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Home My WebLink About24003_North Davdison II_VIMS Post-Occ Report_421 E. 26th_20230815 Semi-Annual VIMS Post-Occupancy Report 421 E. 26th Street Building Seoul Food Company North Davidson II Brownfields Property Brownfields Project No. 24003-20-060 Charlotte, North Carolina H&H Job No. PAM-003 August 15, 2023 #C-1269 Engineering #C-245 Geology i https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx Semi-Annual VIMS Post-Occupancy Report North Davidson II Brownfields Property 421 E. 26th Street Seoul Food Company Charlotte, North Carolina Brownfields Project No. 24003-20-060 H&H Job No. PAM-003 Table of Contents 1.0 Introduction and Background ...............................................................................................1 2.0 VIMS Post-Occupancy Sampling Activities .........................................................................4 2.1 Sub-Slab Vapor Sampling Methodology ..............................................................................4 2.2 Sub-Slab Vapor Sampling Results ........................................................................................5 2.3 Indoor Air Sampling Methodology .......................................................................................7 2.4 Indoor Air Sampling Results ................................................................................................8 2.5 Vapor Intrusion Evaluation .................................................................................................10 3.0 Summary and Conclusions...................................................................................................11 Figures Figure 1 Site Location Map Figure 2 Site Layout Map Figure 3 Sample Location Map – May 2023 Tables Table 1 Summary of Semi-Annual Analytical Sampling Data Table 2 Summary of Post-Construction Indoor Air Analytical Data Table 3 Summary of Post-Construction Sub-Slab Vapor Analytical Data ii https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx Appendices Appendix A Excerpts from Previous Assessment Activities Appendix B VIMS As-Built Drawings – 421 E. 26th Street (Seoul Food Company) Appendix C Field Sampling Forms and Documents Appendix D Laboratory Analytical Reports Appendix E DEQ Risk Calculator Summary Pages 1 https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx Semi-Annual VIMS Post-Occupancy Report North Davidson II Brownfields Property 421 E. 26th Street Seoul Food Company Charlotte, North Carolina Brownfields Project No. 24003-20-060 H&H Job No. PAM-003 1.0 Introduction and Background On behalf of Mill District Partners LLC (Prospective Developer, PD), Hart & Hickman, PC (H&H) has prepared this report summarizing vapor intrusion mitigation system (VIMS) semi-annual post- occupancy sampling activities completed at the 421 E. 26th Street building located at the North Davidson II North Carolina Department of Environmental Quality (DEQ) Brownfields property (Brownfields Project No. 24003-20-060). The Brownfields property address is indicated as 2315 N. Davidson Street and 421 E. 26th Street in Charlotte, Mecklenburg County, North Carolina (Site or subject Site). A Brownfields Agreement between DEQ and the PD was recorded for the Site on June 9, 2021. The Site has been developed for non-residential use by Mill District Partners LLC who still manages the property. A Site location map is included as Figure 1 and a Site layout map is included as Figure 2. The Site consists of two parcels of land (Parcel Identification Numbers 08305204 and 08305206) that total approximately 3.8 acres separated by a newly installed pedestrian walkway that replaced an inactive rail corridor. The southeastern parcel (2315 N. Davidson Street) is developed with an approximate 29,000-square foot (sq ft) commercial building that has been retrofitted to a commercial space known as the Urban District Market (UDM) Food Hall and currently unoccupied office space. The northwestern parcel (421 E. 26th Street) is developed with an approximate 16,800 sq ft building that has been retrofitted as a commercial restaurant and entertainment space occupied by Seoul Food Company. There is also pavilion under construction that is proposed to be upfitted as a partially-enclosed kitchen with concession-style serving window. This report pertains to the post-occupancy VIMS sampling activities for the Seoul Food Company building located at 421 E. 26th Street. VIMS activities for the pavilion and 2315 N. Davidson Street Brownfields activities will be documented under separate cover. 2 https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx The Seoul Food Company building is a one-story commercial use building utilized for restaurant and entertainment purposes. The total area of the Seoul Food Company building is approximately 15,500 sq ft, which includes the preexisting building and the approximately 1,300 sq ft building extension on the eastern side of the building for use as a walk-in refrigerator. The concrete slab in the building is approximately 4 inches thick. Sections of the pre-existing slab were removed during redevelopment to accommodate tenant utility installation, and a new concrete pad was poured for the building extension. As described in the previous reports of the Site, historical assessments at the 421 E. 26th Street parcel prior to redevelopment indicated acceptable risk levels. However, historical assessment activities at the 2315 N. Davidson Street building indicated the presence of trichloroethylene (TCE) and tetrachlorethylene (PCE) in sub-slab vapor and indoor air samples at concentrations above their respective screening limits (see Appendix A). Therefore, as a precaution for potential future migration of site contaminants, specifically TCE and PCE, a passive VIMS was installed at the Seoul Food building in accordance with the Vapor Intrusion Mitigation Plan – Revision 2 (VIMP) dated May 6, 2021 and approved by the DEQ Brownfields Redevelopment Section via an email dated May 7, 2021. The DEQ-approved VIMP included installation of a VIMS during renovation of the building to minimize the potential for vapor intrusion into the building using a sub-slab depressurization system. The VIMS constructed at the Seoul Food building operates as a passive sub-slab vapor extraction system installed within the building with wind-driven turbine ventilators located above the building roofline to enhance extraction of sub-slab vapors and discharge the vapors above the building. Details regarding the VIMS installation and components for the Seoul Food building are described in the VIMS Installation Completion Report (Installation Report) dated April 4, 2022. DEQ subsequently provided a compliance approval letter dated April 25, 2022. VIMS as-built drawings from the Installation Report for the 421 E. 26th Street building are included as Appendix B. In accordance with the DEQ-approved VIMP, two post-construction confirmation indoor air sampling events are required on a semi-annual basis after occupancy to evaluate effectiveness of 3 https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx the VIMS. H&H performed the first semi-annual post-occupancy sampling event at the Seoul Food building in May 2023 in general accordance with the DEQ-approved VIMP and the DEQ Division of Waste Management (DWM) Vapor Intrusion Guidance dated March 2018. Note, the Seoul Food Company restaurant opened to customers in October 2022. A summary of the May 2023 semi-annual sampling activities, analytical results, conclusions, and future monitoring activities are provided in the following sections. 4 https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx 2.0 VIMS Post-Occupancy Sampling Activities In May 2023 H&H collected indoor air samples in accordance with the VIMP for laboratory analysis to evaluate efficacy of the VIMS. Although not required by the VIMP, H&H also collected concurrent sub-slab vapor samples for comparison to the indoor air data. Comparison of the sub-slab vapor sample data to the indoor air sample data allows for evaluation of potential above-slab interference from background sources unrelated to vapor intrusion. Details regarding the sub-slab vapor sampling methodology and results are described in Sections 2.1 and 2.2, and indoor air sampling methodology and results are described in Sections 2.3 and 2.4. 2.1 Sub-Slab Vapor Sampling Methodology On May 19, 2023, H&H collected sub-slab vapor samples from select monitoring points installed within the 421 E. 26th Street building for comparison to indoor air sample analytical data. Two sub-slab vapor samples were collected from monitoring points MP-3 and MP-9 (Figure 2) to provide representative sub-slab vapor samples from the building footprint. The sub-slab vapor samples were collected following collection of the indoor air samples (Section 2.3) to avoid potential interference with the indoor air sampling during opening and purging of the monitoring points. At each sample location, a temporary expandable plug with a quick connect sampling port was placed within the monitoring point to create an air-tight seal. Teflon sample tubing was then secured to the sampling port and connected to an airflow regulator and laboratory-supplied batch-certified 1-liter stainless steel Summa canister. The air flow regulator was preset by the laboratory to collect a vapor sample at a flow rate no greater than approximately 200 milliliters per minute. Upon Summa canister receipt, H&H performed a shut-in test to verify the canisters and regulators were properly sealed by the laboratory. Prior to sample collection, H&H conducted a leak test at each monitoring point by placing a shroud around the monitoring point and sampling train including the Summa canister. The air within the shroud was flooded with helium gas and 5 https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx concentrations were measured with a calibrated helium detector. Helium concentrations by volume within the shroud were maintained between approximately 10% to 11%. A syringe or small air pump was connected to the sample tubing outside of the shroud and used to purge a minimum of three sample train volumes into a Tedlar® bag at each sampling point. The helium gas detector was used to measure helium concentrations within the Tedlar® bag sample to confirm helium concentrations in the sample were less than 10% of that measured within the shroud. Results of the helium leak checks indicate that short-circuiting at the monitoring points or within the sampling train was not present at unacceptable levels. Sub-slab vapor sample field forms completed by sampling personnel are included in Appendix C. Following a successful leak check, the air flow regulators were opened to allow collection of the sub-slab vapor samples. Vacuum in the Summa canisters was monitored during the sampling event to confirm adequate sample volume was collected at each monitoring point. Upon completion of sample collection, the air flow regulator was closed to the Summa canister. The canisters were labeled with the sample identification, the beginning and ending times, the pressure measurements, and the requested analysis. The canisters were then placed in laboratory-supplied shipping containers and delivered to Waypoint Analytical (Waypoint) under standard chain of custody protocols for analysis of select VOCs by Environmental Protection Agency (EPA) Method TO-15. 2.2 Sub-Slab Vapor Sampling Results A tabular summary of the sub-slab vapor sample analytical results is provided in Table 1, and a copy of the laboratory analytical report with chain of custody record is provided as Appendix D. Note, during the May 2023 sampling at the Seoul Food Company building, additional sub-slab and indoor air samples were collected at the Pavilion (P-1) during the same sampling event. Therefore, these samples are included in the analytical laboratory reports, but the data from the Pavilion will be reported under separate cover. Additionally, a tabular summary of all post-construction sub- slab sampling is provided in Table 3. As the building is for commercial purposes, the sub-slab vapor sample laboratory analytical results were compared to the DEQ DWM Non-Residential Soil Gas Screening Levels (SGSLs) dated January 2023. 6 https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx Laboratory analytical results indicate the presence of several compounds detected above laboratory method detection limits (MDLs), but all the detected compound concentrations are below the DEQ Non-Residential SGSLs. Compounds that were previously detected above the SGSLs during the 2022 pre-occupancy sub-slab sampling, including ethylbenzene and m,p-xylenes, were only detected at low-level estimated “J-flag” concentrations well below the SGSLs (Table 3) during the May 2023 sampling. Note, TCE, a Site contaminant of concern from previous Brownfields assessment activities, was detected in the sub-slab sample from MP-9 at a concentration of 131 µg/m3 and in the sub-slab sample from MP-3 at an estimated “J-flag” concentration of 0.548 J, both of which are less than the DEQ Non-Residential SGSL of 180 µg/m3. The DEQ DWM Vapor Intrusion SGSLs are conservative and based on a target carcinogenic risk (TCR) for potential carcinogenic risks of 1 x 10-6 and a non-carcinogenic target hazard quotient (THQ) of 0.2 for potential non-carcinogenic risks. The DEQ and EPA acceptable risk level for potential carcinogenic risks is a cumulative lifetime incremental cancer risk (LICR) of 1 x 10-4 or less, and the acceptable risk level for non-carcinogenic risks is a cumulative hazard index (HI) of 1 or less. The HI is the sum of the HQs of detected compounds. Sub-Slab Vapor Risk Calculator Results To further evaluate sub-slab vapor concentrations, H&H utilized the DEQ Risk Calculator (January 2023) to further evaluate potential vapor intrusion risks under a non-residential use scenario. H&H utilized the risk calculators to calculate both individual risk levels for each sample, and to simulate a hypothetical “worst-case” scenario, H&H input the highest concentration of each compound that was detected in the sub-slab vapor samples into the DEQ Risk Calculator. The completed DEQ Risk Calculators are included in Appendix E, and the risk calculator results are summarized in the table below. Sample Date Monitoring Point Cumulative LICR Cumulative HI May 19, 2023 7 https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx As shown in the table above, risk calculator results indicate that calculated cumulative carcinogenic LICR values and calculated cumulative non-carcinogenic HI values are within the acceptable risk levels for a non-residential use scenario, including under the worst-case scenario. These sub-slab vapor sample results and risk calculations indicate that concentrations of compounds below the slab are not present at levels that would pose unacceptable risk to the commercial occupants of the building. 2.3 Indoor Air Sampling Methodology On May 17, 2023, H&H collected three indoor air samples (IAS-1 through IAS-3) for laboratory analysis within the 421 E. 26th Street building. An upwind exterior background air sample (BKG- 051723) concurrently with the indoor air sampling event to evaluate compound concentrations in ambient outdoor air. Additionally, one duplicate indoor air sample (IAS-DUP) was collected along with the parent indoor air sample IAS-1 utilizing a laboratory supplied stainless-steel sampling “T”, which allows for the simultaneous collection of two indoor air samples from a single location. The indoor air sample and background air sample locations are shown on Figure 3. Prior to beginning the indoor air sampling, H&H completed a survey in the building to identify potential indoor air or background sources of compounds of concern. The building was operating under normal conditions during the sampling event and no notable use of chemicals with compounds of concern within the building were observed during the sampling event. Indoor air samples were collected and ingress and egress activities minimized to the extent possible. Due to the nature of the restaurant business, regular ingress and egress by customers occurred through the front door which is normal operating conditions for this business. A copy of the indoor air building survey completed during the day of sampling is provided as Appendix C. The indoor air samples were collected using laboratory-supplied individually-certified 6-liter stainless steel Summa sample canisters connected to in-line flow controllers with a vacuum gauge. The background air sample was collected using a laboratory-supplied batch-certified 6-liter stainless steel Summa sample canister connected to an in-line flow controller with a vacuum gauge. The flow controllers were calibrated by the laboratory to allow for sample collection over an 8 https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx approximate 8-hour period consistent with a non-residential use scenario. Teflon tubing was connected to the flow controller with the Teflon tubing elevated by a laboratory stand so that the sample intake point was positioned approximately 5 ft above grade (typical breathing zone height) when the sample canister was set on its base. During sampling activities, indoor/outdoor air pressure differential was measured near the start, middle, and end of the sampling period using a manometer sensitive to 0.001 in-WC. In addition, barometric pressure, exterior wind speed, exterior wind direction, and indoor/outdoor temperature were recorded near the start, middle, and end of the sampling period. Results of differential pressure measurements indicated that there was no measurable difference between the indoor and outdoor pressures during the sampling event. A summary of the field measurement data collected at the time of the indoor air sampling event is included in Appendix C. For QA/QC purposes, H&H personnel periodically monitored the sample canisters to prevent tampering or damage during the sampling event. Vacuum was measured in each of the Summa canisters prior to and after sampling activities. Per laboratory standard operating procedures, a vacuum of approximately 5 to 8 inches of mercury (inHg) was maintained within the canisters at the conclusion of the sampling event. Upon completion of the indoor air sampling event, the Summa canisters were properly labeled with the sample identification, date, time, starting and ending vacuums, and requested analysis. The canisters were then placed in a laboratory-supplied shipping container. The samples were shipped under standard chain-of-custody protocols to Waypoint for analysis of VOCs by EPA Method TO-15. 2.4 Indoor Air Sampling Results A tabular summary of the indoor air sample analytical results is provided in Table 1, and a copy of the laboratory analytical report and chain of custody record is included in Appendix D. Additionally, a tabular summary of all post-construction indoor air sampling in Table 2. The 9 https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx indoor air sample laboratory analytical results were compared to the DEQ DWM Non-Residential IASLs dated January 2023. The indoor air sample analytical results indicate that several compounds were detected at concentrations above laboratory MDLs in the indoor air samples. The compound chloroform was detected in each of the indoor air samples (up to 3.17 µg/m3) at concentrations above the Non- Residential IASL of 0.53 µg/m3 during the May 2023 sampling event. Historical assessments (Appendix A) and pre-occupancy sampling (Table 2) did not identify chloroform as a contaminant of concern at the Seoul Food building. The presence of chloroform during this sampling event could be related to cleaning products that contain bleach or it could appear as a disinfection by- product from other cleaners used for cleaning in the restaurant. Two petroleum-related compounds, naphthalene and 1,2,4-trimethylbenzene, that were detected at concentrations above Non-Residential IASLs in each of the indoor air samples collected during the pre-occupancy sampling in 2022, were either not detected or at detected concentrations well below the IASLs during the May 2023 sampling event. Note, TCE, a primary contaminant of concern at the Site, was not detected above laboratory MDLs in any of the indoor air samples. Non-Residential Use Indoor Air Risk Calculator Results The DEQ DWM Vapor Intrusion IASLs are conservative and based on a TCR for potential carcinogenic risks of 1 x 10-6 and a non-carcinogenic HQ of 0.2 for potential non-carcinogenic risks. To further evaluate sub-slab vapor concentrations, H&H utilized the DEQ Risk Calculator (January 2023) to further evaluate potential health risks posed by indoor air conditions based on May 2023 indoor air sample data. To simulate a hypothetical “worst-case” non-residential use scenario, H&H input the highest concentration of each compound that was detected in the indoor air samples into the DEQ Risk Calculator. The completed DEQ Risk Calculators are included in Appendix E, and the risk calculator results are summarized in the table below. Sample Date Monitoring Point Cumulative LICR Cumulative HI May 17, 2023 10 https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx As shown in the table above, risk calculator results indicate that calculated cumulative carcinogenic LICR values and calculated cumulative non-carcinogenic HI values are within the acceptable risk levels for a non-residential use scenario, even in the “worst-case” scenario. These indoor air sample results and risk calculations indicate that concentrations of compounds in indoor air are not present at levels that would pose unacceptable risk to the commercial occupants of the building. 2.5 Vapor Intrusion Evaluation TCE, the primary COC on the Site, was detected in the sub-slab vapor samples MP-3 and MP-9 above the laboratory MDL but below the DEQ DWM Non-Residential SGSL during the May 2023 semi-annual sampling event (Table 1). However, TCE has not been detected in any post- construction indoor air sample at the Seoul Food building (Table 2). Additionally, chloroform was detected in each indoor air sample above the Non-Residential IASL, but it could be related to cleaning products that contain bleach or appear as a disinfection by-product that occurs in treated tap water. Note, the Seoul Food restaurant also contains a bar, karaoke rooms, and entertainment areas that all would implement regular cleaning. Even with the TCE detections in the sub-slab samples and chloroform detections above the IASL, the associated risk calculations for both the hypothetical worst-case calculated indoor air and sub-slab vapor indicate the levels in the Seoul Food building are acceptable for non-residential use. Based on the analytical sampling data and risk calculations, the VIMS is effectively mitigating potential vapor intrusion risks from Site contaminants to the occupants of the 421 E. 26th Street Seoul Food Company building. 11 https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/PAMAKA - PAM/PAM-003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post-Occupancy/2023-06 IAS/Report/24003_NoDa II_VIMS Post-Occ Report.docx 3.0 Summary and Conclusions H&H has completed the first post-occupancy semi-annual indoor air sampling event at the Seoul Food Company building located at 421 E. 26th Street on the North Davidson II Brownfields Property in Charlotte, North Carolina. The results of the post-occupancy activities indicate the following. Semi-Annual Indoor Air Sampling In May 2023, H&H collected three (3) indoor air samples and two (2) sub-slab vapor samples from the Seoul Food Company building. The main Site contaminant of concern, TCE, was not detected in any of the indoor air samples above the laboratory MDLs. The sub-slab vapor samples collected to compare to indoor air results indicated TCE was detected at concentrations below the non- residential SGSL. Chloroform was also detected in all three indoor air samples at concentrations above the Non-Residential IASL. Even with the TCE detections in the sub-slab samples and chloroform detections above the IASL, non-residential use calculations indicate the carcinogenic risk and HI for both the hypothetical worst-case calculated indoor air risk and sub-slab vapor risk are acceptable for a non-residential use scenario. Conclusion Based on the installed VIMS, indoor air sample results, and acceptable worst-case risk calculations of both indoor air samples and sub-slab vapor samples, the VIMS is effectively mitigating potential vapor intrusion risks to the occupants of the 421 E. 26th Street Seoul Food Company building. Future Activities To continue to evaluate and monitor the effectiveness of the VIMS, H&H will conduct the second post-occupancy semi-annual sampling event in Winter 2023 (December 2023 or January 2024), approximately 12-months after occupancy and during the heating season. Additionally, H&H will prepare and submit an additional semi-annual sampling report to DEQ summarizing the results of the next semi-annual post-occupancy sampling event. Tables Table 1 Summary of Semi-Annual Analytical Sampling Data North Davidson II Brownfields Site 421 East 26th Street Brownfields Project No. 24003-20-060 Charlotte, North Carolina H&H Job No. PAM-003 Evaluation Area Screening Criteria Screening Criteria Sample ID IAS-2 IAS-3 BKG-051723 MP-3 MP-9 Sample Date 5/17/2023 5/17/2023 5/17/2023 5/19/2023 5/19/2023 Sample Type Background Units VOCs (TO-15) Acetone 14.4 14.9 17.9 16.7 20.1 NE 8.30 9.99 NE Benzene 0.383 J 0.370 J 0.408 J 0.389 J 0.421 J 1.6 0.472 J 0.396 J 160 Carbon Disulfide 1.31 JB <0.060 <0.60 <0.060 <0.060 610 0.491 J 1.08 J 61,000 Chloroform 3.17 2.62 7.56 1.34 J <0.086 0.53 5.22 0.527 J 53 Chloromethane 0.753 J 0.768 J 0.755 J 0.689 J 0.747 J 79 0.685 J <0.067 7,900 Dichlorodifluoromethane 2.53 2.49 2.35 J 2.31 J 2.37 J 88 2.27 J 2.42 J 8,800 Ethyl Acetate 2.37 2.32 2.57 0.724 J <0.136 61 <0.136 <0.136 6,100 Ethylbenzene <0.106 <0.106 <0.106 <0.106 <0.106 4.9 0.586 J 0.542 J 490 4-Ethyltoluene <0.128 <0.128 <0.128 0.408 J <0.128 NE 0.673 J 19.9 NE Heptane 0.631 J 0.688 J 0.639 J 0.418 J 0.549 J 350 0.315 J <0.143 35,000 n-Hexane 0.641 J 0.613 J 0.613 J 0.563 J 0.807 J 610 0.613 J 0.401 J 61,000 Isopropyl Alcohol 1.60 J 1.37 J 0.978 J 0.235 J <0.139 180 2.49 J 0.228 J 18,000 Methyl Ethyl Ketone (MEK)1.80 1.86 2.06 1.42 J 1.05 J 4,400 1.11 J 1.35 J 440,000 4-Methyl-2-Pentanone (MIBK)<0.121 <0.121 <0.121 <0.121 <0.121 2,600 <0.121 2.01 J 260,000 Methylene Chloride <0.488 <0.488 <0.488 <0.488 <0.488 530 2.10 2.66 53,000 Naphthalene <0.183 <0.183 <0.183 <0.183 3.89 0.36 <0.183 0.477 J 36 Styrene 2.39 2.34 1.35 J 1.38 J <0.124 880 5.18 0.613 J 88,000 Tetrachloroethene <0.181 0.678 J <0.181 <0.181 <0.181 35 <0.181 11.7 3,500 Tetrahydrofuran 0.386 J 0.468 J 0.353 J <0.107 <0.107 1,800 1.86 1.57 180,000 Toluene 1.39 J 1.33 J 2.40 1.23 J 1.67 J 4,400 2.13 1.42 J 440,000 1,1,1-Trichloroethane <0.144 <0.144 <0.144 <0.144 <0.144 4,400 <0.144 1.34 J 440,000 Trichloroethene <0.199 <0.199 <0.199 <0.199 <0.199 1.8 0.548 J 131 180 Trichlorofluoromethane 1.70 J 1.78 J 1.46 J 1.39 J 1.53 J NE 1.42 J 1.78 J NE 1,2,4-Trimethylbenzene 1.94 J 1.92 J 0.560 J 2.35 J <0.209 53 13.3 168 5,300 1,3,5-Trimethylbenzene 0.722 J 0.653 J <0.236 0.806 J <0.236 53 4.51 88.1 5,300 Vinyl Acetate <0.224 <0.224 <0.224 <0.224 <0.224 180 0.792 J <0.224 18,000 o-Xylene <0.157 <0.157 <0.157 <0.157 <0.157 88 0.907 J 2.87 8,800 m,p-Xylene <0.217 <0.217 <0.217 <0.217 <0.217 88 <0.217 0.460 J 8,800 Xylene (Total)<0.157 <0.157 <0.157 <0.157 <0.157 88 0.907J 3.33 J 8,800 DEQ Cumulative Risk Calculator (3)Acceptable Risk Levels Acceptable Risk Levels LICR 1.4 x 10-5 2.8 x 10-6 --<1.0 x 10-4 1.0 x 10-7 4.7 x 10-7 <1.0 x 10-4 Non-Carcinogenic HI 0.041 0.029 -- <1.0 0.0016 0.16 <1.0 DEQ Cumulative Risk Calculator (3)Acceptable Risk Levels Acceptable Risk Levels LICR --<1.0 x 10-4 <1.0 x 10-4 Non-Carcinogenic HI -- <1.0 <1.0 Notes: 1) North Carolina Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Vapor Intrusion Indoor Air Screening Levels (IASLs) dated January 2023. 2) North Carolina Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Sub-Slab and Exterior Soil Gas Screening Levels (SGSLs) dated January 2023. 3) NC DEQ DWM Cumulative Risk Calculator dated January 2023 and is based up on a TCR = 1 x 10-6 and THQ = 0.2. Concentrations are reported in micrograms per cubic meter (µg/m3). Compound concentrations are reported to the laboratory method detection limits. Laboratory analytical method is shown in parentheses. Only compounds detected in at least one sample are shown in the above table. Bold values indicate an exceedance of DWM Non-Residential IASL or SGSL. TCR = Target Cancer Risk; THQ = Non-Carcinogenic Target Hazard Quotient; LICR = Lifetime Incremental Cancer Risk; HI = Hazard Index VOCs = volatile organic compounds; NA = not analyzed; NE = not established J = Compound was detected above the laboratory method detection limit, but below the laboratory reporting limit resulting in a laboratory estimated concentration. B = Compound was detected in the laboratory method blank. Non-Residential Worst-Case Non-Residential W-C 1.4 x 10-5 0.056 5.6 x 10-7 0.16 Non-Residential SGSLs (2)5/17/2023 Indoor Air Sub-Slab Vapor µg/m3 µg/m3 6.2 x 10-6 0.043 Seoul Food Company - 421 E 26th St Seoul Food Company IAS-1 / IAS-DUP Non-Residential IASLs (1) Non-Residential Non-Residential https://harthick.sharepoint.com/sites/MasterFiles‐1/Shared Documents/AAA‐Master Projects/PAMAKA ‐ PAM/PAM‐003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post‐Occupancy/2023‐06 IAS/Sampling Results_2022‐2023 8/8/2023 Table 1 (Page 1 of 1) Hart & Hickman, PC Table 2 Summary of Post-Construction Indoor Air Analytical Data North Davidson II Brownfields Site 421 East 26th Street Brownfields Project No. 24003-20-060 Charlotte, North Carolina H&H Job No. PAM-003 Evaluation Area Sample ID BAS-1 BKG BKG-051723 Sample Date 2/19/2022 5/17/2023 2/19/2022 3/12/2023 5/17/2023 2/19/2022 3/12/2022 5/17/2023 Sample Type Units VOCs (TO-15) Acetone 21.3 22.3 14.4 14.9 20.8 17.9 17.1 22.0 16.7 7.23 7.39 20.1 NE Benzene 0.594 J 0.626 J 0.383 J 0.370 J 0.617 J 0.408 J 0.623 J 0.486 J 0.389 J 0.492 J 0.454 J 0.421 J 1.6 Carbon Disulfide <0.0608 3.04 J 1.31 JB <0.060 <0.0608 <0.60 <0.0608 0.411 J <0.060 <0.0608 <0.0608 <0.060 610 Carbon Tetrachloride <0.155 0.579 J <0.155 <0.155 0.535 J <0.155 0.591 J 0.541 J <0.155 0.560 J 0.591 J <0.155 2.0 Chloroform <0.0864 <0.0864 3.17 2.62 <0.0864 7.56 <0.0864 <0.0864 1.34 J <0.0864 <0.0864 <0.086 0.53 Chloromethane 0.807 J 0.847 J 0.753 J 0.768 J 0.814 J 0.755 J 0.797 J <0.0673 0.689 J 0.807 J 0.789 J 0.747 J 79 Cyclohexane 35.2 36.3 <0.161 <0.161 14.4 <0.161 13.1 119 <0.161 <0.161 <0.161 <0.161 5,300 1,2-Dichlorobenzene <0.0963 <0.0963 <0.096 <0.096 <0.0963 <0.096 <0.0963 <0.0963 <0.096 <0.0963 <0.0963 <0.096 18,000 1,4-Dichlorobenzene <0.186 <0.186 <0.186 <0.186 <0.186 <0.186 <0.186 <0.186 <0.186 <0.186 <0.186 <0.186 1.1 Dichlorodifluoromethane 2.95 2.94 2.53 2.49 2.94 2.35 J 2.90 <0.134 2.31 J 2.85 3.02 2.37 J 88 cis-1,2-Dichloroethene <0.0955 <0.0955 <0.095 <0.095 <0.0955 <0.095 1.16 J <0.0955 <0.095 <0.0955 <0.0955 <0.095 NE Ethyl Acetate NA NA 2.37 2.32 NA 2.57 NA NA 0.724 J NA NA <0.136 61 Ethanol NA NA NA NA NA NA NA 6.28 NA NA 10.8 NA NE Ethylbenzene 2.20 2.32 <0.106 <0.106 3.89 <0.106 5.44 1.54 J <0.106 <0.106 <0.106 <0.106 4.9 4-Ethyltoluene 35.0 36.9 <0.128 <0.128 82.7 <0.128 228 4.94 0.408 J <0.128 <0.128 <0.128 NE Heptane 8.34 8.07 0.631 J 0.688 J 3.50 0.639 J 3.50 56.6 0.418 J <0.143 0.652 J 0.549 J 350 n-Hexane 8.28 8.22 0.641 J 0.613 J 13.6 0.613 J 12.1 8.46 0.563 J 0.426 J 0.462 J 0.807 J 610 2-Hexanone <0.285 <0.285 <0.285 <0.285 <0.285 <0.285 <0.285 <0.285 <0.285 <0.285 <0.285 <0.285 26 Isopropyl Alcohol 4.08 J 4.40 J 1.60 J 1.37 J 4.45 J 0.978 J 5.31 9.25 0.235 J 0.868 JB 1.53 J <0.139 180 Methyl Ethyl Ketone (MEK) 6.10 5.73 1.80 1.86 8.71 2.06 8.80 2.46 1.42 J 0.991 J 0.843 J 1.05 J 4,400 4-Methyl-2-Pentanone (MIBK)<0.121 <0.121 <0.121 <0.121 <0.121 <0.121 <0.121 <0.121 <0.121 <0.121 <0.121 <0.121 2,600 Methylene Chloride 1.22 J 1.39 J <0.488 <0.488 1.55 J <0.488 1.91 4.33 <0.488 0.910 J 4.87 <0.488 530 Naphthalene 2.77 2.82 <0.183 <0.183 3.07 <0.183 4.09 <0.183 <0.183 <0.183 <0.183 3.89 0.36 Propene 8.84 8.65 <0.242 <0.242 5.78 <0.242 <0.242 <0.242 <0.242 <0.242 <0.242 <0.242 2,600 Styrene 1.84 J 1.96 J 2.39 2.34 2.94 1.35 J 2.42 0.890 J 1.38 J <0.124 <0.124 <0.124 880 Tetrachloroethene <0.181 0.577 J <0.181 0.678 J <0.181 <0.181 <0.181 <0.181 <0.181 <0.181 <0.181 <0.181 35 Tetrahydrofuran 3.91 4.14 0.386 J 0.468 J 8.72 0.353 J 3.85 1.39 J <0.107 0.646 J 0.628 J <0.107 1,800 Toluene 4.13 4.21 1.39 J 1.33 J 5.00 2.40 3.93 26.2 1.23 J 0.795 J 0.701 J 1.67 J 4,400 Trichloroethene <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 1.8 Trichlorofluoromethane 1.44 J 1.60 J 1.70 J 1.78 J 1.53 J 1.46 J 1.62 J 1.49 J 1.39 J 1.59 J 1.51 J 1.53 J NE 1,2,4-Trimethylbenzene 153 161 1.94 J 1.92 J 1,460 0.560 J 4,310 29.8 2.35 J 0.634 J 1.51 J <0.209 53 1,3,5-Trimethylbenzene 46.2 48.1 0.722 J 0.653 J 121 <0.236 1,300 11.2 0.806 J <0.236 0.452 J <0.236 53 o-Xylene 5.35 5.68 <0.157 <0.157 11.0 <0.157 24.4 2.21 <0.157 <0.157 <0.157 <0.157 88 m,p-Xylene 7.34 7.50 <0.217 <0.217 12.9 <0.217 15.1 5.39 JB <0.217 0.426 J 0.408 JB <0.217 88 Xylene (Total)12.7 13.2 <0.157 <0.157 23.9 <0.157 39.5 5.39 JB <0.157 0.426 J 0.408 JB <0.157 88 DEQ Cumulative Risk Calculator (2)Acceptable Risk Levels LICR 1.0 x 10-5 1.4 x 10-5 1.3 x 10-5 8.9 x 10-7 2.8 x 10-6 -- -- --<1.0 x 10-4 Non-Carcinogenic HI 6.3 0.041 22 0.23 0.029 -- -- -- <1.0 Notes: 1) North Carolina Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Vapor Intrusion Indoor Air Screening Levels (IASLs) dated January 2023. 2) NC DEQ DWM Cumulative Risk Calculator dated January 2023 and is based up on a TCR = 1 x 10-6 and THQ = 0.2. Concentrations are reported in micrograms per cubic meter (µg/m3). Compound concentrations are reported to the laboratory method detection limits. Laboratory analytical method is shown in parentheses. Only compounds detected in at least one sample are shown in the above table. Bold values indicate an exceedance of DWM Non-Residential IASL or SGSL. Underlined values indicate an exceedance above the acceptable risk level. TCR = Target Cancer Risk; THQ = Non-Carcinogenic Target Hazard Quotient; LICR = Lifetime Incremental Cancer Risk; HI = Hazard Index VOCs = volatile organic compounds; NA = not analyzed; NE = not established J = Compound was detected above the laboratory method detection limit, but below the laboratory reporting limit resulting in a laboratory estimated concentration. B = Compound was detected in the laboratory method blank. Seoul Food Company - 421 East 26th Street 6.2 x 10-6 0.043 µg/m3 5/17/2023 IAS-1 / IAS-DUP 9.0 x 10-6 Indoor Air Non-Residential IASLs (1) Background Air Non-Residential 2/19/2022 IAS-2 IAS-3 1.1 https://harthick.sharepoint.com/sites/MasterFiles‐1/Shared Documents/AAA‐Master Projects/PAMAKA ‐ PAM/PAM‐003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post‐Occupancy/2023‐06 IAS/Sampling Results_2022‐2023 8/8/2023 Table 2 (Page 1 of 1) Hart & Hickman, PC Table 3 Summary of Post-Construction Sub-Slab Vapor Analytical Data North Davidson II Brownfields Site 421 East 26th Street Brownfields Project No. 24003-20-060 Charlotte, North Carolina H&H Job No. PAM-003 Evaluation Area Sample ID MP-1 MP-3 MP-6 MP-7 MP-9 Sample Date 3/14/2022 5/19/2023 5/19/2023 Sample Type Units VOCs (TO-15) Acetone 24.0 J 8.30 5.08 6.29 9.99 NE Benzene <3.66 0.472 J <0.0733 <0.0733 0.396 J 160 Carbon Disulfide <3.04 0.491 J 1.73 J 2.24 J 1.08 J 61,000 Chloroform <4.2 5.22 <0.0864 <0.0864 0.527 J 53 Chloromethane <3.36 0.685 J <0.0673 <0.0673 <0.067 7,900 Cyclohexane 45.3 J <0.161 <0.161 9.40 <0.161 530,000 Dichlorodifluoromethane <6.72 2.27 J 2.77 3.00 2.42 J 8,800 cis-1,2-Dichloroethene <4.77 <0.095 <0.0955 <0.0955 <0.095 NE Ethanol 83.5 J NA NA NA NA NE Ethylbenzene 4,830 0.586 J 0.538 J <0.106 0.542 J 490 4-Ethyltoluene 46.2 J 0.673 J 23.1 0.664 J 19.9 NE Heptane <7.12 0.315 J 0.402 J 0.529 J <0.143 35,000 n-Hexane <2.36 0.613 J 0.983 J 0.754 J 0.401 J 61,000 2-Hexanone <14.2 <0.285 <0.285 <0.285 <0.285 2,600 Isopropyl Alcohol <6.96 2.49 J 1.69 JB 3.64 J 0.228 J 18,000 Methyl Ethyl Ketone (MEK)<11.2 1.11 J 1.19 J 1.65 1.35 J 440,000 4-Methyl-2-Pentanone (MIBK)<6.03 <0.121 <0.12`1 <0.121 2.01 J 260,000 Methylene Chloride 91.2 2.10 0.806 J 2.88 2.66 53,000 Naphthalene <9.15 <0.183 2.95 2.96 0.477 J 36 Propene <12.1 <0.242 <0.242 <0.242 <0.242 260,000 Styrene <6.17 5.18 2.35 0.699 J 0.613 J 88,000 Tetrachloroethene <9.91 <0.181 0.895 J 1.10 J 11.7 3,500 Tetrahydrofuran <5.35 1.86 2.48 0.725 J 1.57 180,000 Toluene <4.50 2.13 1.51 J 2.36 1.42 J 440,000 1,1,1-Trichloroethane NA <0.144 NA NA 1.34 J 440,000 Trichloroethene <9.91 0.548 J <0.199 <0.199 131 180 Trichlorofluoromethane <6.48 1.42 J 1.78 J 1.88 J 1.78 J NE 1,2,4-Trimethylbenzene 150 13.3 161 3.67 168 5,300 1,3,5-Trimethylbenzene 82.3 J 4.51 37 0.949 J 88.1 5,300 Vinyl Acetate NA 0.792 J NA NA <0.224 18,000 o-Xylene 4,290 0.907 J 1.58 J 0.395 J 2.87 8,800 m,p-Xylene 20,600 <0.217 1.61 J 0.716 J 0.460 J 8,800 Xylene (Total)24,890 0.907J 3.19 J 1.111 J 3.33 J 8,800 DEQ Cumulative Risk Calculator (2)Acceptable Risk Levels LICR 9.8 x 10-6 1.0 x 10-7 8.3 x 10-8 8.2 x 10-8 4.5 x 10-7 <1.0 x 10-4 Non-Carcinogenic HI 0.59 0.0016 0.010 0.0051 0.16 <1.0 Notes: 1) North Carolina Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Sub-Slab and Exterior Soil Gas Screening 2) NC DEQ DWM Cumulative Risk Calculator dated January 2023 and is based up on a TCR = 1 x 10-6 and THQ = 0.2. Concentrations are reported in micrograms per cubic meter (µg/m3). Compound concentrations are reported to the laboratory method detection limits. Laboratory analytical method is shown in parentheses. Only compounds detected in at least one sample are shown in the above table. Bold values indicate an exceedance of DWM Non-Residential IASL or SGSL. Underlined values indicate an exceedance above the acceptable risk level. TCR = Target Cancer Risk; THQ = Non-Carcinogenic Target Hazard Quotient; LICR = Lifetime Incremental Cancer Risk; HI = Hazard Index VOCs = volatile organic compounds; NA = not analyzed; NE = not established J = Compound was detected above the laboratory method detection limit, but below the laboratory reporting limit resulting in a laboratory estimat B = Compound was detected in the laboratory method blank. Non-Residential Sub-Slab Vapor µg/m3 Seoul Food Company - 421 East 26th Street Non-Residential SGSLs (1)2/21/2022 https://harthick.sharepoint.com/sites/MasterFiles‐1/Shared Documents/AAA‐Master Projects/PAMAKA ‐ PAM/PAM‐003 N. Davidson & E. 26th/VIMS/421 E 26 St/Post‐Occupancy/2023‐06 IAS/Sampling Results_2022‐2023 8/8/2023 Table 3 (Page 1 of 1) Hart & Hickman, PC Figures 0 2000 4000 APPROXIMATE SCALE IN FEET N U.S.G.S. QUADRANGLE MAP QUADRANGLE 7.5 MINUTE SERIES (TOPOGRAPHIC) CHARLOTTE EAST, NORTH CAROLINA 1991 TITLE PROJECT SITE LOCATION MAP NORTH DAVIDSON II BROWNFIELDS PROPERTY 2315 N. DAVIDSON STREET & 421 E. 26TH STREET CHARLOTTE, NORTH CAROLINA DATE: JOB NO: REVISION NO: FIGURE: 5-18-20 0 1PAM-003 SITE REVISION NO. 0 JOB NO. PAM-003 DATE: 8-7-23 FIGURE NO. 2 NORTH DAVIDSON II BROWNFIELDS PROPERTY 2315 N. DAVIDSON ST. & 421 E. 26TH ST. CHARLOTTE, NORTH CAROLINA SITE LAYOUT MAP LEGEND SITE PROPERTY BOUNDARY FORMER RAIL SPUR LITTLE SUGAR CREEK DRAINAGE FEATURE 2923 South Tryon Street-Suite 100 Charlotte, North Carolina 28203 704-586-0007(p) 704-586-0373(f) License # C-1269 / #C-245 Geology LYN X L I G H T R A I L N. D A V I D S O N S T R E E T E 26 T H S T R E E T JORD A N P L A C E N. B R E V A R D S T R E E T FORMER LUMBER SHED NODA SELF STORAGE (FORMER U.S. TEXTILE CORP.) (2401 N. DAVIDSON STREET) YANDLE METAL SHOP (2414 N. DAVIDSON STREET) YANDLE METAL SHOP (FORMER GENERAL LATEX & CHEMICAL CORP.) (2414 N. DAVIDSON STREET) COLLECTIVE APARTMENT COMPLEX (FORMER R.H. BOULIGNY, INC.) (2300 N. DAVIDSON STREET) NODA BREWING COMPANY (FORMER GIBBS ELECTROPLATING) (2229 N. DAVIDSON STREET) PERFORMANCE LOGISTICS (511 E. 25TH STREET) WOODTECH INTERIORS, INC (2228 N. BREVARD STREET) SUPERIOR STONE OF THE SOUTHEAST (2310 N. BREVARD STREET) FORMER APPLIED RESEARCH GROUP (2221 N. DAVIDSON STREET) RHINO MARKET & DELI AND FREE RANGE BREWING (2320 N. DAVIDSON STREET) NOTES: 1.AERIAL IMAGERY AND BASE DATA OBTAINED FROM MECKLENBURG COUNTY GIS, 2023. APPROXIMATE LOCATION OF BUILDING SLAB EXTENSION OFF I C E S P A C E (EX I S I T I N G B U I L D I N G ) OPEN-AIR PATIO SPACE 421 E. 26TH STREET PARCEL 2315 N. DAVIDSON STREET PARCEL UDM F O O D H A L L (EX I S T I N G B U I L D I N G ) PAVILION (NEW CONSTRUCTION) SE O U L F O O D C O M P A N Y (E X I S T I N G B U I L D I N G ) S:\ A A A - M a s t e r P r o j e c t s \ P A M A K A - P A M \ P A M - 0 0 3 N . D a v i d s o n & E . 2 6 t h \ V I M S \ F i g u r e s \ 2 0 2 3 F i g u r e 2 \ S i t e M a p _ R 1 _ 2 0 2 3 . d w g POSP F-2 F-3 F-4 F-1 F-6 MP-2 MP-1 MP-4 MP-6 MP-5 MP-1 MP-7 MP-9 MP-8 IAS-1 IAS-2 IAS-3 BKG-051723 F-6 MP-3 F-5 F-7 REVISION NO. 0 JOB NO. PAM-003 DATE: 8-14-22 FIGURE NO. 3 NORTH DAVIDSON II BROWNFIELDS PROPERTY (BROWNFIELDS NO. 24003-02-060) SEOUL FOOD COMPANY 421 EAST 26TH STREET CHARLOTTE, NORTH CAROLINA SAMPLE LOCATION MAP - MAY 2023 2923 South Tryon Street-Suite 100 Charlotte, North Carolina 28203 704-586-0007(p) 704-586-0373(f) License # C-1269 / #C-245 Geology LEGEND EXISTING EXTERIOR WALL AND EXTENTS OF EXISTING CONCRETE SLAB 3" SCH 40 PVC SOLID PIPE SET WITHIN TRENCH WITH SOIL BACKFILL AREA OF NEW CONCRETE WITH MOISTURE BARRIER (STEGO-WRAP) 3" SCH 40 SLOTTED PIPE SET WITHIN GRAVEL BASE BELOW AREA OF NEW CONCRETE 3" SCH 40 PVC RISER WITH CONNECTED TO TRENCH INDIVIDUAL SUCTION POINT WITH 3" SCH 40 PVC RISER INDIVIDUAL SUCTION POINT WITH 3" SCH 40 PVC RISER CONNECTED TO VIMS TRENCH VACUUM MONITORING POINT (1" SCH 40 PVC SLOTTED PIPE SET WITHIN GRAVEL WITH CLEAN-OUT FLOOR COVER) SUCTION TRENCH CLEAN-OUT VIMS ELECTRIC FAN DISCHARGE ON ROOF OFF-SET FROM RISER HORIZONTAL 3" SCH 40 PVC PIPING BELOW CEILING FOR FAN OFF-SET FROM RISER OUTDOOR (OPEN AIR) PATIO & BAR APPROXIMATE LOCATION OF SUB-SLAB VOID (FILLED WITH GRAVEL) INDOOR AIR OR EXTERIOR BACKGROUND SAMPLE LOCATION MONITORING SAMPLING DURING MAY 2023 SEMI-ANNUAL SAMPLING EVENT S:\ A A A - M a s t e r P r o j e c t s \ P A M A K A - P A M \ P A M - 0 0 3 N . D a v i d s o n & E . 2 6 t h \ V I M S \ 4 2 1 E 2 6 S t \ P o s t - O c c u p a n c y \ 4 2 1 E . 2 6 t h S t r e e t _ s a m p l e l o c a t i o n m a p . d w g , F I G 2 , 8 / 1 4 / 2 0 2 3 1 0 : 4 7 : 5 3 A M , mv a w t e r Appendix A Excerpts from Previous Assessment Activities MW-10 IAS-1/SS-1 MW-1 MW-3 SB-1 SS-6 IAS-3/SS-3 IAS-4/SS-4 SS-5 MW-2 SB-2 SB-3 SB-4 BKG-1 MW-4 SB-5 IAS-2/SS-2 SS-7 SB-9 SS-8 SS-9 SS-10 SS-13 SS-12 SB-7 SB-6 SB-8 SW-2 SW-1 SS-11 SED-1 REVISION NO. 0 JOB NO. PAM-003 DATE: 9-28-20 FIGURE NO. A-1 NORTH DAVIDSON II BROWNFIELDS PROPERTY 2315 N. DAVIDSON STREET & 421 E. 26TH STREET CHARLOTTE, NORTH CAROLINA SAMPLE LOCATION MAP LEGEND SITE PROPERTY BOUNDARY FORMER RAIL SPUR LITTLE SUGAR CREEK DRAINAGE FEATURE EXISTING GROUNDWATER MONITORING WELL SOIL BORING SUB-SLAB VAPOR SAMPLE POINT CO-LOCATED SUB-SLAB VAPOR AND INDOOR AIR SAMPLE POINT SURFACE WATER SAMPLE LOCATION SEDIMENT SAMPLE LOCATION ABANDONED MONITORING WELL 2923 South Tryon Street-Suite 100 Charlotte, North Carolina 28203 704-586-0007(p) 704-586-0373(f) License # C-1269 / #C-245 Geology LYN X L I G H T R A I L N. D A V I D S O N S T R E E T E 2 6 T H S T R E E T JORD A N P L A C E APPROXIMATE LOCATION OF FORMER LUMBER WAREHOUSE APPROXIMATE LOCATION OF FORMER AUTO REPAIR SHOP N. B R E V A R D S T R E E T MW-5 SB-1 MW-1 NOTES: 1) MONITORING WELLS MW-1 THROUGH MW-5 WERE INSTALLED IN APRIL 2016 BY SUMMIT ENGINEERING. 2) SOIL SAMPLES WERE COLLECTED BY H&H ON 3/5/-6/2020 AND 8/11-12/2020. 3) SUB-SLAB VAPOR SAMPLES COLLECTED BY H&H ON 8/8/2019 AND 8/11/2020. 4) INDOOR AIR SAMPLES COLLECTED BY H&H ON 11/12/2019. 5) SEDIMENT AND SURFACE WATER SAMPLES COLLECTED BY H&H ON 8/11/2020. IAS-1/SS-1 MW-10 SS-7 SW-1 SED-1 S:\ A A A - M a s t e r P r o j e c t s \ P A M A K A - P A M \ P A M - 0 0 3 N . D a v i d s o n & E . 2 6 t h \ E M P \ F i g u r e s \ S i t e M a p _ R 1 . d w g , 1 2 / 2 2 / 2 0 2 0 1 : 4 2 : 3 2 P M , D W G T o P D F . p c 3 Table A-1 Summary of Groundwater Analytical Results North Davidson II Brownfields Property 2351 N. Davidson Street and 421 E. 26th Street Charlotte, North Carolina H&H Job No. PAM-003 Sample ID MW-1 MW-2 MW-DUP-1 MW-3 MW-4 MW-5 Date 3/5/2020 3/5/2020 3/5/2020 3/6/2020 Area of Potential Concern Former Lumber Shed Former Junkyard Area Former Auto Repair Shop Upgradient Portion of Site VOCs (8260D) Chloroform <2.3 <2.3 <2.3 <11.7 <11.7 3.0J 70 0.81 3.6 cis-1,2-Dichloroethene <0.29 <0.29 <0.29 2.2J <1.5 <0.29 70 NS NS Diisopropyl ether <0.22 <0.22 <0.22 12.8 <1.1 <0.22 70 1,400 5,900 Methyl tert-butyl ether <0.28 <0.28 <0.28 636 <1.4 <0.28 20 450 2,000 Trichloroethene <0.22 <0.22 <0.22 110 669 <0.22 3.0 1.0 4.4 SVOCs (8270E)-- -- -- RCRA Metals (6020B, 7470A) Arsenic 0.395J 0.631J <0.250 0.403J 0.901J <0.250 10 -- -- Arsenic (Dissolved)NA <0.250 <0.250 <0.250 NA NA 10 -- -- Barium 92.0 77.0 22.4 28.9 35.3 78.6 700 -- -- Barium (Dissolved)NA 22.5 22.5 29.6 NA NA 700 -- -- Cadmium <0.160 <0.160 <0.160 0.424J <0.160 <0.160 2.0 -- -- Cadmium (Dissolved)NA <0.160 <0.160 <0.160 NA NA 2.0 -- -- Chromium 1.15J 17.8 1.01J 13.5 394 2.35 10 -- -- Chromium (Dissolved)NA 0.689J 0.738J 1.01J NA NA 10 -- -- Lead 0.970J 2.02 0.482J 1.01J 0.745J 1.21J 15 -- -- Lead (Dissolved)NA <0.240 0.284J <0.240 NA NA 15 -- -- Selenium <0.380 <0.380 <0.380 0.415J 1.33J <0.380 20 -- -- Selenium (Dissolved)NA <0.380 <0.380 <0.380 NA NA 20 -- -- Silver <0.310 <0.310 <0.310 <0.310 <0.310 <0.310 20 -- -- Silver (Dissolved)NA <0.310 <0.310 <0.310 NA NA 20 -- -- Mercury <0.0490 <0.0490 <0.0490 <0.0490 <0.0490 <0.0490 1.0 0.18 0.75 Mercury (Dissolved)NA <0.0490 <0.0490 <0.0490 NA NA 1.0 0.18 0.75 Notes: 1) North Carolina Department of Environmental Quality (DEQ) 15A NCAC 02L.0202 Groundwater Standards (2L Standards) (April 2013) 2) NC DEQ Division of Waste Management (DWM) Residential Vapor Intrusion Groundwater Screening Levels (GWSLs) (July 2020) 3) NC DEQ DWM Non-Residential Vapor Intrusion GWSLs (July 2020) With the exception of metals, only constituents detected in at least one sample are shown. Concentrations are reported in micrograms per liter (µg/L). Compound concentrations are reported to the laboratory method detection limits Laboratory analytical methods are shown in parentheses. Bold concentrations exceed the DEQ 2L Standard and/or the Residential GWSL. Underlined concentrations exceed the DEQ 2L Standard and the Non-Residential GWSL. VOCs = volatile organic compounds; SVOCs = semi-volatile organic compounds, RCRA = Resource Conservation and Recovery Act NA = not analyzed; NS = not specified; -- = not applicable J = estimated value between the laboratory method detection limit and the laboratory reporting limit All Below Laboratory Method Detection Limits NC 2L Groundwater Standards (1) Residential GWSL(2) Non-Residential GWSL(3) 3/6/2020 Former Junkyard Area S:\AAA-Master Projects\PAMAKA - PAM\PAM-003 N. Davidson & E. 26th\EMP\Data Tables\GW Data Table_10-12-20 10/19/2020 Table A-1 Hart & Hickman, PC Table A-2Summary of Sub-slab Vapor Analytical Results North Davidson II Brownfields Property2351 N. Davidson Street and 421 E. 26th Street Charlotte, North CarolinaH&H Job No. PAM-003 Sa m p l e I D Sa m p l e L o c a t i o n Sa m p l e D a t e An a l y t i c a l M e t h o d Ac e t o n e Be n z e n e 2-B u t a n o n e ( M E K ) Ca r b o n D i s u l f i d e Ca r b o n T e t r a c h l o r i d e Ch l o r o f o r m Ch l o r o m e t h a n e Cy c l o h e x a n e 1,2 - D i c h l o r o b e n z e n e 1,4 - D i c h l o r o b e n z e n e Dic h l o r o d i f l u o r o m e t h a n e (F r e o n 1 2 ) cis - 1 , 2 - D i c h l o r o e t h y l 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 He p t a n e He x a n e 2- H e x a n o n e ( M B K ) Is o p r o p a n o l Me t h y l e n e C h l o r i d e 4- M e t h y l - 2 - p e n t a n o n e ( M I B K Na p h t h a l e n e Pr o p e n e St y r e n e Te t r a c h l o r o e t h e n e Te t r a h y d r o f u r a n To l u e n e Tr i c h l o r o e t h e n e Tr i c h l o r o f l u o r o m e t h a n e (F r e o n 1 1 ) 1,2 , 4 - T r i m e t h y l b e n z e n e 1,3 , 5 - 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 SS-1 8/8/2019 100J <2.6 <9.2 <4.3 <4.1 260 <2.8 <4.9 <5.8 <7.3 <4.3 <3.2 120J <5.0 <6.0 <4.8 <12 <4.8 <6.0 <8.4 <3.9 <8.0 <3.4 <5.3 860 <3.9 <3.9 91,000 <6.5 <6.3 <6.2 <10 <5.4 SS-2 8/8/2019 120 0.5J 7.2J <0.43 0.63J 1.9 <0.28 <0.49 <0.58 <0.73 2.5 <0.32 130 <0.50 <0.60 <0.48 <1.2 <0.48 5.4J <0.84 <0.39 0.86J <0.34 <0.53 19 <0.39 0.89 27 2.0J <0.63 <0.62 <1.0 <0.54 SS-3 220 0.33J 5.7J 4.3J <0.41 1.3 <0.28 <0.49 <0.58 <0.73 <0.43 <0.32 130 <0.50 <0.60 <0.48 <1.2 <0.48 16J <0.84 <0.39 <0.80 <0.34 <0.53 3.2 <0.39 0.65J <0.43 1.9J <0.63 <0.62 <1.0 <0.54 DUP-2/SS-3 230 0.42J 7.5J 5.3J <0.41 <0.36 <0.28 <0.49 <0.58 <0.73 2.3 <0.32 110 <0.50 <0.60 <0.48 <1.2 <0.48 11J <0.84 <0.39 0.86J <0.34 <0.53 3.1 <0.39 0.83 <0.43 1.9J <0.63 <0.62 <1.0 <0.54 SS-4 8/8/2019 260 1.3 9.5J 25 <0.41 <0.36 <0.28 <0.49 <0.58 <0.73 2.9 <0.32 110 2.2 2.4 <0.48 <1.2 <0.48 12J 0.85J <0.39 0.94J 17 <0.53 <0.75 <0.39 3.2 <0.43 1.0J 14 8.9 8.9 3.6 SS-5 8/8/2019 72 1.1 10J 8.6 <0.41 <0.36 <0.28 <0.49 <0.58 <0.73 2.8 <0.32 51 0.94 <0.60 2.6 6.1J <0.48 9.4J <0.84 <0.39 1.7 <0.34 <0.53 7.4 <0.39 4.2 1.2 3.2J 2.6 1.4 3.4 1.5 SS-6 8/8/2019 56 0.87 6.9J 20 <0.41 <0.36 <0.28 <0.49 <0.58 <0.73 2.7 <0.32 51 0.64J <0.60 <0.48 <1.2 <0.48 6.7J <0.84 <0.39 1.7 <0.34 <0.53 8.4 <0.39 3.4 6.1 2.7J <0.63 <0.62 2.1 0.82J SS-7 <860 18J <150 <120 <25 92 <24 <25 <33 <20 <23 <20 2,600 22J 32J <27 <96 <35 <340 <120 <32 44J <87 <18 540 <110 23J 43,000 <64 120 49J 77J 43J SS-DUP/SS-7 <860 <14 <150 <120 <25 82 32J <25 <33 <20 <23 <20 600J <14 <23 <27 <96 <35 <340 <120 <32 <44 <87 <18 540 <110 <16 43,000 <64 31J <19 27J <17 SS-8 8/11/2020 600 1.8 22J <1.6 <0.33 29 0.45J 2.5 0.53J 1.1J 2.8 <0.27 1,000 34 82 1.2 <1.3 6.5 28 1.7J 3.4J 4.7J 2.6J 0.44J 170 <1.5 4.0 5,000 6.0 190 40 180 110 SS-9 8/11/2020 140J 0.27J 8.7J 34 <0.33 <0.24 <0.32 2.5 <0.44 0.36J <0.31 <0.27 52 1.6 51 1.3 <1.3 <0.46 7.6J <1.6 0.79J 3.9 <1.2 0.39J 1.4 <1.5 5.0 <0.40 1.5J 130 88 8.5 7.4 SS-10 8/11/2020 <860 <14 <150 <120 <25 150 33J <25 <33 <20 <23 <20 1,300 <14 32J <27 <96 <35 <340 <120 <32 <44 <87 <18 560 <110 <16 26,000 <64 66J 27J 42J 25J SS-11 8/11/2020 170 1.3 44 8.3 <0.33 <0.24 <0.32 1.5 <0.44 <0.27 2.9 <0.27 150 0.97 <0.30 2.2 2.9J 11 38 <1.6 30 1.5J 6.8J 1.3 8.5 <1.5 4.4 <0.40 2.1J 1.1 0.31J 230 0.76J SS-12 8/11/2020 59 0.58J 16J 4.9J <0.33 <0.24 <0.32 6.7 <0.44 <0.27 3.0 <0.27 150 0.28J 0.31J <0.35 <1.3 3.1 13J <1.6 <0.43 0.88J <1.2 0.31J 27 7.1 1.1 1.2 2.7J 0.47J <0.26 1.1J 0.43J SS-13 8/11/2020 38 <0.19 3.6J <1.6 0.45J 0.57J <0.32 2.1 <0.44 <0.27 2.9 1.7 300 0.23J 0.31J <0.35 <1.3 <0.46 12J <1.6 0.67J 0.84J 1.5J 0.77J 4.1 <1.5 0.83 3.1 1.8J 0.37J <0.26 0.8J 0.33J 220,000 120 35,000 4,900 160 41 630 42,000 1,400 85 700 NS NS 370 NS 2,800 4,900 210 1,400 4,200 21,000 21 21,000 7,000 280 14,000 35,000 14 NS 420 420 700 700 2,700,000 1,600 440,000 61,000 2,000 530 7,900 530,000 18,000 1,100 8,800 NS NS 4,900 NS 35,000 61,000 2,600 18,000 53,000 260,000 260 260,000 88,000 3,500 180,000 440,000 180 NS 5,300 5,300 8,800 8,800 Notes: 1) North Carolina Department of Environment Quality (DEQ) Division of Waste Management (DWM) Residential Sub-slab and Exterior Soil Gas Screening Levels (SGSLs) (February 2018) 2) North Carlolina DEQ DWM Non-Residential SGSLs (February 2018).Bold values exceeds the NCDEQ DWM Residential SGSL.Bold and Underlined value exceeds the NCDEQ DWM Residential and Non-Residential SGSL. Compound concentrations are reported to the laboratory detection limits. Compound concentrations are reported in micrograms per cubic meter (µg/m3). J = estimated concentration between the laboratory method detection limit and the laboratory reporting limit NS = Not Specified DWM Residential SGSL (1) DWM Non-Residential SGSL (2) 2315 N. Davidson Street TO-15 8/8/2019 421 E. 26th Street 2315 N. Davidson Street 8/11/2020 421 E. 26th Street S:\AAA‐Master Projects\PAMAKA ‐ PAM\PAM‐003 N. Davidson & E. 26th\VIMS\Combined Data Tables (9‐18‐20) RJC.xlsx 1/7/2021 Table A-2 Hart & Hickman, PC Table A-3 Summary of Indoor Air Analytical Data North Davidson II Brownfields Property 2315 N. Davidson Street and 421 E. 26th Street Charlotte, North Carolina H&H Job No. PAM-003 Sa m p l e I D Sa m p l e L o c a t i o n Sa m p l e D a t e An a l y t i c a l M e t h o d Ch l o r o f o r m Te t r a c h l o r o e t h y l e n e Tr i c h l o r o e t h y l e n e IAS-1 0.10 J <0.13 0.14 J IAS-1 Duplicate (DUP-1)0.20 0.34 <0.076 IAS-2 Southern Portion of 2315 N. Davidson Street Building 11/6/2019 0.086 J <0.13 <0.076 IAS-3 Northern Portion of 2315 N. Davidson Street Building 11/6/2019 0.13 J 0.16 J <0.076 IAS-4 Eastern Portion of 2315 N. Davidson Street Building 11/6/2019 0.12 J <0.23 <0.13 BKG-1 Upwind, West of 2315 N. Davidson Street Building 11/6/2019 <0.11 <0.23 <0.13 0.12 8.3 0.42 0.53 35 1.8 Notes: 1) North Carolina Department of Environment Quality (DEQ) Division of Waste Management (DWM) Residential and Non-Residential Indoor Air Screening Levels (IASLs) dated July 2020. Based on a Total Cumulative Risk of 1x10- and a Target Hazard Quotient of 0.2. Compound concentrations are reported in micrograms per cubic meter (µg/m ). Compound concentrations are reported to the laboratory detection limits. J = Compound was detected above the laboratory method detection limit, but below the laboratory reporting limit resulting in a laboratory estimated concentration. IAS = indoor air sample; BKG = background DWM Non-Residential IASL (1) TO-15 DWM Residential IASL (1) Western Portion of 2315 N. Davidson Street Building 11/6/2019 S:\AAA‐Master Projects\PAMAKA ‐ PAM\PAM‐003 N. Davidson & E. 26th\EMP\Data Tables\Indoor Air Data Table (11‐29‐19) 10/12/2020 Table A-3 Hart & Hickman, PC Appendix B VIMS As-Built Drawings – 421 E. 26th Street (Seoul Food Company) VM-4, VM-5, and VM-6 POSP F-2 F-3 F-4 F-1 F-6 VIMS PLAN VIEW LAYOUT (421 E. 26TH STREET) 1" = 10' 1 VM-4 F-5 F-7 H&H NO. PAM-003 VAPOR INTRUSION MITIGATION SYSTEM (421 E. 26TH ST) PLAN VIEW LAYOUT VM-4 NO R T H D A V I D S O N I I B R O W N F I E L D S P R O P E R T Y (B R O W N F I E L D S N O . 2 4 0 0 3 - 0 2 - 0 6 0 ) SE O U L F O O D C O M P A N Y 42 1 E A S T 2 6 T H S T R E E T CH A R L O T T E , N O R T H C A R O L I N A PROFESSIONAL APPROVAL / SEAL APRIL 4, 2022 TITLE: SHEET: VAPOR INTRUSION MITIGATION PLAN PREPARED BY: 2923 South Tryon Street-Suite 100 Charlotte, North Carolina 28203 704-586-0007(p) 704-586-0373(f) License # C-1269 / #C-245 Geology 04/04/22 LEGEND EXISTING EXTERIOR WALL AND EXTENTS OF EXISTING CONCRETE SLAB 3" SCH 40 PVC SOLID PIPE SET WITHIN TRENCH WITH SOIL BACKFILL AREA OF NEW CONCRETE WITH MOISTURE BARRIER (STEGO-WRAP) 3" SCH 40 SLOTTED PIPE SET WITHIN GRAVEL BASE BELOW AREA OF NEW CONCRETE 3" SCH 40 PVC RISER WITH CONNECTED TO TRENCH INDIVIDUAL SUCTION POINT WITH 3" SCH 40 PVC RISER INDIVIDUAL SUCTION POINT WITH 3" SCH 40 PVC RISER CONNECTED TO VIMS TRENCH VACUUM MONITORING POINT (1" SCH 40 PVC SLOTTED PIPE SET WITHIN GRAVEL WITH CLEAN-OUT FLOOR COVER) SUCTION TRENCH CLEAN-OUT VIMS ELECTRIC FAN DISCHARGE ON ROOF OFF-SET FROM RISER HORIZONTAL 3" SCH 40 PVC PIPING BELOW CEILING FOR FAN OFF-SET FROM RISER OUTDOOR (OPEN AIR) PATIO & BAR APPROXIMATE LOCATION OF SUB-SLAB VOID (FILLED WITH GRAVEL) INDOOR AIR SAMPLE LOCATION NOTES: 1.REFER TO SHEET VM-5 FOR SECTION DETAILS AND SHEET VM-6 FOR SPECIFICATIONS. 2.EACH RISER FAN CONTAINS A WIND DRIVEN TURBINE VENTILATOR. 3.VIMS = VAPOR INTRUSION MITIGATION SYSTEM; SCH = SCHEDULE; TYP = TYPICAL 4.SELECT AREAS FOR UTILITY TRENCHES (NOT DEPICTED) NOT RELATED TO THE VIMS INSTALLATION ALSO RECEIVED STEGO-WRAP VAPOR BARRIER BELOW NEW CONCRETE. 1 VM-5 2 VM-5 2 VM-5 1 VM-5 5 / 9 VM-5 3 / 9 VM-5 3 / 9 VM-5 5 / 9 VM-5 4 / 9 VM-5 8 VM-5 10 VM-5 3A/9 VM-5 GENERAL AREA TO RECEIVE NEW CONCRETE AND 15-MIL VAPOR BARRIER AREA TO RECEIVE NEW CONCRETE AND 15-MIL VAPOR BARRIER VIMS TRENCH APPROXIMATE EXTENTS OF SUB-SLAB VOID (FILLED WITH 57 STONE/GRAVEL) OUTDOOR / OPEN AIR PATIO SPACE 6 / 7 VM-5 6 / 7 VM-5 6 / 7 VM-5 6 / 7 VM-5 OFF-SET DISCHARGE POINT TO BE MIN 10 FT FROM AIR INTAKES 6 / 7 VM-5 COORDINATE POSITION OF RISER F-3 WITH PLUMBING FLOOR SINK TO KEEP LOCATION ABOVE PREVIOUS SUB-SLAB VOID 6 / 7 VM-5 AS-BUILT DRAWING MP-2 MP-1 MP-3 MP-4 MP-6 MP-5 MP-1 MP-7 MP-9 MP-8 IAS-1 IAS-2 IAS-3 BAS-1 BKG S:\ A A A - M a s t e r P r o j e c t s \ P A M A K A - P A M \ P A M - 0 0 3 N . D a v i d s o n & E . 2 6 t h \ V I M S \ 4 2 1 E 2 6 S t \ I n s t a l l a t i o n R e p o r t \ 4 2 1 E . 2 6 t h S t r e e t _ A S - B U I L T _ 0 3 1 7 2 0 2 2 _ R E V . d w g , 4 / 4 / 2 0 2 2 1 1 : 1 6 : 1 2 A M , D W G T o P D F . p c 3 BASE COURSE BELOW NEW CONCRETE1 NTSVM-5 VENTED COLLECTION PIPING BELOW NEW CONCRETE2 NTSVM-5 BASE COURSE - CLEAN 57 STONE (WASHED WITH NO FINES), MIN 4" THICK BENEATH NEW CONCRETE 3" SCH 40 PVC VENT PIPE SET WITHIN MIN 4" BASE COURSE. VENT PIPE SHALL BE 0.020" SLOTTED PIPE OR 5/8" PERFORATED WITH 5-HOLE SPACED 60 DEGREES APART AND 6" OFF CENTER SOIL SUB-BASE SOIL SUB-BASE MIN 4" NEW CONCRETE SLAB WITH REBAR AND WIRE MESH IN ACCORDANCE WITH STRUCTURAL DRAWINGS. MIN 6" NEW CONCRETE SLAB WITH REBAR AND WIRE MESH IN ACCORDANCE WITH STRUCTURAL DRAWINGS. MIN 15-MIL VAPOR BARRIER MIN 15-MIL VAPOR BARRIER BELOW NEW CONCRETE VIMS SUCTION POINT NTS 3 VM-5 SOLID 3" SCH 40 PVC. LENGTH VARIES, REFER TO SHEET VM-1 3" SCH 40 PVC RISER DUCT PIPE TO ROOFTOP (SEE DETAIL 11) PROPOSED WALL 3" SCH 40 PVC TEE 0.75 TO 1 CU FT CAVITY FILLED WITH CLEAN 57 STONE OR PEA GRAVEL (MIN 18" DEEP AND 10" DIA) 3" VENT CAP PLACED MIN 6" ABOVE BOTTOM OF CAVITYEXISTING SOILS SEAL PENETRATION WITH URETHANE SEALANT, OR SIMILAR EXISTING CONCRETE VIMS TRENCH DETAIL WITH SUCTION POINT NTS 4 VM-5 SOLID 3" SCH 40 PVC. LENGTH VARIES, REFER TO SHEET VM-1 3" SCH 40 PVC RISER DUCT PIPE TO ROOFTOP (SEE DETAIL 11) PROPOSED STUD WALL 3" SCH 40 PVC TEE MIN 1% SLOPE TOWARD EXTRACTION POINT CLEAN 57 STONE AROUND SOLID SECTION OF PIPE 0.75 TO 1 CU FT CAVITY FILLED WITH CLEAN 57 STONE OR PEA GRAVEL (MIN 18" DEEP AND 10" DIA) 3" VENT CAP PLACED MIN 6" ABOVE BOTTOM OF CAVITY EXISTING SOILS SEAL PENETRATION WITH URETHANE SEALANT, OR SIMILAR MIN 4" NEW CONCRETE SLAB WITH REBAR AND WIRE MESH IN ACCORDANCE WITH STRUCTURAL DRAWINGS. MIN 10-MIL MOISTURE BARRIER PLACED AT INTERFACE OF 57 STONE AND NEW CONCRETE VIMS PIPING AND RISER IN AREA WITH NEW CONCRETE NTS 5 VM-5 3" SCH 40 PVC RISER DUCT PIPE INSIDE FURR OUT SOLID TO PERFORATED/SLOTTED 3" SCH 40 PVC PIPE TRANSITION CLEAN 57 STONE, OR SIMILAR, PLACED IN AREA OF NEW SLAB EXISTING SOILS NEW CONCRETE SLAB ACCORDANCE WITH STRUCTURAL DRAWINGS SEAL PENETRATION WITH URETHANE SEALANT, OR SIMILAR 15-MIL VAPOR BARRIER PLACED UNDER AREAS WITH NEW SLAB SEAL COLD JOINT BETWEEN EXISTING CONCRETE AND NEW CONCRETE WITH URETHANE SEALANT, OR SIMILAR EXTERIOR WALL EXISTING CONCRETE 6 NTS VACUUM MONITORING POINT VM-5 EXISTING CONCRETE SLAB FLOOR CLEAN-OUT SET FLUSH WITH FINISHED FLOOR (SEE DETAIL 9) 1" SCH 40 0.020" SLOTTED PVC PIPE WITH OPEN END ON BOTTOM#2 WELLPACK FILTRATION SAND (OR SIMILAR COARSE SAND) EXISTING SUB-SLAB SOIL SEAL JOINT WITH URETHANE SEALANT, OR SIMILAR (SEE SPEC #) 1" EXPANDABLE WELL PLUG POLY-URETHANE SEALANT VAPOR BARRIER SEE DETAIL 7 / VM-5 VACUUM MONITORING POINT FINISHING DETAIL NTSVM-5 7 FLOOR CLEANOUT, ADJUSTABLE, 4" DIA ZURN INDUSTRIES MODEL #CO2450-PV4 FLUSH WITH FINISHED FLOOR 1" EXPANDABLE WELL PLUG #2 WELLPACK FILTRATION SAND (OR SIMILAR COARSE SAND) SEAL JOINT WITH URETHANE SEALANT POLY-URETHANE SEALANT VAPOR BARRIER ELECTRIC EXHAUST FAN AND RISER ON ROOFTOP NTS 9 VM-5 EMPIRE MODEL TV04SS (STAINLESS STEEL) WIND TURBINE VENTILATOR DISCHARGE A MINIMUM OF 10 FT FROM AIR INTAKES OR OPERABLE BUILDING OPENINGS AND MINIMUM 2-FT ABOVE ROOFLINE OR PARAPETS LABEL FAN WITH IDENTIFICATION NUMBER AND "VAPOR MITIGATION SYSTEM - CONTACT MAINTENANCE IF NOT OPERATING", OR SIMILAR WEATHERPROOF 120VAC OUTLET FOR FUTURE HOOK-UP OF ELECTRIC FAN, IF WARRANTED 3" X 4" FLEXIBLE REDUCER / COUPLING 3" SCH 40 PVC RISER SECURE TO ROOF TRUSSES, COLUMNS, OR STUD WALLS DROP CEILING OR EXISTING CEILING TRUSSES WATERTIGHT ROOF FLASHING LABELED RISER PIPE EVERY 10-FT WITH "VAPOR MITIGATION SYSTEM - CONTACT MAINTENANCE" ROOFTOP REFER TO ROOF/CEILING PLAN ON SHEET VM-4 FOR LOCATION OF HORIZONTAL PIPE RUNS WHERE FAN EXHAUST IS OFF-SET FROM RISER UTILITY PENETRATION AT EXTERIOR WALL NTS 11 VM-5 EXTERIOR GRADE VARIES. REFER TO CIVIL AND ARCHITECTURAL PLANS AIR TIGHT SEAL AROUND UTILITY THROUGH EXTERIOR WALL OR FOOTER, AND / OR BACKFILL MINIMUM 3' LENGTH OF TRENCH OF COMPACTED SOILS COMPACTED SOILS AROUND UTILITY AT EXTERIOR PENTRATION EXISTING EXTERIOR WALL AND FOOTER CRUSHED STONE BACKFILL WITHIN UTILITY TRENCH EXISTING SOILS INTERIOR SPACEEXTERIOR SPACE (OPEN AIR) UTILITIES INSTALLED BY OTHERS VIMS EXTRACTION TRENCH CLEAN-OUT NTS 8 VM-5 FLOOR CLEANOUT, ADJUSTABLE, 4" DIA ZURN INDUSTRIES MODEL #CO2450-PV4 FLUSH WITH FINISHED FLOOR 2" EXPANDABLE WELL CAP 3" SCH 40 PVC ALL-HUB 2-WAY CLEANOUT 3" SCH 40 PVC SOLID PIPE 2" SCH 40 PVC PIPE WITH 4" X 2" PVC FLUSH REDUCER BUSHING CLEAN 57 STONE OR COMPACTED SOIL. REFER TO SHEET VM-1. MIN 10-MIL MOISTURE BARRIER PLACED AT INTERFACE OF 57 STONE AND NEW CONCRETE (IF PRESENT) 3" X 2" PVC REDUCER MIN 4" NEW CONCRETE SLAB WITH REBAR AND WIRE MESH IN ACCORDANCE WITH STRUCTURAL DRAWINGS VIMS HORIZONTAL PIPING FOR EXHAUST FAN OFF-SET FROM RISER NTS 10 VM-5 SEE DETAIL 9 (WIND DRIVEN TURBINE FAN) SEE DETAILS 3 TO 6 (VIMS RISER) MIN 1% SLOPE TOWARD EXTRACTION POINT EXISTING CEILLING STEEL TRUSSES ROOFTOP PIPE SUPPORTS PER NC BUILDING CODE SOLID 3" SCH 40 PVC. LENGTH VARIES, REFER TO SHEETS VM-1 & VM-1A 3" SCH 40 PVC 90-DEGREE ELBOW 3" SCH 40 PVC 90-DEGREE ELBOW VIMS SUCTION POINT AT FORMER SUB-SLAB VOID LOCATION (FAN F-3 LOCATION) NTS 3A VM-5 3" SCH 40 PVC RISER DUCT PIPE TO ROOFTOP (SEE DETAIL 11) PROPOSED STUD WALL 3" VENT CAP FORMER SUB-SLAB VOID FILLED 57 STONE SEAL PENETRATION WITH URETHANE SEALANT, OR SIMILAR EXISTING CONCRETE H&H NO. PAM-003 VAPOR INTRUSION MITIGATION SYSTEM (421 E. 26TH ST.) SECTION DETAILS VM-5 TITLE: SHEET: VAPOR INTRUSION MITIGATION PLAN PREPARED BY: 2923 South Tryon Street-Suite 100 Charlotte, North Carolina 28203 704-586-0007(p) 704-586-0373(f) License # C-1269 / #C-245 Geology NOTES: 1.NTS = NOT TO SCALE; 2.SCH = SCHEDULE; 3.VIMS = VAPOR INTRUSION MITIGATION SYSTEM 4.MIN = MINIMUM NO R T H D A V I D S O N I I B R O W N F I E L D S P R O P E R T Y (B R O W N F I E L D S N O . 2 4 0 0 3 - 0 2 - 0 6 0 ) SE O U L F O O D C O M P A N Y 42 1 E A S T 2 6 T H S T R E E T CH A R L O T T E , N O R T H C A R O L I N A PROFESSIONAL APPROVAL / SEAL APRIL 4, 2022 04/04/22 AS-BUILT DRAWING S:\ A A A - M a s t e r P r o j e c t s \ P A M A K A - P A M \ P A M - 0 0 3 N . D a v i d s o n & E . 2 6 t h \ V I M S \ 4 2 1 E 2 6 S t \ I n s t a l l a t i o n R e p o r t \ 4 2 1 E . 2 6 t h S t r e e t _ A S - B U I L T _ 0 3 1 7 2 0 2 2 _ R E V . d w g , 4 / 4 / 2 0 2 2 1 1 : 1 6 : 3 0 A M , D W G T o P D F . p c 3 Appendix C Field Sampling Forms and Documents &Žƌŵ^sͲϭ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͗ ͗ Z͗ ^͗ ͗ Z͗ ^͗ ͗ Z͗ ^͗ ͗ Z͗ ^͗ ͗ Z͗ ^͗ ͗ Z͗ 6 VDPSOH,'& FDQLVWHU,'5 UHJXODWRU,'66 VXEVODE6* VRLOJDV3HUP SHUPDQHQW7HPS WHPSRUDU\ 9ROXPH3XUJHG [SXUJHYROXPHV / D /DVWXSGDWHG +J LQFKHVRIPHUFXU\SSP SDUWVSHUPLOOLRQ 1RWHVBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB 6DPSOH,'7\SH 9DSRU0RQLWRULQJ3RLQW&RQVWUXFWLRQ +HOLXP/HDN7HVW EŽƚĞ͗>ĞĂŬdĞƐƚZĞƋƵŝƌĞŵĞŶƚƐ WĞƌEYtDsĂƉŽƌ/ŶƚƌƵƐŝŽŶ'ƵŝĚĂŶĐĞ͕ůĞĂŬƚĞƐƚƉĂƐƐĞƐŝĨŚĞůŝƵŵ ĐŽŶĐĞŶƚƌĂƚŝŽŶŝŶƉƵƌŐĞĂŝƌŝƐůĞƐƐƚŚĂŶϭϬйŽĨŚĞůŝƵŵĐŽŶĐĞŶƚƌĂƚŝŽŶŝŶ ƐŚƌŽƵĚ͘ / OHQJWKRIWXELQJSLSHIW D IRUGLDPHWHU/IW D IRUGLDPHWHU/IW ͗ͰhƐĞƌƐͰŵǀĂǁƚĞƌͰƌŽƉďŽǆͰǇKƚŚĞƌͰ&ŽƌŵĚŝƚƐͰ/YͲ^^sͰsĂƉŽƌ^ĂŵƉůŝŶŐ&ŽƌŵƐͺsϲ͘Ϭ ^ƵďͲ^ůĂďͬ^Žŝů'ĂƐ^ĂŵƉůŝŶŐsĂƉŽƌ/ŶƐƚĂůůĂƚŝŽŶ&ŝĞůĚ&Žƌŵ ,ĂƌƚΘ,ŝĐŬŵĂŶ͕W PAM-003 AML 70s, partly cloudy P-1 11377 SS Temp Concrete 6 Gravel --Full 5/18/23 1240 71 Pump 1 L 10.6 0 ppm Yes 16213 MP-9 11374 SS Perm Concrete 6 Gravel --Full 5/19/23 1115 62 Pump 1 L 10.6 1025 ppm Yes 13142 MP-3 11356 SS Perm Concrete 6 Gravel --Full 5/19/23 1225 64 Pump 1 L 10.6 2075 ppm Yes 16204 &Žƌŵ^sͲϮ 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3HULRG EŽƚĞ͗ WĞƌEYtDsĂƉŽƌ/ŶƚƌƵƐŝŽŶ'ƵŝĚĂŶĐĞ͕ ƐŚƵƚͲŝŶƚĞƐƚĂŶĚŚĞůŝƵŵůĞĂŬĐŚĞĐŬŵƵƐƚďĞ ƉĂƐƐĞĚďĞĨŽƌĞƐĂŵƉůŝŶŐ͘ ͗ͰhƐĞƌƐͰŵǀĂǁƚĞƌͰƌŽƉďŽǆͰǇKƚŚĞƌͰ&ŽƌŵĚŝƚƐͰ/YͲ^^sͰsĂƉŽƌ^ĂŵƉůŝŶŐ&ŽƌŵƐͺsϲ͘Ϭ ^ƵďͲ^ůĂďͬ^Žŝů'ĂƐ^ĂŵƉůŝŶŐsĂƉŽƌ^ĂŵƉůŝŶŐ&ŝĞůĚ&Žƌŵ ,ĂƌƚΘ,ŝĐŬŵĂŶ͕W PAM-003 AML 70s, partly cloudy P-1 1 L11377 5/18/23 10 100 mL/min 1254 -17 71 45 45 16213 1301 -5 1249 -27 71 MP-9 1 L 1115 -28.5 11374 5/19/23 10 1120 -19 62 65 71 41 100 mL/min13142 1128 -5 MP-3 1230 -28.51 L11356 5/19/23 10 64 64 71 46 16204 100 mL/min 1235 -18.5 1243 -4 &Žƌŵ/^Ͳϭ ,QGRRU$LU6DPSOLQJ)LHOG)RUP 3URMHFW1RBBBBBBBBBBBBBBBBBBB 6DPSOHUBBBBBBBBBBBBBBBBBBBBBB :HDWKHUBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB 'DWH 3URSRVHG 6DPSOLQJ 'XUDWLRQ 7LPH&DQLVWHU 3UHVVXUH 'LIIHUHQWLDO 3UHVVXUH 2XWGRRU 7HPSHUDWXUH 2XWGRRU +XPLGLW\ ,QGRRU 7HPSHUDWXUH ,QGRRU +XPLGLW\ PPGG\\ +RXUV KU +J +2 R)R) ^͗%HJLQQLQJ ͗0LGGOH Z͗(QG ^͗%HJLQQLQJ ͗0LGGOH Z͗(QG ^͗%HJLQQLQJ ͗0LGGOH Z͗(QG ^͗%HJLQQLQJ ͗0LGGOH Z͗(QG ^͗%HJLQQLQJ ͗0LGGOH Z͗(QG ^͗%HJLQQLQJ ͗0LGGOH Z͗(QG 6 VDPSOH,'& FDQLVWHU,'5 UHJXODWRU,' 1RWHQHJDWLYHGLIIHUHQWLDOSUHVVXUHLQGLFDWHVWKDWLQGRRUSUHVVXUHZDVORZHUWKDQSUHVVXUHRXWGRRUV/DVWXSGDWHG +J LQFKHVRIPHUFXU\+2 LQFKHVRIZDWHUFROXPQ 7LPH(671RWHVBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB 3UHFLSLWDWLRQLQFKHVBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB %DURPHWULF3UHVVXUH+JBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB :LQG'LUHFWLRQBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB :LQG6SHHGPSKBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB ^ŝǌĞ͗ &ůŽǁZĂƚĞ͗ ^ŝǌĞ͗ &ůŽǁZĂƚĞ͗ ^ŝǌĞ͗ &ůŽǁZĂƚĞ͗ ^ŝǌĞ͗ &ůŽǁZĂƚĞ͗ ,QGRRU3DUDPHWHUV 6DPSOLQJ 3HULRG 6DPSOLQJ,QIRUPDWLRQ 2XWGRRU3DUDPHWHUV 6DPSOH,' ^ŝǌĞ͗ &ůŽǁZĂƚĞ͗ ^ŝǌĞ͗ &ůŽǁZĂƚĞ͗ ͗ͰhƐĞƌƐͰŵǀĂǁƚĞƌͰƌŽƉďŽǆͰǇKƚŚĞƌͰ&ŽƌŵĚŝƚƐͰ/YͲ^^sͰsĂƉŽƌ^ĂŵƉůŝŶŐ&ŽƌŵƐͺsϲ͘Ϭ /ŶĚŽŽƌŝƌ^ĂŵƉůŝŶŐ&ŝĞůĚ&Žƌŵ ,ĂƌƚΘ,ŝĐŬŵĂŶ͕W PAM-003 AML 70s, partly cloudy IAS-1 0924 -28 0.000 72 31 73 676 L28744 5/17/23 8 1350 -16.5 0.000 79 40 70 63 14326 12.5 1724 -7 0.000 82 53 73 47 IAS-DUP 0924 -28 0.000 72 31 73 676 L42652 5/17/23 8 1350 -16.5 0.000 79 40 70 63 14326 12.5 1724 -7 0.000 82 53 73 47 IAS-2 0923 -30 0.000 72 31 73 676 L36110 5/17/23 8 1350 -17.5 0.000 79 40 70 63 14307 12.5 1724 -6 0.000 82 53 73 47 IAS-3 0922 -29 0.000 72 31 73 676 L37255 5/17/23 8 1351 -16.5 0.000 79 40 70 63 14298 12.5 1726 -6 0.000 82 53 73 47 P-1 0925 -30 0.000 72 31 72 726 L42644 5/17/23 8 1353 -17 0.000 79 40 70 6312.514296 1730 -8 0.000 82 53 79 64 BKG-051723 0921 -29 0.000 72 31 -- --6 L46853 5/17/23 8 1354 -18 0.000 79 40 -- -- 17726 12.5 1726 -7.5 0.000 82 53 -- -- 0930 1400 1730 0 0 0 29.76 29.84 29.80 NNE NNE NNE 6 8 11 INDOOR AIR BUILDING SURVEY and SAMPLING FORM Site Name: ____________________________________ DSCAID#: ______________________ Preparer’s name: ________________________________ Date: __________________________ Preparer’s affiliation: ____________________________ Phone #: _______________________ Part I - Occupants Building Address: ____________________________________________________________________ Property Contact: _______________________________ Owner / Renter / other: ______________ Contact’s Phone: home ( )__________ work ( )______________ cell ( )____________ # of Building occupants: Children under age 13 _____ Children age 13-18 ______ Adults _____ Part II – Building Characteristics Building type: Describe building: ________________________________________ Year constructed: _________ Sensitive population:2WKHU(specify): _______________ Number of floors below grade: ______ Number of floors at or above grade: ______ Depth of basement below grade surface: ______ ft. Basement size: _______ ft2 Basement floor construction: Foundation walls: Basement sump present?<HV1RSumppump?<HV1R Rther (specify): ________________ other(specify)_______________B Water in sump?<HV1R Type of heating system (cKHFN all that apply): hot air circulation hot air radiation wood steam radiation heat pump hot water radiation kerosene heater electric baseboard other (specify): ________________________ Type of ventilation system (cKHFN all that apply): bathroom ventilation fans outside air intake central air conditioning mechanical fans individual air conditioning units kitchen range hood fan other (specify): _________________ Type of fuel utilized (cKHFN all that apply): Natural gas electric fuel oil wood coal solar kerosene Are the basement walls or floor sealed with waterproof paint or epoxy coatings? <HV1R # of occupants varies throughout day (restaurant) Pamaka (Seoul Food Company building)(BF) 24003-20-060 Ann Marie Lindley 5/17/23 H&H (704) 586-0007 421 E 26th St. Charlotte, NC Paul Kardous Owner Restaurant 2022 0 1 Commercial one Concrete Cinder Blocks other (specify) _____________ Is there a whole house fan?<HV1R Septic system? <HV<HV%XWQRWXVHG1R Irrigation/private well? <HV<HV%XWQRWXVHG1R Type of ground cover outside of building:BBBBBBBBBBBBBBBBBBBBB Existing subsurface depressurization (radon) system in place?<HV1R 7\SHBBBBBBBBBBBB Sub-slab vapor/moisture barrier in place? <HV1R Type of barrier: ____________________________BBBBBBBBBBBBBBB Part III - Outside Contaminant Sources Other stationary sources nearby (gas stations, emission stacks, etc.): _____________________________ Heavy vehicular traffic nearby (or other mobile sources): ______________________________________ Part IV – Indoor Contaminant Sources Identify all potential indoor sources found in the building (including attached garages), the location of the source (floor and room), and whether the item was removed from the building 48 hours prior to indoor air sampling event. Any ventilation implemented after removal of the items should be completed at least 24 hours prior to the commencement of the indoor air sampling event. Potential Sources Location(s)Removed (Yes / No / NA) Gasoline storage cans Gas-powered equipment Kerosene storage cans Paints / thinners / strippers Cleaning solvents Oven cleaners Carpet / upholstery cleaners Other house cleaning products Moth balls Polishes / waxes Insecticides Furniture / floor polish Nail polish / polish remover Hairspray Cologne / perfume Air fresheners Fuel tank (inside building) Wood stove or fireplace New furniture / upholstery New carpeting / flooring Hobbies - glues, paints, etc. As halt &rass NA N. Davidson St. and train tracks N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Concrete Enhanced assiv Ste o 15-mil Part V – Miscellaneous Items Do any occupants of the building smoke?<HV1RHow often? ______________ Last time someone smoked in the building? ____________ hours days ago Does the building have an attached garage directly connected to living space?<HV1R If so, is a car usually parked in the garage?<HV1R Are gas-powered equipment or cans of gasoline/fuels stored in the garage?<HV1R Do the occupants of the building have their clothes dry cleaned? <HV 1R If yes, how often?:HHNO\0RQWKO\7LPHVSHU\HDU Do any of the occupants use solvents in work?<HV1R If yes, what types of solvents are used? _______________________________________ If yes, are their clothes washed at work?<HV1R +DYHDQ\SHVWLFLGHVKHUELFLGHVEHHQDSSOLHGDURXQGWKHEXLOGLQJRULQWKH\DUG"<HV1R If so, when and which chemicals? _________________________________________________ Has there ever been a fire in the building?<HV1R If yes, when? _____________ Has painting or staining been done in the building in the last 6 months?Yes No If yes, when __________________ and where? ____________________________ Part VI – Sampling Information Sample Technician: ____________________________ Phone number:) _______ - __________ Sample SourceFKHFNDOOWKDWDSSO\ ,QGRRU$LU&UDZOVSDFH$LU6XE6ODE1HDU6ODE6RLO*DV([WHULRU6RLO*DV Sampler TypeFKHFNDOOWKDWDSSO\ 7HGODU%DJ6RUEHQW6WDLQOHVV6WHHO&DQLVWHUOther (specify): _________________ Analytical Method:BBBBBBBBBBBBBBBBB2ther: _____________ Cert. Laboratory:BBBBBBBBBBBBB Sample locations (floor, room):BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB Field ID # _____ - ________________________Field ID # _____B-__________________________ Field ID #BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB)LHOG,'BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB Were “Instructions for Occupants” followed? ,IQRWGHVFULEHPRGLILFDWLRQVBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB unknown Ann Marie Lindley 6588606 Waypoint IAS 1, 2 BKG 1 restaurant, pavilion (P-1) and outside (BKG) 1, 2, 3, 4 MP P1 TO-15 Provide Drawing of Sample Location(s) in Building Part VII - Meteorological Conditions Was there significant precipitation within 12 hours prior to (or during) the sampling event?Yes No Describe the general weather conditions: _________________________________________________ _____________________________________________________________________________________ Part VIII – General Observations Provide any information that may be pertinent to the sampling event and may assist in the data interpretation process (e.g., observed that drycleaner operated with door or windows propped open for ventilation). (Adapted from the NJDEP Vapor Intrusion Guidance, October 2005) 70s, partly cloudy, light wind Doors frequently opened for restaurant customers Appendix D Laboratory Analytical Reports Laboratory's liability in any claim relating to analyses performed shall be limited to, at laboratory's option, repeating the analysis in question at laboratory's expense, or the refund of the charges paid for performance of said analysis. 5/30/2023 Hart & Hickman (Charlotte) Dave Kahn 2923 South Tryon St. Ste 100 Charlotte, NC, 28203 Ref: Analytical Testing Lab Report Number: 23-139-0102 Client Project Description: PAM-003 Dear Dave Kahn: Waypoint Analytical, LLC (Charlotte) received sample(s) on 5/19/2023 for the analyses presented in the following report. The above referenced project has been analyzed per your instructions. The analyses were performed in accordance with the applicable analytical method. The analytical data has been validated using standard quality control measures performed as required by the analytical method. Quality Assurance, method validations, instrumentation maintenance and calibration for all parameters were performed in accordance with guidelines established by the USEPA (including 40 CFR 136 Method Update Rule May 2021) unless otherwise indicated. Certain parameters (chlorine, pH, dissolved oxygen, sulfite...) are required to be analyzed within 15 minutes of sampling. Usually, but not always, any field parameter analyzed at the laboratory is outside of this holding time. Refer to sample analysis time for confirmation of holding time compliance. The results are shown on the attached Report of Analysis(s). Results for solid matrices are reported on an as-received basis unless otherwise indicated. This report shall not be reproduced except in full and relates only to the samples included in this report. Please do not hesitate to contact me or client services if you have any questions or need additional information. Sincerely, Angela D Overcash Senior Project Manager Page 1 of 50 Certification Summary Laboratory ID: WP CNC: Waypoint Analytical Carolina, Inc. (C), Charlotte, NC State Program Lab ID Expiration Date 07/31/202337735State ProgramNorth Carolina 12/31/2023402State ProgramNorth Carolina 07/31/202399012State ProgramSouth Carolina 12/31/202299012State ProgramSouth Carolina Page 1 of 1 00016/23-139-0102 Page 2 of 50 Report Number: Sample Summary Table Client Project Description: 23-139-0102 PAM-003 Lab No Client Sample ID Matrix Date Collected Date Received 05/17/2023Air 96673 IAS-DUP 05/19/2023 14:15 05/17/2023 09:24Air 96674 IAS-1 05/19/2023 14:15 05/17/2023 09:23Air 96675 IAS-2 05/19/2023 14:15 05/17/2023 09:22Air 96676 IAS-3 05/19/2023 14:15 05/17/2023 09:21Air 96677 BKG-051726 05/19/2023 14:15 05/17/2023 09:25Air 96678 P-1 05/19/2023 14:15 05/18/2023 12:49Air 96679 P-1 05/19/2023 14:15 05/19/2023 11:15Air 96680 MP-9 05/19/2023 14:15 05/19/2023 12:30Air 96681 MP-3 05/19/2023 14:15 Page 3 of 50 Summary of Detected Analytes QualifiersAnalyzedUnitsResult Report Number: Client Sample ID Method Parameters Lab Sample ID 23-139-0102 Report Limit Project:PAM-003 V 96673IAS-DUP 14.9 05/24/2023 19:43TO-15 Acetone µg/m3 0.202 J0.370 05/24/2023 19:43TO-15 Benzene µg/m3 0.073 2.62 05/24/2023 19:43TO-15 Chloroform µg/m3 0.086 J0.768 05/24/2023 19:43TO-15 Chloromethane µg/m3 0.067 2.49 05/24/2023 19:43TO-15 Dichlorodifluoromethane µg/m3 0.134 2.32 05/24/2023 19:43TO-15 Ethyl Acetate µg/m3 0.136 J0.688 05/24/2023 19:43TO-15 Heptane µg/m3 0.143 J0.613 05/24/2023 19:43TO-15 n-Hexane µg/m3 0.047 J1.37 05/24/2023 19:43TO-15 Isopropyl Alcohol µg/m3 0.139 1.86 05/24/2023 19:43TO-15 Methyl Ethyl Ketone (MEK)µg/m3 0.224 2.34 05/24/2023 19:43TO-15 Styrene µg/m3 0.124 J0.678 05/24/2023 19:43TO-15 Tetrachloroethene µg/m3 0.181 J0.468 05/24/2023 19:43TO-15 Tetrahydrofuran µg/m3 0.107 J1.33 05/24/2023 19:43TO-15 Toluene µg/m3 0.090 J1.78 05/24/2023 19:43TO-15 Trichlorofluoromethane µg/m3 0.130 J1.92 05/24/2023 19:43TO-15 1,2,4-Trimethylbenzene µg/m3 0.110 J0.653 05/24/2023 19:43TO-15 1,3,5-Trimethylbenzene µg/m3 0.236 V 96674IAS-1 14.4 05/24/2023 20:33TO-15 Acetone µg/m3 0.202 J0.383 05/24/2023 20:33TO-15 Benzene µg/m3 0.073 JB1.31 05/24/2023 20:33TO-15 Carbon Disulfide µg/m3 0.060 3.17 05/24/2023 20:33TO-15 Chloroform µg/m3 0.086 J0.753 05/24/2023 20:33TO-15 Chloromethane µg/m3 0.067 2.53 05/24/2023 20:33TO-15 Dichlorodifluoromethane µg/m3 0.134 2.37 05/24/2023 20:33TO-15 Ethyl Acetate µg/m3 0.136 J0.631 05/24/2023 20:33TO-15 Heptane µg/m3 0.143 J0.641 05/24/2023 20:33TO-15 n-Hexane µg/m3 0.047 J1.60 05/24/2023 20:33TO-15 Isopropyl Alcohol µg/m3 0.139 1.80 05/24/2023 20:33TO-15 Methyl Ethyl Ketone (MEK)µg/m3 0.224 2.39 05/24/2023 20:33TO-15 Styrene µg/m3 0.124 J0.386 05/24/2023 20:33TO-15 Tetrahydrofuran µg/m3 0.107 J1.39 05/24/2023 20:33TO-15 Toluene µg/m3 0.090 J1.70 05/24/2023 20:33TO-15 Trichlorofluoromethane µg/m3 0.130 J1.94 05/24/2023 20:33TO-15 1,2,4-Trimethylbenzene µg/m3 0.110 J0.722 05/24/2023 20:33TO-15 1,3,5-Trimethylbenzene µg/m3 0.236 Page 4 of 50 Summary of Detected Analytes QualifiersAnalyzedUnitsResult Report Number: Client Sample ID Method Parameters Lab Sample ID 23-139-0102 Report Limit Project:PAM-003 V 96675IAS-2 17.9 05/24/2023 21:23TO-15 Acetone µg/m3 0.202 J0.408 05/24/2023 21:23TO-15 Benzene µg/m3 0.073 7.56 05/24/2023 21:23TO-15 Chloroform µg/m3 0.086 J0.755 05/24/2023 21:23TO-15 Chloromethane µg/m3 0.067 J2.35 05/24/2023 21:23TO-15 Dichlorodifluoromethane µg/m3 0.134 2.57 05/24/2023 21:23TO-15 Ethyl Acetate µg/m3 0.136 J0.639 05/24/2023 21:23TO-15 Heptane µg/m3 0.143 J0.613 05/24/2023 21:23TO-15 n-Hexane µg/m3 0.047 J0.978 05/24/2023 21:23TO-15 Isopropyl Alcohol µg/m3 0.139 2.06 05/24/2023 21:23TO-15 Methyl Ethyl Ketone (MEK)µg/m3 0.224 J1.35 05/24/2023 21:23TO-15 Styrene µg/m3 0.124 J0.353 05/24/2023 21:23TO-15 Tetrahydrofuran µg/m3 0.107 2.40 05/24/2023 21:23TO-15 Toluene µg/m3 0.090 J1.46 05/24/2023 21:23TO-15 Trichlorofluoromethane µg/m3 0.130 J0.560 05/24/2023 21:23TO-15 1,2,4-Trimethylbenzene µg/m3 0.110 V 96676IAS-3 16.7 05/24/2023 22:13TO-15 Acetone µg/m3 0.202 J0.389 05/24/2023 22:13TO-15 Benzene µg/m3 0.073 J1.34 05/24/2023 22:13TO-15 Chloroform µg/m3 0.086 J0.689 05/24/2023 22:13TO-15 Chloromethane µg/m3 0.067 J2.31 05/24/2023 22:13TO-15 Dichlorodifluoromethane µg/m3 0.134 J0.724 05/24/2023 22:13TO-15 Ethyl Acetate µg/m3 0.136 J0.408 05/24/2023 22:13TO-15 4-Ethyltoluene µg/m3 0.128 J0.418 05/24/2023 22:13TO-15 Heptane µg/m3 0.143 J0.563 05/24/2023 22:13TO-15 n-Hexane µg/m3 0.047 J0.235 05/24/2023 22:13TO-15 Isopropyl Alcohol µg/m3 0.139 J1.42 05/24/2023 22:13TO-15 Methyl Ethyl Ketone (MEK)µg/m3 0.224 J1.38 05/24/2023 22:13TO-15 Styrene µg/m3 0.124 J1.23 05/24/2023 22:13TO-15 Toluene µg/m3 0.090 J1.39 05/24/2023 22:13TO-15 Trichlorofluoromethane µg/m3 0.130 J2.35 05/24/2023 22:13TO-15 1,2,4-Trimethylbenzene µg/m3 0.110 J0.806 05/24/2023 22:13TO-15 1,3,5-Trimethylbenzene µg/m3 0.236 V 96677BKG-051726 20.1 05/24/2023 23:06TO-15 Acetone µg/m3 0.202 J0.421 05/24/2023 23:06TO-15 Benzene µg/m3 0.073 J0.747 05/24/2023 23:06TO-15 Chloromethane µg/m3 0.067 Page 5 of 50 Summary of Detected Analytes QualifiersAnalyzedUnitsResult Report Number: Client Sample ID Method Parameters Lab Sample ID 23-139-0102 Report Limit Project:PAM-003 V 96677BKG-051726 J2.37 05/24/2023 23:06TO-15 Dichlorodifluoromethane µg/m3 0.134 J0.549 05/24/2023 23:06TO-15 Heptane µg/m3 0.143 J0.807 05/24/2023 23:06TO-15 n-Hexane µg/m3 0.047 J1.05 05/24/2023 23:06TO-15 Methyl Ethyl Ketone (MEK)µg/m3 0.224 3.89 05/24/2023 23:06TO-15 Naphthalene µg/m3 0.183 J1.67 05/24/2023 23:06TO-15 Toluene µg/m3 0.090 J1.53 05/24/2023 23:06TO-15 Trichlorofluoromethane µg/m3 0.130 V 96678P-1 138 05/26/2023 18:46TO-15 Acetone µg/m3 1.01 J0.527 05/26/2023 00:03TO-15 Benzene µg/m3 0.073 J0.258 05/26/2023 00:03TO-15 Carbon Disulfide µg/m3 0.060 J0.706 05/26/2023 00:03TO-15 Chloromethane µg/m3 0.067 J2.32 05/26/2023 00:03TO-15 Dichlorodifluoromethane µg/m3 0.134 J0.831 05/26/2023 00:03TO-15 Heptane µg/m3 0.143 J0.641 05/26/2023 00:03TO-15 n-Hexane µg/m3 0.047 J1.50 05/26/2023 00:03TO-15 2-Hexanone µg/m3 0.285 15.2 05/26/2023 00:03TO-15 Isopropyl Alcohol µg/m3 0.139 9.54 05/26/2023 00:03TO-15 Methyl Ethyl Ketone (MEK)µg/m3 0.224 J0.421 05/26/2023 00:03TO-15 4-Methyl-2-Pentanone µg/m3 0.121 J0.786 05/26/2023 00:03TO-15 Propene µg/m3 0.242 J0.711 05/26/2023 00:03TO-15 Styrene µg/m3 0.124 J0.746 05/26/2023 00:03TO-15 Tetrachloroethene µg/m3 0.181 1.72 05/26/2023 00:03TO-15 Tetrahydrofuran µg/m3 0.107 6.90 05/26/2023 00:03TO-15 Toluene µg/m3 0.090 J1.37 05/26/2023 00:03TO-15 Trichlorofluoromethane µg/m3 0.130 J0.491 05/26/2023 00:03TO-15 1,2,4-Trimethylbenzene µg/m3 0.110 J0.494 05/26/2023 00:03TO-15 o-Xylene µg/m3 0.157 J0.494 05/26/2023 00:03TO-15 Xylene (Total)µg/m3 0.157 V 96679P-1 6.71 05/25/2023 17:42TO-15 Acetone µg/m3 0.202 J0.338 05/25/2023 17:42TO-15 Benzene µg/m3 0.073 J1.75 05/25/2023 17:42TO-15 Carbon Disulfide µg/m3 0.060 3.51 05/25/2023 17:42TO-15 Chloroform µg/m3 0.086 12.5 05/25/2023 17:42TO-15 Dichlorodifluoromethane µg/m3 0.134 J0.327 05/25/2023 17:42TO-15 n-Hexane µg/m3 0.047 J1.21 05/25/2023 17:42TO-15 Isopropyl Alcohol µg/m3 0.139 Page 6 of 50 Summary of Detected Analytes QualifiersAnalyzedUnitsResult Report Number: Client Sample ID Method Parameters Lab Sample ID 23-139-0102 Report Limit Project:PAM-003 V 96679P-1 J0.751 05/25/2023 17:42TO-15 Methyl Ethyl Ketone (MEK)µg/m3 0.224 2.07 05/25/2023 17:42TO-15 Methylene Chloride µg/m3 0.488 J1.46 05/25/2023 17:42TO-15 Naphthalene µg/m3 0.183 63.8 05/25/2023 17:42TO-15 Tetrachloroethene µg/m3 0.181 J0.327 05/25/2023 17:42TO-15 Tetrahydrofuran µg/m3 0.107 J1.13 05/25/2023 17:42TO-15 Toluene µg/m3 0.090 J2.54 05/25/2023 17:42TO-15 1,1,1-Trichloroethane µg/m3 0.144 3.57 05/25/2023 17:42TO-15 Trichlorofluoromethane µg/m3 0.130 J1.06 05/25/2023 17:42TO-15 1,2,4-Trimethylbenzene µg/m3 0.110 V 96680MP-9 9.99 05/25/2023 18:37TO-15 Acetone µg/m3 0.202 J0.396 05/25/2023 18:37TO-15 Benzene µg/m3 0.073 J1.08 05/25/2023 18:37TO-15 Carbon Disulfide µg/m3 0.060 J0.527 05/25/2023 18:37TO-15 Chloroform µg/m3 0.086 J2.42 05/25/2023 18:37TO-15 Dichlorodifluoromethane µg/m3 0.134 J0.542 05/25/2023 18:37TO-15 Ethylbenzene µg/m3 0.106 19.9 05/25/2023 18:37TO-15 4-Ethyltoluene µg/m3 0.128 J0.401 05/25/2023 18:37TO-15 n-Hexane µg/m3 0.047 J0.228 05/25/2023 18:37TO-15 Isopropyl Alcohol µg/m3 0.139 J1.35 05/25/2023 18:37TO-15 Methyl Ethyl Ketone (MEK)µg/m3 0.224 J2.01 05/25/2023 18:37TO-15 4-Methyl-2-Pentanone µg/m3 0.121 2.66 05/25/2023 18:37TO-15 Methylene Chloride µg/m3 0.488 J0.477 05/25/2023 18:37TO-15 Naphthalene µg/m3 0.183 J0.613 05/25/2023 18:37TO-15 Styrene µg/m3 0.124 11.7 05/25/2023 18:37TO-15 Tetrachloroethene µg/m3 0.181 1.57 05/25/2023 18:37TO-15 Tetrahydrofuran µg/m3 0.107 J1.42 05/25/2023 18:37TO-15 Toluene µg/m3 0.090 J1.34 05/25/2023 18:37TO-15 1,1,1-Trichloroethane µg/m3 0.144 131 05/25/2023 18:37TO-15 Trichloroethene µg/m3 0.199 J1.78 05/25/2023 18:37TO-15 Trichlorofluoromethane µg/m3 0.130 168 05/25/2023 18:37TO-15 1,2,4-Trimethylbenzene µg/m3 0.110 88.1 05/25/2023 18:37TO-15 1,3,5-Trimethylbenzene µg/m3 0.236 2.87 05/25/2023 18:37TO-15 o-Xylene µg/m3 0.157 J0.460 05/25/2023 18:37TO-15 m,p-Xylene µg/m3 0.217 J3.33 05/25/2023 18:37TO-15 Xylene (Total)µg/m3 0.157 Page 7 of 50 Summary of Detected Analytes QualifiersAnalyzedUnitsResult Report Number: Client Sample ID Method Parameters Lab Sample ID 23-139-0102 Report Limit Project:PAM-003 V 96681MP-3 8.30 05/25/2023 19:29TO-15 Acetone µg/m3 0.202 J0.472 05/25/2023 19:29TO-15 Benzene µg/m3 0.073 J0.491 05/25/2023 19:29TO-15 Carbon Disulfide µg/m3 0.060 5.22 05/25/2023 19:29TO-15 Chloroform µg/m3 0.086 J0.685 05/25/2023 19:29TO-15 Chloromethane µg/m3 0.067 J2.27 05/25/2023 19:29TO-15 Dichlorodifluoromethane µg/m3 0.134 J0.586 05/25/2023 19:29TO-15 Ethylbenzene µg/m3 0.106 J0.673 05/25/2023 19:29TO-15 4-Ethyltoluene µg/m3 0.128 J0.315 05/25/2023 19:29TO-15 Heptane µg/m3 0.143 J0.613 05/25/2023 19:29TO-15 n-Hexane µg/m3 0.047 J2.49 05/25/2023 19:29TO-15 Isopropyl Alcohol µg/m3 0.139 J1.11 05/25/2023 19:29TO-15 Methyl Ethyl Ketone (MEK)µg/m3 0.224 2.10 05/25/2023 19:29TO-15 Methylene Chloride µg/m3 0.488 5.18 05/25/2023 19:29TO-15 Styrene µg/m3 0.124 1.86 05/25/2023 19:29TO-15 Tetrahydrofuran µg/m3 0.107 2.13 05/25/2023 19:29TO-15 Toluene µg/m3 0.090 J0.548 05/25/2023 19:29TO-15 Trichloroethene µg/m3 0.199 J1.42 05/25/2023 19:29TO-15 Trichlorofluoromethane µg/m3 0.130 13.3 05/25/2023 19:29TO-15 1,2,4-Trimethylbenzene µg/m3 0.110 4.51 05/25/2023 19:29TO-15 1,3,5-Trimethylbenzene µg/m3 0.236 J0.792 05/25/2023 19:29TO-15 Vinyl Acetate µg/m3 0.224 J0.907 05/25/2023 19:29TO-15 o-Xylene µg/m3 0.157 J0.907 05/25/2023 19:29TO-15 Xylene (Total)µg/m3 0.157 Page 8 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-DUP 96673 Matrix: 5/17/2023 0:00 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 14.9 µg/m3 0.202 4.75Acetone 1 05/24/23 19:43 V33674ENM 0.370 J µg/m3 0.073 1.60Benzene 1 05/24/23 19:43 V33674ENM <0.147 µg/m3 0.147 10.4Benzyl Chloride 1 05/24/23 19:43 V33674ENM <0.150 µg/m3 0.150 3.35Bromodichloromethane 1 05/24/23 19:43 V33674ENM <0.153 µg/m3 0.153 5.17Bromoform 1 05/24/23 19:43 V33674ENM <0.115 µg/m3 0.115 1.94Bromomethane 1 05/24/23 19:43 V33674ENM <0.328 µg/m3 0.328 1.111,3-Butadiene 1 05/24/23 19:43 V33674ENM <0.060 µg/m3 0.060 6.23Carbon Disulfide 1 05/24/23 19:43 V33674ENM <0.155 µg/m3 0.155 3.15Carbon Tetrachloride 1 05/24/23 19:43 V33674ENM <0.107 µg/m3 0.107 2.30Chlorobenzene 1 05/24/23 19:43 V33674ENM <0.208 µg/m3 0.208 4.26Chlorodibromomethane 1 05/24/23 19:43 V33674ENM <0.164 µg/m3 0.164 1.32Chloroethane 1 05/24/23 19:43 V33674ENM 2.62 µg/m3 0.086 2.44Chloroform 1 05/24/23 19:43 V33674ENM 0.768 J µg/m3 0.067 1.03Chloromethane 1 05/24/23 19:43 V33674ENM <0.161 µg/m3 0.161 3.44Cyclohexane 1 05/24/23 19:43 V33674ENM <0.151 µg/m3 0.151 3.841,2-Dibromoethane 1 05/24/23 19:43 V33674ENM <0.096 µg/m3 0.096 3.011,2-Dichlorobenzene 1 05/24/23 19:43 V33674ENM <0.174 µg/m3 0.174 12.01,3-Dichlorobenzene 1 05/24/23 19:43 V33674ENM <0.186 µg/m3 0.186 3.011,4-Dichlorobenzene 1 05/24/23 19:43 V33674ENM 2.49 µg/m3 0.134 2.47Dichlorodifluoromethane 1 05/24/23 19:43 V33674ENM <0.101 µg/m3 0.101 2.021,1-Dichloroethane 1 05/24/23 19:43 V33674ENM <0.129 µg/m3 0.129 2.021,2-Dichloroethane 1 05/24/23 19:43 V33674ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 9 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-DUP 96673 Matrix: 5/17/2023 0:00 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 <0.107 µg/m3 0.107 1.981,1-Dichloroethene 1 05/24/23 19:43 V33674ENM <0.095 µg/m3 0.095 1.98cis-1,2-Dichloroethene 1 05/24/23 19:43 V33674ENM <0.108 µg/m3 0.108 1.98trans-1,2-Dichloroethene 1 05/24/23 19:43 V33674ENM <0.205 µg/m3 0.205 2.311,2-Dichloropropane 1 05/24/23 19:43 V33674ENM <0.622 µg/m3 0.622 3.501,2-Dichlorotetrafluoroethane 1 05/24/23 19:43 V33674ENM <0.178 µg/m3 0.178 2.27cis-1,3-Dichloropropene 1 05/24/23 19:43 V33674ENM <0.178 µg/m3 0.178 2.27trans-1,3-Dichloropropene 1 05/24/23 19:43 V33674ENM <0.435 µg/m3 0.435 1.801,4-Dioxane 1 05/24/23 19:43 V33674ENM 2.32 µg/m3 0.136 1.80Ethyl Acetate 1 05/24/23 19:43 V33674ENM <0.106 µg/m3 0.106 2.17Ethylbenzene 1 05/24/23 19:43 V33674ENM <0.128 µg/m3 0.128 2.464-Ethyltoluene 1 05/24/23 19:43 V33674ENM <0.561 µg/m3 0.561 3.831,1,2-Trichloro-1,2,2-trifluoroethane 1 05/24/23 19:43 V33674ENM 0.688 J µg/m3 0.143 2.05Heptane 1 05/24/23 19:43 V33674ENM <0.330 µg/m3 0.330 5.33Hexachlorobutadiene 1 05/24/23 19:43 V33674ENM 0.613 J µg/m3 0.047 1.76n-Hexane 1 05/24/23 19:43 V33674ENM <0.285 µg/m3 0.285 2.052-Hexanone 1 05/24/23 19:43 V33674ENM 1.37 J µg/m3 0.139 4.92Isopropyl Alcohol 1 05/24/23 19:43 V33674ENM 1.86 µg/m3 0.224 1.47Methyl Ethyl Ketone (MEK)1 05/24/23 19:43 V33674ENM <0.033 µg/m3 0.033 1.80Methyl tert-butyl ether (MTBE)1 05/24/23 19:43 V33674ENM <0.121 µg/m3 0.121 2.054-Methyl-2-Pentanone 1 05/24/23 19:43 V33674ENM <0.488 µg/m3 0.488 1.74Methylene Chloride 1 05/24/23 19:43 V33674ENM <0.183 µg/m3 0.183 2.62Naphthalene 1 05/24/23 19:43 V33674ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 10 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-DUP 96673 Matrix: 5/17/2023 0:00 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 <0.242 µg/m3 0.242 0.860Propene 1 05/24/23 19:43 V33674ENM 2.34 µg/m3 0.124 2.13Styrene 1 05/24/23 19:43 V33674ENM <0.104 µg/m3 0.104 3.431,1,2,2-Tetrachloroethane 1 05/24/23 19:43 V33674ENM 0.678 J µg/m3 0.181 3.39Tetrachloroethene 1 05/24/23 19:43 V33674ENM 0.468 J µg/m3 0.107 1.47Tetrahydrofuran 1 05/24/23 19:43 V33674ENM 1.33 J µg/m3 0.090 1.88Toluene 1 05/24/23 19:43 V33674ENM <0.209 µg/m3 0.209 3.711,2,4-Trichlorobenzene 1 05/24/23 19:43 V33674ENM <0.144 µg/m3 0.144 2.731,1,1-Trichloroethane 1 05/24/23 19:43 V33674ENM <0.087 µg/m3 0.087 2.731,1,2-Trichloroethane 1 05/24/23 19:43 V33674ENM <0.199 µg/m3 0.199 2.15Trichloroethene 1 05/24/23 19:43 V33674ENM 1.78 J µg/m3 0.130 2.81Trichlorofluoromethane 1 05/24/23 19:43 V33674ENM 1.92 J µg/m3 0.110 2.461,2,4-Trimethylbenzene 1 05/24/23 19:43 V33674ENM 0.653 J µg/m3 0.236 2.461,3,5-Trimethylbenzene 1 05/24/23 19:43 V33674ENM <0.224 µg/m3 0.224 1.76Vinyl Acetate 1 05/24/23 19:43 V33674ENM <0.127 µg/m3 0.127 1.28Vinyl Chloride 1 05/24/23 19:43 V33674ENM <0.157 µg/m3 0.157 2.17o-Xylene 1 05/24/23 19:43 V33674ENM <0.217 µg/m3 0.217 5.65m,p-Xylene 1 05/24/23 19:43 V33674ENM <0.157 µg/m3 0.157 2.17Xylene (Total)1 05/24/23 19:43 V33674 Surrogate: 4-Bromofluorobenzene 88.5 Limits: 70-130%05/24/23 19:431 ENM V33674 Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 11 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-1 96674 Matrix: 5/17/2023 9:24 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 14.4 µg/m3 0.202 4.75Acetone 1 05/24/23 20:33 V33674ENM 0.383 J µg/m3 0.073 1.60Benzene 1 05/24/23 20:33 V33674ENM <0.147 µg/m3 0.147 10.4Benzyl Chloride 1 05/24/23 20:33 V33674ENM <0.150 µg/m3 0.150 3.35Bromodichloromethane 1 05/24/23 20:33 V33674ENM <0.153 µg/m3 0.153 5.17Bromoform 1 05/24/23 20:33 V33674ENM <0.115 µg/m3 0.115 1.94Bromomethane 1 05/24/23 20:33 V33674ENM <0.328 µg/m3 0.328 1.111,3-Butadiene 1 05/24/23 20:33 V33674ENM 1.31 JB µg/m3 0.060 6.23Carbon Disulfide 1 05/24/23 20:33 V33674ENM <0.155 µg/m3 0.155 3.15Carbon Tetrachloride 1 05/24/23 20:33 V33674ENM <0.107 µg/m3 0.107 2.30Chlorobenzene 1 05/24/23 20:33 V33674ENM <0.208 µg/m3 0.208 4.26Chlorodibromomethane 1 05/24/23 20:33 V33674ENM <0.164 µg/m3 0.164 1.32Chloroethane 1 05/24/23 20:33 V33674ENM 3.17 µg/m3 0.086 2.44Chloroform 1 05/24/23 20:33 V33674ENM 0.753 J µg/m3 0.067 1.03Chloromethane 1 05/24/23 20:33 V33674ENM <0.161 µg/m3 0.161 3.44Cyclohexane 1 05/24/23 20:33 V33674ENM <0.151 µg/m3 0.151 3.841,2-Dibromoethane 1 05/24/23 20:33 V33674ENM <0.096 µg/m3 0.096 3.011,2-Dichlorobenzene 1 05/24/23 20:33 V33674ENM <0.174 µg/m3 0.174 12.01,3-Dichlorobenzene 1 05/24/23 20:33 V33674ENM <0.186 µg/m3 0.186 3.011,4-Dichlorobenzene 1 05/24/23 20:33 V33674ENM 2.53 µg/m3 0.134 2.47Dichlorodifluoromethane 1 05/24/23 20:33 V33674ENM <0.101 µg/m3 0.101 2.021,1-Dichloroethane 1 05/24/23 20:33 V33674ENM <0.129 µg/m3 0.129 2.021,2-Dichloroethane 1 05/24/23 20:33 V33674ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 12 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-1 96674 Matrix: 5/17/2023 9:24 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 <0.107 µg/m3 0.107 1.981,1-Dichloroethene 1 05/24/23 20:33 V33674ENM <0.095 µg/m3 0.095 1.98cis-1,2-Dichloroethene 1 05/24/23 20:33 V33674ENM <0.108 µg/m3 0.108 1.98trans-1,2-Dichloroethene 1 05/24/23 20:33 V33674ENM <0.205 µg/m3 0.205 2.311,2-Dichloropropane 1 05/24/23 20:33 V33674ENM <0.622 µg/m3 0.622 3.501,2-Dichlorotetrafluoroethane 1 05/24/23 20:33 V33674ENM <0.178 µg/m3 0.178 2.27cis-1,3-Dichloropropene 1 05/24/23 20:33 V33674ENM <0.178 µg/m3 0.178 2.27trans-1,3-Dichloropropene 1 05/24/23 20:33 V33674ENM <0.435 µg/m3 0.435 1.801,4-Dioxane 1 05/24/23 20:33 V33674ENM 2.37 µg/m3 0.136 1.80Ethyl Acetate 1 05/24/23 20:33 V33674ENM <0.106 µg/m3 0.106 2.17Ethylbenzene 1 05/24/23 20:33 V33674ENM <0.128 µg/m3 0.128 2.464-Ethyltoluene 1 05/24/23 20:33 V33674ENM <0.561 µg/m3 0.561 3.831,1,2-Trichloro-1,2,2-trifluoroethane 1 05/24/23 20:33 V33674ENM 0.631 J µg/m3 0.143 2.05Heptane 1 05/24/23 20:33 V33674ENM <0.330 µg/m3 0.330 5.33Hexachlorobutadiene 1 05/24/23 20:33 V33674ENM 0.641 J µg/m3 0.047 1.76n-Hexane 1 05/24/23 20:33 V33674ENM <0.285 µg/m3 0.285 2.052-Hexanone 1 05/24/23 20:33 V33674ENM 1.60 J µg/m3 0.139 4.92Isopropyl Alcohol 1 05/24/23 20:33 V33674ENM 1.80 µg/m3 0.224 1.47Methyl Ethyl Ketone (MEK)1 05/24/23 20:33 V33674ENM <0.033 µg/m3 0.033 1.80Methyl tert-butyl ether (MTBE)1 05/24/23 20:33 V33674ENM <0.121 µg/m3 0.121 2.054-Methyl-2-Pentanone 1 05/24/23 20:33 V33674ENM <0.488 µg/m3 0.488 1.74Methylene Chloride 1 05/24/23 20:33 V33674ENM <0.183 µg/m3 0.183 2.62Naphthalene 1 05/24/23 20:33 V33674ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 13 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-1 96674 Matrix: 5/17/2023 9:24 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 <0.242 µg/m3 0.242 0.860Propene 1 05/24/23 20:33 V33674ENM 2.39 µg/m3 0.124 2.13Styrene 1 05/24/23 20:33 V33674ENM <0.104 µg/m3 0.104 3.431,1,2,2-Tetrachloroethane 1 05/24/23 20:33 V33674ENM <0.181 µg/m3 0.181 3.39Tetrachloroethene 1 05/24/23 20:33 V33674ENM 0.386 J µg/m3 0.107 1.47Tetrahydrofuran 1 05/24/23 20:33 V33674ENM 1.39 J µg/m3 0.090 1.88Toluene 1 05/24/23 20:33 V33674ENM <0.209 µg/m3 0.209 3.711,2,4-Trichlorobenzene 1 05/24/23 20:33 V33674ENM <0.144 µg/m3 0.144 2.731,1,1-Trichloroethane 1 05/24/23 20:33 V33674ENM <0.087 µg/m3 0.087 2.731,1,2-Trichloroethane 1 05/24/23 20:33 V33674ENM <0.199 µg/m3 0.199 2.15Trichloroethene 1 05/24/23 20:33 V33674ENM 1.70 J µg/m3 0.130 2.81Trichlorofluoromethane 1 05/24/23 20:33 V33674ENM 1.94 J µg/m3 0.110 2.461,2,4-Trimethylbenzene 1 05/24/23 20:33 V33674ENM 0.722 J µg/m3 0.236 2.461,3,5-Trimethylbenzene 1 05/24/23 20:33 V33674ENM <0.224 µg/m3 0.224 1.76Vinyl Acetate 1 05/24/23 20:33 V33674ENM <0.127 µg/m3 0.127 1.28Vinyl Chloride 1 05/24/23 20:33 V33674ENM <0.157 µg/m3 0.157 2.17o-Xylene 1 05/24/23 20:33 V33674ENM <0.217 µg/m3 0.217 5.65m,p-Xylene 1 05/24/23 20:33 V33674ENM <0.157 µg/m3 0.157 2.17Xylene (Total)1 05/24/23 20:33 V33674 Surrogate: 4-Bromofluorobenzene 93.6 Limits: 70-130%05/24/23 20:331 ENM V33674 Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 14 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-2 96675 Matrix: 5/17/2023 9:23 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 17.9 µg/m3 0.202 4.75Acetone 1 05/24/23 21:23 V33674ENM 0.408 J µg/m3 0.073 1.60Benzene 1 05/24/23 21:23 V33674ENM <0.147 µg/m3 0.147 10.4Benzyl Chloride 1 05/24/23 21:23 V33674ENM <0.150 µg/m3 0.150 3.35Bromodichloromethane 1 05/24/23 21:23 V33674ENM <0.153 µg/m3 0.153 5.17Bromoform 1 05/24/23 21:23 V33674ENM <0.115 µg/m3 0.115 1.94Bromomethane 1 05/24/23 21:23 V33674ENM <0.328 µg/m3 0.328 1.111,3-Butadiene 1 05/24/23 21:23 V33674ENM <0.060 µg/m3 0.060 6.23Carbon Disulfide 1 05/24/23 21:23 V33674ENM <0.155 µg/m3 0.155 3.15Carbon Tetrachloride 1 05/24/23 21:23 V33674ENM <0.107 µg/m3 0.107 2.30Chlorobenzene 1 05/24/23 21:23 V33674ENM <0.208 µg/m3 0.208 4.26Chlorodibromomethane 1 05/24/23 21:23 V33674ENM <0.164 µg/m3 0.164 1.32Chloroethane 1 05/24/23 21:23 V33674ENM 7.56 µg/m3 0.086 2.44Chloroform 1 05/24/23 21:23 V33674ENM 0.755 J µg/m3 0.067 1.03Chloromethane 1 05/24/23 21:23 V33674ENM <0.161 µg/m3 0.161 3.44Cyclohexane 1 05/24/23 21:23 V33674ENM <0.151 µg/m3 0.151 3.841,2-Dibromoethane 1 05/24/23 21:23 V33674ENM <0.096 µg/m3 0.096 3.011,2-Dichlorobenzene 1 05/24/23 21:23 V33674ENM <0.174 µg/m3 0.174 12.01,3-Dichlorobenzene 1 05/24/23 21:23 V33674ENM <0.186 µg/m3 0.186 3.011,4-Dichlorobenzene 1 05/24/23 21:23 V33674ENM 2.35 J µg/m3 0.134 2.47Dichlorodifluoromethane 1 05/24/23 21:23 V33674ENM <0.101 µg/m3 0.101 2.021,1-Dichloroethane 1 05/24/23 21:23 V33674ENM <0.129 µg/m3 0.129 2.021,2-Dichloroethane 1 05/24/23 21:23 V33674ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 15 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-2 96675 Matrix: 5/17/2023 9:23 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 <0.107 µg/m3 0.107 1.981,1-Dichloroethene 1 05/24/23 21:23 V33674ENM <0.095 µg/m3 0.095 1.98cis-1,2-Dichloroethene 1 05/24/23 21:23 V33674ENM <0.108 µg/m3 0.108 1.98trans-1,2-Dichloroethene 1 05/24/23 21:23 V33674ENM <0.205 µg/m3 0.205 2.311,2-Dichloropropane 1 05/24/23 21:23 V33674ENM <0.622 µg/m3 0.622 3.501,2-Dichlorotetrafluoroethane 1 05/24/23 21:23 V33674ENM <0.178 µg/m3 0.178 2.27cis-1,3-Dichloropropene 1 05/24/23 21:23 V33674ENM <0.178 µg/m3 0.178 2.27trans-1,3-Dichloropropene 1 05/24/23 21:23 V33674ENM <0.435 µg/m3 0.435 1.801,4-Dioxane 1 05/24/23 21:23 V33674ENM 2.57 µg/m3 0.136 1.80Ethyl Acetate 1 05/24/23 21:23 V33674ENM <0.106 µg/m3 0.106 2.17Ethylbenzene 1 05/24/23 21:23 V33674ENM <0.128 µg/m3 0.128 2.464-Ethyltoluene 1 05/24/23 21:23 V33674ENM <0.561 µg/m3 0.561 3.831,1,2-Trichloro-1,2,2-trifluoroethane 1 05/24/23 21:23 V33674ENM 0.639 J µg/m3 0.143 2.05Heptane 1 05/24/23 21:23 V33674ENM <0.330 µg/m3 0.330 5.33Hexachlorobutadiene 1 05/24/23 21:23 V33674ENM 0.613 J µg/m3 0.047 1.76n-Hexane 1 05/24/23 21:23 V33674ENM <0.285 µg/m3 0.285 2.052-Hexanone 1 05/24/23 21:23 V33674ENM 0.978 J µg/m3 0.139 4.92Isopropyl Alcohol 1 05/24/23 21:23 V33674ENM 2.06 µg/m3 0.224 1.47Methyl Ethyl Ketone (MEK)1 05/24/23 21:23 V33674ENM <0.033 µg/m3 0.033 1.80Methyl tert-butyl ether (MTBE)1 05/24/23 21:23 V33674ENM <0.121 µg/m3 0.121 2.054-Methyl-2-Pentanone 1 05/24/23 21:23 V33674ENM <0.488 µg/m3 0.488 1.74Methylene Chloride 1 05/24/23 21:23 V33674ENM <0.183 µg/m3 0.183 2.62Naphthalene 1 05/24/23 21:23 V33674ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 16 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-2 96675 Matrix: 5/17/2023 9:23 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 <0.242 µg/m3 0.242 0.860Propene 1 05/24/23 21:23 V33674ENM 1.35 J µg/m3 0.124 2.13Styrene 1 05/24/23 21:23 V33674ENM <0.104 µg/m3 0.104 3.431,1,2,2-Tetrachloroethane 1 05/24/23 21:23 V33674ENM <0.181 µg/m3 0.181 3.39Tetrachloroethene 1 05/24/23 21:23 V33674ENM 0.353 J µg/m3 0.107 1.47Tetrahydrofuran 1 05/24/23 21:23 V33674ENM 2.40 µg/m3 0.090 1.88Toluene 1 05/24/23 21:23 V33674ENM <0.209 µg/m3 0.209 3.711,2,4-Trichlorobenzene 1 05/24/23 21:23 V33674ENM <0.144 µg/m3 0.144 2.731,1,1-Trichloroethane 1 05/24/23 21:23 V33674ENM <0.087 µg/m3 0.087 2.731,1,2-Trichloroethane 1 05/24/23 21:23 V33674ENM <0.199 µg/m3 0.199 2.15Trichloroethene 1 05/24/23 21:23 V33674ENM 1.46 J µg/m3 0.130 2.81Trichlorofluoromethane 1 05/24/23 21:23 V33674ENM 0.560 J µg/m3 0.110 2.461,2,4-Trimethylbenzene 1 05/24/23 21:23 V33674ENM <0.236 µg/m3 0.236 2.461,3,5-Trimethylbenzene 1 05/24/23 21:23 V33674ENM <0.224 µg/m3 0.224 1.76Vinyl Acetate 1 05/24/23 21:23 V33674ENM <0.127 µg/m3 0.127 1.28Vinyl Chloride 1 05/24/23 21:23 V33674ENM <0.157 µg/m3 0.157 2.17o-Xylene 1 05/24/23 21:23 V33674ENM <0.217 µg/m3 0.217 5.65m,p-Xylene 1 05/24/23 21:23 V33674ENM <0.157 µg/m3 0.157 2.17Xylene (Total)1 05/24/23 21:23 V33674 Surrogate: 4-Bromofluorobenzene 90.8 Limits: 70-130%05/24/23 21:231 ENM V33674 Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 17 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-3 96676 Matrix: 5/17/2023 9:22 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 16.7 µg/m3 0.202 4.75Acetone 1 05/24/23 22:13 V33674ENM 0.389 J µg/m3 0.073 1.60Benzene 1 05/24/23 22:13 V33674ENM <0.147 µg/m3 0.147 10.4Benzyl Chloride 1 05/24/23 22:13 V33674ENM <0.150 µg/m3 0.150 3.35Bromodichloromethane 1 05/24/23 22:13 V33674ENM <0.153 µg/m3 0.153 5.17Bromoform 1 05/24/23 22:13 V33674ENM <0.115 µg/m3 0.115 1.94Bromomethane 1 05/24/23 22:13 V33674ENM <0.328 µg/m3 0.328 1.111,3-Butadiene 1 05/24/23 22:13 V33674ENM <0.060 µg/m3 0.060 6.23Carbon Disulfide 1 05/24/23 22:13 V33674ENM <0.155 µg/m3 0.155 3.15Carbon Tetrachloride 1 05/24/23 22:13 V33674ENM <0.107 µg/m3 0.107 2.30Chlorobenzene 1 05/24/23 22:13 V33674ENM <0.208 µg/m3 0.208 4.26Chlorodibromomethane 1 05/24/23 22:13 V33674ENM <0.164 µg/m3 0.164 1.32Chloroethane 1 05/24/23 22:13 V33674ENM 1.34 J µg/m3 0.086 2.44Chloroform 1 05/24/23 22:13 V33674ENM 0.689 J µg/m3 0.067 1.03Chloromethane 1 05/24/23 22:13 V33674ENM <0.161 µg/m3 0.161 3.44Cyclohexane 1 05/24/23 22:13 V33674ENM <0.151 µg/m3 0.151 3.841,2-Dibromoethane 1 05/24/23 22:13 V33674ENM <0.096 µg/m3 0.096 3.011,2-Dichlorobenzene 1 05/24/23 22:13 V33674ENM <0.174 µg/m3 0.174 12.01,3-Dichlorobenzene 1 05/24/23 22:13 V33674ENM <0.186 µg/m3 0.186 3.011,4-Dichlorobenzene 1 05/24/23 22:13 V33674ENM 2.31 J µg/m3 0.134 2.47Dichlorodifluoromethane 1 05/24/23 22:13 V33674ENM <0.101 µg/m3 0.101 2.021,1-Dichloroethane 1 05/24/23 22:13 V33674ENM <0.129 µg/m3 0.129 2.021,2-Dichloroethane 1 05/24/23 22:13 V33674ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 18 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-3 96676 Matrix: 5/17/2023 9:22 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 <0.107 µg/m3 0.107 1.981,1-Dichloroethene 1 05/24/23 22:13 V33674ENM <0.095 µg/m3 0.095 1.98cis-1,2-Dichloroethene 1 05/24/23 22:13 V33674ENM <0.108 µg/m3 0.108 1.98trans-1,2-Dichloroethene 1 05/24/23 22:13 V33674ENM <0.205 µg/m3 0.205 2.311,2-Dichloropropane 1 05/24/23 22:13 V33674ENM <0.622 µg/m3 0.622 3.501,2-Dichlorotetrafluoroethane 1 05/24/23 22:13 V33674ENM <0.178 µg/m3 0.178 2.27cis-1,3-Dichloropropene 1 05/24/23 22:13 V33674ENM <0.178 µg/m3 0.178 2.27trans-1,3-Dichloropropene 1 05/24/23 22:13 V33674ENM <0.435 µg/m3 0.435 1.801,4-Dioxane 1 05/24/23 22:13 V33674ENM 0.724 J µg/m3 0.136 1.80Ethyl Acetate 1 05/24/23 22:13 V33674ENM <0.106 µg/m3 0.106 2.17Ethylbenzene 1 05/24/23 22:13 V33674ENM 0.408 J µg/m3 0.128 2.464-Ethyltoluene 1 05/24/23 22:13 V33674ENM <0.561 µg/m3 0.561 3.831,1,2-Trichloro-1,2,2-trifluoroethane 1 05/24/23 22:13 V33674ENM 0.418 J µg/m3 0.143 2.05Heptane 1 05/24/23 22:13 V33674ENM <0.330 µg/m3 0.330 5.33Hexachlorobutadiene 1 05/24/23 22:13 V33674ENM 0.563 J µg/m3 0.047 1.76n-Hexane 1 05/24/23 22:13 V33674ENM <0.285 µg/m3 0.285 2.052-Hexanone 1 05/24/23 22:13 V33674ENM 0.235 J µg/m3 0.139 4.92Isopropyl Alcohol 1 05/24/23 22:13 V33674ENM 1.42 J µg/m3 0.224 1.47Methyl Ethyl Ketone (MEK)1 05/24/23 22:13 V33674ENM <0.033 µg/m3 0.033 1.80Methyl tert-butyl ether (MTBE)1 05/24/23 22:13 V33674ENM <0.121 µg/m3 0.121 2.054-Methyl-2-Pentanone 1 05/24/23 22:13 V33674ENM <0.488 µg/m3 0.488 1.74Methylene Chloride 1 05/24/23 22:13 V33674ENM <0.183 µg/m3 0.183 2.62Naphthalene 1 05/24/23 22:13 V33674ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 19 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:IAS-3 96676 Matrix: 5/17/2023 9:22 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 <0.242 µg/m3 0.242 0.860Propene 1 05/24/23 22:13 V33674ENM 1.38 J µg/m3 0.124 2.13Styrene 1 05/24/23 22:13 V33674ENM <0.104 µg/m3 0.104 3.431,1,2,2-Tetrachloroethane 1 05/24/23 22:13 V33674ENM <0.181 µg/m3 0.181 3.39Tetrachloroethene 1 05/24/23 22:13 V33674ENM <0.107 µg/m3 0.107 1.47Tetrahydrofuran 1 05/24/23 22:13 V33674ENM 1.23 J µg/m3 0.090 1.88Toluene 1 05/24/23 22:13 V33674ENM <0.209 µg/m3 0.209 3.711,2,4-Trichlorobenzene 1 05/24/23 22:13 V33674ENM <0.144 µg/m3 0.144 2.731,1,1-Trichloroethane 1 05/24/23 22:13 V33674ENM <0.087 µg/m3 0.087 2.731,1,2-Trichloroethane 1 05/24/23 22:13 V33674ENM <0.199 µg/m3 0.199 2.15Trichloroethene 1 05/24/23 22:13 V33674ENM 1.39 J µg/m3 0.130 2.81Trichlorofluoromethane 1 05/24/23 22:13 V33674ENM 2.35 J µg/m3 0.110 2.461,2,4-Trimethylbenzene 1 05/24/23 22:13 V33674ENM 0.806 J µg/m3 0.236 2.461,3,5-Trimethylbenzene 1 05/24/23 22:13 V33674ENM <0.224 µg/m3 0.224 1.76Vinyl Acetate 1 05/24/23 22:13 V33674ENM <0.127 µg/m3 0.127 1.28Vinyl Chloride 1 05/24/23 22:13 V33674ENM <0.157 µg/m3 0.157 2.17o-Xylene 1 05/24/23 22:13 V33674ENM <0.217 µg/m3 0.217 5.65m,p-Xylene 1 05/24/23 22:13 V33674ENM <0.157 µg/m3 0.157 2.17Xylene (Total)1 05/24/23 22:13 V33674 Surrogate: 4-Bromofluorobenzene 92.7 Limits: 70-130%05/24/23 22:131 ENM V33674 Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 20 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:BKG-051726 96677 Matrix: 5/17/2023 9:21 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 20.1 µg/m3 0.202 4.75Acetone 1 05/24/23 23:06 V33674ENM 0.421 J µg/m3 0.073 1.60Benzene 1 05/24/23 23:06 V33674ENM <0.147 µg/m3 0.147 10.4Benzyl Chloride 1 05/24/23 23:06 V33674ENM <0.150 µg/m3 0.150 3.35Bromodichloromethane 1 05/24/23 23:06 V33674ENM <0.153 µg/m3 0.153 5.17Bromoform 1 05/24/23 23:06 V33674ENM <0.115 µg/m3 0.115 1.94Bromomethane 1 05/24/23 23:06 V33674ENM <0.328 µg/m3 0.328 1.111,3-Butadiene 1 05/24/23 23:06 V33674ENM <0.060 µg/m3 0.060 6.23Carbon Disulfide 1 05/24/23 23:06 V33674ENM <0.155 µg/m3 0.155 3.15Carbon Tetrachloride 1 05/24/23 23:06 V33674ENM <0.107 µg/m3 0.107 2.30Chlorobenzene 1 05/24/23 23:06 V33674ENM <0.208 µg/m3 0.208 4.26Chlorodibromomethane 1 05/24/23 23:06 V33674ENM <0.164 µg/m3 0.164 1.32Chloroethane 1 05/24/23 23:06 V33674ENM <0.086 µg/m3 0.086 2.44Chloroform 1 05/24/23 23:06 V33674ENM 0.747 J µg/m3 0.067 1.03Chloromethane 1 05/24/23 23:06 V33674ENM <0.161 µg/m3 0.161 3.44Cyclohexane 1 05/24/23 23:06 V33674ENM <0.151 µg/m3 0.151 3.841,2-Dibromoethane 1 05/24/23 23:06 V33674ENM <0.096 µg/m3 0.096 3.011,2-Dichlorobenzene 1 05/24/23 23:06 V33674ENM <0.174 µg/m3 0.174 12.01,3-Dichlorobenzene 1 05/24/23 23:06 V33674ENM <0.186 µg/m3 0.186 3.011,4-Dichlorobenzene 1 05/24/23 23:06 V33674ENM 2.37 J µg/m3 0.134 2.47Dichlorodifluoromethane 1 05/24/23 23:06 V33674ENM <0.101 µg/m3 0.101 2.021,1-Dichloroethane 1 05/24/23 23:06 V33674ENM <0.129 µg/m3 0.129 2.021,2-Dichloroethane 1 05/24/23 23:06 V33674ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 21 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:BKG-051726 96677 Matrix: 5/17/2023 9:21 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 <0.107 µg/m3 0.107 1.981,1-Dichloroethene 1 05/24/23 23:06 V33674ENM <0.095 µg/m3 0.095 1.98cis-1,2-Dichloroethene 1 05/24/23 23:06 V33674ENM <0.108 µg/m3 0.108 1.98trans-1,2-Dichloroethene 1 05/24/23 23:06 V33674ENM <0.205 µg/m3 0.205 2.311,2-Dichloropropane 1 05/24/23 23:06 V33674ENM <0.622 µg/m3 0.622 3.501,2-Dichlorotetrafluoroethane 1 05/24/23 23:06 V33674ENM <0.178 µg/m3 0.178 2.27cis-1,3-Dichloropropene 1 05/24/23 23:06 V33674ENM <0.178 µg/m3 0.178 2.27trans-1,3-Dichloropropene 1 05/24/23 23:06 V33674ENM <0.435 µg/m3 0.435 1.801,4-Dioxane 1 05/24/23 23:06 V33674ENM <0.136 µg/m3 0.136 1.80Ethyl Acetate 1 05/24/23 23:06 V33674ENM <0.106 µg/m3 0.106 2.17Ethylbenzene 1 05/24/23 23:06 V33674ENM <0.128 µg/m3 0.128 2.464-Ethyltoluene 1 05/24/23 23:06 V33674ENM <0.561 µg/m3 0.561 3.831,1,2-Trichloro-1,2,2-trifluoroethane 1 05/24/23 23:06 V33674ENM 0.549 J µg/m3 0.143 2.05Heptane 1 05/24/23 23:06 V33674ENM <0.330 µg/m3 0.330 5.33Hexachlorobutadiene 1 05/24/23 23:06 V33674ENM 0.807 J µg/m3 0.047 1.76n-Hexane 1 05/24/23 23:06 V33674ENM <0.285 µg/m3 0.285 2.052-Hexanone 1 05/24/23 23:06 V33674ENM <0.139 µg/m3 0.139 4.92Isopropyl Alcohol 1 05/24/23 23:06 V33674ENM 1.05 J µg/m3 0.224 1.47Methyl Ethyl Ketone (MEK)1 05/24/23 23:06 V33674ENM <0.033 µg/m3 0.033 1.80Methyl tert-butyl ether (MTBE)1 05/24/23 23:06 V33674ENM <0.121 µg/m3 0.121 2.054-Methyl-2-Pentanone 1 05/24/23 23:06 V33674ENM <0.488 µg/m3 0.488 1.74Methylene Chloride 1 05/24/23 23:06 V33674ENM 3.89 µg/m3 0.183 2.62Naphthalene 1 05/24/23 23:06 V33674ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 22 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:BKG-051726 96677 Matrix: 5/17/2023 9:21 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33657 05/24/23 09:00 <0.242 µg/m3 0.242 0.860Propene 1 05/24/23 23:06 V33674ENM <0.124 µg/m3 0.124 2.13Styrene 1 05/24/23 23:06 V33674ENM <0.104 µg/m3 0.104 3.431,1,2,2-Tetrachloroethane 1 05/24/23 23:06 V33674ENM <0.181 µg/m3 0.181 3.39Tetrachloroethene 1 05/24/23 23:06 V33674ENM <0.107 µg/m3 0.107 1.47Tetrahydrofuran 1 05/24/23 23:06 V33674ENM 1.67 J µg/m3 0.090 1.88Toluene 1 05/24/23 23:06 V33674ENM <0.209 µg/m3 0.209 3.711,2,4-Trichlorobenzene 1 05/24/23 23:06 V33674ENM <0.144 µg/m3 0.144 2.731,1,1-Trichloroethane 1 05/24/23 23:06 V33674ENM <0.087 µg/m3 0.087 2.731,1,2-Trichloroethane 1 05/24/23 23:06 V33674ENM <0.199 µg/m3 0.199 2.15Trichloroethene 1 05/24/23 23:06 V33674ENM 1.53 J µg/m3 0.130 2.81Trichlorofluoromethane 1 05/24/23 23:06 V33674ENM <0.110 µg/m3 0.110 2.461,2,4-Trimethylbenzene 1 05/24/23 23:06 V33674ENM <0.236 µg/m3 0.236 2.461,3,5-Trimethylbenzene 1 05/24/23 23:06 V33674ENM <0.224 µg/m3 0.224 1.76Vinyl Acetate 1 05/24/23 23:06 V33674ENM <0.127 µg/m3 0.127 1.28Vinyl Chloride 1 05/24/23 23:06 V33674ENM <0.157 µg/m3 0.157 2.17o-Xylene 1 05/24/23 23:06 V33674ENM <0.217 µg/m3 0.217 5.65m,p-Xylene 1 05/24/23 23:06 V33674ENM <0.157 µg/m3 0.157 2.17Xylene (Total)1 05/24/23 23:06 V33674 Surrogate: 4-Bromofluorobenzene 92.5 Limits: 70-130%05/24/23 23:061 ENM V33674 Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 23 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:P-1 96678 Matrix: 5/17/2023 9:25 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 V33784 05/26/23 09:00 138 µg/m3 1.01 23.8Acetone 5 05/26/23 18:46 V33785ENM 0.527 J µg/m3 0.073 1.60Benzene 1 05/26/23 00:03 V33777ENM <0.147 µg/m3 0.147 10.4Benzyl Chloride 1 05/26/23 00:03 V33777ENM <0.150 µg/m3 0.150 3.35Bromodichloromethane 1 05/26/23 00:03 V33777ENM <0.153 µg/m3 0.153 5.17Bromoform 1 05/26/23 00:03 V33777ENM <0.115 µg/m3 0.115 1.94Bromomethane 1 05/26/23 00:03 V33777ENM <0.328 µg/m3 0.328 1.111,3-Butadiene 1 05/26/23 00:03 V33777ENM 0.258 J µg/m3 0.060 6.23Carbon Disulfide 1 05/26/23 00:03 V33777ENM <0.155 µg/m3 0.155 3.15Carbon Tetrachloride 1 05/26/23 00:03 V33777ENM <0.107 µg/m3 0.107 2.30Chlorobenzene 1 05/26/23 00:03 V33777ENM <0.208 µg/m3 0.208 4.26Chlorodibromomethane 1 05/26/23 00:03 V33777ENM <0.164 µg/m3 0.164 1.32Chloroethane 1 05/26/23 00:03 V33777ENM <0.086 µg/m3 0.086 2.44Chloroform 1 05/26/23 00:03 V33777ENM 0.706 J µg/m3 0.067 1.03Chloromethane 1 05/26/23 00:03 V33777ENM <0.161 µg/m3 0.161 3.44Cyclohexane 1 05/26/23 00:03 V33777ENM <0.151 µg/m3 0.151 3.841,2-Dibromoethane 1 05/26/23 00:03 V33777ENM <0.096 µg/m3 0.096 3.011,2-Dichlorobenzene 1 05/26/23 00:03 V33777ENM <0.174 µg/m3 0.174 12.01,3-Dichlorobenzene 1 05/26/23 00:03 V33777ENM <0.186 µg/m3 0.186 3.011,4-Dichlorobenzene 1 05/26/23 00:03 V33777ENM 2.32 J µg/m3 0.134 2.47Dichlorodifluoromethane 1 05/26/23 00:03 V33777ENM <0.101 µg/m3 0.101 2.021,1-Dichloroethane 1 05/26/23 00:03 V33777ENM <0.129 µg/m3 0.129 2.021,2-Dichloroethane 1 05/26/23 00:03 V33777ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 24 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:P-1 96678 Matrix: 5/17/2023 9:25 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 V33784 05/26/23 09:00 <0.107 µg/m3 0.107 1.981,1-Dichloroethene 1 05/26/23 00:03 V33777ENM <0.095 µg/m3 0.095 1.98cis-1,2-Dichloroethene 1 05/26/23 00:03 V33777ENM <0.108 µg/m3 0.108 1.98trans-1,2-Dichloroethene 1 05/26/23 00:03 V33777ENM <0.205 µg/m3 0.205 2.311,2-Dichloropropane 1 05/26/23 00:03 V33777ENM <0.622 µg/m3 0.622 3.501,2-Dichlorotetrafluoroethane 1 05/26/23 00:03 V33777ENM <0.178 µg/m3 0.178 2.27cis-1,3-Dichloropropene 1 05/26/23 00:03 V33777ENM <0.178 µg/m3 0.178 2.27trans-1,3-Dichloropropene 1 05/26/23 00:03 V33777ENM <0.435 µg/m3 0.435 1.801,4-Dioxane 1 05/26/23 00:03 V33777ENM <0.136 µg/m3 0.136 1.80Ethyl Acetate 1 05/26/23 00:03 V33777ENM <0.106 µg/m3 0.106 2.17Ethylbenzene 1 05/26/23 00:03 V33777ENM <0.128 µg/m3 0.128 2.464-Ethyltoluene 1 05/26/23 00:03 V33777ENM <0.561 µg/m3 0.561 3.831,1,2-Trichloro-1,2,2-trifluoroethane 1 05/26/23 00:03 V33777ENM 0.831 J µg/m3 0.143 2.05Heptane 1 05/26/23 00:03 V33777ENM <0.330 µg/m3 0.330 5.33Hexachlorobutadiene 1 05/26/23 00:03 V33777ENM 0.641 J µg/m3 0.047 1.76n-Hexane 1 05/26/23 00:03 V33777ENM 1.50 J µg/m3 0.285 2.052-Hexanone 1 05/26/23 00:03 V33777ENM 15.2 µg/m3 0.139 4.92Isopropyl Alcohol 1 05/26/23 00:03 V33777ENM 9.54 µg/m3 0.224 1.47Methyl Ethyl Ketone (MEK)1 05/26/23 00:03 V33777ENM <0.033 µg/m3 0.033 1.80Methyl tert-butyl ether (MTBE)1 05/26/23 00:03 V33777ENM 0.421 J µg/m3 0.121 2.054-Methyl-2-Pentanone 1 05/26/23 00:03 V33777ENM <0.488 µg/m3 0.488 1.74Methylene Chloride 1 05/26/23 00:03 V33777ENM <0.183 µg/m3 0.183 2.62Naphthalene 1 05/26/23 00:03 V33777ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 25 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:P-1 96678 Matrix: 5/17/2023 9:25 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 V33784 05/26/23 09:00 0.786 J µg/m3 0.242 0.860Propene 1 05/26/23 00:03 V33777ENM 0.711 J µg/m3 0.124 2.13Styrene 1 05/26/23 00:03 V33777ENM <0.104 µg/m3 0.104 3.431,1,2,2-Tetrachloroethane 1 05/26/23 00:03 V33777ENM 0.746 J µg/m3 0.181 3.39Tetrachloroethene 1 05/26/23 00:03 V33777ENM 1.72 µg/m3 0.107 1.47Tetrahydrofuran 1 05/26/23 00:03 V33777ENM 6.90 µg/m3 0.090 1.88Toluene 1 05/26/23 00:03 V33777ENM <0.209 µg/m3 0.209 3.711,2,4-Trichlorobenzene 1 05/26/23 00:03 V33777ENM <0.144 µg/m3 0.144 2.731,1,1-Trichloroethane 1 05/26/23 00:03 V33777ENM <0.087 µg/m3 0.087 2.731,1,2-Trichloroethane 1 05/26/23 00:03 V33777ENM <0.199 µg/m3 0.199 2.15Trichloroethene 1 05/26/23 00:03 V33777ENM 1.37 J µg/m3 0.130 2.81Trichlorofluoromethane 1 05/26/23 00:03 V33777ENM 0.491 J µg/m3 0.110 2.461,2,4-Trimethylbenzene 1 05/26/23 00:03 V33777ENM <0.236 µg/m3 0.236 2.461,3,5-Trimethylbenzene 1 05/26/23 00:03 V33777ENM <0.224 µg/m3 0.224 1.76Vinyl Acetate 1 05/26/23 00:03 V33777ENM <0.127 µg/m3 0.127 1.28Vinyl Chloride 1 05/26/23 00:03 V33777ENM 0.494 J µg/m3 0.157 2.17o-Xylene 1 05/26/23 00:03 V33777ENM <0.217 µg/m3 0.217 5.65m,p-Xylene 1 05/26/23 00:03 V33777ENM 0.494 J µg/m3 0.157 2.17Xylene (Total)1 05/26/23 00:03 V33777 Surrogate: 4-Bromofluorobenzene 93.6 Limits: 70-130%05/26/23 00:031 ENM V33777 Surrogate: 4-Bromofluorobenzene 89.4 Limits: 70-130%05/26/23 18:465 ENM V33785 Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 26 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:P-1 96679 Matrix: 5/18/2023 12:49 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 6.71 µg/m3 0.202 4.75Acetone 1 05/25/23 17:42 V33777ENM 0.338 J µg/m3 0.073 1.60Benzene 1 05/25/23 17:42 V33777ENM <0.147 µg/m3 0.147 10.4Benzyl Chloride 1 05/25/23 17:42 V33777ENM <0.150 µg/m3 0.150 3.35Bromodichloromethane 1 05/25/23 17:42 V33777ENM <0.153 µg/m3 0.153 5.17Bromoform 1 05/25/23 17:42 V33777ENM <0.115 µg/m3 0.115 1.94Bromomethane 1 05/25/23 17:42 V33777ENM <0.328 µg/m3 0.328 1.111,3-Butadiene 1 05/25/23 17:42 V33777ENM 1.75 J µg/m3 0.060 6.23Carbon Disulfide 1 05/25/23 17:42 V33777ENM <0.155 µg/m3 0.155 3.15Carbon Tetrachloride 1 05/25/23 17:42 V33777ENM <0.107 µg/m3 0.107 2.30Chlorobenzene 1 05/25/23 17:42 V33777ENM <0.208 µg/m3 0.208 4.26Chlorodibromomethane 1 05/25/23 17:42 V33777ENM <0.164 µg/m3 0.164 1.32Chloroethane 1 05/25/23 17:42 V33777ENM 3.51 µg/m3 0.086 2.44Chloroform 1 05/25/23 17:42 V33777ENM <0.067 µg/m3 0.067 1.03Chloromethane 1 05/25/23 17:42 V33777ENM <0.161 µg/m3 0.161 3.44Cyclohexane 1 05/25/23 17:42 V33777ENM <0.151 µg/m3 0.151 3.841,2-Dibromoethane 1 05/25/23 17:42 V33777ENM <0.096 µg/m3 0.096 3.011,2-Dichlorobenzene 1 05/25/23 17:42 V33777ENM <0.174 µg/m3 0.174 12.01,3-Dichlorobenzene 1 05/25/23 17:42 V33777ENM <0.186 µg/m3 0.186 3.011,4-Dichlorobenzene 1 05/25/23 17:42 V33777ENM 12.5 µg/m3 0.134 2.47Dichlorodifluoromethane 1 05/25/23 17:42 V33777ENM <0.101 µg/m3 0.101 2.021,1-Dichloroethane 1 05/25/23 17:42 V33777ENM <0.129 µg/m3 0.129 2.021,2-Dichloroethane 1 05/25/23 17:42 V33777ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 27 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:P-1 96679 Matrix: 5/18/2023 12:49 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 <0.107 µg/m3 0.107 1.981,1-Dichloroethene 1 05/25/23 17:42 V33777ENM <0.095 µg/m3 0.095 1.98cis-1,2-Dichloroethene 1 05/25/23 17:42 V33777ENM <0.108 µg/m3 0.108 1.98trans-1,2-Dichloroethene 1 05/25/23 17:42 V33777ENM <0.205 µg/m3 0.205 2.311,2-Dichloropropane 1 05/25/23 17:42 V33777ENM <0.622 µg/m3 0.622 3.501,2-Dichlorotetrafluoroethane 1 05/25/23 17:42 V33777ENM <0.178 µg/m3 0.178 2.27cis-1,3-Dichloropropene 1 05/25/23 17:42 V33777ENM <0.178 µg/m3 0.178 2.27trans-1,3-Dichloropropene 1 05/25/23 17:42 V33777ENM <0.435 µg/m3 0.435 1.801,4-Dioxane 1 05/25/23 17:42 V33777ENM <0.136 µg/m3 0.136 1.80Ethyl Acetate 1 05/25/23 17:42 V33777ENM <0.106 µg/m3 0.106 2.17Ethylbenzene 1 05/25/23 17:42 V33777ENM <0.128 µg/m3 0.128 2.464-Ethyltoluene 1 05/25/23 17:42 V33777ENM <0.561 µg/m3 0.561 3.831,1,2-Trichloro-1,2,2-trifluoroethane 1 05/25/23 17:42 V33777ENM <0.143 µg/m3 0.143 2.05Heptane 1 05/25/23 17:42 V33777ENM <0.330 µg/m3 0.330 5.33Hexachlorobutadiene 1 05/25/23 17:42 V33777ENM 0.327 J µg/m3 0.047 1.76n-Hexane 1 05/25/23 17:42 V33777ENM <0.285 µg/m3 0.285 2.052-Hexanone 1 05/25/23 17:42 V33777ENM 1.21 J µg/m3 0.139 4.92Isopropyl Alcohol 1 05/25/23 17:42 V33777ENM 0.751 J µg/m3 0.224 1.47Methyl Ethyl Ketone (MEK)1 05/25/23 17:42 V33777ENM <0.033 µg/m3 0.033 1.80Methyl tert-butyl ether (MTBE)1 05/25/23 17:42 V33777ENM <0.121 µg/m3 0.121 2.054-Methyl-2-Pentanone 1 05/25/23 17:42 V33777ENM 2.07 µg/m3 0.488 1.74Methylene Chloride 1 05/25/23 17:42 V33777ENM 1.46 J µg/m3 0.183 2.62Naphthalene 1 05/25/23 17:42 V33777ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 28 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:P-1 96679 Matrix: 5/18/2023 12:49 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 <0.242 µg/m3 0.242 0.860Propene 1 05/25/23 17:42 V33777ENM <0.124 µg/m3 0.124 2.13Styrene 1 05/25/23 17:42 V33777ENM <0.104 µg/m3 0.104 3.431,1,2,2-Tetrachloroethane 1 05/25/23 17:42 V33777ENM 63.8 µg/m3 0.181 3.39Tetrachloroethene 1 05/25/23 17:42 V33777ENM 0.327 J µg/m3 0.107 1.47Tetrahydrofuran 1 05/25/23 17:42 V33777ENM 1.13 J µg/m3 0.090 1.88Toluene 1 05/25/23 17:42 V33777ENM <0.209 µg/m3 0.209 3.711,2,4-Trichlorobenzene 1 05/25/23 17:42 V33777ENM 2.54 J µg/m3 0.144 2.731,1,1-Trichloroethane 1 05/25/23 17:42 V33777ENM <0.087 µg/m3 0.087 2.731,1,2-Trichloroethane 1 05/25/23 17:42 V33777ENM <0.199 µg/m3 0.199 2.15Trichloroethene 1 05/25/23 17:42 V33777ENM 3.57 µg/m3 0.130 2.81Trichlorofluoromethane 1 05/25/23 17:42 V33777ENM 1.06 J µg/m3 0.110 2.461,2,4-Trimethylbenzene 1 05/25/23 17:42 V33777ENM <0.236 µg/m3 0.236 2.461,3,5-Trimethylbenzene 1 05/25/23 17:42 V33777ENM <0.224 µg/m3 0.224 1.76Vinyl Acetate 1 05/25/23 17:42 V33777ENM <0.127 µg/m3 0.127 1.28Vinyl Chloride 1 05/25/23 17:42 V33777ENM <0.157 µg/m3 0.157 2.17o-Xylene 1 05/25/23 17:42 V33777ENM <0.217 µg/m3 0.217 5.65m,p-Xylene 1 05/25/23 17:42 V33777ENM <0.157 µg/m3 0.157 2.17Xylene (Total)1 05/25/23 17:42 V33777 Surrogate: 4-Bromofluorobenzene 95.8 Limits: 70-130%05/25/23 17:421 ENM V33777 Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 29 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:MP-9 96680 Matrix: 5/19/2023 11:15 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 9.99 µg/m3 0.202 4.75Acetone 1 05/25/23 18:37 V33777ENM 0.396 J µg/m3 0.073 1.60Benzene 1 05/25/23 18:37 V33777ENM <0.147 µg/m3 0.147 10.4Benzyl Chloride 1 05/25/23 18:37 V33777ENM <0.150 µg/m3 0.150 3.35Bromodichloromethane 1 05/25/23 18:37 V33777ENM <0.153 µg/m3 0.153 5.17Bromoform 1 05/25/23 18:37 V33777ENM <0.115 µg/m3 0.115 1.94Bromomethane 1 05/25/23 18:37 V33777ENM <0.328 µg/m3 0.328 1.111,3-Butadiene 1 05/25/23 18:37 V33777ENM 1.08 J µg/m3 0.060 6.23Carbon Disulfide 1 05/25/23 18:37 V33777ENM <0.155 µg/m3 0.155 3.15Carbon Tetrachloride 1 05/25/23 18:37 V33777ENM <0.107 µg/m3 0.107 2.30Chlorobenzene 1 05/25/23 18:37 V33777ENM <0.208 µg/m3 0.208 4.26Chlorodibromomethane 1 05/25/23 18:37 V33777ENM <0.164 µg/m3 0.164 1.32Chloroethane 1 05/25/23 18:37 V33777ENM 0.527 J µg/m3 0.086 2.44Chloroform 1 05/25/23 18:37 V33777ENM <0.067 µg/m3 0.067 1.03Chloromethane 1 05/25/23 18:37 V33777ENM <0.161 µg/m3 0.161 3.44Cyclohexane 1 05/25/23 18:37 V33777ENM <0.151 µg/m3 0.151 3.841,2-Dibromoethane 1 05/25/23 18:37 V33777ENM <0.096 µg/m3 0.096 3.011,2-Dichlorobenzene 1 05/25/23 18:37 V33777ENM <0.174 µg/m3 0.174 12.01,3-Dichlorobenzene 1 05/25/23 18:37 V33777ENM <0.186 µg/m3 0.186 3.011,4-Dichlorobenzene 1 05/25/23 18:37 V33777ENM 2.42 J µg/m3 0.134 2.47Dichlorodifluoromethane 1 05/25/23 18:37 V33777ENM <0.101 µg/m3 0.101 2.021,1-Dichloroethane 1 05/25/23 18:37 V33777ENM <0.129 µg/m3 0.129 2.021,2-Dichloroethane 1 05/25/23 18:37 V33777ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 30 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:MP-9 96680 Matrix: 5/19/2023 11:15 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 <0.107 µg/m3 0.107 1.981,1-Dichloroethene 1 05/25/23 18:37 V33777ENM <0.095 µg/m3 0.095 1.98cis-1,2-Dichloroethene 1 05/25/23 18:37 V33777ENM <0.108 µg/m3 0.108 1.98trans-1,2-Dichloroethene 1 05/25/23 18:37 V33777ENM <0.205 µg/m3 0.205 2.311,2-Dichloropropane 1 05/25/23 18:37 V33777ENM <0.622 µg/m3 0.622 3.501,2-Dichlorotetrafluoroethane 1 05/25/23 18:37 V33777ENM <0.178 µg/m3 0.178 2.27cis-1,3-Dichloropropene 1 05/25/23 18:37 V33777ENM <0.178 µg/m3 0.178 2.27trans-1,3-Dichloropropene 1 05/25/23 18:37 V33777ENM <0.435 µg/m3 0.435 1.801,4-Dioxane 1 05/25/23 18:37 V33777ENM <0.136 µg/m3 0.136 1.80Ethyl Acetate 1 05/25/23 18:37 V33777ENM 0.542 J µg/m3 0.106 2.17Ethylbenzene 1 05/25/23 18:37 V33777ENM 19.9 µg/m3 0.128 2.464-Ethyltoluene 1 05/25/23 18:37 V33777ENM <0.561 µg/m3 0.561 3.831,1,2-Trichloro-1,2,2-trifluoroethane 1 05/25/23 18:37 V33777ENM <0.143 µg/m3 0.143 2.05Heptane 1 05/25/23 18:37 V33777ENM <0.330 µg/m3 0.330 5.33Hexachlorobutadiene 1 05/25/23 18:37 V33777ENM 0.401 J µg/m3 0.047 1.76n-Hexane 1 05/25/23 18:37 V33777ENM <0.285 µg/m3 0.285 2.052-Hexanone 1 05/25/23 18:37 V33777ENM 0.228 J µg/m3 0.139 4.92Isopropyl Alcohol 1 05/25/23 18:37 V33777ENM 1.35 J µg/m3 0.224 1.47Methyl Ethyl Ketone (MEK)1 05/25/23 18:37 V33777ENM <0.033 µg/m3 0.033 1.80Methyl tert-butyl ether (MTBE)1 05/25/23 18:37 V33777ENM 2.01 J µg/m3 0.121 2.054-Methyl-2-Pentanone 1 05/25/23 18:37 V33777ENM 2.66 µg/m3 0.488 1.74Methylene Chloride 1 05/25/23 18:37 V33777ENM 0.477 J µg/m3 0.183 2.62Naphthalene 1 05/25/23 18:37 V33777ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 31 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:MP-9 96680 Matrix: 5/19/2023 11:15 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 <0.242 µg/m3 0.242 0.860Propene 1 05/25/23 18:37 V33777ENM 0.613 J µg/m3 0.124 2.13Styrene 1 05/25/23 18:37 V33777ENM <0.104 µg/m3 0.104 3.431,1,2,2-Tetrachloroethane 1 05/25/23 18:37 V33777ENM 11.7 µg/m3 0.181 3.39Tetrachloroethene 1 05/25/23 18:37 V33777ENM 1.57 µg/m3 0.107 1.47Tetrahydrofuran 1 05/25/23 18:37 V33777ENM 1.42 J µg/m3 0.090 1.88Toluene 1 05/25/23 18:37 V33777ENM <0.209 µg/m3 0.209 3.711,2,4-Trichlorobenzene 1 05/25/23 18:37 V33777ENM 1.34 J µg/m3 0.144 2.731,1,1-Trichloroethane 1 05/25/23 18:37 V33777ENM <0.087 µg/m3 0.087 2.731,1,2-Trichloroethane 1 05/25/23 18:37 V33777ENM 131 µg/m3 0.199 2.15Trichloroethene 1 05/25/23 18:37 V33777ENM 1.78 J µg/m3 0.130 2.81Trichlorofluoromethane 1 05/25/23 18:37 V33777ENM 168 µg/m3 0.110 2.461,2,4-Trimethylbenzene 1 05/25/23 18:37 V33777ENM 88.1 µg/m3 0.236 2.461,3,5-Trimethylbenzene 1 05/25/23 18:37 V33777ENM <0.224 µg/m3 0.224 1.76Vinyl Acetate 1 05/25/23 18:37 V33777ENM <0.127 µg/m3 0.127 1.28Vinyl Chloride 1 05/25/23 18:37 V33777ENM 2.87 µg/m3 0.157 2.17o-Xylene 1 05/25/23 18:37 V33777ENM 0.460 J µg/m3 0.217 5.65m,p-Xylene 1 05/25/23 18:37 V33777ENM 3.33 J µg/m3 0.157 2.17Xylene (Total)1 05/25/23 18:37 V33777 Surrogate: 4-Bromofluorobenzene 94.1 Limits: 70-130%05/25/23 18:371 ENM V33777 Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 32 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:MP-3 96681 Matrix: 5/19/2023 12:30 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 8.30 µg/m3 0.202 4.75Acetone 1 05/25/23 19:29 V33777ENM 0.472 J µg/m3 0.073 1.60Benzene 1 05/25/23 19:29 V33777ENM <0.147 µg/m3 0.147 10.4Benzyl Chloride 1 05/25/23 19:29 V33777ENM <0.150 µg/m3 0.150 3.35Bromodichloromethane 1 05/25/23 19:29 V33777ENM <0.153 µg/m3 0.153 5.17Bromoform 1 05/25/23 19:29 V33777ENM <0.115 µg/m3 0.115 1.94Bromomethane 1 05/25/23 19:29 V33777ENM <0.328 µg/m3 0.328 1.111,3-Butadiene 1 05/25/23 19:29 V33777ENM 0.491 J µg/m3 0.060 6.23Carbon Disulfide 1 05/25/23 19:29 V33777ENM <0.155 µg/m3 0.155 3.15Carbon Tetrachloride 1 05/25/23 19:29 V33777ENM <0.107 µg/m3 0.107 2.30Chlorobenzene 1 05/25/23 19:29 V33777ENM <0.208 µg/m3 0.208 4.26Chlorodibromomethane 1 05/25/23 19:29 V33777ENM <0.164 µg/m3 0.164 1.32Chloroethane 1 05/25/23 19:29 V33777ENM 5.22 µg/m3 0.086 2.44Chloroform 1 05/25/23 19:29 V33777ENM 0.685 J µg/m3 0.067 1.03Chloromethane 1 05/25/23 19:29 V33777ENM <0.161 µg/m3 0.161 3.44Cyclohexane 1 05/25/23 19:29 V33777ENM <0.151 µg/m3 0.151 3.841,2-Dibromoethane 1 05/25/23 19:29 V33777ENM <0.096 µg/m3 0.096 3.011,2-Dichlorobenzene 1 05/25/23 19:29 V33777ENM <0.174 µg/m3 0.174 12.01,3-Dichlorobenzene 1 05/25/23 19:29 V33777ENM <0.186 µg/m3 0.186 3.011,4-Dichlorobenzene 1 05/25/23 19:29 V33777ENM 2.27 J µg/m3 0.134 2.47Dichlorodifluoromethane 1 05/25/23 19:29 V33777ENM <0.101 µg/m3 0.101 2.021,1-Dichloroethane 1 05/25/23 19:29 V33777ENM <0.129 µg/m3 0.129 2.021,2-Dichloroethane 1 05/25/23 19:29 V33777ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 33 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:MP-3 96681 Matrix: 5/19/2023 12:30 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 <0.107 µg/m3 0.107 1.981,1-Dichloroethene 1 05/25/23 19:29 V33777ENM <0.095 µg/m3 0.095 1.98cis-1,2-Dichloroethene 1 05/25/23 19:29 V33777ENM <0.108 µg/m3 0.108 1.98trans-1,2-Dichloroethene 1 05/25/23 19:29 V33777ENM <0.205 µg/m3 0.205 2.311,2-Dichloropropane 1 05/25/23 19:29 V33777ENM <0.622 µg/m3 0.622 3.501,2-Dichlorotetrafluoroethane 1 05/25/23 19:29 V33777ENM <0.178 µg/m3 0.178 2.27cis-1,3-Dichloropropene 1 05/25/23 19:29 V33777ENM <0.178 µg/m3 0.178 2.27trans-1,3-Dichloropropene 1 05/25/23 19:29 V33777ENM <0.435 µg/m3 0.435 1.801,4-Dioxane 1 05/25/23 19:29 V33777ENM <0.136 µg/m3 0.136 1.80Ethyl Acetate 1 05/25/23 19:29 V33777ENM 0.586 J µg/m3 0.106 2.17Ethylbenzene 1 05/25/23 19:29 V33777ENM 0.673 J µg/m3 0.128 2.464-Ethyltoluene 1 05/25/23 19:29 V33777ENM <0.561 µg/m3 0.561 3.831,1,2-Trichloro-1,2,2-trifluoroethane 1 05/25/23 19:29 V33777ENM 0.315 J µg/m3 0.143 2.05Heptane 1 05/25/23 19:29 V33777ENM <0.330 µg/m3 0.330 5.33Hexachlorobutadiene 1 05/25/23 19:29 V33777ENM 0.613 J µg/m3 0.047 1.76n-Hexane 1 05/25/23 19:29 V33777ENM <0.285 µg/m3 0.285 2.052-Hexanone 1 05/25/23 19:29 V33777ENM 2.49 J µg/m3 0.139 4.92Isopropyl Alcohol 1 05/25/23 19:29 V33777ENM 1.11 J µg/m3 0.224 1.47Methyl Ethyl Ketone (MEK)1 05/25/23 19:29 V33777ENM <0.033 µg/m3 0.033 1.80Methyl tert-butyl ether (MTBE)1 05/25/23 19:29 V33777ENM <0.121 µg/m3 0.121 2.054-Methyl-2-Pentanone 1 05/25/23 19:29 V33777ENM 2.10 µg/m3 0.488 1.74Methylene Chloride 1 05/25/23 19:29 V33777ENM <0.183 µg/m3 0.183 2.62Naphthalene 1 05/25/23 19:29 V33777ENM Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 34 of 50 , REPORT OF ANALYSISReport Number : Project Information : NC 28203 23-139-0102 01102 Hart & Hickman (Charlotte) 2923 South Tryon St. Ste 100 Dave Kahn Charlotte Received : 05/19/2023 PAM-003 Report Date : 05/30/2023 Sample ID : Lab No : Sampled:MP-3 96681 Matrix: 5/19/2023 12:30 Air Analytical Method: Prep Method: Test Results Units MDL MQL By Analytical Batch Date / Time Analyzed DF TO-15 Prep TO-15 Prep Batch(es):V33771 05/25/23 09:00 <0.242 µg/m3 0.242 0.860Propene 1 05/25/23 19:29 V33777ENM 5.18 µg/m3 0.124 2.13Styrene 1 05/25/23 19:29 V33777ENM <0.104 µg/m3 0.104 3.431,1,2,2-Tetrachloroethane 1 05/25/23 19:29 V33777ENM <0.181 µg/m3 0.181 3.39Tetrachloroethene 1 05/25/23 19:29 V33777ENM 1.86 µg/m3 0.107 1.47Tetrahydrofuran 1 05/25/23 19:29 V33777ENM 2.13 µg/m3 0.090 1.88Toluene 1 05/25/23 19:29 V33777ENM <0.209 µg/m3 0.209 3.711,2,4-Trichlorobenzene 1 05/25/23 19:29 V33777ENM <0.144 µg/m3 0.144 2.731,1,1-Trichloroethane 1 05/25/23 19:29 V33777ENM <0.087 µg/m3 0.087 2.731,1,2-Trichloroethane 1 05/25/23 19:29 V33777ENM 0.548 J µg/m3 0.199 2.15Trichloroethene 1 05/25/23 19:29 V33777ENM 1.42 J µg/m3 0.130 2.81Trichlorofluoromethane 1 05/25/23 19:29 V33777ENM 13.3 µg/m3 0.110 2.461,2,4-Trimethylbenzene 1 05/25/23 19:29 V33777ENM 4.51 µg/m3 0.236 2.461,3,5-Trimethylbenzene 1 05/25/23 19:29 V33777ENM 0.792 J µg/m3 0.224 1.76Vinyl Acetate 1 05/25/23 19:29 V33777ENM <0.127 µg/m3 0.127 1.28Vinyl Chloride 1 05/25/23 19:29 V33777ENM 0.907 J µg/m3 0.157 2.17o-Xylene 1 05/25/23 19:29 V33777ENM <0.217 µg/m3 0.217 5.65m,p-Xylene 1 05/25/23 19:29 V33777ENM 0.907 J µg/m3 0.157 2.17Xylene (Total)1 05/25/23 19:29 V33777 Surrogate: 4-Bromofluorobenzene 95.8 Limits: 70-130%05/25/23 19:291 ENM V33777 Qualifiers/ Definitions Dilution FactorDFAnalyte detected in blankB Method Quantitation LimitMQLEstimated valueJ Page 35 of 50 Quality Control Data 23-139-0102Report No: Project Description: Client ID:Hart & Hickman (Charlotte) PAM-003 QC Prep Batch Method: Volatile Organic Compounds in Air- GC/MS TO-15 V33674QC Analytical Batch(es): Analysis Method: Analysis Description: TO-15 Prep QC Prep:V33657 Associated Lab Samples: 96673, 96674, 96675, 96676, 96677 LRB-V33657 Matrix: AIRLab Reagent Blank Parameter AnalyzedMQLMDLBlank ResultUnits % Recovery % Rec Limits 05/24/23 11:334.750.202<0.202µg/m3Acetone 05/24/23 11:331.600.073<0.073µg/m3Benzene 05/24/23 11:3310.40.147<0.147µg/m3Benzyl Chloride 05/24/23 11:333.350.150<0.150µg/m3Bromodichloromethane 05/24/23 11:335.170.153<0.153µg/m3Bromoform 05/24/23 11:331.940.115<0.115µg/m3Bromomethane 05/24/23 11:331.110.328<0.328µg/m31,3-Butadiene 05/24/23 11:336.230.0600.523µg/m3Carbon Disulfide 05/24/23 11:333.150.155<0.155µg/m3Carbon Tetrachloride 05/24/23 11:332.300.107<0.107µg/m3Chlorobenzene 05/24/23 11:334.260.208<0.208µg/m3Chlorodibromomethane 05/24/23 11:331.320.164<0.164µg/m3Chloroethane 05/24/23 11:332.440.086<0.086µg/m3Chloroform 05/24/23 11:331.030.067<0.067µg/m3Chloromethane 05/24/23 11:333.440.161<0.161µg/m3Cyclohexane 05/24/23 11:333.840.151<0.151µg/m31,2-Dibromoethane 05/24/23 11:333.010.096<0.096µg/m31,2-Dichlorobenzene 05/24/23 11:3312.00.174<0.174µg/m31,3-Dichlorobenzene 05/24/23 11:333.010.186<0.186µg/m31,4-Dichlorobenzene 05/24/23 11:332.470.134<0.134µg/m3Dichlorodifluoromethane 05/24/23 11:332.020.101<0.101µg/m31,1-Dichloroethane 05/24/23 11:332.020.129<0.129µg/m31,2-Dichloroethane 05/24/23 11:331.980.107<0.107µg/m31,1-Dichloroethene 05/24/23 11:331.980.095<0.095µg/m3cis-1,2-Dichloroethene 05/24/23 11:331.980.108<0.108µg/m3trans-1,2-Dichloroethene 05/24/23 11:332.310.205<0.205µg/m31,2-Dichloropropane 05/24/23 11:333.500.622<0.622µg/m31,2-Dichlorotetrafluoroethane Page 1 of 11Date:05/30/2023 03:29 PM Page 36 of 50 Quality Control Data 23-139-0102Report No: Project Description: Client ID:Hart & Hickman (Charlotte) PAM-003 QC Prep Batch Method: Volatile Organic Compounds in Air- GC/MS TO-15 V33674QC Analytical Batch(es): Analysis Method: Analysis Description: TO-15 Prep QC Prep:V33657 Associated Lab Samples: 96673, 96674, 96675, 96676, 96677 LRB-V33657 Matrix: AIRLab Reagent Blank Parameter AnalyzedMQLMDLBlank ResultUnits % Recovery % Rec Limits 05/24/23 11:332.270.178<0.178µg/m3cis-1,3-Dichloropropene 05/24/23 11:332.270.178<0.178µg/m3trans-1,3-Dichloropropene 05/24/23 11:331.800.435<0.435µg/m31,4-Dioxane 05/24/23 11:331.800.136<0.136µg/m3Ethyl Acetate 05/24/23 11:332.170.106<0.106µg/m3Ethylbenzene 05/24/23 11:332.460.128<0.128µg/m34-Ethyltoluene 05/24/23 11:333.830.561<0.561µg/m31,1,2-Trichloro-1,2,2-trifluoroethane 05/24/23 11:332.050.143<0.143µg/m3Heptane 05/24/23 11:335.330.330<0.330µg/m3Hexachlorobutadiene 05/24/23 11:331.760.047<0.047µg/m3n-Hexane 05/24/23 11:332.050.285<0.285µg/m32-Hexanone 05/24/23 11:334.920.139<0.139µg/m3Isopropyl Alcohol 05/24/23 11:331.470.224<0.224µg/m3Methyl Ethyl Ketone (MEK) 05/24/23 11:331.800.033<0.033µg/m3Methyl tert-butyl ether (MTBE) 05/24/23 11:332.050.121<0.121µg/m34-Methyl-2-Pentanone 05/24/23 11:331.740.488<0.488µg/m3Methylene Chloride 05/24/23 11:332.620.183<0.183µg/m3Naphthalene 05/24/23 11:330.8600.242<0.242µg/m3Propene 05/24/23 11:332.130.124<0.124µg/m3Styrene 05/24/23 11:333.430.104<0.104µg/m31,1,2,2-Tetrachloroethane 05/24/23 11:333.390.181<0.181µg/m3Tetrachloroethene 05/24/23 11:331.470.107<0.107µg/m3Tetrahydrofuran 05/24/23 11:331.880.090<0.090µg/m3Toluene 05/24/23 11:333.710.209<0.209µg/m31,2,4-Trichlorobenzene 05/24/23 11:332.730.144<0.144µg/m31,1,1-Trichloroethane 05/24/23 11:332.730.087<0.087µg/m31,1,2-Trichloroethane 05/24/23 11:332.150.199<0.199µg/m3Trichloroethene Page 2 of 11Date:05/30/2023 03:29 PM Page 37 of 50 Quality Control Data 23-139-0102Report No: Project Description: Client ID:Hart & Hickman (Charlotte) PAM-003 QC Prep Batch Method: Volatile Organic Compounds in Air- GC/MS TO-15 V33674QC Analytical Batch(es): Analysis Method: Analysis Description: TO-15 Prep QC Prep:V33657 Associated Lab Samples: 96673, 96674, 96675, 96676, 96677 LRB-V33657 Matrix: AIRLab Reagent Blank Parameter AnalyzedMQLMDLBlank ResultUnits % Recovery % Rec Limits 05/24/23 11:332.810.130<0.130µg/m3Trichlorofluoromethane 05/24/23 11:332.460.110<0.110µg/m31,2,4-Trimethylbenzene 05/24/23 11:332.460.236<0.236µg/m31,3,5-Trimethylbenzene 05/24/23 11:331.760.224<0.224µg/m3Vinyl Acetate 05/24/23 11:331.280.127<0.127µg/m3Vinyl Chloride 05/24/23 11:332.170.157<0.157µg/m3o-Xylene 05/24/23 11:335.650.217<0.217µg/m3m,p-Xylene 05/24/23 11:334-Bromofluorobenzene (S)91.6 70-130 LCS-V33657Laboratory Control Sample Parameter LCS %RecLCS Result Spike Conc.Units % Rec Limits 11713.911.9µg/m3Acetone 70-130 10216.316.0µg/m3Benzene 70-130 11128.725.9µg/m3Benzyl Chloride 70-130 10133.833.5µg/m3Bromodichloromethane 70-130 10252.751.7µg/m3Bromoform 70-130 11422.119.4µg/m3Bromomethane 70-130 11112.311.1µg/m31,3-Butadiene 70-130 11417.815.6µg/m3Carbon Disulfide 70-130 99.631.431.5µg/m3Carbon Tetrachloride 70-130 10624.423.0µg/m3Chlorobenzene 70-130 10343.742.6µg/m3Chlorodibromomethane 70-130 11715.413.2µg/m3Chloroethane 70-130 10425.324.4µg/m3Chloroform 70-130 11712.010.3µg/m3Chloromethane 70-130 10618.317.2µg/m3Cyclohexane 70-130 Page 3 of 11Date:05/30/2023 03:29 PM Page 38 of 50 Quality Control Data 23-139-0102Report No: Project Description: Client ID:Hart & Hickman (Charlotte) PAM-003 QC Prep Batch Method: Volatile Organic Compounds in Air- GC/MS TO-15 V33674QC Analytical Batch(es): Analysis Method: Analysis Description: TO-15 Prep QC Prep:V33657 LCS-V33657Laboratory Control Sample Parameter LCS %RecLCS Result Spike Conc.Units % Rec Limits 10540.438.4µg/m31,2-Dibromoethane 70-130 11434.330.1µg/m31,2-Dichlorobenzene 70-130 11334.130.1µg/m31,3-Dichlorobenzene 70-130 11334.130.1µg/m31,4-Dichlorobenzene 70-130 11428.124.7µg/m3Dichlorodifluoromethane 70-130 11423.020.2µg/m31,1-Dichloroethane 70-130 10521.220.2µg/m31,2-Dichloroethane 70-130 11522.819.8µg/m31,1-Dichloroethene 70-130 11522.719.8µg/m3cis-1,2-Dichloroethene 70-130 11522.819.8µg/m3trans-1,2-Dichloroethene 70-130 10223.623.1µg/m31,2-Dichloropropane 70-130 11440.035.0µg/m31,2-Dichlorotetrafluoroethane 70-130 10022.822.7µg/m3cis-1,3-Dichloropropene 70-130 10022.822.7µg/m3trans-1,3-Dichloropropene 70-130 10118.118.0µg/m31,4-Dioxane 70-130 11420.618.0µg/m3Ethyl Acetate 70-130 10522.721.7µg/m3Ethylbenzene 70-130 10726.324.6µg/m34-Ethyltoluene 70-130 11443.738.3µg/m31,1,2-Trichloro-1,2,2-trifluoroethane 70-130 99.520.420.5µg/m3Heptane 70-130 10556.053.3µg/m3Hexachlorobutadiene 70-130 11319.917.6µg/m3n-Hexane 70-130 10521.520.5µg/m32-Hexanone 70-130 11414.012.3µg/m3Isopropyl Alcohol 70-130 11016.314.8µg/m3Methyl Ethyl Ketone (MEK)70-130 11120.018.0µg/m3Methyl tert-butyl ether (MTBE)70-130 10321.220.5µg/m34-Methyl-2-Pentanone 70-130 Page 4 of 11Date:05/30/2023 03:29 PM Page 39 of 50 Quality Control Data 23-139-0102Report No: Project Description: Client ID:Hart & Hickman (Charlotte) PAM-003 QC Prep Batch Method: Volatile Organic Compounds in Air- GC/MS TO-15 V33674QC Analytical Batch(es): Analysis Method: Analysis Description: TO-15 Prep QC Prep:V33657 LCS-V33657Laboratory Control Sample Parameter LCS %RecLCS Result Spike Conc.Units % Rec Limits 11920.717.4µg/m3Methylene Chloride 70-130 12432.526.2µg/m3Naphthalene 70-130 11710.18.61µg/m3Propene 70-130 10322.021.3µg/m3Styrene 70-130 10535.934.3µg/m31,1,2,2-Tetrachloroethane 70-130 10134.133.9µg/m3Tetrachloroethene 70-130 10415.314.7µg/m3Tetrahydrofuran 70-130 98.418.518.8µg/m3Toluene 70-130 12245.237.1µg/m31,2,4-Trichlorobenzene 70-130 10127.527.3µg/m31,1,1-Trichloroethane 70-130 10428.527.3µg/m31,1,2-Trichloroethane 70-130 10027.026.9µg/m3Trichloroethene 70-130 11431.928.1µg/m3Trichlorofluoromethane 70-130 11027.024.6µg/m31,2,4-Trimethylbenzene 70-130 10726.224.6µg/m31,3,5-Trimethylbenzene 70-130 11119.517.6µg/m3Vinyl Acetate 70-130 11314.412.8µg/m3Vinyl Chloride 70-130 10422.621.7µg/m3o-Xylene 70-130 99.543.243.4µg/m3m,p-Xylene 70-130 94.64-Bromofluorobenzene (S)70-130 Page 5 of 11Date:05/30/2023 03:29 PM Page 40 of 50 Quality Control Data 23-139-0102Report No: Project Description: Client ID:Hart & Hickman (Charlotte) PAM-003 QC Prep Batch Method: Volatile Organic Compounds in Air- GC/MS TO-15 V33777QC Analytical Batch(es): Analysis Method: Analysis Description: TO-15 Prep QC Prep:V33771 Associated Lab Samples: 96678, 96679, 96680, 96681 LRB-V33771 Matrix: AIRLab Reagent Blank Parameter AnalyzedMQLMDLBlank ResultUnits % Recovery % Rec Limits 05/25/23 12:394.750.202<0.202µg/m3Acetone 05/25/23 12:391.600.073<0.073µg/m3Benzene 05/25/23 12:3910.40.147<0.147µg/m3Benzyl Chloride 05/25/23 12:393.350.150<0.150µg/m3Bromodichloromethane 05/25/23 12:395.170.153<0.153µg/m3Bromoform 05/25/23 12:391.940.115<0.115µg/m3Bromomethane 05/25/23 12:391.110.328<0.328µg/m31,3-Butadiene 05/25/23 12:396.230.060<0.060µg/m3Carbon Disulfide 05/25/23 12:393.150.155<0.155µg/m3Carbon Tetrachloride 05/25/23 12:392.300.107<0.107µg/m3Chlorobenzene 05/25/23 12:394.260.208<0.208µg/m3Chlorodibromomethane 05/25/23 12:391.320.164<0.164µg/m3Chloroethane 05/25/23 12:392.440.086<0.086µg/m3Chloroform 05/25/23 12:391.030.067<0.067µg/m3Chloromethane 05/25/23 12:393.440.161<0.161µg/m3Cyclohexane 05/25/23 12:393.840.151<0.151µg/m31,2-Dibromoethane 05/25/23 12:393.010.096<0.096µg/m31,2-Dichlorobenzene 05/25/23 12:3912.00.174<0.174µg/m31,3-Dichlorobenzene 05/25/23 12:393.010.186<0.186µg/m31,4-Dichlorobenzene 05/25/23 12:392.470.134<0.134µg/m3Dichlorodifluoromethane 05/25/23 12:392.020.101<0.101µg/m31,1-Dichloroethane 05/25/23 12:392.020.129<0.129µg/m31,2-Dichloroethane 05/25/23 12:391.980.107<0.107µg/m31,1-Dichloroethene 05/25/23 12:391.980.095<0.095µg/m3cis-1,2-Dichloroethene 05/25/23 12:391.980.108<0.108µg/m3trans-1,2-Dichloroethene 05/25/23 12:392.310.205<0.205µg/m31,2-Dichloropropane 05/25/23 12:393.500.622<0.622µg/m31,2-Dichlorotetrafluoroethane Page 6 of 11Date:05/30/2023 03:29 PM Page 41 of 50 Quality Control Data 23-139-0102Report No: Project Description: Client ID:Hart & Hickman (Charlotte) PAM-003 QC Prep Batch Method: Volatile Organic Compounds in Air- GC/MS TO-15 V33777QC Analytical Batch(es): Analysis Method: Analysis Description: TO-15 Prep QC Prep:V33771 Associated Lab Samples: 96678, 96679, 96680, 96681 LRB-V33771 Matrix: AIRLab Reagent Blank Parameter AnalyzedMQLMDLBlank ResultUnits % Recovery % Rec Limits 05/25/23 12:392.270.178<0.178µg/m3cis-1,3-Dichloropropene 05/25/23 12:392.270.178<0.178µg/m3trans-1,3-Dichloropropene 05/25/23 12:391.800.435<0.435µg/m31,4-Dioxane 05/25/23 12:391.800.136<0.136µg/m3Ethyl Acetate 05/25/23 12:392.170.106<0.106µg/m3Ethylbenzene 05/25/23 12:392.460.128<0.128µg/m34-Ethyltoluene 05/25/23 12:393.830.561<0.561µg/m31,1,2-Trichloro-1,2,2-trifluoroethane 05/25/23 12:392.050.143<0.143µg/m3Heptane 05/25/23 12:395.330.330<0.330µg/m3Hexachlorobutadiene 05/25/23 12:391.760.047<0.047µg/m3n-Hexane 05/25/23 12:392.050.285<0.285µg/m32-Hexanone 05/25/23 12:394.920.139<0.139µg/m3Isopropyl Alcohol 05/25/23 12:391.470.224<0.224µg/m3Methyl Ethyl Ketone (MEK) 05/25/23 12:391.800.033<0.033µg/m3Methyl tert-butyl ether (MTBE) 05/25/23 12:392.050.121<0.121µg/m34-Methyl-2-Pentanone 05/25/23 12:391.740.488<0.488µg/m3Methylene Chloride 05/25/23 12:392.620.183<0.183µg/m3Naphthalene 05/25/23 12:390.8600.242<0.242µg/m3Propene 05/25/23 12:392.130.124<0.124µg/m3Styrene 05/25/23 12:393.430.104<0.104µg/m31,1,2,2-Tetrachloroethane 05/25/23 12:393.390.181<0.181µg/m3Tetrachloroethene 05/25/23 12:391.470.107<0.107µg/m3Tetrahydrofuran 05/25/23 12:391.880.090<0.090µg/m3Toluene 05/25/23 12:393.710.209<0.209µg/m31,2,4-Trichlorobenzene 05/25/23 12:392.730.144<0.144µg/m31,1,1-Trichloroethane 05/25/23 12:392.730.087<0.087µg/m31,1,2-Trichloroethane 05/25/23 12:392.150.199<0.199µg/m3Trichloroethene Page 7 of 11Date:05/30/2023 03:29 PM Page 42 of 50 Quality Control Data 23-139-0102Report No: Project Description: Client ID:Hart & Hickman (Charlotte) PAM-003 QC Prep Batch Method: Volatile Organic Compounds in Air- GC/MS TO-15 V33777QC Analytical Batch(es): Analysis Method: Analysis Description: TO-15 Prep QC Prep:V33771 Associated Lab Samples: 96678, 96679, 96680, 96681 LRB-V33771 Matrix: AIRLab Reagent Blank Parameter AnalyzedMQLMDLBlank ResultUnits % Recovery % Rec Limits 05/25/23 12:392.810.130<0.130µg/m3Trichlorofluoromethane 05/25/23 12:392.460.110<0.110µg/m31,2,4-Trimethylbenzene 05/25/23 12:392.460.236<0.236µg/m31,3,5-Trimethylbenzene 05/25/23 12:391.760.224<0.224µg/m3Vinyl Acetate 05/25/23 12:391.280.127<0.127µg/m3Vinyl Chloride 05/25/23 12:392.170.157<0.157µg/m3o-Xylene 05/25/23 12:395.650.217<0.217µg/m3m,p-Xylene 05/25/23 12:394-Bromofluorobenzene (S)91.3 70-130 LCS-V33771Laboratory Control Sample Parameter LCS %RecLCS Result Spike Conc.Units % Rec Limits 11413.611.9µg/m3Acetone 70-130 10416.616.0µg/m3Benzene 70-130 11429.625.9µg/m3Benzyl Chloride 70-130 98.232.933.5µg/m3Bromodichloromethane 70-130 94.148.751.7µg/m3Bromoform 70-130 11923.119.4µg/m3Bromomethane 70-130 11412.611.1µg/m31,3-Butadiene 70-130 11618.115.6µg/m3Carbon Disulfide 70-130 95.230.031.5µg/m3Carbon Tetrachloride 70-130 11326.123.0µg/m3Chlorobenzene 70-130 10143.242.6µg/m3Chlorodibromomethane 70-130 12316.213.2µg/m3Chloroethane 70-130 10625.824.4µg/m3Chloroform 70-130 11712.110.3µg/m3Chloromethane 70-130 10718.417.2µg/m3Cyclohexane 70-130 Page 8 of 11Date:05/30/2023 03:29 PM Page 43 of 50 Quality Control Data 23-139-0102Report No: Project Description: Client ID:Hart & Hickman (Charlotte) PAM-003 QC Prep Batch Method: Volatile Organic Compounds in Air- GC/MS TO-15 V33777QC Analytical Batch(es): Analysis Method: Analysis Description: TO-15 Prep QC Prep:V33771 LCS-V33771Laboratory Control Sample Parameter LCS %RecLCS Result Spike Conc.Units % Rec Limits 11243.038.4µg/m31,2-Dibromoethane 70-130 12136.330.1µg/m31,2-Dichlorobenzene 70-130 12136.330.1µg/m31,3-Dichlorobenzene 70-130 12136.430.1µg/m31,4-Dichlorobenzene 70-130 11528.424.7µg/m3Dichlorodifluoromethane 70-130 11723.620.2µg/m31,1-Dichloroethane 70-130 10421.120.2µg/m31,2-Dichloroethane 70-130 11623.019.8µg/m31,1-Dichloroethene 70-130 11522.719.8µg/m3cis-1,2-Dichloroethene 70-130 11723.119.8µg/m3trans-1,2-Dichloroethene 70-130 10424.123.1µg/m31,2-Dichloropropane 70-130 11841.335.0µg/m31,2-Dichlorotetrafluoroethane 70-130 10223.122.7µg/m3cis-1,3-Dichloropropene 70-130 10223.122.7µg/m3trans-1,3-Dichloropropene 70-130 10318.618.0µg/m31,4-Dioxane 70-130 11420.518.0µg/m3Ethyl Acetate 70-130 11023.921.7µg/m3Ethylbenzene 70-130 11327.924.6µg/m34-Ethyltoluene 70-130 11644.438.3µg/m31,1,2-Trichloro-1,2,2-trifluoroethane 70-130 97.520.020.5µg/m3Heptane 70-130 11360.153.3µg/m3Hexachlorobutadiene 70-130 11620.417.6µg/m3n-Hexane 70-130 10922.320.5µg/m32-Hexanone 70-130 10713.112.3µg/m3Isopropyl Alcohol 70-130 11016.314.8µg/m3Methyl Ethyl Ketone (MEK)70-130 11119.918.0µg/m3Methyl tert-butyl ether (MTBE)70-130 10120.820.5µg/m34-Methyl-2-Pentanone 70-130 Page 9 of 11Date:05/30/2023 03:29 PM Page 44 of 50 Quality Control Data 23-139-0102Report No: Project Description: Client ID:Hart & Hickman (Charlotte) PAM-003 QC Prep Batch Method: Volatile Organic Compounds in Air- GC/MS TO-15 V33777QC Analytical Batch(es): Analysis Method: Analysis Description: TO-15 Prep QC Prep:V33771 LCS-V33771Laboratory Control Sample Parameter LCS %RecLCS Result Spike Conc.Units % Rec Limits 12221.317.4µg/m3Methylene Chloride 70-130 12733.426.2µg/m3Naphthalene 70-130 1159.948.61µg/m3Propene 70-130 10823.121.3µg/m3Styrene 70-130 11138.134.3µg/m31,1,2,2-Tetrachloroethane 70-130 10334.833.9µg/m3Tetrachloroethene 70-130 10114.914.7µg/m3Tetrahydrofuran 70-130 10119.018.8µg/m3Toluene 70-130 12747.137.1µg/m31,2,4-Trichlorobenzene 70-130 99.627.227.3µg/m31,1,1-Trichloroethane 70-130 11230.727.3µg/m31,1,2-Trichloroethane 70-130 10227.526.9µg/m3Trichloroethene 70-130 11431.928.1µg/m3Trichlorofluoromethane 70-130 11528.424.6µg/m31,2,4-Trimethylbenzene 70-130 11127.424.6µg/m31,3,5-Trimethylbenzene 70-130 10318.217.6µg/m3Vinyl Acetate 70-130 12015.312.8µg/m3Vinyl Chloride 70-130 11124.021.7µg/m3o-Xylene 70-130 10445.343.4µg/m3m,p-Xylene 70-130 93.04-Bromofluorobenzene (S)70-130 Page 10 of 11Date:05/30/2023 03:29 PM Page 45 of 50 Quality Control Data 23-139-0102Report No: Project Description: Client ID:Hart & Hickman (Charlotte) PAM-003 QC Prep Batch Method: Volatile Organic Compounds in Air- GC/MS TO-15 V33785QC Analytical Batch(es): Analysis Method: Analysis Description: TO-15 Prep QC Prep:V33784 Associated Lab Samples: 96678 LRB-V33784 Matrix: AIRLab Reagent Blank Parameter AnalyzedMQLMDLBlank ResultUnits % Recovery % Rec Limits 05/26/23 12:174.750.202<0.202µg/m3Acetone 05/26/23 12:174-Bromofluorobenzene (S)90.2 70-130 LCS-V33784Laboratory Control Sample Parameter LCS %RecLCS Result Spike Conc.Units % Rec Limits 11413.611.9µg/m3Acetone 70-130 93.54-Bromofluorobenzene (S)70-130 Page 11 of 11Date:05/30/2023 03:29 PM Page 46 of 50 Fed Ex UPS US Postal Client Lab Courier Other : Shipment Receipt Form Customer Number: Customer Name: Report Number:23-139-0102 Hart & Hickman (Charlotte) 01102 Shipping Method Shipping container/cooler uncompromised? Thermometer ID:N/A Chain of Custody (COC) present?Yes No Yes No Not Present Yes No Not Present Yes No COC agrees with sample label(s)? Yes No COC properly completed Samples in proper containers? Sample containers intact? Sufficient sample volume for indicated test(s)? All samples received within holding time? Cooler temperature in compliance? Yes No Yes No Yes No Yes No Yes No Yes NoCooler/Samples arrived at the laboratory on ice. Samples were considered acceptable as cooling process had begun. Yes No Yes No N/A Yes No N/A Yes No N/ASoil VOA method 5035 – compliance criteria met Water - Sample containers properly preserved Water - VOA vials free of headspace Yes No N/A Trip Blanks received with VOAs Low concentration EnCore samplers (48 hr) High concentration pre-weighed (methanol -14 d) Low conc pre-weighed vials (Sod Bis -14 d) High concentration container (48 hr) Custody seals intact on shipping container/cooler? Custody seals intact on sample bottles? Number of coolers/boxes received Yes No 1 Signature:Angela D Overcash Date & Time:05/19/2023 16:47:52 Special precautions or instructions included? Comments: Page 47 of 50 Page 48 of 50 Page 49 of 50 Page 50 of 50 Appendix E DEQ Risk Calculator Summary Pages Version Date: Basis: Site Name: Site Address: DEQ Section: Site ID: Exposure Unit ID: Submittal Date: Reviewed By: 6/30/2023 Prepared By:Hart & Hickman Hart & Hickman Sub-Slab Vapor Site-Wide Worst-Case North Carolina Department of Environmental Quality Risk Calculator Seoul Food Company 421 East 26th Street, Charlotte, NC DEQ DWM Brownfields 24003-20-060 January 2023 November 2022 EPA RSL Table North Carolina DEQ Risk Calculator Table of Contents Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: Sub-Slab Vapor Site-Wide Worst-Case Form No. Input Form 1A Complete Exposure Pathways Input Form 1B Exposure Factors and Target Risks Input Form 1C Contaminant Migration Parameters Input Form 1D Sample Statistics Input Form 2A Soil Exposure Point Concentration Table Input Form 2B Groundwater Exposure Point Concentration Table Input Form 2C Surface Water Exposure Point Concentration Table Input Form 2D Soil Gas Exposure Point Concentration Table Input Form 2E Indoor Air Exposure Point Concentration Table Output Form 1A Risk for Individual Pathways Output Form 1B Sitewide Risk Output Form 2A Resident Soil Output Form 2B Resident Groundwater Use Output Form 2C Non-Residential Worker Soil Output Form 2D Non-Residential Worker Groundwater Use Output Form 2E Construction Worker Soil Output Form 2F Recreator/Trespasser Soil Output Form 2G Recreator/Trespasser Surface Water Output Form 3A Resident Groundwater to Indoor Air Output Form 3B Resident Soil Gas to Indoor Air Output Form 3C Resident Indoor Air Output Form 3D Non-Residential Worker Groundwater to Indoor Air Output Form 3E Non-Residential Worker Soil Gas to Indoor Air Output Form 3F Non-Residential Worker Indoor Air Output Form 4A Soil to Groundwater - Forward Mode Output Form 4B Groundwater to Groundwater - Forward Mode Output Form 4C Soil to Surface Water - Forward Mode Output Form 4D Groundwater to Surface Water - Forward Mode Output Form 4E Soil to Groundwater - Backward Mode Output Form 4F Groundwater to Groundwater - Backward Mode Output Form 4G Soil to Surface Water - Backward Mode Output Form 4H Groundwater to Surface Water - Backward Mode Output Section 4 - Contaminant Migration Worksheets Output Section 3 - Vapor Intrusion Calculators TOC Description DATA INPUT SHEETS Check box if included Input Section 1 - Exposure Pathways & Parameters Input Section 2 - Exposure Point Concentrations DATA OUTPUT SHEETS Output Section 1 - Summary Output for All Calculators Output Section 2 - Direct Contact Soil and Groundwater Calculators North Carolina DEQ Risk Calculator Complete Exposure Pathways Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: Sub-Slab Vapor Site-Wide Worst-Case Note: Risk output will only be calculated for complete exposure pathways. Receptor Pathway Check box if pathway complete Soil Groundwater Use Soil Groundwater Use Construction Worker Soil Soil Surface Water Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Source Soil Source Groundwater Source Soil Source Groundwater Input Form 1A VAPOR INTRUSION PATHWAYS DIRECT CONTACT SOIL AND WATER PATHWAYS Resident Non-Residential Worker Recreator/Trespasser Resident Non-Residential Worker CONTAMINANT MIGRATION PATHWAYS Groundwater Surface Water North Carolina DEQ Risk Calculator Exposure Point Concentrations Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: Sub-Slab Vapor Site-Wide Worst-Case Description of Exposure Point Concentration Selection: Exposure Point Concentration (ug/m3) Notes: CAS Number Chemical Minimum Concentration (Qualifier) Maximum Concentration (Qualifier) Units Location of Maximum Concentration Detection Frequency Range of Detection Limits Concentration Used for Screening Background Value Screening Toxicity Value (Screening Level) (n/c) Potential ARAR/TBC Value Potential ARAR/TBC Source COPC Flag (Y/N) Rationale for Selection or Deletion 9.99 MP-9 67-64-1 Acetone ug/m3 0.472 MP-3 (J)71-43-2 Benzene ug/m3 1.08 MP-9 (J)75-15-0 Carbon Disulfide ug/m3 5.22 MP-3 67-66-3 Chloroform ug/m3 2.42 MP-9 (J)75-71-8 Dichlorodifluoromethane ug/m3 0.586 MP-3 (J)100-41-4 Ethylbenzene ug/m3 1.86 MP-3 109-99-9 ~Tetrahydrofuran ug/m3 0.315 MP-3 (J)142-82-5 Heptane, N-ug/m3 0.613 MP-3 (J)110-54-3 Hexane, N-ug/m3 2.49 MP-3 (J)67-63-0 Isopropanol ug/m3 1.35 MP-9 (J)78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3 2.01 MP-9 (J)108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3 2.66 MP-9 75-09-2 Methylene Chloride ug/m3 0.477 MP-9 (J)91-20-3 ~Naphthalene ug/m3 5.18 MP-3 100-42-5 Styrene ug/m3 11.7 MP-9 127-18-4 Tetrachloroethylene ug/m3 2.13 MP-3 108-88-3 Toluene ug/m3 1.34 MP-9 (J)71-55-6 Trichloroethane, 1,1,1-ug/m3 131 MP-9 79-01-6 Trichloroethylene ug/m3 1.78 MP-9 (J)75-69-4 Trichlorofluoromethane ug/m3 168 MP-9 95-63-6 Trimethylbenzene, 1,2,4-ug/m3 88.1 MP-9 108-67-8 Trimethylbenzene, 1,3,5-ug/m3 0.792 MP-3 (J)108-05-4 Vinyl Acetate ug/m3 0.46 MP-9 (J)108-38-3 Xylene, m-ug/m3 2.87 MP-9 95-47-6 Xylene, o-ug/m3 Input Form 2D Soil Gas Exposure Point Concentration Table Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals. If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations North Carolina DEQ Risk Calculator Risk for Individual Pathways Output Form 1A Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: Sub-Slab Vapor Site-Wide Worst-Case Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Soil NC NC NC Groundwater Use* NC NC NC Soil NC NC NC Groundwater Use* NC NC NC Construction Worker Soil NC NC NC Soil NC NC NC Surface Water* NC NC NC Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air NC NC NC Indoor Air NC NC NC Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air 5.6E-07 1.6E-01 NO Indoor Air NC NC NC Pathway Source Source Soil NC Source Groundwater NC Source Soil NC Source Groundwater NC 3. NM = Not modeled, user did not check this pathway as complete. 4. NC = Pathway not calculated, required contaminant migration parameters were not entered. DIRECT CONTACT SOIL AND WATER CALCULATORS Resident Non-Residential Worker Recreator/Trespasser 2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based closure. Surface Water Exceedence of 2B at Receptor? Exceedence of 2B at Receptor? VAPOR INTRUSION CALCULATORS Resident Non-Residential Worker CONTAMINANT MIGRATION CALCULATORS Target Receptor Concentrations Exceeded? Groundwater Exceedence of 2L at Receptor? Exceedence of 2L at Receptor? 1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations. Notes: North Carolina DEQ Risk Calculator DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: Sub-Slab Vapor Site-Wide Worst-Case CAS # Chemical Name: Soil Gas Concentration (ug/m3) Calculated Indoor Air Concentration (ug/m3) Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06 Target Indoor Air Conc. for Non- Carcinogens @ THQ = 0.2 Calculated Carcinogenic Risk Calculated Non- Carcinogenic Hazard Quotient 67-64-1 Acetone 9.99 0.0999 - - 71-43-2 Benzene 0.472 0.00472 1.6E+00 2.6E+01 3.0E-09 3.6E-05 75-15-0 Carbon Disulfide 1.08 0.0108 - 6.1E+02 3.5E-06 67-66-3 Chloroform 5.22 0.0522 5.3E-01 8.6E+01 9.8E-08 1.2E-04 75-71-8 Dichlorodifluoromethane 2.42 0.0242 - 8.8E+01 5.5E-05 100-41-4 Ethylbenzene 0.586 0.00586 4.9E+00 8.8E+02 1.2E-09 1.3E-06 109-99-9 ~Tetrahydrofuran 1.86 0.0186 - 1.8E+03 2.1E-06 142-82-5 Heptane, N- 0.315 0.00315 - 3.5E+02 1.8E-06 110-54-3 Hexane, N- 0.613 0.00613 - 6.1E+02 2.0E-06 67-63-0 Isopropanol 2.49 0.0249 - 1.8E+02 2.8E-05 78-93-3 Methyl Ethyl Ketone (2-Butanone) 1.35 0.0135 - 4.4E+03 6.2E-07 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone) 2.01 0.0201 - 2.6E+03 1.5E-06 75-09-2 Methylene Chloride 2.66 0.0266 1.2E+03 5.3E+02 2.2E-11 1.0E-05 91-20-3 ~Naphthalene 0.477 0.00477 3.6E-01 2.6E+00 1.3E-08 3.6E-04 100-42-5 Styrene 5.18 0.0518 - 8.8E+02 1.2E-05 127-18-4 Tetrachloroethylene 11.7 0.117 4.7E+01 3.5E+01 2.5E-09 6.7E-04 108-88-3 Toluene 2.13 0.0213 - 4.4E+03 9.7E-07 71-55-6 Trichloroethane, 1,1,1- 1.34 0.0134 - 4.4E+03 6.1E-07 79-01-6 Trichloroethylene 131 1.31 3.0E+00 1.8E+00 4.4E-07 1.5E-01 75-69-4 Trichlorofluoromethane 1.78 0.0178 - - 95-63-6 Trimethylbenzene, 1,2,4- 168 1.68 - 5.3E+01 6.4E-03 108-67-8 Trimethylbenzene, 1,3,5- 88.1 0.881 - 5.3E+01 3.4E-03 108-05-4 Vinyl Acetate 0.792 0.00792 - 1.8E+02 9.0E-06 108-38-3 Xylene, m- 0.46 0.0046 - 8.8E+01 1.1E-05 95-47-6 Xylene, o- 2.87 0.0287 - 8.8E+01 6.6E-05 Cumulative: 5.6E-07 1.6E-01 All concentrations are in ug/m3 Output Form 3E Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals. North Carolina DEQ Risk Calculator Version Date: Basis: Site Name: Site Address: DEQ Section: Site ID: Exposure Unit ID: Submittal Date: Reviewed By: 6/30/2023 Prepared By:Hart & Hickman Hart & Hickman MP-3 North Carolina Department of Environmental Quality Risk Calculator Seoul Food Company 421 East 26th Street, Charlotte, NC DEQ DWM Brownfields 24003-20-060 January 2023 November 2022 EPA RSL Table North Carolina DEQ Risk Calculator Table of Contents Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: MP-3 Form No. Input Form 1A Complete Exposure Pathways Input Form 1B Exposure Factors and Target Risks Input Form 1C Contaminant Migration Parameters Input Form 1D Sample Statistics Input Form 2A Soil Exposure Point Concentration Table Input Form 2B Groundwater Exposure Point Concentration Table Input Form 2C Surface Water Exposure Point Concentration Table Input Form 2D Soil Gas Exposure Point Concentration Table Input Form 2E Indoor Air Exposure Point Concentration Table Output Form 1A Risk for Individual Pathways Output Form 1B Sitewide Risk Output Form 2A Resident Soil Output Form 2B Resident Groundwater Use Output Form 2C Non-Residential Worker Soil Output Form 2D Non-Residential Worker Groundwater Use Output Form 2E Construction Worker Soil Output Form 2F Recreator/Trespasser Soil Output Form 2G Recreator/Trespasser Surface Water Output Form 3A Resident Groundwater to Indoor Air Output Form 3B Resident Soil Gas to Indoor Air Output Form 3C Resident Indoor Air Output Form 3D Non-Residential Worker Groundwater to Indoor Air Output Form 3E Non-Residential Worker Soil Gas to Indoor Air Output Form 3F Non-Residential Worker Indoor Air Output Form 4A Soil to Groundwater - Forward Mode Output Form 4B Groundwater to Groundwater - Forward Mode Output Form 4C Soil to Surface Water - Forward Mode Output Form 4D Groundwater to Surface Water - Forward Mode Output Form 4E Soil to Groundwater - Backward Mode Output Form 4F Groundwater to Groundwater - Backward Mode Output Form 4G Soil to Surface Water - Backward Mode Output Form 4H Groundwater to Surface Water - Backward Mode Output Section 4 - Contaminant Migration Worksheets Output Section 3 - Vapor Intrusion Calculators TOC Description DATA INPUT SHEETS Check box if included Input Section 1 - Exposure Pathways & Parameters Input Section 2 - Exposure Point Concentrations DATA OUTPUT SHEETS Output Section 1 - Summary Output for All Calculators Output Section 2 - Direct Contact Soil and Groundwater Calculators North Carolina DEQ Risk Calculator Complete Exposure Pathways Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: MP-3 Note: Risk output will only be calculated for complete exposure pathways. Receptor Pathway Check box if pathway complete Soil Groundwater Use Soil Groundwater Use Construction Worker Soil Soil Surface Water Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Source Soil Source Groundwater Source Soil Source Groundwater Input Form 1A VAPOR INTRUSION PATHWAYS DIRECT CONTACT SOIL AND WATER PATHWAYS Resident Non-Residential Worker Recreator/Trespasser Resident Non-Residential Worker CONTAMINANT MIGRATION PATHWAYS Groundwater Surface Water North Carolina DEQ Risk Calculator Exposure Point Concentrations Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: MP-3 Description of Exposure Point Concentration Selection: Exposure Point Concentration (ug/m3) Notes: CAS Number Chemical Minimum Concentration (Qualifier) Maximum Concentration (Qualifier) Units Location of Maximum Concentration Detection Frequency Range of Detection Limits Concentration Used for Screening Background Value Screening Toxicity Value (Screening Level) (n/c) Potential ARAR/TBC Value Potential ARAR/TBC Source COPC Flag (Y/N) Rationale for Selection or Deletion 8.3 67-64-1 Acetone ug/m3 0.472 J 71-43-2 Benzene ug/m3 0.491 J 75-15-0 Carbon Disulfide ug/m3 5.22 67-66-3 Chloroform ug/m3 0.685 J 74-87-3 Chloromethane ug/m3 2.27 J 75-71-8 Dichlorodifluoromethane ug/m3 0.586 J 100-41-4 Ethylbenzene ug/m3 1.86 109-99-9 ~Tetrahydrofuran ug/m3 0.315 J 142-82-5 Heptane, N-ug/m3 0.613 J 110-54-3 Hexane, N-ug/m3 2.49 J 67-63-0 Isopropanol ug/m3 1.11 J 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3 2.1 75-09-2 Methylene Chloride ug/m3 5.18 100-42-5 Styrene ug/m3 2.13 108-88-3 Toluene ug/m3 0.548 J 79-01-6 Trichloroethylene ug/m3 1.42 J 75-69-4 Trichlorofluoromethane ug/m3 13.3 95-63-6 Trimethylbenzene, 1,2,4-ug/m3 4.51 108-67-8 Trimethylbenzene, 1,3,5-ug/m3 0.792 J 108-05-4 Vinyl Acetate ug/m3 0.907 J 95-47-6 Xylene, o-ug/m3 Input Form 2D Soil Gas Exposure Point Concentration Table Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals. If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations North Carolina DEQ Risk Calculator Risk for Individual Pathways Output Form 1A Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: MP-3 Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Soil NC NC NC Groundwater Use* NC NC NC Soil NC NC NC Groundwater Use* NC NC NC Construction Worker Soil NC NC NC Soil NC NC NC Surface Water* NC NC NC Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air NC NC NC Indoor Air NC NC NC Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air 1.0E-07 1.6E-03 NO Indoor Air NC NC NC Pathway Source Source Soil NC Source Groundwater NC Source Soil NC Source Groundwater NC 3. NM = Not modeled, user did not check this pathway as complete. 4. NC = Pathway not calculated, required contaminant migration parameters were not entered. DIRECT CONTACT SOIL AND WATER CALCULATORS Resident Non-Residential Worker Recreator/Trespasser 2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based closure. Surface Water Exceedence of 2B at Receptor? Exceedence of 2B at Receptor? VAPOR INTRUSION CALCULATORS Resident Non-Residential Worker CONTAMINANT MIGRATION CALCULATORS Target Receptor Concentrations Exceeded? Groundwater Exceedence of 2L at Receptor? Exceedence of 2L at Receptor? 1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations. Notes: North Carolina DEQ Risk Calculator DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: MP-3 CAS # Chemical Name: Soil Gas Concentration (ug/m3) Calculated Indoor Air Concentration (ug/m3) Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06 Target Indoor Air Conc. for Non- Carcinogens @ THQ = 0.2 Calculated Carcinogenic Risk Calculated Non- Carcinogenic Hazard Quotient 67-64-1 Acetone 8.3 0.083 - - 71-43-2 Benzene 0.472 0.00472 1.6E+00 2.6E+01 3.0E-09 3.6E-05 75-15-0 Carbon Disulfide 0.491 0.00491 - 6.1E+02 1.6E-06 67-66-3 Chloroform 5.22 0.0522 5.3E-01 8.6E+01 9.8E-08 1.2E-04 74-87-3 Chloromethane 0.685 0.00685 - 7.9E+01 1.7E-05 75-71-8 Dichlorodifluoromethane 2.27 0.0227 - 8.8E+01 5.2E-05 100-41-4 Ethylbenzene 0.586 0.00586 4.9E+00 8.8E+02 1.2E-09 1.3E-06 109-99-9 ~Tetrahydrofuran 1.86 0.0186 - 1.8E+03 2.1E-06 142-82-5 Heptane, N- 0.315 0.00315 - 3.5E+02 1.8E-06 110-54-3 Hexane, N- 0.613 0.00613 - 6.1E+02 2.0E-06 67-63-0 Isopropanol 2.49 0.0249 - 1.8E+02 2.8E-05 78-93-3 Methyl Ethyl Ketone (2-Butanone) 1.11 0.0111 - 4.4E+03 5.1E-07 75-09-2 Methylene Chloride 2.1 0.021 1.2E+03 5.3E+02 1.7E-11 8.0E-06 100-42-5 Styrene 5.18 0.0518 - 8.8E+02 1.2E-05 108-88-3 Toluene 2.13 0.0213 - 4.4E+03 9.7E-07 79-01-6 Trichloroethylene 0.548 0.00548 3.0E+00 1.8E+00 1.8E-09 6.3E-04 75-69-4 Trichlorofluoromethane 1.42 0.0142 - - 95-63-6 Trimethylbenzene, 1,2,4- 13.3 0.133 - 5.3E+01 5.1E-04 108-67-8 Trimethylbenzene, 1,3,5- 4.51 0.0451 - 5.3E+01 1.7E-04 108-05-4 Vinyl Acetate 0.792 0.00792 - 1.8E+02 9.0E-06 95-47-6 Xylene, o- 0.907 0.00907 - 8.8E+01 2.1E-05 Cumulative: 1.0E-07 1.6E-03 All concentrations are in ug/m3 Output Form 3E Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals. North Carolina DEQ Risk Calculator Version Date: Basis: Site Name: Site Address: DEQ Section: Site ID: Exposure Unit ID: Submittal Date: Reviewed By: 6/30/2023 Prepared By:Hart & Hickman Hart & Hickman MP-9 North Carolina Department of Environmental Quality Risk Calculator Seoul Food Company 421 East 26th Street, Charlotte, NC DEQ DWM Brownfields 24003-20-060 January 2023 November 2022 EPA RSL Table North Carolina DEQ Risk Calculator Table of Contents Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: MP-9 Form No. Input Form 1A Complete Exposure Pathways Input Form 1B Exposure Factors and Target Risks Input Form 1C Contaminant Migration Parameters Input Form 1D Sample Statistics Input Form 2A Soil Exposure Point Concentration Table Input Form 2B Groundwater Exposure Point Concentration Table Input Form 2C Surface Water Exposure Point Concentration Table Input Form 2D Soil Gas Exposure Point Concentration Table Input Form 2E Indoor Air Exposure Point Concentration Table Output Form 1A Risk for Individual Pathways Output Form 1B Sitewide Risk Output Form 2A Resident Soil Output Form 2B Resident Groundwater Use Output Form 2C Non-Residential Worker Soil Output Form 2D Non-Residential Worker Groundwater Use Output Form 2E Construction Worker Soil Output Form 2F Recreator/Trespasser Soil Output Form 2G Recreator/Trespasser Surface Water Output Form 3A Resident Groundwater to Indoor Air Output Form 3B Resident Soil Gas to Indoor Air Output Form 3C Resident Indoor Air Output Form 3D Non-Residential Worker Groundwater to Indoor Air Output Form 3E Non-Residential Worker Soil Gas to Indoor Air Output Form 3F Non-Residential Worker Indoor Air Output Form 4A Soil to Groundwater - Forward Mode Output Form 4B Groundwater to Groundwater - Forward Mode Output Form 4C Soil to Surface Water - Forward Mode Output Form 4D Groundwater to Surface Water - Forward Mode Output Form 4E Soil to Groundwater - Backward Mode Output Form 4F Groundwater to Groundwater - Backward Mode Output Form 4G Soil to Surface Water - Backward Mode Output Form 4H Groundwater to Surface Water - Backward Mode Output Section 4 - Contaminant Migration Worksheets Output Section 3 - Vapor Intrusion Calculators TOC Description DATA INPUT SHEETS Check box if included Input Section 1 - Exposure Pathways & Parameters Input Section 2 - Exposure Point Concentrations DATA OUTPUT SHEETS Output Section 1 - Summary Output for All Calculators Output Section 2 - Direct Contact Soil and Groundwater Calculators North Carolina DEQ Risk Calculator Complete Exposure Pathways Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: MP-9 Note: Risk output will only be calculated for complete exposure pathways. Receptor Pathway Check box if pathway complete Soil Groundwater Use Soil Groundwater Use Construction Worker Soil Soil Surface Water Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Source Soil Source Groundwater Source Soil Source Groundwater Input Form 1A VAPOR INTRUSION PATHWAYS DIRECT CONTACT SOIL AND WATER PATHWAYS Resident Non-Residential Worker Recreator/Trespasser Resident Non-Residential Worker CONTAMINANT MIGRATION PATHWAYS Groundwater Surface Water North Carolina DEQ Risk Calculator Exposure Point Concentrations Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: MP-9 Description of Exposure Point Concentration Selection: Exposure Point Concentration (ug/m3) Notes: CAS Number Chemical Minimum Concentration (Qualifier) Maximum Concentration (Qualifier) Units Location of Maximum Concentration Detection Frequency Range of Detection Limits Concentration Used for Screening Background Value Screening Toxicity Value (Screening Level) (n/c) Potential ARAR/TBC Value Potential ARAR/TBC Source COPC Flag (Y/N) Rationale for Selection or Deletion 9.99 67-64-1 Acetone ug/m3 0.396 J 71-43-2 Benzene ug/m3 1.08 J 75-15-0 Carbon Disulfide ug/m3 0.527 J 67-66-3 Chloroform ug/m3 2.42 J 75-71-8 Dichlorodifluoromethane ug/m3 0.542 J 100-41-4 Ethylbenzene ug/m3 1.57 109-99-9 ~Tetrahydrofuran ug/m3 0.401 J 110-54-3 Hexane, N-ug/m3 0.228 J 67-63-0 Isopropanol ug/m3 1.35 J 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3 2.01 J 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3 2.66 75-09-2 Methylene Chloride ug/m3 0.477 J 91-20-3 ~Naphthalene ug/m3 0.613 J 100-42-5 Styrene ug/m3 11.7 127-18-4 Tetrachloroethylene ug/m3 1.42 J 108-88-3 Toluene ug/m3 1.34 J 71-55-6 Trichloroethane, 1,1,1-ug/m3 131 79-01-6 Trichloroethylene ug/m3 1.78 J 75-69-4 Trichlorofluoromethane ug/m3 168 95-63-6 Trimethylbenzene, 1,2,4-ug/m3 88.1 108-67-8 Trimethylbenzene, 1,3,5-ug/m3 0.46 J 108-38-3 Xylene, m-ug/m3 2.87 95-47-6 Xylene, o-ug/m3 Input Form 2D Soil Gas Exposure Point Concentration Table Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals. If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations North Carolina DEQ Risk Calculator Risk for Individual Pathways Output Form 1A Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: MP-9 Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Soil NC NC NC Groundwater Use* NC NC NC Soil NC NC NC Groundwater Use* NC NC NC Construction Worker Soil NC NC NC Soil NC NC NC Surface Water* NC NC NC Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air NC NC NC Indoor Air NC NC NC Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air 4.7E-07 1.6E-01 NO Indoor Air NC NC NC Pathway Source Source Soil NC Source Groundwater NC Source Soil NC Source Groundwater NC 3. NM = Not modeled, user did not check this pathway as complete. 4. NC = Pathway not calculated, required contaminant migration parameters were not entered. DIRECT CONTACT SOIL AND WATER CALCULATORS Resident Non-Residential Worker Recreator/Trespasser 2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based closure. Surface Water Exceedence of 2B at Receptor? Exceedence of 2B at Receptor? VAPOR INTRUSION CALCULATORS Resident Non-Residential Worker CONTAMINANT MIGRATION CALCULATORS Target Receptor Concentrations Exceeded? Groundwater Exceedence of 2L at Receptor? Exceedence of 2L at Receptor? 1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations. Notes: North Carolina DEQ Risk Calculator DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: MP-9 CAS # Chemical Name: Soil Gas Concentration (ug/m3) Calculated Indoor Air Concentration (ug/m3) Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06 Target Indoor Air Conc. for Non- Carcinogens @ THQ = 0.2 Calculated Carcinogenic Risk Calculated Non- Carcinogenic Hazard Quotient 67-64-1 Acetone 9.99 0.0999 - - 71-43-2 Benzene 0.396 0.00396 1.6E+00 2.6E+01 2.5E-09 3.0E-05 75-15-0 Carbon Disulfide 1.08 0.0108 - 6.1E+02 3.5E-06 67-66-3 Chloroform 0.527 0.00527 5.3E-01 8.6E+01 9.9E-09 1.2E-05 75-71-8 Dichlorodifluoromethane 2.42 0.0242 - 8.8E+01 5.5E-05 100-41-4 Ethylbenzene 0.542 0.00542 4.9E+00 8.8E+02 1.1E-09 1.2E-06 109-99-9 ~Tetrahydrofuran 1.57 0.0157 - 1.8E+03 1.8E-06 110-54-3 Hexane, N- 0.401 0.00401 - 6.1E+02 1.3E-06 67-63-0 Isopropanol 0.228 0.00228 - 1.8E+02 2.6E-06 78-93-3 Methyl Ethyl Ketone (2-Butanone) 1.35 0.0135 - 4.4E+03 6.2E-07 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone) 2.01 0.0201 - 2.6E+03 1.5E-06 75-09-2 Methylene Chloride 2.66 0.0266 1.2E+03 5.3E+02 2.2E-11 1.0E-05 91-20-3 ~Naphthalene 0.477 0.00477 3.6E-01 2.6E+00 1.3E-08 3.6E-04 100-42-5 Styrene 0.613 0.00613 - 8.8E+02 1.4E-06 127-18-4 Tetrachloroethylene 11.7 0.117 4.7E+01 3.5E+01 2.5E-09 6.7E-04 108-88-3 Toluene 1.42 0.0142 - 4.4E+03 6.5E-07 71-55-6 Trichloroethane, 1,1,1- 1.34 0.0134 - 4.4E+03 6.1E-07 79-01-6 Trichloroethylene 131 1.31 3.0E+00 1.8E+00 4.4E-07 1.5E-01 75-69-4 Trichlorofluoromethane 1.78 0.0178 - - 95-63-6 Trimethylbenzene, 1,2,4- 168 1.68 - 5.3E+01 6.4E-03 108-67-8 Trimethylbenzene, 1,3,5- 88.1 0.881 - 5.3E+01 3.4E-03 108-38-3 Xylene, m- 0.46 0.0046 - 8.8E+01 1.1E-05 95-47-6 Xylene, o- 2.87 0.0287 - 8.8E+01 6.6E-05 Cumulative: 4.7E-07 1.6E-01 All concentrations are in ug/m3 Output Form 3E Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals. North Carolina DEQ Risk Calculator Version Date: Basis: Site Name: Site Address: DEQ Section: Site ID: Exposure Unit ID: Submittal Date: Reviewed By: 6/30/2023 Prepared By:Hart & Hickman Hart & Hickman IAS Site-Wide Worst-Case North Carolina Department of Environmental Quality Risk Calculator Seoul Food Company 421 East 26th Street, Charlotte, NC DEQ DWM Brownfields 24003-20-060 January 2023 November 2022 EPA RSL Table North Carolina DEQ Risk Calculator Table of Contents Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS Site-Wide Worst-Case Form No. Input Form 1A Complete Exposure Pathways Input Form 1B Exposure Factors and Target Risks Input Form 1C Contaminant Migration Parameters Input Form 1D Sample Statistics Input Form 2A Soil Exposure Point Concentration Table Input Form 2B Groundwater Exposure Point Concentration Table Input Form 2C Surface Water Exposure Point Concentration Table Input Form 2D Soil Gas Exposure Point Concentration Table Input Form 2E Indoor Air Exposure Point Concentration Table Output Form 1A Risk for Individual Pathways Output Form 1B Sitewide Risk Output Form 2A Resident Soil Output Form 2B Resident Groundwater Use Output Form 2C Non-Residential Worker Soil Output Form 2D Non-Residential Worker Groundwater Use Output Form 2E Construction Worker Soil Output Form 2F Recreator/Trespasser Soil Output Form 2G Recreator/Trespasser Surface Water Output Form 3A Resident Groundwater to Indoor Air Output Form 3B Resident Soil Gas to Indoor Air Output Form 3C Resident Indoor Air Output Form 3D Non-Residential Worker Groundwater to Indoor Air Output Form 3E Non-Residential Worker Soil Gas to Indoor Air Output Form 3F Non-Residential Worker Indoor Air Output Form 4A Soil to Groundwater - Forward Mode Output Form 4B Groundwater to Groundwater - Forward Mode Output Form 4C Soil to Surface Water - Forward Mode Output Form 4D Groundwater to Surface Water - Forward Mode Output Form 4E Soil to Groundwater - Backward Mode Output Form 4F Groundwater to Groundwater - Backward Mode Output Form 4G Soil to Surface Water - Backward Mode Output Form 4H Groundwater to Surface Water - Backward Mode Output Section 4 - Contaminant Migration Worksheets Output Section 3 - Vapor Intrusion Calculators TOC Description DATA INPUT SHEETS Check box if included Input Section 1 - Exposure Pathways & Parameters Input Section 2 - Exposure Point Concentrations DATA OUTPUT SHEETS Output Section 1 - Summary Output for All Calculators Output Section 2 - Direct Contact Soil and Groundwater Calculators North Carolina DEQ Risk Calculator Complete Exposure Pathways Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS Site-Wide Worst-Case Note: Risk output will only be calculated for complete exposure pathways. Receptor Pathway Check box if pathway complete Soil Groundwater Use Soil Groundwater Use Construction Worker Soil Soil Surface Water Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Source Soil Source Groundwater Source Soil Source Groundwater Input Form 1A VAPOR INTRUSION PATHWAYS DIRECT CONTACT SOIL AND WATER PATHWAYS Resident Non-Residential Worker Recreator/Trespasser Resident Non-Residential Worker CONTAMINANT MIGRATION PATHWAYS Groundwater Surface Water North Carolina DEQ Risk Calculator Exposure Point Concentrations Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS Site-Wide Worst-Case Description of Exposure Point Concentration Selection: Exposure Point Concentration (ug/m3) Notes: CAS Number Chemical Minimum Concentration (Qualifier) Maximum Concentration (Qualifier) Units Location of Maximum Concentration Detection Frequency Range of Detection Limits Concentration Used for Screening Background Value Screening Toxicity Value (Screening Level) (n/c) Potential ARAR/TBC Value Potential ARAR/TBC Source COPC Flag (Y/N) Rationale for Selection or Deletion 17.9 IAS-2 67-64-1 Acetone ug/m3 0.408 IAS-2 (J)71-43-2 Benzene ug/m3 1.31 IAS-1 (JB)75-15-0 Carbon Disulfide ug/m3 7.56 IAS-2 67-66-3 Chloroform ug/m3 0.768 IAS-DUP (J)74-87-3 Chloromethane ug/m3 2.53 IAS-1 75-71-8 Dichlorodifluoromethane ug/m3 2.57 IAS-2 141-78-6 Ethyl Acetate ug/m3 0.468 IAS-DUP (J)109-99-9 ~Tetrahydrofuran ug/m3 0.688 IAS-DUP (J)142-82-5 Heptane, N-ug/m3 0.641 IAS-1 (J)110-54-3 Hexane, N-ug/m3 1.6 IAS-1 (J)67-63-0 Isopropanol ug/m3 2.06 IAS-2 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3 2.39 IAS-1 100-42-5 Styrene ug/m3 0.678 IAS-DUP (J)127-18-4 Tetrachloroethylene ug/m3 2.4 IAS-2 108-88-3 Toluene ug/m3 1.78 IAS-DUP (J)75-69-4 Trichlorofluoromethane ug/m3 2.35 IAS-3 (J)95-63-6 Trimethylbenzene, 1,2,4-ug/m3 0.806 IAS-3 (J)108-67-8 Trimethylbenzene, 1,3,5-ug/m3 Input Form 2E Indoor Air Exposure Point Concentration Table Note: Chemicals highlighted in orange are non-volatile chemicals. Risks are calculated for these chemicals if indoor air concentrations are entered and indoor air screening levels have been established, but it should be noted that detections of these chemicals are likely not associated with vapor intrusion. If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations North Carolina DEQ Risk Calculator Risk for Individual Pathways Output Form 1A Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS Site-Wide Worst-Case Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Soil NC NC NC Groundwater Use* NC NC NC Soil NC NC NC Groundwater Use* NC NC NC Construction Worker Soil NC NC NC Soil NC NC NC Surface Water* NC NC NC Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air NC NC NC Indoor Air NC NC NC Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air NC NC NC Indoor Air 1.4E-05 5.6E-02 NO Pathway Source Source Soil NC Source Groundwater NC Source Soil NC Source Groundwater NC 3. NM = Not modeled, user did not check this pathway as complete. 4. NC = Pathway not calculated, required contaminant migration parameters were not entered. DIRECT CONTACT SOIL AND WATER CALCULATORS Resident Non-Residential Worker Recreator/Trespasser 2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based closure. Surface Water Exceedence of 2B at Receptor? Exceedence of 2B at Receptor? VAPOR INTRUSION CALCULATORS Resident Non-Residential Worker CONTAMINANT MIGRATION CALCULATORS Target Receptor Concentrations Exceeded? Groundwater Exceedence of 2L at Receptor? Exceedence of 2L at Receptor? 1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations. Notes: North Carolina DEQ Risk Calculator DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Indoor Air Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS Site-Wide Worst-Case CAS # Chemical Name: Indoor Air Concentration (ug/m3) Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06 Target Indoor Air Conc. for Non- Carcinogens @ THQ = 0.2 Calculated Carcinogenic Risk Calculated Non- Carcinogenic Hazard Quotient 67-64-1 Acetone 17.9 - - 71-43-2 Benzene 0.408 1.6E+00 2.6E+01 2.6E-07 3.1E-03 75-15-0 Carbon Disulfide 1.31 - 6.1E+02 4.3E-04 67-66-3 Chloroform 7.56 5.3E-01 8.6E+01 1.4E-05 1.8E-02 74-87-3 Chloromethane 0.768 - 7.9E+01 1.9E-03 75-71-8 Dichlorodifluoromethane 2.53 - 8.8E+01 5.8E-03 141-78-6 Ethyl Acetate 2.57 - 6.1E+01 8.4E-03 109-99-9 ~Tetrahydrofuran 0.468 - 1.8E+03 5.3E-05 142-82-5 Heptane, N- 0.688 - 3.5E+02 3.9E-04 110-54-3 Hexane, N- 0.641 - 6.1E+02 2.1E-04 67-63-0 Isopropanol 1.6 - 1.8E+02 1.8E-03 78-93-3 Methyl Ethyl Ketone (2-Butanone) 2.06 - 4.4E+03 9.4E-05 100-42-5 Styrene 2.39 - 8.8E+02 5.5E-04 127-18-4 Tetrachloroethylene 0.678 4.7E+01 3.5E+01 1.4E-08 3.9E-03 108-88-3 Toluene 2.4 - 4.4E+03 1.1E-04 75-69-4 Trichlorofluoromethane 1.78 - - 95-63-6 Trimethylbenzene, 1,2,4- 2.35 - 5.3E+01 8.9E-03 108-67-8 Trimethylbenzene, 1,3,5- 0.806 - 5.3E+01 3.1E-03 Cumulative: 1.4E-05 5.6E-02 All concentrations are in u /3 Output Form 3F ** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate carcinogenic risk or hazard quotient. Lead concentrations are compared to the National Ambient Air Quality Standard of 0.15 μg/m3. Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Risks are calculated for these values if indoor air concentrations are entered and indoor air screening levels have been established, but it should be noted that detections of these chemicals are likely not associated with vapor intrusion. North Carolina DEQ Risk Calculator Version Date: Basis: Site Name: Site Address: DEQ Section: Site ID: Exposure Unit ID: Submittal Date: Reviewed By: IAS-1/IAS-DUP North Carolina Department of Environmental Quality Risk Calculator Seoul Food Company 421 East 26th Street, Charlotte, NC DEQ DWM Brownfields 24003-20-060 January 2023 November 2022 EPA RSL Table 6/30/2023 Prepared By:Hart & Hickman Hart & Hickman North Carolina DEQ Risk Calculator Table of Contents Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-1/IAS-DUP Form No. Input Form 1A Complete Exposure Pathways Input Form 1B Exposure Factors and Target Risks Input Form 1C Contaminant Migration Parameters Input Form 1D Sample Statistics Input Form 2A Soil Exposure Point Concentration Table Input Form 2B Groundwater Exposure Point Concentration Table Input Form 2C Surface Water Exposure Point Concentration Table Input Form 2D Soil Gas Exposure Point Concentration Table Input Form 2E Indoor Air Exposure Point Concentration Table Output Form 1A Risk for Individual Pathways Output Form 1B Sitewide Risk Output Form 2A Resident Soil Output Form 2B Resident Groundwater Use Output Form 2C Non-Residential Worker Soil Output Form 2D Non-Residential Worker Groundwater Use Output Form 2E Construction Worker Soil Output Form 2F Recreator/Trespasser Soil Output Form 2G Recreator/Trespasser Surface Water Output Form 3A Resident Groundwater to Indoor Air Output Form 3B Resident Soil Gas to Indoor Air Output Form 3C Resident Indoor Air Output Form 3D Non-Residential Worker Groundwater to Indoor Air Output Form 3E Non-Residential Worker Soil Gas to Indoor Air Output Form 3F Non-Residential Worker Indoor Air Output Form 4A Soil to Groundwater - Forward Mode Output Form 4B Groundwater to Groundwater - Forward Mode Output Form 4C Soil to Surface Water - Forward Mode Output Form 4D Groundwater to Surface Water - Forward Mode Output Form 4E Soil to Groundwater - Backward Mode Output Form 4F Groundwater to Groundwater - Backward Mode Output Form 4G Soil to Surface Water - Backward Mode Output Form 4H Groundwater to Surface Water - Backward Mode Output Section 4 - Contaminant Migration Worksheets Output Section 3 - Vapor Intrusion Calculators TOC Description DATA INPUT SHEETS Check box if included Input Section 1 - Exposure Pathways & Parameters Input Section 2 - Exposure Point Concentrations DATA OUTPUT SHEETS Output Section 1 - Summary Output for All Calculators Output Section 2 - Direct Contact Soil and Groundwater Calculators North Carolina DEQ Risk Calculator Complete Exposure Pathways Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-1/IAS-DUP Note: Risk output will only be calculated for complete exposure pathways. Receptor Pathway Check box if pathway complete Soil Groundwater Use Soil Groundwater Use Construction Worker Soil Soil Surface Water Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Source Soil Source Groundwater Source Soil Source Groundwater Resident Non-Residential Worker CONTAMINANT MIGRATION PATHWAYS Groundwater Surface Water Input Form 1A VAPOR INTRUSION PATHWAYS DIRECT CONTACT SOIL AND WATER PATHWAYS Resident Non-Residential Worker Recreator/Trespasser North Carolina DEQ Risk Calculator Exposure Point Concentrations Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-1/IAS-DUP Description of Exposure Point Concentration Selection: Exposure Point Concentration (ug/m3) Notes: CAS Number Chemical Minimum Concentration (Qualifier) Maximum Concentration (Qualifier) Units Location of Maximum Concentration Detection Frequency Range of Detection Limits Concentration Used for Screening Background Value Screening Toxicity Value (Screening Level) (n/c) Potential ARAR/TBC Value Potential ARAR/TBC Source COPC Flag (Y/N) Rationale for Selection or Deletion 14.9 IAS-DUP 67-64-1 Acetone ug/m3 0.383 IAS-1 (J)71-43-2 Benzene ug/m3 1.31 IAS-1 (JB)75-15-0 Carbon Disulfide ug/m3 3.17 IAS-1 67-66-3 Chloroform ug/m3 0.768 IAS-DUP (J)74-87-3 Chloromethane ug/m3 2.53 IAS-1 75-71-8 Dichlorodifluoromethane ug/m3 2.37 IAS-1 141-78-6 Ethyl Acetate ug/m3 0.468 IAS-DUP (J)109-99-9 ~Tetrahydrofuran ug/m3 0.688 IAS-DUP (J)142-82-5 Heptane, N-ug/m3 0.641 IAS-1 (J)110-54-3 Hexane, N-ug/m3 1.6 IAS-1 (J)67-63-0 Isopropanol ug/m3 1.86 IAS-DUP 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3 2.39 IAS-1 100-42-5 Styrene ug/m3 0.678 IAS-DUP (J)127-18-4 Tetrachloroethylene ug/m3 1.39 IAS-1 (J)108-88-3 Toluene ug/m3 1.78 IAS-DUP (J)75-69-4 Trichlorofluoromethane ug/m3 1.94 IAS-1 (J)95-63-6 Trimethylbenzene, 1,2,4-ug/m3 0.722 IAS-1 (J)108-67-8 Trimethylbenzene, 1,3,5-ug/m3 Input Form 2E Indoor Air Exposure Point Concentration Table Note: Chemicals highlighted in orange are non-volatile chemicals. Risks are calculated for these chemicals if indoor air concentrations are entered and indoor air screening levels have been established, but it should be noted that detections of these chemicals are likely not associated with vapor intrusion. If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations North Carolina DEQ Risk Calculator Risk for Individual Pathways Output Form 1A Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-1/IAS-DUP Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Soil NC NC NC Groundwater Use* NC NC NC Soil NC NC NC Groundwater Use* NC NC NC Construction Worker Soil NC NC NC Soil NC NC NC Surface Water* NC NC NC Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air NC NC NC Indoor Air NC NC NC Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air NC NC NC Indoor Air 6.2E-06 4.3E-02 NO Pathway Source Source Soil NC Source Groundwater NC Source Soil NC Source Groundwater NC Groundwater Exceedence of 2L at Receptor? Exceedence of 2L at Receptor? 1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations. Notes: 3. NM = Not modeled, user did not check this pathway as complete. 4. NC = Pathway not calculated, required contaminant migration parameters were not entered. DIRECT CONTACT SOIL AND WATER CALCULATORS Resident Non-Residential Worker Recreator/Trespasser 2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based closure. Surface Water Exceedence of 2B at Receptor? Exceedence of 2B at Receptor? VAPOR INTRUSION CALCULATORS Resident Non-Residential Worker CONTAMINANT MIGRATION CALCULATORS Target Receptor Concentrations Exceeded? North Carolina DEQ Risk Calculator DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Indoor Air Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-1/IAS-DUP CAS # Chemical Name: Indoor Air Concentration (ug/m3) Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06 Target Indoor Air Conc. for Non- Carcinogens @ THQ = 0.2 Calculated Carcinogenic Risk Calculated Non- Carcinogenic Hazard Quotient 67-64-1 Acetone 14.9 - - 71-43-2 Benzene 0.383 1.6E+00 2.6E+01 2.4E-07 2.9E-03 75-15-0 Carbon Disulfide 1.31 - 6.1E+02 4.3E-04 67-66-3 Chloroform 3.17 5.3E-01 8.6E+01 5.9E-06 7.4E-03 74-87-3 Chloromethane 0.768 - 7.9E+01 1.9E-03 75-71-8 Dichlorodifluoromethane 2.53 - 8.8E+01 5.8E-03 141-78-6 Ethyl Acetate 2.37 - 6.1E+01 7.7E-03 109-99-9 ~Tetrahydrofuran 0.468 - 1.8E+03 5.3E-05 142-82-5 Heptane, N- 0.688 - 3.5E+02 3.9E-04 110-54-3 Hexane, N- 0.641 - 6.1E+02 2.1E-04 67-63-0 Isopropanol 1.6 - 1.8E+02 1.8E-03 78-93-3 Methyl Ethyl Ketone (2-Butanone) 1.86 - 4.4E+03 8.5E-05 100-42-5 Styrene 2.39 - 8.8E+02 5.5E-04 127-18-4 Tetrachloroethylene 0.678 4.7E+01 3.5E+01 1.4E-08 3.9E-03 108-88-3 Toluene 1.39 - 4.4E+03 6.3E-05 75-69-4 Trichlorofluoromethane 1.78 - - 95-63-6 Trimethylbenzene, 1,2,4- 1.94 - 5.3E+01 7.4E-03 108-67-8 Trimethylbenzene, 1,3,5- 0.722 - 5.3E+01 2.7E-03 Cumulative: 6.2E-06 4.3E-02 All concentrations are in u /3 Output Form 3F ** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate carcinogenic risk or hazard quotient. Lead concentrations are compared to the National Ambient Air Quality Standard of 0.15 μg/m3. Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Risks are calculated for these values if indoor air concentrations are entered and indoor air screening levels have been established, but it should be noted that detections of these chemicals are likely not associated with vapor intrusion. North Carolina DEQ Risk Calculator Version Date: Basis: Site Name: Site Address: DEQ Section: Site ID: Exposure Unit ID: Submittal Date: Reviewed By: IAS-2 North Carolina Department of Environmental Quality Risk Calculator Seoul Food Company 421 East 26th Street, Charlotte, NC DEQ DWM Brownfields 24003-20-060 January 2023 November 2022 EPA RSL Table 6/30/2023 Prepared By:Hart & Hickman Hart & Hickman North Carolina DEQ Risk Calculator Table of Contents Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-2 Form No. Input Form 1A Complete Exposure Pathways Input Form 1B Exposure Factors and Target Risks Input Form 1C Contaminant Migration Parameters Input Form 1D Sample Statistics Input Form 2A Soil Exposure Point Concentration Table Input Form 2B Groundwater Exposure Point Concentration Table Input Form 2C Surface Water Exposure Point Concentration Table Input Form 2D Soil Gas Exposure Point Concentration Table Input Form 2E Indoor Air Exposure Point Concentration Table Output Form 1A Risk for Individual Pathways Output Form 1B Sitewide Risk Output Form 2A Resident Soil Output Form 2B Resident Groundwater Use Output Form 2C Non-Residential Worker Soil Output Form 2D Non-Residential Worker Groundwater Use Output Form 2E Construction Worker Soil Output Form 2F Recreator/Trespasser Soil Output Form 2G Recreator/Trespasser Surface Water Output Form 3A Resident Groundwater to Indoor Air Output Form 3B Resident Soil Gas to Indoor Air Output Form 3C Resident Indoor Air Output Form 3D Non-Residential Worker Groundwater to Indoor Air Output Form 3E Non-Residential Worker Soil Gas to Indoor Air Output Form 3F Non-Residential Worker Indoor Air Output Form 4A Soil to Groundwater - Forward Mode Output Form 4B Groundwater to Groundwater - Forward Mode Output Form 4C Soil to Surface Water - Forward Mode Output Form 4D Groundwater to Surface Water - Forward Mode Output Form 4E Soil to Groundwater - Backward Mode Output Form 4F Groundwater to Groundwater - Backward Mode Output Form 4G Soil to Surface Water - Backward Mode Output Form 4H Groundwater to Surface Water - Backward Mode Output Section 4 - Contaminant Migration Worksheets Output Section 3 - Vapor Intrusion Calculators TOC Description DATA INPUT SHEETS Check box if included Input Section 1 - Exposure Pathways & Parameters Input Section 2 - Exposure Point Concentrations DATA OUTPUT SHEETS Output Section 1 - Summary Output for All Calculators Output Section 2 - Direct Contact Soil and Groundwater Calculators North Carolina DEQ Risk Calculator Complete Exposure Pathways Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-2 Note: Risk output will only be calculated for complete exposure pathways. Receptor Pathway Check box if pathway complete Soil Groundwater Use Soil Groundwater Use Construction Worker Soil Soil Surface Water Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Source Soil Source Groundwater Source Soil Source Groundwater Resident Non-Residential Worker CONTAMINANT MIGRATION PATHWAYS Groundwater Surface Water Input Form 1A VAPOR INTRUSION PATHWAYS DIRECT CONTACT SOIL AND WATER PATHWAYS Resident Non-Residential Worker Recreator/Trespasser North Carolina DEQ Risk Calculator Exposure Point Concentrations Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-2 Description of Exposure Point Concentration Selection: Exposure Point Concentration (ug/m3) Notes: CAS Number Chemical Minimum Concentration (Qualifier) Maximum Concentration (Qualifier) Units Location of Maximum Concentration Detection Frequency Range of Detection Limits Concentration Used for Screening Background Value Screening Toxicity Value (Screening Level) (n/c) Potential ARAR/TBC Value Potential ARAR/TBC Source COPC Flag (Y/N) Rationale for Selection or Deletion 17.9 67-64-1 Acetone ug/m3 0.408 J 71-43-2 Benzene ug/m3 7.56 67-66-3 Chloroform ug/m3 0.755 J 74-87-3 Chloromethane ug/m3 2.35 J 75-71-8 Dichlorodifluoromethane ug/m3 2.57 141-78-6 Ethyl Acetate ug/m3 0.353 J 109-99-9 ~Tetrahydrofuran ug/m3 0.639 J 142-82-5 Heptane, N-ug/m3 0.613 J 110-54-3 Hexane, N-ug/m3 0.978 J 67-63-0 Isopropanol ug/m3 2.06 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3 1.35 J 100-42-5 Styrene ug/m3 2.4 108-88-3 Toluene ug/m3 1.46 J 75-69-4 Trichlorofluoromethane ug/m3 0.56 J 95-63-6 Trimethylbenzene, 1,2,4-ug/m3 Input Form 2E Indoor Air Exposure Point Concentration Table Note: Chemicals highlighted in orange are non-volatile chemicals. Risks are calculated for these chemicals if indoor air concentrations are entered and indoor air screening levels have been established, but it should be noted that detections of these chemicals are likely not associated with vapor intrusion. If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations North Carolina DEQ Risk Calculator Risk for Individual Pathways Output Form 1A Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-2 Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Soil NC NC NC Groundwater Use* NC NC NC Soil NC NC NC Groundwater Use* NC NC NC Construction Worker Soil NC NC NC Soil NC NC NC Surface Water* NC NC NC Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air NC NC NC Indoor Air NC NC NC Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air NC NC NC Indoor Air 1.4E-05 4.1E-02 NO Pathway Source Source Soil NC Source Groundwater NC Source Soil NC Source Groundwater NC Groundwater Exceedence of 2L at Receptor? Exceedence of 2L at Receptor? 1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations. Notes: 3. NM = Not modeled, user did not check this pathway as complete. 4. NC = Pathway not calculated, required contaminant migration parameters were not entered. DIRECT CONTACT SOIL AND WATER CALCULATORS Resident Non-Residential Worker Recreator/Trespasser 2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based closure. Surface Water Exceedence of 2B at Receptor? Exceedence of 2B at Receptor? VAPOR INTRUSION CALCULATORS Resident Non-Residential Worker CONTAMINANT MIGRATION CALCULATORS Target Receptor Concentrations Exceeded? North Carolina DEQ Risk Calculator DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Indoor Air Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-2 CAS # Chemical Name: Indoor Air Concentration (ug/m3) Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06 Target Indoor Air Conc. for Non- Carcinogens @ THQ = 0.2 Calculated Carcinogenic Risk Calculated Non- Carcinogenic Hazard Quotient 67-64-1 Acetone 17.9 - - 71-43-2 Benzene 0.408 1.6E+00 2.6E+01 2.6E-07 3.1E-03 67-66-3 Chloroform 7.56 5.3E-01 8.6E+01 1.4E-05 1.8E-02 74-87-3 Chloromethane 0.755 - 7.9E+01 1.9E-03 75-71-8 Dichlorodifluoromethane 2.35 - 8.8E+01 5.4E-03 141-78-6 Ethyl Acetate 2.57 - 6.1E+01 8.4E-03 109-99-9 ~Tetrahydrofuran 0.353 - 1.8E+03 4.0E-05 142-82-5 Heptane, N- 0.639 - 3.5E+02 3.6E-04 110-54-3 Hexane, N- 0.613 - 6.1E+02 2.0E-04 67-63-0 Isopropanol 0.978 - 1.8E+02 1.1E-03 78-93-3 Methyl Ethyl Ketone (2-Butanone) 2.06 - 4.4E+03 9.4E-05 100-42-5 Styrene 1.35 - 8.8E+02 3.1E-04 108-88-3 Toluene 2.4 - 4.4E+03 1.1E-04 75-69-4 Trichlorofluoromethane 1.46 - - 95-63-6 Trimethylbenzene, 1,2,4- 0.56 - 5.3E+01 2.1E-03 Cumulative: 1.4E-05 4.1E-02 All concentrations are in u /3 Output Form 3F ** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate carcinogenic risk or hazard quotient. Lead concentrations are compared to the National Ambient Air Quality Standard of 0.15 μg/m3. Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Risks are calculated for these values if indoor air concentrations are entered and indoor air screening levels have been established, but it should be noted that detections of these chemicals are likely not associated with vapor intrusion. North Carolina DEQ Risk Calculator Version Date: Basis: Site Name: Site Address: DEQ Section: Site ID: Exposure Unit ID: Submittal Date: Reviewed By: IAS-3 North Carolina Department of Environmental Quality Risk Calculator Seoul Food Company 421 East 26th Street, Charlotte, NC DEQ DWM Brownfields 24003-20-060 January 2023 November 2022 EPA RSL Table 6/30/2023 Prepared By:Hart & Hickman Hart & Hickman North Carolina DEQ Risk Calculator Table of Contents Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-3 Form No. Input Form 1A Complete Exposure Pathways Input Form 1B Exposure Factors and Target Risks Input Form 1C Contaminant Migration Parameters Input Form 1D Sample Statistics Input Form 2A Soil Exposure Point Concentration Table Input Form 2B Groundwater Exposure Point Concentration Table Input Form 2C Surface Water Exposure Point Concentration Table Input Form 2D Soil Gas Exposure Point Concentration Table Input Form 2E Indoor Air Exposure Point Concentration Table Output Form 1A Risk for Individual Pathways Output Form 1B Sitewide Risk Output Form 2A Resident Soil Output Form 2B Resident Groundwater Use Output Form 2C Non-Residential Worker Soil Output Form 2D Non-Residential Worker Groundwater Use Output Form 2E Construction Worker Soil Output Form 2F Recreator/Trespasser Soil Output Form 2G Recreator/Trespasser Surface Water Output Form 3A Resident Groundwater to Indoor Air Output Form 3B Resident Soil Gas to Indoor Air Output Form 3C Resident Indoor Air Output Form 3D Non-Residential Worker Groundwater to Indoor Air Output Form 3E Non-Residential Worker Soil Gas to Indoor Air Output Form 3F Non-Residential Worker Indoor Air Output Form 4A Soil to Groundwater - Forward Mode Output Form 4B Groundwater to Groundwater - Forward Mode Output Form 4C Soil to Surface Water - Forward Mode Output Form 4D Groundwater to Surface Water - Forward Mode Output Form 4E Soil to Groundwater - Backward Mode Output Form 4F Groundwater to Groundwater - Backward Mode Output Form 4G Soil to Surface Water - Backward Mode Output Form 4H Groundwater to Surface Water - Backward Mode Output Section 4 - Contaminant Migration Worksheets Output Section 3 - Vapor Intrusion Calculators TOC Description DATA INPUT SHEETS Check box if included Input Section 1 - Exposure Pathways & Parameters Input Section 2 - Exposure Point Concentrations DATA OUTPUT SHEETS Output Section 1 - Summary Output for All Calculators Output Section 2 - Direct Contact Soil and Groundwater Calculators North Carolina DEQ Risk Calculator Complete Exposure Pathways Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-3 Note: Risk output will only be calculated for complete exposure pathways. Receptor Pathway Check box if pathway complete Soil Groundwater Use Soil Groundwater Use Construction Worker Soil Soil Surface Water Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Groundwater to Indoor Air Soil Gas to Indoor Air Indoor Air Source Soil Source Groundwater Source Soil Source Groundwater Resident Non-Residential Worker CONTAMINANT MIGRATION PATHWAYS Groundwater Surface Water Input Form 1A VAPOR INTRUSION PATHWAYS DIRECT CONTACT SOIL AND WATER PATHWAYS Resident Non-Residential Worker Recreator/Trespasser North Carolina DEQ Risk Calculator Exposure Point Concentrations Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-3 Description of Exposure Point Concentration Selection: Exposure Point Concentration (ug/m3) Notes: CAS Number Chemical Minimum Concentration (Qualifier) Maximum Concentration (Qualifier) Units Location of Maximum Concentration Detection Frequency Range of Detection Limits Concentration Used for Screening Background Value Screening Toxicity Value (Screening Level) (n/c) Potential ARAR/TBC Value Potential ARAR/TBC Source COPC Flag (Y/N) Rationale for Selection or Deletion 16.7 67-64-1 Acetone ug/m3 0.389 J 71-43-2 Benzene ug/m3 1.34 J 67-66-3 Chloroform ug/m3 0.689 J 74-87-3 Chloromethane ug/m3 2.31 J 75-71-8 Dichlorodifluoromethane ug/m3 0.724 141-78-6 Ethyl Acetate ug/m3 0.418 J 142-82-5 Heptane, N-ug/m3 0.563 J 110-54-3 Hexane, N-ug/m3 0.235 J 67-63-0 Isopropanol ug/m3 1.42 J 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3 1.38 J 100-42-5 Styrene ug/m3 1.23 J 108-88-3 Toluene ug/m3 1.39 J 75-69-4 Trichlorofluoromethane ug/m3 2.35 J 95-63-6 Trimethylbenzene, 1,2,4-ug/m3 0.806 J 108-67-8 Trimethylbenzene, 1,3,5-ug/m3 Input Form 2E Indoor Air Exposure Point Concentration Table Note: Chemicals highlighted in orange are non-volatile chemicals. Risks are calculated for these chemicals if indoor air concentrations are entered and indoor air screening levels have been established, but it should be noted that detections of these chemicals are likely not associated with vapor intrusion. If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations North Carolina DEQ Risk Calculator Risk for Individual Pathways Output Form 1A Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-3 Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Soil NC NC NC Groundwater Use* NC NC NC Soil NC NC NC Groundwater Use* NC NC NC Construction Worker Soil NC NC NC Soil NC NC NC Surface Water* NC NC NC Receptor Pathway Carcinogenic Ris Hazard Index Risk exceeded? Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air NC NC NC Indoor Air NC NC NC Groundwater to Indoor Air NC NC NC Soil Gas to Indoor Air NC NC NC Indoor Air 2.8E-06 2.9E-02 NO Pathway Source Source Soil NC Source Groundwater NC Source Soil NC Source Groundwater NC Groundwater Exceedence of 2L at Receptor? Exceedence of 2L at Receptor? 1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations. Notes: 3. NM = Not modeled, user did not check this pathway as complete. 4. NC = Pathway not calculated, required contaminant migration parameters were not entered. DIRECT CONTACT SOIL AND WATER CALCULATORS Resident Non-Residential Worker Recreator/Trespasser 2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based closure. Surface Water Exceedence of 2B at Receptor? Exceedence of 2B at Receptor? VAPOR INTRUSION CALCULATORS Resident Non-Residential Worker CONTAMINANT MIGRATION CALCULATORS Target Receptor Concentrations Exceeded? North Carolina DEQ Risk Calculator DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Indoor Air Version Date: January 2023 Basis: November 2022 EPA RSL Table Site ID: 24003-20-060 Exposure Unit ID: IAS-3 CAS # Chemical Name: Indoor Air Concentration (ug/m3) Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06 Target Indoor Air Conc. for Non- Carcinogens @ THQ = 0.2 Calculated Carcinogenic Risk Calculated Non- Carcinogenic Hazard Quotient 67-64-1 Acetone 16.7 - - 71-43-2 Benzene 0.389 1.6E+00 2.6E+01 2.5E-07 3.0E-03 67-66-3 Chloroform 1.34 5.3E-01 8.6E+01 2.5E-06 3.1E-03 74-87-3 Chloromethane 0.689 - 7.9E+01 1.7E-03 75-71-8 Dichlorodifluoromethane 2.31 - 8.8E+01 5.3E-03 141-78-6 Ethyl Acetate 0.724 - 6.1E+01 2.4E-03 142-82-5 Heptane, N- 0.418 - 3.5E+02 2.4E-04 110-54-3 Hexane, N- 0.563 - 6.1E+02 1.8E-04 67-63-0 Isopropanol 0.235 - 1.8E+02 2.7E-04 78-93-3 Methyl Ethyl Ketone (2-Butanone) 1.42 - 4.4E+03 6.5E-05 100-42-5 Styrene 1.38 - 8.8E+02 3.2E-04 108-88-3 Toluene 1.23 - 4.4E+03 5.6E-05 75-69-4 Trichlorofluoromethane 1.39 - - 95-63-6 Trimethylbenzene, 1,2,4- 2.35 - 5.3E+01 8.9E-03 108-67-8 Trimethylbenzene, 1,3,5- 0.806 - 5.3E+01 3.1E-03 Cumulative: 2.8E-06 2.9E-02 All concentrations are in u /3 Output Form 3F ** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate carcinogenic risk or hazard quotient. Lead concentrations are compared to the National Ambient Air Quality Standard of 0.15 μg/m3. Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Risks are calculated for these values if indoor air concentrations are entered and indoor air screening levels have been established, but it should be noted that detections of these chemicals are likely not associated with vapor intrusion. North Carolina DEQ Risk Calculator