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Home My WebLink AboutDSHW-2024-004302215 South State Street Suite 500 Salt Lake City, UT 84111 PH 801.853.8185 www.geosyntec.com December 21, 2023 Paige Walton, P.G. Program Manager Division of Waste Management and Radiation Control Utah Department of Environmental Quality 195 North 1950 West Salt Lake City, Utah 84114-4880 Subject: Soil Vapor Probe Installation and Sampling Report NGSC Promontory Facility Dear Ms. Walton, On behalf of Northrop Grumman Systems Corporation (NGSC), formerly ATK Launch Systems, LLC (ATK), a wholly owned subsidiary of Northrop Grumman Corporation (Northrop Grumman), Geosyntec Consultants, Inc. (Geosyntec) has prepared this Soil Vapor Probe Installation and Sampling Report (Report) for the NGSC Facility in Promontory, Utah (Facility or Site). Soil vapor installation and sampling activities were conducted at the Facility in accordance with the Soil Vapor Probe Installation and Sampling Work Plan (Work Plan) approved by the Utah Department of Environmental Quality (UDEQ), Division of Waste Management and Radiation Control (DWMRC) on May 9, 2023. As presented in the Work Plan, the soil gas samples were collected to evaluate vapor intrusion (VI) modeling that has been conducted to support the Groundwater Human Health Risk Assessment (HHRA) for the Site (Geosyntec 2023). The following sections of this letter present a brief summary of the field investigation activities, the soil gas sample analytical results, and an evaluation of the data relative to the previous VI modeling. Field Investigation Activities Soil Vapor Probe Installation The soil vapor probe installation activities were completed from September 11 to 14, 2023. During this period, a total of 10 soil vapor probes were installed at the Site to facilitate the collection soil gas vapor samples. The completed soil vapor probes were installed adjacent to existing onsite DSHW-2024-004302 Paige Walton, P.G. December 21, 2023 Page 2 monitoring wells B-6, E-3, E-4 and G-2 as summarized in Table 1 (attached). The location of the probes is presented in Figure 1. As summarized in the Work Plan, the soil vapor probe locations were selected to provide locations representative of the general hydrogeologic conditions (alluvial and bedrock aquifers) and relative range of groundwater concentrations across the Site, with a focus on areas where shallow groundwater is present (i.e. approximately 100 foot [ft]or less below ground surface [bgs]). All probes were installed using direct push drilling methods (DPT) by Direct Push Services, Inc. of Salt Lake City, Utah under Geosyntec oversight. At each probe location, a 2-inch borehole was advanced. During drilling the deepest boring at each location was continuously logged and representative samples (i.e., to assess changing soil characteristics with depth) were collected for soil physical property analysis (e.g., moisture, grain size distribution, porosity and bulk density). Completed boring logs for each location are included in Attachment A. Physical property soil data is included in Attachment B. All downhole equipment was decontaminated with high pressure washer and potable water between each location. All borings were completed as soil vapor probes in accordance with the methods presented in the Work Plan and Geosyntec's Standard Operating Procedures (SOPs). Each vapor probe was constructed as follows: • Each soil vapor probe consisted of ¼-inch diameter Nylaflow® tubing connected with a compression fitting to a ¼-inch-diameter stainless steel sampling point; • Probes were installed inside the borehole and a sand filter pack was placed in the annulus to a height approximately 6-inches above the top of the stainless-steel sampling point; • Granular bentonite was placed in two lifts of 3-inches above the filter pack and hydrated with a small amount of distilled water after each lift; • A thick slurry of powdered bentonite and water was added to seal the remainder of the borehole annulus to the ground surface; • The top of the probe was fitted with a Luer Lock™ three-way valve to maintain an air-tight seal between installation and sampling; • Soil vapor probes were then completed with a flush mount protective cover; and • The location and surface elevation of each probe was recorded with a handheld GPS unit. Completed soil vapor probe construction logs are included in Attachment C. Type text here Paige Walton, P.G. December 21, 2023 Page 3 Minor modifications to the Work Plan, including proposed soil vapor sample probe depths and the number of total probes, were made in the field to due to drilling refusal prior to reaching the final target depth and/or to place the sampling point in the most permeable soils in each interval based on professional judgement and field observations. These modifications were verbally discussed with the DWMRC while in the field, prior to implementation. A summary of the relevant changes are included in Table 2. Soil Vapor Sampling Soil vapor samples were collected for laboratory analysis from the newly installed soil vapor probes on October 3 and 4, 2023. All samples were collected using laboratory supplied, 1-liter evacuated stainless steel canisters (i.e., summa style canisters) in accordance with the sampling methods and procedures presented in the Work Plan and Geosyntec’s SOPs. Prior to sampling, the following leak checks were performed to ensure that representative samples were obtained: • Summa check; • Vacuum shut-in leak test; • Purging, field screening, and helium shroud leak test; and • Summa canister leak test. All samples were collected at a flow rate of approximately 200 milliliters per min (mL/min) using a laboratory supplied flow controller. A duplicate soil vapor sample was also collected at sampling location SV-03S, which is the closest probe location to Site buildings. The sample time for each sample ranged from approximately 6 to 7 minutes (excluding the location where the duplicate sample was collected and additional sample volume was required). The time for each sample and other pertinent field information (i.e., results of leak checks, etc.) are recorded on the field forms included in Attachment D. Soil Gas Sample Laboratory Analysis & Data Validation All samples were shipped to the Eurofins Air Toxics, LLC (Eurofins) laboratory in Folsom, California, an Utah accredited analytical laboratory, for volatile organic compound (VOC) analysis via United States Environmental Protection Agency (USEPA) Method TO-15 full-list compounds. The laboratory report prepared by Eurofins is included in Attachment E. Upon receipt, the laboratory report analytical data was reviewed and validated by Geosyntec in accordance with USEPA National Functional Guidelines for Organic Superfund Methods Data Review (USEPA 2020). The validation report is included in Attachment F. No significant data quality issues were Paige Walton, P.G. December 21, 2023 Page 4 identified, and the data as qualified were determined to be usable to supporting project objectives. A summary of the validated results are provided in Table 3. Investigation Derived Waste Investigation derived wastes were limited to potable water used for decontamination during drilling. Decontamination water was containerized and discharged to the NGSC wastewater treatment system. Soil wastes were not generated as the soil cores obtained during drilling were collected and submitted for a physical properties testing. Vapor Intrusion Modeling Evaluation The soil vapor data were evaluated to validate and support the VI modeling included in the Groundwater HHRA (Geosyntec 2023). The USEPA implementation of the Johnson and Ettinger (J&E) Model (USEPA 2017) was used to calculate trichloroethene (TCE) soil vapor concentrations as a function of depth for comparison with measured data. TCE was used for modeling, as it generally shows the highest vapor concentrations and is the primary VI risk driver at the Site. The groundwater concentrations and sample depths used for the model validation study provide a location-by location assessment of the soil vapor concentration profile and are different from those used in the Groundwater HHRA which were selected to assess potential risks for different areas of the Site. VI modeling input values are summarized in Table 4 and model spreadsheets are included in Appendix G. Inputs for the VI modeling include: • Groundwater characteristics, • Soil characteristics, and • Building characteristics. The groundwater TCE concentration and groundwater sample depth for the groundwater well nearest to each soil vapor probe were used for the VI model input. It is noted that the well screens for groundwater wells E-4 (adjacent to SV-02), B-6 (adjacent to SV-03) and G-2 (adjacent to SV- 04) were submerged by depths of approximately 15, 6, and 28 feet, respectively. This is consistent with Site wells as the data included in the HHRA frequently includes results for groundwater sampling collected from wells screened below the water table (particularly for wells within plume areas 3A, 3B, 4A, 4B, and 4 Off-Site). Because the groundwater concentrations used in the VI modeling for SV-02/E-4, SV-03/B-6, and SV-04/G-2 were from submerged wells, the VI modeling is expected to over-estimate soil vapor concentrations in equilibrium with groundwater and the Paige Walton, P.G. December 21, 2023 Page 5 resulting predicted soil vapor concentration profile due to the fact that VOC groundwater concentrations are likely lower near the groundwater vadose zone interface in comparison to deeper below the water table. Boring logs for the soil vapor probes and proximal groundwater wells were reviewed to select the lithological layers included in the VI model. The USEPA J&E Model spreadsheet allows for up to three lithological layers for the VI model input, so simplification of the layers is necessary (i.e., some fine-grained layers that would reduce the vapor flux were not included in the model validation). Soil grain size analytical results from samples collected during the soil vapor probe installation were also used to support the classification of the soil layers used as model inputs. Soil properties (e.g., porosity, moisture content, and bulk density) for the different soil classifications were taken from the lookup tables included in the USEPA J&E Model spreadsheet. Additionally, soil lithological characteristics used in the Groundwater HHRA were used to assess the sensitivity of these parameters to the predicted soil vapor concentration profiles. The HHRA J&E model soil layers for plume area 4B (Well G-4) were used for SV-01 and SV-02 and soil layers for plume area 4 Off-site (Well H-6) were used for SV-03 and SV-04, The soil lithologies used for the modeling are included in Appendix H. Default building parameters for the residential exposure scenario included in the USEPA J&E Model spreadsheet were used in the modeling analysis. The soil vapor concentration profiles are not sensitive to selected building parameter model inputs, so these factors are not key factors for the VI model validation. Comparisons of modeled and measured soil vapor concentrations are shown in Figures 2A to 2D. These figures show that the modeled soil vapor concentrations are consistently higher (more conservative) than the actual measured values at all locations.The measured soil vapor concentrations for SV-01 are very similar to the Site modeling assessment using the input for groundwater well E-3 (Figure 2A), indicating the VI model provides a reasonable assessment of vapor transport in soil. As discussed above, the water table elevation is within the screen interval for groundwater well E-3. As shown in Figures 2B to 2D, comparison of the measured and modeled soil vapor concentrations for the locations with submerged well screens (groundwater wells E-4, B-6, and G-2), show the predicted concentrations based on the modeled calculations are well above the measured concentrations. The submerged well screens for these locations are likely the primary cause of this model overestimation. At SV-04/G-2, the water level was 28 feet above the well screen (the greatest difference for the locations evaluated) and the VI modeling at this location showed greatest level of overestimation (Figure 2D). It is noted that this overestimation of the Paige Walton, P.G. December 21, 2023 Page 6 modeled soil vapor concentrations would result in a conservative estimate of the risk at these locations. Conclusion Comparison of the soil vapor samples collected during this evaluation to values modeled for the Site using the USEPA J&E Model indicates that the model provides conservative (higher) estimates of vapor migration through soil. Therefore, the vapor intrusion modeling that was conducted to support the Groundwater HHRA results in conservative risk estimates. If you have any questions or would like additional information, please contact us at 801-618- 0483. Additionally, Mr. Tim Jimenez of NGSC can be reached at 801-251-2142. Sincerely, Brian Smith, PG (UT) Senior Geologist Brent C. Robinson, PE (UT) Senior Principal Figures: Figure 1 – Soil Vapor Probe Locations Figure 2A – SV-01/E-3 Soil Gas Concentration Versus Depth Figure 2B – SV-02/E-4 Soil Gas Concentration Versus Depth Figure 2C – SV-03/B-6 Soil Gas Concentration Versus Depth Figure 2D – SV-04/G2 Soil Gas Concentration Versus Depth Tables: Table 1 – Summary of Completed Soil Vapor Sample Locations Table 2 – Summary of Vapor Probe Field Modifications Table 3 – Soil Gas Sample Analytical Summary Table 4 – Summary of J&E Model Input Parameters Attachments: Attachment A – Boring Logs Attachment B – Physical Soil Property Test Results Attachment C – Soil Vapor Probe Construction Logs Attachment D – Soil Vapor Sample Collection Forms Attachment E – Laboratory Analytical Report Attachment F – Data Validation Report Paige Walton, P.G. December 21, 2023 Page 7 Attachment G - J&E Model Spreadsheets Attachment H – Lithology Comparison References: Geosyntec. 2023. Human Health Risk Assessment for Groundwater at the Northrop Grumman/ATK Launch Systems, LLC, Promontory Facility, Promontory, Utah. USEPA. 2020. USEPA Contract Laboratory Program, National Functional Guidelines for Organic Superfund Methods Data Review. USEPA. 2017. Documentation for EPA’s Implementation of the Johnson and Ettinger Model to Evaluation Site Specific Vapor Intrusion into Buildings. Revised September Copies: Kris Blauer (NGSC) Tim Jimenez (NGSC) Blair Palmer (NGSC) Robert Ettinger (Geosyntec) FIGURES 0 500 Feet o Notes: 1.See Table 1 for soil vapor sample intervals Figure Salt Lake City, UT December 2023 Co-Located Soil Vapor Sample Locations ATK Launch SystemsPromontory, UT 1 Monitoring Wells (Approximate Locations)!A Soil Vapor Sample Locations Legend !A !A !A !A E-4 E-3 B-6 G-2 SV-02 SV-01 SV-03 SV-04 DE0188D-01 December 2023 2A Figure Soil Vapor Concentration Profile SV-01 / E-3 ATK Launch Systems Promontory, Utah 0 20 40 60 80 100 120 1.00E+00 1.00E+01 1.00E+02 1.00E+03 1.00E+04 De p t h (f t ) Concentration (ug/m3) SV‐01 / E‐3 HHRA Inputs Site Modeling Measurements Legend: DE0188D-01 December 2023 Soil Vapor Concentration Profile SV-02 / E-4 ATK Launch Systems Promontory, Utah Figure 2B 0 10 20 30 40 50 60 70 80 90 100 1.00E+00 1.00E+01 1.00E+02 1.00E+03 1.00E+04 1.00E+05 De p t h (f t ) Concentration (ug/m3) SV‐02 / E‐4 HHRA Inputs Site Modeling Measurements Legend: DE0188D-01 December 2023 Soil Vapor Concentration Profile SV-03 / B-6 ATK Launch Systems Promontory, Utah Figure 2C 0 20 40 60 80 100 120 1.00E+00 1.00E+01 1.00E+02 1.00E+03 1.00E+04 1.00E+05 1.00E+06 De p t h (f t ) Concentration (ug/m3) SV‐03 / B‐6 HHRA Inputs Site Modeling Measurements Legend: DE0188D-01 December 2023 Soil Vapor Concentration Profile SV-04 / G-2 ATK Launch Systems Promontory, Utah Figure 2D 0 10 20 30 40 50 60 70 1.00E+00 1.00E+01 1.00E+02 1.00E+03 1.00E+04 1.00E+05 1.00E+06 De p t h (f t ) Concentration (ug/m3) SV‐04 / G‐2 HHRA Inputs Site Modeling Measurements Legend: TABLES Table 1 Summary of Soil Vapor Sample Locations ATK Launch Systems Promontory, Utah Location ID Monitoring Well Sample Identification Soil Vapor Probe Depth Lithology Water (ft bgs)Alluvial or Bedrock Aquifer Concentration SV-01S 13.5 - 14 Silty Gravel with Sand SV-01D 26.5 - 27 Gravelly Silt SV-02S 14.5 - 15 Sandy Silty with Gravel SV-02M 26.5 -27 Poorly Graded Sand with Gravel SV-02D 37 -37.5 Poorly Graded Sand with Gravel SV-03S 11.5 - 12 Gravelly Silt SV-03M 26.5 -27 Silty Sand SV-04S 14.5 - 15 Gravelly Silt with Sand SV-04M 25.5 - 26 Clayey Sand SV-04D 33 - 33.5 Clayey Sand Notes: ft bgs = feet below ground surface Approximate water level based on measured water level in adjacent well during 2022 groundwater monitoring event. *saturated soils observed at approximately 35 feet during installation of soil vapor probes at locaiton SV-04 Low Low High High SV-01 SV-02 SV-03 SV-04 E-3 E-4 B-6 G-2 108.78 94.53 99.01 57.7* Bedrock (Bedrock Present at Approximately 28 ft bgs) Alluvial Alluvial Alluvial 1 of 1 Geosyntec Consultants Table 2 Summary of Vapor Probe Field Modifications ATK Launch Systems Promontory, Utah Soil Vapor Probe Location Completed Vapor Probe Depth (ft bgs) Approximate Proposed Vapor Probe Depth (ft bgs) Rationale for Change SV-01S 13.5 - 14 15 Adjusted slightly based on lithology change at approximately 15 feet from silty gravel with sand to gravelly silt SV-01D 26.5 - 27 25 Adjusted slightly to place probe just above bedrock/refusal at 27 feet SV-02S 14.5 - 15 15 No change SV-02M 26.5 -27 30 SV-02D 37 -37.5 65 SV-03S 11.5 - 12 15 Adjusted slightly to target most permeable zone within gravelly silt from 0-15 feet. SV-03M 26.5 -27 30 Adjusted slightly to target most permeable zone within the silty sand from 26 to 30 feet. SV-03D Not Completed 55 Not completed due to refusal at approximately 30 feet SV-04S 14.5 - 15 15 No change SV-04M 25.5 - 26 30 SV-04D 33 - 33.5 55 Notes: ft bgs = feet below ground surface SV-04M and SV-04D adjusted based on saturated conditions observed at approximately 35 feet SV-02M and SV-02D adjusted based on refusal at approximately 42 feet. Probes adjusted to target most permeable zones within sandy gravel from 26 to 40 feet 1 of 1 Geosyntec Consultants Table 3 Soil Gas Sample Analytical Summary ATK Launch Systems Promontory, Utah Soil Vapor Probe Location Adjacent Well Groundwater Depth (ft BGS) TCE Concentration in Groundwater (μg/L) Vapor Probe Depth (ft bgs) Soil Vapor Sample Identifcation Soil Vapor Sample Date Ac e t o n e Ca r b o n D i s u l f i d e Ch l o r o f o r m 1, 1 - D i c h l o r o e t h a n e 1, 1 - D i c h l o r o e t h e n e ci s - 1 , 2 - D i c h l o r o e t h e n e Et h a n o l Et h y l B e n z e n e 4- E t h y l t o l u e n e Fr e o n 1 1 Te t r a c h l o r o e t h e n e To l u e n e 1, 1 , 1 - T r i c h l o r o e t h a n e Tr i c h l o r o e t h e n e 1, 2 , 4 - T r i m e t h y l b e n z e n e m, p - X y l e n e o- X y l e n e SV-01S 13.5 - 14 SV-01S-10032023 10/3/2023 28 U 14 U 8.7 U 4.7 4.6 U 4.6 U 22 U 5.1 U 5.8 U 6.6 U 7.9 U 8.8 U 6.4 U 69 5.8 U 10 U 5.1 U SV-01D 26.5 - 27 SV-01D-10032023 10/3/2023 28 U 15 U 12 4.8 U 11 4.7 U 22 U 5.1 U 5.8 U 6.6 U 8.0 8.9 U 6.4 U 120 5.8 U 10 U 5.1 U SV-02S 14.5 - 15 SV-02S-10042023 10/4/2023 28 U 17 13 4.8 U 40 4.8 U 23 U 5.4 14 6.7 U 8.1 U 9.4 6.5 U 69 16 22 8.4 SV-02M 26.5 -27 SV-02M-10042023 10/4/2023 26 U 14 U 19 4.4 U 120 4.3 U 21 U 4.8 U 6.4 8.6 10 8.2 U 6.0 160 11 9.5 U 4.8 U SV-02D 37 -37.5 SV-02D-10042023 10/4/2023 27 U 14 U 25 4.5 U 170 4.4 U 21 U 4.9 U 10 10 7.6 U 8.2 J 8.2 270 15 19 6.6 SV-03S 11.5 - 12 SV-03S-10032023 10/3/2023 51 UJ 27 U 55 12 580 15 40 U 9.3 U 11 U 12 U 15 U 16 U 120 3000 11 U 19 U 9.5 U SV-03S 11.5 - 12 SV-03S-10032023-DUP* 10/3/2023 56 J 27 U 56 12 600 16 49 J 9.5 U 11 U 12 U 15 U 16 U 130 3000 < 11 19 U 9.5 U SV-03M 26.5 -27 SV-03M-10032023 10/3/2023 140 U 71 U 82 42 2000 75 110 U 25 U 28 U 32 U 39 U 43 U 290 8200 28 < 50 25 U SV-04S 14.5 - 15 SV-04S-10042023 10/4/2023 27 U 14 U 5.6 U 4.6 U 4.5 U 4.5 U 22 U 5.0 U 5.6 U 6.4 U 7.8 U 8.6 U 6.2 U 6.2 U 5.6 U 9.9 U 5.0 U SV-04M 25.5 - 26 SV-04M-10042023 10/4/2023 33 14 U 5.7 U 4.7 U 4.6 U 4.6 U 22 U 5.1 U 5.8 U 6.6 U 7.9 U 8.8 U 6.4 U 12 6.3 10 U 5.1 U SV-04D 33 - 33.5 SV-04D-10042023 10/4/2023 54 16 U 6.2 U 5.1 U 5.0 U 5.0 U 24 U 6.0 6.2 U 7.1 U 8.5 U 12 6.9 U 18 6.2 U 18 9.7 Notes: Detected values shown in bold U = Analyte was not detected above the reporting limit at the value shown J = estimated concentration * = Sample SV-03S-10032023-DUP was collected as a duplicate sample from location SV-03S bgs = Below Ground Surface E-3 108.78 E-4 94.53 B-6 99.01 G-2 57.70 34.7 69.9 1920 1300 1 of 1 Geosyntec Consultants Table 4 Johnson and Ettinger Model Input Data ATK Launch Systems Promontory, Utah HHRA Site Model HHRA Site Model HHRA Site Model HHRA Site Model Depth to Water ft bgs 108.8 108.8 94.5 94.5 99 99 57.7 57.7 Groundwater concentration µg/L 34.7 34.7 69.9 69.9 1920 1920 1300 1300 Groundwater temperature °C 13 13 13 13 13 13 13 13 Foundation type N/A Slab-on-grade Slab-on-grade Slab-on-grade Slab-on-grade Slab-on-grade Slab-on-grade Slab-on-grade Slab-on-grade Qsoil/Qbuilding -0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 Indoor air exchange rate 1/hr 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45 Building area ft²1,615 1,615 1,615 1,615 1,615 1,615 1,615 1,615 Building height ft 8 8 8 8 8 8 8 8 Stratum A soil type N/A Silty Clay Loamy Sand Silty Clay Silt Loam Sandy Clay Silt Loam Sandy Clay Silt Loam Stratum A thickness ft 20 15 20 15 5 17.5 5 15 Stratum B soil type N/A Clay Silt Loam Clay Clay Silty Clay Silty Clay Silty Clay Sandy Loam Stratum B thickness ft 40 13 40 10 20 7.5 20 20 Stratum C soil type N/A Silty Clay Silty Clay Silty Clay Loam Silty Clay Silt Loam Silty Clay Silty Clay Loam Stratum C thickness ft 48.8 80.8 34.5 69.5 74 74 32.7 22.7 Notes: ft bgs: feet below ground surface µg/L: microgram per liter °C: degrees celsius N/A: not applicable Input Variable SV-04 / G-2SV-03 / B-6SV-02 / E-4SV-01 / E-3 Units 1 of 1 Geosyntec Consultants ATTACHMENT A BORING LOGS 4360.00 4348.00 15.00 27.00 SILTY GRAVEL WITH SAND, (GM) Gravel with some sand and silt, light brown, no odor, dry GRAVELLY SILT, (ML) Silt with sand and trace gravel, light to medium brown, non plastic, trace clay at 23 feet,no odor, moist. Refusal at 27.00 ft. COMPLETED 9/14/23 CHECKED BYLOGGED BY J. Welch DRILLING CONTRACTOR Direct Push Services DRILLING METHOD Direct Push NOTES AT TIME OF DRILLING --- AT END OF DRILLING --- AFTER DRILLING --- HOLE SIZE 2 inch DE P T H (f t ) 5 10 15 20 25 BORING NUMBER SV-01 PAGE 1 OF 1 CLIENT ATK Launch Systems PROJECT NUMBER DE0188D DATE STARTED 9/14/23 PROJECT NAME ATK Promontory PROJECT LOCATION Promontory, Utah GROUND ELEVATION 4375 ft GROUND WATER LEVELS: GE N E R A L B H / T P / W E L L S V - 0 1 . G P J G I N T S T D A 4 . G D T 9 / 2 7 / 2 3 U. S . C . S . GR A P H I C LO G MATERIAL DESCRIPTION S A M P L E IN T E R V A L 0 - 1 5 f t GM 15 - 2 7 f t ML 4345.00 4335.00 4320.00 4318.00 15.00 25.00 40.00 42.00 SANDY SILT WITH GRAVEL, (ML) Sandy silt with gravel and trace clay, brown, dry, no odor, non-plastic LEAN CLAY, (CL) Lean clay with trace to few sand and gravel, brown, moist, no odor POORLY SORTED SAND WITH GRAVEL, (SP) Poorly sorted sand with few to little silt and gravel, light brown to tan, dry to moist, no odor, inceasing from fines from 38 to 40 feet LEAN CLAY, (CL) Sandy lean clay with trace gravel, brown, low plastic, no odor, moist Refusal at 42.00 feet. COMPLETED 9/12/23 CHECKED BYLOGGED BY J. Welch NOTES AT TIME OF DRILLING --- AT END OF DRILLING --- AFTER DRILLING --- HOLE SIZE 2 inch DE P T H (ft ) 5 10 15 20 25 30 35 40 BORING NUMBER SV-02 PAGE 1 OF 1 PROJECT NAME ATK Promontory PROJECT LOCATION Promontory, Utah GROUND ELEVATION 4360 ft GROUND WATER LEVELS: GE N E R A L B H / T P / W E L L S V - 0 1 . G P J G I N T S T D A 4 . G D T 9 / 2 7 / 2 3 U. S . C . S . GR A P H I C LO G MATERIAL DESCRIPTION SA M P L E IN T E R V A L 0 - 1 5 f t ML 15 - 2 5 f t CL 25 - 4 0 f t SP DRILLING CONTRACTOR Direct Push Services DRILLING METHOD Direct Push CLIENT ATK Launch Systems PROJECT NUMBER DE0188D DATE STARTED 9/12/23 4355.00 4345.00 4338.00 15.00 25.00 32.00 GRAVELLY SILT, (ML) Silt with gravel and trace sand, brown, low plasticity, dry to moist, no odor, increasing fines from 12 to 15 ft LEAN CLAY, (CL) Lean clay, brown, medium plasticity, moist, no odor SILTY SAND, (SM) Silty Sand with few gravel and clay, brown, poorly sorted, moist, no odor, increasing clay at27 feet Refusal at 32.00 feet. COMPLETED 9/11/23 CHECKED BYLOGGED BY J. Welch NOTES AT TIME OF DRILLING --- AT END OF DRILLING --- AFTER DRILLING --- HOLE SIZE 2 inch DE P T H (f t ) 5 10 15 20 25 30 BORING NUMBER SV-03 PAGE 1 OF 1 PROJECT NAME ATK Promontory PROJECT LOCATION Promontory, Utah GROUND ELEVATION 4370 ft GROUND WATER LEVELS: GE N E R A L B H / T P / W E L L S V - 0 1 . G P J G I N T S T D A 4 . G D T 9 / 2 7 / 2 3 U. S . C . S . GR A P H I C LO G MATERIAL DESCRIPTION S A M P L E IN T E R V A L 0 - 1 5 f t ML 15 - 2 5 f t CL 25 - 3 2 f t SM DRILLING CONTRACTOR Direct Push Services DRILLING METHOD Direct Push CLIENT ATK Launch Systems PROJECT NUMBER DE0188D DATE STARTED 9/11/23 4315.00 4305.00 4290.00 4285.00 10.00 20.00 35.00 40.00 LEAN CLAY WITH SAND, (CL) Silty clay with trace fine sand and and gravel, light brown, no odor, non to lowplasticity, dry to moist, increasing clay with depth GRAVELLY SILT WITH SAND, (ML) Gravely silt with sand and trace clay, gray to light brown, dry to moist, noodor, shell fragements from 10-15 feet CLAYEY SAND, (SC) Clayey sand, light brown, moist, becoming wet at approximately 35 feet, no odor FAT CLAY, (CH) Bottom of borehole at 40.00 feet. COMPLETED 9/13/23 CHECKED BYLOGGED BY J. Welch NOTES AT TIME OF DRILLING --- AT END OF DRILLING --- AFTER DRILLING --- HOLE SIZE 2 inch DE P T H (ft ) 5 10 15 20 25 30 35 40 SA M P L E IN T E R V A L BORING NUMBER SV-04 PAGE 1 OF 1 PROJECT NAME ATK Promontory PROJECT LOCATION Promontory, Utah GROUND ELEVATION 4325 ft GROUND WATER LEVELS: GE N E R A L B H / T P / W E L L S V - 0 1 . G P J G I N T S T D A 4 . G D T 9 / 2 7 / 2 3 U. S . C . S . GR A P H I C LO G MATERIAL DESCRIPTION 0 - 1 0 f t CL 10 - 2 0 f t 20 - 3 5 f t ML SC DRILLING CONTRACTOR Direct Push Services DRILLING METHOD Direct Push CLIENT ATK Launch Systems PROJECT NUMBER DE0188D DATE STARTED 9/13/23 ATTACHMENT B PHYSICAL SOIL PROPERTY TEST RESULTS Copyright GeoStrata, 2023 Moisture Content Report Geosyntec Northrup Grumman ATK Launch System Project Number: 1652-005 Boring No.Sample Depth (feet) Natural Moisture Content (%) SV-1 0-15 3.2 SV-1 15-27 10.2 SV-2 0-15 9.2 SV-2 15-25 17.3 SV-2 25-40 6.7 SV-3 0-15 6.7 SV-3 15-20 18.2 SV-3 25-32 13.4 SV-4 0-10 13.1 SV-4 10-20 5.6 SV-4 20-35 18.7 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-1 @ 0-15 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.025 9.7 2 23.0 0.01317 16.7 0.0290 1.020 11.0 5 23.0 0.01317 13.0 0.0195 1.017 11.9 15 23.0 0.01317 10.4 0.0117 1.0145 12.5 30 23.0 0.01317 8.9 0.0085 1.013 12.9 60 23.0 0.01317 7.8 0.0061 1.010 13.7 250 23.0 0.01317 5.6 0.0031 1.008 14.2 1440 23.0 0.01317 4.1 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 88.8 1/2"12.5 80.1 3/8"9.5 72.1 No. 4 4.8 58.1 No. 8 2.4 48.0 No. 10 2.0 46.2 No. 16 1.2 40.3 No. 30 0.6000 34.8 No. 40 0.4250 33.0 No. 50 0.3000 31.2 No. 100 0.1500 28.1 No. 200 0.0750 22.2 -0.0290 7.7 -0.0195 6.0 -0.0117 4.8 -0.0085 4.1 -0.0061 3.6 -0.0031 2.6 -0.0013 1.9 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-1 @ 15-27 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.028 8.9 2 25.3 0.01286 40.5 0.0271 1.023 10.2 5 25.3 0.01286 32.6 0.0184 1.020 11.0 15 25.3 0.01286 27.8 0.0110 1.018 11.5 30 25.3 0.01286 24.6 0.0080 1.017 11.8 60 25.3 0.01286 23.0 0.0057 1.012 13.1 250 25.8 0.01272 15.1 0.0029 1.010 13.7 1440 24.1 0.01301 11.9 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 100.0 3/8"9.5 100.0 No. 4 4.8 99.1 No. 8 2.4 98.7 No. 10 2.0 98.7 No. 16 1.2 98.5 No. 30 0.6000 98.0 No. 40 0.4250 97.7 No. 50 0.3000 97.4 No. 100 0.1500 95.9 No. 200 0.0750 74.7 -0.0271 40.0 -0.0184 32.1 -0.0110 27.4 -0.0080 24.3 -0.0057 22.7 -0.0029 14.9 -0.0013 11.8 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-2 @ 0-15 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.023 10.2 2 22.8 0.01317 29.9 0.0297 1.021 10.7 5 22.8 0.01317 27.0 0.0193 1.015 12.3 15 22.8 0.01317 18.2 0.0119 1.014 12.6 30 22.8 0.01317 16.8 0.0085 1.013 12.9 60 22.8 0.01317 15.3 0.0061 1.011 13.4 250 22.8 0.01317 12.4 0.0030 1.009 13.9 1440 22.8 0.01317 9.5 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 95.5 1/2"12.5 95.5 3/8"9.5 94.7 No. 4 4.8 92.7 No. 8 2.4 91.0 No. 10 2.0 90.8 No. 16 1.2 89.8 No. 30 0.6000 88.4 No. 40 0.4250 87.5 No. 50 0.3000 86.4 No. 100 0.1500 82.7 No. 200 0.0750 69.3 -0.0297 27.2 -0.0193 24.5 -0.0119 16.6 -0.0085 15.2 -0.0061 13.9 -0.0030 11.3 -0.0013 8.6 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-2 @ 15-25 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.044 4.6 2 22.8 0.01317 59.2 0.0200 1.043 4.9 5 22.8 0.01317 57.7 0.0130 1.038 6.3 15 22.8 0.01317 49.9 0.0086 1.035 7.0 30 22.8 0.01317 46.3 0.0064 1.032 7.9 60 22.8 0.01317 41.3 0.0048 1.026 9.4 250 22.8 0.01317 33.5 0.0026 1.009 14.1 1440 22.8 0.01317 8.6 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 93.8 1/2"12.5 93.8 3/8"9.5 93.5 No. 4 4.8 91.5 No. 8 2.4 89.1 No. 10 2.0 88.6 No. 16 1.2 87.1 No. 30 0.6000 85.0 No. 40 0.4250 84.0 No. 50 0.3000 82.8 No. 100 0.1500 79.7 No. 200 0.0750 73.9 -0.0200 52.4 -0.0130 51.2 -0.0086 44.2 -0.0064 41.1 -0.0048 36.6 -0.0026 29.7 -0.0013 7.6 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-2 @25-40 Material: Sample #: Date: 100.1 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.027 9.1 2 25.4 0.01286 29.4 0.0275 1.025 9.7 5 25.4 0.01286 27.0 0.0179 1.022 10.5 15 25.4 0.01286 23.4 0.0107 1.02 11.0 30 25.4 0.01286 21.0 0.0078 1.018 11.5 60 25.4 0.01286 18.6 0.0056 1.014 12.6 250 25.8 0.01272 13.8 0.0029 1.011 13.4 1440 24.1 0.01301 10.2 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 92.8 3/8"9.5 89.9 No. 4 4.8 81.3 No. 8 2.4 76.0 No. 10 2.0 74.7 No. 16 1.2 71.4 No. 30 0.6000 67.8 No. 40 0.4250 66.4 No. 50 0.3000 64.4 No. 100 0.1500 60.3 No. 200 0.0750 54.2 -0.0275 22.0 -0.0179 20.2 -0.0107 17.5 -0.0078 15.7 -0.0056 13.9 -0.0029 10.3 -0.0013 7.6 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-3 @ 0-15 Material: Sample #: Date: 100.4 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.035 7.1 2 23.1 0.01317 48.2 0.0249 1.034 7.4 5 23.1 0.01317 46.7 0.0160 1.027 9.3 15 23.1 0.01317 36.2 0.0104 1.0235 10.1 30 23.1 0.01317 31.6 0.0076 1.021 10.7 60 23.1 0.01317 27.9 0.0056 1.015 12.3 250 23.1 0.01317 18.8 0.0029 1.010 13.7 1440 23.1 0.01317 11.3 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 98.0 3/8"9.5 96.2 No. 4 4.8 95.1 No. 8 2.4 94.2 No. 10 2.0 94.0 No. 16 1.2 93.5 No. 30 0.6000 92.6 No. 40 0.4250 91.9 No. 50 0.3000 90.9 No. 100 0.1500 87.6 No. 200 0.0750 81.2 -0.0249 45.3 -0.0160 43.9 -0.0104 34.0 -0.0076 29.7 -0.0056 26.2 -0.0029 17.7 -0.0013 10.6 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-3 @ 15-20 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.044 4.6 2 22.8 0.01317 64.5 0.0200 1.043 4.9 5 22.8 0.01317 62.9 0.0130 1.042 5.1 15 22.8 0.01317 61.4 0.0077 1.0395 5.8 30 22.8 0.01317 57.5 0.0058 1.037 6.6 60 22.8 0.01317 52.8 0.0044 1.030 8.5 250 22.8 0.01317 41.9 0.0024 1.022 10.5 1440 22.8 0.01317 30.3 0.0011 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 97.5 3/8"9.5 97.5 No. 4 4.8 96.7 No. 8 2.4 96.7 No. 10 2.0 96.6 No. 16 1.2 96.4 No. 30 0.6000 96.2 No. 40 0.4250 96.2 No. 50 0.3000 96.0 No. 100 0.1500 95.8 No. 200 0.0750 95.1 -0.0200 62.3 -0.0130 60.8 -0.0077 59.3 -0.0058 55.5 -0.0044 51.0 -0.0024 40.5 -0.0011 29.3 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-3 @ 25-32 Material: Sample #: Date: 100.6 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.042 5.1 2 23.0 0.01317 53.8 0.0211 1.040 5.7 5 23.0 0.01317 51.1 0.0140 1.034 7.3 15 23.0 0.01317 42.9 0.0092 1.032 7.8 30 23.0 0.01317 40.2 0.0067 1.030 8.5 60 23.0 0.01317 36.8 0.0049 1.023 10.3 250 23.0 0.01317 27.2 0.0027 1.017 11.9 1440 23.0 0.01317 19.1 0.0012 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 91.7 3/8"9.5 89.8 No. 4 4.8 87.3 No. 8 2.4 85.6 No. 10 2.0 85.2 No. 16 1.2 84.1 No. 30 0.6000 82.5 No. 40 0.4250 81.5 No. 50 0.3000 80.3 No. 100 0.1500 77.5 No. 200 0.0750 72.1 -0.0211 45.8 -0.0140 43.5 -0.0092 36.6 -0.0067 34.2 -0.0049 31.3 -0.0027 23.2 -0.0012 16.2 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-4 @ 0-10 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.037 6.5 2 22.8 0.01317 55.4 0.0237 1.037 6.6 5 22.8 0.01317 54.6 0.0151 1.027 9.3 15 22.8 0.01317 38.5 0.0104 1.023 10.2 30 22.8 0.01317 32.9 0.0077 1.020 11.0 60 22.8 0.01317 28.1 0.0056 1.016 12.2 250 22.8 0.01317 20.9 0.0029 1.012 13.1 1440 22.8 0.01317 15.3 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 100.0 3/8"9.5 100.0 No. 4 4.8 100.0 No. 8 2.4 99.9 No. 10 2.0 99.8 No. 16 1.2 99.7 No. 30 0.6000 99.2 No. 40 0.4250 98.7 No. 50 0.3000 97.8 No. 100 0.1500 94.6 No. 200 0.0750 79.9 -0.0237 55.3 -0.0151 54.5 -0.0104 38.5 -0.0077 32.9 -0.0056 28.1 -0.0029 20.8 -0.0013 15.2 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-4 @ 10-20 Material: Sample #: Date: 100.6 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.027 9.1 2 25.5 0.01272 22.2 0.0272 1.024 9.9 5 25.5 0.01272 19.5 0.0179 1.022 10.5 15 25.5 0.01272 17.7 0.0106 1.02 11.0 30 25.5 0.01272 15.9 0.0077 1.018 11.5 60 25.5 0.01272 14.1 0.0056 1.013 12.9 250 25.8 0.01272 9.5 0.0029 1.011 13.4 1440 24.1 0.01301 7.7 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 85.3 3/8"9.5 79.5 No. 4 4.8 65.2 No. 8 2.4 57.8 No. 10 2.0 56.7 No. 16 1.2 54.2 No. 30 0.6000 52.2 No. 40 0.4250 51.4 No. 50 0.3000 50.6 No. 100 0.1500 47.8 No. 200 0.0750 43.2 -0.0272 12.6 -0.0179 11.1 -0.0106 10.0 -0.0077 9.0 -0.0056 8.0 -0.0029 5.4 -0.0013 4.4 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-4 @ 20-35 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.031 8.1 2 23.0 0.01317 45.8 0.0265 1.026 9.4 5 23.0 0.01317 37.7 0.0181 1.022 10.6 15 23.0 0.01317 30.5 0.0111 1.019 11.3 30 23.0 0.01317 26.5 0.0081 1.017 11.8 60 23.0 0.01317 23.3 0.0058 1.014 12.7 250 23.0 0.01317 17.7 0.0030 1.010 13.7 1440 23.0 0.01317 12.0 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 100.0 3/8"9.5 100.0 No. 4 4.8 100.0 No. 8 2.4 99.8 No. 10 2.0 99.8 No. 16 1.2 99.7 No. 30 0.6000 99.6 No. 40 0.4250 99.4 No. 50 0.3000 98.7 No. 100 0.1500 94.0 No. 200 0.0750 79.3 -0.0265 45.7 -0.0181 37.7 -0.0111 30.5 -0.0081 26.5 -0.0058 23.2 -0.0030 17.6 -0.0013 12.0 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-1 @ 0-15 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.025 9.7 2 23.0 0.01317 16.7 0.0290 1.020 11.0 5 23.0 0.01317 13.0 0.0195 1.017 11.9 15 23.0 0.01317 10.4 0.0117 1.0145 12.5 30 23.0 0.01317 8.9 0.0085 1.013 12.9 60 23.0 0.01317 7.8 0.0061 1.010 13.7 250 23.0 0.01317 5.6 0.0031 1.008 14.2 1440 23.0 0.01317 4.1 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 88.8 1/2"12.5 80.1 3/8"9.5 72.1 No. 4 4.8 58.1 No. 8 2.4 48.0 No. 10 2.0 46.2 No. 16 1.2 40.3 No. 30 0.6000 34.8 No. 40 0.4250 33.0 No. 50 0.3000 31.2 No. 100 0.1500 28.1 No. 200 0.0750 22.2 -0.0290 7.7 -0.0195 6.0 -0.0117 4.8 -0.0085 4.1 -0.0061 3.6 -0.0031 2.6 -0.0013 1.9 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-1 @ 15-27 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.028 8.9 2 25.3 0.01286 40.5 0.0271 1.023 10.2 5 25.3 0.01286 32.6 0.0184 1.020 11.0 15 25.3 0.01286 27.8 0.0110 1.018 11.5 30 25.3 0.01286 24.6 0.0080 1.017 11.8 60 25.3 0.01286 23.0 0.0057 1.012 13.1 250 25.8 0.01272 15.1 0.0029 1.010 13.7 1440 24.1 0.01301 11.9 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 100.0 3/8"9.5 100.0 No. 4 4.8 99.1 No. 8 2.4 98.7 No. 10 2.0 98.7 No. 16 1.2 98.5 No. 30 0.6000 98.0 No. 40 0.4250 97.7 No. 50 0.3000 97.4 No. 100 0.1500 95.9 No. 200 0.0750 74.7 -0.0271 40.0 -0.0184 32.1 -0.0110 27.4 -0.0080 24.3 -0.0057 22.7 -0.0029 14.9 -0.0013 11.8 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-2 @ 0-15 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.023 10.2 2 22.8 0.01317 29.9 0.0297 1.021 10.7 5 22.8 0.01317 27.0 0.0193 1.015 12.3 15 22.8 0.01317 18.2 0.0119 1.014 12.6 30 22.8 0.01317 16.8 0.0085 1.013 12.9 60 22.8 0.01317 15.3 0.0061 1.011 13.4 250 22.8 0.01317 12.4 0.0030 1.009 13.9 1440 22.8 0.01317 9.5 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 95.5 1/2"12.5 95.5 3/8"9.5 94.7 No. 4 4.8 92.7 No. 8 2.4 91.0 No. 10 2.0 90.8 No. 16 1.2 89.8 No. 30 0.6000 88.4 No. 40 0.4250 87.5 No. 50 0.3000 86.4 No. 100 0.1500 82.7 No. 200 0.0750 69.3 -0.0297 27.2 -0.0193 24.5 -0.0119 16.6 -0.0085 15.2 -0.0061 13.9 -0.0030 11.3 -0.0013 8.6 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-2 @ 15-25 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.044 4.6 2 22.8 0.01317 59.2 0.0200 1.043 4.9 5 22.8 0.01317 57.7 0.0130 1.038 6.3 15 22.8 0.01317 49.9 0.0086 1.035 7.0 30 22.8 0.01317 46.3 0.0064 1.032 7.9 60 22.8 0.01317 41.3 0.0048 1.026 9.4 250 22.8 0.01317 33.5 0.0026 1.009 14.1 1440 22.8 0.01317 8.6 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 93.8 1/2"12.5 93.8 3/8"9.5 93.5 No. 4 4.8 91.5 No. 8 2.4 89.1 No. 10 2.0 88.6 No. 16 1.2 87.1 No. 30 0.6000 85.0 No. 40 0.4250 84.0 No. 50 0.3000 82.8 No. 100 0.1500 79.7 No. 200 0.0750 73.9 -0.0200 52.4 -0.0130 51.2 -0.0086 44.2 -0.0064 41.1 -0.0048 36.6 -0.0026 29.7 -0.0013 7.6 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-3 @ 0-15 Material: Sample #: Date: 100.4 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.035 7.1 2 23.1 0.01317 48.2 0.0249 1.034 7.4 5 23.1 0.01317 46.7 0.0160 1.027 9.3 15 23.1 0.01317 36.2 0.0104 1.0235 10.1 30 23.1 0.01317 31.6 0.0076 1.021 10.7 60 23.1 0.01317 27.9 0.0056 1.015 12.3 250 23.1 0.01317 18.8 0.0029 1.010 13.7 1440 23.1 0.01317 11.3 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 98.0 3/8"9.5 96.2 No. 4 4.8 95.1 No. 8 2.4 94.2 No. 10 2.0 94.0 No. 16 1.2 93.5 No. 30 0.6000 92.6 No. 40 0.4250 91.9 No. 50 0.3000 90.9 No. 100 0.1500 87.6 No. 200 0.0750 81.2 -0.0249 45.3 -0.0160 43.9 -0.0104 34.0 -0.0076 29.7 -0.0056 26.2 -0.0029 17.7 -0.0013 10.6 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-3 @ 15-20 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.044 4.6 2 22.8 0.01317 64.5 0.0200 1.043 4.9 5 22.8 0.01317 62.9 0.0130 1.042 5.1 15 22.8 0.01317 61.4 0.0077 1.0395 5.8 30 22.8 0.01317 57.5 0.0058 1.037 6.6 60 22.8 0.01317 52.8 0.0044 1.030 8.5 250 22.8 0.01317 41.9 0.0024 1.022 10.5 1440 22.8 0.01317 30.3 0.0011 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 97.5 3/8"9.5 97.5 No. 4 4.8 96.7 No. 8 2.4 96.7 No. 10 2.0 96.6 No. 16 1.2 96.4 No. 30 0.6000 96.2 No. 40 0.4250 96.2 No. 50 0.3000 96.0 No. 100 0.1500 95.8 No. 200 0.0750 95.1 -0.0200 62.3 -0.0130 60.8 -0.0077 59.3 -0.0058 55.5 -0.0044 51.0 -0.0024 40.5 -0.0011 29.3 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-3 @ 25-32 Material: Sample #: Date: 100.6 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.042 5.1 2 23.0 0.01317 53.8 0.0211 1.040 5.7 5 23.0 0.01317 51.1 0.0140 1.034 7.3 15 23.0 0.01317 42.9 0.0092 1.032 7.8 30 23.0 0.01317 40.2 0.0067 1.030 8.5 60 23.0 0.01317 36.8 0.0049 1.023 10.3 250 23.0 0.01317 27.2 0.0027 1.017 11.9 1440 23.0 0.01317 19.1 0.0012 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 91.7 3/8"9.5 89.8 No. 4 4.8 87.3 No. 8 2.4 85.6 No. 10 2.0 85.2 No. 16 1.2 84.1 No. 30 0.6000 82.5 No. 40 0.4250 81.5 No. 50 0.3000 80.3 No. 100 0.1500 77.5 No. 200 0.0750 72.1 -0.0211 45.8 -0.0140 43.5 -0.0092 36.6 -0.0067 34.2 -0.0049 31.3 -0.0027 23.2 -0.0012 16.2 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-4 @ 0-10 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.037 6.5 2 22.8 0.01317 55.4 0.0237 1.037 6.6 5 22.8 0.01317 54.6 0.0151 1.027 9.3 15 22.8 0.01317 38.5 0.0104 1.023 10.2 30 22.8 0.01317 32.9 0.0077 1.020 11.0 60 22.8 0.01317 28.1 0.0056 1.016 12.2 250 22.8 0.01317 20.9 0.0029 1.012 13.1 1440 22.8 0.01317 15.3 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 100.0 3/8"9.5 100.0 No. 4 4.8 100.0 No. 8 2.4 99.9 No. 10 2.0 99.8 No. 16 1.2 99.7 No. 30 0.6000 99.2 No. 40 0.4250 98.7 No. 50 0.3000 97.8 No. 100 0.1500 94.6 No. 200 0.0750 79.9 -0.0237 55.3 -0.0151 54.5 -0.0104 38.5 -0.0077 32.9 -0.0056 28.1 -0.0029 20.8 -0.0013 15.2 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-4 @ 10-20 Material: Sample #: Date: 100.6 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.027 9.1 2 25.5 0.01272 22.2 0.0272 1.024 9.9 5 25.5 0.01272 19.5 0.0179 1.022 10.5 15 25.5 0.01272 17.7 0.0106 1.02 11.0 30 25.5 0.01272 15.9 0.0077 1.018 11.5 60 25.5 0.01272 14.1 0.0056 1.013 12.9 250 25.8 0.01272 9.5 0.0029 1.011 13.4 1440 24.1 0.01301 7.7 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 85.3 3/8"9.5 79.5 No. 4 4.8 65.2 No. 8 2.4 57.8 No. 10 2.0 56.7 No. 16 1.2 54.2 No. 30 0.6000 52.2 No. 40 0.4250 51.4 No. 50 0.3000 50.6 No. 100 0.1500 47.8 No. 200 0.0750 43.2 -0.0272 12.6 -0.0179 11.1 -0.0106 10.0 -0.0077 9.0 -0.0056 8.0 -0.0029 5.4 -0.0013 4.4 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 Client:Geosyntec Project:ATK Launch Systems Project #:1652-005 Location:SV-4 @ 20-35 Material: Sample #: Date: 100.0 2.65 1.0025 Hydrometer Reading Effective Depth (cm) Interval of Time (min) Temperature (°C)K Soil Remaining in Suspension (%) Diameter of Particle (mm) 1.031 8.1 2 23.0 0.01317 45.8 0.0265 1.026 9.4 5 23.0 0.01317 37.7 0.0181 1.022 10.6 15 23.0 0.01317 30.5 0.0111 1.019 11.3 30 23.0 0.01317 26.5 0.0081 1.017 11.8 60 23.0 0.01317 23.3 0.0058 1.014 12.7 250 23.0 0.01317 17.7 0.0030 1.010 13.7 1440 23.0 0.01317 12.0 0.0013 Particle Size (in) Particle Size (mm) Passing (%)Specs Tolerance 4"100.0 100.0 3"75.0 100.0 2"50.0 100.0 1.5"37.5 100.0 1"25.0 100.0 3/4"19.0 100.0 1/2"12.5 100.0 3/8"9.5 100.0 No. 4 4.8 100.0 No. 8 2.4 99.8 No. 10 2.0 99.8 No. 16 1.2 99.7 No. 30 0.6000 99.6 No. 40 0.4250 99.4 No. 50 0.3000 98.7 No. 100 0.1500 94.0 No. 200 0.0750 79.3 -0.0265 45.7 -0.0181 37.7 -0.0111 30.5 -0.0081 26.5 -0.0058 23.2 -0.0030 17.6 -0.0013 12.0 Oven Dry Mass of Soil (g) Specific Gravity of Soil Particles Specific Gravity of the Liquid Particle Size Analysis of Soils - Hydrometer Method ASTM D 422 - AASHTO T 88 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 6 60 Cu SV-1 SV-1 SV-2 SV-2 SV-2 LL fine HYDROMETER 5.219 0.049 0.061 0.033 0.145 25 9.5 25 25 19 0.229 0.015 0.032 0.003 0.035 PL %Clay 1403 fine coarse 20 U.S. SIEVE NUMBERSU.S. SIEVE OPENING IN INCHES 2001.5 medium 6 8 10 PI Cc 2 D10 4 D100 SILT OR CLAY 4 D30 7.5 21.0 7.5 20.0 32.5 16 COBBLES GRAVEL SAND 0.30 8.14 0.16 3.24 D60 1 coarse 403 %Gravel %Sand %Silt GRAIN SIZE DISTRIBUTION - ASTM D422 14 Classification 50 7.5 21.0 7.5 20.0 32.5 SV-1 SV-1 SV-2 SV-2 SV-2 1003/4 1/2 3/8 35.9 24.4 23.4 17.6 27.1 154.77 30.47 23.21 54.65 PE R C E N T F I N E R B Y W E I G H T GRAIN SIZE (mm) 41.9 0.9 7.3 8.5 18.7 20.0 61.2 59.3 52.6 45.2 0.034 0.002 0.001 0.003 30 Sample Location Depth Sample Loctaion Depth 2.2 13.5 10.0 21.3 9.0 GeoSyntecNorthrup Grumman ATK Launch System,Project Number: 1652-005 Plate C - 3 C_ G S D L A B D A T A . G P J G E O S T R A T A . G D T 1 0 / 2 4 / 2 3 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 6 60 Cu SV-3 SV-3 SV-3 SV-4 SV-4 LL fine HYDROMETER 0.039 0.01 0.042 0.03 2.906 19 19 19 4.75 19 0.008 0.001 0.004 0.006 0.048 PL %Clay 1403 fine coarse 20 U.S. SIEVE NUMBERSU.S. SIEVE OPENING IN INCHES 2001.5 medium 6 8 10 PI Cc 2 D10 4 D100 SILT OR CLAY 4 D30 7.5 17.5 28.5 5.0 15.0 16 COBBLES GRAVEL SAND 0.08 D60 1 coarse 403 %Gravel %Sand %Silt GRAIN SIZE DISTRIBUTION - ASTM D422 14 Classification 50 7.5 17.5 28.5 5.0 15.0 SV-3 SV-3 SV-3 SV-4 SV-4 1003/4 1/2 3/8 13.9 1.6 15.2 20.1 22.0 274.11 PE R C E N T F I N E R B Y W E I G H T GRAIN SIZE (mm) 4.9 3.3 12.7 0.0 34.8 66.8 57.2 51.5 61.7 38.30.011 30 Sample Location Depth Sample Loctaion Depth 14.4 37.9 20.6 18.2 4.9 GeoSyntecNorthrup Grumman ATK Launch System,Project Number: 1652-005 Plate C - 4 C_ G S D L A B D A T A . G P J G E O S T R A T A . G D T 1 0 / 2 4 / 2 3 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 6 60 Cu SV-4 LL fine HYDROMETER 0.0414.75 0.011 PL %Clay 1403 fine coarse 20 U.S. SIEVE NUMBERSU.S. SIEVE OPENING IN INCHES 2001.5 medium 6 8 10 PI Cc 2 D10 4 D100 SILT OR CLAY 4 D30 27.5 16 COBBLES GRAVEL SAND D60 1 coarse 403 %Gravel %Sand %Silt GRAIN SIZE DISTRIBUTION - ASTM D422 14 Classification 50 27.5 SV-4 1003/4 1/2 3/8 20.7 PE R C E N T F I N E R B Y W E I G H T GRAIN SIZE (mm) 0.0 64.4 30 Sample Location Depth Sample Loctaion Depth 14.9 GeoSyntecNorthrup Grumman ATK Launch System,Project Number: 1652-005 Plate C - 5 C_ G S D L A B D A T A . G P J G E O S T R A T A . G D T 1 0 / 2 4 / 2 3 INTEGRATED GEOSCIENCES LABORATORIES, LLC Environmental * Geotechnical * Core Analysis 6016 Centralcrest Street Houston, Texas 77092 Telephone (713) 316-1800 Fax (877) 255-9953 October 6, 2023 Daniel J. Brown, P.E., Project Manager, Geostrata, 14425 S. Center Point Way, Bluffdale, UT 84065. Re: IGS Labs File No:2310-94 Project Name:ATK Launch System Project Number:1652-005 Site Location:N/A Subject:Final Report: Total/Air-Filled/Water-Filled Porosity-(API RP40), Dry Bulk Density- (ASTM D2937) . Dear Daniel J. Brown, Please find enclosed report for Physical Properties analyses conducted on soil samples received from your “ATK Launch System”project. All analyses were performed by applicable ASTM, EPA, or API methodologies. The samples are currently in storage and will be retained for thirty days past the completion of testing at no charge. Please note that the samples will be disposed of at that time. You may contact me regarding storage, disposal, or return of the samples. Integrated Geosciences Laboratories appreciate the opportunity to be of service. If you have any questions or require additional information, please contact me or Emeka Anazodo at (713) 316-1800. Sincerely, Integrated Geosciences Laboratories, LLC. Adebowale Ogunsola Integrated Geosciences Laboratories, LLC. Project Name:ATK Launch System IGS Labs File No:2310-94 Project Number: 1652-005 Client:GEOSTRATA Site Location:N/A Date Received:10/2/2023 Serial Sample ID Date; Time Depth Matrix Total/Air-Filled/Water-Filled Porosity Density: Bulk; dry unit weight Comments Number Sampled (feet)Type API RP40 ASTM D2937 DateR eceived:20231002 1 S V-01 (0-15)0-15 S oil X X ZiplockBag 2 S V-01 (15-27)15-27 S oil X X ZiplockBag 3 S V-02 (0-15)0-15 S oil X X ZiplockBag 4 S V-02 (15-25)15-25 S oil X X ZiplockBag 5 S V-02 (25-40)25-40 S oil X X ZiplockBag 6 S V-03 (0-15)0-15 S oil X X ZiplockBag 7 S V-03 (15-25)15-25 S oil X X ZiplockBag 8 S V-03 (25-32)25-32 S oil X X ZiplockBag 9 S V-04 (0-10)0-10 S oil X X ZiplockBag 10 S V-04 (10-20)10-20 S oil X X ZiplockBag 11 S V-04 (20-35)20-35 S oil X X ZiplockBag TOTAL 11 11 11 Laboratory Test Program Notes 1.S tandardT AT forbasicanalysisis10-15businessdays. TEST PROGRAM - 20231002 Rev. 1.0 20140226 CLIENT CONFIDENTIAL IGS Labs File No:2310-94 Project Name:ATK Launch System Client:GEOSTRATA Project Number:1652-005 Report Date:10/06/23 Site Location:N/A API RP 40 / METHODS: ASTM D2216 SAMPLE SAMPLE IGS Labs DEPTH,ORIENTATION DRY BULK,GRAIN, ID.ID ft.(1)% weight cm3/cm3 g/cc g/cc S V-01 (0-15)1 0-15 V 8.8 0.156 1.78 2.75 35.3 19.7 15.6 S V-01 (15-27)2 15-27 V 9.2 0.130 1.40 2.65 47.0 34.1 13.0 S V-02 (0-15)3 0-15 V 8.3 0.115 1.39 2.66 47.7 36.1 11.5 S V-02 (15-25)4 15-25 V 20.3 0.234 1.15 2.63 56.3 32.8 23.4 S V-02 (25-40)5 25-40 V 10.8 0.189 1.75 2.76 36.7 17.8 18.9 S V-03 (0-15)6 0-15 V 6.0 0.091 1.50 2.65 43.2 34.1 9.1 S V-03 (15-25)7 15-25 V 17.1 0.203 1.19 2.67 55.3 35.0 20.3 S V-03 (25-32)8 25-32 V 13.8 0.179 1.30 2.66 51.1 33.2 17.9 S V-04 (0-10)9 0-10 V 11.7 0.158 1.35 2.64 48.8 33.0 15.8 S V-04 (10-20)10 10-20 V 10.7 0.187 1.75 2.71 35.6 16.8 18.7 S V-04 (20-35)11 20-35 V 14.8 0.211 1.42 2.62 45.8 24.7 21.1 (1)S ampleO rientation:H = horizontal;V = vertical;R = remold (2)T otalP orosity= allnon& interconnectedporechannels;AirFilled= porechannelsnotoccupiedbyporefluids. Vb= BulkVolume,cc;--= Analysisnotrequested. TOTAL AIR-FILLED WATER-FILLED Integrated Geosciences Laboratories, LLC. PHYSICAL PROPERTIES DATA API RP 40 API RP 40 DENSITY POROSITY, %Vb (2)MOISTURE IGS Labs File No:2310-94 Project Name:ATK Launch System Client:GEOSTRATA Project No:1652-005 Report Date:10/6/2023 Site Location:N/A TOTAL SAMPLE MOISTURE VOLUMETRIC DRY BULK SAMPLE IGS DEPTH,ANALYSIS VOLUME,CONTENT,MOISTURE CONTENT,DENSITY, ID.ID ft.DATE cc % wt fraction Vb g/cc SV-01 (0-15)1 0-15 20230303 142.04 8.8 0.151 1.72 SV-01 (15-27)2 15-27 20230303 142.04 9.1 0.132 1.44 SV-02 (0-15)3 0-15 20230303 142.04 7.5 0.109 1.46 SV-02 (15-25)4 15-25 20230303 136.42 18.0 0.238 1.32 SV-02 (25-40)5 25-40 20230303 142.04 10.8 0.176 1.62 SV-03 (0-15)6 0-15 20230303 142.04 5.5 0.085 1.53 SV-03 (15-25)7 15-25 20230303 138.06 16.3 0.221 1.35 SV-03 (25-32)8 25-32 20230303 142.04 13.3 0.189 1.43 SV-04 (0-10)9 0-10 20230303 142.04 11.2 0.161 1.44 SV-04 (10-20)10 10-20 20230303 142.04 9.3 0.165 1.77 SV-04 (20-35)11 20-35 20230303 142.04 15.6 0.231 1.48 (1) Total Porosity by calculated method Specific gravity used for calculation of total porosity is 2.62-2.68 Water = 0.9981 g/cc; Vb = Bulk Volume (Methodology: ASTM D2937, calculation) Integrated Geosciences Laboratories, LLC DRY BULK DENSITY OF IN-PLACE SOIL and TOTAL POROSITY (CALCULATED) ATTACHMENT C SOIL VAPOR PROBE CONSTRUCTION LOGS SOIL GAS PROBE CONSTRUCTION Probe ID Project Name Project Number Permit Number Installation Date(s) Drilling Method Borehole Diameter Materials Used Pipe/Tubing : Diameter cm/inches Construction Site Location Field Personnel Recorded By Nylaflow Tubing Other Soil Gas Length cm/inches Implant : Diameter cm/inches Construction Length cm/inches Stickup cm/inches Construction Protective Casing: Cast Aluminum Cast Steel Other Surface Fitting:Ball valve with compression fittings Other Flush mount Above grade Casing Installation: Drilling Contractor Driller Stainless Steel Brass Polyethylene Other Depth cm/inches Diameter cm/inches feet* feet* feet* feet* feet* * Depth Below Ground Surface ground surface elevation surveyed estimated granular bentonite bentonite nylaflow tubing other concrete cement ball valve with compression fittings other drilled hole in diameter filter sand #2 other stainless steel soil gas implant brass polyethylene other So i l G a s P r o b e C o n s t r u c t i o n 2 0 1 6 _ T R 0 2 5 4 . a i Temporary Soil Gas Probe Permanent Soil Gas Probe ATK Launch Systems - Promontory DE0188D 1/4 inch X 6 inch 1/4 inch X X 3-way valve X 6 inch X 3URmRntRUy 8tah 2 inch -grout mix 0' Jess Welch and Ethan Upton 3-way valve SV-01S 9/14/23 4375 ft 14' 2" 14' 13.5' 13' Jess Welch 12.5' -------------------------------------------------- 2 Inch DLUect 3ush SeUYLces DPT Jaret Bromley SOIL GAS PROBE CONSTRUCTION Probe ID Project Name Project Number Permit Number Installation Date(s) Drilling Method Borehole Diameter Materials Used Pipe/Tubing : Diameter cm/inches Construction Site Location Field Personnel Recorded By Nylaflow Tubing Other Soil Gas Length cm/inches Implant : Diameter cm/inches Construction Length cm/inches Stickup cm/inches Construction Protective Casing: Cast Aluminum Cast Steel Other Surface Fitting:Ball valve with compression fittings Other Flush mount Above grade Casing Installation: Drilling Contractor Driller Stainless Steel Brass Polyethylene Other Depth cm/inches Diameter cm/inches feet* feet* feet* feet* feet* * Depth Below Ground Surface ground surface elevation surveyed estimated granular bentonite bentonite nylaflow tubing other concrete cement ball valve with compression fittings other drilled hole in diameter filter sand #2 other stainless steel soil gas implant brass polyethylene other So i l G a s P r o b e C o n s t r u c t i o n 2 0 1 6 _ T R 0 2 5 4 . a i Temporary Soil Gas Probe Permanent Soil Gas Probe ATK Launch Systems - Promontory DE0188D 1/4 inch X 6 inch 1/4 inch X X 3-way valve X 6 inch X 3URmRntRUy 8tah 2 inch -grout mix 0' Jess Welch and Ethan Upton 3-way valve 9/14/23 4375 ft SV-01D 27' 27' 2" 26.5' 26' Jess Welch 25.5' -------------------------------------------------- 2 Inch DLUect 3ush SeUYLces DPT Jaret Bromley SOIL GAS PROBE CONSTRUCTION Probe ID Project Name Project Number Permit Number Installation Date(s) Drilling Method Borehole Diameter Materials Used Pipe/Tubing : Diameter cm/inches Construction Site Location Field Personnel Recorded By Nylaflow Tubing Other Soil Gas Length cm/inches Implant : Diameter cm/inches Construction Length cm/inches Stickup cm/inches Construction Protective Casing: Cast Aluminum Cast Steel Other Surface Fitting:Ball valve with compression fittings Other Flush mount Above grade Casing Installation: Drilling Contractor Driller Stainless Steel Brass Polyethylene Other Depth cm/inches Diameter cm/inches feet* feet* feet* feet* feet* * Depth Below Ground Surface ground surface elevation surveyed estimated granular bentonite bentonite nylaflow tubing other concrete cement ball valve with compression fittings other drilled hole in diameter filter sand #2 other stainless steel soil gas implant brass polyethylene other So i l G a s P r o b e C o n s t r u c t i o n 2 0 1 6 _ T R 0 2 5 4 . a i Temporary Soil Gas Probe Permanent Soil Gas Probe ATK Launch Systems - Promontory DE0188D 1/4 inch X 6 inch 1/4 inch X X 3-way valve X 6 inch X Promontory, Utah 2 inch -grout mix 0' Jess Welch and Ethan Upton 3-way valve SV-02S 9/12/23 4360 ft 15' 2" 15' 14.5' 14' Jess Welch 13.5' -------------------------------------------------- 2 Inch Direct Push Services DPT Jaret Bromley SOIL GAS PROBE CONSTRUCTION Probe ID Project Name Project Number Permit Number Installation Date(s) Drilling Method Borehole Diameter Materials Used Pipe/Tubing : Diameter cm/inches Construction Site Location Field Personnel Recorded By Nylaflow Tubing Other Soil Gas Length cm/inches Implant : Diameter cm/inches Construction Length cm/inches Stickup cm/inches Construction Protective Casing: Cast Aluminum Cast Steel Other Surface Fitting:Ball valve with compression fittings Other Flush mount Above grade Casing Installation: Drilling Contractor Driller Stainless Steel Brass Polyethylene Other Depth cm/inches Diameter cm/inches feet* feet* feet* feet* feet* * Depth Below Ground Surface ground surface elevation surveyed estimated granular bentonite bentonite nylaflow tubing other concrete cement ball valve with compression fittings other drilled hole in diameter filter sand #2 other stainless steel soil gas implant brass polyethylene other So i l G a s P r o b e C o n s t r u c t i o n 2 0 1 6 _ T R 0 2 5 4 . a i Temporary Soil Gas Probe Permanent Soil Gas Probe ATK Launch Systems - Promontory DE0188D 1/4 inch X 6 inch 1/4 inch X X 3-way valve X 6 inch X Promontory, Utah 2 inch -grout mix 0' Jess Welch and Ethan Upton 3-way valve 9/12/23 4360 ft SV-02M 27' 2" 27' 26.5' 26' Jess Welch 25.5' -------------------------------------------------- 2 Inch DLrect Push SerYLces DPT Jaret Bromley SOIL GAS PROBE CONSTRUCTION Probe ID Project Name Project Number Permit Number Installation Date(s) Drilling Method Borehole Diameter Materials Used Pipe/Tubing : Diameter cm/inches Construction Site Location Field Personnel Recorded By Nylaflow Tubing Other Soil Gas Length cm/inches Implant : Diameter cm/inches Construction Length cm/inches Stickup cm/inches Construction Protective Casing: Cast Aluminum Cast Steel Other Surface Fitting:Ball valve with compression fittings Other Flush mount Above grade Casing Installation: Drilling Contractor Driller Stainless Steel Brass Polyethylene Other Depth cm/inches Diameter cm/inches feet* feet* feet* feet* feet* * Depth Below Ground Surface ground surface elevation surveyed estimated granular bentonite bentonite nylaflow tubing other concrete cement ball valve with compression fittings other drilled hole in diameter filter sand #2 other stainless steel soil gas implant brass polyethylene other So i l G a s P r o b e C o n s t r u c t i o n 2 0 1 6 _ T R 0 2 5 4 . a i Temporary Soil Gas Probe Permanent Soil Gas Probe ATK Launch Systems - Promontory DE0188D 1/4 inch X 6 inch 1/4 inch X X 3-way valve X 6 inch X 3URmRntRUy 8tah 2 inch -grout mix 0' Jess Welch and Ethan Upton 3-way valve 9/12/23 4360 ft SV-02D 37' 8" 37' 36.5' 36' Jess Welch 37.5' -------------------------------------------------- 2 Inch DLUect 3ush SeUYLces DPT Jaret Bromley SOIL GAS PROBE CONSTRUCTION Probe ID Project Name Project Number Permit Number Installation Date(s) Drilling Method Borehole Diameter Materials Used Pipe/Tubing : Diameter cm/inches Construction Site Location Field Personnel Recorded By Nylaflow Tubing Other Soil Gas Length cm/inches Implant : Diameter cm/inches Construction Length cm/inches Stickup cm/inches Construction Protective Casing: Cast Aluminum Cast Steel Other Surface Fitting:Ball valve with compression fittings Other Flush mount Above grade Casing Installation: Drilling Contractor Driller Stainless Steel Brass Polyethylene Other Depth cm/inches Diameter cm/inches feet* feet* feet* feet* feet* * Depth Below Ground Surface ground surface elevation surveyed estimated granular bentonite bentonite nylaflow tubing other concrete cement ball valve with compression fittings other drilled hole in diameter filter sand #2 other stainless steel soil gas implant brass polyethylene other So i l G a s P r o b e C o n s t r u c t i o n 2 0 1 6 _ T R 0 2 5 4 . a i Temporary Soil Gas Probe Permanent Soil Gas Probe ATK Launch Systems - Promontory DE0188D 1/4 inch X 6 inch 1/4 inch X X 3-way valve X 6 inch X Promontory, Utah 2 inch -grout mix 0' Jess Welch and Ethan Upton 3-way valve SV-03S 9/11/23 12' 2" 12' 11.5' 11' 10.5' Jess Welch 4370 ft -------------------------------------------------- 2 Inch Direct Push Services DPT Jaret Bromley SOIL GAS PROBE CONSTRUCTION Probe ID Project Name Project Number Permit Number Installation Date(s) Drilling Method Borehole Diameter Materials Used Pipe/Tubing : Diameter cm/inches Construction Site Location Field Personnel Recorded By Nylaflow Tubing Other Soil Gas Length cm/inches Implant : Diameter cm/inches Construction Length cm/inches Stickup cm/inches Construction Protective Casing: Cast Aluminum Cast Steel Other Surface Fitting:Ball valve with compression fittings Other Flush mount Above grade Casing Installation: Drilling Contractor Driller Stainless Steel Brass Polyethylene Other Depth cm/inches Diameter cm/inches feet* feet* feet* feet* feet* * Depth Below Ground Surface ground surface elevation surveyed estimated granular bentonite bentonite nylaflow tubing other concrete cement ball valve with compression fittings other drilled hole in diameter filter sand #2 other stainless steel soil gas implant brass polyethylene other So i l G a s P r o b e C o n s t r u c t i o n 2 0 1 6 _ T R 0 2 5 4 . a i Temporary Soil Gas Probe Permanent Soil Gas Probe ATK Launch Systems - Promontory DE0188D 1/4 inch X 6 inch 1/4 inch X X 3-way valve X 6 inch X Promontory, Utah 2 inch -grout mix 0' Jess Welch and Ethan Upton 3-way valve 9/11/23 4370 ft SV-03M 27' 2" 27' 26.5' 26' Jess Welch 25.5' -------------------------------------------------- 2 Inch Direct Push Services DPT Jaret Bromley SOIL GAS PROBE CONSTRUCTION Probe ID Project Name Project Number Permit Number Installation Date(s) Drilling Method Borehole Diameter Materials Used Pipe/Tubing : Diameter cm/inches Construction Site Location Field Personnel Recorded By Nylaflow Tubing Other Soil Gas Length cm/inches Implant : Diameter cm/inches Construction Length cm/inches Stickup cm/inches Construction Protective Casing: Cast Aluminum Cast Steel Other Surface Fitting:Ball valve with compression fittings Other Flush mount Above grade Casing Installation: Drilling Contractor Driller Stainless Steel Brass Polyethylene Other Depth cm/inches Diameter cm/inches feet* feet* feet* feet* feet* * Depth Below Ground Surface ground surface elevation surveyed estimated granular bentonite bentonite nylaflow tubing other concrete cement ball valve with compression fittings other drilled hole in diameter filter sand #2 other stainless steel soil gas implant brass polyethylene other So i l G a s P r o b e C o n s t r u c t i o n 2 0 1 6 _ T R 0 2 5 4 . a i Temporary Soil Gas Probe Permanent Soil Gas Probe SV-04S ATK Promontory DPT Jaret Bromley 1/4 inch X 6 inch 1/4 inch X X 3-way valve X DE0188D 6 inch X 15' 2" 15' 14.5' 13.5' 14' 2 inch -grout mix ATK 0'4325 ft 3-way valve Jess Welch and Ethan Upton Jess Welch -------------------------------------------------- 9/13/23 -9/14/23 2 Inch DPS SOIL GAS PROBE CONSTRUCTION Probe ID Project Name Project Number Permit Number Installation Date(s) Drilling Method Borehole Diameter Materials Used Pipe/Tubing : Diameter cm/inches Construction Site Location Field Personnel Recorded By Nylaflow Tubing Other Soil Gas Length cm/inches Implant : Diameter cm/inches Construction Length cm/inches Stickup cm/inches Construction Protective Casing: Cast Aluminum Cast Steel Other Surface Fitting:Ball valve with compression fittings Other Flush mount Above grade Casing Installation: Drilling Contractor Driller Stainless Steel Brass Polyethylene Other Depth cm/inches Diameter cm/inches feet* feet* feet* feet* feet* * Depth Below Ground Surface ground surface elevation surveyed estimated granular bentonite bentonite nylaflow tubing other concrete cement ball valve with compression fittings other drilled hole in diameter filter sand #2 other stainless steel soil gas implant brass polyethylene other So i l G a s P r o b e C o n s t r u c t i o n 2 0 1 6 _ T R 0 2 5 4 . a i Temporary Soil Gas Probe Permanent Soil Gas Probe ATK Promontory DE0188D 1/4 inch X 6 inch 1/4 inch X X 3-way valve X 6 inch X ATK 2 inch -grout mix 0'4325 ft Jess Welch and Ethan Upton 3-way valve SV-04M 9/13/23 26' 2" 26' 25.5' 25' Jess Welch 24.5' -------------------------------------------------- 2 Inch DPS DPT Jaret Bromley SOIL GAS PROBE CONSTRUCTION Probe ID Project Name Project Number Permit Number Installation Date(s) Drilling Method Borehole Diameter Materials Used Pipe/Tubing : Diameter cm/inches Construction Site Location Field Personnel Recorded By Nylaflow Tubing Other Soil Gas Length cm/inches Implant : Diameter cm/inches Construction Length cm/inches Stickup cm/inches Construction Protective Casing: Cast Aluminum Cast Steel Other Surface Fitting:Ball valve with compression fittings Other Flush mount Above grade Casing Installation: Drilling Contractor Driller Stainless Steel Brass Polyethylene Other Depth cm/inches Diameter cm/inches feet* feet* feet* feet* feet* * Depth Below Ground Surface ground surface elevation surveyed estimated granular bentonite bentonite nylaflow tubing other concrete cement ball valve with compression fittings other drilled hole in diameter filter sand #2 other stainless steel soil gas implant brass polyethylene other So i l G a s P r o b e C o n s t r u c t i o n 2 0 1 6 _ T R 0 2 5 4 . a i Temporary Soil Gas Probe Permanent Soil Gas Probe ATK Promontory DE0188D 1/4 inch X 6 inch 1/4 inch X X 3-way valve X 6 inch X ATK 2 inch -grout mix 0'4325 ft Jess Welch and Ethan Upton 3-way valve 9/13/23 SV-04D 33' 8" 33.5' 33' 32.5' Jess Welch 32' -------------------------------------------------- 2 Inch DPS DPT Jaret Bromley ATTACHMENT D SOIL VAPOR SAMPLE COLLECTION FORMS ATTACHMENT E LABORATORY ANALYTICAL REPORT 10/24/2023 Mr. Brian Smith GeoSyntec Consultants 215 South State Street Suite 500 Salt Lake City UT 84111 Project Name: Soil Vapor Evaluation Project #: DE0188D Dear Mr. Brian Smith The following report includes the data for the above referenced project for sample(s) received on 10/9/2023 at Eurofins Air Toxics LLC. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics LLC. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Monica Tran at 916-985-1000 if you have any questions regarding the data in this report. Regards, Monica Tran Project Manager Workorder #: 2310251 Page 1 of 37 Mr. Brian Smith GeoSyntec Consultants 215 South State Street Suite 500 Salt Lake City, UT 84111 WORK ORDER #: 2310251 CLIENT:BILL TO: PHONE: Accounts Payable-OC GeoSyntec Consultants 3530 Hyland Avenue Suite 100 Costa Mesa, CA 92626 801-853-8459 10/09/2023 DATE COMPLETED:10/24/2023 P.O. #100052922 PROJECT #DE0188D Soil Vapor Evaluation Work Order Summary FAX: DATE RECEIVED:CONTACT:Monica Tran NAMEFRACTION #TEST VAC./PRES. RECEIPT PRESSURE FINAL 01A SV-02S-10042023 TO-15 9.0 "Hg 10 psi 02A SV-02M-10042023 TO-15 7.0 "Hg 10 psi 03A SV-02D-10042023 TO-15 7.5 "Hg 10 psi 04A SV-04S-10042023 TO-15 8.0 "Hg 10 psi 05A SV-04M-10042023 TO-15 8.5 "Hg 10 psi 06A SV-04D-10042023 TO-15 10.0 "Hg 10 psi 07A SV-03S-10032023 TO-15 6.5 "Hg 10 psi 08A SV-03S-10032023-DUP TO-15 7.0 "Hg 10 psi 09A SV-03M-10032023 TO-15 8.0 "Hg 10 psi 10A SV-01S-10032023 TO-15 8.5 "Hg 10 psi 11A SV-01D-10032023 TO-15 8.6 "Hg 10 psi 12A Lab Blank TO-15 NA NA 13A CCV TO-15 NA NA 14A LCS TO-15 NA NA 14AA LCSD TO-15 NA NA CERTIFIED BY: Technical Director DATE: 10/24/23 Page 2 of 37 Certification numbers: AZ Licensure AZ0775, FL NELAP – E87680, LA NELAP – 02089, NH NELAP – 209222, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP – T104704434-22-18, UT NELAP – CA009332022-14, VA NELAP - 12240, WA ELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) CA300005-017 Eurofins Environment Testing Northern California, LLC certifies that the test results contained in this report meet all requirements of the 2016 TNI Standard. This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, LLC. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000 LABORATORY NARRATIVE EPA Method TO-15 GeoSyntec Consultants Workorder# 2310251 Eleven 1 Liter Summa Canister samples were received on October 09, 2023. The laboratory performed analysis via EPA Method TO-15 using GC/MS in the full scan mode. There were no receiving discrepancies. Receiving Notes Dilution was performed on samples SV-03S-10032023, SV-03S-10032023-DUP and SV-03M-10032023 due to the presence of high level target species. Analytical Notes Ten qualifiers may have been used on the data analysis sheets and indicates as follows: B - Compound present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - Compound analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. M - Reported value may be biased due to apparent matrix interferences. CN - See Case Narrative. File extensions may have been used on the data analysis sheets and indicates as follows: a-File was requantified b-File was quantified by a second column and detector r1-File was requantified for the purpose of reissue Definition of Data Qualifying Flags Page 3 of 37 EPA METHOD TO-15 GC/MS FULL SCAN Summary of Detected Compounds Client Sample ID: SV-02S-10042023 Lab ID#: 2310251-01A (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.2 10 4.8 401,1-Dichloroethene 4.8 5.5 15 17Carbon Disulfide 1.2 2.7 5.8 13Chloroform 1.2 13 6.4 69Trichloroethene 2.4 2.5 9.0 9.4Toluene 1.2 1.2 5.2 5.4Ethyl Benzene 2.4 5.1 10 22m,p-Xylene 1.2 1.9 5.2 8.4o-Xylene 1.2 2.8 5.9 144-Ethyltoluene 1.2 3.3 5.9 161,2,4-Trimethylbenzene Client Sample ID: SV-02M-10042023 Lab ID#: 2310251-02A (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.1 1.5 6.2 8.6Freon 11 1.1 30 4.3 1201,1-Dichloroethene 1.1 4.0 5.3 19Chloroform 1.1 1.1 6.0 6.01,1,1-Trichloroethane 1.1 31 5.9 160Trichloroethene 1.1 1.5 7.4 10Tetrachloroethene 1.1 1.3 5.4 6.44-Ethyltoluene 1.1 2.2 5.4 111,2,4-Trimethylbenzene Client Sample ID: SV-02D-10042023 Lab ID#: 2310251-03A (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.1 1.8 6.3 10Freon 11 1.1 43 4.4 1701,1-Dichloroethene 1.1 5.1 5.5 25Chloroform 1.1 1.5 6.1 8.21,1,1-Trichloroethane 1.1 50 6.0 270Trichloroethene Page 4 of 37 EPA METHOD TO-15 GC/MS FULL SCAN Summary of Detected Compounds Client Sample ID: SV-02D-10042023 Lab ID#: 2310251-03A 2.2 2.2 J 8.4 8.2 JToluene 2.2 4.3 9.7 19m,p-Xylene 1.1 1.5 4.9 6.6o-Xylene 1.1 2.0 5.5 104-Ethyltoluene 1.1 3.0 5.5 151,2,4-Trimethylbenzene Client Sample ID: SV-04S-10042023 Lab ID#: 2310251-04A No Detections Were Found. Client Sample ID: SV-04M-10042023 Lab ID#: 2310251-05A (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 12 14 28 33Acetone 1.2 2.3 6.3 12Trichloroethene 1.2 1.3 5.8 6.31,2,4-Trimethylbenzene Client Sample ID: SV-04D-10042023 Lab ID#: 2310251-06A (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 13 23 30 54Acetone 1.3 3.3 6.8 18Trichloroethene 2.5 3.1 9.5 12Toluene 1.3 1.4 5.5 6.0Ethyl Benzene 2.5 4.1 11 18m,p-Xylene 1.3 2.2 5.5 9.7o-Xylene Client Sample ID: SV-03S-10032023 Lab ID#: 2310251-07A (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 2.1 150 8.5 5801,1-Dichloroethene Page 5 of 37 EPA METHOD TO-15 GC/MS FULL SCAN Summary of Detected Compounds Client Sample ID: SV-03S-10032023 Lab ID#: 2310251-07A 2.1 3.0 8.7 121,1-Dichloroethane 2.1 3.9 8.5 15cis-1,2-Dichloroethene 2.1 11 10 55Chloroform 2.1 23 12 1201,1,1-Trichloroethane 2.1 550 12 3000Trichloroethene Client Sample ID: SV-03S-10032023-DUP Lab ID#: 2310251-08A (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 22 26 41 49Ethanol 2.2 150 8.7 6001,1-Dichloroethene 22 24 52 56Acetone 2.2 3.0 8.9 121,1-Dichloroethane 2.2 4.1 8.7 16cis-1,2-Dichloroethene 2.2 11 11 56Chloroform 2.2 24 12 1301,1,1-Trichloroethane 2.2 560 12 3000Trichloroethene Client Sample ID: SV-03M-10032023 Lab ID#: 2310251-09A (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 5.7 490 23 20001,1-Dichloroethene 5.7 10 23 421,1-Dichloroethane 5.7 19 22 75cis-1,2-Dichloroethene 5.7 17 28 82Chloroform 5.7 53 31 2901,1,1-Trichloroethane 5.7 1500 31 8200Trichloroethene 5.7 5.8 28 281,2,4-Trimethylbenzene Client Sample ID: SV-01S-10032023 Lab ID#: 2310251-10A Page 6 of 37 EPA METHOD TO-15 GC/MS FULL SCAN Summary of Detected Compounds Client Sample ID: SV-01S-10032023 Lab ID#: 2310251-10A (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.2 1.8 5.7 8.7Chloroform 1.2 13 6.3 69Trichloroethene Client Sample ID: SV-01D-10032023 Lab ID#: 2310251-11A (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.2 2.8 4.7 111,1-Dichloroethene 1.2 2.6 5.8 12Chloroform 1.2 22 6.3 120Trichloroethene 1.2 1.2 8.0 8.0Tetrachloroethene Page 7 of 37 Client Sample ID: SV-02S-10042023 Lab ID#: 2310251-01A EPA METHOD TO-15 GC/MS FULL SCAN 91102009File Name: Dil. Factor:2.40 Date of Collection: 10/4/23 11:08:00 AM Date of Analysis: 10/20/23 02:15 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.2 Not Detected 5.9 Not DetectedFreon 12 1.2 Not Detected 8.4 Not DetectedFreon 114 12 Not Detected 25 Not DetectedChloromethane 1.2 Not Detected 3.1 Not DetectedVinyl Chloride 1.2 Not Detected 2.6 Not Detected1,3-Butadiene 12 Not Detected 47 Not DetectedBromomethane 4.8 Not Detected 13 Not DetectedChloroethane 1.2 Not Detected 6.7 Not DetectedFreon 11 12 Not Detected 23 Not DetectedEthanol 1.2 Not Detected 9.2 Not DetectedFreon 113 1.2 10 4.8 401,1-Dichloroethene 12 Not Detected 28 Not DetectedAcetone 4.8 Not Detected 12 Not Detected2-Propanol 4.8 5.5 15 17Carbon Disulfide 4.8 Not Detected 15 Not Detected3-Chloropropene 12 Not Detected 42 Not DetectedMethylene Chloride 4.8 Not Detected 17 Not DetectedMethyl tert-butyl ether 1.2 Not Detected 4.8 Not Detectedtrans-1,2-Dichloroethene 1.2 Not Detected 4.2 Not DetectedHexane 1.2 Not Detected 4.8 Not Detected1,1-Dichloroethane 4.8 Not Detected 14 Not Detected2-Butanone (Methyl Ethyl Ketone) 1.2 Not Detected 4.8 Not Detectedcis-1,2-Dichloroethene 1.2 Not Detected 3.5 Not DetectedTetrahydrofuran 1.2 2.7 5.8 13Chloroform 1.2 Not Detected 6.5 Not Detected1,1,1-Trichloroethane 1.2 Not Detected 4.1 Not DetectedCyclohexane 1.2 Not Detected 7.6 Not DetectedCarbon Tetrachloride 1.2 Not Detected 5.6 Not Detected2,2,4-Trimethylpentane 1.2 Not Detected 3.8 Not DetectedBenzene 1.2 Not Detected 4.8 Not Detected1,2-Dichloroethane 1.2 Not Detected 4.9 Not DetectedHeptane 1.2 13 6.4 69Trichloroethene 1.2 Not Detected 5.5 Not Detected1,2-Dichloropropane 4.8 Not Detected 17 Not Detected1,4-Dioxane 1.2 Not Detected 8.0 Not DetectedBromodichloromethane 1.2 Not Detected 5.4 Not Detectedcis-1,3-Dichloropropene 1.2 Not Detected 4.9 Not Detected4-Methyl-2-pentanone 2.4 2.5 9.0 9.4Toluene 1.2 Not Detected 5.4 Not Detectedtrans-1,3-Dichloropropene 1.2 Not Detected 6.5 Not Detected1,1,2-Trichloroethane 1.2 Not Detected 8.1 Not DetectedTetrachloroethene 4.8 Not Detected 20 Not Detected2-Hexanone Page 8 of 37 Client Sample ID: SV-02S-10042023 Lab ID#: 2310251-01A EPA METHOD TO-15 GC/MS FULL SCAN 91102009File Name: Dil. Factor:2.40 Date of Collection: 10/4/23 11:08:00 AM Date of Analysis: 10/20/23 02:15 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.2 Not Detected 10 Not DetectedDibromochloromethane 1.2 Not Detected 9.2 Not Detected1,2-Dibromoethane (EDB) 1.2 Not Detected 5.5 Not DetectedChlorobenzene 1.2 1.2 5.2 5.4Ethyl Benzene 2.4 5.1 10 22m,p-Xylene 1.2 1.9 5.2 8.4o-Xylene 1.2 Not Detected 5.1 Not DetectedStyrene 1.2 Not Detected 12 Not DetectedBromoform 1.2 Not Detected 5.9 Not DetectedCumene 1.2 Not Detected 8.2 Not Detected1,1,2,2-Tetrachloroethane 1.2 Not Detected 5.9 Not DetectedPropylbenzene 1.2 2.8 5.9 144-Ethyltoluene 1.2 Not Detected 5.9 Not Detected1,3,5-Trimethylbenzene 1.2 3.3 5.9 161,2,4-Trimethylbenzene 1.2 Not Detected 7.2 Not Detected1,3-Dichlorobenzene 1.2 Not Detected 7.2 Not Detected1,4-Dichlorobenzene 1.2 Not Detected 6.2 Not Detectedalpha-Chlorotoluene 1.2 Not Detected 7.2 Not Detected1,2-Dichlorobenzene 4.8 Not Detected 36 Not Detected1,2,4-Trichlorobenzene 4.8 Not Detected 51 Not DetectedHexachlorobutadiene Container Type: 1 Liter Summa Canister Limits%RecoverySurrogates Method 97 70-130Toluene-d8 113 70-1301,2-Dichloroethane-d4 105 70-1304-Bromofluorobenzene Page 9 of 37 Client Sample ID: SV-02M-10042023 Lab ID#: 2310251-02A EPA METHOD TO-15 GC/MS FULL SCAN 91102010File Name: Dil. Factor:2.19 Date of Collection: 10/4/23 10:28:00 AM Date of Analysis: 10/20/23 02:40 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.1 Not Detected 5.4 Not DetectedFreon 12 1.1 Not Detected 7.6 Not DetectedFreon 114 11 Not Detected 23 Not DetectedChloromethane 1.1 Not Detected 2.8 Not DetectedVinyl Chloride 1.1 Not Detected 2.4 Not Detected1,3-Butadiene 11 Not Detected 42 Not DetectedBromomethane 4.4 Not Detected 12 Not DetectedChloroethane 1.1 1.5 6.2 8.6Freon 11 11 Not Detected 21 Not DetectedEthanol 1.1 Not Detected 8.4 Not DetectedFreon 113 1.1 30 4.3 1201,1-Dichloroethene 11 Not Detected 26 Not DetectedAcetone 4.4 Not Detected 11 Not Detected2-Propanol 4.4 Not Detected 14 Not DetectedCarbon Disulfide 4.4 Not Detected 14 Not Detected3-Chloropropene 11 Not Detected 38 Not DetectedMethylene Chloride 4.4 Not Detected 16 Not DetectedMethyl tert-butyl ether 1.1 Not Detected 4.3 Not Detectedtrans-1,2-Dichloroethene 1.1 Not Detected 3.8 Not DetectedHexane 1.1 Not Detected 4.4 Not Detected1,1-Dichloroethane 4.4 Not Detected 13 Not Detected2-Butanone (Methyl Ethyl Ketone) 1.1 Not Detected 4.3 Not Detectedcis-1,2-Dichloroethene 1.1 Not Detected 3.2 Not DetectedTetrahydrofuran 1.1 4.0 5.3 19Chloroform 1.1 1.1 6.0 6.01,1,1-Trichloroethane 1.1 Not Detected 3.8 Not DetectedCyclohexane 1.1 Not Detected 6.9 Not DetectedCarbon Tetrachloride 1.1 Not Detected 5.1 Not Detected2,2,4-Trimethylpentane 1.1 Not Detected 3.5 Not DetectedBenzene 1.1 Not Detected 4.4 Not Detected1,2-Dichloroethane 1.1 Not Detected 4.5 Not DetectedHeptane 1.1 31 5.9 160Trichloroethene 1.1 Not Detected 5.1 Not Detected1,2-Dichloropropane 4.4 Not Detected 16 Not Detected1,4-Dioxane 1.1 Not Detected 7.3 Not DetectedBromodichloromethane 1.1 Not Detected 5.0 Not Detectedcis-1,3-Dichloropropene 1.1 Not Detected 4.5 Not Detected4-Methyl-2-pentanone 2.2 Not Detected 8.2 Not DetectedToluene 1.1 Not Detected 5.0 Not Detectedtrans-1,3-Dichloropropene 1.1 Not Detected 6.0 Not Detected1,1,2-Trichloroethane 1.1 1.5 7.4 10Tetrachloroethene 4.4 Not Detected 18 Not Detected2-Hexanone Page 10 of 37 Client Sample ID: SV-02M-10042023 Lab ID#: 2310251-02A EPA METHOD TO-15 GC/MS FULL SCAN 91102010File Name: Dil. Factor:2.19 Date of Collection: 10/4/23 10:28:00 AM Date of Analysis: 10/20/23 02:40 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.1 Not Detected 9.3 Not DetectedDibromochloromethane 1.1 Not Detected 8.4 Not Detected1,2-Dibromoethane (EDB) 1.1 Not Detected 5.0 Not DetectedChlorobenzene 1.1 Not Detected 4.8 Not DetectedEthyl Benzene 2.2 Not Detected 9.5 Not Detectedm,p-Xylene 1.1 Not Detected 4.8 Not Detectedo-Xylene 1.1 Not Detected 4.7 Not DetectedStyrene 1.1 Not Detected 11 Not DetectedBromoform 1.1 Not Detected 5.4 Not DetectedCumene 1.1 Not Detected 7.5 Not Detected1,1,2,2-Tetrachloroethane 1.1 Not Detected 5.4 Not DetectedPropylbenzene 1.1 1.3 5.4 6.44-Ethyltoluene 1.1 Not Detected 5.4 Not Detected1,3,5-Trimethylbenzene 1.1 2.2 5.4 111,2,4-Trimethylbenzene 1.1 Not Detected 6.6 Not Detected1,3-Dichlorobenzene 1.1 Not Detected 6.6 Not Detected1,4-Dichlorobenzene 1.1 Not Detected 5.7 Not Detectedalpha-Chlorotoluene 1.1 Not Detected 6.6 Not Detected1,2-Dichlorobenzene 4.4 Not Detected 32 Not Detected1,2,4-Trichlorobenzene 4.4 Not Detected 47 Not DetectedHexachlorobutadiene Container Type: 1 Liter Summa Canister Limits%RecoverySurrogates Method 96 70-130Toluene-d8 112 70-1301,2-Dichloroethane-d4 101 70-1304-Bromofluorobenzene Page 11 of 37 Client Sample ID: SV-02D-10042023 Lab ID#: 2310251-03A EPA METHOD TO-15 GC/MS FULL SCAN 91102011File Name: Dil. Factor:2.24 Date of Collection: 10/4/23 9:37:00 AM Date of Analysis: 10/20/23 03:05 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.1 Not Detected 5.5 Not DetectedFreon 12 1.1 Not Detected 7.8 Not DetectedFreon 114 11 Not Detected 23 Not DetectedChloromethane 1.1 Not Detected 2.9 Not DetectedVinyl Chloride 1.1 Not Detected 2.5 Not Detected1,3-Butadiene 11 Not Detected 43 Not DetectedBromomethane 4.5 Not Detected 12 Not DetectedChloroethane 1.1 1.8 6.3 10Freon 11 11 Not Detected 21 Not DetectedEthanol 1.1 Not Detected 8.6 Not DetectedFreon 113 1.1 43 4.4 1701,1-Dichloroethene 11 Not Detected 27 Not DetectedAcetone 4.5 Not Detected 11 Not Detected2-Propanol 4.5 Not Detected 14 Not DetectedCarbon Disulfide 4.5 Not Detected 14 Not Detected3-Chloropropene 11 Not Detected 39 Not DetectedMethylene Chloride 4.5 Not Detected 16 Not DetectedMethyl tert-butyl ether 1.1 Not Detected 4.4 Not Detectedtrans-1,2-Dichloroethene 1.1 Not Detected 3.9 Not DetectedHexane 1.1 Not Detected 4.5 Not Detected1,1-Dichloroethane 4.5 Not Detected 13 Not Detected2-Butanone (Methyl Ethyl Ketone) 1.1 Not Detected 4.4 Not Detectedcis-1,2-Dichloroethene 1.1 Not Detected 3.3 Not DetectedTetrahydrofuran 1.1 5.1 5.5 25Chloroform 1.1 1.5 6.1 8.21,1,1-Trichloroethane 1.1 Not Detected 3.8 Not DetectedCyclohexane 1.1 Not Detected 7.0 Not DetectedCarbon Tetrachloride 1.1 Not Detected 5.2 Not Detected2,2,4-Trimethylpentane 1.1 Not Detected 3.6 Not DetectedBenzene 1.1 Not Detected 4.5 Not Detected1,2-Dichloroethane 1.1 Not Detected 4.6 Not DetectedHeptane 1.1 50 6.0 270Trichloroethene 1.1 Not Detected 5.2 Not Detected1,2-Dichloropropane 4.5 Not Detected 16 Not Detected1,4-Dioxane 1.1 Not Detected 7.5 Not DetectedBromodichloromethane 1.1 Not Detected 5.1 Not Detectedcis-1,3-Dichloropropene 1.1 Not Detected 4.6 Not Detected4-Methyl-2-pentanone 2.2 2.2 J 8.4 8.2 JToluene 1.1 Not Detected 5.1 Not Detectedtrans-1,3-Dichloropropene 1.1 Not Detected 6.1 Not Detected1,1,2-Trichloroethane 1.1 Not Detected 7.6 Not DetectedTetrachloroethene 4.5 Not Detected 18 Not Detected2-Hexanone Page 12 of 37 Client Sample ID: SV-02D-10042023 Lab ID#: 2310251-03A EPA METHOD TO-15 GC/MS FULL SCAN 91102011File Name: Dil. Factor:2.24 Date of Collection: 10/4/23 9:37:00 AM Date of Analysis: 10/20/23 03:05 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.1 Not Detected 9.5 Not DetectedDibromochloromethane 1.1 Not Detected 8.6 Not Detected1,2-Dibromoethane (EDB) 1.1 Not Detected 5.2 Not DetectedChlorobenzene 1.1 Not Detected 4.9 Not DetectedEthyl Benzene 2.2 4.3 9.7 19m,p-Xylene 1.1 1.5 4.9 6.6o-Xylene 1.1 Not Detected 4.8 Not DetectedStyrene 1.1 Not Detected 12 Not DetectedBromoform 1.1 Not Detected 5.5 Not DetectedCumene 1.1 Not Detected 7.7 Not Detected1,1,2,2-Tetrachloroethane 1.1 Not Detected 5.5 Not DetectedPropylbenzene 1.1 2.0 5.5 104-Ethyltoluene 1.1 Not Detected 5.5 Not Detected1,3,5-Trimethylbenzene 1.1 3.0 5.5 151,2,4-Trimethylbenzene 1.1 Not Detected 6.7 Not Detected1,3-Dichlorobenzene 1.1 Not Detected 6.7 Not Detected1,4-Dichlorobenzene 1.1 Not Detected 5.8 Not Detectedalpha-Chlorotoluene 1.1 Not Detected 6.7 Not Detected1,2-Dichlorobenzene 4.5 Not Detected 33 Not Detected1,2,4-Trichlorobenzene 4.5 Not Detected 48 Not DetectedHexachlorobutadiene J = Estimated value. Container Type: 1 Liter Summa Canister Limits%RecoverySurrogates Method 97 70-130Toluene-d8 113 70-1301,2-Dichloroethane-d4 101 70-1304-Bromofluorobenzene Page 13 of 37 Client Sample ID: SV-04S-10042023 Lab ID#: 2310251-04A EPA METHOD TO-15 GC/MS FULL SCAN 91102012File Name: Dil. Factor:2.29 Date of Collection: 10/4/23 1:03:00 PM Date of Analysis: 10/20/23 03:30 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.1 Not Detected 5.7 Not DetectedFreon 12 1.1 Not Detected 8.0 Not DetectedFreon 114 11 Not Detected 24 Not DetectedChloromethane 1.1 Not Detected 2.9 Not DetectedVinyl Chloride 1.1 Not Detected 2.5 Not Detected1,3-Butadiene 11 Not Detected 44 Not DetectedBromomethane 4.6 Not Detected 12 Not DetectedChloroethane 1.1 Not Detected 6.4 Not DetectedFreon 11 11 Not Detected 22 Not DetectedEthanol 1.1 Not Detected 8.8 Not DetectedFreon 113 1.1 Not Detected 4.5 Not Detected1,1-Dichloroethene 11 Not Detected 27 Not DetectedAcetone 4.6 Not Detected 11 Not Detected2-Propanol 4.6 Not Detected 14 Not DetectedCarbon Disulfide 4.6 Not Detected 14 Not Detected3-Chloropropene 11 Not Detected 40 Not DetectedMethylene Chloride 4.6 Not Detected 16 Not DetectedMethyl tert-butyl ether 1.1 Not Detected 4.5 Not Detectedtrans-1,2-Dichloroethene 1.1 Not Detected 4.0 Not DetectedHexane 1.1 Not Detected 4.6 Not Detected1,1-Dichloroethane 4.6 Not Detected 14 Not Detected2-Butanone (Methyl Ethyl Ketone) 1.1 Not Detected 4.5 Not Detectedcis-1,2-Dichloroethene 1.1 Not Detected 3.4 Not DetectedTetrahydrofuran 1.1 Not Detected 5.6 Not DetectedChloroform 1.1 Not Detected 6.2 Not Detected1,1,1-Trichloroethane 1.1 Not Detected 3.9 Not DetectedCyclohexane 1.1 Not Detected 7.2 Not DetectedCarbon Tetrachloride 1.1 Not Detected 5.3 Not Detected2,2,4-Trimethylpentane 1.1 Not Detected 3.6 Not DetectedBenzene 1.1 Not Detected 4.6 Not Detected1,2-Dichloroethane 1.1 Not Detected 4.7 Not DetectedHeptane 1.1 Not Detected 6.2 Not DetectedTrichloroethene 1.1 Not Detected 5.3 Not Detected1,2-Dichloropropane 4.6 Not Detected 16 Not Detected1,4-Dioxane 1.1 Not Detected 7.7 Not DetectedBromodichloromethane 1.1 Not Detected 5.2 Not Detectedcis-1,3-Dichloropropene 1.1 Not Detected 4.7 Not Detected4-Methyl-2-pentanone 2.3 Not Detected 8.6 Not DetectedToluene 1.1 Not Detected 5.2 Not Detectedtrans-1,3-Dichloropropene 1.1 Not Detected 6.2 Not Detected1,1,2-Trichloroethane 1.1 Not Detected 7.8 Not DetectedTetrachloroethene 4.6 Not Detected 19 Not Detected2-Hexanone Page 14 of 37 Client Sample ID: SV-04S-10042023 Lab ID#: 2310251-04A EPA METHOD TO-15 GC/MS FULL SCAN 91102012File Name: Dil. Factor:2.29 Date of Collection: 10/4/23 1:03:00 PM Date of Analysis: 10/20/23 03:30 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.1 Not Detected 9.8 Not DetectedDibromochloromethane 1.1 Not Detected 8.8 Not Detected1,2-Dibromoethane (EDB) 1.1 Not Detected 5.3 Not DetectedChlorobenzene 1.1 Not Detected 5.0 Not DetectedEthyl Benzene 2.3 Not Detected 9.9 Not Detectedm,p-Xylene 1.1 Not Detected 5.0 Not Detectedo-Xylene 1.1 Not Detected 4.9 Not DetectedStyrene 1.1 Not Detected 12 Not DetectedBromoform 1.1 Not Detected 5.6 Not DetectedCumene 1.1 Not Detected 7.9 Not Detected1,1,2,2-Tetrachloroethane 1.1 Not Detected 5.6 Not DetectedPropylbenzene 1.1 Not Detected 5.6 Not Detected4-Ethyltoluene 1.1 Not Detected 5.6 Not Detected1,3,5-Trimethylbenzene 1.1 Not Detected 5.6 Not Detected1,2,4-Trimethylbenzene 1.1 Not Detected 6.9 Not Detected1,3-Dichlorobenzene 1.1 Not Detected 6.9 Not Detected1,4-Dichlorobenzene 1.1 Not Detected 5.9 Not Detectedalpha-Chlorotoluene 1.1 Not Detected 6.9 Not Detected1,2-Dichlorobenzene 4.6 Not Detected 34 Not Detected1,2,4-Trichlorobenzene 4.6 Not Detected 49 Not DetectedHexachlorobutadiene Container Type: 1 Liter Summa Canister Limits%RecoverySurrogates Method 96 70-130Toluene-d8 112 70-1301,2-Dichloroethane-d4 102 70-1304-Bromofluorobenzene Page 15 of 37 Client Sample ID: SV-04M-10042023 Lab ID#: 2310251-05A EPA METHOD TO-15 GC/MS FULL SCAN 91102013File Name: Dil. Factor:2.34 Date of Collection: 10/4/23 2:23:00 PM Date of Analysis: 10/20/23 03:55 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.2 Not Detected 5.8 Not DetectedFreon 12 1.2 Not Detected 8.2 Not DetectedFreon 114 12 Not Detected 24 Not DetectedChloromethane 1.2 Not Detected 3.0 Not DetectedVinyl Chloride 1.2 Not Detected 2.6 Not Detected1,3-Butadiene 12 Not Detected 45 Not DetectedBromomethane 4.7 Not Detected 12 Not DetectedChloroethane 1.2 Not Detected 6.6 Not DetectedFreon 11 12 Not Detected 22 Not DetectedEthanol 1.2 Not Detected 9.0 Not DetectedFreon 113 1.2 Not Detected 4.6 Not Detected1,1-Dichloroethene 12 14 28 33Acetone 4.7 Not Detected 12 Not Detected2-Propanol 4.7 Not Detected 14 Not DetectedCarbon Disulfide 4.7 Not Detected 15 Not Detected3-Chloropropene 12 Not Detected 41 Not DetectedMethylene Chloride 4.7 Not Detected 17 Not DetectedMethyl tert-butyl ether 1.2 Not Detected 4.6 Not Detectedtrans-1,2-Dichloroethene 1.2 Not Detected 4.1 Not DetectedHexane 1.2 Not Detected 4.7 Not Detected1,1-Dichloroethane 4.7 Not Detected 14 Not Detected2-Butanone (Methyl Ethyl Ketone) 1.2 Not Detected 4.6 Not Detectedcis-1,2-Dichloroethene 1.2 Not Detected 3.4 Not DetectedTetrahydrofuran 1.2 Not Detected 5.7 Not DetectedChloroform 1.2 Not Detected 6.4 Not Detected1,1,1-Trichloroethane 1.2 Not Detected 4.0 Not DetectedCyclohexane 1.2 Not Detected 7.4 Not DetectedCarbon Tetrachloride 1.2 Not Detected 5.5 Not Detected2,2,4-Trimethylpentane 1.2 Not Detected 3.7 Not DetectedBenzene 1.2 Not Detected 4.7 Not Detected1,2-Dichloroethane 1.2 Not Detected 4.8 Not DetectedHeptane 1.2 2.3 6.3 12Trichloroethene 1.2 Not Detected 5.4 Not Detected1,2-Dichloropropane 4.7 Not Detected 17 Not Detected1,4-Dioxane 1.2 Not Detected 7.8 Not DetectedBromodichloromethane 1.2 Not Detected 5.3 Not Detectedcis-1,3-Dichloropropene 1.2 Not Detected 4.8 Not Detected4-Methyl-2-pentanone 2.3 Not Detected 8.8 Not DetectedToluene 1.2 Not Detected 5.3 Not Detectedtrans-1,3-Dichloropropene 1.2 Not Detected 6.4 Not Detected1,1,2-Trichloroethane 1.2 Not Detected 7.9 Not DetectedTetrachloroethene 4.7 Not Detected 19 Not Detected2-Hexanone Page 16 of 37 Client Sample ID: SV-04M-10042023 Lab ID#: 2310251-05A EPA METHOD TO-15 GC/MS FULL SCAN 91102013File Name: Dil. Factor:2.34 Date of Collection: 10/4/23 2:23:00 PM Date of Analysis: 10/20/23 03:55 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.2 Not Detected 10 Not DetectedDibromochloromethane 1.2 Not Detected 9.0 Not Detected1,2-Dibromoethane (EDB) 1.2 Not Detected 5.4 Not DetectedChlorobenzene 1.2 Not Detected 5.1 Not DetectedEthyl Benzene 2.3 Not Detected 10 Not Detectedm,p-Xylene 1.2 Not Detected 5.1 Not Detectedo-Xylene 1.2 Not Detected 5.0 Not DetectedStyrene 1.2 Not Detected 12 Not DetectedBromoform 1.2 Not Detected 5.8 Not DetectedCumene 1.2 Not Detected 8.0 Not Detected1,1,2,2-Tetrachloroethane 1.2 Not Detected 5.8 Not DetectedPropylbenzene 1.2 Not Detected 5.8 Not Detected4-Ethyltoluene 1.2 Not Detected 5.8 Not Detected1,3,5-Trimethylbenzene 1.2 1.3 5.8 6.31,2,4-Trimethylbenzene 1.2 Not Detected 7.0 Not Detected1,3-Dichlorobenzene 1.2 Not Detected 7.0 Not Detected1,4-Dichlorobenzene 1.2 Not Detected 6.0 Not Detectedalpha-Chlorotoluene 1.2 Not Detected 7.0 Not Detected1,2-Dichlorobenzene 4.7 Not Detected 35 Not Detected1,2,4-Trichlorobenzene 4.7 Not Detected 50 Not DetectedHexachlorobutadiene Container Type: 1 Liter Summa Canister Limits%RecoverySurrogates Method 97 70-130Toluene-d8 113 70-1301,2-Dichloroethane-d4 102 70-1304-Bromofluorobenzene Page 17 of 37 Client Sample ID: SV-04D-10042023 Lab ID#: 2310251-06A EPA METHOD TO-15 GC/MS FULL SCAN 91102014File Name: Dil. Factor:2.52 Date of Collection: 10/4/23 1:45:00 PM Date of Analysis: 10/20/23 04:19 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.3 Not Detected 6.2 Not DetectedFreon 12 1.3 Not Detected 8.8 Not DetectedFreon 114 13 Not Detected 26 Not DetectedChloromethane 1.3 Not Detected 3.2 Not DetectedVinyl Chloride 1.3 Not Detected 2.8 Not Detected1,3-Butadiene 13 Not Detected 49 Not DetectedBromomethane 5.0 Not Detected 13 Not DetectedChloroethane 1.3 Not Detected 7.1 Not DetectedFreon 11 13 Not Detected 24 Not DetectedEthanol 1.3 Not Detected 9.6 Not DetectedFreon 113 1.3 Not Detected 5.0 Not Detected1,1-Dichloroethene 13 23 30 54Acetone 5.0 Not Detected 12 Not Detected2-Propanol 5.0 Not Detected 16 Not DetectedCarbon Disulfide 5.0 Not Detected 16 Not Detected3-Chloropropene 13 Not Detected 44 Not DetectedMethylene Chloride 5.0 Not Detected 18 Not DetectedMethyl tert-butyl ether 1.3 Not Detected 5.0 Not Detectedtrans-1,2-Dichloroethene 1.3 Not Detected 4.4 Not DetectedHexane 1.3 Not Detected 5.1 Not Detected1,1-Dichloroethane 5.0 Not Detected 15 Not Detected2-Butanone (Methyl Ethyl Ketone) 1.3 Not Detected 5.0 Not Detectedcis-1,2-Dichloroethene 1.3 Not Detected 3.7 Not DetectedTetrahydrofuran 1.3 Not Detected 6.2 Not DetectedChloroform 1.3 Not Detected 6.9 Not Detected1,1,1-Trichloroethane 1.3 Not Detected 4.3 Not DetectedCyclohexane 1.3 Not Detected 7.9 Not DetectedCarbon Tetrachloride 1.3 Not Detected 5.9 Not Detected2,2,4-Trimethylpentane 1.3 Not Detected 4.0 Not DetectedBenzene 1.3 Not Detected 5.1 Not Detected1,2-Dichloroethane 1.3 Not Detected 5.2 Not DetectedHeptane 1.3 3.3 6.8 18Trichloroethene 1.3 Not Detected 5.8 Not Detected1,2-Dichloropropane 5.0 Not Detected 18 Not Detected1,4-Dioxane 1.3 Not Detected 8.4 Not DetectedBromodichloromethane 1.3 Not Detected 5.7 Not Detectedcis-1,3-Dichloropropene 1.3 Not Detected 5.2 Not Detected4-Methyl-2-pentanone 2.5 3.1 9.5 12Toluene 1.3 Not Detected 5.7 Not Detectedtrans-1,3-Dichloropropene 1.3 Not Detected 6.9 Not Detected1,1,2-Trichloroethane 1.3 Not Detected 8.5 Not DetectedTetrachloroethene 5.0 Not Detected 21 Not Detected2-Hexanone Page 18 of 37 Client Sample ID: SV-04D-10042023 Lab ID#: 2310251-06A EPA METHOD TO-15 GC/MS FULL SCAN 91102014File Name: Dil. Factor:2.52 Date of Collection: 10/4/23 1:45:00 PM Date of Analysis: 10/20/23 04:19 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.3 Not Detected 11 Not DetectedDibromochloromethane 1.3 Not Detected 9.7 Not Detected1,2-Dibromoethane (EDB) 1.3 Not Detected 5.8 Not DetectedChlorobenzene 1.3 1.4 5.5 6.0Ethyl Benzene 2.5 4.1 11 18m,p-Xylene 1.3 2.2 5.5 9.7o-Xylene 1.3 Not Detected 5.4 Not DetectedStyrene 1.3 Not Detected 13 Not DetectedBromoform 1.3 Not Detected 6.2 Not DetectedCumene 1.3 Not Detected 8.6 Not Detected1,1,2,2-Tetrachloroethane 1.3 Not Detected 6.2 Not DetectedPropylbenzene 1.3 Not Detected 6.2 Not Detected4-Ethyltoluene 1.3 Not Detected 6.2 Not Detected1,3,5-Trimethylbenzene 1.3 Not Detected 6.2 Not Detected1,2,4-Trimethylbenzene 1.3 Not Detected 7.6 Not Detected1,3-Dichlorobenzene 1.3 Not Detected 7.6 Not Detected1,4-Dichlorobenzene 1.3 Not Detected 6.5 Not Detectedalpha-Chlorotoluene 1.3 Not Detected 7.6 Not Detected1,2-Dichlorobenzene 5.0 Not Detected 37 Not Detected1,2,4-Trichlorobenzene 5.0 Not Detected 54 Not DetectedHexachlorobutadiene Container Type: 1 Liter Summa Canister Limits%RecoverySurrogates Method 97 70-130Toluene-d8 113 70-1301,2-Dichloroethane-d4 102 70-1304-Bromofluorobenzene Page 19 of 37 Client Sample ID: SV-03S-10032023 Lab ID#: 2310251-07A EPA METHOD TO-15 GC/MS FULL SCAN 91102022File Name: Dil. Factor:4.29 Date of Collection: 10/3/23 3:42:00 PM Date of Analysis: 10/21/23 08:41 AM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 2.1 Not Detected 11 Not DetectedFreon 12 2.1 Not Detected 15 Not DetectedFreon 114 21 Not Detected 44 Not DetectedChloromethane 2.1 Not Detected 5.5 Not DetectedVinyl Chloride 2.1 Not Detected 4.7 Not Detected1,3-Butadiene 21 Not Detected 83 Not DetectedBromomethane 8.6 Not Detected 23 Not DetectedChloroethane 2.1 Not Detected 12 Not DetectedFreon 11 21 Not Detected 40 Not DetectedEthanol 2.1 Not Detected 16 Not DetectedFreon 113 2.1 150 8.5 5801,1-Dichloroethene 21 Not Detected 51 Not DetectedAcetone 8.6 Not Detected 21 Not Detected2-Propanol 8.6 Not Detected 27 Not DetectedCarbon Disulfide 8.6 Not Detected 27 Not Detected3-Chloropropene 21 Not Detected 74 Not DetectedMethylene Chloride 8.6 Not Detected 31 Not DetectedMethyl tert-butyl ether 2.1 Not Detected 8.5 Not Detectedtrans-1,2-Dichloroethene 2.1 Not Detected 7.6 Not DetectedHexane 2.1 3.0 8.7 121,1-Dichloroethane 8.6 Not Detected 25 Not Detected2-Butanone (Methyl Ethyl Ketone) 2.1 3.9 8.5 15cis-1,2-Dichloroethene 2.1 Not Detected 6.3 Not DetectedTetrahydrofuran 2.1 11 10 55Chloroform 2.1 23 12 1201,1,1-Trichloroethane 2.1 Not Detected 7.4 Not DetectedCyclohexane 2.1 Not Detected 13 Not DetectedCarbon Tetrachloride 2.1 Not Detected 10 Not Detected2,2,4-Trimethylpentane 2.1 Not Detected 6.8 Not DetectedBenzene 2.1 Not Detected 8.7 Not Detected1,2-Dichloroethane 2.1 Not Detected 8.8 Not DetectedHeptane 2.1 550 12 3000Trichloroethene 2.1 Not Detected 9.9 Not Detected1,2-Dichloropropane 8.6 Not Detected 31 Not Detected1,4-Dioxane 2.1 Not Detected 14 Not DetectedBromodichloromethane 2.1 Not Detected 9.7 Not Detectedcis-1,3-Dichloropropene 2.1 Not Detected 8.8 Not Detected4-Methyl-2-pentanone 4.3 Not Detected 16 Not DetectedToluene 2.1 Not Detected 9.7 Not Detectedtrans-1,3-Dichloropropene 2.1 Not Detected 12 Not Detected1,1,2-Trichloroethane 2.1 Not Detected 14 Not DetectedTetrachloroethene 8.6 Not Detected 35 Not Detected2-Hexanone Page 20 of 37 Client Sample ID: SV-03S-10032023 Lab ID#: 2310251-07A EPA METHOD TO-15 GC/MS FULL SCAN 91102022File Name: Dil. Factor:4.29 Date of Collection: 10/3/23 3:42:00 PM Date of Analysis: 10/21/23 08:41 AM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 2.1 Not Detected 18 Not DetectedDibromochloromethane 2.1 Not Detected 16 Not Detected1,2-Dibromoethane (EDB) 2.1 Not Detected 9.9 Not DetectedChlorobenzene 2.1 Not Detected 9.3 Not DetectedEthyl Benzene 4.3 Not Detected 19 Not Detectedm,p-Xylene 2.1 Not Detected 9.3 Not Detectedo-Xylene 2.1 Not Detected 9.1 Not DetectedStyrene 2.1 Not Detected 22 Not DetectedBromoform 2.1 Not Detected 10 Not DetectedCumene 2.1 Not Detected 15 Not Detected1,1,2,2-Tetrachloroethane 2.1 Not Detected 10 Not DetectedPropylbenzene 2.1 Not Detected 10 Not Detected4-Ethyltoluene 2.1 Not Detected 10 Not Detected1,3,5-Trimethylbenzene 2.1 Not Detected 10 Not Detected1,2,4-Trimethylbenzene 2.1 Not Detected 13 Not Detected1,3-Dichlorobenzene 2.1 Not Detected 13 Not Detected1,4-Dichlorobenzene 2.1 Not Detected 11 Not Detectedalpha-Chlorotoluene 2.1 Not Detected 13 Not Detected1,2-Dichlorobenzene 8.6 Not Detected 64 Not Detected1,2,4-Trichlorobenzene 8.6 Not Detected 92 Not DetectedHexachlorobutadiene Container Type: 1 Liter Summa Canister Limits%RecoverySurrogates Method 97 70-130Toluene-d8 112 70-1301,2-Dichloroethane-d4 102 70-1304-Bromofluorobenzene Page 21 of 37 Client Sample ID: SV-03S-10032023-DUP Lab ID#: 2310251-08A EPA METHOD TO-15 GC/MS FULL SCAN 91102023File Name: Dil. Factor:4.38 Date of Collection: 10/3/23 3:42:00 PM Date of Analysis: 10/21/23 09:05 AM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 2.2 Not Detected 11 Not DetectedFreon 12 2.2 Not Detected 15 Not DetectedFreon 114 22 Not Detected 45 Not DetectedChloromethane 2.2 Not Detected 5.6 Not DetectedVinyl Chloride 2.2 Not Detected 4.8 Not Detected1,3-Butadiene 22 Not Detected 85 Not DetectedBromomethane 8.8 Not Detected 23 Not DetectedChloroethane 2.2 Not Detected 12 Not DetectedFreon 11 22 26 41 49Ethanol 2.2 Not Detected 17 Not DetectedFreon 113 2.2 150 8.7 6001,1-Dichloroethene 22 24 52 56Acetone 8.8 Not Detected 22 Not Detected2-Propanol 8.8 Not Detected 27 Not DetectedCarbon Disulfide 8.8 Not Detected 27 Not Detected3-Chloropropene 22 Not Detected 76 Not DetectedMethylene Chloride 8.8 Not Detected 32 Not DetectedMethyl tert-butyl ether 2.2 Not Detected 8.7 Not Detectedtrans-1,2-Dichloroethene 2.2 Not Detected 7.7 Not DetectedHexane 2.2 3.0 8.9 121,1-Dichloroethane 8.8 Not Detected 26 Not Detected2-Butanone (Methyl Ethyl Ketone) 2.2 4.1 8.7 16cis-1,2-Dichloroethene 2.2 Not Detected 6.4 Not DetectedTetrahydrofuran 2.2 11 11 56Chloroform 2.2 24 12 1301,1,1-Trichloroethane 2.2 Not Detected 7.5 Not DetectedCyclohexane 2.2 Not Detected 14 Not DetectedCarbon Tetrachloride 2.2 Not Detected 10 Not Detected2,2,4-Trimethylpentane 2.2 Not Detected 7.0 Not DetectedBenzene 2.2 Not Detected 8.9 Not Detected1,2-Dichloroethane 2.2 Not Detected 9.0 Not DetectedHeptane 2.2 560 12 3000Trichloroethene 2.2 Not Detected 10 Not Detected1,2-Dichloropropane 8.8 Not Detected 32 Not Detected1,4-Dioxane 2.2 Not Detected 15 Not DetectedBromodichloromethane 2.2 Not Detected 9.9 Not Detectedcis-1,3-Dichloropropene 2.2 Not Detected 9.0 Not Detected4-Methyl-2-pentanone 4.4 Not Detected 16 Not DetectedToluene 2.2 Not Detected 9.9 Not Detectedtrans-1,3-Dichloropropene 2.2 Not Detected 12 Not Detected1,1,2-Trichloroethane 2.2 Not Detected 15 Not DetectedTetrachloroethene 8.8 Not Detected 36 Not Detected2-Hexanone Page 22 of 37 Client Sample ID: SV-03S-10032023-DUP Lab ID#: 2310251-08A EPA METHOD TO-15 GC/MS FULL SCAN 91102023File Name: Dil. Factor:4.38 Date of Collection: 10/3/23 3:42:00 PM Date of Analysis: 10/21/23 09:05 AM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 2.2 Not Detected 19 Not DetectedDibromochloromethane 2.2 Not Detected 17 Not Detected1,2-Dibromoethane (EDB) 2.2 Not Detected 10 Not DetectedChlorobenzene 2.2 Not Detected 9.5 Not DetectedEthyl Benzene 4.4 Not Detected 19 Not Detectedm,p-Xylene 2.2 Not Detected 9.5 Not Detectedo-Xylene 2.2 Not Detected 9.3 Not DetectedStyrene 2.2 Not Detected 23 Not DetectedBromoform 2.2 Not Detected 11 Not DetectedCumene 2.2 Not Detected 15 Not Detected1,1,2,2-Tetrachloroethane 2.2 Not Detected 11 Not DetectedPropylbenzene 2.2 Not Detected 11 Not Detected4-Ethyltoluene 2.2 Not Detected 11 Not Detected1,3,5-Trimethylbenzene 2.2 Not Detected 11 Not Detected1,2,4-Trimethylbenzene 2.2 Not Detected 13 Not Detected1,3-Dichlorobenzene 2.2 Not Detected 13 Not Detected1,4-Dichlorobenzene 2.2 Not Detected 11 Not Detectedalpha-Chlorotoluene 2.2 Not Detected 13 Not Detected1,2-Dichlorobenzene 8.8 Not Detected 65 Not Detected1,2,4-Trichlorobenzene 8.8 Not Detected 93 Not DetectedHexachlorobutadiene Container Type: 1 Liter Summa Canister Limits%RecoverySurrogates Method 97 70-130Toluene-d8 112 70-1301,2-Dichloroethane-d4 103 70-1304-Bromofluorobenzene Page 23 of 37 Client Sample ID: SV-03M-10032023 Lab ID#: 2310251-09A EPA METHOD TO-15 GC/MS FULL SCAN 91102024File Name: Dil. Factor:11.4 Date of Collection: 10/3/23 4:37:00 PM Date of Analysis: 10/21/23 09:28 AM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 5.7 Not Detected 28 Not DetectedFreon 12 5.7 Not Detected 40 Not DetectedFreon 114 57 Not Detected 120 Not DetectedChloromethane 5.7 Not Detected 14 Not DetectedVinyl Chloride 5.7 Not Detected 13 Not Detected1,3-Butadiene 57 Not Detected 220 Not DetectedBromomethane 23 Not Detected 60 Not DetectedChloroethane 5.7 Not Detected 32 Not DetectedFreon 11 57 Not Detected 110 Not DetectedEthanol 5.7 Not Detected 44 Not DetectedFreon 113 5.7 490 23 20001,1-Dichloroethene 57 Not Detected 140 Not DetectedAcetone 23 Not Detected 56 Not Detected2-Propanol 23 Not Detected 71 Not DetectedCarbon Disulfide 23 Not Detected 71 Not Detected3-Chloropropene 57 Not Detected 200 Not DetectedMethylene Chloride 23 Not Detected 82 Not DetectedMethyl tert-butyl ether 5.7 Not Detected 22 Not Detectedtrans-1,2-Dichloroethene 5.7 Not Detected 20 Not DetectedHexane 5.7 10 23 421,1-Dichloroethane 23 Not Detected 67 Not Detected2-Butanone (Methyl Ethyl Ketone) 5.7 19 22 75cis-1,2-Dichloroethene 5.7 Not Detected 17 Not DetectedTetrahydrofuran 5.7 17 28 82Chloroform 5.7 53 31 2901,1,1-Trichloroethane 5.7 Not Detected 20 Not DetectedCyclohexane 5.7 Not Detected 36 Not DetectedCarbon Tetrachloride 5.7 Not Detected 27 Not Detected2,2,4-Trimethylpentane 5.7 Not Detected 18 Not DetectedBenzene 5.7 Not Detected 23 Not Detected1,2-Dichloroethane 5.7 Not Detected 23 Not DetectedHeptane 5.7 1500 31 8200Trichloroethene 5.7 Not Detected 26 Not Detected1,2-Dichloropropane 23 Not Detected 82 Not Detected1,4-Dioxane 5.7 Not Detected 38 Not DetectedBromodichloromethane 5.7 Not Detected 26 Not Detectedcis-1,3-Dichloropropene 5.7 Not Detected 23 Not Detected4-Methyl-2-pentanone 11 Not Detected 43 Not DetectedToluene 5.7 Not Detected 26 Not Detectedtrans-1,3-Dichloropropene 5.7 Not Detected 31 Not Detected1,1,2-Trichloroethane 5.7 Not Detected 39 Not DetectedTetrachloroethene 23 Not Detected 93 Not Detected2-Hexanone Page 24 of 37 Client Sample ID: SV-03M-10032023 Lab ID#: 2310251-09A EPA METHOD TO-15 GC/MS FULL SCAN 91102024File Name: Dil. Factor:11.4 Date of Collection: 10/3/23 4:37:00 PM Date of Analysis: 10/21/23 09:28 AM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 5.7 Not Detected 48 Not DetectedDibromochloromethane 5.7 Not Detected 44 Not Detected1,2-Dibromoethane (EDB) 5.7 Not Detected 26 Not DetectedChlorobenzene 5.7 Not Detected 25 Not DetectedEthyl Benzene 11 Not Detected 50 Not Detectedm,p-Xylene 5.7 Not Detected 25 Not Detectedo-Xylene 5.7 Not Detected 24 Not DetectedStyrene 5.7 Not Detected 59 Not DetectedBromoform 5.7 Not Detected 28 Not DetectedCumene 5.7 Not Detected 39 Not Detected1,1,2,2-Tetrachloroethane 5.7 Not Detected 28 Not DetectedPropylbenzene 5.7 Not Detected 28 Not Detected4-Ethyltoluene 5.7 Not Detected 28 Not Detected1,3,5-Trimethylbenzene 5.7 5.8 28 281,2,4-Trimethylbenzene 5.7 Not Detected 34 Not Detected1,3-Dichlorobenzene 5.7 Not Detected 34 Not Detected1,4-Dichlorobenzene 5.7 Not Detected 30 Not Detectedalpha-Chlorotoluene 5.7 Not Detected 34 Not Detected1,2-Dichlorobenzene 23 Not Detected 170 Not Detected1,2,4-Trichlorobenzene 23 Not Detected 240 Not DetectedHexachlorobutadiene Container Type: 1 Liter Summa Canister Limits%RecoverySurrogates Method 102 70-130Toluene-d8 115 70-1301,2-Dichloroethane-d4 104 70-1304-Bromofluorobenzene Page 25 of 37 Client Sample ID: SV-01S-10032023 Lab ID#: 2310251-10A EPA METHOD TO-15 GC/MS FULL SCAN 91102018File Name: Dil. Factor:2.34 Date of Collection: 10/3/23 11:17:00 AM Date of Analysis: 10/20/23 05:53 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.2 Not Detected 5.8 Not DetectedFreon 12 1.2 Not Detected 8.2 Not DetectedFreon 114 12 Not Detected 24 Not DetectedChloromethane 1.2 Not Detected 3.0 Not DetectedVinyl Chloride 1.2 Not Detected 2.6 Not Detected1,3-Butadiene 12 Not Detected 45 Not DetectedBromomethane 4.7 Not Detected 12 Not DetectedChloroethane 1.2 Not Detected 6.6 Not DetectedFreon 11 12 Not Detected 22 Not DetectedEthanol 1.2 Not Detected 9.0 Not DetectedFreon 113 1.2 Not Detected 4.6 Not Detected1,1-Dichloroethene 12 Not Detected 28 Not DetectedAcetone 4.7 Not Detected 12 Not Detected2-Propanol 4.7 Not Detected 14 Not DetectedCarbon Disulfide 4.7 Not Detected 15 Not Detected3-Chloropropene 12 Not Detected 41 Not DetectedMethylene Chloride 4.7 Not Detected 17 Not DetectedMethyl tert-butyl ether 1.2 Not Detected 4.6 Not Detectedtrans-1,2-Dichloroethene 1.2 Not Detected 4.1 Not DetectedHexane 1.2 Not Detected 4.7 Not Detected1,1-Dichloroethane 4.7 Not Detected 14 Not Detected2-Butanone (Methyl Ethyl Ketone) 1.2 Not Detected 4.6 Not Detectedcis-1,2-Dichloroethene 1.2 Not Detected 3.4 Not DetectedTetrahydrofuran 1.2 1.8 5.7 8.7Chloroform 1.2 Not Detected 6.4 Not Detected1,1,1-Trichloroethane 1.2 Not Detected 4.0 Not DetectedCyclohexane 1.2 Not Detected 7.4 Not DetectedCarbon Tetrachloride 1.2 Not Detected 5.5 Not Detected2,2,4-Trimethylpentane 1.2 Not Detected 3.7 Not DetectedBenzene 1.2 Not Detected 4.7 Not Detected1,2-Dichloroethane 1.2 Not Detected 4.8 Not DetectedHeptane 1.2 13 6.3 69Trichloroethene 1.2 Not Detected 5.4 Not Detected1,2-Dichloropropane 4.7 Not Detected 17 Not Detected1,4-Dioxane 1.2 Not Detected 7.8 Not DetectedBromodichloromethane 1.2 Not Detected 5.3 Not Detectedcis-1,3-Dichloropropene 1.2 Not Detected 4.8 Not Detected4-Methyl-2-pentanone 2.3 Not Detected 8.8 Not DetectedToluene 1.2 Not Detected 5.3 Not Detectedtrans-1,3-Dichloropropene 1.2 Not Detected 6.4 Not Detected1,1,2-Trichloroethane 1.2 Not Detected 7.9 Not DetectedTetrachloroethene 4.7 Not Detected 19 Not Detected2-Hexanone Page 26 of 37 Client Sample ID: SV-01S-10032023 Lab ID#: 2310251-10A EPA METHOD TO-15 GC/MS FULL SCAN 91102018File Name: Dil. Factor:2.34 Date of Collection: 10/3/23 11:17:00 AM Date of Analysis: 10/20/23 05:53 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.2 Not Detected 10 Not DetectedDibromochloromethane 1.2 Not Detected 9.0 Not Detected1,2-Dibromoethane (EDB) 1.2 Not Detected 5.4 Not DetectedChlorobenzene 1.2 Not Detected 5.1 Not DetectedEthyl Benzene 2.3 Not Detected 10 Not Detectedm,p-Xylene 1.2 Not Detected 5.1 Not Detectedo-Xylene 1.2 Not Detected 5.0 Not DetectedStyrene 1.2 Not Detected 12 Not DetectedBromoform 1.2 Not Detected 5.8 Not DetectedCumene 1.2 Not Detected 8.0 Not Detected1,1,2,2-Tetrachloroethane 1.2 Not Detected 5.8 Not DetectedPropylbenzene 1.2 Not Detected 5.8 Not Detected4-Ethyltoluene 1.2 Not Detected 5.8 Not Detected1,3,5-Trimethylbenzene 1.2 Not Detected 5.8 Not Detected1,2,4-Trimethylbenzene 1.2 Not Detected 7.0 Not Detected1,3-Dichlorobenzene 1.2 Not Detected 7.0 Not Detected1,4-Dichlorobenzene 1.2 Not Detected 6.0 Not Detectedalpha-Chlorotoluene 1.2 Not Detected 7.0 Not Detected1,2-Dichlorobenzene 4.7 Not Detected 35 Not Detected1,2,4-Trichlorobenzene 4.7 Not Detected 50 Not DetectedHexachlorobutadiene Container Type: 1 Liter Summa Canister Limits%RecoverySurrogates Method 98 70-130Toluene-d8 113 70-1301,2-Dichloroethane-d4 104 70-1304-Bromofluorobenzene Page 27 of 37 Client Sample ID: SV-01D-10032023 Lab ID#: 2310251-11A EPA METHOD TO-15 GC/MS FULL SCAN 91102019File Name: Dil. Factor:2.36 Date of Collection: 10/3/23 2:04:00 PM Date of Analysis: 10/20/23 06:19 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.2 Not Detected 5.8 Not DetectedFreon 12 1.2 Not Detected 8.2 Not DetectedFreon 114 12 Not Detected 24 Not DetectedChloromethane 1.2 Not Detected 3.0 Not DetectedVinyl Chloride 1.2 Not Detected 2.6 Not Detected1,3-Butadiene 12 Not Detected 46 Not DetectedBromomethane 4.7 Not Detected 12 Not DetectedChloroethane 1.2 Not Detected 6.6 Not DetectedFreon 11 12 Not Detected 22 Not DetectedEthanol 1.2 Not Detected 9.0 Not DetectedFreon 113 1.2 2.8 4.7 111,1-Dichloroethene 12 Not Detected 28 Not DetectedAcetone 4.7 Not Detected 12 Not Detected2-Propanol 4.7 Not Detected 15 Not DetectedCarbon Disulfide 4.7 Not Detected 15 Not Detected3-Chloropropene 12 Not Detected 41 Not DetectedMethylene Chloride 4.7 Not Detected 17 Not DetectedMethyl tert-butyl ether 1.2 Not Detected 4.7 Not Detectedtrans-1,2-Dichloroethene 1.2 Not Detected 4.2 Not DetectedHexane 1.2 Not Detected 4.8 Not Detected1,1-Dichloroethane 4.7 Not Detected 14 Not Detected2-Butanone (Methyl Ethyl Ketone) 1.2 Not Detected 4.7 Not Detectedcis-1,2-Dichloroethene 1.2 Not Detected 3.5 Not DetectedTetrahydrofuran 1.2 2.6 5.8 12Chloroform 1.2 Not Detected 6.4 Not Detected1,1,1-Trichloroethane 1.2 Not Detected 4.1 Not DetectedCyclohexane 1.2 Not Detected 7.4 Not DetectedCarbon Tetrachloride 1.2 Not Detected 5.5 Not Detected2,2,4-Trimethylpentane 1.2 Not Detected 3.8 Not DetectedBenzene 1.2 Not Detected 4.8 Not Detected1,2-Dichloroethane 1.2 Not Detected 4.8 Not DetectedHeptane 1.2 22 6.3 120Trichloroethene 1.2 Not Detected 5.4 Not Detected1,2-Dichloropropane 4.7 Not Detected 17 Not Detected1,4-Dioxane 1.2 Not Detected 7.9 Not DetectedBromodichloromethane 1.2 Not Detected 5.4 Not Detectedcis-1,3-Dichloropropene 1.2 Not Detected 4.8 Not Detected4-Methyl-2-pentanone 2.4 Not Detected 8.9 Not DetectedToluene 1.2 Not Detected 5.4 Not Detectedtrans-1,3-Dichloropropene 1.2 Not Detected 6.4 Not Detected1,1,2-Trichloroethane 1.2 1.2 8.0 8.0Tetrachloroethene 4.7 Not Detected 19 Not Detected2-Hexanone Page 28 of 37 Client Sample ID: SV-01D-10032023 Lab ID#: 2310251-11A EPA METHOD TO-15 GC/MS FULL SCAN 91102019File Name: Dil. Factor:2.36 Date of Collection: 10/3/23 2:04:00 PM Date of Analysis: 10/20/23 06:19 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 1.2 Not Detected 10 Not DetectedDibromochloromethane 1.2 Not Detected 9.1 Not Detected1,2-Dibromoethane (EDB) 1.2 Not Detected 5.4 Not DetectedChlorobenzene 1.2 Not Detected 5.1 Not DetectedEthyl Benzene 2.4 Not Detected 10 Not Detectedm,p-Xylene 1.2 Not Detected 5.1 Not Detectedo-Xylene 1.2 Not Detected 5.0 Not DetectedStyrene 1.2 Not Detected 12 Not DetectedBromoform 1.2 Not Detected 5.8 Not DetectedCumene 1.2 Not Detected 8.1 Not Detected1,1,2,2-Tetrachloroethane 1.2 Not Detected 5.8 Not DetectedPropylbenzene 1.2 Not Detected 5.8 Not Detected4-Ethyltoluene 1.2 Not Detected 5.8 Not Detected1,3,5-Trimethylbenzene 1.2 Not Detected 5.8 Not Detected1,2,4-Trimethylbenzene 1.2 Not Detected 7.1 Not Detected1,3-Dichlorobenzene 1.2 Not Detected 7.1 Not Detected1,4-Dichlorobenzene 1.2 Not Detected 6.1 Not Detectedalpha-Chlorotoluene 1.2 Not Detected 7.1 Not Detected1,2-Dichlorobenzene 4.7 Not Detected 35 Not Detected1,2,4-Trichlorobenzene 4.7 Not Detected 50 Not DetectedHexachlorobutadiene Container Type: 1 Liter Summa Canister Limits%RecoverySurrogates Method 98 70-130Toluene-d8 113 70-1301,2-Dichloroethane-d4 103 70-1304-Bromofluorobenzene Page 29 of 37 Client Sample ID: Lab Blank Lab ID#: 2310251-12A EPA METHOD TO-15 GC/MS FULL SCAN 91102008File Name: Dil. Factor:1.00 Date of Collection: NA Date of Analysis: 10/20/23 12:44 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 0.50 Not Detected 2.5 Not DetectedFreon 12 0.50 Not Detected 3.5 Not DetectedFreon 114 5.0 Not Detected 10 Not DetectedChloromethane 0.50 Not Detected 1.3 Not DetectedVinyl Chloride 0.50 Not Detected 1.1 Not Detected1,3-Butadiene 5.0 Not Detected 19 Not DetectedBromomethane 2.0 Not Detected 5.3 Not DetectedChloroethane 0.50 Not Detected 2.8 Not DetectedFreon 11 5.0 Not Detected 9.4 Not DetectedEthanol 0.50 Not Detected 3.8 Not DetectedFreon 113 0.50 Not Detected 2.0 Not Detected1,1-Dichloroethene 5.0 Not Detected 12 Not DetectedAcetone 2.0 Not Detected 4.9 Not Detected2-Propanol 2.0 Not Detected 6.2 Not DetectedCarbon Disulfide 2.0 Not Detected 6.3 Not Detected3-Chloropropene 5.0 Not Detected 17 Not DetectedMethylene Chloride 2.0 Not Detected 7.2 Not DetectedMethyl tert-butyl ether 0.50 Not Detected 2.0 Not Detectedtrans-1,2-Dichloroethene 0.50 Not Detected 1.8 Not DetectedHexane 0.50 Not Detected 2.0 Not Detected1,1-Dichloroethane 2.0 Not Detected 5.9 Not Detected2-Butanone (Methyl Ethyl Ketone) 0.50 Not Detected 2.0 Not Detectedcis-1,2-Dichloroethene 0.50 Not Detected 1.5 Not DetectedTetrahydrofuran 0.50 Not Detected 2.4 Not DetectedChloroform 0.50 Not Detected 2.7 Not Detected1,1,1-Trichloroethane 0.50 Not Detected 1.7 Not DetectedCyclohexane 0.50 Not Detected 3.1 Not DetectedCarbon Tetrachloride 0.50 Not Detected 2.3 Not Detected2,2,4-Trimethylpentane 0.50 Not Detected 1.6 Not DetectedBenzene 0.50 Not Detected 2.0 Not Detected1,2-Dichloroethane 0.50 Not Detected 2.0 Not DetectedHeptane 0.50 Not Detected 2.7 Not DetectedTrichloroethene 0.50 Not Detected 2.3 Not Detected1,2-Dichloropropane 2.0 Not Detected 7.2 Not Detected1,4-Dioxane 0.50 Not Detected 3.4 Not DetectedBromodichloromethane 0.50 Not Detected 2.3 Not Detectedcis-1,3-Dichloropropene 0.50 Not Detected 2.0 Not Detected4-Methyl-2-pentanone 1.0 Not Detected 3.8 Not DetectedToluene 0.50 Not Detected 2.3 Not Detectedtrans-1,3-Dichloropropene 0.50 Not Detected 2.7 Not Detected1,1,2-Trichloroethane 0.50 Not Detected 3.4 Not DetectedTetrachloroethene 2.0 Not Detected 8.2 Not Detected2-Hexanone Page 30 of 37 Client Sample ID: Lab Blank Lab ID#: 2310251-12A EPA METHOD TO-15 GC/MS FULL SCAN 91102008File Name: Dil. Factor:1.00 Date of Collection: NA Date of Analysis: 10/20/23 12:44 PM (ug/m3)(ug/m3)(ppbv)(ppbv)Compound AmountRpt. LimitAmountRpt. Limit 0.50 Not Detected 4.2 Not DetectedDibromochloromethane 0.50 Not Detected 3.8 Not Detected1,2-Dibromoethane (EDB) 0.50 Not Detected 2.3 Not DetectedChlorobenzene 0.50 Not Detected 2.2 Not DetectedEthyl Benzene 1.0 Not Detected 4.3 Not Detectedm,p-Xylene 0.50 Not Detected 2.2 Not Detectedo-Xylene 0.50 Not Detected 2.1 Not DetectedStyrene 0.50 Not Detected 5.2 Not DetectedBromoform 0.50 Not Detected 2.4 Not DetectedCumene 0.50 Not Detected 3.4 Not Detected1,1,2,2-Tetrachloroethane 0.50 Not Detected 2.4 Not DetectedPropylbenzene 0.50 Not Detected 2.4 Not Detected4-Ethyltoluene 0.50 Not Detected 2.4 Not Detected1,3,5-Trimethylbenzene 0.50 Not Detected 2.4 Not Detected1,2,4-Trimethylbenzene 0.50 Not Detected 3.0 Not Detected1,3-Dichlorobenzene 0.50 Not Detected 3.0 Not Detected1,4-Dichlorobenzene 0.50 Not Detected 2.6 Not Detectedalpha-Chlorotoluene 0.50 Not Detected 3.0 Not Detected1,2-Dichlorobenzene 2.0 Not Detected 15 Not Detected1,2,4-Trichlorobenzene 2.0 Not Detected 21 Not DetectedHexachlorobutadiene Container Type: NA - Not Applicable Limits%RecoverySurrogates Method 99 70-130Toluene-d8 115 70-1301,2-Dichloroethane-d4 102 70-1304-Bromofluorobenzene Page 31 of 37 Client Sample ID: CCV Lab ID#: 2310251-13A EPA METHOD TO-15 GC/MS FULL SCAN 91102005File Name: Dil. Factor:1.00 Date of Collection: NA Date of Analysis: 10/20/23 11:33 AM %RecoveryCompound 109Freon 12 103Freon 114 112Chloromethane 119Vinyl Chloride 1141,3-Butadiene 96Bromomethane 111Chloroethane 102Freon 11 105Ethanol 105Freon 113 1051,1-Dichloroethene 106Acetone 1072-Propanol 110Carbon Disulfide 1083-Chloropropene 114Methylene Chloride 108Methyl tert-butyl ether 103trans-1,2-Dichloroethene 112Hexane 1101,1-Dichloroethane 1112-Butanone (Methyl Ethyl Ketone) 101cis-1,2-Dichloroethene 104Tetrahydrofuran 102Chloroform 971,1,1-Trichloroethane 108Cyclohexane 98Carbon Tetrachloride 1102,2,4-Trimethylpentane 105Benzene 1051,2-Dichloroethane 112Heptane 97Trichloroethene 1101,2-Dichloropropane 1011,4-Dioxane 102Bromodichloromethane 104cis-1,3-Dichloropropene 1084-Methyl-2-pentanone 101Toluene 103trans-1,3-Dichloropropene 991,1,2-Trichloroethane 103Tetrachloroethene 1152-Hexanone Page 32 of 37 Client Sample ID: CCV Lab ID#: 2310251-13A EPA METHOD TO-15 GC/MS FULL SCAN 91102005File Name: Dil. Factor:1.00 Date of Collection: NA Date of Analysis: 10/20/23 11:33 AM %RecoveryCompound 100Dibromochloromethane 1081,2-Dibromoethane (EDB) 103Chlorobenzene 105Ethyl Benzene 101m,p-Xylene 101o-Xylene 98Styrene 98Bromoform 98Cumene 1031,1,2,2-Tetrachloroethane 101Propylbenzene 1004-Ethyltoluene 961,3,5-Trimethylbenzene 941,2,4-Trimethylbenzene 991,3-Dichlorobenzene 961,4-Dichlorobenzene 93alpha-Chlorotoluene 981,2-Dichlorobenzene 1001,2,4-Trichlorobenzene 105Hexachlorobutadiene Container Type: NA - Not Applicable Limits%RecoverySurrogates Method 99 70-130Toluene-d8 102 70-1301,2-Dichloroethane-d4 96 70-1304-Bromofluorobenzene Page 33 of 37 Client Sample ID: LCS Lab ID#: 2310251-14A EPA METHOD TO-15 GC/MS FULL SCAN 91102006File Name: Dil. Factor:1.00 Date of Collection: NA Date of Analysis: 10/20/23 11:57 AM Limits%RecoveryCompound Method 103 70-130Freon 12 99 70-130Freon 114 106 70-130Chloromethane 114 70-130Vinyl Chloride 109 70-1301,3-Butadiene 94 70-130Bromomethane 102 70-130Chloroethane 98 70-130Freon 11 127 70-130Ethanol 99 70-130Freon 113 97 70-1301,1-Dichloroethene 106 70-130Acetone 115 70-1302-Propanol 108 70-130Carbon Disulfide 103 70-1303-Chloropropene 108 70-130Methylene Chloride 106 70-130Methyl tert-butyl ether 100 70-130trans-1,2-Dichloroethene 108 70-130Hexane 108 70-1301,1-Dichloroethane 111 70-1302-Butanone (Methyl Ethyl Ketone) 98 70-130cis-1,2-Dichloroethene 112 70-130Tetrahydrofuran 99 70-130Chloroform 96 70-1301,1,1-Trichloroethane 107 70-130Cyclohexane 97 70-130Carbon Tetrachloride 111 70-1302,2,4-Trimethylpentane 104 70-130Benzene 103 70-1301,2-Dichloroethane 112 70-130Heptane 95 70-130Trichloroethene 106 70-1301,2-Dichloropropane 106 70-1301,4-Dioxane 98 70-130Bromodichloromethane 103 70-130cis-1,3-Dichloropropene 111 70-1304-Methyl-2-pentanone 97 70-130Toluene 98 70-130trans-1,3-Dichloropropene 98 70-1301,1,2-Trichloroethane 101 70-130Tetrachloroethene 114 70-1302-Hexanone Page 34 of 37 Client Sample ID: LCS Lab ID#: 2310251-14A EPA METHOD TO-15 GC/MS FULL SCAN 91102006File Name: Dil. Factor:1.00 Date of Collection: NA Date of Analysis: 10/20/23 11:57 AM Limits%RecoveryCompound Method 97 70-130Dibromochloromethane 97 70-1301,2-Dibromoethane (EDB) 102 70-130Chlorobenzene 105 70-130Ethyl Benzene 100 70-130m,p-Xylene 100 70-130o-Xylene 98 70-130Styrene 95 70-130Bromoform 96 70-130Cumene 103 70-1301,1,2,2-Tetrachloroethane 100 70-130Propylbenzene 98 70-1304-Ethyltoluene 96 70-1301,3,5-Trimethylbenzene 94 70-1301,2,4-Trimethylbenzene 98 70-1301,3-Dichlorobenzene 95 70-1301,4-Dichlorobenzene 91 70-130alpha-Chlorotoluene 96 70-1301,2-Dichlorobenzene 99 70-1301,2,4-Trichlorobenzene 108 70-130Hexachlorobutadiene Container Type: NA - Not Applicable Limits%RecoverySurrogates Method 100 70-130Toluene-d8 102 70-1301,2-Dichloroethane-d4 97 70-1304-Bromofluorobenzene Page 35 of 37 Client Sample ID: LCSD Lab ID#: 2310251-14AA EPA METHOD TO-15 GC/MS FULL SCAN 91102007File Name: Dil. Factor:1.00 Date of Collection: NA Date of Analysis: 10/20/23 12:20 PM Limits%RecoveryCompound Method 104 70-130Freon 12 98 70-130Freon 114 105 70-130Chloromethane 112 70-130Vinyl Chloride 109 70-1301,3-Butadiene 93 70-130Bromomethane 103 70-130Chloroethane 98 70-130Freon 11 128 70-130Ethanol 99 70-130Freon 113 97 70-1301,1-Dichloroethene 104 70-130Acetone 114 70-1302-Propanol 107 70-130Carbon Disulfide 103 70-1303-Chloropropene 107 70-130Methylene Chloride 106 70-130Methyl tert-butyl ether 100 70-130trans-1,2-Dichloroethene 106 70-130Hexane 108 70-1301,1-Dichloroethane 110 70-1302-Butanone (Methyl Ethyl Ketone) 99 70-130cis-1,2-Dichloroethene 111 70-130Tetrahydrofuran 98 70-130Chloroform 94 70-1301,1,1-Trichloroethane 107 70-130Cyclohexane 97 70-130Carbon Tetrachloride 111 70-1302,2,4-Trimethylpentane 103 70-130Benzene 103 70-1301,2-Dichloroethane 111 70-130Heptane 94 70-130Trichloroethene 106 70-1301,2-Dichloropropane 108 70-1301,4-Dioxane 100 70-130Bromodichloromethane 103 70-130cis-1,3-Dichloropropene 111 70-1304-Methyl-2-pentanone 98 70-130Toluene 100 70-130trans-1,3-Dichloropropene 98 70-1301,1,2-Trichloroethane 101 70-130Tetrachloroethene 114 70-1302-Hexanone Page 36 of 37 Client Sample ID: LCSD Lab ID#: 2310251-14AA EPA METHOD TO-15 GC/MS FULL SCAN 91102007File Name: Dil. Factor:1.00 Date of Collection: NA Date of Analysis: 10/20/23 12:20 PM Limits%RecoveryCompound Method 97 70-130Dibromochloromethane 108 70-1301,2-Dibromoethane (EDB) 104 70-130Chlorobenzene 106 70-130Ethyl Benzene 99 70-130m,p-Xylene 102 70-130o-Xylene 100 70-130Styrene 96 70-130Bromoform 97 70-130Cumene 103 70-1301,1,2,2-Tetrachloroethane 100 70-130Propylbenzene 99 70-1304-Ethyltoluene 96 70-1301,3,5-Trimethylbenzene 95 70-1301,2,4-Trimethylbenzene 99 70-1301,3-Dichlorobenzene 96 70-1301,4-Dichlorobenzene 91 70-130alpha-Chlorotoluene 98 70-1301,2-Dichlorobenzene 99 70-1301,2,4-Trichlorobenzene 110 70-130Hexachlorobutadiene Container Type: NA - Not Applicable Limits%RecoverySurrogates Method 100 70-130Toluene-d8 102 70-1301,2-Dichloroethane-d4 97 70-1304-Bromofluorobenzene Page 37 of 37 ATTACHMENT F DATA VALIDATION REPORT 180A Market Place Blvd. Knoxville, TN 37922 PH 865.330.0037 www.geosyntec.com Soil Vapor Evaluation 2310251 DVR.docx Final Review: K Henderson 11/11/2023 Memorandum Date: 10 November 2023 To: Brian Smith From: Jen Pinion CC: Kris Henderson Subject: Stage 2A Data Validation - Level II Data Deliverable, Eurofins Air Toxics Workorder # 2310251 SITE: Soil Vapor Evaluation INTRODUCTION This report summarizes the findings of the Stage 2A data validation of ten air samples and one field duplicate sample, collected 3-4 October 2023, as part of the Soil Vapor Evaluation sampling event. The analyses were performed at Eurofins Air Toxics, LLC, Folsom, California. The samples were analyzed for the following test:  Volatile Organic Compounds (VOCs) in Ambient Air by United States Environmental Protection Agency (US EPA) Method TO-15 using Full Scan EXECUTIVE SUMMARY Overall, based on this Stage 2A data validation covering the quality control (QC) parameters listed below and the information provided, the data as qualified are usable for supporting project objectives. The qualified data should be used within the limitations of the qualifications. The data were reviewed based on professional and technical judgment and the following documents:  US EPA Contract Laboratory Program National Functional Guidelines for Organic Superfund Methods Data Review, November 2020 (EPA 540-R-20-005); and,  The pertinent methods referenced by the data package. The following samples were analyzed and validated at a Stage 2A level: Client IDs Laboratory IDs SV-02S-10042023 2310251-01A SV-02M-10042023 2310251-02A SV-02D-10042023 2310251-03A Client IDs Laboratory IDs SV-04S-10042023 2310251-04A SV-04M-10042023 2310251-05A SV-04D-10042023 2310251-06A Soil Vapor Evaluation Data Validation 10 November 2023 Page 2 Soil Vapor Evaluation 2310251 DVR.docx Final Review: K Henderson 11/11/2023 Client IDs Laboratory IDs SV-03S-10032023 2310251-07A SV-03S-10032023-DUP 2310251-08A SV-03M-10032023 2310251-09A Client IDs Laboratory IDs SV-01S-10032023 2310251-10A SV-01D-10032023 2310251-11A Incorrect error corrections were observed on the chain of custody (COC), instead of the proper procedure of a single strike through, correction, and initials and date of person making the corrections. 1.0 SELECT VOLATILE ORGANIC COMPOUNDS The samples were analyzed for VOCs in ambient air by US EPA method TO-15 using Full Scan. The areas of data review are listed below. A leading check mark () indicates an area of review in which the data were acceptable. A preceding crossed circle () signifies areas where issues were raised over the course of the validation review and should be considered to determine any impact on data quality and usability.  Overall Assessment  Holding Time  Method Blank  Laboratory Control Sample  Surrogates  Field Duplicate  Sensitivity  Electronic Data Deliverable Review 1.1 Overall Assessment The VOC data reported in this sample set are considered usable for supporting project objectives. The results are considered valid; the analytical completeness, defined as the ratio of the number of valid analytical results (valid analytical results include values qualified as estimated) to the total number of analytical results requested on samples submitted for this analysis, for this sample set is 100%. 1.2 Holding Time The holding time for the TO-15 analysis of an air sample collected in a Summa canister is 30 days from collection to analysis. The holding times were met for the sample analyses. Soil Vapor Evaluation Data Validation 10 November 2023 Page 3 Soil Vapor Evaluation 2310251 DVR.docx Final Review: K Henderson 11/11/2023 1.3 Method Blank Method blanks were analyzed at the proper frequency for the number and types of samples analyzed (one per batch of 20 samples). One method blank was reported (filename 91102008). VOCs were not detected in the method blank above the reporting limits (RLs). 1.4 Laboratory Control Sample (LCS) LCSs were analyzed at the proper frequency for the number and types of samples analyzed (one per batch of 20 samples). One LCS/LCS duplicate (LCSD) pair was reported. The recovery and relative percent difference (RPD) results were within the laboratory specified acceptance criteria. The laboratory also reported continuing calibration verification (CCV) standards. The CCV recoveries were within the method specified acceptance criteria. 1.5 Surrogates The surrogate recoveries were within the laboratory specified acceptance criteria. 1.6 Field Duplicate A field duplicate sample was collected with the sample set, SV-03S-10032023-DUP. Acceptable precision (RPD ≤ 30%) was demonstrated between the field duplicate and the original sample, SV- 03S-10032023, with the following exceptions. Acetone and ethanol were detected at concentrations greater than the RLs in the field duplicate and not detected greater than the RLs in the parent sample, resulting in non-calculable RPDs. Therefore, based on professional and technical judgement, the concentrations of acetone and ethanol were J qualified as estimated and the non-detect results were UJ qualified as estimated less than the RLs in the field duplicate pair SV-03S-10032023/ SV-03S-10032023-DUP. Sample ID Compound Laboratory Result (µg/m3) Laboratory Flag RPD Validation Result (µg/m3) Validation Qualifier* Reason Code** SV-03S-10032023- DUP Acetone 56 NA NC 56 J 7 SV-03S-10032023 Acetone 51 U 51 UJ 7 SV-03S-10032023- DUP Ethanol 49 NA NC 49 J 7 Soil Vapor Evaluation Data Validation 10 November 2023 Page 4 Soil Vapor Evaluation 2310251 DVR.docx Final Review: K Henderson 11/11/2023 Sample ID Compound Laboratory Result (µg/m3) Laboratory Flag RPD Validation Result (µg/m3) Validation Qualifier* Reason Code** SV-03S-10032023 Ethanol 40 U 40 UJ 7 µg/m3-microgram per cubic meter U-not detected at or above the RLs NA-not applicable NC-non-calculable RPD-relative percent difference * Validation qualifiers are defined in Attachment 1 at the end of this report **Reason codes are defined in Attachment 2 at the end of this report 1.7 Sensitivity The samples were reported to the RLs. Samples SV-03S-10032023, SV-03S-10032023-DUP and SV-03M-10032023 were diluted due to the presence of high-level target species. Elevated non- detect results were reported due to the dilutions analyzed. 1.8 Electronic Data Deliverable (EDD) Review The results and sample ID in the EDD were reviewed against the information provided by the associated level II report at a minimum of 20% as part of the data validation process. No discrepancies were identified between the level II report and the EDD. * * * * * Soil Vapor Evaluation Data Validation 10 November 2023 Page 5 Soil Vapor Evaluation 2310251 DVR.docx Final Review: K Henderson 11/11/2023 ATTACHMENT 1 DATA VALIDATION QUALIFIER DEFINITIONS AND INTERPRETATION KEY Assigned by Geosyntec’s Data Validation Team DATA QUALIFIER DEFINITIONS U The analyte was analyzed for, but was not detected above the reported sample quantitation limit. Upon application of the U qualifier to a reported result, the definition changes to “not detected at or above the reported result”. J The analyte was positively identified; the associated numerical value is the approximate concentration of the analyte in the sample. J+ The analyte was positively identified; however, the associated numerical value is likely to be higher than the concentration of the analyte in the sample due to positive bias of associated QC or calibration data or attributable to matrix interference. J- The analyte was positively identified; however, the associated numerical value is likely to be lower than the concentration of the analyte in the sample due to negative bias of associated QC or calibration data or attributable to matrix interference. UJ The analyte was not detected above the reported sample quantitation limit. However, the reported quantitation limit is approximate and may or may not represent the actual limit of quantitation necessary to accurately and precisely measure the analyte in the sample. R The sample results are rejected due to serious deficiencies in the ability to analyze the sample and meet quality control criteria. The presence or absence of the analyte cannot be verified. Soil Vapor Evaluation Data Validation 10 November 2023 Page 6 Soil Vapor Evaluation 2310251 DVR.docx Final Review: K Henderson 11/11/2023 ATTACHMENT 2 DATA VALIDATION REASON CODES Assigned by Geosyntec’s Data Validation Team Valid Value Description 1 Preservation requirement not met 2 Extraction or analysis holding time exceeded 3 Blank contamination (i.e., method, trip, equipment, etc.) 4 Matrix spike/matrix spike duplicate recovery or RPD outside limits 5 LCS recovery outside limits or RPD outside limits (LCS/LCSD) 6 Surrogate recovery outside limits 7 Field Duplicate RPD exceeded 8 Serial dilution percent difference exceeded 9 Calibration criteria not met 10 Linear range exceeded 11 Internal standard criteria not met 12 Lab duplicates RPD exceeded 13 Other 14 Lab flag removed: no validation qualification required RPD-relative percent difference ATTACHMENT G J&E MODEL SPREADSHEETS Model Input Site Name/Run Number:ATK Promontory SV-01 Source Characteristics:Units Symbol Value Default Potential Span CV Flag Comment Source medium Source Groundwater Groundwater concentration (ug/L) Cmedium 34.7 NA Depth below grade to water table (m) Ls 33.18 Vary - 50 NA Average groundwater temperature (oC)Ts 13 25 3 - 25 Calc: Source vapor concentration (ug/m3) Cs 7965 Calc: % of pure component saturated vapor concentration (%) %Sat 0.002% Chemical:Units Symbol Value Default Potential Span CV Flag Comment Chemical Name Chem Trichloroethylene CAS No. CAS 79-01-6 Toxicity Factors Unit risk factor (ug/m3)-1 IUR see note see note NA NA Mutagenic compound Mut Yes NA NA NA Reference concentration (mg/m3)RfC 2.00E-03 2.00E-03 NA NA Chemical Properties:Units Symbol Value Default Potential Span CV Flag Comment Pure component water solubility (mg/L)S 1.28E+03 1.28E+03 NA NA Henry's Law Constant @ 25oC(atm-m3/mol)Hc 9.85E-03 9.85E-03 NA NA Calc: Henry's Law Constant @ 25oC (dimensionless) Hr 4.03E-01 4.03E-01 Calc: Henry's Law Constant @ system temperature (dimensionless) Hs 2.30E-01 4.20E-01 Diffusivity in air (cm2/s) Dair 6.87E-02 6.87E-02 NA NA Diffusivity in water (cm2/s) Dwater 1.02E-05 1.02E-05 NA NA Note: -Yellow highlighted cells indicate parameters that typically are changed or must be inputted by the user. -Dotted outline cells indicate default values that may be changed with justification. -Toxicity values are taken from Regional Screening Level tables. These tables are updated semi- annually and may not reflect the most current toxicity information. Use English / Metric Converter P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-01_USEPA JEM_v6_Site Modeling_res.xlsm Page 1 of 5 Building Characteristics: 1 Units Symbol Value Default Potential Span CV Flag Comment Building setting Bldg_Setting Residential Residential Foundation type Found_Type Slab-on-grade Slab-on-grade Depth below grade to base of foundation (m) Lb 0.10 0.10 0.1 - 2.44 NA Foundation thickness (m) Lf 0.10 0.10 0.1 - 0.25 NA Fraction of foundation area with cracks (-) eta 0.001 0.001 0.00019-0.0019 1.00 Enclosed space floor area (m2) Abf 150.00 150.00 80 - 200 NA Enclosed space mixing height (m) Hb 2.44 2.44 2.13 - 3.05 NA Indoor air exchange rate (1 / hr) ach 0.45 0.45 .15-1.26 NA Qsoil/Qbuilding (-) Qsoil_Qb 0.0030 0.0030 0.0001 - 0.05 1.24 Calc: Building ventilation rate (m3/hr) Qb 164.70 164.70 NA 0.30 Calc: Average vapor flow rate into building (m3/hr) Qsoil 0.49 0.49 NA NA 0.0001 0.02 0.05 8.235 Select Building Assumptions Use ratio for Qsoil/Qbuilding (recommended if no site specific data available) Specify Qsoil and Qbuilding separately; calculate ratio P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-01_USEPA JEM_v6_Site Modeling_res.xlsm Page 2 of 5 Model Input Site Name/Run Number:ATK Promontory SV-01 Chemical Name: Trichloroethylene CAS No. 79-01-6 Depth below grade to water table: 33.18 meters Vadose zone characteristics:Units Symbol Value Default Potential Span CV Flag Comment Stratum A (Top of soil profile): Stratum A SCS soil type SCS_A Loamy Sand Stratum A thickness (from surface)(m) hSA 4.58 Stratum A total porosity (-) nSA 0.390 0.390 NA 0.20 Stratum A water-filled porosity (-) nwSA 0.076 0.076 0.049 - 0.1 0.25 Stratum A bulk density (g/cm3)rhoSA 1.620 1.620 NA 0.05 Stratum B (Soil layer below Stratum A): Stratum B SCS soil type SCS_B Silt Loam Stratum B thickness (m) hSB 3.97 Stratum B total porosity (-) nSB 0.439 0.439 NA 0.20 Stratum B water-filled porosity (-) nwSB 0.180 0.180 0.065 - 0.3 0.25 Stratum B bulk density (g/cm3)rhoSB 1.490 1.490 NA 0.05 Stratum C (Soil layer below Stratum B): Stratum C SCS soil type SCS_C Silty Clay Stratum C thickness (m) hSC 24.64 Stratum C total porosity (-) nSC 0.481 0.481 NA 0.20 Stratum C water-filled porosity (-) nwSC 0.216 0.216 0.11 - 0.32 0.25 Stratum C bulk density (g/cm3)rhoSC 1.380 1.380 NA 0.05 Stratum directly above the water table Stratum A, B, or C src_soil Stratum C Height of capillary fringe (m) hcz 1.923 1.923 NA NA Capillary zone total porosity (-) ncz 0.481 0.481 NA 0.20 Capillary zone water filled porosity (-) nwcz 0.424 0.424 NA 0.19 Exposure Parameters:Units Symbol Value Default Potential Span CV Flag Comment Target risk for carcinogens (-) Target_CR 1.00E-06 1.00E-06 NA NA (-) Target_HQ 1 1 NA NA Exposure Scenario Scenario Residential Residential Averaging time for carcinogens (yrs) ATc 70 70 NA NA Averaging time for non-carcinogens (yrs) ATnc 26 26 NA NA Exposure duration (yrs) ED 26 26 NA NA Exposure frequency (days/yr) EF 350 350 NA NA Exposure time (hrs/24 hrs) ET 24 24 NA NA Mutagenic mode-of-action factor (yrs) MMOAF 72 72 NA NA MMOAF used in place of ED in risk calculations Target hazard quotient for non-carcinogens P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-01_USEPA JEM_v6_Site Modeling_res.xlsm Page 3 of 5 Model Output Site Name/Run Number:ATK Promontory SV-01 Chemical Name: Trichloroethylene CAS No. 79-01-6 Source to Indoor Air Attenuation Factor Units Symbol Value Range Default Default Range Flag Groundwater to indoor air attenuation coefficient (-)alpha 5.1E-06 4.9E-06 - 5.1E-06 4.8E-06 4.6E-06 - 4.8E-06 Predicted Indoor Air Concentration Units Symbol Value Range Default Default Range Flag Indoor air concentration due to vapor intrusion (ug/m3)Cia 4.0E-02 3.9E-02 - 4.1E-02 3.8E-02 3.7E-02 - 3.8E-02 (ppbv)7.5E-03 7.2E-03 - 7.6E-03 7.2E-03 6.8E-03 - 7.2E-03 Predicted Vapor Conc. Beneath Foundation Units Symbol Value Range Default Default Range Flag Subslab vapor concentration (ug/m3)Css 1.3E+01 8.1E-01 - 3.9E+02 1.3E+01 3.7E+02 - 3.8E+02 (ppbv)2.5E+00 1.5E-01 - 7.2E+01 2.4E+00 6.8E+01 - 7.2E+01 Diffusive Transport Upward Through Vadose Zone Units Symbol Value Range Default Default Range Flag Effective diffusion coefficient through Stratum A (cm2/sec)DeffA 9.5E-03 - 9.5E-03 - Effective diffusion coefficient through Stratum B (cm2/sec)DeffB 4.0E-03 - 4.0E-03 - Effective diffusion coefficient through Stratum C (cm2/sec)DeffC 3.6E-03 - 3.6E-03 - Effective diffusion coefficient through capillary zone (cm2/sec)DeffCZ 3.3E-05 - 2.8E-05 - Effective diffusion coefficient through unsaturated zone (cm2/sec)DeffT 5.0E-04 - 4.7E-04 - Critical Parameters Symbol Value Range Default Default Range Flag (-) A_Param 5.1E-06 - 4.8E-06 (-) B_Param 9.3E+01 3.1E+00 - 1.5E+03 9.3E+01 3.1E+00 - 1.5E+03  for convective transport from subslab to building (-)C_Param 3.0E-03 1.0E-04 - 5.0E-02 3.0E-03 1.0E-04 - 5.0E-02 Interpretation Concentration versus Depth Profile Advection is the dominant mechanism across the foundation. Diffusion through soil is the overall rate limiting process. Critical Parameters Hb, Ls, DeffT, ach Non-Critical Parameters Qsoil_Qb, Lf, DeffA, eta Range is based on the reasonable range of Qsoil/Qbuilding values, as reported in the literature.  for diffusive transport from source to building with dirt floor foundation Pe (Peclet Number) for transport through the foundation (advection / diffusion) P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-01_USEPA JEM_v6_Site Modeling_res.xlsm Page 4 of 5 Model Output Site Name/Run Number:ATK Promontory SV-01 Chemical Name: Trichloroethylene CAS No. 79-01-6 Risk Calculations Units Symbol Value Range Default Range Flag Risk-Based Target Screening Levels Scenario: Residential Target risk for carcinogens (-)Target_CR 1E-06 - 1E-06 - Target hazard quotient for noncarcinogens (-)Target_HQ 1 - 1 - Target indoor air concentration (ug/m3) Target_IA 4.78E-01 -4.78E-01 - (ppbv) 8.91E-02 -8.91E-02 - Target groundwater concentration (ug/L) Target_GW 4.10E+02 4.1E+02 - 4.3E+02 2.36E+02 4.3E+02 - 4.5E+02 Incremental Risk Estimates Incremental cancer risk from vapor intrusion (-) Cancer_Risk 8.47E-08 8.1E-08 - 8.5E-08 8.03E-08 7.7E-08 - 8.0E-08 Hazard quotient from vapor intrusion (-) HQ 1.94E-02 1.9E-02 - 1.9E-02 1.84E-02 1.8E-02 - 1.8E-02 P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-01_USEPA JEM_v6_Site Modeling_res.xlsm Page 5 of 5 Model Input Site Name/Run Number:ATK Promontory SV-01 Source Characteristics:Units Symbol Value Default Potential Span CV Flag Comment Source medium Source Groundwater Groundwater concentration (ug/L) Cmedium 34.7 NA Depth below grade to water table (m) Ls 33.18 Vary - 50 NA Average groundwater temperature (oC)Ts 13 25 3 - 25 Calc: Source vapor concentration (ug/m3) Cs 7965 Calc: % of pure component saturated vapor concentration (%) %Sat 0.002% Chemical:Units Symbol Value Default Potential Span CV Flag Comment Chemical Name Chem Trichloroethylene CAS No. CAS 79-01-6 Toxicity Factors Unit risk factor (ug/m3)-1 IUR see note see note NA NA Mutagenic compound Mut Yes NA NA NA Reference concentration (mg/m3)RfC 2.00E-03 2.00E-03 NA NA Chemical Properties:Units Symbol Value Default Potential Span CV Flag Comment Pure component water solubility (mg/L)S 1.28E+03 1.28E+03 NA NA Henry's Law Constant @ 25oC(atm-m3/mol)Hc 9.85E-03 9.85E-03 NA NA Calc: Henry's Law Constant @ 25oC (dimensionless) Hr 4.03E-01 4.03E-01 Calc: Henry's Law Constant @ system temperature (dimensionless) Hs 2.30E-01 4.20E-01 Diffusivity in air (cm2/s) Dair 6.87E-02 6.87E-02 NA NA Diffusivity in water (cm2/s) Dwater 1.02E-05 1.02E-05 NA NA Note: -Yellow highlighted cells indicate parameters that typically are changed or must be inputted by the user. -Dotted outline cells indicate default values that may be changed with justification. -Toxicity values are taken from Regional Screening Level tables. These tables are updated semi- annually and may not reflect the most current toxicity information. Use English / Metric Converter P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-01_USEPA JEM_v6_HHRA_res.xlsm Page 1 of 5 Building Characteristics: 1 Units Symbol Value Default Potential Span CV Flag Comment Building setting Bldg_Setting Residential Residential Foundation type Found_Type Slab-on-grade Slab-on-grade Depth below grade to base of foundation (m) Lb 0.10 0.10 0.1 - 2.44 NA Foundation thickness (m) Lf 0.10 0.10 0.1 - 0.25 NA Fraction of foundation area with cracks (-) eta 0.001 0.001 0.00019-0.0019 1.00 Enclosed space floor area (m2) Abf 150.00 150.00 80 - 200 NA Enclosed space mixing height (m) Hb 2.44 2.44 2.13 - 3.05 NA Indoor air exchange rate (1 / hr) ach 0.45 0.45 .15-1.26 NA Qsoil/Qbuilding (-) Qsoil_Qb 0.0030 0.0030 0.0001 - 0.05 1.24 Calc: Building ventilation rate (m3/hr) Qb 164.70 164.70 NA 0.30 Calc: Average vapor flow rate into building (m3/hr) Qsoil 0.49 0.49 NA NA 0.0001 0.02 0.05 8.235 Select Building Assumptions Use ratio for Qsoil/Qbuilding (recommended if no site specific data available) Specify Qsoil and Qbuilding separately; calculate ratio P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-01_USEPA JEM_v6_HHRA_res.xlsm Page 2 of 5 Model Input Site Name/Run Number:ATK Promontory SV-01 Chemical Name: Trichloroethylene CAS No. 79-01-6 Depth below grade to water table: 33.18 meters Vadose zone characteristics:Units Symbol Value Default Potential Span CV Flag Comment Stratum A (Top of soil profile): Stratum A SCS soil type SCS_A Silty Clay Stratum A thickness (from surface)(m) hSA 6.10 Stratum A total porosity (-) nSA 0.481 0.481 NA 0.20 Stratum A water-filled porosity (-) nwSA 0.216 0.216 0.11 - 0.32 0.25 Stratum A bulk density (g/cm3)rhoSA 1.380 1.380 NA 0.05 Stratum B (Soil layer below Stratum A): Stratum B SCS soil type SCS_B Clay Stratum B thickness (m) hSB 12.20 Stratum B total porosity (-) nSB 0.459 0.459 NA 0.20 Stratum B water-filled porosity (-) nwSB 0.215 0.215 0.098 - 0.33 0.25 Stratum B bulk density (g/cm3)rhoSB 1.430 1.430 NA 0.05 Stratum C (Soil layer below Stratum B): Stratum C SCS soil type SCS_C Silty Clay Stratum C thickness (m) hSC 14.88 Stratum C total porosity (-) nSC 0.481 0.481 NA 0.20 Stratum C water-filled porosity (-) nwSC 0.216 0.216 0.11 - 0.32 0.25 Stratum C bulk density (g/cm3)rhoSC 1.380 1.380 NA 0.05 Stratum directly above the water table Stratum A, B, or C src_soil Stratum C Height of capillary fringe (m) hcz 1.923 1.923 NA NA Capillary zone total porosity (-) ncz 0.481 0.481 NA 0.20 Capillary zone water filled porosity (-) nwcz 0.424 0.424 NA 0.19 Exposure Parameters:Units Symbol Value Default Potential Span CV Flag Comment Target risk for carcinogens (-) Target_CR 1.00E-06 1.00E-06 NA NA (-) Target_HQ 1 1 NA NA Exposure Scenario Scenario Residential Residential Averaging time for carcinogens (yrs) ATc 70 70 NA NA Averaging time for non-carcinogens (yrs) ATnc 26 26 NA NA Exposure duration (yrs) ED 26 26 NA NA Exposure frequency (days/yr) EF 350 350 NA NA Exposure time (hrs/24 hrs) ET 24 24 NA NA Mutagenic mode-of-action factor (yrs) MMOAF 72 72 NA NA MMOAF used in place of ED in risk calculations Target hazard quotient for non-carcinogens P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-01_USEPA JEM_v6_HHRA_res.xlsm Page 3 of 5 Model Output Site Name/Run Number:ATK Promontory SV-01 Chemical Name: Trichloroethylene CAS No. 79-01-6 Source to Indoor Air Attenuation Factor Units Symbol Value Range Default Default Range Flag Groundwater to indoor air attenuation coefficient (-)alpha 5.0E-06 4.7E-06 - 5.0E-06 4.5E-06 4.4E-06 - 4.6E-06 Predicted Indoor Air Concentration Units Symbol Value Range Default Default Range Flag Indoor air concentration due to vapor intrusion (ug/m3)Cia 4.0E-02 3.8E-02 - 4.0E-02 3.6E-02 3.5E-02 - 3.6E-02 (ppbv)7.4E-03 7.0E-03 - 7.4E-03 6.7E-03 6.5E-03 - 6.7E-03 Predicted Vapor Conc. Beneath Foundation Units Symbol Value Range Default Default Range Flag Subslab vapor concentration (ug/m3)Css 1.3E+01 7.9E-01 - 3.8E+02 1.2E+01 3.5E+02 - 3.6E+02 (ppbv)2.5E+00 1.5E-01 - 7.0E+01 2.2E+00 6.5E+01 - 6.7E+01 Diffusive Transport Upward Through Vadose Zone Units Symbol Value Range Default Default Range Flag Effective diffusion coefficient through Stratum A (cm2/sec)DeffA 3.6E-03 - 3.6E-03 - Effective diffusion coefficient through Stratum B (cm2/sec)DeffB 3.0E-03 - 3.0E-03 - Effective diffusion coefficient through Stratum C (cm2/sec)DeffC 3.6E-03 - 3.6E-03 - Effective diffusion coefficient through capillary zone (cm2/sec)DeffCZ 3.3E-05 - 2.8E-05 - Effective diffusion coefficient through unsaturated zone (cm2/sec)DeffT 4.9E-04 - 4.4E-04 - Critical Parameters Symbol Value Range Default Default Range Flag (-) A_Param 5.0E-06 - 4.6E-06 (-) B_Param 2.5E+02 8.3E+00 - 4.1E+03 2.5E+02 8.3E+00 - 4.1E+03  for convective transport from subslab to building (-)C_Param 3.0E-03 1.0E-04 - 5.0E-02 3.0E-03 1.0E-04 - 5.0E-02 Interpretation Concentration versus Depth Profile Advection is the dominant mechanism across the foundation. Diffusion through soil is the overall rate limiting process. Critical Parameters Hb, Ls, DeffT, ach Non-Critical Parameters Qsoil_Qb, Lf, DeffA, eta  for diffusive transport from source to building with dirt floor foundation Pe (Peclet Number) for transport through the foundation (advection / diffusion) Range is based on the reasonable range of Qsoil/Qbuilding values, as reported in the literature. P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-01_USEPA JEM_v6_HHRA_res.xlsm Page 4 of 5 Model Output Site Name/Run Number:ATK Promontory SV-01 Chemical Name: Trichloroethylene CAS No. 79-01-6 Risk Calculations Units Symbol Value Range Default Range Flag Risk-Based Target Screening Levels Scenario: Residential Target risk for carcinogens (-)Target_CR 1E-06 - 1E-06 - Target hazard quotient for noncarcinogens (-)Target_HQ 1 - 1 - Target indoor air concentration (ug/m3) Target_IA 4.78E-01 -4.78E-01 - (ppbv) 8.91E-02 -8.91E-02 - Target groundwater concentration (ug/L) Target_GW 4.20E+02 4.2E+02 - 4.4E+02 2.51E+02 4.6E+02 - 4.8E+02 Incremental Risk Estimates Incremental cancer risk from vapor intrusion (-) Cancer_Risk 8.27E-08 7.9E-08 - 8.3E-08 7.57E-08 7.2E-08 - 7.6E-08 Hazard quotient from vapor intrusion (-) HQ 1.90E-02 1.8E-02 - 1.9E-02 1.74E-02 1.7E-02 - 1.7E-02 : Note: biodegradation not included in this model, may over estimate indoor air concentrations. P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-01_USEPA JEM_v6_HHRA_res.xlsm Page 5 of 5 Model Input Site Name/Run Number:ATK Promontory SV-02 Source Characteristics:Units Symbol Value Default Potential Span CV Flag Comment Source medium Source Groundwater Groundwater concentration (ug/L) Cmedium 69.9 NA Depth below grade to water table (m) Ls 28.82 Vary - 50 NA Average groundwater temperature (oC)Ts 13 25 3 - 25 Calc: Source vapor concentration (ug/m3) Cs 16044 Calc: % of pure component saturated vapor concentration (%) %Sat 0.003% Chemical:Units Symbol Value Default Potential Span CV Flag Comment Chemical Name Chem Trichloroethylene CAS No. CAS 79-01-6 Toxicity Factors Unit risk factor (ug/m3)-1 IUR see note see note NA NA Mutagenic compound Mut Yes NA NA NA Reference concentration (mg/m3)RfC 2.00E-03 2.00E-03 NA NA Chemical Properties:Units Symbol Value Default Potential Span CV Flag Comment Pure component water solubility (mg/L)S 1.28E+03 1.28E+03 NA NA Henry's Law Constant @ 25oC(atm-m3/mol)Hc 9.85E-03 9.85E-03 NA NA Calc: Henry's Law Constant @ 25oC (dimensionless) Hr 4.03E-01 4.03E-01 Calc: Henry's Law Constant @ system temperature (dimensionless) Hs 2.30E-01 4.20E-01 Diffusivity in air (cm2/s) Dair 6.87E-02 6.87E-02 NA NA Diffusivity in water (cm2/s) Dwater 1.02E-05 1.02E-05 NA NA Note: -Yellow highlighted cells indicate parameters that typically are changed or must be inputted by the user. -Dotted outline cells indicate default values that may be changed with justification. -Toxicity values are taken from Regional Screening Level tables. These tables are updated semi- annually and may not reflect the most current toxicity information. Use English / Metric Converter P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-02_USEPA JEM_v6_Site Modeling_res.xlsm Page 1 of 5 Building Characteristics: 1 Units Symbol Value Default Potential Span CV Flag Comment Building setting Bldg_Setting Residential Residential Foundation type Found_Type Slab-on-grade Slab-on-grade Depth below grade to base of foundation (m) Lb 0.10 0.10 0.1 - 2.44 NA Foundation thickness (m) Lf 0.10 0.10 0.1 - 0.25 NA Fraction of foundation area with cracks (-) eta 0.001 0.001 0.00019-0.0019 1.00 Enclosed space floor area (m2) Abf 150.00 150.00 80 - 200 NA Enclosed space mixing height (m) Hb 2.44 2.44 2.13 - 3.05 NA Indoor air exchange rate (1 / hr) ach 0.45 0.45 .15-1.26 NA Qsoil/Qbuilding (-) Qsoil_Qb 0.0030 0.0030 0.0001 - 0.05 1.24 Calc: Building ventilation rate (m3/hr) Qb 164.70 164.70 NA 0.30 Calc: Average vapor flow rate into building (m3/hr) Qsoil 0.49 0.49 NA NA 0.0001 0.02 0.05 8.235 Select Building Assumptions Use ratio for Qsoil/Qbuilding (recommended if no site specific data available) Specify Qsoil and Qbuilding separately; calculate ratio P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-02_USEPA JEM_v6_Site Modeling_res.xlsm Page 2 of 5 Model Input Site Name/Run Number:ATK Promontory SV-02 Chemical Name: Trichloroethylene CAS No. 79-01-6 Depth below grade to water table: 28.82 meters Vadose zone characteristics:Units Symbol Value Default Potential Span CV Flag Comment Stratum A (Top of soil profile): Stratum A SCS soil type SCS_A Silt Loam Stratum A thickness (from surface)(m) hSA 4.58 Stratum A total porosity (-) nSA 0.439 0.439 NA 0.20 Stratum A water-filled porosity (-) nwSA 0.180 0.180 0.065 - 0.3 0.25 Stratum A bulk density (g/cm3)rhoSA 1.490 1.490 NA 0.05 Stratum B (Soil layer below Stratum A): Stratum B SCS soil type SCS_B Clay Stratum B thickness (m) hSB 3.05 Stratum B total porosity (-) nSB 0.459 0.459 NA 0.20 Stratum B water-filled porosity (-) nwSB 0.215 0.215 0.098 - 0.33 0.25 Stratum B bulk density (g/cm3)rhoSB 1.430 1.430 NA 0.05 Stratum C (Soil layer below Stratum B): Stratum C SCS soil type SCS_C Loam Stratum C thickness (m) hSC 21.20 Stratum C total porosity (-) nSC 0.399 0.399 NA 0.20 Stratum C water-filled porosity (-) nwSC 0.148 0.148 0.061 - 0.24 0.25 Stratum C bulk density (g/cm3)rhoSC 1.590 1.590 NA 0.05 Stratum directly above the water table Stratum A, B, or C src_soil Stratum C Height of capillary fringe (m) hcz 0.375 0.375 NA NA Capillary zone total porosity (-) ncz 0.399 0.399 NA 0.20 Capillary zone water filled porosity (-) nwcz 0.332 0.332 NA 0.23 Exposure Parameters:Units Symbol Value Default Potential Span CV Flag Comment Target risk for carcinogens (-) Target_CR 1.00E-06 1.00E-06 NA NA (-) Target_HQ 1 1 NA NA Exposure Scenario Scenario Residential Residential Averaging time for carcinogens (yrs) ATc 70 70 NA NA Averaging time for non-carcinogens (yrs) ATnc 26 26 NA NA Exposure duration (yrs) ED 26 26 NA NA Exposure frequency (days/yr) EF 350 350 NA NA Exposure time (hrs/24 hrs) ET 24 24 NA NA Mutagenic mode-of-action factor (yrs) MMOAF 72 72 NA NA MMOAF used in place of ED in risk calculations Target hazard quotient for non-carcinogens P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-02_USEPA JEM_v6_Site Modeling_res.xlsm Page 3 of 5 Model Output Site Name/Run Number:ATK Promontory SV-02 Chemical Name: Trichloroethylene CAS No. 79-01-6 Source to Indoor Air Attenuation Factor Units Symbol Value Range Default Default Range Flag Groundwater to indoor air attenuation coefficient (-)alpha 2.6E-05 2.1E-05 - 2.6E-05 3.9E-05 2.8E-05 - 4.0E-05 Predicted Indoor Air Concentration Units Symbol Value Range Default Default Range Flag Indoor air concentration due to vapor intrusion (ug/m3)Cia 4.1E-01 3.3E-01 - 4.1E-01 6.3E-01 4.6E-01 - 6.4E-01 (ppbv)7.7E-02 6.1E-02 - 7.7E-02 1.2E-01 8.5E-02 - 1.2E-01 Predicted Vapor Conc. Beneath Foundation Units Symbol Value Range Default Default Range Flag Subslab vapor concentration (ug/m3)Css 1.4E+02 8.3E+00 - 3.3E+03 2.1E+02 4.6E+03 - 6.4E+03 (ppbv)2.6E+01 1.5E+00 - 6.1E+02 3.9E+01 8.5E+02 - 1.2E+03 Diffusive Transport Upward Through Vadose Zone Units Symbol Value Range Default Default Range Flag Effective diffusion coefficient through Stratum A (cm2/sec)DeffA 4.0E-03 - 4.0E-03 - Effective diffusion coefficient through Stratum B (cm2/sec)DeffB 3.0E-03 - 3.0E-03 - Effective diffusion coefficient through Stratum C (cm2/sec)DeffC 4.3E-03 - 4.3E-03 - Effective diffusion coefficient through capillary zone (cm2/sec)DeffCZ 6.1E-05 - 5.8E-05 - Effective diffusion coefficient through unsaturated zone (cm2/sec)DeffT 2.2E-03 - 3.4E-03 - Critical Parameters Symbol Value Range Default Default Range Flag (-) A_Param 2.6E-05 - 4.0E-05 (-) B_Param 2.2E+02 7.5E+00 - 3.7E+03 2.2E+02 7.5E+00 - 3.7E+03  for convective transport from subslab to building (-)C_Param 3.0E-03 1.0E-04 - 5.0E-02 3.0E-03 1.0E-04 - 5.0E-02 Interpretation Concentration versus Depth Profile Advection is the dominant mechanism across the foundation. Diffusion through soil is the overall rate limiting process. Critical Parameters Hb, Ls, DeffT, ach Non-Critical Parameters Qsoil_Qb, Lf, DeffA, eta Range is based on the reasonable range of Qsoil/Qbuilding values, as reported in the literature.  for diffusive transport from source to building with dirt floor foundation Pe (Peclet Number) for transport through the foundation (advection / diffusion) P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-02_USEPA JEM_v6_Site Modeling_res.xlsm Page 4 of 5 Model Output Site Name/Run Number:ATK Promontory SV-02 Chemical Name: Trichloroethylene CAS No. 79-01-6 Risk Calculations Units Symbol Value Range Default Range Flag Risk-Based Target Screening Levels Scenario: Residential Target risk for carcinogens (-)Target_CR 1E-06 - 1E-06 - Target hazard quotient for noncarcinogens (-)Target_HQ 1 - 1 - Target indoor air concentration (ug/m3) Target_IA 4.78E-01 -4.78E-01 - (ppbv) 8.91E-02 -8.91E-02 - Target groundwater concentration (ug/L) Target_GW 8.13E+01 8.1E+01 - 1.0E+02 2.91E+01 5.3E+01 - 7.3E+01 Incremental Risk Estimates Incremental cancer risk from vapor intrusion (-) Cancer_Risk 8.60E-07 6.9E-07 - 8.7E-07 1.31E-06 9.5E-07 - 1.3E-06 Hazard quotient from vapor intrusion (-) HQ 1.97E-01 1.6E-01 - 2.0E-01 3.01E-01 2.2E-01 - 3.1E-01 : Note: biodegradation not included in this model, may over estimate indoor air concentrations. P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-02_USEPA JEM_v6_Site Modeling_res.xlsm Page 5 of 5 Model Input Site Name/Run Number:ATK Promontory SV-02 Source Characteristics:Units Symbol Value Default Potential Span CV Flag Comment Source medium Source Groundwater Groundwater concentration (ug/L) Cmedium 69.9 NA Depth below grade to water table (m) Ls 28.82 Vary - 50 NA Average groundwater temperature (oC)Ts 13 25 3 - 25 Calc: Source vapor concentration (ug/m3) Cs 16044 Calc: % of pure component saturated vapor concentration (%) %Sat 0.003% Chemical:Units Symbol Value Default Potential Span CV Flag Comment Chemical Name Chem Trichloroethylene CAS No. CAS 79-01-6 Toxicity Factors Unit risk factor (ug/m3)-1 IUR see note see note NA NA Mutagenic compound Mut Yes NA NA NA Reference concentration (mg/m3)RfC 2.00E-03 2.00E-03 NA NA Chemical Properties:Units Symbol Value Default Potential Span CV Flag Comment Pure component water solubility (mg/L)S 1.28E+03 1.28E+03 NA NA Henry's Law Constant @ 25oC(atm-m3/mol)Hc 9.85E-03 9.85E-03 NA NA Calc: Henry's Law Constant @ 25oC (dimensionless) Hr 4.03E-01 4.03E-01 Calc: Henry's Law Constant @ system temperature (dimensionless) Hs 2.30E-01 4.20E-01 Diffusivity in air (cm2/s) Dair 6.87E-02 6.87E-02 NA NA Diffusivity in water (cm2/s) Dwater 1.02E-05 1.02E-05 NA NA Note: -Yellow highlighted cells indicate parameters that typically are changed or must be inputted by the user. -Dotted outline cells indicate default values that may be changed with justification. -Toxicity values are taken from Regional Screening Level tables. These tables are updated semi- annually and may not reflect the most current toxicity information. Use English / Metric Converter P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-02_USEPA JEM_v6_HHRA_res.xlsm Page 1 of 5 Building Characteristics: 1 Units Symbol Value Default Potential Span CV Flag Comment Building setting Bldg_Setting Residential Residential Foundation type Found_Type Slab-on-grade Slab-on-grade Depth below grade to base of foundation (m) Lb 0.10 0.10 0.1 - 2.44 NA Foundation thickness (m) Lf 0.10 0.10 0.1 - 0.25 NA Fraction of foundation area with cracks (-) eta 0.001 0.001 0.00019-0.0019 1.00 Enclosed space floor area (m2) Abf 150.00 150.00 80 - 200 NA Enclosed space mixing height (m) Hb 2.44 2.44 2.13 - 3.05 NA Indoor air exchange rate (1 / hr) ach 0.45 0.45 .15-1.26 NA Qsoil/Qbuilding (-) Qsoil_Qb 0.0030 0.0030 0.0001 - 0.05 1.24 Calc: Building ventilation rate (m3/hr) Qb 164.70 164.70 NA 0.30 Calc: Average vapor flow rate into building (m3/hr) Qsoil 0.49 0.49 NA NA 0.0001 0.02 0.05 8.235 Select Building Assumptions Use ratio for Qsoil/Qbuilding (recommended if no site specific data available) Specify Qsoil and Qbuilding separately; calculate ratio P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-02_USEPA JEM_v6_HHRA_res.xlsm Page 2 of 5 Model Input Site Name/Run Number:ATK Promontory SV-02 Chemical Name: Trichloroethylene CAS No. 79-01-6 Depth below grade to water table: 28.82 meters Vadose zone characteristics:Units Symbol Value Default Potential Span CV Flag Comment Stratum A (Top of soil profile): Stratum A SCS soil type SCS_A Silty Clay Stratum A thickness (from surface)(m) hSA 6.10 Stratum A total porosity (-) nSA 0.481 0.481 NA 0.20 Stratum A water-filled porosity (-) nwSA 0.216 0.216 0.11 - 0.32 0.25 Stratum A bulk density (g/cm3)rhoSA 1.380 1.380 NA 0.05 Stratum B (Soil layer below Stratum A): Stratum B SCS soil type SCS_B Clay Stratum B thickness (m) hSB 12.20 Stratum B total porosity (-) nSB 0.459 0.459 NA 0.20 Stratum B water-filled porosity (-) nwSB 0.215 0.215 0.098 - 0.33 0.25 Stratum B bulk density (g/cm3)rhoSB 1.430 1.430 NA 0.05 Stratum C (Soil layer below Stratum B): Stratum C SCS soil type SCS_C Silty Clay Stratum C thickness (m) hSC 10.52 Stratum C total porosity (-) nSC 0.481 0.481 NA 0.20 Stratum C water-filled porosity (-) nwSC 0.216 0.216 0.11 - 0.32 0.25 Stratum C bulk density (g/cm3)rhoSC 1.380 1.380 NA 0.05 Stratum directly above the water table Stratum A, B, or C src_soil Stratum C Height of capillary fringe (m) hcz 1.923 1.923 NA NA Capillary zone total porosity (-) ncz 0.481 0.481 NA 0.20 Capillary zone water filled porosity (-) nwcz 0.424 0.424 NA 0.19 Exposure Parameters:Units Symbol Value Default Potential Span CV Flag Comment Target risk for carcinogens (-) Target_CR 1.00E-06 1.00E-06 NA NA (-) Target_HQ 1 1 NA NA Exposure Scenario Scenario Residential Residential Averaging time for carcinogens (yrs) ATc 70 70 NA NA Averaging time for non-carcinogens (yrs) ATnc 26 26 NA NA Exposure duration (yrs) ED 26 26 NA NA Exposure frequency (days/yr) EF 350 350 NA NA Exposure time (hrs/24 hrs) ET 24 24 NA NA Mutagenic mode-of-action factor (yrs) MMOAF 72 72 NA NA MMOAF used in place of ED in risk calculations Target hazard quotient for non-carcinogens P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-02_USEPA JEM_v6_HHRA_res.xlsm Page 3 of 5 Model Output Site Name/Run Number:ATK Promontory SV-02 Chemical Name: Trichloroethylene CAS No. 79-01-6 Source to Indoor Air Attenuation Factor Units Symbol Value Range Default Default Range Flag Groundwater to indoor air attenuation coefficient (-)alpha 5.1E-06 4.8E-06 - 5.1E-06 4.5E-06 4.4E-06 - 4.6E-06 Predicted Indoor Air Concentration Units Symbol Value Range Default Default Range Flag Indoor air concentration due to vapor intrusion (ug/m3)Cia 8.1E-02 7.7E-02 - 8.1E-02 7.3E-02 7.0E-02 - 7.3E-02 (ppbv)1.5E-02 1.4E-02 - 1.5E-02 1.4E-02 1.3E-02 - 1.4E-02 Predicted Vapor Conc. Beneath Foundation Units Symbol Value Range Default Default Range Flag Subslab vapor concentration (ug/m3)Css 2.7E+01 1.6E+00 - 7.7E+02 2.4E+01 7.0E+02 - 7.3E+02 (ppbv)5.0E+00 3.0E-01 - 1.4E+02 4.5E+00 1.3E+02 - 1.4E+02 Diffusive Transport Upward Through Vadose Zone Units Symbol Value Range Default Default Range Flag Effective diffusion coefficient through Stratum A (cm2/sec)DeffA 3.6E-03 - 3.6E-03 - Effective diffusion coefficient through Stratum B (cm2/sec)DeffB 3.0E-03 - 3.0E-03 - Effective diffusion coefficient through Stratum C (cm2/sec)DeffC 3.6E-03 - 3.6E-03 - Effective diffusion coefficient through capillary zone (cm2/sec)DeffCZ 3.3E-05 - 2.8E-05 - Effective diffusion coefficient through unsaturated zone (cm2/sec)DeffT 4.3E-04 - 3.9E-04 - Critical Parameters Symbol Value Range Default Default Range Flag (-) A_Param 5.1E-06 - 4.6E-06 (-) B_Param 2.5E+02 8.3E+00 - 4.1E+03 2.5E+02 8.3E+00 - 4.1E+03  for convective transport from subslab to building (-)C_Param 3.0E-03 1.0E-04 - 5.0E-02 3.0E-03 1.0E-04 - 5.0E-02 Interpretation Concentration versus Depth Profile Advection is the dominant mechanism across the foundation. Diffusion through soil is the overall rate limiting process. Critical Parameters Hb, Ls, DeffT, ach Non-Critical Parameters Qsoil_Qb, Lf, DeffA, eta  for diffusive transport from source to building with dirt floor foundation Pe (Peclet Number) for transport through the foundation (advection / diffusion) Range is based on the reasonable range of Qsoil/Qbuilding values, as reported in the literature. P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-02_USEPA JEM_v6_HHRA_res.xlsm Page 4 of 5 Model Output Site Name/Run Number:ATK Promontory SV-02 Chemical Name: Trichloroethylene CAS No. 79-01-6 Risk Calculations Units Symbol Value Range Default Range Flag Risk-Based Target Screening Levels Scenario: Residential Target risk for carcinogens (-)Target_CR 1E-06 - 1E-06 - Target hazard quotient for noncarcinogens (-)Target_HQ 1 - 1 - Target indoor air concentration (ug/m3) Target_IA 4.78E-01 -4.78E-01 - (ppbv) 8.91E-02 -8.91E-02 - Target groundwater concentration (ug/L) Target_GW 4.12E+02 4.1E+02 - 4.3E+02 2.51E+02 4.6E+02 - 4.8E+02 Incremental Risk Estimates Incremental cancer risk from vapor intrusion (-) Cancer_Risk 1.70E-07 1.6E-07 - 1.7E-07 1.52E-07 1.5E-07 - 1.5E-07 Hazard quotient from vapor intrusion (-) HQ 3.89E-02 3.7E-02 - 3.9E-02 3.50E-02 3.3E-02 - 3.5E-02 P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-02_USEPA JEM_v6_HHRA_res.xlsm Page 5 of 5 Model Input Site Name/Run Number:ATK Promontory SV-03 Source Characteristics:Units Symbol Value Default Potential Span CV Flag Comment Source medium Source Groundwater Groundwater concentration (ug/L) Cmedium 1920 NA Depth below grade to water table (m) Ls 30.20 Vary - 50 NA Average groundwater temperature (oC)Ts 13 25 3 - 25 Calc: Source vapor concentration (ug/m3) Cs 440697 Calc: % of pure component saturated vapor concentration (%) %Sat 0.090% Chemical:Units Symbol Value Default Potential Span CV Flag Comment Chemical Name Chem Trichloroethylene CAS No. CAS 79-01-6 Toxicity Factors Unit risk factor (ug/m3)-1 IUR see note see note NA NA Mutagenic compound Mut Yes NA NA NA Reference concentration (mg/m3)RfC 2.00E-03 2.00E-03 NA NA Chemical Properties:Units Symbol Value Default Potential Span CV Flag Comment Pure component water solubility (mg/L)S 1.28E+03 1.28E+03 NA NA Henry's Law Constant @ 25oC(atm-m3/mol)Hc 9.85E-03 9.85E-03 NA NA Calc: Henry's Law Constant @ 25oC (dimensionless) Hr 4.03E-01 4.03E-01 Calc: Henry's Law Constant @ system temperature (dimensionless) Hs 2.30E-01 4.20E-01 Diffusivity in air (cm2/s) Dair 6.87E-02 6.87E-02 NA NA Diffusivity in water (cm2/s) Dwater 1.02E-05 1.02E-05 NA NA Note: -Yellow highlighted cells indicate parameters that typically are changed or must be inputted by the user. -Dotted outline cells indicate default values that may be changed with justification. -Toxicity values are taken from Regional Screening Level tables. These tables are updated semi- annually and may not reflect the most current toxicity information. Use English / Metric Converter P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-03_USEPA JEM_v6_Site Modeling_res.xlsm Page 1 of 5 Building Characteristics: 1 Units Symbol Value Default Potential Span CV Flag Comment Building setting Bldg_Setting Residential Residential Foundation type Found_Type Slab-on-grade Slab-on-grade Depth below grade to base of foundation (m) Lb 0.10 0.10 0.1 - 2.44 NA Foundation thickness (m) Lf 0.10 0.10 0.1 - 0.25 NA Fraction of foundation area with cracks (-) eta 0.001 0.001 0.00019-0.0019 1.00 Enclosed space floor area (m2) Abf 150.00 150.00 80 - 200 NA Enclosed space mixing height (m) Hb 2.44 2.44 2.13 - 3.05 NA Indoor air exchange rate (1 / hr) ach 0.45 0.45 .15-1.26 NA Qsoil/Qbuilding (-) Qsoil_Qb 0.0030 0.0030 0.0001 - 0.05 1.24 Calc: Building ventilation rate (m3/hr) Qb 164.70 164.70 NA 0.30 Calc: Average vapor flow rate into building (m3/hr) Qsoil 0.49 0.49 NA NA 0.0001 0.02 0.05 8.235 Select Building Assumptions Use ratio for Qsoil/Qbuilding (recommended if no site specific data available) Specify Qsoil and Qbuilding separately; calculate ratio P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-03_USEPA JEM_v6_Site Modeling_res.xlsm Page 2 of 5 Model Input Site Name/Run Number:ATK Promontory SV-03 Chemical Name: Trichloroethylene CAS No. 79-01-6 Depth below grade to water table: 30.20 meters Vadose zone characteristics:Units Symbol Value Default Potential Span CV Flag Comment Stratum A (Top of soil profile): Stratum A SCS soil type SCS_A Silt Loam Stratum A thickness (from surface)(m) hSA 5.34 Stratum A total porosity (-) nSA 0.439 0.439 NA 0.20 Stratum A water-filled porosity (-) nwSA 0.180 0.180 0.065 - 0.3 0.25 Stratum A bulk density (g/cm3)rhoSA 1.490 1.490 NA 0.05 Stratum B (Soil layer below Stratum A): Stratum B SCS soil type SCS_B Silty Clay Stratum B thickness (m) hSB 2.29 Stratum B total porosity (-) nSB 0.481 0.481 NA 0.20 Stratum B water-filled porosity (-) nwSB 0.216 0.216 0.11 - 0.32 0.25 Stratum B bulk density (g/cm3)rhoSB 1.380 1.380 NA 0.05 Stratum C (Soil layer below Stratum B): Stratum C SCS soil type SCS_C Silt Loam Stratum C thickness (m) hSC 22.57 Stratum C total porosity (-) nSC 0.439 0.439 NA 0.20 Stratum C water-filled porosity (-) nwSC 0.180 0.180 0.065 - 0.3 0.25 Stratum C bulk density (g/cm3)rhoSC 1.490 1.490 NA 0.05 Stratum directly above the water table Stratum A, B, or C src_soil Stratum C Height of capillary fringe (m) hcz 0.682 0.682 NA NA Capillary zone total porosity (-) ncz 0.439 0.439 NA 0.20 Capillary zone water filled porosity (-) nwcz 0.349 0.349 NA 0.18 Exposure Parameters:Units Symbol Value Default Potential Span CV Flag Comment Target risk for carcinogens (-) Target_CR 1.00E-06 1.00E-06 NA NA (-) Target_HQ 1 1 NA NA Exposure Scenario Scenario Residential Residential Averaging time for carcinogens (yrs) ATc 70 70 NA NA Averaging time for non-carcinogens (yrs) ATnc 26 26 NA NA Exposure duration (yrs) ED 26 26 NA NA Exposure frequency (days/yr) EF 350 350 NA NA Exposure time (hrs/24 hrs) ET 24 24 NA NA Mutagenic mode-of-action factor (yrs) MMOAF 72 72 NA NA MMOAF used in place of ED in risk calculations Target hazard quotient for non-carcinogens P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-03_USEPA JEM_v6_Site Modeling_res.xlsm Page 3 of 5 Model Output Site Name/Run Number:ATK Promontory SV-03 Chemical Name: Trichloroethylene CAS No. 79-01-6 Source to Indoor Air Attenuation Factor Units Symbol Value Range Default Default Range Flag Groundwater to indoor air attenuation coefficient (-)alpha 2.6E-05 2.1E-05 - 2.6E-05 4.5E-05 3.2E-05 - 4.6E-05 Predicted Indoor Air Concentration Units Symbol Value Range Default Default Range Flag Indoor air concentration due to vapor intrusion (ug/m3)Cia 1.1E+01 9.2E+00 - 1.2E+01 2.0E+01 1.4E+01 - 2.0E+01 (ppbv)2.1E+00 1.7E+00 - 2.1E+00 3.7E+00 2.6E+00 - 3.8E+00 Predicted Vapor Conc. Beneath Foundation Units Symbol Value Range Default Default Range Flag Subslab vapor concentration (ug/m3)Css 3.8E+03 2.3E+02 - 9.2E+04 6.7E+03 1.4E+05 - 2.0E+05 (ppbv)7.1E+02 4.3E+01 - 1.7E+04 1.2E+03 2.6E+04 - 3.8E+04 Diffusive Transport Upward Through Vadose Zone Units Symbol Value Range Default Default Range Flag Effective diffusion coefficient through Stratum A (cm2/sec)DeffA 4.0E-03 - 4.0E-03 - Effective diffusion coefficient through Stratum B (cm2/sec)DeffB 3.6E-03 - 3.6E-03 - Effective diffusion coefficient through Stratum C (cm2/sec)DeffC 4.0E-03 - 4.0E-03 - Effective diffusion coefficient through capillary zone (cm2/sec)DeffCZ 1.3E-04 - 1.2E-04 - Effective diffusion coefficient through unsaturated zone (cm2/sec)DeffT 2.3E-03 - 4.1E-03 - Critical Parameters Symbol Value Range Default Default Range Flag (-) A_Param 2.6E-05 - 4.6E-05 (-) B_Param 2.2E+02 7.5E+00 - 3.7E+03 2.2E+02 7.5E+00 - 3.7E+03  for convective transport from subslab to building (-)C_Param 3.0E-03 1.0E-04 - 5.0E-02 3.0E-03 1.0E-04 - 5.0E-02 Interpretation Concentration versus Depth Profile Advection is the dominant mechanism across the foundation. Diffusion through soil is the overall rate limiting process. Critical Parameters Hb, Ls, DeffT, ach Non-Critical Parameters Qsoil_Qb, Lf, DeffA, eta  for diffusive transport from source to building with dirt floor foundation Pe (Peclet Number) for transport through the foundation (advection / diffusion) Range is based on the reasonable range of Qsoil/Qbuilding values, as reported in the literature. P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-03_USEPA JEM_v6_Site Modeling_res.xlsm Page 4 of 5 Model Output Site Name/Run Number:ATK Promontory SV-03 Chemical Name: Trichloroethylene CAS No. 79-01-6 Risk Calculations Units Symbol Value Range Default Range Flag Risk-Based Target Screening Levels Scenario: Residential Target risk for carcinogens (-)Target_CR 1E-06 - 1E-06 - Target hazard quotient for noncarcinogens (-)Target_HQ 1 - 1 - Target indoor air concentration (ug/m3) Target_IA 4.78E-01 -4.78E-01 - (ppbv) 8.91E-02 -8.91E-02 - Target groundwater concentration (ug/L) Target_GW 8.02E+01 8.0E+01 - 1.0E+02 2.52E+01 4.5E+01 - 6.6E+01 Incremental Risk Estimates Incremental cancer risk from vapor intrusion (-) Cancer_Risk 2.39E-05 1.9E-05 - 2.4E-05 4.17E-05 2.9E-05 - 4.2E-05 Hazard quotient from vapor intrusion (-) HQ 5.49E+00 4.4E+00 - 5.5E+00 9.57E+00 6.7E+00 - 9.7E+00 : Note: biodegradation not included in this model, may over estimate indoor air concentrations. P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-03_USEPA JEM_v6_Site Modeling_res.xlsm Page 5 of 5 Model Input Site Name/Run Number:ATK Promontory SV-03 Source Characteristics:Units Symbol Value Default Potential Span CV Flag Comment Source medium Source Groundwater Groundwater concentration (ug/L) Cmedium 1920 NA Depth below grade to water table (m) Ls 30.20 Vary - 50 NA Average groundwater temperature (oC)Ts 13 25 3 - 25 Calc: Source vapor concentration (ug/m3) Cs 440697 Calc: % of pure component saturated vapor concentration (%) %Sat 0.090% Chemical:Units Symbol Value Default Potential Span CV Flag Comment Chemical Name Chem Trichloroethylene CAS No. CAS 79-01-6 Toxicity Factors Unit risk factor (ug/m3)-1 IUR see note see note NA NA Mutagenic compound Mut Yes NA NA NA Reference concentration (mg/m3)RfC 2.00E-03 2.00E-03 NA NA Chemical Properties:Units Symbol Value Default Potential Span CV Flag Comment Pure component water solubility (mg/L)S 1.28E+03 1.28E+03 NA NA Henry's Law Constant @ 25oC(atm-m3/mol)Hc 9.85E-03 9.85E-03 NA NA Calc: Henry's Law Constant @ 25oC (dimensionless) Hr 4.03E-01 4.03E-01 Calc: Henry's Law Constant @ system temperature (dimensionless) Hs 2.30E-01 4.20E-01 Diffusivity in air (cm2/s) Dair 6.87E-02 6.87E-02 NA NA Diffusivity in water (cm2/s) Dwater 1.02E-05 1.02E-05 NA NA Note: -Yellow highlighted cells indicate parameters that typically are changed or must be inputted by the user. -Dotted outline cells indicate default values that may be changed with justification. -Toxicity values are taken from Regional Screening Level tables. These tables are updated semi- annually and may not reflect the most current toxicity information. Use English / Metric Converter P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-03_USEPA JEM_v6_HHRA_res.xlsm Page 1 of 5 Building Characteristics: 1 Units Symbol Value Default Potential Span CV Flag Comment Building setting Bldg_Setting Residential Residential Foundation type Found_Type Slab-on-grade Slab-on-grade Depth below grade to base of foundation (m) Lb 0.10 0.10 0.1 - 2.44 NA Foundation thickness (m) Lf 0.10 0.10 0.1 - 0.25 NA Fraction of foundation area with cracks (-) eta 0.001 0.001 0.00019-0.0019 1.00 Enclosed space floor area (m2) Abf 150.00 150.00 80 - 200 NA Enclosed space mixing height (m) Hb 2.44 2.44 2.13 - 3.05 NA Indoor air exchange rate (1 / hr) ach 0.45 0.45 .15-1.26 NA Qsoil/Qbuilding (-) Qsoil_Qb 0.0030 0.0030 0.0001 - 0.05 1.24 Calc: Building ventilation rate (m3/hr) Qb 164.70 164.70 NA 0.30 Calc: Average vapor flow rate into building (m3/hr) Qsoil 0.49 0.49 NA NA 0.0001 0.02 0.05 8.235 Select Building Assumptions Use ratio for Qsoil/Qbuilding (recommended if no site specific data available) Specify Qsoil and Qbuilding separately; calculate ratio P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-03_USEPA JEM_v6_HHRA_res.xlsm Page 2 of 5 Model Input Site Name/Run Number:ATK Promontory SV-03 Chemical Name: Trichloroethylene CAS No. 79-01-6 Depth below grade to water table: 30.20 meters Vadose zone characteristics:Units Symbol Value Default Potential Span CV Flag Comment Stratum A (Top of soil profile): Stratum A SCS soil type SCS_A Sandy Clay Stratum A thickness (from surface)(m) hSA 1.53 Stratum A total porosity (-) nSA 0.385 0.385 NA 0.20 Stratum A water-filled porosity (-) nwSA 0.197 0.197 0.117 - 0.28 0.25 Stratum A bulk density (g/cm3)rhoSA 1.630 1.630 NA 0.05 Stratum B (Soil layer below Stratum A): Stratum B SCS soil type SCS_B Silty Clay Stratum B thickness (m) hSB 6.10 Stratum B total porosity (-) nSB 0.481 0.481 NA 0.20 Stratum B water-filled porosity (-) nwSB 0.216 0.216 0.11 - 0.32 0.25 Stratum B bulk density (g/cm3)rhoSB 1.380 1.380 NA 0.05 Stratum C (Soil layer below Stratum B): Stratum C SCS soil type SCS_C Silty Clay Stratum C thickness (m) hSC 22.57 Stratum C total porosity (-) nSC 0.481 0.481 NA 0.20 Stratum C water-filled porosity (-) nwSC 0.216 0.216 0.11 - 0.32 0.25 Stratum C bulk density (g/cm3)rhoSC 1.380 1.380 NA 0.05 Stratum directly above the water table Stratum A, B, or C src_soil Stratum C Height of capillary fringe (m) hcz 1.923 1.923 NA NA Capillary zone total porosity (-) ncz 0.481 0.481 NA 0.20 Capillary zone water filled porosity (-) nwcz 0.424 0.424 NA 0.19 Exposure Parameters:Units Symbol Value Default Potential Span CV Flag Comment Target risk for carcinogens (-) Target_CR 1.00E-06 1.00E-06 NA NA (-) Target_HQ 1 1 NA NA Exposure Scenario Scenario Residential Residential Averaging time for carcinogens (yrs) ATc 70 70 NA NA Averaging time for non-carcinogens (yrs) ATnc 26 26 NA NA Exposure duration (yrs) ED 26 26 NA NA Exposure frequency (days/yr) EF 350 350 NA NA Exposure time (hrs/24 hrs) ET 24 24 NA NA Mutagenic mode-of-action factor (yrs) MMOAF 72 72 NA NA MMOAF used in place of ED in risk calculations Target hazard quotient for non-carcinogens P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-03_USEPA JEM_v6_HHRA_res.xlsm Page 3 of 5 Model Output Site Name/Run Number:ATK Promontory SV-03 Chemical Name: Trichloroethylene CAS No. 79-01-6 Source to Indoor Air Attenuation Factor Units Symbol Value Range Default Default Range Flag Groundwater to indoor air attenuation coefficient (-)alpha 5.0E-06 4.8E-06 - 5.1E-06 4.8E-06 4.5E-06 - 4.8E-06 Predicted Indoor Air Concentration Units Symbol Value Range Default Default Range Flag Indoor air concentration due to vapor intrusion (ug/m3)Cia 2.2E+00 2.1E+00 - 2.2E+00 2.1E+00 2.0E+00 - 2.1E+00 (ppbv)4.1E-01 4.0E-01 - 4.1E-01 3.9E-01 3.7E-01 - 3.9E-01 Predicted Vapor Conc. Beneath Foundation Units Symbol Value Range Default Default Range Flag Subslab vapor concentration (ug/m3)Css 7.4E+02 4.5E+01 - 2.1E+04 7.0E+02 2.0E+04 - 2.1E+04 (ppbv)1.4E+02 8.3E+00 - 4.0E+03 1.3E+02 3.7E+03 - 3.9E+03 Diffusive Transport Upward Through Vadose Zone Units Symbol Value Range Default Default Range Flag Effective diffusion coefficient through Stratum A (cm2/sec)DeffA 1.8E-03 - 1.8E-03 - Effective diffusion coefficient through Stratum B (cm2/sec)DeffB 3.6E-03 - 3.6E-03 - Effective diffusion coefficient through Stratum C (cm2/sec)DeffC 3.6E-03 - 3.6E-03 - Effective diffusion coefficient through capillary zone (cm2/sec)DeffCZ 3.3E-05 - 2.8E-05 - Effective diffusion coefficient through unsaturated zone (cm2/sec)DeffT 4.5E-04 - 4.2E-04 - Critical Parameters Symbol Value Range Default Default Range Flag (-) A_Param 5.1E-06 - 4.8E-06 (-) B_Param 5.0E+02 1.7E+01 - 8.3E+03 5.0E+02 1.7E+01 - 8.3E+03  for convective transport from subslab to building (-)C_Param 3.0E-03 1.0E-04 - 5.0E-02 3.0E-03 1.0E-04 - 5.0E-02 Interpretation Concentration versus Depth Profile Advection is the dominant mechanism across the foundation. Diffusion through soil is the overall rate limiting process. Critical Parameters Hb, Ls, DeffT, ach Non-Critical Parameters Qsoil_Qb, Lf, DeffA, eta Range is based on the reasonable range of Qsoil/Qbuilding values, as reported in the literature.  for diffusive transport from source to building with dirt floor foundation Pe (Peclet Number) for transport through the foundation (advection / diffusion) P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-03_USEPA JEM_v6_HHRA_res.xlsm Page 4 of 5 Model Output Site Name/Run Number:ATK Promontory SV-03 Chemical Name: Trichloroethylene CAS No. 79-01-6 Risk Calculations Units Symbol Value Range Default Range Flag Risk-Based Target Screening Levels Scenario: Residential Target risk for carcinogens (-)Target_CR 1E-06 - 1E-06 - Target hazard quotient for noncarcinogens (-)Target_HQ 1 - 1 - Target indoor air concentration (ug/m3) Target_IA 4.78E-01 -4.78E-01 - (ppbv) 8.91E-02 -8.91E-02 - Target groundwater concentration (ug/L) Target_GW 4.13E+02 4.1E+02 - 4.3E+02 2.40E+02 4.4E+02 - 4.6E+02 Incremental Risk Estimates Incremental cancer risk from vapor intrusion (-) Cancer_Risk 4.65E-06 4.4E-06 - 4.7E-06 4.38E-06 4.2E-06 - 4.4E-06 Hazard quotient from vapor intrusion (-) HQ 1.07E+00 1.0E+00 - 1.1E+00 1.00E+00 9.6E-01 - 1.0E+00 : Note: biodegradation not included in this model, may over estimate indoor air concentrations. P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-03_USEPA JEM_v6_HHRA_res.xlsm Page 5 of 5 Model Input Site Name/Run Number:ATK Promontory SV-04 Source Characteristics:Units Symbol Value Default Potential Span CV Flag Comment Source medium Source Groundwater Groundwater concentration (ug/L) Cmedium 1300 NA Depth below grade to water table (m) Ls 17.60 Vary - 50 NA Average groundwater temperature (oC)Ts 13 25 3 - 25 Calc: Source vapor concentration (ug/m3) Cs 298389 Calc: % of pure component saturated vapor concentration (%) %Sat 0.061% Chemical:Units Symbol Value Default Potential Span CV Flag Comment Chemical Name Chem Trichloroethylene CAS No. CAS 79-01-6 Toxicity Factors Unit risk factor (ug/m3)-1 IUR see note see note NA NA Mutagenic compound Mut Yes NA NA NA Reference concentration (mg/m3)RfC 2.00E-03 2.00E-03 NA NA Chemical Properties:Units Symbol Value Default Potential Span CV Flag Comment Pure component water solubility (mg/L)S 1.28E+03 1.28E+03 NA NA Henry's Law Constant @ 25oC(atm-m3/mol)Hc 9.85E-03 9.85E-03 NA NA Calc: Henry's Law Constant @ 25oC (dimensionless) Hr 4.03E-01 4.03E-01 Calc: Henry's Law Constant @ system temperature (dimensionless) Hs 2.30E-01 4.20E-01 Diffusivity in air (cm2/s) Dair 6.87E-02 6.87E-02 NA NA Diffusivity in water (cm2/s) Dwater 1.02E-05 1.02E-05 NA NA Note: -Yellow highlighted cells indicate parameters that typically are changed or must be inputted by the user. -Dotted outline cells indicate default values that may be changed with justification. -Toxicity values are taken from Regional Screening Level tables. These tables are updated semi- annually and may not reflect the most current toxicity information. Use English / Metric Converter P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-04_USEPA JEM_v6_Site Modeling_res.xlsm Page 1 of 5 Building Characteristics: 1 Units Symbol Value Default Potential Span CV Flag Comment Building setting Bldg_Setting Residential Residential Foundation type Found_Type Slab-on-grade Slab-on-grade Depth below grade to base of foundation (m) Lb 0.10 0.10 0.1 - 2.44 NA Foundation thickness (m) Lf 0.10 0.10 0.1 - 0.25 NA Fraction of foundation area with cracks (-) eta 0.001 0.001 0.00019-0.0019 1.00 Enclosed space floor area (m2) Abf 150.00 150.00 80 - 200 NA Enclosed space mixing height (m) Hb 2.44 2.44 2.13 - 3.05 NA Indoor air exchange rate (1 / hr) ach 0.45 0.45 .15-1.26 NA Qsoil/Qbuilding (-) Qsoil_Qb 0.0030 0.0030 0.0001 - 0.05 1.24 Calc: Building ventilation rate (m3/hr) Qb 164.70 164.70 NA 0.30 Calc: Average vapor flow rate into building (m3/hr) Qsoil 0.49 0.49 NA NA 0.0001 0.02 0.05 8.235 Select Building Assumptions Use ratio for Qsoil/Qbuilding (recommended if no site specific data available) Specify Qsoil and Qbuilding separately; calculate ratio P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-04_USEPA JEM_v6_Site Modeling_res.xlsm Page 2 of 5 Model Input Site Name/Run Number:ATK Promontory SV-04 Chemical Name: Trichloroethylene CAS No. 79-01-6 Depth below grade to water table: 17.60 meters Vadose zone characteristics:Units Symbol Value Default Potential Span CV Flag Comment Stratum A (Top of soil profile): Stratum A SCS soil type SCS_A Silt Loam Stratum A thickness (from surface)(m) hSA 4.58 Stratum A total porosity (-) nSA 0.439 0.439 NA 0.20 Stratum A water-filled porosity (-) nwSA 0.180 0.180 0.065 - 0.3 0.25 Stratum A bulk density (g/cm3)rhoSA 1.490 1.490 NA 0.05 Stratum B (Soil layer below Stratum A): Stratum B SCS soil type SCS_B Sandy Loam Stratum B thickness (m) hSB 6.10 Stratum B total porosity (-) nSB 0.387 0.387 NA 0.20 Stratum B water-filled porosity (-) nwSB 0.103 0.103 0.039 - 0.17 0.25 Stratum B bulk density (g/cm3)rhoSB 1.620 1.620 NA 0.05 Stratum C (Soil layer below Stratum B): Stratum C SCS soil type SCS_C Silty Clay Loam Stratum C thickness (m) hSC 6.92 Stratum C total porosity (-) nSC 0.482 0.482 NA 0.20 Stratum C water-filled porosity (-) nwSC 0.198 0.198 0.09 - 0.31 0.25 Stratum C bulk density (g/cm3)rhoSC 1.370 1.370 NA 0.05 Stratum directly above the water table Stratum A, B, or C src_soil Stratum C Height of capillary fringe (m) hcz 1.339 1.339 NA NA Capillary zone total porosity (-) ncz 0.482 0.482 NA 0.20 Capillary zone water filled porosity (-) nwcz 0.399 0.399 NA 0.14 Exposure Parameters:Units Symbol Value Default Potential Span CV Flag Comment Target risk for carcinogens (-) Target_CR 1.00E-06 1.00E-06 NA NA (-) Target_HQ 1 1 NA NA Exposure Scenario Scenario Residential Residential Averaging time for carcinogens (yrs) ATc 70 70 NA NA Averaging time for non-carcinogens (yrs) ATnc 26 26 NA NA Exposure duration (yrs) ED 26 26 NA NA Exposure frequency (days/yr) EF 350 350 NA NA Exposure time (hrs/24 hrs) ET 24 24 NA NA Mutagenic mode-of-action factor (yrs) MMOAF 72 72 NA NA MMOAF used in place of ED in risk calculations Target hazard quotient for non-carcinogens P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-04_USEPA JEM_v6_Site Modeling_res.xlsm Page 3 of 5 Model Output Site Name/Run Number:ATK Promontory SV-04 Chemical Name: Trichloroethylene CAS No. 79-01-6 Source to Indoor Air Attenuation Factor Units Symbol Value Range Default Default Range Flag Groundwater to indoor air attenuation coefficient (-)alpha 1.7E-05 1.5E-05 - 1.7E-05 1.8E-05 1.5E-05 - 1.8E-05 Predicted Indoor Air Concentration Units Symbol Value Range Default Default Range Flag Indoor air concentration due to vapor intrusion (ug/m3)Cia 5.2E+00 4.4E+00 - 5.2E+00 5.4E+00 4.6E+00 - 5.4E+00 (ppbv)9.6E-01 8.2E-01 - 9.7E-01 1.0E+00 8.5E-01 - 1.0E+00 Predicted Vapor Conc. Beneath Foundation Units Symbol Value Range Default Default Range Flag Subslab vapor concentration (ug/m3)Css 1.7E+03 1.0E+02 - 4.4E+04 1.8E+03 4.6E+04 - 5.4E+04 (ppbv)3.2E+02 1.9E+01 - 8.2E+03 3.3E+02 8.5E+03 - 1.0E+04 Diffusive Transport Upward Through Vadose Zone Units Symbol Value Range Default Default Range Flag Effective diffusion coefficient through Stratum A (cm2/sec)DeffA 4.0E-03 - 4.0E-03 - Effective diffusion coefficient through Stratum B (cm2/sec)DeffB 6.9E-03 - 6.9E-03 - Effective diffusion coefficient through Stratum C (cm2/sec)DeffC 4.5E-03 - 4.5E-03 - Effective diffusion coefficient through capillary zone (cm2/sec)DeffCZ 8.3E-05 - 7.9E-05 - Effective diffusion coefficient through unsaturated zone (cm2/sec)DeffT 9.0E-04 - 9.4E-04 - Critical Parameters Symbol Value Range Default Default Range Flag (-) A_Param 1.7E-05 - 1.8E-05 (-) B_Param 2.2E+02 7.5E+00 - 3.7E+03 2.2E+02 7.5E+00 - 3.7E+03  for convective transport from subslab to building (-)C_Param 3.0E-03 1.0E-04 - 5.0E-02 3.0E-03 1.0E-04 - 5.0E-02 Interpretation Concentration versus Depth Profile Advection is the dominant mechanism across the foundation. Diffusion through soil is the overall rate limiting process. Critical Parameters Hb, Ls, DeffT, ach Non-Critical Parameters Qsoil_Qb, Lf, DeffA, eta  for diffusive transport from source to building with dirt floor foundation Pe (Peclet Number) for transport through the foundation (advection / diffusion) Range is based on the reasonable range of Qsoil/Qbuilding values, as reported in the literature. P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-04_USEPA JEM_v6_Site Modeling_res.xlsm Page 4 of 5 Model Output Site Name/Run Number:ATK Promontory SV-04 Chemical Name: Trichloroethylene CAS No. 79-01-6 Risk Calculations Units Symbol Value Range Default Range Flag Risk-Based Target Screening Levels Scenario: Residential Target risk for carcinogens (-)Target_CR 1E-06 - 1E-06 - Target hazard quotient for noncarcinogens (-)Target_HQ 1 - 1 - Target indoor air concentration (ug/m3) Target_IA 4.78E-01 -4.78E-01 - (ppbv) 8.91E-02 -8.91E-02 - Target groundwater concentration (ug/L) Target_GW 1.20E+02 1.2E+02 - 1.4E+02 6.34E+01 1.2E+02 - 1.4E+02 Incremental Risk Estimates Incremental cancer risk from vapor intrusion (-) Cancer_Risk 1.08E-05 9.3E-06 - 1.1E-05 1.12E-05 9.6E-06 - 1.1E-05 Hazard quotient from vapor intrusion (-) HQ 2.48E+00 2.1E+00 - 2.5E+00 2.57E+00 2.2E+00 - 2.6E+00 : Note: biodegradation not included in this model, may over estimate indoor air concentrations. P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-04_USEPA JEM_v6_Site Modeling_res.xlsm Page 5 of 5 Model Input Site Name/Run Number:ATK Promontory SV-04 Source Characteristics:Units Symbol Value Default Potential Span CV Flag Comment Source medium Source Groundwater Groundwater concentration (ug/L) Cmedium 1300 NA Depth below grade to water table (m) Ls 17.60 Vary - 50 NA Average groundwater temperature (oC)Ts 13 25 3 - 25 Calc: Source vapor concentration (ug/m3) Cs 298389 Calc: % of pure component saturated vapor concentration (%) %Sat 0.061% Chemical:Units Symbol Value Default Potential Span CV Flag Comment Chemical Name Chem Trichloroethylene CAS No. CAS 79-01-6 Toxicity Factors Unit risk factor (ug/m3)-1 IUR see note see note NA NA Mutagenic compound Mut Yes NA NA NA Reference concentration (mg/m3)RfC 2.00E-03 2.00E-03 NA NA Chemical Properties:Units Symbol Value Default Potential Span CV Flag Comment Pure component water solubility (mg/L)S 1.28E+03 1.28E+03 NA NA Henry's Law Constant @ 25oC(atm-m3/mol)Hc 9.85E-03 9.85E-03 NA NA Calc: Henry's Law Constant @ 25oC (dimensionless) Hr 4.03E-01 4.03E-01 Calc: Henry's Law Constant @ system temperature (dimensionless) Hs 2.30E-01 4.20E-01 Diffusivity in air (cm2/s) Dair 6.87E-02 6.87E-02 NA NA Diffusivity in water (cm2/s) Dwater 1.02E-05 1.02E-05 NA NA Note: -Yellow highlighted cells indicate parameters that typically are changed or must be inputted by the user. -Dotted outline cells indicate default values that may be changed with justification. -Toxicity values are taken from Regional Screening Level tables. These tables are updated semi- annually and may not reflect the most current toxicity information. Use English / Metric Converter P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-04_USEPA JEM_v6_HHRA_res.xlsm Page 1 of 5 Building Characteristics: 1 Units Symbol Value Default Potential Span CV Flag Comment Building setting Bldg_Setting Residential Residential Foundation type Found_Type Slab-on-grade Slab-on-grade Depth below grade to base of foundation (m) Lb 0.10 0.10 0.1 - 2.44 NA Foundation thickness (m) Lf 0.10 0.10 0.1 - 0.25 NA Fraction of foundation area with cracks (-) eta 0.001 0.001 0.00019-0.0019 1.00 Enclosed space floor area (m2) Abf 150.00 150.00 80 - 200 NA Enclosed space mixing height (m) Hb 2.44 2.44 2.13 - 3.05 NA Indoor air exchange rate (1 / hr) ach 0.45 0.45 .15-1.26 NA Qsoil/Qbuilding (-) Qsoil_Qb 0.0030 0.0030 0.0001 - 0.05 1.24 Calc: Building ventilation rate (m3/hr) Qb 164.70 164.70 NA 0.30 Calc: Average vapor flow rate into building (m3/hr) Qsoil 0.49 0.49 NA NA 0.0001 0.02 0.05 8.235 Select Building Assumptions Use ratio for Qsoil/Qbuilding (recommended if no site specific data available) Specify Qsoil and Qbuilding separately; calculate ratio P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-04_USEPA JEM_v6_HHRA_res.xlsm Page 2 of 5 Model Input Site Name/Run Number:ATK Promontory SV-04 Chemical Name: Trichloroethylene CAS No. 79-01-6 Depth below grade to water table: 17.60 meters Vadose zone characteristics:Units Symbol Value Default Potential Span CV Flag Comment Stratum A (Top of soil profile): Stratum A SCS soil type SCS_A Sandy Clay Stratum A thickness (from surface)(m) hSA 1.53 Stratum A total porosity (-) nSA 0.385 0.385 NA 0.20 Stratum A water-filled porosity (-) nwSA 0.197 0.197 0.117 - 0.28 0.25 Stratum A bulk density (g/cm3)rhoSA 1.630 1.630 NA 0.05 Stratum B (Soil layer below Stratum A): Stratum B SCS soil type SCS_B Silty Clay Stratum B thickness (m) hSB 6.10 Stratum B total porosity (-) nSB 0.481 0.481 NA 0.20 Stratum B water-filled porosity (-) nwSB 0.216 0.216 0.11 - 0.32 0.25 Stratum B bulk density (g/cm3)rhoSB 1.380 1.380 NA 0.05 Stratum C (Soil layer below Stratum B): Stratum C SCS soil type SCS_C Silty Clay Stratum C thickness (m) hSC 9.97 Stratum C total porosity (-) nSC 0.481 0.481 NA 0.20 Stratum C water-filled porosity (-) nwSC 0.216 0.216 0.11 - 0.32 0.25 Stratum C bulk density (g/cm3)rhoSC 1.380 1.380 NA 0.05 Stratum directly above the water table Stratum A, B, or C src_soil Stratum C Height of capillary fringe (m) hcz 1.923 1.923 NA NA Capillary zone total porosity (-) ncz 0.481 0.481 NA 0.20 Capillary zone water filled porosity (-) nwcz 0.424 0.424 NA 0.19 Exposure Parameters:Units Symbol Value Default Potential Span CV Flag Comment Target risk for carcinogens (-) Target_CR 1.00E-06 1.00E-06 NA NA (-) Target_HQ 1 1 NA NA Exposure Scenario Scenario Residential Residential Averaging time for carcinogens (yrs) ATc 70 70 NA NA Averaging time for non-carcinogens (yrs) ATnc 26 26 NA NA Exposure duration (yrs) ED 26 26 NA NA Exposure frequency (days/yr) EF 350 350 NA NA Exposure time (hrs/24 hrs) ET 24 24 NA NA Mutagenic mode-of-action factor (yrs) MMOAF 72 72 NA NA MMOAF used in place of ED in risk calculations Target hazard quotient for non-carcinogens P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-04_USEPA JEM_v6_HHRA_res.xlsm Page 3 of 5 Model Output Site Name/Run Number:ATK Promontory SV-04 Chemical Name: Trichloroethylene CAS No. 79-01-6 Source to Indoor Air Attenuation Factor Units Symbol Value Range Default Default Range Flag Groundwater to indoor air attenuation coefficient (-)alpha 5.3E-06 5.1E-06 - 5.3E-06 4.8E-06 4.5E-06 - 4.8E-06 Predicted Indoor Air Concentration Units Symbol Value Range Default Default Range Flag Indoor air concentration due to vapor intrusion (ug/m3)Cia 1.6E+00 1.5E+00 - 1.6E+00 1.4E+00 1.4E+00 - 1.4E+00 (ppbv)3.0E-01 2.8E-01 - 3.0E-01 2.6E-01 2.5E-01 - 2.6E-01 Predicted Vapor Conc. Beneath Foundation Units Symbol Value Range Default Default Range Flag Subslab vapor concentration (ug/m3)Css 5.3E+02 3.2E+01 - 1.5E+04 4.7E+02 1.4E+04 - 1.4E+04 (ppbv)9.9E+01 5.9E+00 - 2.8E+03 8.8E+01 2.5E+03 - 2.6E+03 Diffusive Transport Upward Through Vadose Zone Units Symbol Value Range Default Default Range Flag Effective diffusion coefficient through Stratum A (cm2/sec)DeffA 1.8E-03 - 1.8E-03 - Effective diffusion coefficient through Stratum B (cm2/sec)DeffB 3.6E-03 - 3.6E-03 - Effective diffusion coefficient through Stratum C (cm2/sec)DeffC 3.6E-03 - 3.6E-03 - Effective diffusion coefficient through capillary zone (cm2/sec)DeffCZ 3.3E-05 - 2.8E-05 - Effective diffusion coefficient through unsaturated zone (cm2/sec)DeffT 2.8E-04 - 2.5E-04 - Critical Parameters Symbol Value Range Default Default Range Flag (-) A_Param 5.3E-06 - 4.8E-06 (-) B_Param 5.0E+02 1.7E+01 - 8.3E+03 5.0E+02 1.7E+01 - 8.3E+03  for convective transport from subslab to building (-)C_Param 3.0E-03 1.0E-04 - 5.0E-02 3.0E-03 1.0E-04 - 5.0E-02 Interpretation Concentration versus Depth Profile Advection is the dominant mechanism across the foundation. Diffusion through soil is the overall rate limiting process. Critical Parameters Hb, Ls, DeffT, ach Non-Critical Parameters Qsoil_Qb, Lf, DeffA, eta  for diffusive transport from source to building with dirt floor foundation Pe (Peclet Number) for transport through the foundation (advection / diffusion) Range is based on the reasonable range of Qsoil/Qbuilding values, as reported in the literature. P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-04_USEPA JEM_v6_HHRA_res.xlsm Page 4 of 5 Model Output Site Name/Run Number:ATK Promontory SV-04 Chemical Name: Trichloroethylene CAS No. 79-01-6 Risk Calculations Units Symbol Value Range Default Range Flag Risk-Based Target Screening Levels Scenario: Residential Target risk for carcinogens (-)Target_CR 1E-06 - 1E-06 - Target hazard quotient for noncarcinogens (-)Target_HQ 1 - 1 - Target indoor air concentration (ug/m3) Target_IA 4.78E-01 -4.78E-01 - (ppbv) 8.91E-02 -8.91E-02 - Target groundwater concentration (ug/L) Target_GW 3.91E+02 3.9E+02 - 4.1E+02 2.40E+02 4.4E+02 - 4.6E+02 Incremental Risk Estimates Incremental cancer risk from vapor intrusion (-) Cancer_Risk 3.33E-06 3.2E-06 - 3.3E-06 2.97E-06 2.8E-06 - 3.0E-06 Hazard quotient from vapor intrusion (-) HQ 7.63E-01 7.3E-01 - 7.6E-01 6.80E-01 6.5E-01 - 6.8E-01 : Note: biodegradation not included in this model, may over estimate indoor air concentrations. P:\!ACTIVE PROJECTS\DE0188A - ATK Bacchus\Promontory\JE Modeling_2023\ATK SV-04_USEPA JEM_v6_HHRA_res.xlsm Page 5 of 5 ATTACHMENT H LITHOLOGY COMPARISON SV‐01 / E3 Lithology ATK Launch Systems Promontory, Utah Site Model HHRA* 0 5 7.5 10 14 15 20 21 25 27 28 30 33.5 35 40 45 50 55 60 65 70 75 80 85 90 92 95 100 105 108.8 110 115 120 125 129 Soil sample for grain size analysis (%sand, %silt, %clay) Depth to groundwater *HHRA lithology shown is based on the vadose‐zone characteristics used in the J&E modeling for Area 4B (Well G‐4) included in the HHRA. Silty sandy GRAVEL Gravelly sandy SILT Bedrock TD=27 ft bgs Loamy sand 7.5 ft bgs: (77.8, 20.0, 2.2) Silt Loam 21 ft bgs: (25.3, 61.2, 13.5) Bedrock (Silty clay properties) Screened 105‐125 ft bgs Screened 105‐125 ft bgs Silty clay Top Depth (ft‐bgs) E‐3 Lithology TD=129 ft bgs SV‐01 Lithology Silty GRAVEL with sand Gravelly SILT Clay Silty Clay Lithology for J&E Modeling SV‐02 / E4 Lithology ATK Launch Systems Promontory, Utah Site Model HHRA* 0 5 7.5 10 15 20 25 27 30 32.5 35 37.5 40 42 45 50 55 60 65 70 75 80 85 90 94.5 95 100 105 110 115 120 125 130 Soil sample for grain size analysis (%sand, %silt, %clay) Depth to groundwater *HHRA lithology shown is based on the vadose‐zone characteristics used in the J&E modeling for Area 4B (Well G‐4) included in the HHRA. Lithology for J&E Modeling Loam 32.5 ft bgs: (45.8, 45.2, 9) Silty clay Screened 110‐130 ft bgs Screened 110‐130 ft bgs Silty sandy GRAVEL TD=130 ft bgs Silty sandy GRAVEL Gravelly sandy clayey SILT Silty sandy GRAVEL Sandy silty GRAVEL Sandy gravelly SILT Gravelly sandy SILT TD=42 ft bgs Silt Loam 7.5 ft bgs: (30.7, 59.3, 10) Clay 20 ft bgs: Top Depth (ft‐bgs) E‐4SV‐02 Lithology Lithology Silty clay Clay Sandy SILT with gravel Lean CLAY Poorly graded SAND with gravel Lean CLAY SV‐03 / B6 Lithology ATK Launch Systems Promontory, Utah Site Model HHRA* 0 Sandy clay 5 7 7.5 10 12 15 17.5 18 20 25 27 28.5 30 32 35 40 44 45 50 51 55 56 60 65 70 75 80 85 90 95 99 100 105 110 115 120 125 Soil sample for grain size analysis (%sand, %silt, %clay) Depth to groundwater *HHRA lithology shown is based on the vadose‐zone characteristics used in the J&E modeling for Area 4 Off‐site (Well H‐6) included in the HHRA. Lithology for J&E Modeling TD=32 ft bgs Silt Loam 7.5 ft bgs: (18.8, 66.8, 14.4) 17.5 ft bgs: (4.9, 57.2, 37.9) Silty Clay Silt Loam 28.5 ft bgs: (27.9, 51.5, 20.6) Screened 105‐125 ft bgs Screened 105‐125 ft bgs Silty clay Sandy lean CLAY with silt and gravel Poorly graded Gravelly SILT Lean CLAY Silty SAND Silty clay Silty SAND with gravel TD=125 ft bgs Poorly graded sandy GRAVEL with silt Poorly graded silty SAND with gravel Silty lean CLAY with sand Silty lean CLAY Poorly graded GRAVEL with silt, clay and sand Top Depth (ft‐bgs) B‐6SV‐03 Lithology Lithology SV‐04 / G2 Lithology ATK Launch Systems Promontory, Utah Site Model HHRA* 0 Sandy clay 5 10 15 20 25 26 27.5 30 33.5 35 40 45 50 55 57.7 60 65 70 75 80 86 90 92 95 100 105 Soil sample for grain size analysis (%sand, %silt, %clay) Depth to groundwater *HHRA lithology shown is based on the vadose‐zone characteristics used in the J&E modeling for Area 4 Off‐site (Well H‐6) included in the HHRA. Lithology for J&E Modeling TD=40 ft bgs Silt Loam 5 ft bgs: (20.1, 61.7, 18.2) Sandy Loam 15 ft bgs: (56.8, 38.3, 4.9) 27.5 ft bgs: (20.7, 64.4, 14.9) Fat CLAY Screened 86‐96 ft bgs Screened 86‐96 ft bgs Silty clay Silty clay loam Clayey SILT SILT and GRAVEL Clayey SILT Clayey SILT Silty clay Lean CLAY with sand SILT and GRAVEL Gravelly SILT with sand Clayey SAND GRAVEL, SILT, CLAY TD‐105 ft bgs Silty CLAY Top Depth (ft‐bgs) G‐2SV‐04 Lithology Lithology