,200 2 - 9.0E-05
Freon 114 14 14 100 0.12 0.12 NTV NTV - -
Freon 12 14 14 100 2.3 2.3 1 NTV 100 2 - 2.3E-02
Methylene Chloride 14 14 100 2.8 1.1 1 420 1.1E-06 2.7E-03 Styrene 14 14 100 0.32 0.16 NTV 940 - 1.6E-04
Tetrachloroethene 14 1 7.1 0.080 0.080 1 0.46 42 1.7E-07 1.9E-03 Trichlorofluoromethane 14 14 100 1.1 1.1 0.48 2 2.1 2 2.3E-06 5.3E-01

5.9E-06 6.7E-01

1.6E-05 9.9E-01
Notes:

N = sample size
FOD = frequency of detection.

NTV = no toxicity/screening value available

2. USEPA (2024) Regional Screening Levels for residential air. November.

Table 5
Characterization of Potential Chronic Human Health Risks Associated with Onsite Outdoor Air Exposure
Proposed Walnut Bluff Development

1. Insufficient data for calculating 95% UCL using standard USEPA (2022) methods. Value shown is the lower of the 95% UCL calculated using the 1/2 detection limit method or the maximum concentration.

Total Cumulative Cancer Risk and Hazard Index3
Cumulative Cancer Risk and Hazard Index
Cumulative Cancer Risk and Hazard Index

3. Total Cumulative Cancer Risk and Hazard Index is the combined cancer risks and hazard indices from petroleum hydrocarbons and non-petroleum hydrobarbons.
95% UCL = 95% upper confidence limit on the mean concentration calculated using USEPA (2022) ProUCL (version 5.2) statistical software.

Res SLc - - DTSC (2022a) HHRA Note 3 residential air screening level for carcinogenic effects unless otherwise specified. June.

Res SLnc - DTSC (2022a) HHRA Note 3 residential air screening level for noncancer effects unless otherwise specified. June.

Analyte Max 1-Hour
(µg/m3)
Acute REL
(µµg/m3) Source
Acute Hazard
Quotient
(unitless)
Petroleum Hydrocarbons
Benzene 1.9 27 OEHHA 7.0E-02
Ethylbenzene 0.81 143,297 AEGL 5.7E-06
Naphthalene 0.38 200 AGV 1.9E-03
Toluene 7.2 5,000 OEHHA 1.4E-03
o-Xylene 0.92 22,000 OEHHA 4.2E-05
p- & m-Xylenes 2.8 22,000 OEHHA 1.3E-04
Total Xylenes2

3.7 22,000 OEHHA 1.7E-04
Cumulative Acute Hazard Index 7.4E-02
Non-Petroleum Hydrocarbons
1,1,2-Trichloro-1,2,2-trifluoroethane 0.53 NTV - -
1,1-Difluoroethane 1.7 NTV - -
1,2-Dichloroethane 0.11 200,000 PAC 5.5E-07
1,4-Dichlorobenzene 0.12 NTV - -
Carbon tetrachloride 0.51 1,900 OEHHA 2.7E-04
Chloroform 0.27 150 OEHHA 1.8E-03
Dichlorodifluoromethane 2.4 NTV - -
Tetrachloroethene 0.09 20,000 AGV 4.5E-06
Trichlorofluoromethane 1.3 NTV - -
Cumulative Acute Hazard Index 2.1E-03
Total Cumulative Acute Hazard Index1

7.6E-02
Notes:

AEGL = U.S. Environmental Protection Agency (2019) Acute Exposure Guideline Level PAC = U.S. Department of Energy (2018) Protective Action Criteria AGV = Minnesota Department of Health (2024) acute Air Guidance Values (AGVs) NTV = no toxicity/screening value available.

2. Total Xyelenes not included in the cumulative HI calculations as this would result in doublecounting xylenes whereby the cumulative HI for o-xylene + the cumulative HI for m&p-xylene is greater than the cumulative HI for Total Xylenes.

1. Total Cumulative Acute Hazard Index is the combined acute hazard indices from petroleum hydrocarbons and non-petroleum hydrocarbons.

OEHHA = California Office of Environmental Health Hazard Assessment (2024) Acute Reference Exposure Levels
Table 6
Characterization of Potential Acute Human Health Risks
Associated with Onsite Outdoor Air Exposure
Proposed Walnut Bluff Development
Analyte N Detects Percent
FOD
Max
Outdoor
Air
(µg/m3)
95% UCL
Outdoor
Air
(µg/m3)
* Res SLc
(µg/m3)
Res SLnc
(µg/m3) * Cancer
Risk
Hazard
Quotient
Petroleum Hydrocarbons
Benzene 3 3 100 1.0 1.0 1 0.097 3.1 1.0E-05 3.2E-01
Toluene 3 3 100 1.8 1.8 1 NTV 310 - 5.8E-03
Ethylbenzene 3 3 100 0.31 0.31 1 1.1 2 1,000 2 2.8E-07 3.1E-04 m,p-Xylenes 3 3 100 0.95 0.95 1 NTV 100 2 - 9.5E-03
o-Xylene 3 3 100 0.37 0.37 1 NTV 100 2 - 3.7E-03
Naphthalene 3 2 67 0.073 0.073 1 0.083 3.1 2 8.8E-07 2.4E-02 1,2,4-Trimethylbenzene 3 3 100 0.44 0.44 1 NTV 63 2 - 7.0E-03 1,3,5-Trimethylbenzene 3 3 100 0.11 0.11 1 NTV 63 2 - 1.7E-03

1.1E-05 3.7E-01
Notes:

N = sample size
FOD = frequency of detection.

NTV = no toxicity/screening value available

2. USEPA (2024) Regional Screening Levels for residential air. May. 95% UCL = 95% upper confidence limit on the mean concentration calculated using USEPA (2022) ProUCL (version 5.2) statistical software.

Res SLc - - DTSC (2022) HHRA Note 3 residential air screening level for carcinogenic effects unless otherwise specified. June.

Res SLnc - DTSC (2022) HHRA Note 3 residential air screening level for noncancer effects unless otherwise specified. June.

1. Insufficient data for calculating 95% UCL using standard USEPA (2022) methods. Value shown is the lower of the 95% UCL calculated using the 1/2 detection limit method or the maximum concentration.

Table 7
Characterization of Potential Chronic Human Health Risks Associated with Offsite Ambient Air Exposure to Petroleum-Related COPCs Proposed Walnut Bluff Development
Cumulative Cancer Risk and Hazard Index
Long Beach Regional Long Beach Regional Long Beach Regional Long Beach Regional Long Beach Regional MATES II 1998-1990 2.6 3.6 7.9 13 1.4 2.1 6.1 9.8 ND ND MATES III 2005 1.7 1.9 5.7 7.5 0.94 1.2 4.5 4.3 ND 0.20 MATES IV 2012-2013 1.0 1.2 2.8 4.0 0.48 0.90 1.9 3.0 0.08 0.10 MATES V 2018-2019 1.0 0.88 2.3 2.8 0.42 0.49 1.7 2.1 ND 0.061 WB Offsite- Oct 2024
WB Onsite - Oct 2024
Long Beach Regional Long Beach Regional Long Beach Regional Long Beach Regional Long Beach Regional MATES II 1998-1990 2.7E-05 3.7E-05 2.6E-02 4.2E-02 1.3E-06 1.9E-06 6.1E-02 9.8E-02 -- -- MATES III 2005 1.7E-05 1.9E-05 1.8E-02 2.4E-02 8.6E-07 1.1E-06 4.5E-02 4.3E-02 -- 1.8E-07 MATES IV 2012-2013 1.1E-05 1.2E-05 9.0E-03 1.3E-02 4.3E-07 8.2E-07 1.9E-02 3.0E-02 9.2E-07 1.3E-06 MATES V 2018-2019 1.1E-05 9.1E-06 7.4E-03 9.2E-03 3.8E-07 4.4E-07 1.7E-02 2.1E-02 -- 7.4E-07 WB Offsite- Oct 2024
WB Onsite - Oct 2024
Notes:
1,2,4-Trimethylbenzene and 1,3,5-trimethylbenzene are not shown as they're concentrations were not reported in the MATES regional studies.

Bold values exceed MATES regional air concentrations.

Naphthalene
cancer risk noncancer hazard index cancer risk noncancer hazard index cancer risk

8.2E-06 4.9E-03 2.6E-07 1.1E-02 9.7E-07
Study
Benzene Toluene Ethylbenzene Xylenes

9.0E-06 5.6E-03 2.8E-07 1.2E-02 8.7E-07

0.87 1.7 0.30 1.2 0.073

0.80 1.5 0.29 1.1 0.081
Table 8
Comparison of Regional and Walnut Bluff
Average Outdoor Air Petroleum Hydrocarbon Concentrations Proposed Walnut Bluff Development
Study
Benzene Toluene Ethylbenzene Xylenes Naphthalene
µg/m3 µg/m3 µg/m3 µg/m3 µg/m3
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
February 2025
Figures
(Source: Mearns Consulting, LLC 2021)
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BASIS OF BEARINGS

THE BEARINGS SHOWN HEREON ARE BASED ON THE

CENTERLINE OF WALNUT A VENUE AS SHOWN ON RECORD

OF SURVEY AS PER MAP RLED IN RECORD OF SURVEY
BOOK

BENCHMARK INFORMATION
98, PAGE 89, BEING NORTH 00"08'30" EAST.

THE ELEVATIONS SHOWN HEREON ARE BASED ON THE
FOLLOWING BENCHMARK:

BM No.: 063 ELEV.: 158.588' {1985} {CITY OF SIGNAL
HILL)
DA TUM: NGVD 1929 {MSL}
DESCRIPTION: WILLOW STREET & WALNUT A VENUE SW
CORNER BRASS SIDK ST IN 1' SQ. CONCRETE 45' S & 80'
W/O C.L. INT. {1' W/O BCR & 1' S/O C.F.) C.L.B. NO. 95
{RE 3111 1971}
SURVEYOR NOT£
COORDINATES REPORTED REPRESENT "GLOBAL -WGS
1984" VALUES
o· 40• ao· 120· N
- -- ---
-
- fl
DA TE: 08/26/24
J/N: 24-048
DRAWN BY: MMY
GRAPHIC SCALE: 1 "=40' [.I

WALNUT BLUFF

WEU AS-BUILT SURVEY

SIGNAL HILL, CALIFORNIA
Figure 2

WB18 SITE
Signal Hill
City Limits
Note:

See Figure 3 for Sampling Legend.

WB17 WB19
FIGURE 4
OFF-SITE OUTDOOR AIR SAMPLING PLANSept 2023
West Unit (1166 N-Met)
Oct 2023
West Unit (1166 N-Met)
Sources Points of Release Transport Mechanisms Exposure Media Exposure Routes Adults Children
Ingestion x x
Oil and Gas Wells Outdoor Air Dispersion Outdoor Air Dermal Contact x x Inhalation o o
Complete Exposure Pathway: o
Incomplete Exposure Pathway: x
Human Receptors
Figure 5
Human Health Risk Assessment Conceptual Site Model
Proposed Walnut Bluff Development
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
February 2025
Charts
0 200
400
600
800
1000
1200
1400
1600
1800
2000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB01 - PID Data and Sampling Periods
2 Week Sample Period 24 Hour Sample Period 1 Hour Sample Period CHART
1 0
100
200
300
400
500
600
700
800
900
1000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB02 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
2 0
100
200
300
400
500
600
700
800
900
1000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-03 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
3 0
100
200
300
400
500
600
700
800
900
1000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-04 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
4 0
100
200
300
400
500
600
700
800
900
1000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-05 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
5 0
50 100
150
200
250
300
350
400
450
500
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-06 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
6 0
1000
2000
3000
4000
5000
6000
7000
8000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-07 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
7 0
50 100
150
200
250
300
350
400
450
500
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-08 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
8 0
50 100
150
200
250
300
350
400
450
500
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-09 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
9 0
50 100
150
200
250
300
350
400
450
500
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-10 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
10 0
100
200
300
400
500
600
700
800
900
1000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-11 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
11 0
100
200
300
400
500
600
700
800
900
1000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-12 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
12 0
100
200
300
400
500
600
700
800
900
1000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-13 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
13 0
100
200
300
400
500
600
700
800
900
1000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-14 - PID Data and Sampling Periods
2 Week Sampling Period 1 Hour Sampling Period 24 Hour Sampling Period CHART
14 0
50 100
150
200
250
300
350
400
450
500
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-17 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
15 0
100
200
300
400
500
600
700
800
900
1000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concetration ug/m3
WB-18 - PID Data and Sampling Periods
2 Week Sampling Period 24 Hour Sampling Period 1 Hour Sampling Period CHART
16 0
200
400
600
800
1000
1200
1400
1600
1800
2000
10/1/24 0:00:0010/3/24 0:00:0010/5/24 0:00:0010/7/24 0:00:0010/9/24 0:00:00 10/11/24 0:00:0010/13/24 0:00:0010/15/24 0:00:00
PID Concentration ug/m3
WB-19 - PID Data and Sampling Locations
2 Week Sampling Period 24 Hour Sampling Period
Equipment was not recording
during 1 hour sampling
CHART
17 0

0.5 1

1.5 2

2.5 3

3.5 4

4.5 5
WB01 WB02 WB03 WB04 WB05 WB06 WB07 WB08 WB09 WB10 WB11 WB12 WB13 WB14 WB17 WB18 WB19 Benzene Concentration µg/m3
Chart 20 - Benzene Concentrations in 1 Hour, 24 Hours, and 2 Week Samples 1 Hour 24 Hours 2 Week
WB-07 did not have a 1-hour sample analyzed
0 1
2 3
4 5
6 7
8 9
10 WB01 WB02 WB03 WB04 WB05 WB06 WB07 WB08 WB09 WB10 WB11 WB12 WB13 WB14 WB17 WB18 WB19 Toluene Concentration µg/m3
Chart 21 - Toluene Concentrations in 1 Hour, 24 Hours, and 2 Week Samples 1 Hour 24 Hours 2 Week
WB-07 did not have a 1-hour sample analyzed
0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 0.9
1 WB01 WB02 WB03 WB04 WB05 WB06 WB07 WB08 WB09 WB10 WB11 WB12 WB13 WB14 WB17 WB18 WB19 Ethylbenzene Concentration µg/m3
Chart 22- Ethylbenzene Concentrations in 1 Hour, 24 Hours, and 2 Week Samples 1 Hour 24 Hours 2 Week
WB-07 did not have a 1-hour sample analyzed
0 0.5
1 1.5
2 2.5
3 3.5
4 4.5
5 WB01 WB02 WB03 WB04 WB05 WB06 WB07 WB08 WB09 WB10 WB11 WB12 WB13 WB14 WB17 WB18 WB19 Total Xylenes Concentration µg/m3
Chart 23 - Total Xylenes Concentrations in 1 Hour, 24 Hours, and 2 Week Samples 1 Hour 24 Hours 2 Week
WB-07 did not have a 1-hour sample analyzed

0.00 0.10

0.20 0.30

0.40 0.50

0.60 0.70

0.80 0.90

1.00 WB01 WB02 WB03 WB04 WB05 WB06 WB07 WB08 WB09 WB10 WB11 WB12 WB13 WB14 WB17 WB18 WB19 Naphthalene Concentration µg/m3
Chart 24 - Naphthalene Concentrations in 1 Hour, 24 Hours, and 2 Week Samples 1 Hour 24 Hours 2 Week
Samples without a bar are non-detect
WB-07 did not have a 1-hour sample analyzed
0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 0.9
1 WB01 WB02 WB03 WB04 WB05 WB06 WB07 WB08 WB09 WB10 WB11 WB12 WB13 WB14 WB17 WB18 WB19 1,2,4-TMB and 1,3,5-TMB Concentration µg/m3
Chart 25 - 1,2,4-TMB and 1,3,5- TMB in 2 Week Samples
1,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene
1,2,4-TMB and 1,3,5-TMB
were not analyzed
in the 1 hour and 24 hour samples
Chart 26 - Petroleum Fingerprints
0 10
20 30
40 Percent of Total PH
WB01-14D
Total PH = 4.0 µgm3
0 10
20 30
40 Percent of Total PH
WB02-14D
Total PH = 4.5 µgm3
0 10
20 30
40 Percent of Total PH
WB03-14D
Total PH = 3.5 µgm3
0 10
20 30
40 Percent of Total PH
WB04-14D
Total PH = 3.9 µgm3
0 10
20 30
40 Percent of Total PH
WB06-14D
Total PH = 4.0 µgm3
0 10
20 30
40 50
60 Percent of Total PH
WB05-14D
Total PH = 10.7 µgm3
0 10
20 30
40 Percent of Total PH
WB07-14D
Total PH = 3.9 µgm3
0 10
20 30
40 Percent of Total PH
WB08-14D
Total PH = 3.8 µgm3
0 10
20 30
40 Percent of Total PH
WB09-14D
Total PH = 4.2 µgm3
0 10
20 30
40 Percent of Total PH
WB10-14D
Total PH = 5.0 µgm3
0 10
20 30
40 Percent of Total PH
WB11-14D
Total PH = 4.2 µgm3
0 10
20 30
40 Percent of Total PH
WB12-14D
Total PH = 4.7 µgm3
0 10
20 30
40 Percent of Total PH
WB13-14D
Total PH = 5.1 µgm3
0 10
20 30
40 Percent of Total PH
WB14-14D
Total PH = 3.8 µgm3
0 10
20 30
40 Percent of Total PH
WB17-14D
Total PH = 4.5 µgm3
0 10
20 30
40 Percent of Total PH
WB18-14D
Total PH = 4.6 µgm3
0 10
20 30
40 Percent of Total PH
WB19-14D
Total PH = 4.8 µgm3
0 10
20 30
40 50
Percent of Total PH
Region - MATES V 2018-2019
Total PH = 6.35 µgm3
0 10
20 30
40 50
60 Percent of Total PH
Region - MATES V Oct 2018
Total PH = 7.57 µgm3
0 10
20 30
40 50
Percent of Total PH
Long Beach - MATES V Oct 2018
Total PH = 5.95 µgm3
NW
'
, I
WNW '
I
I
I I I
w4
\
I \ \
WSW
-
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\
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\ .
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WB15/10.1.2024-10.15.2024
N
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s
• > 27.0 • 24.0 -27.0 • 21.0 -24.0 • 18.0 • 21.0
NE
• 15.0 -18.0
,
• 12.0 • 15.0
/
\
• 9.0 • 12.0
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• 6.0 • 9.0
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-
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Chart 27 WB15 Windrose Diagram
WB16
-Weather Station/10.1.2024 -10 15.2024
• > 27.0
N
12%�
• 24.0
-27.0

NNW NNE
\ . I
• 21.0
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NW ,. NE
• 15.0 -18.0
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, / I '• L � \
' <
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, \ . / '
SW ' SE ' '\
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I
s
Chart 28 WB16 Windrose Diagram
Signal Hill
S
ignal Hill
WB17 -WeatherStation/10.1.2024 -10 15.2024
•
> 27.0
N
�5%� • 24.0
-27.0

NNW NNE
.\ . ., • 21.0
-24.0
/ \ • 18.0 -21.0
/ 1-2%�
NW ' NE • 15.0 -18.0 ' I ' , \_ - , • 12.0 -15.0 I 9%� \ , , . • 9.0 -12.0 I " ; , ;' ---✓ \ • 6.0
-9.0
>< WNW ENE 3.0
-6.0
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;<, \ \/ '(· I I -. \ ✓ \ � \
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'-.... I
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SW
I
SE
/ , . '

SSW SSE
I --
s
Chart 29 WB17 Windrose Diagram
Chart 30 - WB15 Windspeed, Temperature, and Barometric Pressure Chart 31 - WB16 Windspeed, Temperature, and Barometric Pressure Chart 32 - WB17 Windspeed, Temperature, and Barometric Pressure

0.0E+00

1.0E-05

2.0E-05

3.0E-05

4.0E-05

5.0E-05
1995 2000 2005 2010 2015 2020 2025
Benzene Cancer Risk
Chart 33
Comparison of Regional vs Walnut Bluff Benzene Cancer Risk Using MATES Risk Assessment Methodology (Average Concentration) 1998 - 2024
MATES II-V - Long Beach
MATES II - V - Regional
WB Offsite - Oct 2024
WB Onsite - w/o Outlier Oct 2024
WB Onsite - w/ Outlier Oct 2024

0.0E+00

5.0E-03

1.0E-02

1.5E-02

2.0E-02

2.5E-02

3.0E-02

3.5E-02

4.0E-02

4.5E-02
1995 2000 2005 2010 2015 2020 2025
Toluene Noncancer Hazard Index
Chart 34
Comparison of Regional vs Walnut Bluff Toluene Noncancer Hazard Index Using MATES Risk Assessment Methodology (Average Concentration) 1998 - 2024
MATES II-V - Long Beach
MATES II - IV - Regional
WB Offsite - Oct 2024
WB Onsite - w/o Outlier Oct 2024
WB Onsite - w/ Outlier Oct 2024

0.0E+00

2.0E-07

4.0E-07

6.0E-07

8.0E-07

1.0E-06

1.2E-06

1.4E-06

1.6E-06

1.8E-06

2.0E-06
1995 2000 2005 2010 2015 2020 2025
Ethylbenzene Cancer Risk
Chart 35
Comparison of Regional vs Walnut Bluff Ethylbenzene Cancer Risk Using MATES Risk Assessment Methodology (Average Concentration) 1998 - 2024
MATES II-V - Long Beach
MATES II - IV - Regional
WB Offsite - Oct 2024
WB Onsite - Oct 2024

0.0E+00

2.0E-02

4.0E-02

6.0E-02

8.0E-02

1.0E-01

1.2E-01
1995 2000 2005 2010 2015 2020 2025
Xylenes Noncancer Hazard Index
Chart 36
Comparison of Regional vs Walnut Bluff Total Xylenes Noncancer Hazard Index Using MATES Risk Assessment Methodology (Average Concentration) 1998 - 2024
MATES II-V - Long Beach
MATES II - IV - Regional
WB Offsite - Oct 2024
WB Onsite - Oct 2024

0.0E+00

5.0E-07

1.0E-06

1.5E-06

2.0E-06

2.5E-06
1995 2000 2005 2010 2015 2020 2025
Naphthalene Cancer Risk
Chart 37
Comparison of Regional vs Walnut Bluff Naphthalene Cancer Risk Using MATES Risk Assessment Methodology (Average Concentration) 1998 - 2024
MATES II-V - Long Beach
MATES II - IV - Regional
WB Offsite - Oct 2024
WB Onsite - Oct 2024

0.8 0.83

0.72 0.74

3.2 0.74 0.72 0.74 0.81

0.99 0.78 0.85 0.890.78 0.82 0.79

1.0 1.02

0.885
0 0.5
1 1.5
2 2.5
3 3.5
Benzene (ug/m3)
Chart 38 - 14-Day Benzene Concentrations
Onsite samples at Active O&G Wells
Onsite samples
Long Beach ave = 1.0 Region ave = 0.89
Onsite statistical outlier (p=0.01)
Offsite samples
Onsite Sample at Idle O&G Wells and area
of relatively elevated soil gas benzene
WB ave = 0.80 WB ave = 0.97 w outlier

1.4 1.5

1.2 1.4

5.8 1.6 1.5 1.5 1.6

1.3 1.6

1.9 2

1.3 1.7 1.7 1.8

2.31 2.84
0 0.5
1 1.5
2 2.5
3 3.5
4 4.5
5 5.5
6 6.5
7 7.5
8 Toluene (ug/m3)
Chart 39 - 14-Day Toluene Concentrations
Long Beach ave = 2.3 Region ave = 2.8
Onsite samples at Active O&G Wells
Onsite samples
Onsite statistical outlier (p=0.01)
WB ave = 1.5 WB ave = 1.5 w outlier
Offsite samples
Onsite Sample at Idle O&G Wells and area
of relatively elevated soil gas benzene

0.27 0.33

0.25 0.26 0.26 0.28 0.26 0.26 0.27

0.45 0.27 0.29 0.31

0.26 0.3 0.3 0.31

0.0969

0.486
0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 0.9
1 Ethylbenzene (ug/m3)
Chart 40 - 14-Day Ethylbenzene Concentrations
Onsite samples at Active O&G Wells
Onsite samples
Long Beach ave = 0.096 Region ave = 0.48
Offsite samples
Onsite Sample at Idle O&G Wells and area
of relatively elevated soil gas benzene
WB ave = 0.29

1.1 1.3

0.99 1.1 1.0 1.0 0.99 0.98 1.1

1.5 1.1 1.2 1.31.1 1.2 1.2 1.3

0.40 2.05
0 0.5
1 1.5
2 2.5
3 3.5
4 4.5
5 Total Xylenes (ug/m3)
Chart 41 - 14-Day Xylenes Concentrations
Onsite samples at Active O&G Wells
Onsite samples
Long Beach ave = 0.40 Region ave = 2.0
Offsite samples
Onsite Sample at Idle O&G Wells and area
of relatively elevated soil gas benzene
WB ave = 1.1

0.059 0.077
0 0

0.074
0 0.059 0

0.078

0.14 0.086 0.059

0.12 0.057 0.072 0.073
0 0.00

0.32 0

0.1 0.2

0.3 0.4

0.5 0.6

0.7 0.8

0.9 1
Naphthalene (ug/m3)
Chart 42 - 14-Day Naphthalene Concentrations
Onsite samples at Active O&G Wells
Onsite samples
Long Beach ave = No Data Region ave =0.32
Offsite samples
Onsite Sample at Idle O&G Wells and area
of relatively elevated soil gas benzene
WB ave = 0.08
0 0.5
1 1.5
2 2.5
3 3.5
WB02 WB03 WB05 WB10
Benzene Concentration µg/m3
Chart 43 - Benzene Concentrations in 2 Week Samples in October 2024 and December 2024 2 Week - Oct 2 Week - Dec
0 1
2 3
4 5
6 7
WB02 WB03 WB05 WB10
Toluene Concentration µg/m3
Chart 44 - Toluene Concentrations in 2 Week Samples in October 2024 and December 2024 2 Week - Oct 2 Week - Dec
0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 0.9
1 WB02 WB03 WB05 WB10
Ethylbenzene Concentration µg/m3
Chart 45 - Ethylbenzene Concentrations in 2 Week Samples in October 2024 and December 2024
2 Week - Oct 2 Week - Dec
0 0.5
1 1.5
2 2.5
3 3.5
4 WB02 WB03 WB05 WB10
Total Xylenes Concentration µg/m3
Chart 46 - Total Xylenes Concentrations in 2 Week Samples in October 2024 and December 2024
2 Week - Oct 2 Week - Dec
0 0.04

0.08 0.12

0.16 0.2
WB02 WB03 WB05 WB10
Naphthalene Concentration µg/m3
Chart 47 - Naphthalene Concentrations in 2 Week Samples in October 2024 and December 2024
2 Week - Oct 2 Week - Dec
WB03 sample in October was non-detect for Naphthalene
0 0.2

0.4 0.6

0.8 1

1.2 1.4
WB02 WB03 WB05 WB10
1,2,4-TMB and 1,3,5-TMB Concentration µg/m3
Chart 48 - 1,2,4-TMB and 1,3,5- TMB in 2 Week Samples in October and December 2024 1,2,4-Trimethylbenzene
2 Week - Oct
1,2,4-Trimethylbenzene
2 Week - Dec
1,3,5-Trimethylbenzene
2 Week - Oct
1,3,5-Trimethylbenzene
2 Week - Dec
• > 24.0
N
18%�
• 21.0
-24.0

NNW NNE
\ . I 18.0 -21.0
\
-15%
I
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NW ,. NE
• 12.0 -15.0
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Chart 49 WB 16 Windrose
Diagram (December
2024)
WB16 -Weather Station/12.2.2024 -12 16.2024
Wrnd Frequency(%)
50 40
30 20
10 WB16 12.2.2024 to 12.16.2024
Mean wind speed: 4. 1 mph
Sca e parameter (A): 4.55 mph
Shape parameter (k): 1.53
---Wind speed
0 -f.....-.--.--1-....-L;::::::::�;;;::::L...,---,,--..,...... ....... --.-...... -.-....... -� 2 4 6 8 10 12 14 16 18 � � 24 ���a M
Wind Speed (mph)
Chart 50 Windspeed (December 2024)

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5
January February March April May June July August September October November December micrograms per cubic meter (µg/m3)
Chart 51: Average Concentration of Benzene Over Time By Sample Station (MATES V Data 2018-2019)
Burbank Area Central L.A. Compton
Huntington Park Inland Valley San Bernardino Long Beach Pico Rivera Rubidoux West Long Beach
Regionwide Walnut Bluff

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 January February March April May June July August September October November December micrograms per cubic meter (µg/m3)
Chart 52: Comparison of Benzene Concentrations Detected at Walnut Bluff and MATES V
Long Beach Average Long Beach Minimum Long Beach Maximum MATES V (All Sites) Average MATES V (All Sites) Maximum MATES V (All Sites) Minimum WB Average WB Max WB Min
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
February 2025
Appendix A
Field Data Sheets

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
February 2025
Appendix B
Quality Assurance Evaluation of Laboratory Data

Laboratory Data Review Checklist
for Air and Soil Vapor Samples
Site Name:

Date:

Consultant Firm:

Completed By (Name):

Laboratory Name:

Laboratory Report Number:

Laboratory Report Date:

Walnut Bluff
12-11-2024
Catalyst Environmental Solutions
Yola Bayram
Enthalpy Analytical Laboratory
518235
10/22/24
Laboratory Data Review Checklist for Air and Soil Vapor Samples

Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

1. Laboratory
a. Did an ELAP or NELAPͲcertified laboratory receive and perform all of the submitted sample analyses?
YesտNoտN/AտComments:
b. If the samples were transferred to another “network” laboratory or subͲcontracted to an alternate laboratory, was the laboratory performing the analyses ELAP or NELAPͲcertified? YesտNoտN/AտComments:

2. Chain of Custody (CoC)
a. CoC information completed, signed, and dated (including released/received by)? YesտNoտN/AտComments:
b. Correct analyses requested per approved Work Plan?
YesտNoտN/AտComments:

3. Laboratory Sample Receipt Documentation
a. Sample condition documented? (e.g., Samples collected in gas tight, opaque/dark Summa canisters or other appropriate container? Canister vacuum/pressure checked, recorded upon receipt and contained no open valves?)
YesտNoտN/AտComments:
b. If sample condition compromised, is Data quality or usability affected? Laboratory Report EƵŵďĞƌ:
518235
10/22/24
Laboratory Data Review Checklist for Air and Soil Vapor Samples

4. Case Narrative
a. Present and understandable?
YesտNoտN/AտComments:
b. Discrepancies, errors, and Lab QC failures identified by the lab? YesտNoտN/AտIf Yes, describe errors. Comments:
c. Does Lab describe corrective actions implemented?
YesտNoտN/AտIf Yes, describe corrective actions. Comments:
d. Described impact to data quality/usability according to the case narrative.

5. Samples Results
a. Correct analyses performed/reported as requested on COC? YesտNoտN/AտComments:
b. All applicable holding times met?
YesտNoտN/AտComments:

Laboratory Report Date:

Laboratory Report EƵŵďĞƌ: Provide ĂŶexplanation in comment box for any N/A or No box checked.
c. Are the reported reporting limits (RLs) less than the data quality objectivesor screening level for the project, as defined in the approved work plan?
YesտNoտN/AտComments:
518235
10/22/24
No issues encountered
See attached. none of the analytes are related to petroleum hydrocarbons Laboratory Data Review Checklist for Air and Soil Vapor Samples

d. Did Lab dilute the samples?
YesտNoտN/AտComments:
e. Describe impact to data quality or usability.:

6. Lab QC Samples
a. Lab Method Blank
i. One method blank reported per matrix, analysis and 20 samples? YesտNoտN/AտComments:
ii. All method blank results less than RL, Lab QA/QC criteria, and project specified objectives? YesտNoտN/AտComments:
iii. Describe impact to data quality from Method Blank results. b. Laboratory Control Sample/Duplicate (LCS/LCSD)
i. Organics – One LCS/LCSD reported per matrix, analysis, and 20 samples? YesտNoտN/AտComments:
ii. Accuracy – All percent recoveries (%R) reported and within method or laboratory limits and Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
project specified objectives, if applicable?
YesտNoտN/AտComments:
518235
10/22/24
no impact
None
Laboratory Data Review Checklist for Air and Soil Vapor Samples

iii. Precision – All relative percent differences (RPD) reported and less than method or laboratory limits and project specified objectives, if applicable? YesտNoտN/AտComments:
iv. If %R or RPD is outside acceptable limits, what samples are affected?:
v. Do the affected sample(s) have data flags? If so, are the data flags clearly defined? YesտNoտN/AտComments:
vii. Describe impact to data quality or usability fromLCS/LCSD results?:
c. Lab Surrogates – VOCs only
i. Are surrogate recoveries reported for VOC analyses – field, QC and laboratory samples? YesտNoտN/AտComments:
ii. Accuracy – All percent recoveries (%R) reported and within method or laboratory limits and project specified objectives, if applicable?
YesտNoտN/AտComments:
iii. Describe impacts to data quality or usability from VOC surrogate data? Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
518235
10/22/24
Laboratory Data Review Checklist for Air and Soil Vapor Samples

7. Field QC Samples
a. Field Duplicate
i. Field duplicate submitted per matrix, analysis, and approved Work Plan? YesտNoտN/AտComments:
ii. Submitted blind to lab?
YesտNoտN/AտComments:
iii. Precision – All relative percent differences (RPD) less than specified project objectives? (Recommended: 30% air and soil vapor)
RPD (%) = Absolute value of: (R1ͲR2)
((R1+R2)/2)
Where R1 = Sample Concentration
R2 = Field Duplicate Concentration
YesտNoտN/AտComments:
iv. Describe impact to data quality or usability from Field Duplicate data.:
b. Field Blank (If not applicable, a comment stating why must be entered below)? Yes܆NoտN/AտComments:
i. Describe impact to data quality or usability from Field Blank results?:
x 100
Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
518235
10/22/24
No field duplicate
no field blank submitted per work plan
Laboratory Data Review Checklist for Air and Soil Vapor Samples

b. Do the affected sample(s) have appropriate data flags? YesտNoտN/AտComments:

8. Data Flags/Qualifiers
a. Are the flags clearly defined and appropriate?
YesտNoտN/AտComments:

Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
518235
10/22/24
518235
Sample ID Units dtscC dtscNC RSLc RSLnc WB01-14D WB02-14D WB03-14D WB04-14D WB05-14D WB06-14D WB07-14D WB08-14D WB09-14D WB10-14D WB11-14D WB12-14D WB13-14D WB14-14D WB17-14D WB18-14D WB19-14D Sample Date 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 10/15/2024 Lab Sample ID 518235-001 518235-002 518235-003 518235-004 518235-005 518235-006 518235-007 518235-008 518235-009 518235-010 518235-011 518235-012 518235-013 518235-014 518235-015 518235-016 518235-017 1,1,1,2-Tetrachloroethane ug/m3 0.38 130 0.38 -- 0.076 0.069 0.069 0.069 0.082 0.069 0.069 0.076 0.069 0.069 0.069 0.069 0.076 0.069 0.076 0.082 0.076 1,1,1-Trichloroethane ug/m3 -- 1000 -- 5200 0.06 0.055 0.055 0.055 0.065 0.055 0.055 0.06 0.055 0.055 0.055 0.055 0.06 0.055 0.06 0.065 0.06 1,1,2,2-Tetrachloroethane ug/m3 0.048 83 0.048 -- 0.076 0.069 0.069 0.069 0.082 0.069 0.069 0.076 0.069 0.069 0.069 0.069 0.076 0.069 0.076 0.082 0.076 1,1,2-Trichloroethane ug/m3 -- -- 0.18 0.21 0.06 0.055 0.055 0.055 0.065 0.055 0.055 0.06 0.055 0.055 0.055 0.055 0.06 0.055 0.06 0.065 0.06 1,1-Dichloroethane ug/m3 1.8 830 1.8 -- 0.045 0.04 0.04 0.04 0.049 0.04 0.04 0.045 0.04 0.04 0.04 0.04 0.045 0.04 0.045 0.049 0.045 1,1-Dichloroethene ug/m3 -- 73 -- 4.1 0.044 0.04 0.04 0.04 0.048 0.04 0.04 0.044 0.04 0.04 0.04 0.04 0.044 0.04 0.044 0.048 0.044 1,2,4-Trichlorobenzene ug/m3 0.38 2.1 -- 2.1 0.082 0.074 0.074 0.074 0.089 0.074 0.074 0.082 0.074 0.074 0.074 0.074 0.082 0.074 0.082 0.089 0.082 1,2,4-Trimethylbenzene ug/m3 -- -- -- 63 0.3 0.37 0.24 0.29 0.29 0.26 0.29 0.27 0.29 0.5 0.3 0.32 0.35 0.27 0.33 0.44 0.3 1,2-Dibromoethane ug/m3 -- 0.83 0.0047 9.4 0.085 0.077 0.077 0.077 0.092 0.077 0.077 0.085 0.077 0.077 0.077 0.077 0.085 0.077 0.085 0.092 0.085 1,2-Dichlorobenzene ug/m3 -- -- -- 210 0.066 0.06 0.06 0.06 0.072 0.06 0.06 0.066 0.06 0.06 0.06 0.06 0.066 0.06 0.066 0.072 0.066 1,2-Dichloroethane ug/m3 -- -- 0.11 7.3 0.063 0.066 0.062 0.062 0.061 0.062 0.061 0.062 0.063 0.072 0.061 0.062 0.065 0.063 0.062 0.062 0.067 1,2-Dichloropropane ug/m3 -- -- 0.76 4.2 0.051 0.046 0.046 0.046 0.055 0.046 0.046 0.051 0.046 0.046 0.046 0.046 0.051 0.046 0.051 0.055 0.051 1,3,5-Trimethylbenzene ug/m3 -- -- -- 63 0.074 0.1 0.055 0.065 0.074 0.065 0.065 0.061 0.068 0.14 0.073 0.074 0.085 0.067 0.085 0.11 0.081 1,3-Dichlorobenzene ug/m3 -- -- -- -- 0.066 0.06 0.06 0.06 0.072 0.06 0.06 0.066 0.06 0.06 0.06 0.06 0.066 0.06 0.066 0.072 0.066 1,4-Dichlorobenzene ug/m3 -- -- 0.26 830 0.066 0.06 0.06 0.06 0.072 0.06 0.06 0.066 0.06 0.06 0.06 0.06 0.066 0.06 0.066 0.072 0.066 2-Chlorotoluene ug/m3 -- 83 -- -- 0.057 0.052 0.052 0.052 0.062 0.052 0.052 0.057 0.052 0.052 0.052 0.052 0.057 0.052 0.057 0.062 0.057 Benzene ug/m3 0.097 3.1 0.36 31 0.8 0.83 0.72 0.74 3.2 0.74 0.72 0.74 0.81 0.99 0.78 0.85 0.89 0.78 0.82 0.79 1 Benzyl chloride ug/m3 -- -- 0.057 1 0.057 0.052 0.052 0.052 0.062 0.052 0.052 0.057 0.052 0.052 0.052 0.052 0.057 0.052 0.057 0.062 0.057 Bromodichloromethane ug/m3 0.076 83 0.076 -- 0.074 0.067 0.067 0.067 0.08 0.067 0.067 0.074 0.067 0.067 0.067 0.067 0.074 0.067 0.074 0.08 0.074 Bromoform ug/m3 2.6 83 2.6 -- 0.11 0.1 0.1 0.1 0.12 0.1 0.1 0.11 0.1 0.1 0.1 0.1 0.11 0.1 0.11 0.12 0.11 Bromomethane ug/m3 -- -- -- 5.2 0.08 0.084 0.082 0.075 0.084 0.081 0.085 0.08 0.092 0.083 0.089 0.081 0.083 0.085 0.084 0.11 0.08 Carbon Tetrachloride ug/m3 0.47 42 0.47 100 0.46 0.45 0.47 0.47 0.46 0.47 0.46 0.47 0.47 0.46 0.47 0.46 0.46 0.46 0.46 0.47 0.45 Chlorobenzene ug/m3 -- -- -- 52 0.051 0.046 0.046 0.046 0.055 0.046 0.046 0.051 0.046 0.046 0.046 0.046 0.051 0.046 0.051 0.055 0.051 Chloroethane ug/m3 -- -- -- 4200 0.029 0.049 0.026 0.026 0.032 0.045 0.088 0.058 0.042 0.026 0.089 0.1 0.029 0.026 0.032 0.035 0.069 Chloroform ug/m3 -- -- 0.12 2 0.14 0.16 0.17 0.16 0.16 0.15 0.14 0.14 0.18 0.15 0.14 0.14 0.17 0.13 0.14 0.14 0.13 Chloromethane ug/m3 -- -- -- 94 0.99 0.99 1 1 1 1 0.99 1 1 0.98 1 1 1 1 1 1.1 1 Dibromochloromethane ug/m3 0.13 83 -- -- 0.094 0.085 0.085 0.085 0.1 0.085 0.085 0.094 0.085 0.085 0.085 0.085 0.094 0.085 0.094 0.1 0.094 Ethylbenzene ug/m3 -- -- 1.1 1000 0.27 0.33 0.25 0.26 0.26 0.28 0.26 0.26 0.27 0.45 0.27 0.29 0.31 0.26 0.3 0.3 0.31 Freon 113 ug/m3 -- -- -- 5200 0.46 0.44 0.47 0.47 0.46 0.46 0.46 0.47 0.47 0.46 0.47 0.46 0.46 0.46 0.46 0.47 0.45 Freon 114 ug/m3 -- -- -- -- 0.11 0.12 0.12 0.12 0.11 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.11 0.11 0.11 0.12 0.11 Freon 12 ug/m3 -- -- -- 100 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.4 2.3 Hexachlorobutadiene ug/m3 0.13 4.2 0.13 -- 0.12 0.11 0.11 0.11 0.13 0.11 0.11 0.12 0.11 0.11 0.11 0.11 0.12 0.11 0.12 0.13 0.12 Methylene Chloride ug/m3 1 420 100 630 0.55 0.6 0.59 1.2 0.76 0.62 0.67 0.74 2.8 0.85 0.57 0.57 0.6 0.59 0.53 0.56 0.5 Naphthalene ug/m3 -- -- 0.083 3.1 0.059 0.077 0.052 0.052 0.074 0.052 0.059 0.058 0.078 0.14 0.086 0.059 0.12 0.057 0.072 0.073 0.058 Styrene ug/m3 -- 940 -- 1000 0.1 0.12 0.076 0.11 0.13 0.11 0.12 0.099 0.12 0.13 0.13 0.14 0.32 0.086 0.13 0.13 0.18 Tetrachloroethene ug/m3 0.46 42 11 42 0.075 0.068 0.068 0.068 0.081 0.068 0.068 0.075 0.068 0.068 0.068 0.068 0.08 0.068 0.075 0.081 0.075 Toluene ug/m3 -- 310 -- 5200 1.4 1.5 1.2 1.4 5.8 1.6 1.5 1.5 1.6 1.3 1.6 1.9 2 1.3 1.7 1.7 1.8 Trichloroethene ug/m3 -- -- 0.48 2.1 0.059 0.054 0.054 0.054 0.064 0.054 0.054 0.059 0.054 0.054 0.054 0.054 0.059 0.054 0.059 0.064 0.059 Trichlorofluoromethane ug/m3 -- 1300 -- -- 1.1 1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 Vinyl Chloride ug/m3 0.0095 100 0.17 53 0.028 0.026 0.026 0.026 0.031 0.026 0.026 0.028 0.026 0.026 0.026 0.026 0.028 0.026 0.028 0.031 0.028 Vinyl bromide ug/m3 -- -- 0.19 3.1 0.048 0.044 0.044 0.044 0.052 0.044 0.044 0.048 0.044 0.044 0.044 0.044 0.048 0.044 0.048 0.052 0.048 Xylene (total) ug/m3 -- -- -- 100 1.1 1.3 0.99 1.1 1 1 0.99 0.98 1.1 1.5 1.1 1.2 1.3 1.1 1.2 1.2 1.3 cis-1,2-Dichloroethene ug/m3 -- 8.3 -- 42 0.044 0.04 0.04 0.04 0.048 0.04 0.04 0.044 0.04 0.04 0.04 0.04 0.044 0.04 0.044 0.048 0.044 cis-1,3-Dichloropropene ug/m3 -- -- -- -- 0.05 0.045 0.045 0.045 0.054 0.045 0.045 0.05 0.045 0.045 0.045 0.045 0.05 0.045 0.05 0.054 0.05 m,p-Xylenes ug/m3 -- -- -- 100 0.79 0.9 0.71 0.76 0.73 0.74 0.71 0.7 0.79 1.2 0.78 0.83 0.94 0.75 0.89 0.88 0.95 o-Xylene ug/m3 -- -- -- 100 0.32 0.35 0.28 0.3 0.29 0.29 0.28 0.28 0.31 0.37 0.31 0.33 0.37 0.3 0.35 0.35 0.37 trans-1,2-Dichloroethene ug/m3 -- 83 -- 42 0.044 0.04 0.04 0.04 0.048 0.04 0.04 0.044 0.04 0.04 0.04 0.04 0.044 0.04 0.044 0.048 0.044 trans-1,3-Dichloropropene ug/m3 -- -- -- -- 0.05 0.045 0.045 0.045 0.054 0.045 0.045 0.05 0.045 0.045 0.045 0.045 0.05 0.045 0.05 0.054 0.05

BOLD IS DETECTED

Laboratory Data Review Checklist
for Air and Soil Vapor Samples
Site Name:

Date:

Consultant Firm:

Completed By (Name):

Laboratory Name:

Laboratory Report Number:

Laboratory Report Date:

Walnut Bluff
2/14/2025
Catalyst Environmental Solutions
Yola Bayram
Enthalpy Analytical Laboratory
522442
12/23/24
Laboratory Data Review Checklist for Air and Soil Vapor Samples

Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

1. Laboratory
a. Did an ELAP or NELAPͲcertified laboratory receive and perform all of the submitted sample analyses?
YesտNoտN/AտComments:
b. If the samples were transferred to another “network” laboratory or subͲcontracted to an alternate laboratory, was the laboratory performing the analyses ELAP or NELAPͲcertified? YesտNoտN/AտComments:

2. Chain of Custody (CoC)
a. CoC information completed, signed, and dated (including released/received by)? YesտNoտN/AտComments:
b. Correct analyses requested per approved Work Plan?
YesտNoտN/AտComments:

3. Laboratory Sample Receipt Documentation
a. Sample condition documented? (e.g., Samples collected in gas tight, opaque/dark Summa canisters or other appropriate container? Canister vacuum/pressure checked, recorded upon receipt and contained no open valves?)
YesտNoտN/AտComments:
b. If sample condition compromised, is Data quality or usability affected? Laboratory Report EƵŵďĞƌ:
522442
12/23/24
Laboratory Data Review Checklist for Air and Soil Vapor Samples

4. Case Narrative
a. Present and understandable?
YesտNoտN/AտComments:
b. Discrepancies, errors, and Lab QC failures identified by the lab? YesտNoտN/AտIf Yes, describe errors. Comments:
c. Does Lab describe corrective actions implemented?
YesտNoտN/AտIf Yes, describe corrective actions. Comments:
d. Described impact to data quality/usability according to the case narrative.

5. Samples Results
a. Correct analyses performed/reported as requested on COC? YesտNoտN/AտComments:
b. All applicable holding times met?
YesտNoտN/AտComments:

Laboratory Report Date:

Laboratory Report EƵŵďĞƌ: Provide ĂŶexplanation in comment box for any N/A or No box checked.
c. Are the reported reporting limits (RLs) less than the data quality objectivesor screening level for the project, as defined in the approved work plan?
YesտNoտN/AտComments:
522442
12/23/24
No issues encountered
None of the analytes are related to petroleum hydrocarbons Laboratory Data Review Checklist for Air and Soil Vapor Samples

d. Did Lab dilute the samples?
YesտNoտN/AտComments:
e. Describe impact to data quality or usability.:

6. Lab QC Samples
a. Lab Method Blank
i. One method blank reported per matrix, analysis and 20 samples? YesտNoտN/AտComments:
ii. All method blank results less than RL, Lab QA/QC criteria, and project specified objectives? YesտNoտN/AտComments:
iii. Describe impact to data quality from Method Blank results. b. Laboratory Control Sample/Duplicate (LCS/LCSD)
i. Organics – One LCS/LCSD reported per matrix, analysis, and 20 samples? YesտNoտN/AտComments:
ii. Accuracy – All percent recoveries (%R) reported and within method or laboratory limits and Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
project specified objectives, if applicable?
YesտNoտN/AտComments:
522442
12/23/24
no impact
None
Laboratory Data Review Checklist for Air and Soil Vapor Samples

iii. Precision – All relative percent differences (RPD) reported and less than method or laboratory limits and project specified objectives, if applicable? YesտNoտN/AտComments:
iv. If %R or RPD is outside acceptable limits, what samples are affected?:
v. Do the affected sample(s) have data flags? If so, are the data flags clearly defined? YesտNoտN/AտComments:
vii. Describe impact to data quality or usability fromLCS/LCSD results?:
c. Lab Surrogates – VOCs only
i. Are surrogate recoveries reported for VOC analyses – field, QC and laboratory samples? YesտNoտN/AտComments:
ii. Accuracy – All percent recoveries (%R) reported and within method or laboratory limits and project specified objectives, if applicable?
YesտNoտN/AտComments:
iii. Describe impacts to data quality or usability from VOC surrogate data? Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
522442
12/23/24
Laboratory Data Review Checklist for Air and Soil Vapor Samples

7. Field QC Samples
a. Field Duplicate
i. Field duplicate submitted per matrix, analysis, and approved Work Plan? YesտNoտN/AտComments:
ii. Submitted blind to lab?
YesտNoտN/AտComments:
iii. Precision – All relative percent differences (RPD) less than specified project objectives? (Recommended: 30% air and soil vapor)
RPD (%) = Absolute value of: (R1ͲR2)
((R1+R2)/2)
Where R1 = Sample Concentration
R2 = Field Duplicate Concentration
YesտNoտN/AտComments:
iv. Describe impact to data quality or usability from Field Duplicate data.:
b. Field Blank (If not applicable, a comment stating why must be entered below)? Yes܆NoտN/AտComments:
i. Describe impact to data quality or usability from Field Blank results?:
x 100
Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
522442
12/23/24
No field duplicate
no field blank submitted per work plan
Laboratory Data Review Checklist for Air and Soil Vapor Samples

b. Do the affected sample(s) have appropriate data flags? YesտNoտN/AտComments:

8. Data Flags/Qualifiers
a. Are the flags clearly defined and appropriate?
YesտNoտN/AտComments:

Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
522442
12/23/24

Laboratory Data Review Checklist
for Air and Soil Vapor Samples
Site Name:

Date:

Consultant Firm:

Completed By (Name):

Laboratory Name:

Laboratory Report Number:

Laboratory Report Date:

Walnut Bluff
12-11-2024
Catalyst Environmental Solutions
Yola Bayram
Enthalpy Analytical Laboratory
2416404
11/11/2024
Laboratory Data Review Checklist for Air and Soil Vapor Samples

Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

1. Laboratory
a. Did an ELAP or NELAPͲcertified laboratory receive and perform all of the submitted sample analyses?
YesտNoտN/AտComments:
b. If the samples were transferred to another “network” laboratory or subͲcontracted to an alternate laboratory, was the laboratory performing the analyses ELAP or NELAPͲcertified? YesտNoտN/AտComments:

2. Chain of Custody (CoC)
a. CoC information completed, signed, and dated (including released/received by)? YesտNoտN/AտComments:
b. Correct analyses requested per approved Work Plan?
YesտNoտN/AտComments:

3. Laboratory Sample Receipt Documentation
a. Sample condition documented? (e.g., Samples collected in gas tight, opaque/dark Summa canisters or other appropriate container? Canister vacuum/pressure checked, recorded upon receipt and contained no open valves?)
YesտNoտN/AտComments:
b. If sample condition compromised, is Data quality or usability affected? Laboratory Report EƵŵďĞƌ:
2416404
11/11/2024
WB07-1H was received fully evacuated and could not be analyzed.

Laboratory Data Review Checklist for Air and Soil Vapor Samples

4. Case Narrative
a. Present and understandable?
YesտNoտN/AտComments:
b. Discrepancies, errors, and Lab QC failures identified by the lab? YesտNoտN/AտIf Yes, describe errors. Comments:
c. Does Lab describe corrective actions implemented?
YesտNoտN/AտIf Yes, describe corrective actions. Comments:
d. Described impact to data quality/usability according to the case narrative.

5. Samples Results
a. Correct analyses performed/reported as requested on COC? YesտNoտN/AտComments:
b. All applicable holding times met?
YesտNoտN/AտComments:

Laboratory Report Date:

Laboratory Report EƵŵďĞƌ: Provide ĂŶexplanation in comment box for any N/A or No box checked.
c. Are the reported reporting limits (RLs) less than the data quality objectivesor screening level for the project, as defined in the approved work plan?
YesտNoտN/AտComments:
2416404
11/11/2024
WB07-1H was received fully evacuated and could not be analyzed See attached.benzene and naphtalene had detections and are not affected. all others are non-petroleum hydrocarbons Laboratory Data Review Checklist for Air and Soil Vapor Samples

d. Did Lab dilute the samples?
YesտNoտN/AտComments:
e. Describe impact to data quality or usability.:

6. Lab QC Samples
a. Lab Method Blank
i. One method blank reported per matrix, analysis and 20 samples? YesտNoտN/AտComments:
ii. All method blank results less than RL, Lab QA/QC criteria, and project specified objectives? YesտNoտN/AտComments:
iii. Describe impact to data quality from Method Blank results. b. Laboratory Control Sample/Duplicate (LCS/LCSD)
i. Organics – One LCS/LCSD reported per matrix, analysis, and 20 samples? YesտNoտN/AտComments:
ii. Accuracy – All percent recoveries (%R) reported and within method or laboratory limits and Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
project specified objectives, if applicable?
YesտNoտN/AտComments:
2416404
11/11/2024
no impact
None
Laboratory Data Review Checklist for Air and Soil Vapor Samples

iii. Precision – All relative percent differences (RPD) reported and less than method or laboratory limits and project specified objectives, if applicable? YesտNoտN/AտComments:
iv. If %R or RPD is outside acceptable limits, what samples are affected?:
v. Do the affected sample(s) have data flags? If so, are the data flags clearly defined? YesտNoտN/AտComments:
vii. Describe impact to data quality or usability fromLCS/LCSD results?:
c. Lab Surrogates – VOCs only
i. Are surrogate recoveries reported for VOC analyses – field, QC and laboratory samples? YesտNoտN/AտComments:
ii. Accuracy – All percent recoveries (%R) reported and within method or laboratory limits and project specified objectives, if applicable?
YesտNoտN/AտComments:
iii. Describe impacts to data quality or usability from VOC surrogate data? Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
2416404
11/11/2024
Laboratory Data Review Checklist for Air and Soil Vapor Samples

7. Field QC Samples
a. Field Duplicate
i. Field duplicate submitted per matrix, analysis, and approved Work Plan? YesտNoտN/AտComments:
ii. Submitted blind to lab?
YesտNoտN/AտComments:
iii. Precision – All relative percent differences (RPD) less than specified project objectives? (Recommended: 30% air and soil vapor)
RPD (%) = Absolute value of: (R1ͲR2)
((R1+R2)/2)
Where R1 = Sample Concentration
R2 = Field Duplicate Concentration
YesտNoտN/AտComments:
iv. Describe impact to data quality or usability from Field Duplicate data.:
b. Field Blank (If not applicable, a comment stating why must be entered below)? Yes܆NoտN/AտComments:
i. Describe impact to data quality or usability from Field Blank results?:
x 100
Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
2416404
11/11/2024
No field duplicate
no field blank submitted per work plan
Laboratory Data Review Checklist for Air and Soil Vapor Samples

b. Do the affected sample(s) have appropriate data flags? YesտNoտN/AտComments:

8. Data Flags/Qualifiers
a. Are the flags clearly defined and appropriate?
YesտNoտN/AտComments:

Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
2416404
11/11/2024
ANALYTE dtscC dtscNC RSLc RSLnc UNITS WB01 WB02 WB03 WB04 WB05 WB06 WB07 WB08 WB09 WB10 WB11 WB12 WB13 WB14 WB17 WB18 1,1,1-Trichloroethane -- 1000 -- 5200 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1,1,2-Trichloro-1,2,2-trifluoroethane -- -- -- 5200 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1,1,2-Trichloroethane -- -- 0.18 0.21 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1,1-Dichloroethane 1.8 830 1.8 -- ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 1,1-Dichloroethene -- 73 -- 4.1 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 1,1-Difluoroethane -- -- -- -- ug/m3 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 1,2-Dibromoethane -- 0.83 0.0047 9.4 ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 1,2-Dichlorobenzene -- -- -- 210 ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 1,2-Dichloroethane -- -- 0.11 7.3 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1,3-Dichlorobenzene -- -- -- -- ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 1,4-Dichlorobenzene -- -- 0.26 830 ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Benzene 0.097 3.1 0.36 31 ug/m3 0.5 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Benzyl chloride -- -- 0.057 1 ug/m3 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Carbon tetrachloride 0.47 42 0.47 100 ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Chlorobenzene -- -- -- 52 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Chloroform -- -- 0.12 2 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 cis-1,2-Dichloroethene -- 8.3 -- 42 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Dichlorodifluoromethane -- -- -- 100 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Ethylbenzene -- -- 1.1 1000 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Naphthalene -- -- 0.083 3.1 ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 o-Xylene -- -- -- 100 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 p- & m-Xylenes -- -- -- 100 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Tetrachloroethene 0.46 42 11 42 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Toluene -- 310 -- 5200 ug/m3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Total Xylenes -- -- -- 100 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 trans-1,2-Dichloroethene -- 83 -- 42 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 trans-1,3-Dichloropropene -- -- -- -- ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Trichloroethene -- -- 0.48 2.1 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Trichlorofluoromethane -- 1300 -- -- ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Vinyl chloride 0.0095 100 0.17 53 ug/m3 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02

Laboratory Data Review Checklist
for Air and Soil Vapor Samples
Site Name:

Date:

Consultant Firm:

Completed By (Name):

Laboratory Name:

Laboratory Report Number:

Laboratory Report Date:

Walnut Bluff
12-11-2024
Catalyst Environmental Solutions
Yola Bayram
Enthalpy Analytical Laboratory
2416470
11/11/2024
Laboratory Data Review Checklist for Air and Soil Vapor Samples

Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

1. Laboratory
a. Did an ELAP or NELAPͲcertified laboratory receive and perform all of the submitted sample analyses?
YesտNoտN/AտComments:
b. If the samples were transferred to another “network” laboratory or subͲcontracted to an alternate laboratory, was the laboratory performing the analyses ELAP or NELAPͲcertified? YesտNoտN/AտComments:

2. Chain of Custody (CoC)
a. CoC information completed, signed, and dated (including released/received by)? YesտNoտN/AտComments:
b. Correct analyses requested per approved Work Plan?
YesտNoտN/AտComments:

3. Laboratory Sample Receipt Documentation
a. Sample condition documented? (e.g., Samples collected in gas tight, opaque/dark Summa canisters or other appropriate container? Canister vacuum/pressure checked, recorded upon receipt and contained no open valves?)
YesտNoտN/AտComments:
b. If sample condition compromised, is Data quality or usability affected? Laboratory Report EƵŵďĞƌ:
2416470
11/11/2024
Laboratory Data Review Checklist for Air and Soil Vapor Samples

4. Case Narrative
a. Present and understandable?
YesտNoտN/AտComments:
b. Discrepancies, errors, and Lab QC failures identified by the lab? YesտNoտN/AտIf Yes, describe errors. Comments:
c. Does Lab describe corrective actions implemented?
YesտNoտN/AտIf Yes, describe corrective actions. Comments:
d. Described impact to data quality/usability according to the case narrative.

5. Samples Results
a. Correct analyses performed/reported as requested on COC? YesտNoտN/AտComments:
b. All applicable holding times met?
YesտNoտN/AտComments:

Laboratory Report Date:

Laboratory Report EƵŵďĞƌ: Provide ĂŶexplanation in comment box for any N/A or No box checked.
c. Are the reported reporting limits (RLs) less than the data quality objectivesor screening level for the project, as defined in the approved work plan?
YesտNoտN/AտComments:
2416470
11/11/2024
No issues noted
See attached.benzene and naphtalene had detections and are not affected. all others are non-petroleum hydrocarbons Laboratory Data Review Checklist for Air and Soil Vapor Samples

d. Did Lab dilute the samples?
YesտNoտN/AտComments:
e. Describe impact to data quality or usability.:

6. Lab QC Samples
a. Lab Method Blank
i. One method blank reported per matrix, analysis and 20 samples? YesտNoտN/AտComments:
ii. All method blank results less than RL, Lab QA/QC criteria, and project specified objectives? YesտNoտN/AտComments:
iii. Describe impact to data quality from Method Blank results. b. Laboratory Control Sample/Duplicate (LCS/LCSD)
i. Organics – One LCS/LCSD reported per matrix, analysis, and 20 samples? YesտNoտN/AտComments:
ii. Accuracy – All percent recoveries (%R) reported and within method or laboratory limits and Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
project specified objectives, if applicable?
YesտNoտN/AտComments:
2416470
11/11/2024
no impact
None
Laboratory Data Review Checklist for Air and Soil Vapor Samples

iii. Precision – All relative percent differences (RPD) reported and less than method or laboratory limits and project specified objectives, if applicable? YesտNoտN/AտComments:
iv. If %R or RPD is outside acceptable limits, what samples are affected?:
v. Do the affected sample(s) have data flags? If so, are the data flags clearly defined? YesտNoտN/AտComments:
vii. Describe impact to data quality or usability fromLCS/LCSD results?:
c. Lab Surrogates – VOCs only
i. Are surrogate recoveries reported for VOC analyses – field, QC and laboratory samples? YesտNoտN/AտComments:
ii. Accuracy – All percent recoveries (%R) reported and within method or laboratory limits and project specified objectives, if applicable?
YesտNoտN/AտComments:
iii. Describe impacts to data quality or usability from VOC surrogate data? Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
2416470
11/11/2024
Laboratory Data Review Checklist for Air and Soil Vapor Samples

7. Field QC Samples
a. Field Duplicate
i. Field duplicate submitted per matrix, analysis, and approved Work Plan? YesտNoտN/AտComments:
ii. Submitted blind to lab?
YesտNoտN/AտComments:
iii. Precision – All relative percent differences (RPD) less than specified project objectives? (Recommended: 30% air and soil vapor)
RPD (%) = Absolute value of: (R1ͲR2)
((R1+R2)/2)
Where R1 = Sample Concentration
R2 = Field Duplicate Concentration
YesտNoտN/AտComments:
iv. Describe impact to data quality or usability from Field Duplicate data.:
b. Field Blank (If not applicable, a comment stating why must be entered below)? Yes܆NoտN/AտComments:
i. Describe impact to data quality or usability from Field Blank results?:
x 100
Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
2416470
11/11/2024
No field duplicate
no field blank submitted per work plan
Laboratory Data Review Checklist for Air and Soil Vapor Samples

b. Do the affected sample(s) have appropriate data flags? YesտNoտN/AտComments:

8. Data Flags/Qualifiers
a. Are the flags clearly defined and appropriate?
YesտNoտN/AտComments:

Laboratory Report Date:

Provide ĂŶexplanation in comment box
for any N/A or No box checked.

Laboratory Report EƵŵďĞƌ:
2416470
11/11/2024
ANALYTE dtscC dtscNC RSLc RSLnc UNITS WB01 WB02 WB03 WB04 WB05 WB06 WB07 WB08 WB09 WB10 WB11 WB12 WB13 WB14 WB17 WB18 1,1,1-Trichloroethane -- 1000 -- 5200 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1,1,2-Trichloro-1,2,2-trifluoroethane -- -- -- 5200 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1,1,2-Trichloroethane -- -- 0.18 0.21 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1,1-Dichloroethane 1.8 830 1.8 -- ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 1,1-Dichloroethene -- 73 -- 4.1 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 1,1-Difluoroethane -- -- -- -- ug/m3 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 1,2-Dibromoethane -- 0.83 0.0047 9.4 ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 1,2-Dichlorobenzene -- -- -- 210 ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 1,2-Dichloroethane -- -- 0.11 7.3 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1,3-Dichlorobenzene -- -- -- -- ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 1,4-Dichlorobenzene -- -- 0.26 830 ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Benzene 0.097 3.1 0.36 31 ug/m3 0.5 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Benzyl chloride -- -- 0.057 1 ug/m3 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Carbon tetrachloride 0.47 42 0.47 100 ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Chlorobenzene -- -- -- 52 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Chloroform -- -- 0.12 2 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 cis-1,2-Dichloroethene -- 8.3 -- 42 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Dichlorodifluoromethane -- -- -- 100 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Ethylbenzene -- -- 1.1 1000 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Naphthalene -- -- 0.083 3.1 ug/m3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 o-Xylene -- -- -- 100 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 p- & m-Xylenes -- -- -- 100 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Tetrachloroethene 0.46 42 11 42 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Toluene -- 310 -- 5200 ug/m3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Total Xylenes -- -- -- 100 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 trans-1,2-Dichloroethene -- 83 -- 42 ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 trans-1,3-Dichloropropene -- -- -- -- ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Trichloroethene -- -- 0.48 2.1 ug/m3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Trichlorofluoromethane -- 1300 -- -- ug/m3 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Vinyl chloride 0.0095 100 0.17 53 ug/m3 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
February 2025
Appendix C
Dixon’s Outlier Test for Benzene
Outlier Tests for Selected Uncensored Variables
User Selected Options
Date/Time of Computation ProUCL 5.2 12/8/2024 7:01:51 AM From File WorkSheet.xls
Full Precision OFF
Dixon's Outlier Test for C0
Number of Observations = 14
10% critical value: 0.492
5% critical value: 0.546
1% critical value: 0.641

1. Observation Value 3.2 is a Potential Outlier (Upper Tail)? Test Statistic: 0.939
For 10% significance level, 3.2 is an outlier.

For 5% significance level, 3.2 is an outlier.

For 1% significance level, 3.2 is an outlier.

ProUCL Dixon's Outlier Test Bezene
Proposed Walnut Bluff Development
Outlier Tests for Selected Uncensored Variables
User Selected Options
Date/Time of Computation ProUCL 5.2 12/8/2024 7:01:51 AM From File WorkSheet.xls
Full Precision OFF
Dixon's Outlier Test for C0
Number of Observations = 14
10% critical value: 0.492
5% critical value: 0.546
1% critical value: 0.641

1. Observation Value 5.8 is a Potential Outlier (Upper Tail)? Test Statistic: 0.867
For 10% significance level, 5.8 is an outlier.

For 5% significance level, 5.8 is an outlier.

For 1% significance level, 5.8 is an outlier.

ProUCL Dixon's Outlier Test Toluene
Proposed Walnut Bluff Development
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
February 2025
Appendix D
Assessment Of Potential Human Health Risks
ProUCL Outputs
UCL Statistics for Data Sets with Non-Detects
User Selected Options
Date/Time of Computation ProUCL 5.2 10/23/2024 12:00:19 PM From File 14D-ProUCLinput.xls
Full Precision OFF
Confidence Coefficient 95%
Number of Bootstrap Operation 2000
1,2,4-Trimethylbenzene
General Statistics
Total Number of Observations 14 Number of Distinct Observations 9 Number of Missing Observations 0
Minimum 0.24 Mean 0.31
Maximum 0.5 Median 0.29
SD 0.0643 Std. Error of Mean 0.0172
Coefficient of Variation 0.208 Skewness 2.194
Normal GOF Test
Shapiro Wilk Test Statistic 0.771 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.276 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.34 95% Adjusted-CLT UCL (Chen-1995) 0.349 95% Modified-t UCL (Johnson-1978) 0.342
Appendix D
ProUCL Output for 95% UCLs
Proposed Walnut Bluff Development
Gamma GOF Test
A-D Test Statistic 0.923 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.734 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.262 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 30.29 k star (bias corrected MLE) 23.84
Theta hat (MLE) 0.0102 Theta star (bias corrected MLE) 0.013 nu hat (MLE) 848 nu star (bias corrected) 667.6
MLE Mean (bias corrected) 0.31 MLE Sd (bias corrected) 0.0635 Approximate Chi Square Value (0.05) 608.7
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 601.2 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.34 95% Adjusted Gamma UCL 0.344 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.855 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.25 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -1.427 Mean of logged Data -1.188 Maximum of Logged Data -0.693 SD of logged Data 0.181
Assuming Lognormal Distribution
95% H-UCL 0.339 90% Chebyshev (MVUE) UCL 0.355
95% Chebyshev (MVUE) UCL 0.375 97.5% Chebyshev (MVUE) UCL 0.404 99% Chebyshev (MVUE) UCL 0.459
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.338 95% BCA Bootstrap UCL 0.349
95% Standard Bootstrap UCL 0.338 95% Bootstrap-t UCL 0.365 95% Hall's Bootstrap UCL 0.472 95% Percentile Bootstrap UCL 0.34 90% Chebyshev(Mean, Sd) UCL 0.362 95% Chebyshev(Mean, Sd) UCL 0.385

97.5% Chebyshev(Mean, Sd) UCL 0.417 99% Chebyshev(Mean, Sd) UCL 0.481 Suggested UCL to Use
95% Student's-t UCL 0.34
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician. 1,2-Dichloroethane
General Statistics
Total Number of Observations 14 Number of Distinct Observations 6 Number of Missing Observations 0
Minimum 0.061 Mean 0.0632
Maximum 0.072 Median 0.062
SD 0.00291 Std. Error of Mean 7.79E-04
Coefficient of Variation 0.0461 Skewness 2.409
Normal GOF Test
Shapiro Wilk Test Statistic 0.701 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.315 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.0646 95% Adjusted-CLT UCL (Chen-1995) 0.065 95% Modified-t UCL (Johnson-1978) 0.0647
Gamma GOF Test
A-D Test Statistic 1.49 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.311 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 537.9 k star (bias corrected MLE) 422.7
Theta hat (MLE) 1.18E-04 Theta star (bias corrected MLE) 1.50E-04 nu hat (MLE) 15060 nu star (bias corrected) 11834
MLE Mean (bias corrected) 0.0632 MLE Sd (bias corrected) 0.00307 Approximate Chi Square Value (0.05) 11582
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 11549 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.0646 95% Adjusted Gamma UCL 0.0648 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.719 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.308 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -2.797 Mean of logged Data -2.762 Maximum of Logged Data -2.631 SD of logged Data 0.0441
Assuming Lognormal Distribution
95% H-UCL N/A 90% Chebyshev (MVUE) UCL 0.0654
95% Chebyshev (MVUE) UCL 0.0665 97.5% Chebyshev (MVUE) UCL 0.0679 99% Chebyshev (MVUE) UCL 0.0706
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.0645 95% BCA Bootstrap UCL 0.0649
95% Standard Bootstrap UCL 0.0645 95% Bootstrap-t UCL 0.0662 95% Hall's Bootstrap UCL 0.0698 95% Percentile Bootstrap UCL 0.0646 90% Chebyshev(Mean, Sd) UCL 0.0656 95% Chebyshev(Mean, Sd) UCL 0.0666

97.5% Chebyshev(Mean, Sd) UCL 0.0681 99% Chebyshev(Mean, Sd) UCL 0.071 Suggested UCL to Use
95% Student's-t UCL 0.0646
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician. 1,3,5-Trimethylbenzene
General Statistics
Total Number of Observations 14 Number of Distinct Observations 10 Number of Missing Observations 0
Minimum 0.055 Mean 0.0761
Maximum 0.14 Median 0.0705
SD 0.0214 Std. Error of Mean 0.00572
Coefficient of Variation 0.281 Skewness 2.35
Normal GOF Test
Shapiro Wilk Test Statistic 0.729 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.326 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.0863 95% Adjusted-CLT UCL (Chen-1995) 0.0894 95% Modified-t UCL (Johnson-1978) 0.0869
Gamma GOF Test
A-D Test Statistic 1.104 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.734 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.302 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 17.71 k star (bias corrected MLE) 13.97
Theta hat (MLE) 0.0043 Theta star (bias corrected MLE) 0.00545 nu hat (MLE) 496 nu star (bias corrected) 391.1
MLE Mean (bias corrected) 0.0761 MLE Sd (bias corrected) 0.0204 Approximate Chi Square Value (0.05) 346.2
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 340.6 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.086 95% Adjusted Gamma UCL 0.0874 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.834 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.286 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -2.9 Mean of logged Data -2.604
Maximum of Logged Data -1.966 SD of logged Data 0.234
Assuming Lognormal Distribution
95% H-UCL 0.0857 90% Chebyshev (MVUE) UCL 0.0902
95% Chebyshev (MVUE) UCL 0.0967 97.5% Chebyshev (MVUE) UCL 0.106 99% Chebyshev (MVUE) UCL 0.123
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.0855 95% BCA Bootstrap UCL 0.0896
95% Standard Bootstrap UCL 0.0853 95% Bootstrap-t UCL 0.0993 95% Hall's Bootstrap UCL 0.132 95% Percentile Bootstrap UCL 0.0861 90% Chebyshev(Mean, Sd) UCL 0.0933 95% Chebyshev(Mean, Sd) UCL 0.101

97.5% Chebyshev(Mean, Sd) UCL 0.112 99% Chebyshev(Mean, Sd) UCL 0.133 Suggested UCL to Use
95% Student's-t UCL 0.0863
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Benzene
General Statistics
Total Number of Observations 13 Number of Distinct Observations 9 Number of Missing Observations 0
Minimum 0.72 Mean 0.799
Maximum 0.99 Median 0.78
SD 0.0775 Std. Error of Mean 0.0215
Coefficient of Variation 0.097 Skewness 1.315
Normal GOF Test
Shapiro Wilk Test Statistic 0.88 Shapiro Wilk GOF Test
1% Shapiro Wilk Critical Value 0.814 Data appear Normal at 1% Significance Level Lilliefors Test Statistic 0.162 Lilliefors GOF Test
1% Lilliefors Critical Value 0.271 Data appear Normal at 1% Significance Level Data appear Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.838 95% Adjusted-CLT UCL (Chen-1995) 0.843 95% Modified-t UCL (Johnson-1978) 0.839
Gamma GOF Test
A-D Test Statistic 0.477 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.732 Detected data appear Gamma Distributed at 5% Significance Level K-S Test Statistic 0.176 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.236 Detected data appear Gamma Distributed at 5% Significance Level Detected data appear Gamma Distributed at 5% Significance Level Gamma Statistics
k hat (MLE) 122.4 k star (bias corrected MLE) 94.22
Theta hat (MLE) 0.00653 Theta star (bias corrected MLE) 0.00848 nu hat (MLE) 3183 nu star (bias corrected) 2450
MLE Mean (bias corrected) 0.799 MLE Sd (bias corrected) 0.0823 Approximate Chi Square Value (0.05) 2336
Adjusted Level of Significance 0.0301 Adjusted Chi Square Value 2320 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.838 95% Adjusted Gamma UCL 0.844 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.903 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.889 Data appear Lognormal at 10% Significance Level Lilliefors Test Statistic 0.169 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.215 Data appear Lognormal at 10% Significance Level Data appear Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -0.329 Mean of logged Data -0.228 Maximum of Logged Data -0.0101 SD of logged Data 0.0928 Assuming Lognormal Distribution
95% H-UCL N/A 90% Chebyshev (MVUE) UCL 0.861
95% Chebyshev (MVUE) UCL 0.889 97.5% Chebyshev (MVUE) UCL 0.928 99% Chebyshev (MVUE) UCL 1.004
Nonparametric Distribution Free UCL Statistics
Data appear to follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.835 95% BCA Bootstrap UCL 0.843
95% Standard Bootstrap UCL 0.833 95% Bootstrap-t UCL 0.852 95% Hall's Bootstrap UCL 0.863 95% Percentile Bootstrap UCL 0.835 90% Chebyshev(Mean, Sd) UCL 0.864 95% Chebyshev(Mean, Sd) UCL 0.893

97.5% Chebyshev(Mean, Sd) UCL 0.933 99% Chebyshev(Mean, Sd) UCL 1.013 Suggested UCL to Use
95% Student's-t UCL 0.838
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Bromomethane
General Statistics
Total Number of Observations 14 Number of Distinct Observations 9 Number of Missing Observations 0
Minimum 0.075 Mean 0.0831
Maximum 0.092 Median 0.083
SD 0.00409 Std. Error of Mean 0.00109
Coefficient of Variation 0.0492 Skewness 0.375
Normal GOF Test
Shapiro Wilk Test Statistic 0.95 Shapiro Wilk GOF Test
1% Shapiro Wilk Critical Value 0.825 Data appear Normal at 1% Significance Level Lilliefors Test Statistic 0.182 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data appear Normal at 1% Significance Level Data appear Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.0851 95% Adjusted-CLT UCL (Chen-1995) 0.0851 95% Modified-t UCL (Johnson-1978) 0.0851
Gamma GOF Test
A-D Test Statistic 0.375 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Detected data appear Gamma Distributed at 5% Significance Level K-S Test Statistic 0.171 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Detected data appear Gamma Distributed at 5% Significance Level Detected data appear Gamma Distributed at 5% Significance Level Gamma Statistics
k hat (MLE) 447.7 k star (bias corrected MLE) 351.8
Theta hat (MLE) 1.86E-04 Theta star (bias corrected MLE) 2.36E-04 nu hat (MLE) 12534 nu star (bias corrected) 9850
MLE Mean (bias corrected) 0.0831 MLE Sd (bias corrected) 0.00443 Approximate Chi Square Value (0.05) 9620
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 9590 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.0851 95% Adjusted Gamma UCL 0.0854 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.954 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data appear Lognormal at 10% Significance Level Lilliefors Test Statistic 0.175 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data appear Lognormal at 10% Significance Level Data appear Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -2.59 Mean of logged Data -2.488 Maximum of Logged Data -2.386 SD of logged Data 0.049
Assuming Lognormal Distribution
95% H-UCL N/A 90% Chebyshev (MVUE) UCL 0.0864
95% Chebyshev (MVUE) UCL 0.0879 97.5% Chebyshev (MVUE) UCL 0.0899 99% Chebyshev (MVUE) UCL 0.094
Nonparametric Distribution Free UCL Statistics
Data appear to follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.0849 95% BCA Bootstrap UCL 0.085
95% Standard Bootstrap UCL 0.0849 95% Bootstrap-t UCL 0.0853 95% Hall's Bootstrap UCL 0.0857 95% Percentile Bootstrap UCL 0.0849 90% Chebyshev(Mean, Sd) UCL 0.0864 95% Chebyshev(Mean, Sd) UCL 0.0879

97.5% Chebyshev(Mean, Sd) UCL 0.09 99% Chebyshev(Mean, Sd) UCL 0.094 Suggested UCL to Use
95% Student's-t UCL 0.0851
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Carbon Tetrachloride
General Statistics
Total Number of Observations 14 Number of Distinct Observations 3 Number of Missing Observations 0
Minimum 0.45 Mean 0.464
Maximum 0.47 Median 0.46
SD 0.00633 Std. Error of Mean 0.00169
Coefficient of Variation 0.0137 Skewness -0.433
Normal GOF Test
Shapiro Wilk Test Statistic 0.771 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.285 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.467 95% Adjusted-CLT UCL (Chen-1995) 0.466 95% Modified-t UCL (Johnson-1978) 0.467
Gamma GOF Test
A-D Test Statistic 1.727 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.319 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 5749 k star (bias corrected MLE) 4517
Theta hat (MLE) 8.06E-05 Theta star (bias corrected MLE) 1.03E-04 nu hat (MLE) 160985 nu star (bias corrected) 126489
MLE Mean (bias corrected) 0.464 MLE Sd (bias corrected) 0.0069 Approximate Chi Square Value (0.05) 125663
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 125554 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.467 95% Adjusted Gamma UCL 0.467 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.771 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.283 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -0.799 Mean of logged Data -0.769 Maximum of Logged Data -0.755 SD of logged Data 0.0137
Assuming Lognormal Distribution
95% H-UCL N/A 90% Chebyshev (MVUE) UCL 0.469
95% Chebyshev (MVUE) UCL 0.471 97.5% Chebyshev (MVUE) UCL 0.474 99% Chebyshev (MVUE) UCL 0.48
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.466 95% BCA Bootstrap UCL N/A
95% Standard Bootstrap UCL N/A 95% Bootstrap-t UCL N/A
95% Hall's Bootstrap UCL N/A 95% Percentile Bootstrap UCL N/A 90% Chebyshev(Mean, Sd) UCL 0.469 95% Chebyshev(Mean, Sd) UCL 0.471

97.5% Chebyshev(Mean, Sd) UCL 0.474 99% Chebyshev(Mean, Sd) UCL 0.48 Suggested UCL to Use
95% Student's-t UCL 0.467
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Note: For highly negatively-skewed data, confidence limits (e.g., Chen, Johnson, Lognormal, and Gamma) may not be reliable. Chen's and Johnson's methods provide adjustments for positvely skewed data sets.

Chloroethane
General Statistics
Total Number of Observations 14 Number of Distinct Observations 10 Number of Detects 7 Number of Non-Detects 7
Number of Distinct Detects 7 Number of Distinct Non-Detects 3 Minimum Detect 0.042 Minimum Non-Detect 0.026
Maximum Detect 0.1 Maximum Non-Detect 0.032
Variance Detects 5.88E-04 Percent Non-Detects 50%
Mean Detects 0.0673 SD Detects 0.0242
Median Detects 0.058 CV Detects 0.36
Skewness Detects 0.327 Kurtosis Detects -2.259
Mean of Logged Detects -2.755 SD of Logged Detects 0.363 Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.856 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.73 Detected Data appear Normal at 1% Significance Level Lilliefors Test Statistic 0.232 Lilliefors GOF Test
1% Lilliefors Critical Value 0.35 Detected Data appear Normal at 1% Significance Level Detected Data appear Normal at 1% Significance Level
Note GOF tests may be unreliable for small sample sizes Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.0466 KM Standard Error of Mean 0.00752
90KM SD 0.026 95% KM (BCA) UCL 0.0585
95% KM (t) UCL 0.06 95% KM (Percentile Bootstrap) UCL 0.0579 95% KM (z) UCL 0.059 95% KM Bootstrap t UCL 0.0606
90% KM Chebyshev UCL 0.0692 95% KM Chebyshev UCL 0.0794

97.5% KM Chebyshev UCL 0.0936 99% KM Chebyshev UCL 0.121 Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 0.543 Anderson-Darling GOF Test
5% A-D Critical Value 0.709 Detected data appear Gamma Distributed at 5% Significance Level K-S Test Statistic 0.258 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.312 Detected data appear Gamma Distributed at 5% Significance Level Detected data appear Gamma Distributed at 5% Significance Level Note GOF tests may be unreliable for small sample sizes Gamma Statistics on Detected Data Only
k hat (MLE) 9.027 k star (bias corrected MLE) 5.253
Theta hat (MLE) 0.00745 Theta star (bias corrected MLE) 0.0128 nu hat (MLE) 126.4 nu star (bias corrected) 73.55
Mean (detects) 0.0673
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.01 Mean 0.0406
Maximum 0.1 Median 0.0332
SD 0.0325 CV 0.801
k hat (MLE) 1.603 k star (bias corrected MLE) 1.307
Theta hat (MLE) 0.0253 Theta star (bias corrected MLE) 0.031 nu hat (MLE) 44.88 nu star (bias corrected) 36.59
Adjusted Level of Significance (β) 0.0312
Approximate Chi Square Value (36.59, α) 23.75 Adjusted Chi Square Value (36.59, β) 22.38 95% Gamma Approximate UCL 0.0625 95% Gamma Adjusted UCL 0.0663 Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.0466 SD (KM) 0.026
Variance (KM) 6.78E-04 SE of Mean (KM) 0.00752
k hat (KM) 3.208 k star (KM) 2.568
nu hat (KM) 89.83 nu star (KM) 71.92
theta hat (KM) 0.0145 theta star (KM) 0.0182
80% gamma percentile (KM) 0.0678 90% gamma percentile (KM) 0.0856 95% gamma percentile (KM) 0.102 99% gamma percentile (KM) 0.139 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (71.92, α) 53.39 Adjusted Chi Square Value (71.92, β) 51.28 95% KM Approximate Gamma UCL 0.0628 95% KM Adjusted Gamma UCL 0.0654 Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.869 Shapiro Wilk GOF Test 10% Shapiro Wilk Critical Value 0.838 Detected Data appear Lognormal at 10% Significance Level Lilliefors Test Statistic 0.243 Lilliefors GOF Test
10% Lilliefors Critical Value 0.28 Detected Data appear Lognormal at 10% Significance Level Detected Data appear Lognormal at 10% Significance Level Note GOF tests may be unreliable for small sample sizes Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.0452 Mean in Log Scale -3.275
SD in Original Scale 0.0285 SD in Log Scale 0.617
95% t UCL (assumes normality of ROS data) 0.0587 95% Percentile Bootstrap UCL 0.0573 95% BCA Bootstrap UCL 0.0583 95% Bootstrap t UCL 0.0631 95% H-UCL (Log ROS) 0.067
Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -3.202 KM Geo Mean 0.0407
KM SD (logged) 0.507 95% Critical H Value (KM-Log) 2.016 KM Standard Error of Mean (logged) 0.146 95% H-UCL (KM -Log) 0.0614 KM SD (logged) 0.507 95% Critical H Value (KM-Log) 2.016 KM Standard Error of Mean (logged) 0.146
DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.0406 Mean in Log Scale -3.519
SD in Original Scale 0.0323 SD in Log Scale 0.832
95% t UCL (Assumes normality) 0.0558 95% H-Stat UCL 0.075 DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Normal Distributed at 1% Significance Level Suggested UCL to Use
95% KM (t) UCL 0.06
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Chloroform
General Statistics
Total Number of Observations 14 Number of Distinct Observations 6 Number of Missing Observations 0
Minimum 0.13 Mean 0.152
Maximum 0.18 Median 0.15
SD 0.0148 Std. Error of Mean 0.00395
Coefficient of Variation 0.0971 Skewness 0.408
Normal GOF Test
Shapiro Wilk Test Statistic 0.922 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data appear Normal at 1% Significance Level Lilliefors Test Statistic 0.223 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data appear Normal at 1% Significance Level Data appear Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.159 95% Adjusted-CLT UCL (Chen-1995) 0.159 95% Modified-t UCL (Johnson-1978) 0.159
Gamma GOF Test
A-D Test Statistic 0.58 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Detected data appear Gamma Distributed at 5% Significance Level K-S Test Statistic 0.232 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Data Not Gamma Distributed at 5% Significance Level Detected data follow Appr. Gamma Distribution at 5% Significance Level Gamma Statistics
k hat (MLE) 116.1 k star (bias corrected MLE) 91.26
Theta hat (MLE) 0.00131 Theta star (bias corrected MLE) 0.00167 nu hat (MLE) 3250 nu star (bias corrected) 2555
MLE Mean (bias corrected) 0.152 MLE Sd (bias corrected) 0.0159 Approximate Chi Square Value (0.05) 2439
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 2424 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.159 95% Adjusted Gamma UCL 0.16 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.926 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data appear Lognormal at 10% Significance Level Lilliefors Test Statistic 0.223 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data appear Approximate Lognormal at 10% Significance Level Lognormal Statistics
Minimum of Logged Data -2.04 Mean of logged Data -1.887 Maximum of Logged Data -1.715 SD of logged Data 0.0961
Assuming Lognormal Distribution
95% H-UCL N/A 90% Chebyshev (MVUE) UCL 0.164
95% Chebyshev (MVUE) UCL 0.169 97.5% Chebyshev (MVUE) UCL 0.177 99% Chebyshev (MVUE) UCL 0.191
Nonparametric Distribution Free UCL Statistics
Data appear to follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.159 95% BCA Bootstrap UCL 0.158
95% Standard Bootstrap UCL 0.158 95% Bootstrap-t UCL 0.159 95% Hall's Bootstrap UCL 0.159 95% Percentile Bootstrap UCL 0.159 90% Chebyshev(Mean, Sd) UCL 0.164 95% Chebyshev(Mean, Sd) UCL 0.169

97.5% Chebyshev(Mean, Sd) UCL 0.177 99% Chebyshev(Mean, Sd) UCL 0.191 Suggested UCL to Use
95% Student's-t UCL 0.159
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Chloromethane
General Statistics
Total Number of Observations 14 Number of Distinct Observations 3 Number of Missing Observations 0
Minimum 0.98 Mean 0.996
Maximum 1 Median 1
SD 0.00633 Std. Error of Mean 0.00169
Coefficient of Variation 0.00636 Skewness -1.687
Normal GOF Test
Shapiro Wilk Test Statistic 0.627 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.428 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.999 95% Adjusted-CLT UCL (Chen-1995) 0.998 95% Modified-t UCL (Johnson-1978) 0.999
Gamma GOF Test
A-D Test Statistic 2.73 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.435 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 26494 k star (bias corrected MLE) 20816
Theta hat (MLE) 3.76E-05 Theta star (bias corrected MLE) 4.79E-05 nu hat (MLE) 741822 nu star (bias corrected) 582861
MLE Mean (bias corrected) 0.996 MLE Sd (bias corrected) 0.00691 Approximate Chi Square Value (0.05) 581087
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 580851 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.999 95% Adjusted Gamma UCL 1 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.627 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.428 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -0.0202 Mean of logged Data -0.0036 Maximum of Logged Data 0 SD of logged Data 0.00639
Assuming Lognormal Distribution
95% H-UCL N/A 90% Chebyshev (MVUE) UCL 1.002
95% Chebyshev (MVUE) UCL 1.004 97.5% Chebyshev (MVUE) UCL 1.007 99% Chebyshev (MVUE) UCL 1.013
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.999 95% BCA Bootstrap UCL N/A
95% Standard Bootstrap UCL N/A 95% Bootstrap-t UCL N/A
95% Hall's Bootstrap UCL N/A 95% Percentile Bootstrap UCL N/A 90% Chebyshev(Mean, Sd) UCL 1.002 95% Chebyshev(Mean, Sd) UCL 1.004

97.5% Chebyshev(Mean, Sd) UCL 1.007 99% Chebyshev(Mean, Sd) UCL 1.013 Suggested UCL to Use
95% Student's-t UCL 0.999
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Note: For highly negatively-skewed data, confidence limits (e.g., Chen, Johnson, Lognormal, and Gamma) may not be reliable. Chen's and Johnson's methods provide adjustments for positvely skewed data sets.

Ethylbenzene
General Statistics
Total Number of Observations 14 Number of Distinct Observations 8 Number of Missing Observations 0
Minimum 0.25 Mean 0.287
Maximum 0.45 Median 0.27
SD 0.0518 Std. Error of Mean 0.0138
Coefficient of Variation 0.18 Skewness 2.739
Normal GOF Test
Shapiro Wilk Test Statistic 0.638 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.273 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.312 95% Adjusted-CLT UCL (Chen-1995) 0.321 95% Modified-t UCL (Johnson-1978) 0.313
Gamma GOF Test
A-D Test Statistic 1.694 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.276 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 41.34 k star (bias corrected MLE) 32.53
Theta hat (MLE) 0.00695 Theta star (bias corrected MLE) 0.00883 nu hat (MLE) 1158 nu star (bias corrected) 910.9
MLE Mean (bias corrected) 0.287 MLE Sd (bias corrected) 0.0503 Approximate Chi Square Value (0.05) 841.8
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 833 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.311 95% Adjusted Gamma UCL 0.314 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.7 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.269 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -1.386 Mean of logged Data -1.26 Maximum of Logged Data -0.799 SD of logged Data 0.153
Assuming Lognormal Distribution
95% H-UCL 0.31 90% Chebyshev (MVUE) UCL 0.322
95% Chebyshev (MVUE) UCL 0.338 97.5% Chebyshev (MVUE) UCL 0.36 99% Chebyshev (MVUE) UCL 0.404
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.31 95% BCA Bootstrap UCL 0.321
95% Standard Bootstrap UCL 0.309 95% Bootstrap-t UCL 0.35 95% Hall's Bootstrap UCL 0.396 95% Percentile Bootstrap UCL 0.311 90% Chebyshev(Mean, Sd) UCL 0.329 95% Chebyshev(Mean, Sd) UCL 0.347

97.5% Chebyshev(Mean, Sd) UCL 0.374 99% Chebyshev(Mean, Sd) UCL 0.425 Suggested UCL to Use
95% Student's-t UCL 0.312
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Freon 113
General Statistics
Total Number of Observations 14 Number of Distinct Observations 3 Number of Missing Observations 0
Minimum 0.44 Mean 0.462
Maximum 0.47 Median 0.46
SD 0.00802 Std. Error of Mean 0.00214
Coefficient of Variation 0.0173 Skewness -1.482
Normal GOF Test
Shapiro Wilk Test Statistic 0.723 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.323 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.466 95% Adjusted-CLT UCL (Chen-1995) 0.465 95% Modified-t UCL (Johnson-1978) 0.466
Gamma GOF Test
A-D Test Statistic 1.592 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.297 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 3524 k star (bias corrected MLE) 2769
Theta hat (MLE) 1.31E-04 Theta star (bias corrected MLE) 1.67E-04 nu hat (MLE) 98661 nu star (bias corrected) 77521
MLE Mean (bias corrected) 0.462 MLE Sd (bias corrected) 0.00878 Approximate Chi Square Value (0.05) 76874
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 76789 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.466 95% Adjusted Gamma UCL 0.467 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.718 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.327 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -0.821 Mean of logged Data -0.772 Maximum of Logged Data -0.755 SD of logged Data 0.0176
Assuming Lognormal Distribution
95% H-UCL N/A 90% Chebyshev (MVUE) UCL 0.469
95% Chebyshev (MVUE) UCL 0.472 97.5% Chebyshev (MVUE) UCL 0.476 99% Chebyshev (MVUE) UCL 0.484
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.466 95% BCA Bootstrap UCL N/A
95% Standard Bootstrap UCL N/A 95% Bootstrap-t UCL N/A
95% Hall's Bootstrap UCL N/A 95% Percentile Bootstrap UCL N/A 90% Chebyshev(Mean, Sd) UCL 0.469 95% Chebyshev(Mean, Sd) UCL 0.471

97.5% Chebyshev(Mean, Sd) UCL 0.476 99% Chebyshev(Mean, Sd) UCL 0.483 Suggested UCL to Use
95% Student's-t UCL 0.466
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Note: For highly negatively-skewed data, confidence limits (e.g., Chen, Johnson, Lognormal, and Gamma) may not be reliable. Chen's and Johnson's methods provide adjustments for positvely skewed data sets.

Freon 114
General Statistics
Total Number of Observations 14 Number of Distinct Observations 2 Number of Missing Observations 0
Minimum 0.11 Mean 0.117
Maximum 0.12 Median 0.12
SD 0.00469 Std. Error of Mean 0.00125
Coefficient of Variation 0.04 Skewness -1.067
Normal GOF Test
Shapiro Wilk Test Statistic 0.576 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.443 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.119 95% Adjusted-CLT UCL (Chen-1995) 0.119 95% Modified-t UCL (Johnson-1978) 0.119
Gamma GOF Test
A-D Test Statistic 3.136 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.451 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 655.6 k star (bias corrected MLE) 515.2
Theta hat (MLE) 1.79E-04 Theta star (bias corrected MLE) 2.27E-04 nu hat (MLE) 18357 nu star (bias corrected) 14425
MLE Mean (bias corrected) 0.117 MLE Sd (bias corrected) 0.00516 Approximate Chi Square Value (0.05) 14147
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 14110 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.119 95% Adjusted Gamma UCL 0.12 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.576 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.443 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -2.207 Mean of logged Data -2.145 Maximum of Logged Data -2.12 SD of logged Data 0.0408
Assuming Lognormal Distribution
95% H-UCL N/A 90% Chebyshev (MVUE) UCL 0.121
95% Chebyshev (MVUE) UCL 0.123 97.5% Chebyshev (MVUE) UCL 0.125 99% Chebyshev (MVUE) UCL 0.13
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.119 95% BCA Bootstrap UCL N/A
95% Standard Bootstrap UCL N/A 95% Bootstrap-t UCL N/A
95% Hall's Bootstrap UCL N/A 95% Percentile Bootstrap UCL N/A 90% Chebyshev(Mean, Sd) UCL 0.121 95% Chebyshev(Mean, Sd) UCL 0.123

97.5% Chebyshev(Mean, Sd) UCL 0.125 99% Chebyshev(Mean, Sd) UCL 0.13 Suggested UCL to Use
95% Student's-t UCL 0.119
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Note: For highly negatively-skewed data, confidence limits (e.g., Chen, Johnson, Lognormal, and Gamma) may not be reliable. Chen's and Johnson's methods provide adjustments for positvely skewed data sets.

Freon 12
General Statistics
Total Number of Observations 14 Number of Distinct Observations 1 Number of Missing Observations 0
Minimum 2.3 Mean 2.3
Maximum 2.3 Median 2.3
Warning: There is only one distinct observation value in this data set - resulting in '0' variance! ProUCL (or any other software) should not be used on such a data set! The data set for variable Freon 12 was not processed!
If possible, compute and collect Data Quality Objectives (DQOs) based sample size and analytical results.

The Project Team may decide to use alternative site specific values to estimate environmental parameters (e.g., EPC, BTV). m,p-Xylenes
General Statistics
Total Number of Observations 14 Number of Distinct Observations 12 Number of Missing Observations 0
Minimum 0.7 Mean 0.809
Maximum 1.2 Median 0.77
SD 0.133 Std. Error of Mean 0.0354
Coefficient of Variation 0.164 Skewness 2.237
Normal GOF Test
Shapiro Wilk Test Statistic 0.747 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.272 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.872 95% Adjusted-CLT UCL (Chen-1995) 0.89 95% Modified-t UCL (Johnson-1978) 0.876
Gamma GOF Test
A-D Test Statistic 1.041 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.261 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 47.37 k star (bias corrected MLE) 37.27
Theta hat (MLE) 0.0171 Theta star (bias corrected MLE) 0.0217 nu hat (MLE) 1326 nu star (bias corrected) 1043
MLE Mean (bias corrected) 0.809 MLE Sd (bias corrected) 0.133 Approximate Chi Square Value (0.05) 969.5
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 960 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.871 95% Adjusted Gamma UCL 0.88 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.806 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.251 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -0.357 Mean of logged Data -0.222 Maximum of Logged Data 0.182 SD of logged Data 0.145
Assuming Lognormal Distribution
95% H-UCL 0.869 90% Chebyshev (MVUE) UCL 0.903
95% Chebyshev (MVUE) UCL 0.946 97.5% Chebyshev (MVUE) UCL 1.005 99% Chebyshev (MVUE) UCL 1.122
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.868 95% BCA Bootstrap UCL 0.89
95% Standard Bootstrap UCL 0.866 95% Bootstrap-t UCL 0.926 95% Hall's Bootstrap UCL 1.111 95% Percentile Bootstrap UCL 0.871 90% Chebyshev(Mean, Sd) UCL 0.916 95% Chebyshev(Mean, Sd) UCL 0.964

97.5% Chebyshev(Mean, Sd) UCL 1.031 99% Chebyshev(Mean, Sd) UCL 1.162 Suggested UCL to Use
95% Student's-t UCL 0.872
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Methylene Chloride
General Statistics
Total Number of Observations 14 Number of Distinct Observations 11 Number of Missing Observations 0
Minimum 0.55 Mean 0.836
Maximum 2.8 Median 0.61
SD 0.591 Std. Error of Mean 0.158
Coefficient of Variation 0.706 Skewness 3.26
Normal GOF Test
Shapiro Wilk Test Statistic 0.506 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.348 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 1.116 95% Adjusted-CLT UCL (Chen-1995) 1.243 95% Modified-t UCL (Johnson-1978) 1.139
Gamma GOF Test
A-D Test Statistic 2.169 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.74 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.298 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.23 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 4.27 k star (bias corrected MLE) 3.403
Theta hat (MLE) 0.196 Theta star (bias corrected MLE) 0.246 nu hat (MLE) 119.6 nu star (bias corrected) 95.27
MLE Mean (bias corrected) 0.836 MLE Sd (bias corrected) 0.453 Approximate Chi Square Value (0.05) 73.76
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 71.25 Assuming Gamma Distribution
95% Approximate Gamma UCL 1.08 95% Adjusted Gamma UCL 1.118 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.663 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.262 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -0.598 Mean of logged Data -0.3
Maximum of Logged Data 1.03 SD of logged Data 0.437
Assuming Lognormal Distribution
95% H-UCL 1.038 90% Chebyshev (MVUE) UCL 1.098
95% Chebyshev (MVUE) UCL 1.229 97.5% Chebyshev (MVUE) UCL 1.411 99% Chebyshev (MVUE) UCL 1.769
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 1.096 95% BCA Bootstrap UCL 1.283
95% Standard Bootstrap UCL 1.082 95% Bootstrap-t UCL 2.143 95% Hall's Bootstrap UCL 2.094 95% Percentile Bootstrap UCL 1.116 90% Chebyshev(Mean, Sd) UCL 1.31 95% Chebyshev(Mean, Sd) UCL 1.524

97.5% Chebyshev(Mean, Sd) UCL 1.822 99% Chebyshev(Mean, Sd) UCL 2.407 Suggested UCL to Use
95% Student's-t UCL 1.116
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Naphthalene
General Statistics
Total Number of Observations 14 Number of Distinct Observations 10 Number of Detects 10 Number of Non-Detects 4
Number of Distinct Detects 8 Number of Distinct Non-Detects 2 Minimum Detect 0.057 Minimum Non-Detect 0.052
Maximum Detect 0.14 Maximum Non-Detect 0.058
Variance Detects 7.92E-04 Percent Non-Detects 28.57%
Mean Detects 0.0809 SD Detects 0.0281
Median Detects 0.0755 CV Detects 0.348
Skewness Detects 1.375 Kurtosis Detects 1.072
Mean of Logged Detects -2.561 SD of Logged Detects 0.311 Normal GOF Test on Detects Only
Shapiro Wilk Test Statistic 0.809 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.781 Detected Data appear Normal at 1% Significance Level Lilliefors Test Statistic 0.241 Lilliefors GOF Test
1% Lilliefors Critical Value 0.304 Detected Data appear Normal at 1% Significance Level Detected Data appear Normal at 1% Significance Level
Kaplan-Meier (KM) Statistics using Normal Critical Values and other Nonparametric UCLs KM Mean 0.0727 KM Standard Error of Mean 0.00733
90KM SD 0.026 95% KM (BCA) UCL 0.0863
95% KM (t) UCL 0.0857 95% KM (Percentile Bootstrap) UCL 0.0849 95% KM (z) UCL 0.0848 95% KM Bootstrap t UCL 0.0965
90% KM Chebyshev UCL 0.0947 95% KM Chebyshev UCL 0.105

97.5% KM Chebyshev UCL 0.119 99% KM Chebyshev UCL 0.146 Gamma GOF Tests on Detected Observations Only
A-D Test Statistic 0.693 Anderson-Darling GOF Test
5% A-D Critical Value 0.725 Detected data appear Gamma Distributed at 5% Significance Level K-S Test Statistic 0.211 Kolmogorov-Smirnov GOF
5% K-S Critical Value 0.267 Detected data appear Gamma Distributed at 5% Significance Level Detected data appear Gamma Distributed at 5% Significance Level Gamma Statistics on Detected Data Only
k hat (MLE) 10.84 k star (bias corrected MLE) 7.653
Theta hat (MLE) 0.00746 Theta star (bias corrected MLE) 0.0106 nu hat (MLE) 216.8 nu star (bias corrected) 153.1
Mean (detects) 0.0809
Gamma ROS Statistics using Imputed Non-Detects
GROS may not be used when data set has > 50% NDs with many tied observations at multiple DLs GROS may not be used when kstar of detects is small such as <1.0, especially when the sample size is small (e.g., <15-20) For such situations, GROS method may yield incorrect values of UCLs and BTVs This is especially true when the sample size is small.

For gamma distributed detected data, BTVs and UCLs may be computed using gamma distribution on KM estimates Minimum 0.0128 Mean 0.0649
Maximum 0.14 Median 0.059
SD 0.0355 CV 0.547
k hat (MLE) 3.138 k star (bias corrected MLE) 2.513
Theta hat (MLE) 0.0207 Theta star (bias corrected MLE) 0.0258 nu hat (MLE) 87.86 nu star (bias corrected) 70.36
Adjusted Level of Significance (β) 0.0312
Approximate Chi Square Value (70.36, α) 52.05 Adjusted Chi Square Value (70.36, β) 49.97 95% Gamma Approximate UCL 0.0877 95% Gamma Adjusted UCL 0.0913 Estimates of Gamma Parameters using KM Estimates
Mean (KM) 0.0727 SD (KM) 0.026
Variance (KM) 6.76E-04 SE of Mean (KM) 0.00733
k hat (KM) 7.821 k star (KM) 6.192
nu hat (KM) 219 nu star (KM) 173.4
theta hat (KM) 0.0093 theta star (KM) 0.0117
80% gamma percentile (KM) 0.0955 90% gamma percentile (KM) 0.112 95% gamma percentile (KM) 0.127 99% gamma percentile (KM) 0.157 Gamma Kaplan-Meier (KM) Statistics
Approximate Chi Square Value (173.39, α) 143.9 Adjusted Chi Square Value (173.39, β) 140.4 95% KM Approximate Gamma UCL 0.0876 95% KM Adjusted Gamma UCL 0.0898 Lognormal GOF Test on Detected Observations Only
Shapiro Wilk Test Statistic 0.86 Shapiro Wilk GOF Test
10% Shapiro Wilk Critical Value 0.869 Detected Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.206 Lilliefors GOF Test
10% Lilliefors Critical Value 0.241 Detected Data appear Lognormal at 10% Significance Level Detected Data appear Approximate Lognormal at 10% Significance Level Lognormal ROS Statistics Using Imputed Non-Detects
Mean in Original Scale 0.0685 Mean in Log Scale -2.77
SD in Original Scale 0.0311 SD in Log Scale 0.434
95% t UCL (assumes normality of ROS data) 0.0832 95% Percentile Bootstrap UCL 0.0823 95% BCA Bootstrap UCL 0.0836 95% Bootstrap t UCL 0.0899 95% H-UCL (Log ROS) 0.0876
Statistics using KM estimates on Logged Data and Assuming Lognormal Distribution KM Mean (logged) -2.673 KM Geo Mean 0.0691
KM SD (logged) 0.305 95% Critical H Value (KM-Log) 1.899 KM Standard Error of Mean (logged) 0.0861 95% H-UCL (KM -Log) 0.085 KM SD (logged) 0.305 95% Critical H Value (KM-Log) 1.899 KM Standard Error of Mean (logged) 0.0861
DL/2 Statistics
DL/2 Normal DL/2 Log-Transformed
Mean in Original Scale 0.0654 Mean in Log Scale -2.865
SD in Original Scale 0.0345 SD in Log Scale 0.561
95% t UCL (Assumes normality) 0.0818 95% H-Stat UCL 0.0927 DL/2 is not a recommended method, provided for comparisons and historical reasons Nonparametric Distribution Free UCL Statistics
Detected Data appear Normal Distributed at 1% Significance Level Suggested UCL to Use
95% KM (t) UCL 0.0857
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician. o-Xylene
General Statistics
Total Number of Observations 14 Number of Distinct Observations 8 Number of Missing Observations 0
Minimum 0.28 Mean 0.313
Maximum 0.37 Median 0.305
SD 0.0315 Std. Error of Mean 0.00841
Coefficient of Variation 0.101 Skewness 0.849
Normal GOF Test
Shapiro Wilk Test Statistic 0.876 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data appear Normal at 1% Significance Level Lilliefors Test Statistic 0.179 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data appear Normal at 1% Significance Level Data appear Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.328 95% Adjusted-CLT UCL (Chen-1995) 0.329 95% Modified-t UCL (Johnson-1978) 0.328
Gamma GOF Test
A-D Test Statistic 0.588 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Detected data appear Gamma Distributed at 5% Significance Level K-S Test Statistic 0.169 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Detected data appear Gamma Distributed at 5% Significance Level Detected data appear Gamma Distributed at 5% Significance Level Gamma Statistics
k hat (MLE) 110.8 k star (bias corrected MLE) 87.12
Theta hat (MLE) 0.00282 Theta star (bias corrected MLE) 0.00359 nu hat (MLE) 3103 nu star (bias corrected) 2439
MLE Mean (bias corrected) 0.313 MLE Sd (bias corrected) 0.0335 Approximate Chi Square Value (0.05) 2326
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 2311 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.328 95% Adjusted Gamma UCL 0.33 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.89 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.162 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data appear Lognormal at 10% Significance Level Data appear Approximate Lognormal at 10% Significance Level Lognormal Statistics
Minimum of Logged Data -1.273 Mean of logged Data -1.167 Maximum of Logged Data -0.994 SD of logged Data 0.0977
Assuming Lognormal Distribution
95% H-UCL N/A 90% Chebyshev (MVUE) UCL 0.337
95% Chebyshev (MVUE) UCL 0.348 97.5% Chebyshev (MVUE) UCL 0.364 99% Chebyshev (MVUE) UCL 0.394
Nonparametric Distribution Free UCL Statistics
Data appear to follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.327 95% BCA Bootstrap UCL 0.328
95% Standard Bootstrap UCL 0.326 95% Bootstrap-t UCL 0.331 95% Hall's Bootstrap UCL 0.328 95% Percentile Bootstrap UCL 0.326 90% Chebyshev(Mean, Sd) UCL 0.338 95% Chebyshev(Mean, Sd) UCL 0.35

97.5% Chebyshev(Mean, Sd) UCL 0.365 99% Chebyshev(Mean, Sd) UCL 0.397 Suggested UCL to Use
95% Student's-t UCL 0.328
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Styrene
General Statistics
Total Number of Observations 14 Number of Distinct Observations 9 Number of Missing Observations 0
Minimum 0.076 Mean 0.128
Maximum 0.32 Median 0.12
SD 0.0581 Std. Error of Mean 0.0155
Coefficient of Variation 0.455 Skewness 3.111
Normal GOF Test
Shapiro Wilk Test Statistic 0.599 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.346 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 0.155 95% Adjusted-CLT UCL (Chen-1995) 0.167 95% Modified-t UCL (Johnson-1978) 0.158
Gamma GOF Test
A-D Test Statistic 1.356 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.736 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.293 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.229 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 8.31 k star (bias corrected MLE) 6.577
Theta hat (MLE) 0.0154 Theta star (bias corrected MLE) 0.0195 nu hat (MLE) 232.7 nu star (bias corrected) 184.2
MLE Mean (bias corrected) 0.128 MLE Sd (bias corrected) 0.0499 Approximate Chi Square Value (0.05) 153.8
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 150.1 Assuming Gamma Distribution
95% Approximate Gamma UCL 0.153 95% Adjusted Gamma UCL 0.157 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.794 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.264 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data -2.577 Mean of logged Data -2.118 Maximum of Logged Data -1.139 SD of logged Data 0.329
Assuming Lognormal Distribution
95% H-UCL 0.151 90% Chebyshev (MVUE) UCL 0.16
95% Chebyshev (MVUE) UCL 0.176 97.5% Chebyshev (MVUE) UCL 0.197 99% Chebyshev (MVUE) UCL 0.239
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 0.153 95% BCA Bootstrap UCL 0.168
95% Standard Bootstrap UCL 0.153 95% Bootstrap-t UCL 0.192 95% Hall's Bootstrap UCL 0.264 95% Percentile Bootstrap UCL 0.157 90% Chebyshev(Mean, Sd) UCL 0.175 95% Chebyshev(Mean, Sd) UCL 0.196

97.5% Chebyshev(Mean, Sd) UCL 0.225 99% Chebyshev(Mean, Sd) UCL 0.283 Suggested UCL to Use
95% Student's-t UCL 0.155
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Tetrachloroethene
General Statistics
Total Number of Observations 14 Number of Distinct Observations 4 Number of Detects 1 Number of Non-Detects 13
Number of Distinct Detects 1 Number of Distinct Non-Detects 3 Warning: Only one distinct data value was detected! ProUCL (or any other software) should not be used on such a data set! It is suggested to use alternative site specific values determined by the Project Team to estimate environmental parameters (e.g., EPC, BTV).

The data set for variable Tetrachloroethene was not processed! Toluene
General Statistics
Total Number of Observations 13 Number of Distinct Observations 7 Number of Missing Observations 0
Minimum 1.2 Mean 1.523
Maximum 2 Median 1.5
SD 0.228 Std. Error of Mean 0.0632
Coefficient of Variation 0.15 Skewness 0.863
Normal GOF Test
Shapiro Wilk Test Statistic 0.919 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.814 Data appear Normal at 1% Significance Level Lilliefors Test Statistic 0.214 Lilliefors GOF Test
1% Lilliefors Critical Value 0.271 Data appear Normal at 1% Significance Level Data appear Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 1.636 95% Adjusted-CLT UCL (Chen-1995) 1.643 95% Modified-t UCL (Johnson-1978) 1.638
Gamma GOF Test
A-D Test Statistic 0.397 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Detected data appear Gamma Distributed at 5% Significance Level K-S Test Statistic 0.19 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.236 Detected data appear Gamma Distributed at 5% Significance Level Detected data appear Gamma Distributed at 5% Significance Level Gamma Statistics
k hat (MLE) 50.9 k star (bias corrected MLE) 39.2
Theta hat (MLE) 0.0299 Theta star (bias corrected MLE) 0.0388 nu hat (MLE) 1323 nu star (bias corrected) 1019
MLE Mean (bias corrected) 1.523 MLE Sd (bias corrected) 0.243 Approximate Chi Square Value (0.05) 946.2
Adjusted Level of Significance 0.0301 Adjusted Chi Square Value 936.2 Assuming Gamma Distribution
95% Approximate Gamma UCL 1.641 95% Adjusted Gamma UCL 1.658 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.947 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.889 Data appear Lognormal at 10% Significance Level Lilliefors Test Statistic 0.187 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.215 Data appear Lognormal at 10% Significance Level Data appear Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data 0.182 Mean of logged Data 0.411
Maximum of Logged Data 0.693 SD of logged Data 0.145
Assuming Lognormal Distribution
95% H-UCL 1.642 90% Chebyshev (MVUE) UCL 1.706
95% Chebyshev (MVUE) UCL 1.79 97.5% Chebyshev (MVUE) UCL 1.905 99% Chebyshev (MVUE) UCL 2.132
Nonparametric Distribution Free UCL Statistics
Data appear to follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 1.627 95% BCA Bootstrap UCL 1.631
95% Standard Bootstrap UCL 1.625 95% Bootstrap-t UCL 1.669 95% Hall's Bootstrap UCL 1.723 95% Percentile Bootstrap UCL 1.631 90% Chebyshev(Mean, Sd) UCL 1.713 95% Chebyshev(Mean, Sd) UCL 1.799

97.5% Chebyshev(Mean, Sd) UCL 1.918 99% Chebyshev(Mean, Sd) UCL 2.152 Suggested UCL to Use
95% Student's-t UCL 1.636
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Trichlorofluoromethane
General Statistics
Total Number of Observations 14 Number of Distinct Observations 2 Number of Missing Observations 0
Minimum 1 Mean 1.093
Maximum 1.1 Median 1.1
SD 0.0267 Std. Error of Mean 0.00714
Coefficient of Variation 0.0245 Skewness -3.742
Normal GOF Test
Shapiro Wilk Test Statistic 0.297 Shapiro Wilk GOF Test 1% Shapiro Wilk Critical Value 0.825 Data Not Normal at 1% Significance Level Lilliefors Test Statistic 0.534 Lilliefors GOF Test
1% Lilliefors Critical Value 0.263 Data Not Normal at 1% Significance Level Data Not Normal at 1% Significance Level
Assuming Normal Distribution
95% Normal UCL 95% UCLs (Adjusted for Skewness)
95% Student's-t UCL 1.106 95% Adjusted-CLT UCL (Chen-1995) 1.097 95% Modified-t UCL (Johnson-1978) 1.104
Gamma GOF Test
A-D Test Statistic 4.872 Anderson-Darling Gamma GOF Test 5% A-D Critical Value 0.733 Data Not Gamma Distributed at 5% Significance Level K-S Test Statistic 0.538 Kolmogorov-Smirnov Gamma GOF Test 5% K-S Critical Value 0.228 Data Not Gamma Distributed at 5% Significance Level Data Not Gamma Distributed at 5% Significance Level
Gamma Statistics
k hat (MLE) 1706 k star (bias corrected MLE) 1340
Theta hat (MLE) 6.41E-04 Theta star (bias corrected MLE) 8.15E-04 nu hat (MLE) 47755 nu star (bias corrected) 37523
MLE Mean (bias corrected) 1.093 MLE Sd (bias corrected) 0.0299 Approximate Chi Square Value (0.05) 37074
Adjusted Level of Significance 0.0312 Adjusted Chi Square Value 37015 Assuming Gamma Distribution
95% Approximate Gamma UCL 1.106 95% Adjusted Gamma UCL 1.108 Lognormal GOF Test
Shapiro Wilk Test Statistic 0.297 Shapiro Wilk Lognormal GOF Test 10% Shapiro Wilk Critical Value 0.895 Data Not Lognormal at 10% Significance Level Lilliefors Test Statistic 0.534 Lilliefors Lognormal GOF Test 10% Lilliefors Critical Value 0.208 Data Not Lognormal at 10% Significance Level Data Not Lognormal at 10% Significance Level
Lognormal Statistics
Minimum of Logged Data 0 Mean of logged Data 0.0885
Maximum of Logged Data 0.0953 SD of logged Data 0.0255
Assuming Lognormal Distribution
95% H-UCL N/A 90% Chebyshev (MVUE) UCL 1.115
95% Chebyshev (MVUE) UCL 1.125 97.5% Chebyshev (MVUE) UCL 1.139 99% Chebyshev (MVUE) UCL 1.167
Nonparametric Distribution Free UCL Statistics
Data do not follow a Discernible Distribution
Nonparametric Distribution Free UCLs
95% CLT UCL 1.105 95% BCA Bootstrap UCL N/A
95% Standard Bootstrap UCL N/A 95% Bootstrap-t UCL N/A
95% Hall's Bootstrap UCL N/A 95% Percentile Bootstrap UCL N/A 90% Chebyshev(Mean, Sd) UCL 1.114 95% Chebyshev(Mean, Sd) UCL 1.124

97.5% Chebyshev(Mean, Sd) UCL 1.137 99% Chebyshev(Mean, Sd) UCL 1.164 Suggested UCL to Use
95% Student's-t UCL 1.106
Recommended UCL exceeds the maximum observation
Note: Suggestions regarding the selection of a 95% UCL are provided to help the user to select the most appropriate 95% UCL.

Recommendations are based upon data size, data distribution, and skewness using results from simulation studies.

However, simulations results will not cover all Real World data sets; for additional insight the user may want to consult a statistician.

Note: For highly negatively-skewed data, confidence limits (e.g., Chen, Johnson, Lognormal, and Gamma) may not be reliable. Chen's and Johnson's methods provide adjustments for positvely skewed data sets.

Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
February 2025
Appendix E
Laboratory Analytical Reports – 14-day Samples
Enthalpy Analytical
931 West Barkley Ave
Orange, CA 92868
(714) 771-6900
enthalpy.com
Lab Job Number : 518235
Report Level : II
Report Date : 10/22/2024
Analytical Report prepared for:

Yola Bayram
Catalyst Environmental Solutions
315 Montana Avenue
Suite 311
Santa Monica, CA 90403
Location: Walnut Bluff Workplan
Miguel Gamboa, Project Manager
[email protected]
This data package has been reviewed for technical correctness and completeness. Release of this data has been authorized by the Laboratory Manager or the Manager's designee, as verified by the above signature which applies to this PDF file as well as any associated electronic data deliverable files. The results contained in this report meet all requirements of NELAP and pertain only to those samples which were submitted for analysis. This report may be reproduced only in its entirety.

CA ELAP# 1338, NELAP# 4038, SCAQMD LAP# 18LA0518, LACSD ID# 10105 Authorized for release by:
1 of 63
Sample Summary
Yola Bayram
Catalyst Environmental
Solutions
315 Montana Avenue
Suite 311
Santa Monica, CA 90403
Lab Job #: 518235
Location: Walnut Bluff Workplan
Date Received: 10/15/24
Sample ID Lab ID Collected Matrix
WB01-14D 518235-001 10/15/24 11:37 Air
WB02-14D 518235-002 10/15/24 11:34 Air
WB03-14D 518235-003 10/15/24 11:46 Air
WB04-14D 518235-004 10/15/24 11:50 Air
WB05-14D 518235-005 10/15/24 12:01 Air
WB06-14D 518235-006 10/15/24 11:56 Air
WB07-14D 518235-007 10/15/24 12:06 Air
WB08-14D 518235-008 10/15/24 12:11 Air
WB09-14D 518235-009 10/15/24 11:05 Air
WB10-14D 518235-010 10/15/24 11:12 Air
WB11-14D 518235-011 10/15/24 11:16 Air
WB12-14D 518235-012 10/15/24 11:20 Air
WB13-14D 518235-013 10/15/24 11:24 Air
WB14-14D 518235-014 10/15/24 11:28 Air
WB17-14D 518235-015 10/15/24 09:40 Air
WB18-14D 518235-016 10/15/24 10:28 Air
WB19-14D 518235-017 10/15/24 14:44 Air
2 of 63
Case Narrative
Catalyst Environmental Solutions
315 Montana Avenue
Suite 311
Santa Monica, CA 90403
Yola Bayram
Lab Job Number: 518235
Location: Walnut Bluff Workplan
Date Received: 10/15/24
This data package contains sample and QC results for seventeen air samples, requested for the above referenced project on 10/15/24. The samples were received intact.

Volatile Organics in Air by MS (EPA TO-15 SIM):

No analytical problems were encountered.
1 of 1
3 of 63
Yola Bayram
Catalyst Environmental Solutions
315 Montana Avenue
Suite 311
Santa Monica, CA 90403
Lab Job #: 518235
Location: Walnut Bluff Workplan
Date Received: 10/15/24
Sample ID: WB01-14D Lab ID: 518235-001 Collected: 10/15/24 11:37 Matrix: Air
518235-001 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 460 pptv 11
Freon 12 2.3 ug/m3 0.054
Chloromethane 480 pptv 110
Chloromethane 0.99 ug/m3 0.23
Freon 114 16 pptv 11
Freon 114 0.11 ug/m3 0.077
Bromomethane 21 pptv 11
Bromomethane 0.080 ug/m3 0.043
Trichlorofluoromethane 190 pptv 11
Trichlorofluoromethane 1.1 ug/m3 0.062
Methylene Chloride 160 pptv 22
Methylene Chloride 0.55 ug/m3 0.076
Freon 113 60 pptv 11
Freon 113 0.46 ug/m3 0.084
Chloroform 28 pptv 11
Chloroform 0.14 ug/m3 0.054
1,2-Dichloroethane 16 pptv 11
1,2-Dichloroethane 0.063 ug/m3 0.045
Benzene 250 pptv 11
Benzene 0.80 ug/m3 0.035
Carbon Tetrachloride 73 pptv 11
Carbon Tetrachloride 0.46 ug/m3 0.069
Toluene 360 pptv 11
Toluene 1.4 ug/m3 0.041
Ethylbenzene 63 pptv 11
Ethylbenzene 0.27 ug/m3 0.048
m,p-Xylenes 180 pptv 11
m,p-Xylenes 0.79 ug/m3 0.048
Styrene 24 pptv 11
Styrene 0.10 ug/m3 0.047
o-Xylene 73 pptv 11
o-Xylene 0.32 ug/m3 0.048
1,3,5-Trimethylbenzene 15 pptv 11
1,3,5-Trimethylbenzene 0.074 ug/m3 0.054
1,2,4-Trimethylbenzene 61 pptv 11
1,2,4-Trimethylbenzene 0.30 ug/m3 0.054
Naphthalene 11 pptv 11
Naphthalene 0.059 ug/m3 0.058
Xylene (total) 250 pptv 11
Xylene (total) 1.1 ug/m3 0.048
1 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 4 of 63 2 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 5 of 63 Sample ID: WB02-14D Lab ID: 518235-002 Collected: 10/15/24 11:34 Matrix: Air
518235-002 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 470 pptv 10
Freon 12 2.3 ug/m3 0.049
Chloromethane 480 pptv 100
Chloromethane 0.99 ug/m3 0.21
Freon 114 16 pptv 10
Freon 114 0.12 ug/m3 0.070
Bromomethane 22 pptv 10
Bromomethane 0.084 ug/m3 0.039
Chloroethane 19 pptv 10
Chloroethane 0.049 ug/m3 0.026
Trichlorofluoromethane 180 pptv 10
Trichlorofluoromethane 1.0 ug/m3 0.056
Methylene Chloride 170 pptv 20
Methylene Chloride 0.60 ug/m3 0.069
Freon 113 58 pptv 10
Freon 113 0.44 ug/m3 0.077
Chloroform 32 pptv 10
Chloroform 0.16 ug/m3 0.049
1,2-Dichloroethane 16 pptv 10
1,2-Dichloroethane 0.066 ug/m3 0.040
Benzene 260 pptv 10
Benzene 0.83 ug/m3 0.032
Carbon Tetrachloride 71 pptv 10
Carbon Tetrachloride 0.45 ug/m3 0.063
Toluene 410 pptv 10
Toluene 1.5 ug/m3 0.038
Ethylbenzene 75 pptv 10
Ethylbenzene 0.33 ug/m3 0.043
m,p-Xylenes 210 pptv 10
m,p-Xylenes 0.90 ug/m3 0.043
Styrene 28 pptv 10
Styrene 0.12 ug/m3 0.043
o-Xylene 82 pptv 10
o-Xylene 0.35 ug/m3 0.043
1,3,5-Trimethylbenzene 20 pptv 10
1,3,5-Trimethylbenzene 0.10 ug/m3 0.049
1,2,4-Trimethylbenzene 74 pptv 10
1,2,4-Trimethylbenzene 0.37 ug/m3 0.049
Naphthalene 15 pptv 10
Naphthalene 0.077 ug/m3 0.052
Xylene (total) 290 pptv 10
Xylene (total) 1.3 ug/m3 0.043
3 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 6 of 63 Sample ID: WB03-14D Lab ID: 518235-003 Collected: 10/15/24 11:46 Matrix: Air
518235-003 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 470 pptv 10
Freon 12 2.3 ug/m3 0.049
Chloromethane 490 pptv 100
Chloromethane 1.0 ug/m3 0.21
Freon 114 17 pptv 10
Freon 114 0.12 ug/m3 0.070
Bromomethane 21 pptv 10
Bromomethane 0.082 ug/m3 0.039
Trichlorofluoromethane 200 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 170 pptv 20
Methylene Chloride 0.59 ug/m3 0.069
Freon 113 61 pptv 10
Freon 113 0.47 ug/m3 0.077
Chloroform 34 pptv 10
Chloroform 0.17 ug/m3 0.049
1,2-Dichloroethane 15 pptv 10
1,2-Dichloroethane 0.062 ug/m3 0.040
Benzene 230 pptv 10
Benzene 0.72 ug/m3 0.032
Carbon Tetrachloride 75 pptv 10
Carbon Tetrachloride 0.47 ug/m3 0.063
Toluene 330 pptv 10
Toluene 1.2 ug/m3 0.038
Ethylbenzene 57 pptv 10
Ethylbenzene 0.25 ug/m3 0.043
m,p-Xylenes 160 pptv 10
m,p-Xylenes 0.71 ug/m3 0.043
Styrene 18 pptv 10
Styrene 0.076 ug/m3 0.043
o-Xylene 65 pptv 10
o-Xylene 0.28 ug/m3 0.043
1,3,5-Trimethylbenzene 11 pptv 10
1,3,5-Trimethylbenzene 0.055 ug/m3 0.049
1,2,4-Trimethylbenzene 48 pptv 10
1,2,4-Trimethylbenzene 0.24 ug/m3 0.049
Xylene (total) 230 pptv 10
Xylene (total) 0.99 ug/m3 0.043
4 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 7 of 63 Sample ID: WB04-14D Lab ID: 518235-004 Collected: 10/15/24 11:50 Matrix: Air
518235-004 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 470 pptv 10
Freon 12 2.3 ug/m3 0.049
Chloromethane 490 pptv 100
Chloromethane 1.0 ug/m3 0.21
Freon 114 16 pptv 10
Freon 114 0.12 ug/m3 0.070
Bromomethane 19 pptv 10
Bromomethane 0.075 ug/m3 0.039
Trichlorofluoromethane 200 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 340 pptv 20
Methylene Chloride 1.2 ug/m3 0.069
Freon 113 61 pptv 10
Freon 113 0.47 ug/m3 0.077
Chloroform 33 pptv 10
Chloroform 0.16 ug/m3 0.049
1,2-Dichloroethane 15 pptv 10
1,2-Dichloroethane 0.062 ug/m3 0.040
Benzene 230 pptv 10
Benzene 0.74 ug/m3 0.032
Carbon Tetrachloride 75 pptv 10
Carbon Tetrachloride 0.47 ug/m3 0.063
Toluene 380 pptv 10
Toluene 1.4 ug/m3 0.038
Ethylbenzene 60 pptv 10
Ethylbenzene 0.26 ug/m3 0.043
m,p-Xylenes 180 pptv 10
m,p-Xylenes 0.76 ug/m3 0.043
Styrene 25 pptv 10
Styrene 0.11 ug/m3 0.043
o-Xylene 69 pptv 10
o-Xylene 0.30 ug/m3 0.043
1,3,5-Trimethylbenzene 13 pptv 10
1,3,5-Trimethylbenzene 0.065 ug/m3 0.049
1,2,4-Trimethylbenzene 59 pptv 10
1,2,4-Trimethylbenzene 0.29 ug/m3 0.049
Xylene (total) 240 pptv 10
Xylene (total) 1.1 ug/m3 0.043
5 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 8 of 63 Sample ID: WB05-14D Lab ID: 518235-005 Collected: 10/15/24 12:01 Matrix: Air
518235-005 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 460 pptv 12
Freon 12 2.3 ug/m3 0.059
Chloromethane 480 pptv 120
Chloromethane 1.0 ug/m3 0.25
Freon 114 16 pptv 12
Freon 114 0.11 ug/m3 0.084
Bromomethane 22 pptv 12
Bromomethane 0.084 ug/m3 0.047
Trichlorofluoromethane 190 pptv 12
Trichlorofluoromethane 1.1 ug/m3 0.067
Methylene Chloride 220 pptv 24
Methylene Chloride 0.76 ug/m3 0.083
Freon 113 61 pptv 12
Freon 113 0.46 ug/m3 0.092
Chloroform 32 pptv 12
Chloroform 0.16 ug/m3 0.059
1,2-Dichloroethane 15 pptv 12
1,2-Dichloroethane 0.061 ug/m3 0.049
Benzene 1,000 pptv 12
Benzene 3.2 ug/m3 0.038
Carbon Tetrachloride 73 pptv 12
Carbon Tetrachloride 0.46 ug/m3 0.075
Toluene 1,500 pptv 12
Toluene 5.8 ug/m3 0.045
Ethylbenzene 59 pptv 12
Ethylbenzene 0.26 ug/m3 0.052
m,p-Xylenes 170 pptv 12
m,p-Xylenes 0.73 ug/m3 0.052
Styrene 30 pptv 12
Styrene 0.13 ug/m3 0.051
o-Xylene 66 pptv 12
o-Xylene 0.29 ug/m3 0.052
1,3,5-Trimethylbenzene 15 pptv 12
1,3,5-Trimethylbenzene 0.074 ug/m3 0.059
1,2,4-Trimethylbenzene 59 pptv 12
1,2,4-Trimethylbenzene 0.29 ug/m3 0.059
Naphthalene 14 pptv 12
Naphthalene 0.074 ug/m3 0.063
Xylene (total) 230 pptv 12
Xylene (total) 1.0 ug/m3 0.052
6 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 9 of 63 Sample ID: WB06-14D Lab ID: 518235-006 Collected: 10/15/24 11:56 Matrix: Air
518235-006 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 470 pptv 10
Freon 12 2.3 ug/m3 0.049
Chloromethane 480 pptv 100
Chloromethane 1.0 ug/m3 0.21
Freon 114 17 pptv 10
Freon 114 0.12 ug/m3 0.070
Bromomethane 21 pptv 10
Bromomethane 0.081 ug/m3 0.039
Chloroethane 17 pptv 10
Chloroethane 0.045 ug/m3 0.026
Trichlorofluoromethane 190 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 180 pptv 20
Methylene Chloride 0.62 ug/m3 0.069
Freon 113 61 pptv 10
Freon 113 0.46 ug/m3 0.077
Chloroform 31 pptv 10
Chloroform 0.15 ug/m3 0.049
1,2-Dichloroethane 15 pptv 10
1,2-Dichloroethane 0.062 ug/m3 0.040
Benzene 230 pptv 10
Benzene 0.74 ug/m3 0.032
Carbon Tetrachloride 74 pptv 10
Carbon Tetrachloride 0.47 ug/m3 0.063
Toluene 420 pptv 10
Toluene 1.6 ug/m3 0.038
Ethylbenzene 64 pptv 10
Ethylbenzene 0.28 ug/m3 0.043
m,p-Xylenes 170 pptv 10
m,p-Xylenes 0.74 ug/m3 0.043
Styrene 26 pptv 10
Styrene 0.11 ug/m3 0.043
o-Xylene 66 pptv 10
o-Xylene 0.29 ug/m3 0.043
1,3,5-Trimethylbenzene 13 pptv 10
1,3,5-Trimethylbenzene 0.065 ug/m3 0.049
1,2,4-Trimethylbenzene 54 pptv 10
1,2,4-Trimethylbenzene 0.26 ug/m3 0.049
Xylene (total) 240 pptv 10
Xylene (total) 1.0 ug/m3 0.043
7 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 10 of 63 Sample ID: WB07-14D Lab ID: 518235-007 Collected: 10/15/24 12:06 Matrix: Air
518235-007 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 460 pptv 10
Freon 12 2.3 ug/m3 0.049
Chloromethane 480 pptv 100
Chloromethane 0.99 ug/m3 0.21
Freon 114 17 pptv 10
Freon 114 0.12 ug/m3 0.070
Bromomethane 22 pptv 10
Bromomethane 0.085 ug/m3 0.039
Chloroethane 33 pptv 10
Chloroethane 0.088 ug/m3 0.026
Trichlorofluoromethane 190 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 190 pptv 20
Methylene Chloride 0.67 ug/m3 0.069
Freon 113 60 pptv 10
Freon 113 0.46 ug/m3 0.077
Chloroform 29 pptv 10
Chloroform 0.14 ug/m3 0.049
1,2-Dichloroethane 15 pptv 10
1,2-Dichloroethane 0.061 ug/m3 0.040
Benzene 220 pptv 10
Benzene 0.72 ug/m3 0.032
Carbon Tetrachloride 73 pptv 10
Carbon Tetrachloride 0.46 ug/m3 0.063
Toluene 390 pptv 10
Toluene 1.5 ug/m3 0.038
Ethylbenzene 60 pptv 10
Ethylbenzene 0.26 ug/m3 0.043
m,p-Xylenes 160 pptv 10
m,p-Xylenes 0.71 ug/m3 0.043
Styrene 29 pptv 10
Styrene 0.12 ug/m3 0.043
o-Xylene 65 pptv 10
o-Xylene 0.28 ug/m3 0.043
1,3,5-Trimethylbenzene 13 pptv 10
1,3,5-Trimethylbenzene 0.065 ug/m3 0.049
1,2,4-Trimethylbenzene 58 pptv 10
1,2,4-Trimethylbenzene 0.29 ug/m3 0.049
Naphthalene 11 pptv 10
Naphthalene 0.059 ug/m3 0.052
Xylene (total) 230 pptv 10
Xylene (total) 0.99 ug/m3 0.043
8 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 11 of 63 Sample ID: WB08-14D Lab ID: 518235-008 Collected: 10/15/24 12:11 Matrix: Air
518235-008 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 470 pptv 11
Freon 12 2.3 ug/m3 0.054
Chloromethane 490 pptv 110
Chloromethane 1.0 ug/m3 0.23
Freon 114 17 pptv 11
Freon 114 0.12 ug/m3 0.077
Bromomethane 21 pptv 11
Bromomethane 0.080 ug/m3 0.043
Chloroethane 22 pptv 11
Chloroethane 0.058 ug/m3 0.029
Trichlorofluoromethane 200 pptv 11
Trichlorofluoromethane 1.1 ug/m3 0.062
Methylene Chloride 210 pptv 22
Methylene Chloride 0.74 ug/m3 0.076
Freon 113 61 pptv 11
Freon 113 0.47 ug/m3 0.084
Chloroform 28 pptv 11
Chloroform 0.14 ug/m3 0.054
1,2-Dichloroethane 15 pptv 11
1,2-Dichloroethane 0.062 ug/m3 0.045
Benzene 230 pptv 11
Benzene 0.74 ug/m3 0.035
Carbon Tetrachloride 74 pptv 11
Carbon Tetrachloride 0.47 ug/m3 0.069
Toluene 400 pptv 11
Toluene 1.5 ug/m3 0.041
Ethylbenzene 59 pptv 11
Ethylbenzene 0.26 ug/m3 0.048
m,p-Xylenes 160 pptv 11
m,p-Xylenes 0.70 ug/m3 0.048
Styrene 23 pptv 11
Styrene 0.099 ug/m3 0.047
o-Xylene 65 pptv 11
o-Xylene 0.28 ug/m3 0.048
1,3,5-Trimethylbenzene 12 pptv 11
1,3,5-Trimethylbenzene 0.061 ug/m3 0.054
1,2,4-Trimethylbenzene 54 pptv 11
1,2,4-Trimethylbenzene 0.27 ug/m3 0.054
Xylene (total) 230 pptv 11
Xylene (total) 0.98 ug/m3 0.048
9 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 12 of 63 Sample ID: WB09-14D Lab ID: 518235-009 Collected: 10/15/24 11:05 Matrix: Air
518235-009 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 470 pptv 10
Freon 12 2.3 ug/m3 0.049
Chloromethane 490 pptv 100
Chloromethane 1.0 ug/m3 0.21
Freon 114 17 pptv 10
Freon 114 0.12 ug/m3 0.070
Bromomethane 24 pptv 10
Bromomethane 0.092 ug/m3 0.039
Chloroethane 16 pptv 10
Chloroethane 0.042 ug/m3 0.026
Trichlorofluoromethane 200 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 820 pptv 20
Methylene Chloride 2.8 ug/m3 0.069
Freon 113 61 pptv 10
Freon 113 0.47 ug/m3 0.077
Chloroform 37 pptv 10
Chloroform 0.18 ug/m3 0.049
1,2-Dichloroethane 16 pptv 10
1,2-Dichloroethane 0.063 ug/m3 0.040
Benzene 250 pptv 10
Benzene 0.81 ug/m3 0.032
Carbon Tetrachloride 74 pptv 10
Carbon Tetrachloride 0.47 ug/m3 0.063
Toluene 420 pptv 10
Toluene 1.6 ug/m3 0.038
Ethylbenzene 62 pptv 10
Ethylbenzene 0.27 ug/m3 0.043
m,p-Xylenes 180 pptv 10
m,p-Xylenes 0.79 ug/m3 0.043
Styrene 29 pptv 10
Styrene 0.12 ug/m3 0.043
o-Xylene 72 pptv 10
o-Xylene 0.31 ug/m3 0.043
1,3,5-Trimethylbenzene 14 pptv 10
1,3,5-Trimethylbenzene 0.068 ug/m3 0.049
1,2,4-Trimethylbenzene 59 pptv 10
1,2,4-Trimethylbenzene 0.29 ug/m3 0.049
Naphthalene 15 pptv 10
Naphthalene 0.078 ug/m3 0.052
Xylene (total) 250 pptv 10
Xylene (total) 1.1 ug/m3 0.043
10 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 13 of 63 Sample ID: WB10-14D Lab ID: 518235-010 Collected: 10/15/24 11:12 Matrix: Air
518235-010 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 460 pptv 10
Freon 12 2.3 ug/m3 0.049
Chloromethane 480 pptv 100
Chloromethane 0.98 ug/m3 0.21
Freon 114 17 pptv 10
Freon 114 0.12 ug/m3 0.070
Bromomethane 21 pptv 10
Bromomethane 0.083 ug/m3 0.039
Trichlorofluoromethane 190 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 250 pptv 20
Methylene Chloride 0.85 ug/m3 0.069
Freon 113 60 pptv 10
Freon 113 0.46 ug/m3 0.077
Chloroform 31 pptv 10
Chloroform 0.15 ug/m3 0.049
1,2-Dichloroethane 18 pptv 10
1,2-Dichloroethane 0.072 ug/m3 0.040
Benzene 310 pptv 10
Benzene 0.99 ug/m3 0.032
Carbon Tetrachloride 73 pptv 10
Carbon Tetrachloride 0.46 ug/m3 0.063
Toluene 350 pptv 10
Toluene 1.3 ug/m3 0.038
Ethylbenzene 100 pptv 10
Ethylbenzene 0.45 ug/m3 0.043
m,p-Xylenes 270 pptv 10
m,p-Xylenes 1.2 ug/m3 0.043
Styrene 32 pptv 10
Styrene 0.13 ug/m3 0.043
o-Xylene 84 pptv 10
o-Xylene 0.37 ug/m3 0.043
1,3,5-Trimethylbenzene 28 pptv 10
1,3,5-Trimethylbenzene 0.14 ug/m3 0.049
1,2,4-Trimethylbenzene 100 pptv 10
1,2,4-Trimethylbenzene 0.50 ug/m3 0.049
Naphthalene 26 pptv 10
Naphthalene 0.14 ug/m3 0.052
Xylene (total) 350 pptv 10
Xylene (total) 1.5 ug/m3 0.043
11 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 14 of 63 Sample ID: WB11-14D Lab ID: 518235-011 Collected: 10/15/24 11:16 Matrix: Air
518235-011 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 470 pptv 10
Freon 12 2.3 ug/m3 0.049
Chloromethane 490 pptv 100
Chloromethane 1.0 ug/m3 0.21
Freon 114 17 pptv 10
Freon 114 0.12 ug/m3 0.070
Bromomethane 23 pptv 10
Bromomethane 0.089 ug/m3 0.039
Chloroethane 34 pptv 10
Chloroethane 0.089 ug/m3 0.026
Trichlorofluoromethane 190 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 160 pptv 20
Methylene Chloride 0.57 ug/m3 0.069
Freon 113 61 pptv 10
Freon 113 0.47 ug/m3 0.077
Chloroform 29 pptv 10
Chloroform 0.14 ug/m3 0.049
1,2-Dichloroethane 15 pptv 10
1,2-Dichloroethane 0.061 ug/m3 0.040
Benzene 240 pptv 10
Benzene 0.78 ug/m3 0.032
Carbon Tetrachloride 74 pptv 10
Carbon Tetrachloride 0.47 ug/m3 0.063
Toluene 440 pptv 10
Toluene 1.6 ug/m3 0.038
Ethylbenzene 61 pptv 10
Ethylbenzene 0.27 ug/m3 0.043
m,p-Xylenes 180 pptv 10
m,p-Xylenes 0.78 ug/m3 0.043
Styrene 31 pptv 10
Styrene 0.13 ug/m3 0.043
o-Xylene 70 pptv 10
o-Xylene 0.31 ug/m3 0.043
1,3,5-Trimethylbenzene 15 pptv 10
1,3,5-Trimethylbenzene 0.073 ug/m3 0.049
1,2,4-Trimethylbenzene 60 pptv 10
1,2,4-Trimethylbenzene 0.30 ug/m3 0.049
Naphthalene 16 pptv 10
Naphthalene 0.086 ug/m3 0.052
Xylene (total) 250 pptv 10
Xylene (total) 1.1 ug/m3 0.043
12 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 15 of 63 Sample ID: WB12-14D Lab ID: 518235-012 Collected: 10/15/24 11:20 Matrix: Air
518235-012 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 460 pptv 10
Freon 12 2.3 ug/m3 0.049
Chloromethane 490 pptv 100
Chloromethane 1.0 ug/m3 0.21
Freon 114 17 pptv 10
Freon 114 0.12 ug/m3 0.070
Bromomethane 21 pptv 10
Bromomethane 0.081 ug/m3 0.039
Chloroethane 39 pptv 10
Chloroethane 0.10 ug/m3 0.026
Trichlorofluoromethane 190 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 160 pptv 20
Methylene Chloride 0.57 ug/m3 0.069
Freon 113 61 pptv 10
Freon 113 0.46 ug/m3 0.077
Chloroform 29 pptv 10
Chloroform 0.14 ug/m3 0.049
1,2-Dichloroethane 15 pptv 10
1,2-Dichloroethane 0.062 ug/m3 0.040
Benzene 270 pptv 10
Benzene 0.85 ug/m3 0.032
Carbon Tetrachloride 73 pptv 10
Carbon Tetrachloride 0.46 ug/m3 0.063
Toluene 490 pptv 10
Toluene 1.9 ug/m3 0.038
Ethylbenzene 68 pptv 10
Ethylbenzene 0.29 ug/m3 0.043
m,p-Xylenes 190 pptv 10
m,p-Xylenes 0.83 ug/m3 0.043
Styrene 32 pptv 10
Styrene 0.14 ug/m3 0.043
o-Xylene 75 pptv 10
o-Xylene 0.33 ug/m3 0.043
1,3,5-Trimethylbenzene 15 pptv 10
1,3,5-Trimethylbenzene 0.074 ug/m3 0.049
1,2,4-Trimethylbenzene 64 pptv 10
1,2,4-Trimethylbenzene 0.32 ug/m3 0.049
Naphthalene 11 pptv 10
Naphthalene 0.059 ug/m3 0.052
Xylene (total) 270 pptv 10
Xylene (total) 1.2 ug/m3 0.043
13 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 16 of 63 Sample ID: WB13-14D Lab ID: 518235-013 Collected: 10/15/24 11:24 Matrix: Air
518235-013 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 460 pptv 11
Freon 12 2.3 ug/m3 0.054
Chloromethane 490 pptv 110
Chloromethane 1.0 ug/m3 0.23
Freon 114 16 pptv 11
Freon 114 0.11 ug/m3 0.077
Bromomethane 21 pptv 11
Bromomethane 0.083 ug/m3 0.043
Trichlorofluoromethane 190 pptv 11
Trichlorofluoromethane 1.1 ug/m3 0.062
Methylene Chloride 170 pptv 22
Methylene Chloride 0.60 ug/m3 0.076
Freon 113 59 pptv 11
Freon 113 0.46 ug/m3 0.084
Chloroform 35 pptv 11
Chloroform 0.17 ug/m3 0.054
1,2-Dichloroethane 16 pptv 11
1,2-Dichloroethane 0.065 ug/m3 0.045
Benzene 280 pptv 11
Benzene 0.89 ug/m3 0.035
Carbon Tetrachloride 72 pptv 11
Carbon Tetrachloride 0.46 ug/m3 0.069
Toluene 530 pptv 11
Toluene 2.0 ug/m3 0.041
Tetrachloroethene 12 pptv 11
Tetrachloroethene 0.080 ug/m3 0.075
Ethylbenzene 72 pptv 11
Ethylbenzene 0.31 ug/m3 0.048
m,p-Xylenes 220 pptv 11
m,p-Xylenes 0.94 ug/m3 0.048
Styrene 76 pptv 11
Styrene 0.32 ug/m3 0.047
o-Xylene 86 pptv 11
o-Xylene 0.37 ug/m3 0.048
1,3,5-Trimethylbenzene 17 pptv 11
1,3,5-Trimethylbenzene 0.085 ug/m3 0.054
1,2,4-Trimethylbenzene 72 pptv 11
1,2,4-Trimethylbenzene 0.35 ug/m3 0.054
Naphthalene 23 pptv 11
Naphthalene 0.12 ug/m3 0.058
Xylene (total) 300 pptv 11
Xylene (total) 1.3 ug/m3 0.048
14 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 17 of 63 Sample ID: WB14-14D Lab ID: 518235-014 Collected: 10/15/24 11:28 Matrix: Air
518235-014 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 460 pptv 10
Freon 12 2.3 ug/m3 0.049
Chloromethane 490 pptv 100
Chloromethane 1.0 ug/m3 0.21
Freon 114 16 pptv 10
Freon 114 0.11 ug/m3 0.070
Bromomethane 22 pptv 10
Bromomethane 0.085 ug/m3 0.039
Trichlorofluoromethane 190 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 170 pptv 20
Methylene Chloride 0.59 ug/m3 0.069
Freon 113 60 pptv 10
Freon 113 0.46 ug/m3 0.077
Chloroform 27 pptv 10
Chloroform 0.13 ug/m3 0.049
1,2-Dichloroethane 16 pptv 10
1,2-Dichloroethane 0.063 ug/m3 0.040
Benzene 240 pptv 10
Benzene 0.78 ug/m3 0.032
Carbon Tetrachloride 73 pptv 10
Carbon Tetrachloride 0.46 ug/m3 0.063
Toluene 350 pptv 10
Toluene 1.3 ug/m3 0.038
Ethylbenzene 60 pptv 10
Ethylbenzene 0.26 ug/m3 0.043
m,p-Xylenes 170 pptv 10
m,p-Xylenes 0.75 ug/m3 0.043
Styrene 20 pptv 10
Styrene 0.086 ug/m3 0.043
o-Xylene 68 pptv 10
o-Xylene 0.30 ug/m3 0.043
1,3,5-Trimethylbenzene 14 pptv 10
1,3,5-Trimethylbenzene 0.067 ug/m3 0.049
1,2,4-Trimethylbenzene 55 pptv 10
1,2,4-Trimethylbenzene 0.27 ug/m3 0.049
Naphthalene 11 pptv 10
Naphthalene 0.057 ug/m3 0.052
Xylene (total) 240 pptv 10
Xylene (total) 1.1 ug/m3 0.043
15 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 18 of 63 Sample ID: WB17-14D Lab ID: 518235-015 Collected: 10/15/24 09:40 Matrix: Air
518235-015 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 460 pptv 11
Freon 12 2.3 ug/m3 0.054
Chloromethane 480 pptv 110
Chloromethane 1.0 ug/m3 0.23
Freon 114 16 pptv 11
Freon 114 0.11 ug/m3 0.077
Bromomethane 22 pptv 11
Bromomethane 0.084 ug/m3 0.043
Chloroethane 12 pptv 11
Chloroethane 0.032 ug/m3 0.029
Trichlorofluoromethane 190 pptv 11
Trichlorofluoromethane 1.1 ug/m3 0.062
Methylene Chloride 150 pptv 22
Methylene Chloride 0.53 ug/m3 0.076
Freon 113 60 pptv 11
Freon 113 0.46 ug/m3 0.084
Chloroform 29 pptv 11
Chloroform 0.14 ug/m3 0.054
1,2-Dichloroethane 15 pptv 11
1,2-Dichloroethane 0.062 ug/m3 0.045
Benzene 260 pptv 11
Benzene 0.82 ug/m3 0.035
Carbon Tetrachloride 72 pptv 11
Carbon Tetrachloride 0.46 ug/m3 0.069
Toluene 450 pptv 11
Toluene 1.7 ug/m3 0.041
Ethylbenzene 69 pptv 11
Ethylbenzene 0.30 ug/m3 0.048
m,p-Xylenes 200 pptv 11
m,p-Xylenes 0.89 ug/m3 0.048
Styrene 30 pptv 11
Styrene 0.13 ug/m3 0.047
o-Xylene 81 pptv 11
o-Xylene 0.35 ug/m3 0.048
1,3,5-Trimethylbenzene 17 pptv 11
1,3,5-Trimethylbenzene 0.085 ug/m3 0.054
1,2,4-Trimethylbenzene 67 pptv 11
1,2,4-Trimethylbenzene 0.33 ug/m3 0.054
Naphthalene 14 pptv 11
Naphthalene 0.072 ug/m3 0.058
Xylene (total) 290 pptv 11
Xylene (total) 1.2 ug/m3 0.048
16 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 19 of 63 Sample ID: WB18-14D Lab ID: 518235-016 Collected: 10/15/24 10:28 Matrix: Air
518235-016 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 480 pptv 12
Freon 12 2.4 ug/m3 0.059
Chloromethane 510 pptv 120
Chloromethane 1.1 ug/m3 0.25
Freon 114 17 pptv 12
Freon 114 0.12 ug/m3 0.084
Bromomethane 28 pptv 12
Bromomethane 0.11 ug/m3 0.047
Chloroethane 13 pptv 12
Chloroethane 0.035 ug/m3 0.032
Trichlorofluoromethane 200 pptv 12
Trichlorofluoromethane 1.1 ug/m3 0.067
Methylene Chloride 160 pptv 24
Methylene Chloride 0.56 ug/m3 0.083
Freon 113 62 pptv 12
Freon 113 0.47 ug/m3 0.092
Chloroform 29 pptv 12
Chloroform 0.14 ug/m3 0.059
1,2-Dichloroethane 15 pptv 12
1,2-Dichloroethane 0.062 ug/m3 0.049
Benzene 250 pptv 12
Benzene 0.79 ug/m3 0.038
Carbon Tetrachloride 75 pptv 12
Carbon Tetrachloride 0.47 ug/m3 0.075
Toluene 440 pptv 12
Toluene 1.7 ug/m3 0.045
Ethylbenzene 68 pptv 12
Ethylbenzene 0.30 ug/m3 0.052
m,p-Xylenes 200 pptv 12
m,p-Xylenes 0.88 ug/m3 0.052
Styrene 31 pptv 12
Styrene 0.13 ug/m3 0.051
o-Xylene 81 pptv 12
o-Xylene 0.35 ug/m3 0.052
1,3,5-Trimethylbenzene 22 pptv 12
1,3,5-Trimethylbenzene 0.11 ug/m3 0.059
1,2,4-Trimethylbenzene 89 pptv 12
1,2,4-Trimethylbenzene 0.44 ug/m3 0.059
Naphthalene 14 pptv 12
Naphthalene 0.073 ug/m3 0.063
Xylene (total) 280 pptv 12
Xylene (total) 1.2 ug/m3 0.052
17 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 20 of 63 Sample ID: WB19-14D Lab ID: 518235-017 Collected: 10/15/24 14:44 Matrix: Air
518235-017 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 460 pptv 11
Freon 12 2.3 ug/m3 0.054
Chloromethane 500 pptv 110
Chloromethane 1.0 ug/m3 0.23
Freon 114 16 pptv 11
Freon 114 0.11 ug/m3 0.077
Bromomethane 21 pptv 11
Bromomethane 0.080 ug/m3 0.043
Chloroethane 26 pptv 11
Chloroethane 0.069 ug/m3 0.029
Trichlorofluoromethane 190 pptv 11
Trichlorofluoromethane 1.1 ug/m3 0.062
Methylene Chloride 140 pptv 22
Methylene Chloride 0.50 ug/m3 0.076
Freon 113 59 pptv 11
Freon 113 0.45 ug/m3 0.084
Chloroform 27 pptv 11
Chloroform 0.13 ug/m3 0.054
1,2-Dichloroethane 17 pptv 11
1,2-Dichloroethane 0.067 ug/m3 0.045
Benzene 320 pptv 11
Benzene 1.0 ug/m3 0.035
Carbon Tetrachloride 71 pptv 11
Carbon Tetrachloride 0.45 ug/m3 0.069
Toluene 480 pptv 11
Toluene 1.8 ug/m3 0.041
Ethylbenzene 72 pptv 11
Ethylbenzene 0.31 ug/m3 0.048
m,p-Xylenes 220 pptv 11
m,p-Xylenes 0.95 ug/m3 0.048
Styrene 42 pptv 11
Styrene 0.18 ug/m3 0.047
o-Xylene 86 pptv 11
o-Xylene 0.37 ug/m3 0.048
1,3,5-Trimethylbenzene 17 pptv 11
1,3,5-Trimethylbenzene 0.081 ug/m3 0.054
1,2,4-Trimethylbenzene 62 pptv 11
1,2,4-Trimethylbenzene 0.30 ug/m3 0.054
Xylene (total) 300 pptv 11
Xylene (total) 1.3 ug/m3 0.048
18 of 18 v23.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 21 of 63 UTFUFo
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SAMPLE RECEIPT CH ECKLIST -ga

LN I HALI'Y
Section 1: General lnfo
Date Received | 101 15124 yys6 5'18235 Client: Catalyst Environmental Solutions Section 2: Shipping / Custody
Custody seals intact on arrival? El N/A il Yes E No
Are custody seals present? E Yes EJ No
- On cooler / box - On samples
Shipping lnfo:

Section 3a: Condition / Packaging E outside 0.0 - 6.0"C (0.0 - 10.0"C for microbioloCy) (PM notified) Date opened 10115124 By (initials) TLK Type of ice used : E Wet E Blue/Gel E None E Samples received on ice directly from the field; cooling process had begun. (if checked, skip temperatures) E Sample matrix doesn't require cooling (e.g. air, bulk PCB). (if checked, skip temperatures) lf no cooler: Observed/Adjusted Temp ("C): _ I _ Thermometer/lR Gun CF:_ CoolerTemp (C)#1: / #2: I fr3: / #4: / #5: / #6: /
Section 3b: Microbiology Samples
tr Within temp range 0.0 - 10.0'C or received on ice directly from field.

E Adequate headspace for microbiology analysis.

E No microbiology samples submitted (skip 3b)
Section 3c: Air Samples
E 1.41 Canisters E 6L Canisters
E No air samples submitted (skip 3c)
!TedlarBagsEucrcassettesflSorbentTubes-otherSection 4: Containers / tabels / Samples YES NO N/A 1) Were custody papers present, filled properly, and legible? x 2) ls the sampler's name present on the CoC? x
3) Were containers received in good condition (unbroken / unopened / uncompromised)? x 4) Were the samples bagged? (required for microbiology samples; recommended for soil samples) x 5) Were all ol and only, the correct samples received? x 5) Are sample labels present, legible, and in agreement with the CoC? x 7) Does the container count match the CoC?
8) Was sufficient sample volume / mass received for the analyses requested? x
x
9) Were samples received in proper containers for the analyses requested? x 10) Were samples received with > 1/2 holding time remaining? x 11) Are samples properly preserved as indicated by CoC / labels? x 12) Unpreserved VOAs received - lf necessary, was the hold time changed in LIMS? x 13) Are VOA vials free from headspace/bubbles > 5mm? x
Section 5: Explanations / Comments E)PM notified
Sample 17 did not have a corresponding label on any container. Sample determined via canister lD Date Logged 10t15124 Tris
Date labeled 10115t24
By
By Tris Kelly
,/7-2
Enthalpy Analytical J-0005, Rev 2: Form Version 76,1087224 24 of 63
Field ID: WB01-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-001 Sampled: 10/15/24 11:37 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.100 Analyzed: 10/16/24 10:34
518235-001 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 460 11 pptv 2.3 0.054 ug/m3
Chloromethane 480 110 pptv 0.99 0.23 ug/m3
Freon 114 16 11 pptv 0.11 0.077 ug/m3
Vinyl Chloride ND 11 pptv ND 0.028 ug/m3
Bromomethane 21 11 pptv 0.080 0.043 ug/m3
Chloroethane ND 11 pptv ND 0.029 ug/m3
Vinyl bromide ND 11 pptv ND 0.048 ug/m3
Trichlorofluoromethane 190 11 pptv 1.1 0.062 ug/m3
1,1-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Methylene Chloride 160 22 pptv 0.55 0.076 ug/m3
Freon 113 60 11 pptv 0.46 0.084 ug/m3
trans-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
1,1-Dichloroethane ND 11 pptv ND 0.045 ug/m3
cis-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Chloroform 28 11 pptv 0.14 0.054 ug/m3
1,2-Dichloroethane 16 11 pptv 0.063 0.045 ug/m3
1,1,1-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Benzene 250 11 pptv 0.80 0.035 ug/m3
Carbon Tetrachloride 73 11 pptv 0.46 0.069 ug/m3
1,2-Dichloropropane ND 11 pptv ND 0.051 ug/m3
Bromodichloromethane ND 11 pptv ND 0.074 ug/m3
Trichloroethene ND 11 pptv ND 0.059 ug/m3
cis-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
trans-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
1,1,2-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Toluene 360 11 pptv 1.4 0.041 ug/m3
Dibromochloromethane ND 11 pptv ND 0.094 ug/m3
1,2-Dibromoethane ND 11 pptv ND 0.085 ug/m3
Tetrachloroethene ND 11 pptv ND 0.075 ug/m3
Chlorobenzene ND 11 pptv ND 0.051 ug/m3
Ethylbenzene 63 11 pptv 0.27 0.048 ug/m3
m,p-Xylenes 180 11 pptv 0.79 0.048 ug/m3
Bromoform ND 11 pptv ND 0.11 ug/m3
Styrene 24 11 pptv 0.10 0.047 ug/m3
o-Xylene 73 11 pptv 0.32 0.048 ug/m3
2-Chlorotoluene ND 11 pptv ND 0.057 ug/m3
1,3,5-Trimethylbenzene 15 11 pptv 0.074 0.054 ug/m3
1,2,4-Trimethylbenzene 61 11 pptv 0.30 0.054 ug/m3
Benzyl chloride ND 11 pptv ND 0.057 ug/m3
1,3-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,4-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,2-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,2,4-Trichlorobenzene ND 11 pptv ND 0.082 ug/m3
1,1,2,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
1,1,1,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
Naphthalene 11 11 pptv 0.059 0.058 ug/m3
1 of 2 v2
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 25 of 63
Hexachlorobutadiene ND 11 pptv ND 0.12 ug/m3
Xylene (total) 250 11 pptv 1.1 0.048 ug/m3
518235-001 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-001 Surrogate %REC Limits Units (M)
Bromofluorobenzene 94 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v2
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 26 of 63
Field ID: WB02-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-002 Sampled: 10/15/24 11:34 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 10/16/24 11:41
518235-002 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 470 10 pptv 2.3 0.049 ug/m3
Chloromethane 480 100 pptv 0.99 0.21 ug/m3
Freon 114 16 10 pptv 0.12 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 22 10 pptv 0.084 0.039 ug/m3
Chloroethane 19 10 pptv 0.049 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 180 10 pptv 1.0 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 170 20 pptv 0.60 0.069 ug/m3
Freon 113 58 10 pptv 0.44 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 32 10 pptv 0.16 0.049 ug/m3
1,2-Dichloroethane 16 10 pptv 0.066 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 260 10 pptv 0.83 0.032 ug/m3
Carbon Tetrachloride 71 10 pptv 0.45 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 410 10 pptv 1.5 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 75 10 pptv 0.33 0.043 ug/m3
m,p-Xylenes 210 10 pptv 0.90 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 28 10 pptv 0.12 0.043 ug/m3
o-Xylene 82 10 pptv 0.35 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 20 10 pptv 0.10 0.049 ug/m3
1,2,4-Trimethylbenzene 74 10 pptv 0.37 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene 15 10 pptv 0.077 0.052 ug/m3
1 of 2 v3
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 27 of 63
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 290 10 pptv 1.3 0.043 ug/m3
518235-002 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-002 Surrogate %REC Limits Units (M)
Bromofluorobenzene 95 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v3
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 28 of 63
Field ID: WB03-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-003 Sampled: 10/15/24 11:46 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 10/16/24 13:06
518235-003 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 470 10 pptv 2.3 0.049 ug/m3
Chloromethane 490 100 pptv 1.0 0.21 ug/m3
Freon 114 17 10 pptv 0.12 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 21 10 pptv 0.082 0.039 ug/m3
Chloroethane ND 10 pptv ND 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 200 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 170 20 pptv 0.59 0.069 ug/m3
Freon 113 61 10 pptv 0.47 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 34 10 pptv 0.17 0.049 ug/m3
1,2-Dichloroethane 15 10 pptv 0.062 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 230 10 pptv 0.72 0.032 ug/m3
Carbon Tetrachloride 75 10 pptv 0.47 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 330 10 pptv 1.2 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 57 10 pptv 0.25 0.043 ug/m3
m,p-Xylenes 160 10 pptv 0.71 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 18 10 pptv 0.076 0.043 ug/m3
o-Xylene 65 10 pptv 0.28 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 11 10 pptv 0.055 0.049 ug/m3
1,2,4-Trimethylbenzene 48 10 pptv 0.24 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene ND 10 pptv ND 0.052 ug/m3
1 of 2 v4.001
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 29 of 63
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 230 10 pptv 0.99 0.043 ug/m3
518235-003 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-003 Surrogate %REC Limits Units (M)
Bromofluorobenzene 96 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v4.001
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 30 of 63
Field ID: WB04-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-004 Sampled: 10/15/24 11:50 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 10/16/24 13:55
518235-004 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 470 10 pptv 2.3 0.049 ug/m3
Chloromethane 490 100 pptv 1.0 0.21 ug/m3
Freon 114 16 10 pptv 0.12 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 19 10 pptv 0.075 0.039 ug/m3
Chloroethane ND 10 pptv ND 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 200 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 340 20 pptv 1.2 0.069 ug/m3
Freon 113 61 10 pptv 0.47 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 33 10 pptv 0.16 0.049 ug/m3
1,2-Dichloroethane 15 10 pptv 0.062 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 230 10 pptv 0.74 0.032 ug/m3
Carbon Tetrachloride 75 10 pptv 0.47 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 380 10 pptv 1.4 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 60 10 pptv 0.26 0.043 ug/m3
m,p-Xylenes 180 10 pptv 0.76 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 25 10 pptv 0.11 0.043 ug/m3
o-Xylene 69 10 pptv 0.30 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 13 10 pptv 0.065 0.049 ug/m3
1,2,4-Trimethylbenzene 59 10 pptv 0.29 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene ND 10 pptv ND 0.052 ug/m3
1 of 2 v5
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 31 of 63
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 240 10 pptv 1.1 0.043 ug/m3
518235-004 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-004 Surrogate %REC Limits Units (M)
Bromofluorobenzene 94 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v5
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 32 of 63
Field ID: WB05-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-005 Sampled: 10/15/24 12:01 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.200 Analyzed: 10/16/24 14:44
518235-005 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 460 12 pptv 2.3 0.059 ug/m3
Chloromethane 480 120 pptv 1.0 0.25 ug/m3
Freon 114 16 12 pptv 0.11 0.084 ug/m3
Vinyl Chloride ND 12 pptv ND 0.031 ug/m3
Bromomethane 22 12 pptv 0.084 0.047 ug/m3
Chloroethane ND 12 pptv ND 0.032 ug/m3
Vinyl bromide ND 12 pptv ND 0.052 ug/m3
Trichlorofluoromethane 190 12 pptv 1.1 0.067 ug/m3
1,1-Dichloroethene ND 12 pptv ND 0.048 ug/m3
Methylene Chloride 220 24 pptv 0.76 0.083 ug/m3
Freon 113 61 12 pptv 0.46 0.092 ug/m3
trans-1,2-Dichloroethene ND 12 pptv ND 0.048 ug/m3
1,1-Dichloroethane ND 12 pptv ND 0.049 ug/m3
cis-1,2-Dichloroethene ND 12 pptv ND 0.048 ug/m3
Chloroform 32 12 pptv 0.16 0.059 ug/m3
1,2-Dichloroethane 15 12 pptv 0.061 0.049 ug/m3
1,1,1-Trichloroethane ND 12 pptv ND 0.065 ug/m3
Benzene 1,000 12 pptv 3.2 0.038 ug/m3
Carbon Tetrachloride 73 12 pptv 0.46 0.075 ug/m3
1,2-Dichloropropane ND 12 pptv ND 0.055 ug/m3
Bromodichloromethane ND 12 pptv ND 0.080 ug/m3
Trichloroethene ND 12 pptv ND 0.064 ug/m3
cis-1,3-Dichloropropene ND 12 pptv ND 0.054 ug/m3
trans-1,3-Dichloropropene ND 12 pptv ND 0.054 ug/m3
1,1,2-Trichloroethane ND 12 pptv ND 0.065 ug/m3
Toluene 1,500 12 pptv 5.8 0.045 ug/m3
Dibromochloromethane ND 12 pptv ND 0.10 ug/m3
1,2-Dibromoethane ND 12 pptv ND 0.092 ug/m3
Tetrachloroethene ND 12 pptv ND 0.081 ug/m3
Chlorobenzene ND 12 pptv ND 0.055 ug/m3
Ethylbenzene 59 12 pptv 0.26 0.052 ug/m3
m,p-Xylenes 170 12 pptv 0.73 0.052 ug/m3
Bromoform ND 12 pptv ND 0.12 ug/m3
Styrene 30 12 pptv 0.13 0.051 ug/m3
o-Xylene 66 12 pptv 0.29 0.052 ug/m3
2-Chlorotoluene ND 12 pptv ND 0.062 ug/m3
1,3,5-Trimethylbenzene 15 12 pptv 0.074 0.059 ug/m3
1,2,4-Trimethylbenzene 59 12 pptv 0.29 0.059 ug/m3
Benzyl chloride ND 12 pptv ND 0.062 ug/m3
1,3-Dichlorobenzene ND 12 pptv ND 0.072 ug/m3
1,4-Dichlorobenzene ND 12 pptv ND 0.072 ug/m3
1,2-Dichlorobenzene ND 12 pptv ND 0.072 ug/m3
1,2,4-Trichlorobenzene ND 12 pptv ND 0.089 ug/m3
1,1,2,2-Tetrachloroethane ND 12 pptv ND 0.082 ug/m3
1,1,1,2-Tetrachloroethane ND 12 pptv ND 0.082 ug/m3
Naphthalene 14 12 pptv 0.074 0.063 ug/m3
1 of 2 v6
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 33 of 63
Hexachlorobutadiene ND 12 pptv ND 0.13 ug/m3
Xylene (total) 230 12 pptv 1.0 0.052 ug/m3
518235-005 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-005 Surrogate %REC Limits Units (M)
Bromofluorobenzene 95 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v6
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 34 of 63
Field ID: WB06-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-006 Sampled: 10/15/24 11:56 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 10/16/24 15:33
518235-006 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 470 10 pptv 2.3 0.049 ug/m3
Chloromethane 480 100 pptv 1.0 0.21 ug/m3
Freon 114 17 10 pptv 0.12 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 21 10 pptv 0.081 0.039 ug/m3
Chloroethane 17 10 pptv 0.045 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 190 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 180 20 pptv 0.62 0.069 ug/m3
Freon 113 61 10 pptv 0.46 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 31 10 pptv 0.15 0.049 ug/m3
1,2-Dichloroethane 15 10 pptv 0.062 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 230 10 pptv 0.74 0.032 ug/m3
Carbon Tetrachloride 74 10 pptv 0.47 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 420 10 pptv 1.6 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 64 10 pptv 0.28 0.043 ug/m3
m,p-Xylenes 170 10 pptv 0.74 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 26 10 pptv 0.11 0.043 ug/m3
o-Xylene 66 10 pptv 0.29 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 13 10 pptv 0.065 0.049 ug/m3
1,2,4-Trimethylbenzene 54 10 pptv 0.26 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene ND 10 pptv ND 0.052 ug/m3
1 of 2 v7
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 35 of 63
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 240 10 pptv 1.0 0.043 ug/m3
518235-006 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-006 Surrogate %REC Limits Units (M)
Bromofluorobenzene 96 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v7
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 36 of 63
Field ID: WB07-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-007 Sampled: 10/15/24 12:06 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 10/16/24 16:22
518235-007 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 460 10 pptv 2.3 0.049 ug/m3
Chloromethane 480 100 pptv 0.99 0.21 ug/m3
Freon 114 17 10 pptv 0.12 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 22 10 pptv 0.085 0.039 ug/m3
Chloroethane 33 10 pptv 0.088 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 190 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 190 20 pptv 0.67 0.069 ug/m3
Freon 113 60 10 pptv 0.46 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 29 10 pptv 0.14 0.049 ug/m3
1,2-Dichloroethane 15 10 pptv 0.061 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 220 10 pptv 0.72 0.032 ug/m3
Carbon Tetrachloride 73 10 pptv 0.46 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 390 10 pptv 1.5 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 60 10 pptv 0.26 0.043 ug/m3
m,p-Xylenes 160 10 pptv 0.71 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 29 10 pptv 0.12 0.043 ug/m3
o-Xylene 65 10 pptv 0.28 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 13 10 pptv 0.065 0.049 ug/m3
1,2,4-Trimethylbenzene 58 10 pptv 0.29 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene 11 10 pptv 0.059 0.052 ug/m3
1 of 2 v8
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 37 of 63
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 230 10 pptv 0.99 0.043 ug/m3
518235-007 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-007 Surrogate %REC Limits Units (M)
Bromofluorobenzene 95 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v8
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 38 of 63
Field ID: WB08-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-008 Sampled: 10/15/24 12:11 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.100 Analyzed: 10/16/24 17:10
518235-008 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 470 11 pptv 2.3 0.054 ug/m3
Chloromethane 490 110 pptv 1.0 0.23 ug/m3
Freon 114 17 11 pptv 0.12 0.077 ug/m3
Vinyl Chloride ND 11 pptv ND 0.028 ug/m3
Bromomethane 21 11 pptv 0.080 0.043 ug/m3
Chloroethane 22 11 pptv 0.058 0.029 ug/m3
Vinyl bromide ND 11 pptv ND 0.048 ug/m3
Trichlorofluoromethane 200 11 pptv 1.1 0.062 ug/m3
1,1-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Methylene Chloride 210 22 pptv 0.74 0.076 ug/m3
Freon 113 61 11 pptv 0.47 0.084 ug/m3
trans-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
1,1-Dichloroethane ND 11 pptv ND 0.045 ug/m3
cis-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Chloroform 28 11 pptv 0.14 0.054 ug/m3
1,2-Dichloroethane 15 11 pptv 0.062 0.045 ug/m3
1,1,1-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Benzene 230 11 pptv 0.74 0.035 ug/m3
Carbon Tetrachloride 74 11 pptv 0.47 0.069 ug/m3
1,2-Dichloropropane ND 11 pptv ND 0.051 ug/m3
Bromodichloromethane ND 11 pptv ND 0.074 ug/m3
Trichloroethene ND 11 pptv ND 0.059 ug/m3
cis-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
trans-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
1,1,2-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Toluene 400 11 pptv 1.5 0.041 ug/m3
Dibromochloromethane ND 11 pptv ND 0.094 ug/m3
1,2-Dibromoethane ND 11 pptv ND 0.085 ug/m3
Tetrachloroethene ND 11 pptv ND 0.075 ug/m3
Chlorobenzene ND 11 pptv ND 0.051 ug/m3
Ethylbenzene 59 11 pptv 0.26 0.048 ug/m3
m,p-Xylenes 160 11 pptv 0.70 0.048 ug/m3
Bromoform ND 11 pptv ND 0.11 ug/m3
Styrene 23 11 pptv 0.099 0.047 ug/m3
o-Xylene 65 11 pptv 0.28 0.048 ug/m3
2-Chlorotoluene ND 11 pptv ND 0.057 ug/m3
1,3,5-Trimethylbenzene 12 11 pptv 0.061 0.054 ug/m3
1,2,4-Trimethylbenzene 54 11 pptv 0.27 0.054 ug/m3
Benzyl chloride ND 11 pptv ND 0.057 ug/m3
1,3-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,4-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,2-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,2,4-Trichlorobenzene ND 11 pptv ND 0.082 ug/m3
1,1,2,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
1,1,1,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
Naphthalene ND 11 pptv ND 0.058 ug/m3
1 of 2 v9
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 39 of 63
Hexachlorobutadiene ND 11 pptv ND 0.12 ug/m3
Xylene (total) 230 11 pptv 0.98 0.048 ug/m3
518235-008 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-008 Surrogate %REC Limits Units (M)
Bromofluorobenzene 96 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v9
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 40 of 63
Field ID: WB09-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-009 Sampled: 10/15/24 11:05 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 10/16/24 17:59
518235-009 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 470 10 pptv 2.3 0.049 ug/m3
Chloromethane 490 100 pptv 1.0 0.21 ug/m3
Freon 114 17 10 pptv 0.12 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 24 10 pptv 0.092 0.039 ug/m3
Chloroethane 16 10 pptv 0.042 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 200 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 820 20 pptv 2.8 0.069 ug/m3
Freon 113 61 10 pptv 0.47 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 37 10 pptv 0.18 0.049 ug/m3
1,2-Dichloroethane 16 10 pptv 0.063 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 250 10 pptv 0.81 0.032 ug/m3
Carbon Tetrachloride 74 10 pptv 0.47 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 420 10 pptv 1.6 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 62 10 pptv 0.27 0.043 ug/m3
m,p-Xylenes 180 10 pptv 0.79 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 29 10 pptv 0.12 0.043 ug/m3
o-Xylene 72 10 pptv 0.31 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 14 10 pptv 0.068 0.049 ug/m3
1,2,4-Trimethylbenzene 59 10 pptv 0.29 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene 15 10 pptv 0.078 0.052 ug/m3
1 of 2 v10.001
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 41 of 63
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 250 10 pptv 1.1 0.043 ug/m3
518235-009 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-009 Surrogate %REC Limits Units (M)
Bromofluorobenzene 96 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v10.001
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 42 of 63
Field ID: WB10-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-010 Sampled: 10/15/24 11:12 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 10/16/24 18:48
518235-010 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 460 10 pptv 2.3 0.049 ug/m3
Chloromethane 480 100 pptv 0.98 0.21 ug/m3
Freon 114 17 10 pptv 0.12 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 21 10 pptv 0.083 0.039 ug/m3
Chloroethane ND 10 pptv ND 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 190 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 250 20 pptv 0.85 0.069 ug/m3
Freon 113 60 10 pptv 0.46 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 31 10 pptv 0.15 0.049 ug/m3
1,2-Dichloroethane 18 10 pptv 0.072 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 310 10 pptv 0.99 0.032 ug/m3
Carbon Tetrachloride 73 10 pptv 0.46 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 350 10 pptv 1.3 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 100 10 pptv 0.45 0.043 ug/m3
m,p-Xylenes 270 10 pptv 1.2 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 32 10 pptv 0.13 0.043 ug/m3
o-Xylene 84 10 pptv 0.37 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 28 10 pptv 0.14 0.049 ug/m3
1,2,4-Trimethylbenzene 100 10 pptv 0.50 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene 26 10 pptv 0.14 0.052 ug/m3
1 of 2 v11
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 43 of 63
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 350 10 pptv 1.5 0.043 ug/m3
518235-010 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-010 Surrogate %REC Limits Units (M)
Bromofluorobenzene 94 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v11
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 44 of 63
Field ID: WB11-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-011 Sampled: 10/15/24 11:16 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 10/16/24 19:37
518235-011 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 470 10 pptv 2.3 0.049 ug/m3
Chloromethane 490 100 pptv 1.0 0.21 ug/m3
Freon 114 17 10 pptv 0.12 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 23 10 pptv 0.089 0.039 ug/m3
Chloroethane 34 10 pptv 0.089 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 190 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 160 20 pptv 0.57 0.069 ug/m3
Freon 113 61 10 pptv 0.47 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 29 10 pptv 0.14 0.049 ug/m3
1,2-Dichloroethane 15 10 pptv 0.061 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 240 10 pptv 0.78 0.032 ug/m3
Carbon Tetrachloride 74 10 pptv 0.47 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 440 10 pptv 1.6 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 61 10 pptv 0.27 0.043 ug/m3
m,p-Xylenes 180 10 pptv 0.78 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 31 10 pptv 0.13 0.043 ug/m3
o-Xylene 70 10 pptv 0.31 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 15 10 pptv 0.073 0.049 ug/m3
1,2,4-Trimethylbenzene 60 10 pptv 0.30 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene 16 10 pptv 0.086 0.052 ug/m3
1 of 2 v12
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 45 of 63
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 250 10 pptv 1.1 0.043 ug/m3
518235-011 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-011 Surrogate %REC Limits Units (M)
Bromofluorobenzene 97 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v12
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 46 of 63
Field ID: WB12-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-012 Sampled: 10/15/24 11:20 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 10/16/24 20:25
518235-012 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 460 10 pptv 2.3 0.049 ug/m3
Chloromethane 490 100 pptv 1.0 0.21 ug/m3
Freon 114 17 10 pptv 0.12 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 21 10 pptv 0.081 0.039 ug/m3
Chloroethane 39 10 pptv 0.10 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 190 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 160 20 pptv 0.57 0.069 ug/m3
Freon 113 61 10 pptv 0.46 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 29 10 pptv 0.14 0.049 ug/m3
1,2-Dichloroethane 15 10 pptv 0.062 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 270 10 pptv 0.85 0.032 ug/m3
Carbon Tetrachloride 73 10 pptv 0.46 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 490 10 pptv 1.9 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 68 10 pptv 0.29 0.043 ug/m3
m,p-Xylenes 190 10 pptv 0.83 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 32 10 pptv 0.14 0.043 ug/m3
o-Xylene 75 10 pptv 0.33 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 15 10 pptv 0.074 0.049 ug/m3
1,2,4-Trimethylbenzene 64 10 pptv 0.32 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene 11 10 pptv 0.059 0.052 ug/m3
1 of 2 v13
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 47 of 63
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 270 10 pptv 1.2 0.043 ug/m3
518235-012 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-012 Surrogate %REC Limits Units (M)
Bromofluorobenzene 97 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v13
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 48 of 63
Field ID: WB13-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-013 Sampled: 10/15/24 11:24 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.100 Analyzed: 10/16/24 21:14
518235-013 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 460 11 pptv 2.3 0.054 ug/m3
Chloromethane 490 110 pptv 1.0 0.23 ug/m3
Freon 114 16 11 pptv 0.11 0.077 ug/m3
Vinyl Chloride ND 11 pptv ND 0.028 ug/m3
Bromomethane 21 11 pptv 0.083 0.043 ug/m3
Chloroethane ND 11 pptv ND 0.029 ug/m3
Vinyl bromide ND 11 pptv ND 0.048 ug/m3
Trichlorofluoromethane 190 11 pptv 1.1 0.062 ug/m3
1,1-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Methylene Chloride 170 22 pptv 0.60 0.076 ug/m3
Freon 113 59 11 pptv 0.46 0.084 ug/m3
trans-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
1,1-Dichloroethane ND 11 pptv ND 0.045 ug/m3
cis-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Chloroform 35 11 pptv 0.17 0.054 ug/m3
1,2-Dichloroethane 16 11 pptv 0.065 0.045 ug/m3
1,1,1-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Benzene 280 11 pptv 0.89 0.035 ug/m3
Carbon Tetrachloride 72 11 pptv 0.46 0.069 ug/m3
1,2-Dichloropropane ND 11 pptv ND 0.051 ug/m3
Bromodichloromethane ND 11 pptv ND 0.074 ug/m3
Trichloroethene ND 11 pptv ND 0.059 ug/m3
cis-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
trans-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
1,1,2-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Toluene 530 11 pptv 2.0 0.041 ug/m3
Dibromochloromethane ND 11 pptv ND 0.094 ug/m3
1,2-Dibromoethane ND 11 pptv ND 0.085 ug/m3
Tetrachloroethene 12 11 pptv 0.080 0.075 ug/m3
Chlorobenzene ND 11 pptv ND 0.051 ug/m3
Ethylbenzene 72 11 pptv 0.31 0.048 ug/m3
m,p-Xylenes 220 11 pptv 0.94 0.048 ug/m3
Bromoform ND 11 pptv ND 0.11 ug/m3
Styrene 76 11 pptv 0.32 0.047 ug/m3
o-Xylene 86 11 pptv 0.37 0.048 ug/m3
2-Chlorotoluene ND 11 pptv ND 0.057 ug/m3
1,3,5-Trimethylbenzene 17 11 pptv 0.085 0.054 ug/m3
1,2,4-Trimethylbenzene 72 11 pptv 0.35 0.054 ug/m3
Benzyl chloride ND 11 pptv ND 0.057 ug/m3
1,3-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,4-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,2-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,2,4-Trichlorobenzene ND 11 pptv ND 0.082 ug/m3
1,1,2,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
1,1,1,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
Naphthalene 23 11 pptv 0.12 0.058 ug/m3
1 of 2 v14
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 49 of 63
Hexachlorobutadiene ND 11 pptv ND 0.12 ug/m3
Xylene (total) 300 11 pptv 1.3 0.048 ug/m3
518235-013 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-013 Surrogate %REC Limits Units (M)
Bromofluorobenzene 97 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v14
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 50 of 63
Field ID: WB14-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-014 Sampled: 10/15/24 11:28 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 10/16/24 22:03
518235-014 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 460 10 pptv 2.3 0.049 ug/m3
Chloromethane 490 100 pptv 1.0 0.21 ug/m3
Freon 114 16 10 pptv 0.11 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 22 10 pptv 0.085 0.039 ug/m3
Chloroethane ND 10 pptv ND 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 190 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 170 20 pptv 0.59 0.069 ug/m3
Freon 113 60 10 pptv 0.46 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 27 10 pptv 0.13 0.049 ug/m3
1,2-Dichloroethane 16 10 pptv 0.063 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 240 10 pptv 0.78 0.032 ug/m3
Carbon Tetrachloride 73 10 pptv 0.46 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 350 10 pptv 1.3 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 60 10 pptv 0.26 0.043 ug/m3
m,p-Xylenes 170 10 pptv 0.75 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 20 10 pptv 0.086 0.043 ug/m3
o-Xylene 68 10 pptv 0.30 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 14 10 pptv 0.067 0.049 ug/m3
1,2,4-Trimethylbenzene 55 10 pptv 0.27 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene 11 10 pptv 0.057 0.052 ug/m3
1 of 2 v15
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 51 of 63
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 240 10 pptv 1.1 0.043 ug/m3
518235-014 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-014 Surrogate %REC Limits Units (M)
Bromofluorobenzene 97 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v15
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 52 of 63
Field ID: WB17-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-015 Sampled: 10/15/24 09:40 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.100 Analyzed: 10/16/24 22:52
518235-015 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 460 11 pptv 2.3 0.054 ug/m3
Chloromethane 480 110 pptv 1.0 0.23 ug/m3
Freon 114 16 11 pptv 0.11 0.077 ug/m3
Vinyl Chloride ND 11 pptv ND 0.028 ug/m3
Bromomethane 22 11 pptv 0.084 0.043 ug/m3
Chloroethane 12 11 pptv 0.032 0.029 ug/m3
Vinyl bromide ND 11 pptv ND 0.048 ug/m3
Trichlorofluoromethane 190 11 pptv 1.1 0.062 ug/m3
1,1-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Methylene Chloride 150 22 pptv 0.53 0.076 ug/m3
Freon 113 60 11 pptv 0.46 0.084 ug/m3
trans-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
1,1-Dichloroethane ND 11 pptv ND 0.045 ug/m3
cis-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Chloroform 29 11 pptv 0.14 0.054 ug/m3
1,2-Dichloroethane 15 11 pptv 0.062 0.045 ug/m3
1,1,1-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Benzene 260 11 pptv 0.82 0.035 ug/m3
Carbon Tetrachloride 72 11 pptv 0.46 0.069 ug/m3
1,2-Dichloropropane ND 11 pptv ND 0.051 ug/m3
Bromodichloromethane ND 11 pptv ND 0.074 ug/m3
Trichloroethene ND 11 pptv ND 0.059 ug/m3
cis-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
trans-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
1,1,2-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Toluene 450 11 pptv 1.7 0.041 ug/m3
Dibromochloromethane ND 11 pptv ND 0.094 ug/m3
1,2-Dibromoethane ND 11 pptv ND 0.085 ug/m3
Tetrachloroethene ND 11 pptv ND 0.075 ug/m3
Chlorobenzene ND 11 pptv ND 0.051 ug/m3
Ethylbenzene 69 11 pptv 0.30 0.048 ug/m3
m,p-Xylenes 200 11 pptv 0.89 0.048 ug/m3
Bromoform ND 11 pptv ND 0.11 ug/m3
Styrene 30 11 pptv 0.13 0.047 ug/m3
o-Xylene 81 11 pptv 0.35 0.048 ug/m3
2-Chlorotoluene ND 11 pptv ND 0.057 ug/m3
1,3,5-Trimethylbenzene 17 11 pptv 0.085 0.054 ug/m3
1,2,4-Trimethylbenzene 67 11 pptv 0.33 0.054 ug/m3
Benzyl chloride ND 11 pptv ND 0.057 ug/m3
1,3-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,4-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,2-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,2,4-Trichlorobenzene ND 11 pptv ND 0.082 ug/m3
1,1,2,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
1,1,1,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
Naphthalene 14 11 pptv 0.072 0.058 ug/m3
1 of 2 v16
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 53 of 63
Hexachlorobutadiene ND 11 pptv ND 0.12 ug/m3
Xylene (total) 290 11 pptv 1.2 0.048 ug/m3
518235-015 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-015 Surrogate %REC Limits Units (M)
Bromofluorobenzene 97 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v16
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 54 of 63
Field ID: WB18-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-016 Sampled: 10/15/24 10:28 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.200 Analyzed: 10/16/24 23:40
518235-016 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 480 12 pptv 2.4 0.059 ug/m3
Chloromethane 510 120 pptv 1.1 0.25 ug/m3
Freon 114 17 12 pptv 0.12 0.084 ug/m3
Vinyl Chloride ND 12 pptv ND 0.031 ug/m3
Bromomethane 28 12 pptv 0.11 0.047 ug/m3
Chloroethane 13 12 pptv 0.035 0.032 ug/m3
Vinyl bromide ND 12 pptv ND 0.052 ug/m3
Trichlorofluoromethane 200 12 pptv 1.1 0.067 ug/m3
1,1-Dichloroethene ND 12 pptv ND 0.048 ug/m3
Methylene Chloride 160 24 pptv 0.56 0.083 ug/m3
Freon 113 62 12 pptv 0.47 0.092 ug/m3
trans-1,2-Dichloroethene ND 12 pptv ND 0.048 ug/m3
1,1-Dichloroethane ND 12 pptv ND 0.049 ug/m3
cis-1,2-Dichloroethene ND 12 pptv ND 0.048 ug/m3
Chloroform 29 12 pptv 0.14 0.059 ug/m3
1,2-Dichloroethane 15 12 pptv 0.062 0.049 ug/m3
1,1,1-Trichloroethane ND 12 pptv ND 0.065 ug/m3
Benzene 250 12 pptv 0.79 0.038 ug/m3
Carbon Tetrachloride 75 12 pptv 0.47 0.075 ug/m3
1,2-Dichloropropane ND 12 pptv ND 0.055 ug/m3
Bromodichloromethane ND 12 pptv ND 0.080 ug/m3
Trichloroethene ND 12 pptv ND 0.064 ug/m3
cis-1,3-Dichloropropene ND 12 pptv ND 0.054 ug/m3
trans-1,3-Dichloropropene ND 12 pptv ND 0.054 ug/m3
1,1,2-Trichloroethane ND 12 pptv ND 0.065 ug/m3
Toluene 440 12 pptv 1.7 0.045 ug/m3
Dibromochloromethane ND 12 pptv ND 0.10 ug/m3
1,2-Dibromoethane ND 12 pptv ND 0.092 ug/m3
Tetrachloroethene ND 12 pptv ND 0.081 ug/m3
Chlorobenzene ND 12 pptv ND 0.055 ug/m3
Ethylbenzene 68 12 pptv 0.30 0.052 ug/m3
m,p-Xylenes 200 12 pptv 0.88 0.052 ug/m3
Bromoform ND 12 pptv ND 0.12 ug/m3
Styrene 31 12 pptv 0.13 0.051 ug/m3
o-Xylene 81 12 pptv 0.35 0.052 ug/m3
2-Chlorotoluene ND 12 pptv ND 0.062 ug/m3
1,3,5-Trimethylbenzene 22 12 pptv 0.11 0.059 ug/m3
1,2,4-Trimethylbenzene 89 12 pptv 0.44 0.059 ug/m3
Benzyl chloride ND 12 pptv ND 0.062 ug/m3
1,3-Dichlorobenzene ND 12 pptv ND 0.072 ug/m3
1,4-Dichlorobenzene ND 12 pptv ND 0.072 ug/m3
1,2-Dichlorobenzene ND 12 pptv ND 0.072 ug/m3
1,2,4-Trichlorobenzene ND 12 pptv ND 0.089 ug/m3
1,1,2,2-Tetrachloroethane ND 12 pptv ND 0.082 ug/m3
1,1,1,2-Tetrachloroethane ND 12 pptv ND 0.082 ug/m3
Naphthalene 14 12 pptv 0.073 0.063 ug/m3
1 of 2 v17
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 55 of 63
Hexachlorobutadiene ND 12 pptv ND 0.13 ug/m3
Xylene (total) 280 12 pptv 1.2 0.052 ug/m3
518235-016 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-016 Surrogate %REC Limits Units (M)
Bromofluorobenzene 95 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v17
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 56 of 63
Field ID: WB19-14D Batch#: 352933 Prep: METHOD
Lab ID: 518235-017 Sampled: 10/15/24 14:44 Analysis: EPA TO-15 SIM Matrix: Air Received: 10/15/24 Analyst: OHD
Diln Fac: 1.100 Analyzed: 10/17/24 00:29
518235-017 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 460 11 pptv 2.3 0.054 ug/m3
Chloromethane 500 110 pptv 1.0 0.23 ug/m3
Freon 114 16 11 pptv 0.11 0.077 ug/m3
Vinyl Chloride ND 11 pptv ND 0.028 ug/m3
Bromomethane 21 11 pptv 0.080 0.043 ug/m3
Chloroethane 26 11 pptv 0.069 0.029 ug/m3
Vinyl bromide ND 11 pptv ND 0.048 ug/m3
Trichlorofluoromethane 190 11 pptv 1.1 0.062 ug/m3
1,1-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Methylene Chloride 140 22 pptv 0.50 0.076 ug/m3
Freon 113 59 11 pptv 0.45 0.084 ug/m3
trans-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
1,1-Dichloroethane ND 11 pptv ND 0.045 ug/m3
cis-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Chloroform 27 11 pptv 0.13 0.054 ug/m3
1,2-Dichloroethane 17 11 pptv 0.067 0.045 ug/m3
1,1,1-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Benzene 320 11 pptv 1.0 0.035 ug/m3
Carbon Tetrachloride 71 11 pptv 0.45 0.069 ug/m3
1,2-Dichloropropane ND 11 pptv ND 0.051 ug/m3
Bromodichloromethane ND 11 pptv ND 0.074 ug/m3
Trichloroethene ND 11 pptv ND 0.059 ug/m3
cis-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
trans-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
1,1,2-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Toluene 480 11 pptv 1.8 0.041 ug/m3
Dibromochloromethane ND 11 pptv ND 0.094 ug/m3
1,2-Dibromoethane ND 11 pptv ND 0.085 ug/m3
Tetrachloroethene ND 11 pptv ND 0.075 ug/m3
Chlorobenzene ND 11 pptv ND 0.051 ug/m3
Ethylbenzene 72 11 pptv 0.31 0.048 ug/m3
m,p-Xylenes 220 11 pptv 0.95 0.048 ug/m3
Bromoform ND 11 pptv ND 0.11 ug/m3
Styrene 42 11 pptv 0.18 0.047 ug/m3
o-Xylene 86 11 pptv 0.37 0.048 ug/m3
2-Chlorotoluene ND 11 pptv ND 0.057 ug/m3
1,3,5-Trimethylbenzene 17 11 pptv 0.081 0.054 ug/m3
1,2,4-Trimethylbenzene 62 11 pptv 0.30 0.054 ug/m3
Benzyl chloride ND 11 pptv ND 0.057 ug/m3
1,3-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,4-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,2-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,2,4-Trichlorobenzene ND 11 pptv ND 0.082 ug/m3
1,1,2,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
1,1,1,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
Naphthalene ND 11 pptv ND 0.058 ug/m3
1 of 2 v18
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 57 of 63
Hexachlorobutadiene ND 11 pptv ND 0.12 ug/m3
Xylene (total) 300 11 pptv 1.3 0.048 ug/m3
518235-017 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 518235-017 Surrogate %REC Limits Units (M)
Bromofluorobenzene 98 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v18
Enthalpy Analytical - Orange Analytical Report
Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 58 of 63
Type: BS Diln Fac: 1.000 Prep: METHOD
Lab ID: QC1195606 Batch#: 352933 Analysis: EPA TO-15 SIM Matrix: Air Analyzed: 10/16/24 06:49 Analyst: OHD
QC1195606 Analyte Spiked Result (V) Units (V) %REC Limits Freon 12 200.0 213.0 pptv 107 70-130
Chloromethane 200.0 214.0 pptv 107 70-130
Freon 114 200.0 220.1 pptv 110 70-130
Vinyl Chloride 200.0 206.4 pptv 103 70-130
Bromomethane 200.0 215.4 pptv 108 70-130
Chloroethane 200.0 195.5 pptv 98 70-130
Vinyl bromide 200.0 200.5 pptv 100 70-130
Trichlorofluoromethane 200.0 207.1 pptv 104 70-130
1,1-Dichloroethene 200.0 196.8 pptv 98 70-130
Methylene Chloride 200.0 186.6 pptv 93 70-130
Freon 113 200.0 203.2 pptv 102 70-130
trans-1,2-Dichloroethene 200.0 194.4 pptv 97 70-130
1,1-Dichloroethane 200.0 197.8 pptv 99 70-130
cis-1,2-Dichloroethene 200.0 192.0 pptv 96 70-130
Chloroform 200.0 201.8 pptv 101 70-130
1,2-Dichloroethane 200.0 200.7 pptv 100 70-130
1,1,1-Trichloroethane 200.0 205.5 pptv 103 70-130
Benzene 200.0 186.9 pptv 93 70-130
Carbon Tetrachloride 200.0 206.8 pptv 103 70-130
1,2-Dichloropropane 200.0 201.5 pptv 101 70-130
Bromodichloromethane 200.0 210.8 pptv 105 70-130
Trichloroethene 200.0 204.0 pptv 102 70-130
cis-1,3-Dichloropropene 200.0 202.8 pptv 101 70-130
trans-1,3-Dichloropropene 200.0 203.6 pptv 102 70-130
1,1,2-Trichloroethane 200.0 205.8 pptv 103 70-130
Toluene 200.0 184.5 pptv 92 70-130
Dibromochloromethane 200.0 214.0 pptv 107 70-130
1,2-Dibromoethane 200.0 203.3 pptv 102 70-130
Tetrachloroethene 200.0 204.4 pptv 102 70-130
Chlorobenzene 200.0 194.5 pptv 97 70-130
Ethylbenzene 200.0 181.9 pptv 91 70-130
m,p-Xylenes 400.0 378.4 pptv 95 70-130
Bromoform 200.0 214.1 pptv 107 70-130
Styrene 200.0 183.5 pptv 92 70-130
o-Xylene 200.0 194.7 pptv 97 70-130
2-Chlorotoluene 200.0 191.6 pptv 96 70-130
1,3,5-Trimethylbenzene 200.0 198.7 pptv 99 70-130
1,2,4-Trimethylbenzene 200.0 189.8 pptv 95 70-130
Benzyl chloride 200.0 209.0 pptv 105 70-130
1,3-Dichlorobenzene 200.0 199.1 pptv 100 70-130
1,4-Dichlorobenzene 200.0 201.7 pptv 101 70-130
1,2-Dichlorobenzene 200.0 195.0 pptv 97 70-130
1,2,4-Trichlorobenzene 200.0 165.9 pptv 83 70-130
1,1,2,2-Tetrachloroethane 200.0 200.9 pptv 100 70-130
1,1,1,2-Tetrachloroethane 200.0 206.6 pptv 103 70-130
Naphthalene 200.0 142.3 pptv 71 70-130
Hexachlorobutadiene 200.0 178.8 pptv 89 70-130
1 of 3 v19
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 59 of 63
QC1195606 Surrogate %REC Limits
Bromofluorobenzene 103 70-130
Type: BSD Diln Fac: 1.000 Prep: METHOD
Lab ID: QC1195607 Batch#: 352933 Analysis: EPA TO-15 SIM Matrix: Air Analyzed: 10/16/24 07:31 Analyst: OHD
QC1195607 Analyte Spiked Result (V) Units (V) %REC Limits RPD Lim Freon 12 200.0 216.9 pptv 108 70-130 2 25
Chloromethane 200.0 217.1 pptv 109 70-130 1 25
Freon 114 200.0 223.8 pptv 112 70-130 2 25
Vinyl Chloride 200.0 211.3 pptv 106 70-130 2 25
Bromomethane 200.0 220.7 pptv 110 70-130 2 25
Chloroethane 200.0 198.9 pptv 99 70-130 2 25
Vinyl bromide 200.0 203.9 pptv 102 70-130 2 25
Trichlorofluoromethane 200.0 210.7 pptv 105 70-130 2 25 1,1-Dichloroethene 200.0 201.1 pptv 101 70-130 2 25
Methylene Chloride 200.0 190.5 pptv 95 70-130 2 25
Freon 113 200.0 206.7 pptv 103 70-130 2 25
trans-1,2-Dichloroethene 200.0 198.7 pptv 99 70-130 2 25 1,1-Dichloroethane 200.0 202.3 pptv 101 70-130 2 25
cis-1,2-Dichloroethene 200.0 197.2 pptv 99 70-130 3 25
Chloroform 200.0 205.2 pptv 103 70-130 2 25
1,2-Dichloroethane 200.0 204.8 pptv 102 70-130 2 25
1,1,1-Trichloroethane 200.0 209.6 pptv 105 70-130 2 25
Benzene 200.0 191.1 pptv 96 70-130 2 25
Carbon Tetrachloride 200.0 210.1 pptv 105 70-130 2 25
1,2-Dichloropropane 200.0 204.7 pptv 102 70-130 2 25
Bromodichloromethane 200.0 213.0 pptv 107 70-130 1 25
Trichloroethene 200.0 206.1 pptv 103 70-130 1 25
cis-1,3-Dichloropropene 200.0 206.5 pptv 103 70-130 2 25 trans-1,3-Dichloropropene 200.0 207.0 pptv 104 70-130 2 25 1,1,2-Trichloroethane 200.0 207.9 pptv 104 70-130 1 25
Toluene 200.0 189.0 pptv 95 70-130 2 25
Dibromochloromethane 200.0 216.8 pptv 108 70-130 1 25
1,2-Dibromoethane 200.0 207.1 pptv 104 70-130 2 25
Tetrachloroethene 200.0 207.5 pptv 104 70-130 1 25
Chlorobenzene 200.0 197.3 pptv 99 70-130 1 25
Ethylbenzene 200.0 185.5 pptv 93 70-130 2 25
m,p-Xylenes 400.0 385.7 pptv 96 70-130 2 25
Bromoform 200.0 215.7 pptv 108 70-130 1 25
Styrene 200.0 187.6 pptv 94 70-130 2 25
o-Xylene 200.0 199.2 pptv 100 70-130 2 25
2-Chlorotoluene 200.0 196.0 pptv 98 70-130 2 25
1,3,5-Trimethylbenzene 200.0 203.2 pptv 102 70-130 2 25 1,2,4-Trimethylbenzene 200.0 195.7 pptv 98 70-130 3 25
Benzyl chloride 200.0 215.5 pptv 108 70-130 3 25
1,3-Dichlorobenzene 200.0 206.9 pptv 103 70-130 4 25
1,4-Dichlorobenzene 200.0 201.0 pptv 100 70-130 0 25
1,2-Dichlorobenzene 200.0 199.2 pptv 100 70-130 2 25
1,2,4-Trichlorobenzene 200.0 171.2 pptv 86 70-130 3 25
1,1,2,2-Tetrachloroethane 200.0 203.5 pptv 102 70-130 1 25 1,1,1,2-Tetrachloroethane 200.0 207.9 pptv 104 70-130 1 25 2 of 3 v19
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 60 of 63
Naphthalene 200.0 149.1 pptv 75 70-130 5 25
Hexachlorobutadiene 200.0 182.7 pptv 91 70-130 2 25
QC1195607 Analyte Spiked Result (V) Units (V) %REC Limits RPD Lim QC1195607 Surrogate %REC Limits
Bromofluorobenzene 102 70-130
Legend
RPD:

Relative Percent
Difference
Result
(V):

Result in volume units
3 of 3 v19
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 61 of 63
Type: BLANK Diln Fac: 1.000 Prep: METHOD
Lab ID: QC1195608 Batch#: 352933 Analysis: EPA TO-15 SIM Matrix: Air Analyzed: 10/16/24 08:59 Analyst: OHD
QC1195608 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 ND 10 pptv ND 0.049 ug/m3
Chloromethane ND 100 pptv ND 0.21 ug/m3
Freon 114 ND 10 pptv ND 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane ND 10 pptv ND 0.039 ug/m3
Chloroethane ND 10 pptv ND 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane ND 10 pptv ND 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride ND 20 pptv ND 0.069 ug/m3
Freon 113 ND 10 pptv ND 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform ND 10 pptv ND 0.049 ug/m3
1,2-Dichloroethane ND 10 pptv ND 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene ND 10 pptv ND 0.032 ug/m3
Carbon Tetrachloride ND 10 pptv ND 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene ND 10 pptv ND 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene ND 10 pptv ND 0.043 ug/m3
m,p-Xylenes ND 10 pptv ND 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene ND 10 pptv ND 0.043 ug/m3
o-Xylene ND 10 pptv ND 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene ND 10 pptv ND 0.049 ug/m3
1,2,4-Trimethylbenzene ND 10 pptv ND 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene ND 10 pptv ND 0.052 ug/m3
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) ND 10 pptv ND 0.043 ug/m3
1 of 2 v20
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 62 of 63
QC1195608 Surrogate %REC Limits Units (M)
Bromofluorobenzene 90 70-130 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v20
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 518235 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 63 of 63
Enthalpy Analytical
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Lab Job Number : 522442
Report Level : II
Report Date : 12/23/2024
Analytical Report prepared for:

Yola Bayram
Catalyst Environmental Solutions
315 Montana Avenue
Suite 311
Santa Monica, CA 90403
Location: Walnut Bluff Workplan
Miguel Gamboa, Project Manager
[email protected]
This data package has been reviewed for technical correctness and completeness. Release of this data has been authorized by the Laboratory Manager or the Manager's designee, as verified by the above signature which applies to this PDF file as well as any associated electronic data deliverable files. The results contained in this report meet all requirements of NELAP and pertain only to those samples which were submitted for analysis. This report may be reproduced only in its entirety.

CA ELAP# 1338, NELAP# 4038, SCAQMD LAP# 18LA0518, LACSD ID# 10105, ORELAP# 4197
Authorized for release by:
1 of 30
Sample Summary
Yola Bayram
Catalyst Environmental
Solutions
315 Montana Avenue
Suite 311
Santa Monica, CA 90403
Lab Job #: 522442
Location: Walnut Bluff Workplan
Date Received: 12/16/24
Sample ID Lab ID Collected Matrix
WB02-14D-R2 522442-001 12/16/24 14:03 Air
WB03-14D-R2 522442-002 12/16/24 14:10 Air
WB05-14D-R2 522442-003 12/16/24 14:15 Air
WB10-14D-R2 522442-004 12/16/24 14:24 Air
2 of 30
Case Narrative
Catalyst Environmental Solutions
315 Montana Avenue
Suite 311
Santa Monica, CA 90403
Yola Bayram
Lab Job Number: 522442
Location: Walnut Bluff Workplan
Date Received: 12/16/24
This data package contains sample and QC results for four air samples, requested for the above referenced project on 12/16/24. The samples were received intact.

Volatile Organics in Air by MS (EPA TO-15 SIM):

No analytical problems were encountered.
1 of 1
3 of 30
Yola Bayram
Catalyst Environmental Solutions
315 Montana Avenue
Suite 311
Santa Monica, CA 90403
Lab Job #: 522442
Location: Walnut Bluff Workplan
Date Received: 12/16/24
Sample ID: WB02-14D-R2 Lab ID: 522442-001 Collected: 12/16/24 14:03 Matrix: Air
522442-001 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 440 pptv 10
Freon 12 2.2 ug/m3 0.049
Chloromethane 540 pptv 100
Chloromethane 1.1 ug/m3 0.21
Freon 114 15 pptv 10
Freon 114 0.10 ug/m3 0.070
Bromomethane 38 pptv 10
Bromomethane 0.15 ug/m3 0.039
Trichlorofluoromethane 190 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 240 pptv 20
Methylene Chloride 0.84 ug/m3 0.069
Freon 113 60 pptv 10
Freon 113 0.46 ug/m3 0.077
Chloroform 39 pptv 10
Chloroform 0.19 ug/m3 0.049
1,2-Dichloroethane 26 pptv 10
1,2-Dichloroethane 0.10 ug/m3 0.040
Benzene 600 pptv 10
Benzene 1.9 ug/m3 0.032
Carbon Tetrachloride 70 pptv 10
Carbon Tetrachloride 0.44 ug/m3 0.063
Toluene 870 pptv 10
Toluene 3.3 ug/m3 0.038
Tetrachloroethene 15 pptv 10
Tetrachloroethene 0.10 ug/m3 0.068
Ethylbenzene 200 pptv 10
Ethylbenzene 0.88 ug/m3 0.043
m,p-Xylenes 580 pptv 10
m,p-Xylenes 2.5 ug/m3 0.043
Styrene 96 pptv 10
Styrene 0.41 ug/m3 0.043
o-Xylene 220 pptv 10
o-Xylene 0.95 ug/m3 0.043
1,3,5-Trimethylbenzene 68 pptv 10
1,3,5-Trimethylbenzene 0.34 ug/m3 0.049
1,2,4-Trimethylbenzene 240 pptv 10
1,2,4-Trimethylbenzene 1.2 ug/m3 0.049
1,4-Dichlorobenzene 14 pptv 10
1,4-Dichlorobenzene 0.082 ug/m3 0.060
1 of 7 v12.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 4 of 30 Naphthalene 30 pptv 10
Naphthalene 0.15 ug/m3 0.052
Xylene (total) 800 pptv 10
Xylene (total) 3.5 ug/m3 0.043
522442-001 Analyte Result Qual Units RL
2 of 7 v12.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 5 of 30 Sample ID: WB03-14D-R2 Lab ID: 522442-002 Collected: 12/16/24 14:10 Matrix: Air
522442-002 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 440 pptv 10
Freon 12 2.2 ug/m3 0.049
Chloromethane 550 pptv 100
Chloromethane 1.1 ug/m3 0.21
Freon 114 15 pptv 10
Freon 114 0.10 ug/m3 0.070
Bromomethane 40 pptv 10
Bromomethane 0.16 ug/m3 0.039
Trichlorofluoromethane 190 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 270 pptv 20
Methylene Chloride 0.93 ug/m3 0.069
Freon 113 61 pptv 10
Freon 113 0.47 ug/m3 0.077
Chloroform 40 pptv 10
Chloroform 0.20 ug/m3 0.049
1,2-Dichloroethane 24 pptv 10
1,2-Dichloroethane 0.097 ug/m3 0.040
Benzene 540 pptv 10
Benzene 1.7 ug/m3 0.032
Carbon Tetrachloride 72 pptv 10
Carbon Tetrachloride 0.45 ug/m3 0.063
Toluene 860 pptv 10
Toluene 3.2 ug/m3 0.038
Tetrachloroethene 16 pptv 10
Tetrachloroethene 0.11 ug/m3 0.068
Ethylbenzene 170 pptv 10
Ethylbenzene 0.73 ug/m3 0.043
m,p-Xylenes 540 pptv 10
m,p-Xylenes 2.3 ug/m3 0.043
Styrene 110 pptv 10
Styrene 0.46 ug/m3 0.043
o-Xylene 200 pptv 10
o-Xylene 0.89 ug/m3 0.043
1,3,5-Trimethylbenzene 54 pptv 10
1,3,5-Trimethylbenzene 0.26 ug/m3 0.049
1,2,4-Trimethylbenzene 190 pptv 10
1,2,4-Trimethylbenzene 0.92 ug/m3 0.049
1,4-Dichlorobenzene 15 pptv 10
1,4-Dichlorobenzene 0.092 ug/m3 0.060
Naphthalene 21 pptv 10
Naphthalene 0.11 ug/m3 0.052
Xylene (total) 740 pptv 10
Xylene (total) 3.2 ug/m3 0.043
3 of 7 v12.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 6 of 30 4 of 7 v12.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 7 of 30 Sample ID: WB05-14D-R2 Lab ID: 522442-003 Collected: 12/16/24 14:15 Matrix: Air
522442-003 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 440 pptv 11
Freon 12 2.2 ug/m3 0.054
Chloromethane 540 pptv 110
Chloromethane 1.1 ug/m3 0.23
Freon 114 15 pptv 11
Freon 114 0.10 ug/m3 0.077
Bromomethane 39 pptv 11
Bromomethane 0.15 ug/m3 0.043
Trichlorofluoromethane 190 pptv 11
Trichlorofluoromethane 1.1 ug/m3 0.062
Methylene Chloride 260 pptv 22
Methylene Chloride 0.91 ug/m3 0.076
Freon 113 61 pptv 11
Freon 113 0.47 ug/m3 0.084
Chloroform 39 pptv 11
Chloroform 0.19 ug/m3 0.054
1,2-Dichloroethane 24 pptv 11
1,2-Dichloroethane 0.096 ug/m3 0.045
Benzene 550 pptv 11
Benzene 1.7 ug/m3 0.035
Carbon Tetrachloride 71 pptv 11
Carbon Tetrachloride 0.45 ug/m3 0.069
Toluene 890 pptv 11
Toluene 3.4 ug/m3 0.041
Tetrachloroethene 17 pptv 11
Tetrachloroethene 0.12 ug/m3 0.075
Ethylbenzene 170 pptv 11
Ethylbenzene 0.72 ug/m3 0.048
m,p-Xylenes 520 pptv 11
m,p-Xylenes 2.3 ug/m3 0.048
Styrene 110 pptv 11
Styrene 0.47 ug/m3 0.047
o-Xylene 200 pptv 11
o-Xylene 0.87 ug/m3 0.048
1,3,5-Trimethylbenzene 68 pptv 11
1,3,5-Trimethylbenzene 0.33 ug/m3 0.054
1,2,4-Trimethylbenzene 260 pptv 11
1,2,4-Trimethylbenzene 1.3 ug/m3 0.054
1,4-Dichlorobenzene 15 pptv 11
1,4-Dichlorobenzene 0.090 ug/m3 0.066
Naphthalene 31 pptv 11
Naphthalene 0.16 ug/m3 0.058
Xylene (total) 720 pptv 11
Xylene (total) 3.1 ug/m3 0.048
5 of 7 v12.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 8 of 30 6 of 7 v12.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 9 of 30 Sample ID: WB10-14D-R2 Lab ID: 522442-004 Collected: 12/16/24 14:24 Matrix: Air
522442-004 Analyte Result Qual Units RL
Method: EPA TO-15 SIM
Prep Method: METHOD
Freon 12 440 pptv 10
Freon 12 2.2 ug/m3 0.049
Chloromethane 550 pptv 100
Chloromethane 1.1 ug/m3 0.21
Freon 114 15 pptv 10
Freon 114 0.10 ug/m3 0.070
Bromomethane 37 pptv 10
Bromomethane 0.15 ug/m3 0.039
Trichlorofluoromethane 190 pptv 10
Trichlorofluoromethane 1.1 ug/m3 0.056
Methylene Chloride 250 pptv 20
Methylene Chloride 0.87 ug/m3 0.069
Freon 113 60 pptv 10
Freon 113 0.46 ug/m3 0.077
Chloroform 41 pptv 10
Chloroform 0.20 ug/m3 0.049
1,2-Dichloroethane 25 pptv 10
1,2-Dichloroethane 0.10 ug/m3 0.040
Benzene 610 pptv 10
Benzene 1.9 ug/m3 0.032
Carbon Tetrachloride 71 pptv 10
Carbon Tetrachloride 0.45 ug/m3 0.063
Toluene 850 pptv 10
Toluene 3.2 ug/m3 0.038
Tetrachloroethene 17 pptv 10
Tetrachloroethene 0.12 ug/m3 0.068
Ethylbenzene 190 pptv 10
Ethylbenzene 0.84 ug/m3 0.043
m,p-Xylenes 570 pptv 10
m,p-Xylenes 2.5 ug/m3 0.043
Styrene 85 pptv 10
Styrene 0.36 ug/m3 0.043
o-Xylene 200 pptv 10
o-Xylene 0.87 ug/m3 0.043
1,3,5-Trimethylbenzene 62 pptv 10
1,3,5-Trimethylbenzene 0.30 ug/m3 0.049
1,2,4-Trimethylbenzene 220 pptv 10
1,2,4-Trimethylbenzene 1.1 ug/m3 0.049
Naphthalene 11 pptv 10
Naphthalene 0.060 ug/m3 0.052
Xylene (total) 770 pptv 10
Xylene (total) 3.3 ug/m3 0.043
7 of 7 v12.0
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 10 of 30 tEa2o
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11 of 30

SAMPLE RECEIPT CHECKLIST
Section
Date Received
1: Genera!
| 121
lnfo
16124 ylgn 522442 Client: Catalyst Environmental Solutions tNlltAlt'\ .a
Section 2: Shipping / Custody
Custody seals intact on arrival? EI N/A E Yes i l',to
Are custody seals present? E Yes E) No
E On cooler / box - On samples
Shipping lnfo:

Section 3a: Condition / Packaging E Outside 0.0 - 6.0'C (0.0 - 10.0"C for microbioloCy) (PM notified) Date opened 12116124 By (initials)TLK Type of ice used : E Wet E Blue/Gel E None E Samples received on ice directly from the field; cooling process had begun. (if checked, skip temperatures) E Sample matrix doesn't require cooling (e.g. air, bulk PCB). (if checked, skip temperatures) lfnocooler:observed/AdjustedTemp(.c):-l-Thermometer/lRGun:-CF:- Cooler Temp ('C) #1: / #2: / #3: / #4: I #5: / #6: I
Section 3b: Microbiolory Samples
tr Within temp range 0.0 - 10.0'C or received on ice directly from field.

EI Adequate headspace for microbiology analysis,
I No microbiology samples submitted (skip 3b)
Section 3c: Air Samples
E 1.41 Canisters A 6L canisters E Tedlar Bags
E No air samples submitted (skip 3c)
E UCf Cassettes fl Sorbent Tubes E Other
Section 4: Containers / tabels / Samples YES NO N/A
1) Were custody papers present, filled properly, and legible? x 2) ls the sampler's name present on the CoC? x
3) Were containers received in good condition (unbroken / unopened / uncompromised)? x 4) Were the samples bagged? (required for microbiology samples; recommended for soil samples) x 5) Were all of, and only, the correct samples received? x 5) Are sample labels present, legible, and in agreement with the CoC? x 7) Does the container count match the CoC?
8) Was sufficient sample volume / mass received for the analyses requested? x
x
9) Were samples received in proper containers for the analyses requested? x 10) Were samples received with > U2 holding time remaining? x 11) Are samples properly preserved as indicated by CoC / labels? x 12) Unpreserved VOAs received - lf necessary, was the hold time changed in LIMS? x 13) Are VOA vials free from headspace/bubbles > 6mm? x
Section 5: Explanations / Comments E PM notified
Date logged 12116124
12n6t%
By (prin1)Tris Kelly
Date labeled By (print;Tris Kelly ,.y?
Enthalpy Analytical J-0006, Rev 2: Form Version 76.70a1224 12 of 30
Field ID: WB02-14D-R2 Batch#: 358120 Prep: METHOD
Lab ID: 522442-001 Sampled: 12/16/24 14:03 Analysis: EPA TO-15 SIM Matrix: Air Received: 12/16/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 12/18/24 02:12
522442-001 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 440 10 pptv 2.2 0.049 ug/m3
Chloromethane 540 100 pptv 1.1 0.21 ug/m3
Freon 114 15 10 pptv 0.10 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 38 10 pptv 0.15 0.039 ug/m3
Chloroethane ND 10 pptv ND 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 190 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 240 20 pptv 0.84 0.069 ug/m3
Freon 113 60 10 pptv 0.46 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 39 10 pptv 0.19 0.049 ug/m3
1,2-Dichloroethane 26 10 pptv 0.10 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 600 10 pptv 1.9 0.032 ug/m3
Carbon Tetrachloride 70 10 pptv 0.44 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 870 10 pptv 3.3 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene 15 10 pptv 0.10 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 200 10 pptv 0.88 0.043 ug/m3
m,p-Xylenes 580 10 pptv 2.5 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 96 10 pptv 0.41 0.043 ug/m3
o-Xylene 220 10 pptv 0.95 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 68 10 pptv 0.34 0.049 ug/m3
1,2,4-Trimethylbenzene 240 10 pptv 1.2 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene 14 10 pptv 0.082 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene 30 10 pptv 0.15 0.052 ug/m3
1 of 2 v2
Enthalpy Analytical - Orange Analytical Report
Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 13 of 30
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 800 10 pptv 3.5 0.043 ug/m3
522442-001 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 522442-001 Surrogate %REC Limits Units (M)
Bromofluorobenzene 96 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v2
Enthalpy Analytical - Orange Analytical Report
Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 14 of 30
Field ID: WB03-14D-R2 Batch#: 358299 Prep: METHOD
Lab ID: 522442-002 Sampled: 12/16/24 14:10 Analysis: EPA TO-15 SIM Matrix: Air Received: 12/16/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 12/18/24 12:27
522442-002 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 440 10 pptv 2.2 0.049 ug/m3
Chloromethane 550 100 pptv 1.1 0.21 ug/m3
Freon 114 15 10 pptv 0.10 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 40 10 pptv 0.16 0.039 ug/m3
Chloroethane ND 10 pptv ND 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 190 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 270 20 pptv 0.93 0.069 ug/m3
Freon 113 61 10 pptv 0.47 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 40 10 pptv 0.20 0.049 ug/m3
1,2-Dichloroethane 24 10 pptv 0.097 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 540 10 pptv 1.7 0.032 ug/m3
Carbon Tetrachloride 72 10 pptv 0.45 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 860 10 pptv 3.2 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene 16 10 pptv 0.11 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 170 10 pptv 0.73 0.043 ug/m3
m,p-Xylenes 540 10 pptv 2.3 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 110 10 pptv 0.46 0.043 ug/m3
o-Xylene 200 10 pptv 0.89 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 54 10 pptv 0.26 0.049 ug/m3
1,2,4-Trimethylbenzene 190 10 pptv 0.92 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene 15 10 pptv 0.092 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene 21 10 pptv 0.11 0.052 ug/m3
1 of 2 v3
Enthalpy Analytical - Orange Analytical Report
Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 15 of 30
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 740 10 pptv 3.2 0.043 ug/m3
522442-002 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 522442-002 Surrogate %REC Limits Units (M)
Bromofluorobenzene 102 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v3
Enthalpy Analytical - Orange Analytical Report
Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 16 of 30
Field ID: WB05-14D-R2 Batch#: 358120 Prep: METHOD
Lab ID: 522442-003 Sampled: 12/16/24 14:15 Analysis: EPA TO-15 SIM Matrix: Air Received: 12/16/24 Analyst: OHD
Diln Fac: 1.100 Analyzed: 12/18/24 03:00
522442-003 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 440 11 pptv 2.2 0.054 ug/m3
Chloromethane 540 110 pptv 1.1 0.23 ug/m3
Freon 114 15 11 pptv 0.10 0.077 ug/m3
Vinyl Chloride ND 11 pptv ND 0.028 ug/m3
Bromomethane 39 11 pptv 0.15 0.043 ug/m3
Chloroethane ND 11 pptv ND 0.029 ug/m3
Vinyl bromide ND 11 pptv ND 0.048 ug/m3
Trichlorofluoromethane 190 11 pptv 1.1 0.062 ug/m3
1,1-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Methylene Chloride 260 22 pptv 0.91 0.076 ug/m3
Freon 113 61 11 pptv 0.47 0.084 ug/m3
trans-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
1,1-Dichloroethane ND 11 pptv ND 0.045 ug/m3
cis-1,2-Dichloroethene ND 11 pptv ND 0.044 ug/m3
Chloroform 39 11 pptv 0.19 0.054 ug/m3
1,2-Dichloroethane 24 11 pptv 0.096 0.045 ug/m3
1,1,1-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Benzene 550 11 pptv 1.7 0.035 ug/m3
Carbon Tetrachloride 71 11 pptv 0.45 0.069 ug/m3
1,2-Dichloropropane ND 11 pptv ND 0.051 ug/m3
Bromodichloromethane ND 11 pptv ND 0.074 ug/m3
Trichloroethene ND 11 pptv ND 0.059 ug/m3
cis-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
trans-1,3-Dichloropropene ND 11 pptv ND 0.050 ug/m3
1,1,2-Trichloroethane ND 11 pptv ND 0.060 ug/m3
Toluene 890 11 pptv 3.4 0.041 ug/m3
Dibromochloromethane ND 11 pptv ND 0.094 ug/m3
1,2-Dibromoethane ND 11 pptv ND 0.085 ug/m3
Tetrachloroethene 17 11 pptv 0.12 0.075 ug/m3
Chlorobenzene ND 11 pptv ND 0.051 ug/m3
Ethylbenzene 170 11 pptv 0.72 0.048 ug/m3
m,p-Xylenes 520 11 pptv 2.3 0.048 ug/m3
Bromoform ND 11 pptv ND 0.11 ug/m3
Styrene 110 11 pptv 0.47 0.047 ug/m3
o-Xylene 200 11 pptv 0.87 0.048 ug/m3
2-Chlorotoluene ND 11 pptv ND 0.057 ug/m3
1,3,5-Trimethylbenzene 68 11 pptv 0.33 0.054 ug/m3
1,2,4-Trimethylbenzene 260 11 pptv 1.3 0.054 ug/m3
Benzyl chloride ND 11 pptv ND 0.057 ug/m3
1,3-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,4-Dichlorobenzene 15 11 pptv 0.090 0.066 ug/m3
1,2-Dichlorobenzene ND 11 pptv ND 0.066 ug/m3
1,2,4-Trichlorobenzene ND 11 pptv ND 0.082 ug/m3
1,1,2,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
1,1,1,2-Tetrachloroethane ND 11 pptv ND 0.076 ug/m3
Naphthalene 31 11 pptv 0.16 0.058 ug/m3
1 of 2 v4
Enthalpy Analytical - Orange Analytical Report
Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 17 of 30
Hexachlorobutadiene ND 11 pptv ND 0.12 ug/m3
Xylene (total) 720 11 pptv 3.1 0.048 ug/m3
522442-003 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 522442-003 Surrogate %REC Limits Units (M)
Bromofluorobenzene 100 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v4
Enthalpy Analytical - Orange Analytical Report
Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 18 of 30
Field ID: WB10-14D-R2 Batch#: 358120 Prep: METHOD
Lab ID: 522442-004 Sampled: 12/16/24 14:24 Analysis: EPA TO-15 SIM Matrix: Air Received: 12/16/24 Analyst: OHD
Diln Fac: 1.000 Analyzed: 12/18/24 03:49
522442-004 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 440 10 pptv 2.2 0.049 ug/m3
Chloromethane 550 100 pptv 1.1 0.21 ug/m3
Freon 114 15 10 pptv 0.10 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane 37 10 pptv 0.15 0.039 ug/m3
Chloroethane ND 10 pptv ND 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane 190 10 pptv 1.1 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride 250 20 pptv 0.87 0.069 ug/m3
Freon 113 60 10 pptv 0.46 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform 41 10 pptv 0.20 0.049 ug/m3
1,2-Dichloroethane 25 10 pptv 0.10 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene 610 10 pptv 1.9 0.032 ug/m3
Carbon Tetrachloride 71 10 pptv 0.45 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene 850 10 pptv 3.2 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene 17 10 pptv 0.12 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene 190 10 pptv 0.84 0.043 ug/m3
m,p-Xylenes 570 10 pptv 2.5 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene 85 10 pptv 0.36 0.043 ug/m3
o-Xylene 200 10 pptv 0.87 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene 62 10 pptv 0.30 0.049 ug/m3
1,2,4-Trimethylbenzene 220 10 pptv 1.1 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene 11 10 pptv 0.060 0.052 ug/m3
1 of 2 v5
Enthalpy Analytical - Orange Analytical Report
Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 19 of 30
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) 770 10 pptv 3.3 0.043 ug/m3
522442-004 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) 522442-004 Surrogate %REC Limits Units (M)
Bromofluorobenzene 96 60-140 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v5
Enthalpy Analytical - Orange Analytical Report
Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 20 of 30
Type: BS Diln Fac: 1.000 Prep: METHOD
Lab ID: QC1212995 Batch#: 358120 Analysis: EPA TO-15 SIM Matrix: Air Analyzed: 12/17/24 09:37 Analyst: OHD
QC1212995 Analyte Spiked Result (V) Units (V) %REC Limits Freon 12 100.0 100.6 pptv 101 70-130
Chloromethane 100.0 103.1 pptv 103 70-130
Freon 114 100.0 101.4 pptv 101 70-130
Vinyl Chloride 100.0 102.1 pptv 102 70-130
Bromomethane 100.0 100.7 pptv 101 70-130
Chloroethane 100.0 98.78 pptv 99 70-130
Vinyl bromide 100.0 103.4 pptv 103 70-130
Trichlorofluoromethane 100.0 100.9 pptv 101 70-130
1,1-Dichloroethene 100.0 104.4 pptv 104 70-130
Methylene Chloride 100.0 100.7 pptv 101 70-130
Freon 113 100.0 101.5 pptv 102 70-130
trans-1,2-Dichloroethene 100.0 101.7 pptv 102 70-130
1,1-Dichloroethane 100.0 101.2 pptv 101 70-130
cis-1,2-Dichloroethene 100.0 101.5 pptv 102 70-130
Chloroform 100.0 101.0 pptv 101 70-130
1,2-Dichloroethane 100.0 100.2 pptv 100 70-130
1,1,1-Trichloroethane 100.0 99.82 pptv 100 70-130
Benzene 100.0 96.86 pptv 97 70-130
Carbon Tetrachloride 100.0 98.68 pptv 99 70-130
1,2-Dichloropropane 100.0 101.8 pptv 102 70-130
Bromodichloromethane 100.0 98.05 pptv 98 70-130
Trichloroethene 100.0 101.5 pptv 102 70-130
cis-1,3-Dichloropropene 100.0 101.3 pptv 101 70-130
trans-1,3-Dichloropropene 100.0 101.2 pptv 101 70-130
1,1,2-Trichloroethane 100.0 100.7 pptv 101 70-130
Toluene 100.0 88.25 pptv 88 70-130
Dibromochloromethane 100.0 96.65 pptv 97 70-130
1,2-Dibromoethane 100.0 98.05 pptv 98 70-130
Tetrachloroethene 100.0 103.7 pptv 104 70-130
Chlorobenzene 100.0 100.5 pptv 101 70-130
Ethylbenzene 100.0 97.08 pptv 97 70-130
m,p-Xylenes 200.0 191.6 pptv 96 70-130
Bromoform 100.0 96.20 pptv 96 70-130
Styrene 100.0 114.0 pptv 114 70-130
o-Xylene 100.0 97.59 pptv 98 70-130
2-Chlorotoluene 100.0 98.76 pptv 99 70-130
1,3,5-Trimethylbenzene 100.0 126.4 pptv 126 70-130
1,2,4-Trimethylbenzene 100.0 110.1 pptv 110 70-130
Benzyl chloride 100.0 90.91 pptv 91 70-130
1,3-Dichlorobenzene 100.0 100.7 pptv 101 70-130
1,4-Dichlorobenzene 100.0 97.99 pptv 98 70-130
1,2-Dichlorobenzene 100.0 97.58 pptv 98 70-130
1,2,4-Trichlorobenzene 100.0 85.15 pptv 85 70-130
1,1,2,2-Tetrachloroethane 100.0 100.7 pptv 101 70-130
1,1,1,2-Tetrachloroethane 100.0 98.44 pptv 98 70-130
Naphthalene 100.0 79.44 pptv 79 70-130
Hexachlorobutadiene 100.0 90.53 pptv 91 70-130
1 of 3 v6
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 21 of 30
QC1212995 Surrogate %REC Limits
Bromofluorobenzene 104 70-130
Type: BSD Diln Fac: 1.000 Prep: METHOD
Lab ID: QC1212996 Batch#: 358120 Analysis: EPA TO-15 SIM Matrix: Air Analyzed: 12/17/24 10:20 Analyst: OHD
QC1212996 Analyte Spiked Result (V) Units (V) %REC Limits RPD Lim Freon 12 100.0 102.8 pptv 103 70-130 2 25
Chloromethane 100.0 105.4 pptv 105 70-130 2 25
Freon 114 100.0 103.2 pptv 103 70-130 2 25
Vinyl Chloride 100.0 104.5 pptv 105 70-130 2 25
Bromomethane 100.0 104.0 pptv 104 70-130 3 25
Chloroethane 100.0 101.2 pptv 101 70-130 2 25
Vinyl bromide 100.0 105.6 pptv 106 70-130 2 25
Trichlorofluoromethane 100.0 103.1 pptv 103 70-130 2 25 1,1-Dichloroethene 100.0 106.4 pptv 106 70-130 2 25
Methylene Chloride 100.0 102.5 pptv 102 70-130 2 25
Freon 113 100.0 103.5 pptv 103 70-130 2 25
trans-1,2-Dichloroethene 100.0 103.4 pptv 103 70-130 2 25 1,1-Dichloroethane 100.0 103.1 pptv 103 70-130 2 25
cis-1,2-Dichloroethene 100.0 103.4 pptv 103 70-130 2 25 Chloroform 100.0 103.0 pptv 103 70-130 2 25
1,2-Dichloroethane 100.0 102.6 pptv 103 70-130 2 25
1,1,1-Trichloroethane 100.0 101.4 pptv 101 70-130 2 25
Benzene 100.0 98.66 pptv 99 70-130 2 25
Carbon Tetrachloride 100.0 100.5 pptv 100 70-130 2 25
1,2-Dichloropropane 100.0 104.8 pptv 105 70-130 3 25
Bromodichloromethane 100.0 100.9 pptv 101 70-130 3 25
Trichloroethene 100.0 104.1 pptv 104 70-130 3 25
cis-1,3-Dichloropropene 100.0 103.9 pptv 104 70-130 3 25 trans-1,3-Dichloropropene 100.0 104.4 pptv 104 70-130 3 25 1,1,2-Trichloroethane 100.0 103.3 pptv 103 70-130 3 25
Toluene 100.0 90.34 pptv 90 70-130 2 25
Dibromochloromethane 100.0 99.56 pptv 100 70-130 3 25
1,2-Dibromoethane 100.0 101.1 pptv 101 70-130 3 25
Tetrachloroethene 100.0 106.4 pptv 106 70-130 3 25
Chlorobenzene 100.0 103.8 pptv 104 70-130 3 25
Ethylbenzene 100.0 99.32 pptv 99 70-130 2 25
m,p-Xylenes 200.0 196.6 pptv 98 70-130 3 25
Bromoform 100.0 98.34 pptv 98 70-130 2 25
Styrene 100.0 116.8 pptv 117 70-130 2 25
o-Xylene 100.0 100.3 pptv 100 70-130 3 25
2-Chlorotoluene 100.0 101.1 pptv 101 70-130 2 25
1,3,5-Trimethylbenzene 100.0 129.7 pptv 130 70-130 3 25 1,2,4-Trimethylbenzene 100.0 113.5 pptv 114 70-130 3 25 Benzyl chloride 100.0 94.91 pptv 95 70-130 4 25
1,3-Dichlorobenzene 100.0 104.3 pptv 104 70-130 3 25
1,4-Dichlorobenzene 100.0 102.0 pptv 102 70-130 4 25
1,2-Dichlorobenzene 100.0 101.1 pptv 101 70-130 4 25
1,2,4-Trichlorobenzene 100.0 88.47 pptv 88 70-130 4 25
1,1,2,2-Tetrachloroethane 100.0 104.1 pptv 104 70-130 3 25 1,1,1,2-Tetrachloroethane 100.0 101.8 pptv 102 70-130 3 25 2 of 3 v6
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 22 of 30
Naphthalene 100.0 82.72 pptv 83 70-130 4 25
Hexachlorobutadiene 100.0 93.77 pptv 94 70-130 4 25
QC1212996 Analyte Spiked Result (V) Units (V) %REC Limits RPD Lim QC1212996 Surrogate %REC Limits
Bromofluorobenzene 103 70-130
Legend
RPD:

Relative Percent
Difference
Result
(V):

Result in volume units
3 of 3 v6
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 23 of 30
Type: BLANK Diln Fac: 1.000 Prep: METHOD
Lab ID: QC1212997 Batch#: 358120 Analysis: EPA TO-15 SIM Matrix: Air Analyzed: 12/17/24 11:49 Analyst: OHD
QC1212997 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 ND 10 pptv ND 0.049 ug/m3
Chloromethane ND 100 pptv ND 0.21 ug/m3
Freon 114 ND 10 pptv ND 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane ND 10 pptv ND 0.039 ug/m3
Chloroethane ND 10 pptv ND 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane ND 10 pptv ND 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride ND 20 pptv ND 0.069 ug/m3
Freon 113 ND 10 pptv ND 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform ND 10 pptv ND 0.049 ug/m3
1,2-Dichloroethane ND 10 pptv ND 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene ND 10 pptv ND 0.032 ug/m3
Carbon Tetrachloride ND 10 pptv ND 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene ND 10 pptv ND 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene ND 10 pptv ND 0.043 ug/m3
m,p-Xylenes ND 10 pptv ND 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene ND 10 pptv ND 0.043 ug/m3
o-Xylene ND 10 pptv ND 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene ND 10 pptv ND 0.049 ug/m3
1,2,4-Trimethylbenzene ND 10 pptv ND 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene ND 10 pptv ND 0.052 ug/m3
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) ND 10 pptv ND 0.043 ug/m3
1 of 2 v7
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 24 of 30
QC1212997 Surrogate %REC Limits Units (M)
Bromofluorobenzene 90 70-130 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v7
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 25 of 30
Type: BS Diln Fac: 1.000 Prep: METHOD
Lab ID: QC1213576 Batch#: 358299 Analysis: EPA TO-15 SIM Matrix: Air Analyzed: 12/18/24 07:32 Analyst: OHD
QC1213576 Analyte Spiked Result (V) Units (V) %REC Limits Freon 12 100.0 100.2 pptv 100 70-130
Chloromethane 100.0 101.4 pptv 101 70-130
Freon 114 100.0 100.3 pptv 100 70-130
Vinyl Chloride 100.0 101.1 pptv 101 70-130
Bromomethane 100.0 98.00 pptv 98 70-130
Chloroethane 100.0 98.99 pptv 99 70-130
Vinyl bromide 100.0 103.1 pptv 103 70-130
Trichlorofluoromethane 100.0 100.2 pptv 100 70-130
1,1-Dichloroethene 100.0 104.9 pptv 105 70-130
Methylene Chloride 100.0 98.92 pptv 99 70-130
Freon 113 100.0 101.1 pptv 101 70-130
trans-1,2-Dichloroethene 100.0 101.6 pptv 102 70-130
1,1-Dichloroethane 100.0 100.6 pptv 101 70-130
cis-1,2-Dichloroethene 100.0 101.6 pptv 102 70-130
Chloroform 100.0 100.3 pptv 100 70-130
1,2-Dichloroethane 100.0 99.12 pptv 99 70-130
1,1,1-Trichloroethane 100.0 99.45 pptv 99 70-130
Benzene 100.0 97.97 pptv 98 70-130
Carbon Tetrachloride 100.0 97.79 pptv 98 70-130
1,2-Dichloropropane 100.0 100.5 pptv 100 70-130
Bromodichloromethane 100.0 96.32 pptv 96 70-130
Trichloroethene 100.0 100.0 pptv 100 70-130
cis-1,3-Dichloropropene 100.0 101.6 pptv 102 70-130
trans-1,3-Dichloropropene 100.0 100.8 pptv 101 70-130
1,1,2-Trichloroethane 100.0 98.92 pptv 99 70-130
Toluene 100.0 88.32 pptv 88 70-130
Dibromochloromethane 100.0 95.28 pptv 95 70-130
1,2-Dibromoethane 100.0 96.75 pptv 97 70-130
Tetrachloroethene 100.0 102.3 pptv 102 70-130
Chlorobenzene 100.0 100.5 pptv 101 70-130
Ethylbenzene 100.0 97.87 pptv 98 70-130
m,p-Xylenes 200.0 194.0 pptv 97 70-130
Bromoform 100.0 94.91 pptv 95 70-130
Styrene 100.0 115.8 pptv 116 70-130
o-Xylene 100.0 99.24 pptv 99 70-130
2-Chlorotoluene 100.0 99.33 pptv 99 70-130
1,3,5-Trimethylbenzene 100.0 127.0 pptv 127 70-130
1,2,4-Trimethylbenzene 100.0 110.5 pptv 110 70-130
Benzyl chloride 100.0 90.53 pptv 91 70-130
1,3-Dichlorobenzene 100.0 99.84 pptv 100 70-130
1,4-Dichlorobenzene 100.0 96.97 pptv 97 70-130
1,2-Dichlorobenzene 100.0 96.94 pptv 97 70-130
1,2,4-Trichlorobenzene 100.0 83.43 pptv 83 70-130
1,1,2,2-Tetrachloroethane 100.0 98.86 pptv 99 70-130
1,1,1,2-Tetrachloroethane 100.0 98.31 pptv 98 70-130
Naphthalene 100.0 77.14 pptv 77 70-130
Hexachlorobutadiene 100.0 88.25 pptv 88 70-130
1 of 3 v8
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 26 of 30
QC1213576 Surrogate %REC Limits
Bromofluorobenzene 104 70-130
Type: BSD Diln Fac: 1.000 Prep: METHOD
Lab ID: QC1213577 Batch#: 358299 Analysis: EPA TO-15 SIM Matrix: Air Analyzed: 12/18/24 08:15 Analyst: OHD
QC1213577 Analyte Spiked Result (V) Units (V) %REC Limits RPD Lim Freon 12 100.0 100.6 pptv 101 70-130 0 25
Chloromethane 100.0 102.8 pptv 103 70-130 1 25
Freon 114 100.0 101.3 pptv 101 70-130 1 25
Vinyl Chloride 100.0 101.8 pptv 102 70-130 1 25
Bromomethane 100.0 101.9 pptv 102 70-130 4 25
Chloroethane 100.0 98.93 pptv 99 70-130 0 25
Vinyl bromide 100.0 104.2 pptv 104 70-130 1 25
Trichlorofluoromethane 100.0 101.1 pptv 101 70-130 1 25 1,1-Dichloroethene 100.0 105.4 pptv 105 70-130 0 25
Methylene Chloride 100.0 100.4 pptv 100 70-130 2 25
Freon 113 100.0 101.7 pptv 102 70-130 1 25
trans-1,2-Dichloroethene 100.0 102.4 pptv 102 70-130 1 25 1,1-Dichloroethane 100.0 101.2 pptv 101 70-130 1 25
cis-1,2-Dichloroethene 100.0 102.0 pptv 102 70-130 0 25 Chloroform 100.0 101.3 pptv 101 70-130 1 25
1,2-Dichloroethane 100.0 100.2 pptv 100 70-130 1 25
1,1,1-Trichloroethane 100.0 100.2 pptv 100 70-130 1 25
Benzene 100.0 98.41 pptv 98 70-130 0 25
Carbon Tetrachloride 100.0 98.75 pptv 99 70-130 1 25
1,2-Dichloropropane 100.0 101.4 pptv 101 70-130 1 25
Bromodichloromethane 100.0 97.14 pptv 97 70-130 1 25
Trichloroethene 100.0 101.4 pptv 101 70-130 1 25
cis-1,3-Dichloropropene 100.0 100.8 pptv 101 70-130 1 25 trans-1,3-Dichloropropene 100.0 101.1 pptv 101 70-130 0 25 1,1,2-Trichloroethane 100.0 99.73 pptv 100 70-130 1 25
Toluene 100.0 88.98 pptv 89 70-130 1 25
Dibromochloromethane 100.0 95.56 pptv 96 70-130 0 25
1,2-Dibromoethane 100.0 97.91 pptv 98 70-130 1 25
Tetrachloroethene 100.0 103.9 pptv 104 70-130 2 25
Chlorobenzene 100.0 101.7 pptv 102 70-130 1 25
Ethylbenzene 100.0 98.57 pptv 99 70-130 1 25
m,p-Xylenes 200.0 194.6 pptv 97 70-130 0 25
Bromoform 100.0 95.85 pptv 96 70-130 1 25
Styrene 100.0 116.8 pptv 117 70-130 1 25
o-Xylene 100.0 98.85 pptv 99 70-130 0 25
2-Chlorotoluene 100.0 101.0 pptv 101 70-130 2 25
1,3,5-Trimethylbenzene 100.0 128.5 pptv 129 70-130 1 25 1,2,4-Trimethylbenzene 100.0 113.2 pptv 113 70-130 2 25 Benzyl chloride 100.0 92.68 pptv 93 70-130 2 25
1,3-Dichlorobenzene 100.0 101.8 pptv 102 70-130 2 25
1,4-Dichlorobenzene 100.0 98.99 pptv 99 70-130 2 25
1,2-Dichlorobenzene 100.0 98.17 pptv 98 70-130 1 25
1,2,4-Trichlorobenzene 100.0 86.20 pptv 86 70-130 3 25
1,1,2,2-Tetrachloroethane 100.0 100.2 pptv 100 70-130 1 25 1,1,1,2-Tetrachloroethane 100.0 98.81 pptv 99 70-130 1 25 2 of 3 v8
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 27 of 30
Naphthalene 100.0 80.37 pptv 80 70-130 4 25
Hexachlorobutadiene 100.0 90.16 pptv 90 70-130 2 25
QC1213577 Analyte Spiked Result (V) Units (V) %REC Limits RPD Lim QC1213577 Surrogate %REC Limits
Bromofluorobenzene 104 70-130
Legend
RPD:

Relative Percent
Difference
Result
(V):

Result in volume units
3 of 3 v8
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 28 of 30
Type: BLANK Diln Fac: 1.000 Prep: METHOD
Lab ID: QC1213578 Batch#: 358299 Analysis: EPA TO-15 SIM Matrix: Air Analyzed: 12/18/24 09:45 Analyst: OHD
QC1213578 Analyte Result (V) RL (V) Units (V) Result (M) RL (M) Units (M) Freon 12 ND 10 pptv ND 0.049 ug/m3
Chloromethane ND 100 pptv ND 0.21 ug/m3
Freon 114 ND 10 pptv ND 0.070 ug/m3
Vinyl Chloride ND 10 pptv ND 0.026 ug/m3
Bromomethane ND 10 pptv ND 0.039 ug/m3
Chloroethane ND 10 pptv ND 0.026 ug/m3
Vinyl bromide ND 10 pptv ND 0.044 ug/m3
Trichlorofluoromethane ND 10 pptv ND 0.056 ug/m3
1,1-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Methylene Chloride ND 20 pptv ND 0.069 ug/m3
Freon 113 ND 10 pptv ND 0.077 ug/m3
trans-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
1,1-Dichloroethane ND 10 pptv ND 0.040 ug/m3
cis-1,2-Dichloroethene ND 10 pptv ND 0.040 ug/m3
Chloroform ND 10 pptv ND 0.049 ug/m3
1,2-Dichloroethane ND 10 pptv ND 0.040 ug/m3
1,1,1-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Benzene ND 10 pptv ND 0.032 ug/m3
Carbon Tetrachloride ND 10 pptv ND 0.063 ug/m3
1,2-Dichloropropane ND 10 pptv ND 0.046 ug/m3
Bromodichloromethane ND 10 pptv ND 0.067 ug/m3
Trichloroethene ND 10 pptv ND 0.054 ug/m3
cis-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
trans-1,3-Dichloropropene ND 10 pptv ND 0.045 ug/m3
1,1,2-Trichloroethane ND 10 pptv ND 0.055 ug/m3
Toluene ND 10 pptv ND 0.038 ug/m3
Dibromochloromethane ND 10 pptv ND 0.085 ug/m3
1,2-Dibromoethane ND 10 pptv ND 0.077 ug/m3
Tetrachloroethene ND 10 pptv ND 0.068 ug/m3
Chlorobenzene ND 10 pptv ND 0.046 ug/m3
Ethylbenzene ND 10 pptv ND 0.043 ug/m3
m,p-Xylenes ND 10 pptv ND 0.043 ug/m3
Bromoform ND 10 pptv ND 0.10 ug/m3
Styrene ND 10 pptv ND 0.043 ug/m3
o-Xylene ND 10 pptv ND 0.043 ug/m3
2-Chlorotoluene ND 10 pptv ND 0.052 ug/m3
1,3,5-Trimethylbenzene ND 10 pptv ND 0.049 ug/m3
1,2,4-Trimethylbenzene ND 10 pptv ND 0.049 ug/m3
Benzyl chloride ND 10 pptv ND 0.052 ug/m3
1,3-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,4-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2-Dichlorobenzene ND 10 pptv ND 0.060 ug/m3
1,2,4-Trichlorobenzene ND 10 pptv ND 0.074 ug/m3
1,1,2,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
1,1,1,2-Tetrachloroethane ND 10 pptv ND 0.069 ug/m3
Naphthalene ND 10 pptv ND 0.052 ug/m3
Hexachlorobutadiene ND 10 pptv ND 0.11 ug/m3
Xylene (total) ND 10 pptv ND 0.043 ug/m3
1 of 2 v9
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 29 of 30
QC1213578 Surrogate %REC Limits Units (M)
Bromofluorobenzene 90 70-130 ug/m3
Legend
ND: Not Detected
RL (V): Reporting Limit
Result (M): Result in mass units
Result (V): Result in volume units
2 of 2 v9
Enthalpy Analytical - Orange Analytical Report: Batch QC Lab #: 522442 Project#: STANDARD
Client: Catalyst Environmental Solutions Location: Walnut Bluff Workplan 30 of 30
Yola Bayram
Catalyst Environmental Solutions
315 Montana Avenue
Suite 311
Santa Monica, CA 90403
Lab Job #: 518235
Location: Walnut Bluff Workplan
Date Received: 10/15/24
Client Sample ID Lab Sample ID Equipment Cert Equipment ID Type Cleaning Batch WB01-14D 518235-001 TO15 SIM Indv. C70196 6L Canister 5884 WB02-14D 518235-002 TO15 SIM Indv. C70903 6L Canister 5908 WB03-14D 518235-003 TO15 SIM Indv. C70059 6L Canister 5854 WB04-14D 518235-004 TO15 SIM Indv. C70932 6L Canister 5914 WB05-14D 518235-005 TO15 SIM Indv. C70800 6L Canister 5890 WB06-14D 518235-006 TO15 SIM Indv. C70916 6L Canister 5908 WB07-14D 518235-007 TO15 SIM Indv. C70901 6L Canister 5908 WB08-14D 518235-008 TO15 SIM Indv. C70914 6L Canister 5908 WB09-14D 518235-009 TO15 SIM Indv. C70012 6L Canister 5890 WB10-14D 518235-010 TO15 SIM Indv. C70331 6L Canister 5890 WB11-14D 518235-011 TO15 SIM Indv. C70352 6L Canister 5883 WB12-14D 518235-012 TO15 SIM Indv. C70908 6L Canister 5908 WB13-14D 518235-013 TO15 SIM Indv. C70249 6L Canister 5890 WB14-14D 518235-014 TO15 SIM Indv. C70309 6L Canister 5890 WB17-14D 518235-015 TO15 SIM Indv. C70812 6L Canister 5883 WB18-14D 518235-016 TO15 SIM Indv. C70938 6L Canister 5914 WB19-14D 518235-017 TO15 SIM Indv. C70081 6L Canister 5890 Cleaning Batch Check Run Equipment ID Type
5854 374364761015 C70059 6L Canister
5883 504376376016 C70812 6L Canister
5883 504376376021 C70352 6L Canister
5884 504376376019 C70196 6L Canister
5890 504377891012 C70249 6L Canister
5890 504377891019 C70331 6L Canister
5890 504377891020 C70012 6L Canister
5890 504377891023 C70800 6L Canister
5890 504377891024 C70081 6L Canister
5890 504377891028 C70309 6L Canister
5908 504384909010 C70901 6L Canister
5908 504384909016 C70903 6L Canister
5908 504384909017 C70914 6L Canister
5908 504384909019 C70916 6L Canister
5908 504386383008 C70908 6L Canister
5914 504384909015 C70932 6L Canister
5914 504384909018 C70938 6L Canister
Cleaning
Batch Started Completed Pressure Status
5854 09/06/24 12:41 09/09/24 06:27 <0.05 mmHg Successful 5883 09/13/24 14:35 09/14/24 08:29 <0.05 mmHg Successful 5884 09/14/24 09:14 09/16/24 06:17 <0.05 mmHg Successful 5890 09/16/24 14:14 09/17/24 05:07 <0.05 mmHg Successful 5908 09/19/24 16:35 09/20/24 05:02 <0.05 mmHg Successful 1 of 19
Equipment Certification Report for 518235
5914 09/21/24 12:43 09/22/24 09:04 <0.05 mmHg Successful Cleaning
Batch Started Completed Pressure Status
2 of 19
Equipment Certification Report for 518235
Check Run: 504377891024 Analysis Date/Time: 19-SEP-2024 04:05:00 Equipment ID: C70081 C70081 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 3 of 19
Equipment Certification Report for 518235
Check Run: 504384909017 Analysis Date/Time: 23-SEP-2024 19:31:00 Equipment ID: C70914 C70914 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 4 of 19
Equipment Certification Report for 518235
Check Run: 504377891012 Analysis Date/Time: 18-SEP-2024 18:35:00 Equipment ID: C70249 C70249 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 5 of 19
Equipment Certification Report for 518235
Check Run: 504384909010 Analysis Date/Time: 23-SEP-2024 13:58:00 Equipment ID: C70901 C70901 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 6 of 19
Equipment Certification Report for 518235
Check Run: 504377891020 Analysis Date/Time: 19-SEP-2024 00:55:00 Equipment ID: C70012 C70012 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 7 of 19
Equipment Certification Report for 518235
Check Run: 504384909019 Analysis Date/Time: 23-SEP-2024 21:06:00 Equipment ID: C70916 C70916 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 8 of 19
Equipment Certification Report for 518235
Check Run: 504386383008 Analysis Date/Time: 24-SEP-2024 12:53:00 Equipment ID: C70908 C70908 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 9 of 19
Equipment Certification Report for 518235
Check Run: 504376376021 Analysis Date/Time: 18-SEP-2024 02:07:00 Equipment ID: C70352 C70352 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 10 of 19
Equipment Certification Report for 518235
Check Run: 504384909018 Analysis Date/Time: 23-SEP-2024 20:18:00 Equipment ID: C70938 C70938 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 11 of 19
Equipment Certification Report for 518235
Check Run: 504384909016 Analysis Date/Time: 23-SEP-2024 18:43:00 Equipment ID: C70903 C70903 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 12 of 19
Equipment Certification Report for 518235
Check Run: 504376376016 Analysis Date/Time: 17-SEP-2024 22:10:00 Equipment ID: C70812 C70812 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 13 of 19
Equipment Certification Report for 518235
Check Run: 504377891023 Analysis Date/Time: 19-SEP-2024 03:17:00 Equipment ID: C70800 C70800 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 14 of 19
Equipment Certification Report for 518235
Check Run: 504377891019 Analysis Date/Time: 19-SEP-2024 00:07:00 Equipment ID: C70331 C70331 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 15 of 19
Equipment Certification Report for 518235
Check Run: 504376376019 Analysis Date/Time: 18-SEP-2024 00:32:00 Equipment ID: C70196 C70196 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 16 of 19
Equipment Certification Report for 518235
Check Run: 374364761015 Analysis Date/Time: 09-SEP-2024 18:04:00 Equipment ID: C70059 C70059 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 17 of 19
Equipment Certification Report for 518235
Check Run: 504384909015 Analysis Date/Time: 23-SEP-2024 17:55:00 Equipment ID: C70932 C70932 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 18 of 19
Equipment Certification Report for 518235
Check Run: 504377891028 Analysis Date/Time: 19-SEP-2024 07:16:00 Equipment ID: C70309 C70309 Analyte Method Result Result
1,1,1,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,1-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1,2,2-Tetrachloroethane EPA TO-15 SIM <10.00 pptv <0.06865 ug/m3 1,1,2-Trichloroethane EPA TO-15 SIM <10.00 pptv <0.05456 ug/m3 1,1-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,1-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 1,2,4-Trichlorobenzene EPA TO-15 SIM <10.00 pptv <0.07421 ug/m3 1,2,4-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,2-Dibromoethane EPA TO-15 SIM <10.00 pptv <0.07684 ug/m3 1,2-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,2-Dichloroethane EPA TO-15 SIM <10.00 pptv <0.04047 ug/m3 1,2-Dichloropropane EPA TO-15 SIM <10.00 pptv <0.04621 ug/m3 1,3,5-Trimethylbenzene EPA TO-15 SIM <10.00 pptv <0.04916 ug/m3 1,3-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 1,4-Dichlorobenzene EPA TO-15 SIM <10.00 pptv <0.06012 ug/m3 2-Chlorotoluene EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Benzene EPA TO-15 SIM <10.00 pptv <0.03195 ug/m3
Benzyl chloride EPA TO-15 SIM <10.00 pptv <0.05177 ug/m3 Bromodichloromethane EPA TO-15 SIM <10.00 pptv <0.06701 ug/m3 Bromoform EPA TO-15 SIM <10.00 pptv <0.1034 ug/m3
Bromomethane EPA TO-15 SIM <10.00 pptv <0.03883 ug/m3
Carbon Tetrachloride EPA TO-15 SIM <10.00 pptv <0.06291 ug/m3 Chlorobenzene EPA TO-15 SIM <10.00 pptv <0.04604 ug/m3
Chloroethane EPA TO-15 SIM <10.00 pptv <0.02639 ug/m3
Chloroform EPA TO-15 SIM <10.00 pptv <0.04883 ug/m3
Chloromethane EPA TO-15 SIM <100.0 pptv <0.2065 ug/m3
cis-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 cis-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Dibromochloromethane EPA TO-15 SIM <10.00 pptv <0.08519 ug/m3 Ethylbenzene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Freon 113 EPA TO-15 SIM <10.00 pptv <0.07664 ug/m3
Freon 114 EPA TO-15 SIM <10.00 pptv <0.06991 ug/m3
Freon 12 EPA TO-15 SIM <10.00 pptv <0.04945 ug/m3
Hexachlorobutadiene EPA TO-15 SIM <10.00 pptv <0.1067 ug/m3 m,p-Xylenes EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Methylene Chloride EPA TO-15 SIM <20.00 pptv <0.06947 ug/m3 Naphthalene EPA TO-15 SIM <10.00 pptv <0.05242 ug/m3
o-Xylene EPA TO-15 SIM <10.00 pptv <0.04342 ug/m3
Styrene EPA TO-15 SIM <10.00 pptv <0.04260 ug/m3
Tetrachloroethene EPA TO-15 SIM <10.00 pptv <0.06783 ug/m3 Toluene EPA TO-15 SIM <10.00 pptv <0.03769 ug/m3
trans-1,2-Dichloroethene EPA TO-15 SIM <10.00 pptv <0.03965 ug/m3 trans-1,3-Dichloropropene EPA TO-15 SIM <10.00 pptv <0.04539 ug/m3 Trichloroethene EPA TO-15 SIM <10.00 pptv <0.05374 ug/m3 Trichlorofluoromethane EPA TO-15 SIM <10.00 pptv <0.05618 ug/m3 Vinyl bromide EPA TO-15 SIM <10.00 pptv <0.04374 ug/m3
Vinyl Chloride EPA TO-15 SIM <10.00 pptv <0.02556 ug/m3 19 of 19
Equipment Certification Report for 518235
Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
February 2025
Appendix F
Laboratory Analytical Reports – 24 Hour Ssamples

Date of Report: 11/11/2024
Yola Byram
Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Client Project: Walnut Bluff Work Plan
Pace Project:

Pace Work Order:

Enclosed are the results of analyses for samples received by the laboratory on 10/ 11/2024. If you have any questions concerning this report, please feel free to contact me.

Invoice ID:
2416470
Walnut Bluff
B506047, B507754
Revised Report: This report supersedes Report ID 1001547513 Contact Person: Brianna Schutte
Sincerely,
Client Services Rep
Steve Bennett
Operations Manager
Certifications: CA ELAP #1186; NV #CA00014; OR ELAP #4032-001; AK UST101 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 1 of 48 Table of Contents
Sample Information
Chain of Custody and Cooler Receipt form.............................................................................................................................................. 3 Laboratory / Client Sample Cross Reference........................................................................................................................................... 7 Sample Results
2416470-01 - WB01-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 10 2416470-02 - WB02-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 12 2416470-03 - WB03-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 14 2416470-04 - WB04-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 16 2416470-05 - WB05-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 18 2416470-06 - WB06-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 20 2416470-07 - WB07-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 22 2416470-08 - WB08-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 24 2416470-09 - WB09-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 26 2416470-10 - WB10-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 28 2416470-11 - WB11-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 30 2416470-12 - WB12-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 32 2416470-13 - WB13-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 34 2416470-14 - WB14-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 36 2416470-15 - WB17-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 38 2416470-16 - WB18-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 40 2416470-17 - WB19-24H
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP)..................................................................................... 42 Quality Control Reports
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) Method Blank Analysis.............................................................................................................................................................. 44 Laboratory Control Sample........................................................................................................................................................ 46 Notes
Notes and Definitions................................................................................................................................................................ 48 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 2 of 48 Chain of Custody and Cooler Receipt Form for 2416470 Page 1 of 4 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 3 of 48 Chain of Custody and Cooler Receipt Form for 2416470 Page 2 of 4 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 4 of 48 Chain of Custody and Cooler Receipt Form for 2416470 Page 3 of 4 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 5 of 48 Chain of Custody and Cooler Receipt Form for 2416470 Page 4 of 4 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 6 of 48 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
Walnut Bluff Work Plan
Yola Byram
Reported: 11/11/2024 15:09
Laboratory / Client Sample Cross Reference
Laboratory Client Sample Information
2416470-01
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB01-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 11:48
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-02
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB02-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 12:38
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-03
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB03-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 12:42
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-04
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB04-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 12:44
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-05
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB05-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 12:46
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-06
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB06-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 13:05
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-07
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB07-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 13:08
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 7 of 48 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
Walnut Bluff Work Plan
Yola Byram
Reported: 11/11/2024 15:09
Laboratory / Client Sample Cross Reference
Laboratory Client Sample Information
2416470-08
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB08-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 13:11
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-09
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB09-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 12:20
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-10
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB10-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 13:44
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-11
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB11-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 14:13
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-12
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB12-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 12:30
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-13
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB13-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 13:50
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-14
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB14-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 13:55
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 8 of 48 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
Walnut Bluff Work Plan
Yola Byram
Reported: 11/11/2024 15:09
Laboratory / Client Sample Cross Reference
Laboratory Client Sample Information
2416470-15
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB17-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 14:31
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-16
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB18-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 14:45
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
2416470-17
Sampling Point:

Sampling Location:

Project Number:

COC Number: ---
---
--- WB19-24H
Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix: --- 10/11/2024 17:00
10/10/2024 14:21
Air
Sampled By: Elizabeth Hwang Sample Type: Vapor or Air
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 9 of 48 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
Walnut Bluff Work Plan
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416470-01 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB01-24H, 10/10/2024 11:48:00AM, Elizabeth Hwang

PQL MDL
Benzene 0.74 ug/m3 0.050 0.0032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 1 Carbon tetrachloride 0.47 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 1 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 1
Chloroform 0.15 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 1
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 1 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 1 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 1 1,4-Dichlorobenzene ND ug/m3 0.20 0.016 EPA-TO-15-SIM ND 1 Dichlorodifluoromethane 2.3 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 1 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 1 1,2-Dichloroethane 0.067 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND J 1 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 1 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 1 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 1 1,1-Difluoroethane 0.43 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 1 Ethylbenzene 0.29 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 1
Naphthalene 0.21 ug/m3 0.20 0.020 EPA-TO-15-SIM ND 1
Tetrachloroethene ND ug/m3 0.10 0.011 EPA-TO-15-SIM ND 1 Toluene 1.3 ug/m3 0.10 0.0062 EPA-TO-15-SIM ND 1
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 1 Trichlorofluoromethane 1.2 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 1 1,1,2-Trichloro-1,2,2-trifluoroethane 0.52 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 1 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 1 p- & m-Xylenes 0.94 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 1 o-Xylene 0.32 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1
Total Xylenes 1.3 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 1
4-Bromofluorobenzene (Surrogate) 96.9 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 96.9 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 10 of 48 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
Walnut Bluff Work Plan
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416470-01 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB01-24H, 10/10/2024 11:48:00AM, Elizabeth Hwang
1 EPA-TO-15-SIM 10/24/24 10:49 10/24/24 19:32 BEP MS-A2 1 B199628 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 11 of 48 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
Walnut Bluff Work Plan
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416470-02 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB02-24H, 10/10/2024 12:38:00PM, Elizabeth Hwang

PQL MDL
Benzene 0.88 ug/m3 0.050 0.0032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 1 Carbon tetrachloride 0.46 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 1 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 1
Chloroform 0.17 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 1
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 1 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 1 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 1 1,4-Dichlorobenzene 0.078 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 1 Dichlorodifluoromethane 2.3 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 1 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 1 1,2-Dichloroethane 0.070 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND J 1 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 1 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 1 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 1 1,1-Difluoroethane 0.44 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 1 Ethylbenzene 0.36 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 1
Naphthalene 0.43 ug/m3 0.20 0.020 EPA-TO-15-SIM ND 1
Tetrachloroethene ND ug/m3 0.10 0.011 EPA-TO-15-SIM ND 1 Toluene 1.9 ug/m3 1.0 0.062 EPA-TO-15-SIM ND 2
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 1 Trichlorofluoromethane 1.2 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 1 1,1,2-Trichloro-1,2,2-trifluoroethane 0.50 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 1 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 1 p- & m-Xylenes 1.0 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 1 o-Xylene 0.38 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1
Total Xylenes 1.4 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 1
4-Bromofluorobenzene (Surrogate) 109 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 109 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 81.3 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 12 of 48 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
Walnut Bluff Work Plan
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416470-02 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB02-24H, 10/10/2024 12:38:00PM, Elizabeth Hwang
1 EPA-TO-15-SIM 10/24/24 10:49 10/24/24 20:18 BEP MS-A2 1 B199628 EPA TO-15 2 EPA-TO-15-SIM 10/24/24 10:49 10/25/24 15:20 BEP MS-A2 10 B199781 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 13 of 48 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
Walnut Bluff Work Plan
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416470-03 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB03-24H, 10/10/2024 12:42:00PM, Elizabeth Hwang

PQL MDL
Benzene 0.70 ug/m3 0.050 0.0032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 1 Carbon tetrachloride 0.48 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 1 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 1
Chloroform 0.17 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 1
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 1 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 1 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 1 1,4-Dichlorobenzene ND ug/m3 0.20 0.016 EPA-TO-15-SIM ND 1 Dichlorodifluoromethane 2.4 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 1 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 1 1,2-Dichloroethane 0.064 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND J 1 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 1 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 1 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 1 1,1-Difluoroethane 0.48 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 1 Ethylbenzene 0.25 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 1
Naphthalene 0.16 ug/m3 0.20 0.020 EPA-TO-15-SIM ND J 1
Tetrachloroethene ND ug/m3 0.10 0.011 EPA-TO-15-SIM ND 1 Toluene 1.2 ug/m3 0.10 0.0062 EPA-TO-15-SIM ND 1
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 1 Trichlorofluoromethane 1.2 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 1 1,1,2-Trichloro-1,2,2-trifluoroethane 0.52 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 1 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 1 p- & m-Xylenes 0.79 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 1 o-Xylene 0.29 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1
Total Xylenes 1.1 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 1
4-Bromofluorobenzene (Surrogate) 112 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 112 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550740 Page 14 of 48 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
Walnut Bluff Work Plan
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416470-03 Client Sample Name: