The URL can be used to link to this page

Home My WebLink About17038_Goodyear_Tryon Place Soil and Soil Gas Summary Report 20180517 SOIL AND SOIL GAS SAMPLING REPORT FORMER GOODYEAR SERVICE CENTER CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA BROWNFIELDS PROJECT No. 17038-13-060 ECS PROJECT NO. 49.5350 PREPARED FOR CRESCENT SOUTH TRYON, LLC MAY 17, 2018 Soil and Soil Gas Sampling Report Former Goodyear Service Center Brownfields Project No. 17038-13-060 ECS Project No. 49-5350 May 17, 2018 1 TABLE OF CONTENTS 1.0 PROJECT INFORMATION ................................................................................................... 2 2.0 PREVIOUS INVESTIGATIONS ............................................................................................. 2 3.0 PROPOSED DEVELOPMENT ......................................................................................... 2 4.0 OBJECTIVE OF THE WORKPLAN ....................................................................................... 2 5.0 SAMPLE COLLECTION ........................................................................................................ 3 5.1 Soil Gas ............................................................................................................................ 3 5.2 Soil Samples ..................................................................................................................... 5 6.0 RESULTS ............................................................................................................................. 6 6.1 Soil Gas Analysis ............................................................................................................. 6 6.2 Soil Sample Analysis ........................................................................................................ 8 7.0 CONCLUSIONS .................................................................................................................... 9 FIGURES Figure 1 Site Location Map Figure 2 Site Map Figure 3 Preliminary Site Development Plan Figure 4 Preliminary Site Development Plan with Sample Locations TABLES Table 1 Soil Gas Sample Results Table 2 Soil Sample Results APPENDICES Appendix A Brownfields Survey Plat Appendix B Exhibit C – Summary of Soil and Groundwater Contaminants Appendix C Soil Gas Sample Laboratory Report Appendix D Risk Calculators Appendix E Soil Sample Laboratory Report Appendix F Soil Gas Data Sheets Soil and Soil Gas Sampling Report Former Goodyear Service Center Brownfields Project No. 17038-13-060 ECS Project No. 49-5350 May 17, 2018 2 1.0 PROJECT INFORMATION The site is currently comprised of four parcels identified as Mecklenburg Parcel ID Nos. 12512105, 12512103, 12512102, and 12512101 located in Charlotte, Mecklenburg County, North Carolina. The parcels included in the Brownfields site are shown on Exhibit B – Draft Survey Plat included as Appendix A. The four parcels together total approximately 3.5 acres and are each owned by 601 South Tryon, LLC. The site was formerly developed with a parking lot and three buildings; the Former Goodyear Service Center, a 27,000 square foot office building, and a 45,000 square foot office building. These improvements have been demolished in connection with the redevelopment of the property. The location of the site is shown on Figures 1 and 2. 2.0 PREVIOUS INVESTIGATIONS ECS conducted a soil and groundwater assessment of the Former Goodyear Service Center property in October/November 2013. ECS also conducted an assessment of the former gasoline station and former automobile dealership on the north side of the site along Tryon Street in March 2014. Assessment activities included the collection of soil and groundwater samples to evaluate the extent of contamination identified in the previous assessments. Arsenic, chromium VI, and several poly-aromatic hydrocarbons (PAHs) were detected above the commercial/industrial Inactive Hazardous Sites Branch’s Preliminary Soil Remediation Goals (PSRGs). The results are summarized in Exhibit C of the Brownfields Agreement (Appendix B). 3.0 PROPOSED DEVELOPMENT The redevelopment is anticipated to include an office tower with ground floor retail along South Tryon Street, a hotel along Stonewall Street, a courtyard at the corner of Tryon and Stonewall Streets, a multi-level parking deck across the balance of the site, and potentially multi-family residential (See Figure 3). 4.0 OBJECTIVE OF THE WORKPLAN The objective of the work plan was to determine if the previously detected tetrachloroethylene (PCE) in the groundwater is creating a vapor intrusion concern for those areas of the future site development that will be built slab on grade and to determine if the soil which has previously not been analyzed and will be excavated as part of the future site development is impacted with volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), and/or RCRA metals. The soil gas and soil sampling was conducted in general accordance with the North Carolina Division of Waste Management’s (NCDWM) Vapor Intrusion Guidance (April 2014) and the NCDWM Inactive Hazardous Site Program’s Guidelines for Assessment and Cleanup (October 2015). The work plan was approved by the Brownfields’ Manager on December 8, 2017. Soil and Soil Gas Sampling Report Former Goodyear Service Center Brownfields Project No. 17038-13-060 ECS Project No. 49-5350 May 17, 2018 3 5.0 SAMPLE COLLECTION 5.1 Soil Gas – October 2017 Sample Event Two portions of the site are proposed to have slab on grade buildings. The proposed slabs are anticipated to be close to the existing grade. Therefore, on October 15, 2017, ECS collected soil gas samples from four locations within the proposed footprint of each space. Four exterior soil gas samples were collected from a depth of 5 feet below grade on the northwest portion of the site where the office tower/retail will be located. One sub-slab soil gas sample was collected from within the current structure on the southeast portion of the site along with three exterior soil gas samples where the hotel is proposed to be located. The approximate locations of the samples are shown on Figure 4. In the approved work plan, ECS proposed using probe material and Summa canisters supplied from H&P Mobile Laboratories (H&P); however, H&P was not able to provide the materials in a timely manner, so ECS used in-house sampling materials and ordered the Summa canisters from Con-Test Analytical Laboratory. The borings for the exterior soil gas samples were created by driving a 2-inch O.D direct push sampler to a depth of 5 feet below the ground surface (bgs) on October 14, 2017. The soil collected in the macro core sampler was screened in the field with a photo-ionization detector (PID). Once the boring reached termination depth of 5 feet, a soil gas probe consisting of a five foot section of decontaminated ¼ O.D. stainless steel tube and stainless steel Swag-Lok fittings and valve was lowered into the boring. Approximately one foot of clean coarse sand was placed around the base of the probe. A seal consisting of three feet of bentonite powder was hydrated with distilled water. The soil gas probe was allowed to stabilize for a minimum of four hours before the soil gas sample was collected. The interior sub-slab vapor sample was collected by drilling a 3/8-inch diameter hole through the concrete slab of the current onsite structure and installing a soil gas probe consisting of dedicated ¼ O.D. polyethylene tubing and stainless Swag-Lok fittings and valve through the slab and approximately 2 inches into the under lying gravel stone base. Sand filled the boring to approximately two inches above the end of the tubing and the remainder of the boring was filled with bentonite powder and hydrated. A dedicated syringe was used at each sample location and connected to the tubing to purge the tubing. Three volumes of the tubing were purged prior to sample collection. Following purging, the tubing was connected to a 400 ml Summa canister, which was used to collect the sample. The Summa canister was fitted with a flow regulator. The flow rate for both purging and sample collection was 0.2 liters per minute. The pressure in the canister was recorded before and after sample collection. The purge volume, sample collection time, shut-in test results, and canister vacuum readings prior to and after collection are summarized on the Soil Gas Field Sampling Form, included in Appendix F. The probes were removed and the holes filled cement grout following sample collection. Soil and Soil Gas Sampling Report Former Goodyear Service Center Brownfields Project No. 17038-13-060 ECS Project No. 49-5350 May 17, 2018 4 Leak Detection Prior to collecting the soil and sub-slab vapor samples, laboratory grade helium gas was used as a quality assurance control measure to confirm the integrity of the probe seal at each sample location. A plastic cylinder (approximately 1.75 quarts) was placed and sealed over the sampling point and purged with laboratory grade helium. The probe point tubing and tracer gas tubing was placed through the cylinder wall via rubber grommets. The cylinder was placed on a 4-inch rubber gasket and held securely to the slab with a heavy weight. During the purging stage, the cylinder was flooded with laboratory grade helium via the hose placed through the cylinder wall. A Model MGD-2002 Multi-Gas Leak detector or similar was connected to the probe tube and the air stream being purged was measured for helium. A helium concentration of less than five percent helium was considered acceptable. If concentrations greater than five percent helium were measured, the probe tube seal was reseated and the leak detection process was repeated. The results of the helium field check are summarized on the Soil Gas Field Sampling Form included in Appendix F. Sample Analysis Following sample collection, the canisters were labeled and maintained under chain-of-custody protocol until delivered to Con-Test Analytical Laboratory in East Longmeadow, Massachusetts. A Chain-of-Custody document was utilized throughout the collection and transportation of the samples. Each sample was analyzed for the full list of VOCs using EPA Method TO-15. The results were reported below risk screening levels and J flags were be reported. Quality Control One duplicate sample (DUP) of sample SG-6 was collected and analyzed for the same compounds using EPA Method TO-15. 5.2 Soil Gas – January 2018 Sample Event Following review of the initial results, the Brownfields Project Manager requested additional soil gas samples be collected along the South Tryon Street portion of the site (replicate samples SG-1R through SG-4R). On January 30, 2018, ECS collected samples from four locations within the proposed footprint of the office building located along South Tryon Street. The approximate locations of the samples are shown on Figure 4. Per the approved work plan, ECS used probe material and Summa canisters supplied from H&P Mobile Laboratories (H&P). The borings for the exterior soil gas samples were advanced using a decontaminated 2-inch O.D. hand auger to a depth of 5 feet below the ground surface (bgs). The soil collected from the hand auger was screened in the field with a photo-ionization detector (PID). Once the boring reached termination depth, a sample probe consisting of dedicated Nylafow tubing and air stone was lowered into the boring. A seal consisting of three feet of bentonite powder was hydrated with distilled water. The soil gas probe was allowed to stabilize for a minimum of 24 hours before the soil gas sample was collected. A dedicated syringe was used at each sample location and connected to the tubing to purge the tubing. Three volumes of the tubing were purged prior to sample collection. Following purging, Soil and Soil Gas Sampling Report Former Goodyear Service Center Brownfields Project No. 17038-13-060 ECS Project No. 49-5350 May 17, 2018 5 the tubing was connected to a 1 liter Summa canister, which was used to collect the sample. The Summa canister was fitted with a flow regulator. The flow rate for both purging and sample collection was 0.2 liters per minute. The pressure in the canister was recorded before and after sample collection. The purge volume, sample collection time, shut-in test results, and canister vacuum readings prior to and after collection are summarized on the Soil Gas Field Sampling Form, included in Appendix F. On the day of the sampling, the weather was clear and temperature was in the mid-40s F. The probes were removed and the holes filled with cement grout following sample collection. Leak Detection Prior to collecting the exterior soil gas samples, laboratory grade helium gas was used as a quality assurance control measure to confirm the integrity of the probe seal at each sample location. A plastic cylinder (approximately 1.75 quarts) was placed and sealed over the sampling point and purged with laboratory grade helium. The probe point tubing and tracer gas tubing was placed through the cylinder wall via rubber grommets. The cylinder was placed on a 4-inch rubber gasket and held securely to the slab with a heavy weight. During the purging stage, the cylinder was flooded with laboratory grade helium via the hose placed through the cylinder wall. A Model MGD-2002 Multi-Gas Leak detector or similar was connected to the probe tube and the air stream being purged was measured for helium. A helium concentration of less than five percent helium was considered acceptable. If concentrations greater than five percent helium were measured, the probe tube seal was reseated and the leak detection process was repeated. The results of the helium field check are summarized on the Soil Gas Field Sampling Form included in Appendix F Sample Analysis Following sample collection, the canisters were labeled and maintained under chain-of-custody until delivered to H&P Mobile Geochemistry Inc. in Carlsbad, California. A Chain-of-Custody document was utilized throughout the collection and transportation of the samples. Each sample was analyzed for the full list of VOCs using EPA Method TO-15. The results were reported below risk screening levels and J flags were be reported. Quality Control One duplicate sample (DUP-R) of sample SG-1R was collected and analyzed for the same compounds using EPA Method TO-15. 5.3 Soil Samples ECS proposed collecting soil samples in the areas of future redevelopment/soil disturbance where samples have not previously been collected (See Figure 5 redline area). The anticipated depth to top of partially weathered rock; i.e. residuum, was 15 to 20 feet. The accessible areas of the site were separated into seven sections and four borings were advanced in each section. Twenty-eight (28) soil borings were advanced to a depth of 15 to 17 feet or direct-push refusal/top of partially weathered rock. Samples were to be collected from shallow depths Soil and Soil Gas Sampling Report Former Goodyear Service Center Brownfields Project No. 17038-13-060 ECS Project No. 49-5350 May 17, 2018 6 (approximately 5 feet deep) and deeper depths in each boring (approximately 10 to 15 feet). As such, ECS expected to collect up to 56 grab soil samples for analysis of VOCs, two samples from each boring, and up to fourteen (14) composite samples for SVOCs and total RCRA metals by compositing the shallow and deep soil samples from each boring in each of the seven quadrants. On October 14 and 15, 2017, ECS contracted with a North Carolina licensed drilling contractor to drill the soil borings using direct push technology. The soil samples were classified in the field by an ECS professional and screened for volatile organic vapors using a PID. The work plan proposed collecting samples from a shallow depth (5 feet) and a deeper depth (between 10 and 15 feet) in each boring. However, the direct push rig encountered probe refusal at a depth of 5 feet in Area 4, so the samples were only collected from the bottom of the boring. The deeper samples varied across the site, ranging in depths between 9 and 17 feet below grade. As such, 48 grab samples were collected and analyzed for VOCs using EPA Method 8260. Thirteen (13) composite samples were analyzed for SVOCs using EPA Method 8270 and total RCRA metals by EPA Methods 6010/7470/7471. Two soil samples were also collected from the Goodyear portion of the site for disposal soil profiling purposes (GP-1 and GP-2). The samples were analyzed for total petroleum hydrocarbons using EPA Method 8045. The locations of the boring are shown on Figure 4. Quality Control One duplicate sample (SB-DUP) of sample SB2-2S was collected and analyzed for the same compounds. Once the samples were collected, the drilling contractor properly abandoned the borings. 6.0 RESULTS 6.1 Soil Gas Analysis – October 2017 Sample Event On the day of the sampling, the weather was clear and temperature was in the mid to upper 50s. The results of the helium field check did not detect helium above 1 percent in the samples. The shut in test did not detect breaches in the sample train, the PID did not detect organic vapors above background, and there was no visual evidence of staining. Though eight of the canister vacuums read zero in the field, the lab measured vacuums upon arrival. One of the canisters (SG-1) still had vacuum upon sample completion, but read zero upon receipt by the lab. This sample is considered invalid because it was possible contaminants were introduced into the sample in transit to the laboratory. The results are summarized on the Soil Gas Sampling Form, included in Appendix F. Laboratory analysis of the eight soil gas samples and the duplicate (DUP) sample detected tetrachloroethene (PCE) at concentrations ranging from 560 ug/m3 (SG-7) to 34,000 ug/m3 (DUP), which is above the Residential Vapor Intrusion Screening Level (VISL) of 278 ug/m3. PCE was detected in the soil gas samples collected from SG-2, SG-6, and DUP at concentrations above the Industrial VISL of 3,500 ug/m3. Trichloroethylene (TCE) was detected in the samples collected from SG-1 through SG-6, SG-8, and DUP at concentrations ranging Soil and Soil Gas Sampling Report Former Goodyear Service Center Brownfields Project No. 17038-13-060 ECS Project No. 49-5350 May 17, 2018 7 from 18 ug/m3 (SG-1) to 350 ug/m3 (DUP) which is above the Residential VISL of 13.9 ug/m3. TCE was detected in the samples collected from SG-6 and DUP at concentrations above the Industrial VISL of 175 ug/m3. Ethyl Acetate was detected in the sample collected from SG-8 at a concentration of 1,600 ug/m3, which is above the Residential VISL of 487 ug/m3 but below the Industrial VISL of 6,130 ug/m3. Various other VOCs were detected above the laboratory reporting limits and detection limits in the samples, but at concentrations below their respective Residential VISLs. Quality Control One duplicate sample (DUP) was collected from SG-6 and analyzed for the same compounds using EPA Method TO-15. The compounds detected in the duplicate sample were similar to those detected in SG-6 and at similar concentrations. The results are summarized in Table 1 and the laboratory report is included as Appendix C. 6.1 Soil Gas Analysis - January 2018 Sample Event On the day of the sampling, the weather was clear and temperature was in the mid-40s F. The results of the helium field check did not detect helium above one percent in the samples. The shut in test did not detect breaches in the sample train. The PID did not detect organic vapors above background and there was no visual evidence of staining. Each of the canisters still had vacuum and arrived at the laboratory under similar vacuum indicating no loss of vacuum in transit. The results are summarized on the Soil Gas Sampling Form, included in Appendix F. Laboratory analysis of the four soil gas samples (SG-1R through SG-4R) detected various VOCs above the laboratory reporting limits and detection limits in the samples, but at concentrations below their respective Residential VISLs. The reporting limit for hexachlorobutadiene is above the Residential VISL, but below the Non-residential VISL. Quality Control One duplicate sample (DUP-R) was collected from SG-1R and analyzed for the same compounds using EPA Method TO-15. The compounds detected in the duplicate sample were similar to those detected in SG-1R and at similar concentrations. The results are summarized in Table 1 and the laboratory report is included as Appendix C. Soil and Soil Gas Sampling Report Former Goodyear Service Center Brownfields Project No. 17038-13-060 ECS Project No. 49-5350 May 17, 2018 8 Risk Calculators The North Carolina Department of Environmental Quality Risk Calculator (August 2016) was used on the October 2017 soil gas results from each soil gas sample location (the duplicate sample (DUP) results were used instead of the SG-6 results, as they were generally a higher concentration and therefore more conservative). Each constituent was placed in the calculator (J values were put in as the estimated concentration). The vapor intrusion calculator was run for resident and non-resident worker at each location. The Brownfields Project Manager also ran a combined sample scenario where the data from the four samples collected under each proposed building was included together in the risk calculator. The calculators determined the vapor intrusion risk was exceeded for a resident at each of the sample locations in the area of the proposed hotel except SG-7. Both the residence and non- resident worker vapor intrusion risk was exceeded a SG-6/DUP. The combined risk calculator also determined the risk was exceeded for the proposed hotel. The remaining samples did not exceed non-resident worker vapor risk nor did the combined risk calculator. The Summary of Risk Assessment Output sheets for each location and the combined buildings are included in Appendix D. Risk calculators were not used with respect to the soil gas results from the January 2018 sampling event, since no samples collected demonstrated soil gas exceeding residential concentrations. 6.2 Soil Sample Analysis Laboratory analysis of the shallow and deep soil samples did not detect VOCs at concentrations above the laboratory reporting limit. Laboratory analysis of the composite samples SB4-S, SB5-S, SB6-S, and SB7-S detected benzo(a)pyrene at concentrations ranging from an estimated concentration of 0.14 mg/kg (SB7- S) to 0.67 mg/kg (SB6-S) which are above the Residential Use Health-Based PSRG, but below the Industrial Health-Based PSRG of 2.1 mg/kg. Laboratory analysis of 12 of the 13 composite samples detected arsenic at concentrations above the Residential Use Health-Based PSRG of 0.68 mg/kg. Arsenic was detected in SB4-S at a concentration of 30 mg/kg, which is above the Industrial Health-Based PSRG of 3.0 mg/kg. The remaining samples likely reflect naturally occurring concentrations of arsenic. Various other metals and SVOCs were detected at concentrations above the laboratory reporting limit but below the Residential Health-based PSRGs. The TPH analysis detected diesel range TPH above the NCDEQ’s Station Action Level of 100 ppm. A summary of the soil sample analytical results in included as Table 2 and the laboratory report is included as Appendix E. Soil and Soil Gas Sampling Report Former Goodyear Service Center Brownfields Project No. 17038-13-060 ECS Project No. 49-5350 May 17, 2018 9 7.0 CONCLUSIONS Based on the results of the soil and soil gas assessment of the site, ECS has the following conclusion:  The soil on the site needs to be handled and managed/disposed/reused in accordance with the approved Environmental Management Plan (EMP).  Soil gas concentrations collected in the samples within the proposed hotel footprint on October 15, 2017 documented exceedances of screening levels for residential and non- resident worker risks. Soil gas concentrations collected in the samples collected on January 31, 2018 did not exceed residential screening levels. The observed results in both events are consistent with levels found throughout Uptown Charlotte.  Based on DWM’s Vapor Intrusion Guidance, vapor mitigation is not necessary under the retail/office tower development proposed for the South Tryon Street portion of the redevelopment. Vapor intrusion risk calculators indicate that a vapor mitigation system will be needed under the hotel development proposed for the Stonewall Street portion of the site. FIGURES FIGURE 1 SITE LOCATION MAP FORMER GOODYEAR SERVICE CENTER BROWNFIELDS PROJECT No. 17038-13-060 CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA ECS PROJECT NO. 49-5350 SOURCE: USGS TOPOGRAPHIC MAP: CHARLOTTE EAST, DATED 1967 PHOTOREVISED 1988 NORTH CAROLINA QUADRANGLE SCALE: 1” = 2,000’ SITE LEGEND 1 – Former Charlotte Observer 2 – Duke Energy Building 3 – Harvey B. Gant Building 4 – Charlotte Convention Center 5 – Westin Charlotte Hotel 6 – JDM Building – Multi-Tenant Office 7 – Interstate 277 – Historical Gasoline Station Based on Sanborns – Historical Auto Dealership Based on Sanborns SOURCE: GOOGLE EARTH 2012 AERIAL PHOTOGRAPH (VIA THE INTERNET) SCALE AS SHOWN FIGURE 2 SITE MAP FORMER GOODYEAR SERVICE CENTER BROWNFIELDS PROJECT No. 17038-13-060 CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA ECS PROJECT NO. 49-5350 1 6 5 4 3 2 7 SOURCE: MECKLENBURG COUNTY GIS (POLARIS) SCALE AS SHOWN FIGURE 3 PRELIMINARY SITE DEVELOPMENT PLAN FORMER GOODYEAR SERVICE CENTER BROWNFIELDS PROJECT No. 17038-13-060 CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA ECS PROJECT NO. 49-5350 MULTI LEVEL BELOW GROUND PARKING – EXCAVATION AREA (RED OUTLINE) PROPOSED SLAB-ON-GRADE OFFICE BUILDING WITH GROUND FLOOR RETAIL (BLACK OUTLINE) HOTEL PROPOSED SLAB- ON-GRADE (BLUE OUTLINE) COURTYARD SOURCE: MECKLENBURG COUNTY GIS (POLARIS) SCALE AS SHOWN FIGURE 4 PRELIMINARY SITE DEVELOPMENT PLAN WITH SAMPLE LOCATIONS FORMER GOODYEAR SERVICE CENTER BROWNFIELDS PROJECT No. 17038-13-060 CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA ECS PROJECT NO. 49-5350 Soil Sampling Area Soil Sampling Location Soil-Gas Sampling Location Sub-Slab Vapor Sampling Location Yellow border represents slab on grade Blue border represents area to excavated 1 2 3 4 5 6 7 SB4-S SB6-S/D SB7-S/D SB1-S/D SB3-S/D SB5-S/D SB2-S/D SG-1/1R SG-2/2R SG-3/3R SG-4/4R SG-5 SG-6 SG-8 SG-7 GP-1 GP-2 TABLES TABLE 1: SUMMARY OF SOIL GAS ANALYTICAL RESULTS TRYON PLACE, TRYON AND STONEWALL STREETS Parameter Sample ID SG-1 SG-2 SG-3 SG-4 SG-5 SG-6 SG-7 SG-8 DUP SG-1R SG-2R SG-3R SG-4R DUP-R Collection Date Acetone 45 J 50 22 J 42 J 81 < 52 24 J < 53 51 J 270 130 30 120 <24 220,000 2,700,000 Benzene 1.3 J 2.9 < 2.0 7.2 3.1 12 < 2.1 15 1.9 J 45 3.5 2.6 J 2.5 J 44 120 1,600 2-Butone (IMEK)10 J 13 J 4.0 J 8.9 J 19 J 11 J < 5.1 45 J 10 J 33 8.2 J 3.1 J 7.9 J 33 35,000 440,000 Carbon Disulfide 4.1 J 1.6 J < 20 6.5 J 15 J 120 < 20 < 17 4.7 J 370 2.6 J 10 4.0 J 340 4,900 61,000 Chloroform <3.1 <2.6 <3.1 <2.6 <3.4 <2.7 <3.1 <2.7 <3.1 <4.9 <4.9 1.3 J <4.9 1.3 J 41 530 Chloromethane < 2.6 < 2.2 1.2 J 1.1 J 3.9 8.2 < 2.7 1.4 J < 2.7 2.5 0.8 J 1.4 J 2.9 11 630 7,900 Cyclohexane < 2.2 < 1.8 < 2.2 71 < 2.4 26 < 2.2 8.1 < 2.2 68 <17 <17 <17 65 42,000 530,000 Dichlorodifluoromethane (F12)3.0 J 2.2 J < 3.1 2.4 J 2.6 J 2.3 J 2.5 J 2.5 J 3.1 J 8.6 2.2 J 2.7 J 2.1 J 7.1 700 8,800 cis-1,2-Dichloroethylene 13 42 13 10 20 120 6.2 22 240 <4.0 <4.0 <4.0 <4.0 <4.0 NS NS trans-1,2-Dichloroethylene < 2.5 < 2.1 < 2.5 < 2.1 < 2.8 1.9 J < 2.6 < 2.2 3.4 <8.0 <8.0 <8.0 <8.0 <8.0 NS NS Ethanol < 48 < 40 < 48 21 J 44 J < 41 < 49 110 < 49 40 95 26 92 39 NS NS Ethyl acetate < 2.3 < 1.9 < 2.3 < 1.9 2.7 < 2.0 5.1 1,600 < 2.3 <18 <18 <18 5.4 J <18 490 6,100 Ethylbenzene < 2.8 46 3.6 4.2 < 3.0 4.3 < 2.8 3.8 < 2.8 20 QL-1H 2.4 QL-1H J 2.9 QL-1H J 3.0 QL-1H J 19 QL-1H 370 4,900 4-Ethyltoluene < 2.0 2.0 J < 3.1 1.9 J < 3.4 < 2.7 < 32.< 2.7 < 3.2 <5.0 2.3 J <5.0 <5.0 <5.0 NS NS Heptane 1.9 J 1.9 J < 2.6 69 3.6 29 2.9 3.6 2.4 J 41 5.1 11 8.0 39 NS NS Hexane 4.3 J 4.5 J < 90 47 J 7.7 J 49 4.3 J 25 J 4.9 J 130 4.6 14 1.6 J 120 4,900 61,000 Hexachlorobutadiene < 6.8 < 5.6 < 6.8 < 5.7 < 7.5 4.0 J,Z-01 < 6.9 < 5.9 < 6.9 <54 <54 <54 <54 <54 43 560 Isopropanol 2.2 J, Z-01 2.5 J, Z-01 < 62 Z-01 3.8 J, Z-01 5.6 J, Z-01 2.2 J, Z-01 2.5 J, Z-01 38 J, Z-01 2.8 J, Z-01 <25 13 J 4.8 J 25 J 8.7 J 1,400 18,000 Methylene chloride < 22 < 18 < 22 2.8 J 4.5 J 2.8 J 3.4 J 120 < 22 1.2 J <3.5 1.1 J 1.5 J 1.2 J 4,200 53,000 4-Methyl-2-pentanone (MIBK)< 2.6 < 2.2 < 2.6 < 2.2 < 2.9 < 2.2 < 2.6 8 < 2.8 5.4 J <8.3 <8.3 <8.3 6.9 J 21,000 260,000 Naphthalene 7.3 < 2.8 < 3.3 < 2.8 < 3.7 < 2.9 < 3.4 < 2.9 6.8 <5.3 <5.3 <5.3 4.5 J <5.3 21 260 Propene 31 J 30 J 6.6 J 66 25 J 290 9.5 J < 38 30 J 3900 13 31 20 4300 NS NS Styrene < 2.7 L-03 3.0 L-03 < 2.7 L- 03 < 2.3 L- 03 2.2 L- 03 3.0 L- 03 2.7 L- 03 5.6 L- 03 < 2.7 L- 03 5.0 <4.3 <4.3 <4.3 5.3 7,000 88,000 Tetrachloroethylene 1,300 4,000 1,300 1,300 2,000 30,000 560 2,400 34,000 12 2.4 J <6.9 45 11 280 3,500 Toluene 3.5 7.4 2.6 4.6 6.3 9.8 2.2 J 140 3.4 110 50 69 110 110 35,000 440,000 Trichloroethylene 18 63 19 35 30 210 9.2 58 350 <5.5 <5.5 <5.5 3.8 J <5.5 14.0 180 1,1,1-Trichloroethane <3.5 <2.9 <3.5 <2.9 <3.8 <3.0 <3.5 <3.0 <3.5 <5.5 <5.5 <5.5 3.2 J <5.5 35,000 440,000 Trichlorofluoromethane (F11)<14 <12 <14 <12 <16 <12 <14 <12 <14 1.5 J <5.6 1.7 J 1.2 J 1.4 J NS NS 1,2,4-Trimethylbenzene < 3.1 3.4 < 3.1 < 2.6 < 3.4 3.8 < 3.2 2.0 J 3.3 <5.0 <5.0 3.2 J 4.3 J <5.0 420 5,300 1,3,5-Trimethylbenzene < 3.1 4.2 < 3.1 < 2.6 < 3.4 11 <3.2 2.1 J 14 <5.0 <5.0 <5.0 1.8 J <5.0 420 5,300 Vinyl acetate < 45 1.8 J < 45 < 38 < 49 < 39 < 45 < 39 < 45 <3.6 <3.6 <3.6 <3.6 <3.6 1,400 18,000 Vinyl chloride <1.6 <1.3 <1.6 <1.4 <1.8 3.0 <1.6 <1.4 5.8 1.6 J <2.6 <2.6 <2.6 1.8 J 56 2,800 m,p-Xylenes < 5.5 190 15 < 4.6 4.3 J 11 < 5.6 9.8 < 5.6 12 11 7.8 J 14 13 700 8,800 o-Xylenes < 2.8 61 5 2.3 J < 3.0 4.6 < 2.8 8.2 3.0 7.6 4.5 2.6 J 4.0 J 7.2 700 8,800 Notes: Comparison Criteria = North Carolina DWM Soil Gas Screening Level (SGSL) from IHSB Levels DWM Vapor Intrusion Screening dated February 2018 Results presented in micrograms per cubic meter (ug/m3) Bold indicates a detection above the Residential SGSL Italics indicates a detection above the Non-Residential SGSL Z-01 = Compound fails the method requirement of 70-130% recovery for the LCS. Is classified by the lab as a difficult compound and passes the in house limits of 50-150%. L-03 = Laboratory fortified blank/laboratory control sample recovery is outside of control limits. Reported value for this compound is likely to be biased on the low side. QL-1H = The LCS and/or LCSD recoveries fell above the established control specifications for this analyte. Any result for this compound is qualified and should be considered biased high.J =Detected but below the Reporting Limit (lowest calibration standard); therefore, result is an estimated concentration SGSL = Soil Gas Screening LevelDUP collected on 10/15/17 = Duplicate of SG-6 DUPR collected on 1/31/18 = Duplicate of SG-1R ResidentialSGSL Non-ResidentialSGSL Target Volatile Organic Compounds by TO-15 COMPARISON CRITERIAANALYTICAL RESULTS 1/31/1810/15/17 TABLE 2: SUMMARY OF SOIL ANALYTICAL RESULTS - VOCS Quadrants 1 through 4 Tryon PlaceEast Stonewall Street, Charlotte, North Carolina Parameter Sample ID SB1-1S SB1-1D SB1-2S SB1-2D SB1-3S SB1-3D SB1-4S SB2-1S SB2-2S SB-Dup SB2-3S SB2-3D SB2-4S SB2-4D SB3-1S SB3-1D SB3-2S SB3-2D SB3-3S SB3-3D SB3-4S SB3-4D SB4-1S SB4-2S SB4-3S SB4-4S Collection Depth (feet bgs)5 12 5 14 5 11 5 5 5 5 5 9 5 14 5 13 5 14 5 15 5 15 5 5 5 5 Collection Date 10/15/17 10/14/17 Volatile Organic Compounds Acetone 0.052 <0.040 <0.038 <0.041 <0.039 <0.042 <0.0037 0.024 J 0.13 0.029J 0.029J <0.037 0.026 J <0.047 0.052 <0.044 0.049 <0.035 0.11 <0.036 0.08 <0.040 <0.040 0.075 0.11 <0.038 1,200 10,0000 Benzene <0.0027 <0.0024 <0.0023 <0.0025 <0.0023 <0.0025 <0.0022 <0.0027 <0.0026 <0.0024 <0.0025 <0.0022 <0.0021 <0.0028 <0.0021 <0.0026 <0.0028 <0.0021 <0.0028 <0.0022 <0.0022 <0.0024 <0.0024 0.0019 J <0.0028 <0.0023 1.2 5.4 Toluene <0.0044 <0.0040 <0.0038 <0.0041 <0.0039 <0.0042 <0.0037 <0.0045 <0.0043 <0.0041 <0.0042 <0.0037 <0.0034 <0.0047 <0.0035 <0.0044 <0.0046 <0.0035 <0.0046 <0.0036 <0.0037 <0.0040 <0.0040 0.0032 J <0.0046 <0.0038 820 820 2-Butanone <0.089 <0.080 <0.077 <0.082 <0.078 <0.084 <0.075 <0.089 <0.087 <0.081 <0.085 <0.075 <0.069 <0.094 <0.071 <0.087 <0.093 <0.070 <0.092 <0.072 <0.074 <0.079 <0.081 <0.088 <0.092 <0.076 5,500 28,000 1,2,4-Trimethylbenzene <0.0044 <0.0040 <0.0038 <0.0041 <0.0039 <0.0042 <0.0037 <0.0045 <0.0043 <0.0041 <0.0042 <0.0037 <0.0034 <0.0047 <0.0035 <0.0044 <0.0046 <0.0035 <0.0046 <0.0036 <0.0037 <0.0040 <0.0040 <0.0044 <0.0046 <0.0038 63 220 1,3,5-Trimethylbenzene <0.0044 <0.0040 <0.0038 <0.0041 <0.0039 <0.0042 <0.0037 <0.0045 <0.0043 <0.0041 <0.0042 <0.0037 <0.0034 <0.0047 <0.0035 <0.0044 <0.0046 <0.0035 <0.0046 <0.0036 <0.0037 <0.0040 <0.0040 <0.0044 <0.0046 <0.0038 56 180 4-Isopropyltoluene <0.0044 <0.0040 <0.0038 <0.0041 <0.0039 <0.0042 <0.0037 <0.0045 <0.0043 <0.0041 <0.0042 <0.0037 <0.0034 <0.0047 <0.0035 <0.0044 <0.0046 <0.0035 <0.0046 <0.0036 <0.0037 <0.0040 <0.0040 <0.0044 <0.0046 <0.0038 25 NS m,p-Xylenes <0.0089 <0.0080 <0.0077 <0.0082 <0.0078 <0.0084 <0.0075 <0.0089 <0.0087 <0.0081 <0.0085 <0.0075 <0.0069 <0.0094 <0.0071 <0.0087 <0.0093 <0.0070 <0.0092 <0.0072 <0.0074 <0.0079 <0.0081 <0.0088 <0.0092 <0.0076 120 390 Methyl isobutyl ketone <0.044 <0.040 <0.038 <0.041 <0.039 <0.042 <0.037 <0.045 <0.043 <0.041 <0.042 <0.037 <0.034 <0.047 <0.035 <0.044 <0.046 <0.035 <0.046 <0.036 <0.037 <0.040 <0.040 <0.044 <0.046 <0.038 3,400 3,400 Naphthalene <0.0089 <0.0080 <0.0077 <0.0082 <0.0078 <0.0084 <0.0075 <0.0089 <0.0087 <0.0081 <0.0085 <0.0075 <0.0069 <0.0094 <0.0071 <0.0087 <0.0093 <0.0070 <0.0092 <0.0072 <0.0074 <0.0079 <0.0081 <0.0088 <0.0092 <0.0076 4.1 18 n-Butylbenzene <0.0044 <0.0040 <0.0038 <0.0041 <0.0039 <0.0042 <0.0037 <0.0045 <0.0043 <0.0041 <0.0042 <0.0037 <0.0034 <0.0047 <0.0035 <0.0044 <0.0046 <0.0035 <0.0046 <0.0036 <0.0037 <0.0040 <0.0040 <0.0044 <0.0046 <0.0038 110 110 n-Propylbenzene <0.0044 <0.0040 <0.0038 <0.0041 <0.0039 <0.0042 <0.0037 <0.0045 <0.0043 <0.0041 <0.0042 <0.0037 <0.0034 <0.0047 <0.0035 <0.0044 <0.0046 <0.0035 <0.0046 <0.0036 <0.0037 <0.0040 <0.0040 <0.0044 <0.0046 <0.0038 260 260 o-xylene <0.0044 <0.0040 <0.0038 <0.0041 <0.0039 <0.0042 <0.0037 <0.0045 <0.0043 <0.0041 <0.0042 <0.0037 <0.0034 <0.0047 <0.0035 <0.0044 <0.0046 <0.0035 <0.0046 <0.0036 <0.0037 <0.0040 <0.0040 <0.0044 <0.0046 <0.0038 140 430 Xylene, total <0.013 <0.012 <0.012 <0.012 <0.012 <0.013 <0.011 <0.013 <0.013 <0.012 <0.013 <0.011 <0.010 <0.014 <0.011 <0.013 <0.014 <0.011 <0.014 <0.011 <0.011 <0.012 <0.012 <0.013 <0.014 <0.011 120 260 sec-Butylbenzene <0.0044 <0.0040 <0.0038 <0.0041 <0.0039 <0.0042 <0.0037 <0.0045 <0.0043 <0.0041 <0.0042 <0.0037 <0.0034 <0.0047 <0.0035 <0.0044 <0.0046 <0.0035 <0.0046 <0.0036 <0.0037 <0.0040 <0.0040 <0.0044 <0.0046 <0.0038 150 150 Notes: Results presented in milligrams per kilogram (mg/kg), analogous to parts per million (ppm)Feet bgs = Feet below ground surface Bold denotes concentration exceeds the Residential PSRG (February 2018) J = Estimated concentration, below calibration range and above Method Detection LimitThe standard for trivalent chromium used for total chromium, as recent sampling determined that the chromium present was trivalent, not hexavalent. SB-Dup is a duplicate sample of SB2-2S Comparison CriteriaANALYTICAL RESULTS Unrestricted Use Health Base-Based PSRG Industrial Health-Based PSRG 1014/17 10/14/17 10/15/17 TABLE 2: SUMMARY OF SOIL ANALYTICAL RESULTS - VOCS Quadrants 1 through 4 Tryon Place East Stonewall Street, Charlotte, North Carolina Parameter Sample ID SB5-1S SB5-1D SB5-2S SB5-3S SB5-4S SB5-4D SB6-1S SB6-1D SB6-2S SB6-2D SB6-3S SB6-3D SB6-4S SB6-4D SB7-1S SB7-1D SB7-2S SB7-2D SB7-3S SB7-3D SB7-4S SB7-4D Collection Depth (feet bgs)5 9 5 5 5 11 5 14 5 13 5 11 5 17 5 14 5 10 5 15 5 14 Collection Date Volatile Organic Compounds Acetone 0.062 <0.049 <0.042 0.062 0.064 0.022 J 0.15 0.18 0.036 <0.043 0.16 0.022 J 0.11 <0.043 0.041 <0.040 0.020 J <0.055 0.012 J <0.039 0.11 <0.051 1,200 10,0000 Benzene <0.0026 <0.0030 <0.0025 <0.0027 <0.0024 <0.0026 <0.0026 <0.0023 <0.0021 <0.0026 0.0020 J <0.0026 0.0028 <0.0026 <0.0021 <0.0024 <0.0022 <0.0033 <0.0023 <0.0023 <0.0026 <0.0031 1.2 5.4 Toluene <0.0043 <0.0049 <0.0042 <0.0044 <0.0039 <0.0044 <0.0044 <0.0038 <0.0035 <0.0043 <0.0036 <0.0044 <0.0045 <0.0043 <0.0035 <0.0040 <0.0037 <0.0055 <0.0039 <0.0039 <0.0043 <0.0051 820 820 2-Butanone <0.086 <0.099 <0.084 <0.089 <0.079 <0.087 <0.088 <0.075 <0.089 <0.086 0.018 J <0.087 <0.090 <0.086 <0.070 <0.079 <0.073 <0.11 <0.078 <0.077 <0.086 <0.10 5,500 28,000 1,2,4-Trimethylbenzene <0.0043 <0.0049 <0.0042 <0.0044 <0.0039 <0.0044 <0.0044 0.010 A <0.0035 <0.0043 <0.0036 <0.0044 <0.0045 <0.0043 <0.0035 <0.0040 <0.0037 <0.0055 <0.0039 <0.0039 <0.0043 <0.0051 63 220 1,3,5-Trimethylbenzene <0.0043 <0.0049 <0.0042 <0.0044 <0.0039 <0.0044 <0.0044 0.0044 A <0.0035 <0.0043 <0.0036 <0.0044 <0.0045 <0.0043 <0.0035 <0.0040 <0.0037 <0.0055 <0.0039 <0.0039 <0.0043 <0.0051 56 180 4-Isopropyltoluene <0.0043 <0.0049 <0.0042 <0.0044 <0.0039 <0.0044 <0.0044 0.011 A <0.0035 <0.0043 <0.0036 <0.0044 <0.0045 <0.0043 <0.0035 <0.0040 <0.0037 <0.0055 <0.0039 <0.0039 <0.0043 <0.0051 25 NS m,p-Xylenes <0.0086 <0.0099 <0.0084 <0.0089 <0.0079 <0.0087 <0.0088 0.0018 A,J <0.0069 <0.0086 <0.0072 <0.0087 <0.0090 <0.0086 <0.0070 <0.0079 <0.0073 <0.011 <0.0078 <0.0077 <0.0086 <0.010 120 390 Methyl isobutyl ketone <0.043 <0.049 <0.042 <0.044 <0.039 <0.044 <0.044 0.0076 J <0.035 <0.043 <0.036 <0.044 <0.045 <0.043 <0.070 <0.040 <0.037 <0.055 <0.039 <0.039 <0.043 <0.051 3,400 3,400 Naphthalene <0.0086 <0.0099 <0.0084 <0.0089 <0.0079 <0.0087 <0.0088 0.0089 A <0.0069 <0.0086 <0.0072 <0.0087 <0.0090 <0.0086 <0.0070 <0.0079 <0.0073 <0.011 <0.0078 <0.0077 <0.0086 <0.010 4.1 18 n-Butylbenzene <0.0043 <0.0049 <0.0042 <0.0044 <0.0039 <0.0044 <0.0044 0.0065 A <0.0035 <0.0043 <0.0036 <0.0044 <0.0045 <0.0043 <0.0035 <0.0040 <0.0037 <0.0055 <0.0039 <0.0039 <0.0043 <0.0051 110 110 n-Propylbenzene <0.0043 <0.0049 <0.0042 <0.0044 <0.0039 <0.0044 <0.0044 0.0039 A <0.0035 <0.0043 <0.0036 <0.0044 <0.0045 <0.0043 <0.0035 <0.0040 <0.0037 <0.0055 <0.0039 <0.0039 <0.0043 <0.0051 260 260 o-xylene <0.0043 <0.0049 <0.0042 <0.0044 <0.0039 <0.0044 <0.0044 0.0030 A,J <0.0035 <0.0043 <0.0036 <0.0044 <0.0045 <0.0043 <0.0035 <0.0040 <0.0037 <0.0055 <0.0039 <0.0039 <0.0043 <0.0051 140 430 Xylene, total <0.013 <0.015 <0.013 <0.013 <0.012 <0.013 <0.013 0.0048 A,J <0.010 <0.013 <0.011 <0.013 <0.013 <0.013 <0.010 <0.012 <0.011 <0.017 <0.012 <0.012 <0.013 <0.015 120 260 sec-Butylbenzene <0.0043 <0.0049 <0.0042 <0.0044 <0.0039 <0.0044 <0.0044 0.0061 A <0.0035 <0.0043 <0.0036 <0.0044 <0.0045 <0.0043 <0.0035 <0.0040 <0.0037 <0.0055 <0.0039 <0.0039 <0.0043 <0.0051 150 150 Notes: Results presented in milligrams per kilogram (mg/kg), analogous to parts per million (ppm) Feet bgs = Feet below ground surface Bold denotes concentration exceeds the Residential PSRG February 2018) J = Estimated concentration, below calibration range and above Method Detection Limit A = Internal standard repsonse outside the QC limits. Analysis repeated without improvement. Reanalysis result reported.The standard for trivalent chromium used for total chromium, as recent sampling determined that the chromium present was trivalent, not hexavalent. 10/15/17 10/14/17 Unrestricted Use Health Base-Based PSRG Industrial Health- Based PSRG Comparison Criteria TABLE 2: SUMMARY OF SOIL ANALYTICAL RESULTS - VOCS Quadrants 1 through 4Tryon Place East Stonewall Street, Charlotte, North Carolina Parameter Sample ID SB1-S SB1-D SB2-S SB2-D SB3-S SB3-D SB4-S SB5-S SB5-D SB6-S SB6-D SB7-S SB7-D Collection Depth (feet bgs)5 11-14 5 9-14 5 13-15 5 5 9-11 5 11-17 5 10-15 Collection Date Total Metals Arsenic 0.58 1.30 1.10 0.71 2.70 1.40 30.00 1.50 1.10 4.60 1.60 5.50 2.80 0.68 3.0 Barium 27.00 36.00 46.00 370.00 53.00 40.00 110.00 66.00 62.00 200.00 51.00 55.00 56.00 3,100 47,000 Cadmium <0.29 <0.28 <0.30 <0.28 <0.29 <0.29 0.33 <0.29 <0.27 0.34 <0.28 0.37 <0.29 14 200 Chromium 28.00 10.00 39.00 130.00 20.00 200.00 21.00 31.00 31.00 46.00 14.00 24.00 63.00 23,000 350,000 Lead 9.00 6.70 8.90 3.10 33.00 4.90 82.00 9.80 4.00 180.00 6.10 61.00 7.30 400 800 Mercury <0.022 <0.021 <0.023 <0.021 0.18 <0.021 0.24 <0.023 <0.020 0.78 <0.023 0.27 <0.024 2.30 9.70 Selenium 0.57 0.61 1.20 0.75 0.88 0.62 1.20 1.10 0.73 0.64 0.93 1.30 0.94 78 1,200 Semivolatile Organic Compounds 1-Methylnaphthalene <0.38 <0.37 <0.40 <0.36 <0.38 <0.38 <0.36 <0.38 <0.35 0.13 J <0.37 <0.38 <0.38 18 73 2-Methylnaphthalene <0.38 <0.37 <0.40 <0.36 <0.38 <0.38 0.096 J <0.38 <0.35 0.16 J <0.37 <0.38 <0.38 48 600 Anthracene <0.38 <0.37 <0.40 <0.36 <0.38 <0.38 <0.36 <0.38 <0.35 0.11 J <0.37 <0.38 <0.38 3,600 45,000 Benz(a)anthracene <0.38 <0.37 <0.40 <0.36 <0.38 <0.38 0.25 J 0.13 J <0.35 0.55 <0.37 0.13 J <0.38 1.1 21 Benzo(a)pyrene <0.38 <0.37 <0.40 <0.36 0.11 J <0.38 0.31 J 0.15 J <0.35 0.67 <0.37 0.14 J <0.38 0.11 2.1 Benzo(b)fluoranthene <0.38 <0.37 <0.40 <0.36 0.17 J <0.38 0.44 0.24 J <0.35 0.88 <0.37 0.20 J <0.38 1.1 21 Benzo(k)fluoranthene <0.38 <0.37 <0.40 <0.36 ,0.37 <0.38 0.13 J <0.38 <0.35 0.26 J <0.37 <0.38 <0.38 11 210 Benzo(g,h,i)perylene <0.38 <0.37 <0.40 <0.36 0.096 J <0.38 <0.37 0.13 J <0.35 0.46 <0.37 <0.38 <0.38 NS NS Chrysene <0.38 <0.37 <0.40 <0.36 0.10 J <0.38 0.28 J 0.19 J <0.35 0.60 <0.37 0.16 J <0.38 110 2,100 Dibenzo(a,h)anthracene <0.38 <0.37 <0.40 <0.36 <0.38 <0.38 <0.36 <0.38 <0.35 0.11 J <0.37 <0.38 <0.38 0.11 2.1 Fluoranthene <0.38 <0.37 <0.40 <0.36 0.16 J <0.38 0.42 0.39 <0.35 0.98 <0.37 0.23 J <0.38 480 6,000 Indeo(1,2,3-cd)pyrene <0.38 <0.37 <0.40 <0.36 0.097 J <0.38 0.26J 0.13 J <0.35 <0.37 <0.37 0.099 J <0.38 1.1 21 Naphthalene <0.38 <0.37 <0.40 <0.36 <0.38 <0.38 <0.36 <0.38 <0.35 0.14J <0.37 <0.38 <0.38 4.1 18 Phenanthrene <0.38 <0.37 <0.40 <0.36 <0.38 <0.38 0.25 J 0.15 J <0.35 0.37 <0.37 <0.38 <0.38 NS NS Pyrene <0.38 <0.37 <0.40 <0.36 0.17 J <0.38 0.4 0.33 J <0.35 1.0 <0.37 0.22 J <0.38 360 4,500 Notes: Results presented in milligrams per kilogram (mg/kg), analogous to parts per million (ppm) Feet bgs = Feet below ground surfaceBold denotes concentration exceeds the residential PSRG (February 2018) Underline denotes concentration exceeds the residential and commercial PSRG J = Estimated concentration, below calibration range and above Method Detection Limit The standard for trivalent chromium used for total chromium, as recent sampling determined that the chromium present was trivalent, not hexavalent. Residential Use Health Base- Based PSRG Industrial Health- Based PSRG 10/15/17 Comparison Criteria APPENDIX A APPENDIX B 17038-13-060/Goodyear 2016-07-25 1 Exhibit C The most recent environmental sampling at the Property reported in the Environmental Reports occurred in August 2014.The following tables set forth, for contaminants present at the Property above unrestricted use standards or screening levels, the concentration found at each sample location, and the applicable standard or screening level. Screening levels and groundwater standards are shown for reference only and are not set forth as cleanup levels for purposes of this Agreement. GROUNDWATER Groundwater contaminants in micrograms per liter (the equivalent of parts per billion), the standards or screening levels for which are contained in Title 15A of the North Carolina Administrative Code, Subchapter 2L (2L), Rule .0202, (April 1 2013 version); or the 2L Groundwater Interim Maximum Allowable Concentrations (“IMACs”, October 1, 2010 version): Groundwater Contaminant Sample Location Date of Sampling Concentration Exceeding Screening Level (µg/L) 2L Standard (µg/L) Tetrachloroethylene TW-2 11/2/2013 3.4 0.7 Notes: 1. Screening limits displayed for non-carcinogens are for a hazard quotient equal to 0.2. Screening levels displayed for carcinogens are for a 1.0E-5 lifetime incremental cancer risk (LICR). SOIL Soil contaminants in milligrams per kilogram (the equivalent of parts per million), the screening levels for which are derived from the Preliminary Industrial Health- Based Soil Remediation Goals of the Inactive Hazardous Sites Branch of DEQ’s Superfund Section (April 2016 version): Soil Contaminant Sample Location Depth (ft) Date of Sampling Concentration Exceeding Screening Level (mg/kg) Industrial Screening Level1 (mg/kg) Arsenic SB2 4-8 04/29/2006 4.3 3 Arsenic SB3 8-12 04/29/2006 7.1 3 Arsenic GP-1* 8-10 10/26/2013 6.7 3 Arsenic GP-2* 17-18 10/26/2013 5.5 3 Arsenic GP-3* 13-14 10/26/2013 7.3 3 Arsenic GP-4* 12-13 10/26/2013 4.5 3 Arsenic GP-1 12 10/22/2013 4.4 3 Arsenic GP-5 8 10/22/2013 4.0 3 Arsenic GP-6 8 10/22/2013 11 3 17038-13-060/Goodyear 2016-07-25 2 Soil Contaminant Sample Location Depth (ft) Date of Sampling Concentration Exceeding Screening Level (mg/kg) Industrial Screening Level1 (mg/kg) Arsenic GP-7 16 10/22/2013 5.7 3 Arsenic GP-8 12 10/22/2013 3.7 3 Arsenic GP-10 8 10/22/2013 3.3 3 Arsenic GP-12 12 10/22/2013 3.2 3 Arsenic GP-13 8 10/22/2013 7.6 3 Arsenic GP-14 8 10/22/2013 4.3 3 Arsenic SB-01 2-4 03/13/2014 6.1 3 Arsenic SB-02 2-4 03/13/2014 5.75 3 Arsenic SB-03 2-4 03/13/2014 11.7 3 Arsenic SB-04 10-12 03/13/2014 6.04 3 Arsenic SB-05 10-12 03/13/2014 4.4 3 Arsenic SB-06 2-4 03/14/2014 3.75 3 Arsenic SB-07 2-4 03/13/2014 6.18 3 Arsenic SB-08 2-4 03/13/2014 7.39 3 Arsenic SB-09 2-4 03/13/2014 6.53 3 Arsenic SB-10 10-12 03/13/2014 4.28 3 Chromium VI GP-2 8 10/22/2013 6.87 6.3 Benzo(a)anthracene GP-6 8 10/22/2013 3.7 2.9 Benzo(a)anthracene GP-13 8 10/22/2013 5.0 2.9 Benzo(a)pyrene GP-6 8 10/22/2013 3.7 0.29 Benzo(a)pyrene GP-13 8 10/22/2013 5.6 0.29 Benzo(b)fluoranthene GP-6 8 10/22/2013 4.2 2.9 Benzo(b)fluoranthene GP-13 8 10/22/2013 6.4 2.9 Dibenzo(a,h)anthracene GP-6 8 10/22/2013 0.98 0.29 Dibenzo(a,h)anthracene GP-13 8 10/22/2013 0.97 0.29 Indeno(1,2,3-cd)pyrene GP-6 8 10/22/2013 3.1 2.9 Indeno(1,2,3-cd)pyrene GP-13 8 10/22/2013 4.8 2.9 1Screening levels displayed for non-carcinogens are for a hazard quotient equal to 0.2. Screening levels displayed for carcinogens are for a 1.0E-6 lifetime incremental cancer risk. *Boring locations on Goodyear Property installed by ECS Carolinas APPENDIX C 16 May 2018 Enclosed is the analytical report for the above referenced project. The data herein applies to samples as received by H&P Mobile Geochemistry, Inc. on 01-Feb-18 which were analyzed in accordance with the attached Chain of Custody record(s). The results for all sample analyses and required QA/QC analyses are presented in the following sections and summarized in the documents: •Sample Summary •Case Narrative (if applicable) •Sample Results •Quality Control Summary •Notes and Definitions / Appendix •Chain of Custody •Sampling Logs (if applicable) Unless otherwise noted, I certify that all analyses were performed and reviewed in compliance with our Quality Systems Manual and Standard Operating Procedures. This report shall not be reproduced, except in full, without the written approval of H&P Mobile Geochemistry, Inc. We at H&P Mobile Geochemistry, Inc. sincerely appreciate the opportunity to provide analytical services to you on this project. If you have any questions or concerns regarding this analytical report, please contact me at your convenience at 760-804-9678. Sincerely, Client Project: Tryon Place H&P Project: ECS020118-11 Rev 2 Charlotte, NC 28217 1812 Center Park Drive, Suite D ECS Southeast, LLP - Charlotte Mr. Chris Orrell Laboratory Director Janis La Roux Dear Mr. Chris Orrell: Quality. Accuracy. Experience.2470 Impala Drive, Carlsbad, CA 92010 & Field Office - Signal Hill, CA P 1.800.834.9888 / 760.804.9678 F 760.804.9159 W handpmg.com MobileGeochemistry Inc. H&P Mobile Geochemistry, Inc. is certified under the California ELAP and the National Environmental Laboratory Accreditation Conference (NELAC). H&P is approved as an Environmental Testing Laboratory and Mobile Laboratory in accordance with the DoD-ELAP Program and ISO/IEC 17025:2005 programs, accreditation number 69070 for EPA Method TO-15, H&P Method TO-15, EPA Method 8260B and H&P 8260SV. Page 1 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Sample ID Laboratory ID Matrix Date Sampled ANALYTICAL REPORT FOR SAMPLES Date Received SG-4R E802006-01 Vapor 31-Jan-18 01-Feb-18 SG-3R E802006-02 Vapor 31-Jan-18 01-Feb-18 SG-2R E802006-03 Vapor 31-Jan-18 01-Feb-18 SG-1R E802006-04 Vapor 31-Jan-18 01-Feb-18 Dup E802006-05 Vapor 31-Jan-18 01-Feb-18 Page 2 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-4R (E802006-01) Vapor Sampled: 31-Jan-18 Received: 01-Feb-18 EPA TO-1507-Feb-18 07-Feb-18ug/m3 EB807111Propene8.7ND0.7 """""Dichlorodifluoromethane (F12)J"5.01.22.1 """""Chloromethane "2.10.62.9 """"""Dichlorotetrafluoroethane (F114)7.1ND1.8 """"""Vinyl chloride 2.6ND1.0 """"""Bromomethane 16ND1.2 """"""Chloroethane 8.0ND0.8 """""Ethanol "191292 """""Trichlorofluoromethane (F11)J"5.61.21.2 """""Acetone "247.5120 """""Isopropyl alcohol J"253.725 """"""1,1-Dichloroethene 4.0ND1.5 """"""1,1,2-Trichlorotrifluoroethane (F113)7.7ND1.9 """""Methylene chloride (Dichloromethane)J"3.51.01.5 """""Carbon disulfide J"6.30.94.0 """"""trans-1,2-Dichloroethene 8.0ND1.0 """"""Vinyl acetate 3.6ND1.2 """"""1,1-Dichloroethane 4.1ND1.4 """""2-Butanone (MEK)J"302.07.9 """""n-Hexane J"3.61.41.6 """"""cis-1,2-Dichloroethene 4.0ND1.2 """""Ethyl acetate J"181.15.4 """"""Chloroform 4.9ND1.3 """""1,1,1-Trichloroethane J"5.51.23.2 """"""1,2-Dichloroethane (EDC)4.1ND1.3 """""Benzene J"3.20.72.5 """"""Carbon tetrachloride 6.4ND1.2 """"""Cyclohexane 17ND0.7 """""n-Heptane "4.12.18.0 """""Trichloroethene J"5.51.53.8 """"""1,2-Dichloropropane 9.4ND1.5 """"""Bromodichloromethane 6.8ND1.6 """"""cis-1,3-Dichloropropene 4.6ND1.2 """"""4-Methyl-2-pentanone (MIBK)8.3ND3.2 """"""trans-1,3-Dichloropropene 4.6ND1.2 """""Toluene "3.81.1110 Page 3 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-4R (E802006-01) Vapor Sampled: 31-Jan-18 Received: 01-Feb-18 EPA TO-1507-Feb-18 07-Feb-18ug/m3 EB8071111,1,2-Trichloroethane 5.5ND1.3 """"""2-Hexanone (MBK)8.3ND5.4 """"""Dibromochloromethane 8.6ND1.6 """""Tetrachloroethene "6.91.745 """"""1,2-Dibromoethane (EDB)7.8ND1.7 """"""1,1,1,2-Tetrachloroethane 7.0ND1.7 """"""Chlorobenzene 4.7ND1.2 """""Ethylbenzene QL-1H, J"4.41.33.0 """""m,p-Xylene "8.82.114 """"""Styrene 4.3ND1.5 """""o-Xylene J"4.41.54.0 """"""Bromoform 10ND2.0 """"""1,1,2,2-Tetrachloroethane 7.0ND2.0 """"""4-Ethyltoluene 5.0ND1.6 """""1,3,5-Trimethylbenzene J"5.01.71.8 """""1,2,4-Trimethylbenzene J"5.02.04.3 """"""1,3-Dichlorobenzene 12ND1.9 """"""1,4-Dichlorobenzene 12ND2.0 """"""1,2-Dichlorobenzene 12ND2.2 """""Naphthalene J"5.34.54.5 """"""1,2,4-Trichlorobenzene 38ND5.2 """"""Hexachlorobutadiene 54ND6.6 """"102 %76-134Surrogate: 1,2-Dichloroethane-d4 """"112 %78-125Surrogate: Toluene-d8 """"96.5 %77-127Surrogate: 4-Bromofluorobenzene Page 4 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-3R (E802006-02) Vapor Sampled: 31-Jan-18 Received: 01-Feb-18 EB80711 07-Feb-18 07-Feb-18ug/m3 1Propene EPA TO-158.70.731 """""Dichlorodifluoromethane (F12)J"5.01.22.7 """""Chloromethane J"2.10.61.4 """"""Dichlorotetrafluoroethane (F114)7.1ND1.8 """"""Vinyl chloride 2.6ND1.0 """"""Bromomethane 16ND1.2 """"""Chloroethane 8.0ND0.8 """""Ethanol "191226 """""Trichlorofluoromethane (F11)J"5.61.21.7 """""Acetone "247.530 """""Isopropyl alcohol J"253.74.8 """"""1,1-Dichloroethene 4.0ND1.5 """"""1,1,2-Trichlorotrifluoroethane (F113)7.7ND1.9 """""Methylene chloride (Dichloromethane)J"3.51.01.1 """""Carbon disulfide "6.30.910 """"""trans-1,2-Dichloroethene 8.0ND1.0 """"""Vinyl acetate 3.6ND1.2 """"""1,1-Dichloroethane 4.1ND1.4 """""2-Butanone (MEK)J"302.03.1 """""n-Hexane "3.61.414 """"""cis-1,2-Dichloroethene 4.0ND1.2 """"""Ethyl acetate 18ND1.1 """""Chloroform J"4.91.31.3 """"""1,1,1-Trichloroethane 5.5ND1.2 """"""1,2-Dichloroethane (EDC)4.1ND1.3 """""Benzene J"3.20.72.6 """"""Carbon tetrachloride 6.4ND1.2 """"""Cyclohexane 17ND0.7 """""n-Heptane "4.12.111 """"""Trichloroethene 5.5ND1.5 """"""1,2-Dichloropropane 9.4ND1.5 """"""Bromodichloromethane 6.8ND1.6 """"""cis-1,3-Dichloropropene 4.6ND1.2 """"""4-Methyl-2-pentanone (MIBK)8.3ND3.2 """"""trans-1,3-Dichloropropene 4.6ND1.2 """""Toluene "3.81.169 Page 5 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-3R (E802006-02) Vapor Sampled: 31-Jan-18 Received: 01-Feb-18 EPA TO-1507-Feb-18 07-Feb-18ug/m3 EB8071111,1,2-Trichloroethane 5.5ND1.3 """"""2-Hexanone (MBK)8.3ND5.4 """"""Dibromochloromethane 8.6ND1.6 """"""Tetrachloroethene 6.9ND1.7 """"""1,2-Dibromoethane (EDB)7.8ND1.7 """"""1,1,1,2-Tetrachloroethane 7.0ND1.7 """"""Chlorobenzene 4.7ND1.2 """""Ethylbenzene QL-1H, J"4.41.32.9 """""m,p-Xylene J"8.82.17.8 """"""Styrene 4.3ND1.5 """""o-Xylene J"4.41.52.6 """"""Bromoform 10ND2.0 """"""1,1,2,2-Tetrachloroethane 7.0ND2.0 """"""4-Ethyltoluene 5.0ND1.6 """"""1,3,5-Trimethylbenzene 5.0ND1.7 """""1,2,4-Trimethylbenzene J"5.02.03.2 """"""1,3-Dichlorobenzene 12ND1.9 """"""1,4-Dichlorobenzene 12ND2.0 """"""1,2-Dichlorobenzene 12ND2.2 """"""Naphthalene 5.3ND4.5 """"""1,2,4-Trichlorobenzene 38ND5.2 """"""Hexachlorobutadiene 54ND6.6 """"103 %76-134Surrogate: 1,2-Dichloroethane-d4 """"113 %78-125Surrogate: Toluene-d8 """"96.2 %77-127Surrogate: 4-Bromofluorobenzene Page 6 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-2R (E802006-03) Vapor Sampled: 31-Jan-18 Received: 01-Feb-18 EPA TO-1507-Feb-18 07-Feb-18ug/m3 EB807111Propene8.7ND0.7 """""Dichlorodifluoromethane (F12)J"5.01.22.2 """""Chloromethane J"2.10.60.8 """"""Dichlorotetrafluoroethane (F114)7.1ND1.8 """"""Vinyl chloride 2.6ND1.0 """"""Bromomethane 16ND1.2 """"""Chloroethane 8.0ND0.8 """""Ethanol "191295 """"""Trichlorofluoromethane (F11)5.6ND1.2 """""Acetone "247.5130 """""Isopropyl alcohol J"253.713 """"""1,1-Dichloroethene 4.0ND1.5 """"""1,1,2-Trichlorotrifluoroethane (F113)7.7ND1.9 """"""Methylene chloride (Dichloromethane)3.5ND1.0 """""Carbon disulfide J"6.30.92.6 """"""trans-1,2-Dichloroethene 8.0ND1.0 """"""Vinyl acetate 3.6ND1.2 """"""1,1-Dichloroethane 4.1ND1.4 """""2-Butanone (MEK)J"302.08.2 """""n-Hexane "3.61.44.6 """"""cis-1,2-Dichloroethene 4.0ND1.2 """"""Ethyl acetate 18ND1.1 """"""Chloroform 4.9ND1.3 """"""1,1,1-Trichloroethane 5.5ND1.2 """"""1,2-Dichloroethane (EDC)4.1ND1.3 """""Benzene "3.20.73.5 """"""Carbon tetrachloride 6.4ND1.2 """"""Cyclohexane 17ND0.7 """""n-Heptane "4.12.15.1 """"""Trichloroethene 5.5ND1.5 """"""1,2-Dichloropropane 9.4ND1.5 """"""Bromodichloromethane 6.8ND1.6 """"""cis-1,3-Dichloropropene 4.6ND1.2 """"""4-Methyl-2-pentanone (MIBK)8.3ND3.2 """"""trans-1,3-Dichloropropene 4.6ND1.2 """""Toluene "3.81.150 Page 7 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-2R (E802006-03) Vapor Sampled: 31-Jan-18 Received: 01-Feb-18 EPA TO-1507-Feb-18 07-Feb-18ug/m3 EB8071111,1,2-Trichloroethane 5.5ND1.3 """"""2-Hexanone (MBK)8.3ND5.4 """"""Dibromochloromethane 8.6ND1.6 """""Tetrachloroethene J"6.91.72.4 """"""1,2-Dibromoethane (EDB)7.8ND1.7 """"""1,1,1,2-Tetrachloroethane 7.0ND1.7 """"""Chlorobenzene 4.7ND1.2 """""Ethylbenzene QL-1H, J"4.41.32.4 """""m,p-Xylene "8.82.111 """"""Styrene 4.3ND1.5 """""o-Xylene "4.41.54.5 """"""Bromoform 10ND2.0 """"""1,1,2,2-Tetrachloroethane 7.0ND2.0 """""4-Ethyltoluene J"5.01.62.3 """"""1,3,5-Trimethylbenzene 5.0ND1.7 """"""1,2,4-Trimethylbenzene 5.0ND2.0 """"""1,3-Dichlorobenzene 12ND1.9 """"""1,4-Dichlorobenzene 12ND2.0 """"""1,2-Dichlorobenzene 12ND2.2 """"""Naphthalene 5.3ND4.5 """"""1,2,4-Trichlorobenzene 38ND5.2 """"""Hexachlorobutadiene 54ND6.6 """"103 %76-134Surrogate: 1,2-Dichloroethane-d4 """"90.5 %78-125Surrogate: Toluene-d8 """"96.1 %77-127Surrogate: 4-Bromofluorobenzene Page 8 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-1R (E802006-04) Vapor Sampled: 31-Jan-18 Received: 01-Feb-18 EB80711 07-Feb-18 07-Feb-18ug/m3 1Propene EEPA TO-158.70.73900 """""Dichlorodifluoromethane (F12)"5.01.28.6 """""Chloromethane "2.10.62.5 """"""Dichlorotetrafluoroethane (F114)7.1ND1.8 """""Vinyl chloride J"2.61.01.6 """"""Bromomethane 16ND1.2 """"""Chloroethane 8.0ND0.8 """""Ethanol "191240 """""Trichlorofluoromethane (F11)J"5.61.21.5 """""Acetone "247.5270 """""Isopropyl alcohol J"253.77.6 """"""1,1-Dichloroethene 4.0ND1.5 """"""1,1,2-Trichlorotrifluoroethane (F113)7.7ND1.9 """""Methylene chloride (Dichloromethane)J"3.51.01.2 """""Carbon disulfide "6.30.9370 """"""trans-1,2-Dichloroethene 8.0ND1.0 """"""Vinyl acetate 3.6ND1.2 """"""1,1-Dichloroethane 4.1ND1.4 """""2-Butanone (MEK)"302.033 """""n-Hexane "3.61.4130 """"""cis-1,2-Dichloroethene 4.0ND1.2 """"""Ethyl acetate 18ND1.1 """"""Chloroform 4.9ND1.3 """"""1,1,1-Trichloroethane 5.5ND1.2 """"""1,2-Dichloroethane (EDC)4.1ND1.3 """""Benzene "3.20.745 """"""Carbon tetrachloride 6.4ND1.2 """""Cyclohexane "170.768 """""n-Heptane "4.12.141 """"""Trichloroethene 5.5ND1.5 """"""1,2-Dichloropropane 9.4ND1.5 """"""Bromodichloromethane 6.8ND1.6 """"""cis-1,3-Dichloropropene 4.6ND1.2 """""4-Methyl-2-pentanone (MIBK)J"8.33.25.4 """"""trans-1,3-Dichloropropene 4.6ND1.2 """""Toluene "3.81.1110 Page 9 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-1R (E802006-04) Vapor Sampled: 31-Jan-18 Received: 01-Feb-18 EPA TO-1507-Feb-18 07-Feb-18ug/m3 EB8071111,1,2-Trichloroethane 5.5ND1.3 """"""2-Hexanone (MBK)8.3ND5.4 """"""Dibromochloromethane 8.6ND1.6 """""Tetrachloroethene "6.91.712 """"""1,2-Dibromoethane (EDB)7.8ND1.7 """"""1,1,1,2-Tetrachloroethane 7.0ND1.7 """"""Chlorobenzene 4.7ND1.2 """""Ethylbenzene QL-1H"4.41.320 """""m,p-Xylene "8.82.112 """""Styrene "4.31.55.0 """""o-Xylene "4.41.57.6 """"""Bromoform 10ND2.0 """"""1,1,2,2-Tetrachloroethane 7.0ND2.0 """"""4-Ethyltoluene 5.0ND1.6 """"""1,3,5-Trimethylbenzene 5.0ND1.7 """"""1,2,4-Trimethylbenzene 5.0ND2.0 """"""1,3-Dichlorobenzene 12ND1.9 """"""1,4-Dichlorobenzene 12ND2.0 """"""1,2-Dichlorobenzene 12ND2.2 """"""Naphthalene 5.3ND4.5 """"""1,2,4-Trichlorobenzene 38ND5.2 """"""Hexachlorobutadiene 54ND6.6 """"98.9 %76-134Surrogate: 1,2-Dichloroethane-d4 """"118 %78-125Surrogate: Toluene-d8 """"96.7 %77-127Surrogate: 4-Bromofluorobenzene Page 10 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportDup (E802006-05) Vapor Sampled: 31-Jan-18 Received: 01-Feb-18 EB80711 07-Feb-18 07-Feb-18ug/m3 1Propene EEPA TO-158.70.74300 """""Dichlorodifluoromethane (F12)"5.01.27.1 """""Chloromethane "2.10.611 """"""Dichlorotetrafluoroethane (F114)7.1ND1.8 """""Vinyl chloride J"2.61.01.8 """"""Bromomethane 16ND1.2 """"""Chloroethane 8.0ND0.8 """""Ethanol "191239 """""Trichlorofluoromethane (F11)J"5.61.21.4 """"""Acetone 24ND7.5 """""Isopropyl alcohol J"253.78.7 """"""1,1-Dichloroethene 4.0ND1.5 """"""1,1,2-Trichlorotrifluoroethane (F113)7.7ND1.9 """""Methylene chloride (Dichloromethane)J"3.51.01.2 """""Carbon disulfide "6.30.9340 """"""trans-1,2-Dichloroethene 8.0ND1.0 """"""Vinyl acetate 3.6ND1.2 """"""1,1-Dichloroethane 4.1ND1.4 """""2-Butanone (MEK)"302.033 """""n-Hexane "3.61.4120 """"""cis-1,2-Dichloroethene 4.0ND1.2 """"""Ethyl acetate 18ND1.1 """""Chloroform J"4.91.31.3 """"""1,1,1-Trichloroethane 5.5ND1.2 """"""1,2-Dichloroethane (EDC)4.1ND1.3 """""Benzene "3.20.744 """"""Carbon tetrachloride 6.4ND1.2 """""Cyclohexane "170.765 """""n-Heptane "4.12.139 """"""Trichloroethene 5.5ND1.5 """"""1,2-Dichloropropane 9.4ND1.5 """"""Bromodichloromethane 6.8ND1.6 """"""cis-1,3-Dichloropropene 4.6ND1.2 """""4-Methyl-2-pentanone (MIBK)J"8.33.26.9 """"""trans-1,3-Dichloropropene 4.6ND1.2 """""Toluene "3.81.1110 Page 11 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportDup (E802006-05) Vapor Sampled: 31-Jan-18 Received: 01-Feb-18 EPA TO-1507-Feb-18 07-Feb-18ug/m3 EB8071111,1,2-Trichloroethane 5.5ND1.3 """"""2-Hexanone (MBK)8.3ND5.4 """"""Dibromochloromethane 8.6ND1.6 """""Tetrachloroethene "6.91.711 """"""1,2-Dibromoethane (EDB)7.8ND1.7 """"""1,1,1,2-Tetrachloroethane 7.0ND1.7 """"""Chlorobenzene 4.7ND1.2 """""Ethylbenzene QL-1H"4.41.319 """""m,p-Xylene "8.82.113 """""Styrene "4.31.55.3 """""o-Xylene "4.41.57.2 """"""Bromoform 10ND2.0 """"""1,1,2,2-Tetrachloroethane 7.0ND2.0 """"""4-Ethyltoluene 5.0ND1.6 """"""1,3,5-Trimethylbenzene 5.0ND1.7 """"""1,2,4-Trimethylbenzene 5.0ND2.0 """"""1,3-Dichlorobenzene 12ND1.9 """"""1,4-Dichlorobenzene 12ND2.0 """"""1,2-Dichlorobenzene 12ND2.2 """"""Naphthalene 5.3ND4.5 """"""1,2,4-Trichlorobenzene 38ND5.2 """"""Hexachlorobutadiene 54ND6.6 """"101 %76-134Surrogate: 1,2-Dichloroethane-d4 """"95.3 %78-125Surrogate: Toluene-d8 """"95.7 %77-127Surrogate: 4-Bromofluorobenzene Page 12 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by EPA TO-15 - Quality Control H&P Mobile Geochemistry, Inc. Batch EB80711 - TO-15 Blank (EB80711-BLK1)Prepared & Analyzed: 06-Feb-18 Propene ug/m38.7ND Dichlorodifluoromethane (F12)"5.0ND Chloromethane "2.1ND Dichlorotetrafluoroethane (F114)"7.1ND Vinyl chloride "2.6ND Bromomethane "16ND Chloroethane "8.0ND Ethanol "19ND Trichlorofluoromethane (F11)"5.6ND Acetone "24ND Isopropyl alcohol "25ND 1,1-Dichloroethene "4.0ND 1,1,2-Trichlorotrifluoroethane (F113)"7.7ND Methylene chloride (Dichloromethane)"3.5ND Carbon disulfide "6.3ND trans-1,2-Dichloroethene "8.0ND Vinyl acetate "3.6ND 1,1-Dichloroethane "4.1ND 2-Butanone (MEK)"30ND n-Hexane "3.6ND cis-1,2-Dichloroethene "4.0ND Ethyl acetate "18ND Chloroform "4.9ND 1,1,1-Trichloroethane "5.5ND 1,2-Dichloroethane (EDC)"4.1ND Benzene "3.2ND Carbon tetrachloride "6.4ND Cyclohexane "17ND n-Heptane "4.1ND Trichloroethene "5.5ND 1,2-Dichloropropane "9.4ND Bromodichloromethane "6.8ND cis-1,3-Dichloropropene "4.6ND 4-Methyl-2-pentanone (MIBK)"8.3ND Page 13 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by EPA TO-15 - Quality Control H&P Mobile Geochemistry, Inc. Batch EB80711 - TO-15 Blank (EB80711-BLK1)Prepared & Analyzed: 06-Feb-18 trans-1,3-Dichloropropene ug/m34.6ND Toluene "3.8ND 1,1,2-Trichloroethane "5.5ND 2-Hexanone (MBK)"8.3ND Dibromochloromethane "8.6ND Tetrachloroethene "6.9ND 1,2-Dibromoethane (EDB)"7.8ND 1,1,1,2-Tetrachloroethane "7.0ND Chlorobenzene "4.7ND Ethylbenzene "4.4ND m,p-Xylene "8.8ND Styrene "4.3ND o-Xylene "4.4ND Bromoform "10ND 1,1,2,2-Tetrachloroethane "7.0ND 4-Ethyltoluene "5.0ND 1,3,5-Trimethylbenzene "5.0ND 1,2,4-Trimethylbenzene "5.0ND 1,3-Dichlorobenzene "12ND 1,4-Dichlorobenzene "12ND 1,2-Dichlorobenzene "12ND Naphthalene "5.3ND 1,2,4-Trichlorobenzene "38ND Hexachlorobutadiene "54ND "214 76-134Surrogate: 1,2-Dichloroethane-d4 101217 "207 78-125Surrogate: Toluene-d8 99.3206 "364 77-127Surrogate: 4-Bromofluorobenzene 97.5355 Page 14 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by EPA TO-15 - Quality Control H&P Mobile Geochemistry, Inc. Batch EB80711 - TO-15 LCS (EB80711-BS1)Prepared & Analyzed: 06-Feb-18 Dichlorodifluoromethane (F12)ug/m3 101 59-1281015.0100 Vinyl chloride "52.0 64-12796.62.650 Chloroethane "53.6 63-12789.88.048 Trichlorofluoromethane (F11)"113 62-12697.55.6110 1,1-Dichloroethene "80.8 61-1331034.083 1,1,2-Trichlorotrifluoroethane (F113)"155 66-1261027.7160 Methylene chloride (Dichloromethane)"70.8 62-11599.33.570 trans-1,2-Dichloroethene "80.8 67-12496.88.078 1,1-Dichloroethane "82.4 68-12695.94.179 cis-1,2-Dichloroethene "80.0 70-1211024.082 Chloroform "99.2 68-1231074.9110 1,1,1-Trichloroethane "111 68-1251025.5110 1,2-Dichloroethane (EDC)"82.4 65-1281024.184 Benzene "64.8 69-1191033.267 Carbon tetrachloride "128 68-13297.86.4130 Trichloroethene "110 71-1231035.5110 Toluene "76.8 66-1191013.877 1,1,2-Trichloroethane "111 73-1191025.5110 Tetrachloroethene "138 66-1241056.9140 1,1,1,2-Tetrachloroethane "140 67-1291107.0150 Ethylbenzene "88.4 QL-1H70-1241254.4110 m,p-Xylene "88.4 61-1341168.8100 o-Xylene "88.4 67-1251114.498 1,1,2,2-Tetrachloroethane "140 65-1271047.0150 "214 76-134Surrogate: 1,2-Dichloroethane-d4 104222 "207 78-125Surrogate: Toluene-d8 97.2201 "364 77-127Surrogate: 4-Bromofluorobenzene 97.6356 Page 15 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by EPA TO-15 - Quality Control H&P Mobile Geochemistry, Inc. Batch EB80711 - TO-15 LCS Dup (EB80711-BSD1)Prepared & Analyzed: 06-Feb-18 Dichlorodifluoromethane (F12)ug/m3 101 2559-128104 2.235.0100 Vinyl chloride "52.0 2564-12796.6 0.002.650 Chloroethane "53.6 2563-12790.0 0.1678.048 Trichlorofluoromethane (F11)"113 2562-12696.9 0.6155.6110 1,1-Dichloroethene "80.8 2561-133105 1.974.085 1,1,2-Trichlorotrifluoroethane (F113)"155 2566-126104 1.217.7160 Methylene chloride (Dichloromethane)"70.8 2562-11596.8 2.543.569 trans-1,2-Dichloroethene "80.8 2567-12496.7 0.1038.078 1,1-Dichloroethane "82.4 2568-12695.9 0.05204.179 cis-1,2-Dichloroethene "80.0 2570-121104 1.664.083 Chloroform "99.2 2568-123102 4.854.9100 1,1,1-Trichloroethane "111 2568-125101 0.5365.5110 1,2-Dichloroethane (EDC)"82.4 2565-128105 2.264.186 Benzene "64.8 2569-119105 2.023.268 Carbon tetrachloride "128 2568-13295.7 2.126.4120 Trichloroethene "110 2571-123104 0.7215.5110 Toluene "76.8 2566-119100 0.4453.877 1,1,2-Trichloroethane "111 2573-119101 0.8285.5110 Tetrachloroethene "138 2566-124104 0.4796.9140 1,1,1,2-Tetrachloroethane "140 2567-129111 0.2257.0150 Ethylbenzene "88.4 2570-124123 1.724.4110 m,p-Xylene "88.4 2561-134117 1.458.8100 o-Xylene "88.4 2567-125112 1.124.499 1,1,2,2-Tetrachloroethane "140 2565-127105 0.8557.0150 "214 76-134Surrogate: 1,2-Dichloroethane-d4 103220 "207 78-125Surrogate: Toluene-d8 114235 "364 77-127Surrogate: 4-Bromofluorobenzene 98.1358 Page 16 of 17 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS020118-11 Rev 2 Tryon Place Mr. Chris OrrellCharlotte, NC 28217 16-May-18 08:18 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Notes and Definitions QL-1H The LCS and/or LCSD recoveries fell above the established control specifications for this analyte. Any result for this compound is qualified and should be considered biased high. QL-1H The LCS and/or LCSD recoveries fell above the established control specifications for this analyte. Any result for this compound is qualified and should be considered biased high. J- Report This sample is reported to the MDL or LOD determined for this method. All confirmed hits above the listed MDL or LOD value and below the RL/LOQ, will be flagged with a "J" result. If an MDL or LOD is not listed, the analyte is ND at the RL. J Detected but below the RL/LOQ; therefore, result is an estimated concentration. E The concentration indicated for this analyte is an estimated value above the calibration range of the instrument. This value is considered an estimate (CLP E-flag). Percent Recovery Relative Percent DifferenceRPD %REC Method Detection LimitMDL Analyte NOT DETECTED at or above the reporting limitND Leak Check CompoundLCC Appendix H&P Mobile Geochemistry, Inc. is approved as an Environmental Testing Laboratory and Mobile Laboratory in accordance with the DoD-ELAP Program and ISO/IEC 17025:2005 programs through PJLA, accreditation number 69070 for EPA Method TO-15, H&P Method TO-15, EPA Method 8260B and H&P 8260SV. H&P is approved by the State of Arizona as an Environmental Testing Laboratory and Mobile Laboratory, certification numbers AZM758 and AZ0779. H&P is approved by the State of California as an Environmental Laboratory and Mobile Laboratory in conformance with the Environmental Laboratory Accreditation Program (ELAP) for the category of Volatile and Semi-Volatile Organic Chemistry of Hazardous Waste, certification numbers 2740, 2741, 2743, 2744, 2745, 2754 & 2930. H&P is approved by the State of Florida Department of Health under the National Environmental Laboratory Accreditation Conference (NELAC) certification number E871100. The complete list of stationary and mobile laboratory certifications along with the fields of testing (FOTs) and analyte lists are available at www.handpmg.com/about/certifications. All soil results are reported in wet weight. Page 17 of 17 Mobile Geochemistry, Inc. 2470 Impala Drive, Carlsbad. CA 92010 & Field Office - Signal Hill, CA W handpmg.com E info@handpmg.com P 760.804.9678 F 760.804.9159 VAPOR / AIR Chain of Custody DATE:. Page I of Lab Client and Project Information Sample Receipt (Lab Use Only) Lab Client/Consuitant n t-f .6 Ze.N.A.1+%,— .4— PN2itic,t Name 4' ,. AtAa- _ IWO' ••• . —", • Date Rec'd: / 1 a Control It: gOtcps I Lab Client Project Manager: c...4-,•,--t, 0,,,,,,k Project Location: C kux.ii-kA-1A--Ire., , 1....lti." H&P Project # Ecs 02.011.rg-Il Lab Client Address:,,,,, 'IS ---.0- C..cdon 'me- } >"ei:.. )).e , ,.;,,„,,,irt,',..,) Report E-Mail(s): i •V5\•etbArk 1-g eQ-S v"Y\‘‘-€4'clr u:oircen 6 ... .. , Lab Work Order # TOW-VIC, Lab Client City, State, Zip: 1-e, Sample Intact Y Notes Below • No • See , Phone Number.7r) t Y 7i-4.7-1I,1 Receipt Gauge ID: Sc o5 Temp: KT Reporting Requirements Turnaround Time I Sampler Information Outside Lab: W 5-7 day Stnd Rush Rush Sampler(s): C -, e)....,—/S\ Receipt Notes/Tracking #: 12155g501(00g Lab PM Initials: 1614 911,standard Report • Level Ill • Level IV • 24-Hr Rush 0 Mobile Lab Signature: 1/it ..--A0k, Excel EDD • Other EDD: • 3-day CA Geotracker Global ID: Date: 1 , 31 . li. • • 48-Hr • Other Additional Instructions to Laboratory:tdlc( Tictiltds41ne * Preferred VPC units (please choose one): -27 r2A) Ekrzanoll E,1-Kilitce-fateu-cplavle SOOVOUlell Tdoiet,:f-Dnee,F.Itfrrytt40 ) . r 1 tleu A 1\10,4-141‘yi,b24421frc.Ferei V t f-1.0 Ac c. "pap S' VOCs Standard Full List q 8260SV El TO-15 VOCs Short List! Project List q 8260SV q TO-15 Oxygenates q 8260SV q TO-15 Naphthalene IL1 8260SV q TO-15 TPHv as Gas 8260SVm q TO-15m Aromatic/Aliphatic Fractions q 8260SVm q TO-15m Leak Check Compound q DFA q IPA q He [Methane by EPA 8015m 4 Fixed Gases by ASTM D1945 q CO2 002 q N2 E pgil_ g4.1.giml 0 ppbv • ppmv FIELD POINT NAME SAMPLE NAME (if applicable) DATE TIME mrn/ddlyy 24hr dock SAMPLE TYPE Indoor Air um, Ambient Air AA), Subsiab (SS), Soil vapor (S,i) CONTAINER SIZE & TYPE 400mLI11.161. Surma, Tedlar, Tube, et. Iff, „,... E.( li i,-- 8 Lab use only; Receipt Vac S (, -1-i P., i8iii.c 1:7,1.-7 ) 1,-1,01,...A— .--la \ ' 411 )4, <,(,- 214. 1•7,1..77 I, Q)-)0 -5.0 ..../....- an._ 1 t 1,..,7) 1 I -)../c, "5.08 -7->k,..k,r) , _I _ —1-_,, ....1,--. ir ?) "q• g5 6 1511? V- P0z1--/V NU-- t-dt-A-T.Ettef) 0- A., I _ - ,,, ReZA,,,e, byqoloctiatv Z. 1 I t t g t.: 14S F I'l Appoved/Reliriquisned by: ainpany: Date: Time: Received by: Company: Date: Tore: Approved/Relinquished by Company Date: Time: Received by: Company: Date- Time' 'Approval constit5n3s as to proceed with analysis and acceptance of conditions on tack Appendix Mt. Rev 523/2016. Effective 523/20/6 APPENDIX D Summary of Risk Assessment Output Output Form 1A Version Date: October 2017 Basis: June 2017 EPA RSL Table Site ID: 17038-13-060 Exposure Unit ID: Worst Case S Tryon Building Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded? Soil Combined Pathways 0.0E+00 0.0E+00 NO Groundwater Combined Pathways*0.0E+00 0.0E+00 NO Soil Combined Pathways 0.0E+00 0.0E+00 NO Groundwater Combined Pathways*0.0E+00 0.0E+00 NO Construction Worker Soil Combined Pathways 0.0E+00 0.0E+00 NO Soil Combined Pathways 0.0E+00 0.0E+00 NO Surface Water Combined Pathways*0.0E+00 0.0E+00 NO Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded? Groundwater to Indoor Air 0.0E+00 0.0E+00 NO Soil Gas to Indoor Air 5.4E-05 4.0E+00 YES Indoor Air 0.0E+00 0.0E+00 NO Groundwater to Indoor Air 0.0E+00 0.0E+00 NO Soil Gas to Indoor Air 2.1E-06 3.2E-01 NO Indoor Air 0.0E+00 0.0E+00 NO Pathway Source Source Soil NM Source Groundwater NM Source Soil NM Source Groundwater NM 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. Protection of Surface Water Exceedence of 2B at POE? Exceedence of 2B at POE? VAPOR INTRUSION CALCULATORS Resident Non-Residential Worker CONTAMINANT MIGRATION CALCULATORS Target POE Concentrations Exceeded? Protection of Groundwater Use Exceedence of 2L at POE? Exceedence of 2L at POE? 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: PRIMARY CALCULATORS Resident Non-Residential Worker User Defined North Carolina DEQ Risk Calculator Summary of Risk Assessment Output Output Form 1A Version Date: October 2017 Basis: June 2017 EPA RSL Table Site ID: 17038-13-060 Exposure Unit ID: Worst Case Stonewall Building Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded? Soil Combined Pathways 0.0E+00 0.0E+00 NO Groundwater Combined Pathways*0.0E+00 0.0E+00 NO Soil Combined Pathways 0.0E+00 0.0E+00 NO Groundwater Combined Pathways*0.0E+00 0.0E+00 NO Construction Worker Soil Combined Pathways 0.0E+00 0.0E+00 NO Soil Combined Pathways 0.0E+00 0.0E+00 NO Surface Water Combined Pathways*0.0E+00 0.0E+00 NO Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded? Groundwater to Indoor Air 0.0E+00 0.0E+00 NO Soil Gas to Indoor Air 1.2E-04 3.0E+01 YES Indoor Air 0.0E+00 0.0E+00 NO Groundwater to Indoor Air 0.0E+00 0.0E+00 NO Soil Gas to Indoor Air 8.8E-06 2.3E+00 YES Indoor Air 0.0E+00 0.0E+00 NO Pathway Source Source Soil NM Source Groundwater NM Source Soil NM Source Groundwater NM PRIMARY CALCULATORS Resident Non-Residential Worker User Defined 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. Protection of Surface Water Exceedence of 2B at POE? Exceedence of 2B at POE? VAPOR INTRUSION CALCULATORS Resident Non-Residential Worker CONTAMINANT MIGRATION CALCULATORS Target POE Concentrations Exceeded? Protection of Groundwater Use Exceedence of 2L at POE? Exceedence of 2L at POE? 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 APPENDIX E Page 1 of 203 Page 2 of 203 Page 3 of 203 Page 4 of 203 Page 5 of 203 Page 6 of 203 Page 7 of 203 Page 8 of 203 Page 9 of 203 Page 10 of 203 Page 11 of 203 Page 12 of 203 Page 13 of 203 Page 14 of 203 Page 15 of 203 Page 16 of 203 Page 17 of 203 Page 18 of 203 Page 19 of 203 Page 20 of 203 Page 21 of 203 Page 22 of 203 Page 23 of 203 Page 24 of 203 Page 25 of 203 Page 26 of 203 Page 27 of 203 Page 28 of 203 Page 29 of 203 Page 30 of 203 Page 31 of 203 Page 32 of 203 Page 33 of 203 Page 34 of 203 Page 35 of 203 Page 36 of 203 Page 37 of 203 Page 38 of 203 Page 39 of 203 Page 40 of 203 Page 41 of 203 Page 42 of 203 Page 43 of 203 Page 44 of 203 Page 45 of 203 Page 46 of 203 Page 47 of 203 Page 48 of 203 Page 49 of 203 Page 50 of 203 Page 51 of 203 Page 52 of 203 Page 53 of 203 Page 54 of 203 Page 55 of 203 Page 56 of 203 Page 57 of 203 Page 58 of 203 Page 59 of 203 Page 60 of 203 Page 61 of 203 Page 62 of 203 Page 63 of 203 Page 64 of 203 Page 65 of 203 Page 66 of 203 Page 67 of 203 Page 68 of 203 Page 69 of 203 Page 70 of 203 Page 71 of 203 Page 72 of 203 Page 73 of 203 Page 74 of 203 Page 75 of 203 Page 76 of 203 Page 77 of 203 Page 78 of 203 Page 79 of 203 Page 80 of 203 Page 81 of 203 Page 82 of 203 Page 83 of 203 Page 84 of 203 Page 85 of 203 Page 86 of 203 Page 87 of 203 Page 88 of 203 Page 89 of 203 Page 90 of 203 Page 91 of 203 Page 92 of 203 Page 93 of 203 Page 94 of 203 Page 95 of 203 Page 96 of 203 Page 97 of 203 Page 98 of 203 Page 99 of 203 Page 100 of 203 Page 101 of 203 Page 102 of 203 Page 103 of 203 Page 104 of 203 Page 105 of 203 Page 106 of 203 Page 107 of 203 Page 108 of 203 Page 109 of 203 Page 110 of 203 Page 111 of 203 Page 112 of 203 Page 113 of 203 Page 114 of 203 Page 115 of 203 Page 116 of 203 Page 117 of 203 Page 118 of 203 Page 119 of 203 Page 120 of 203 Page 121 of 203 Page 122 of 203 Page 123 of 203 Page 124 of 203 Page 125 of 203 Page 126 of 203 Page 127 of 203 Page 128 of 203 Page 129 of 203 Page 130 of 203 Page 131 of 203 Page 132 of 203 Page 133 of 203 Page 134 of 203 Page 135 of 203 Page 136 of 203 Page 137 of 203 Page 138 of 203 Page 139 of 203 Page 140 of 203 Page 141 of 203 Page 142 of 203 Page 143 of 203 Page 144 of 203 Page 145 of 203 Page 146 of 203 Page 147 of 203 Page 148 of 203 Page 149 of 203 Page 150 of 203 Page 151 of 203 Page 152 of 203 Page 153 of 203 Page 154 of 203 Page 155 of 203 Page 156 of 203 Page 157 of 203 Page 158 of 203 Page 159 of 203 Page 160 of 203 Page 161 of 203 Page 162 of 203 Page 163 of 203 Page 164 of 203 Page 165 of 203 Page 166 of 203 Page 167 of 203 Page 168 of 203 Page 169 of 203 Page 170 of 203 Page 171 of 203 Page 172 of 203 Page 173 of 203 Page 174 of 203 Page 175 of 203 Page 176 of 203 Page 177 of 203 Page 178 of 203 Page 179 of 203 Page 180 of 203 Page 181 of 203 Page 182 of 203 Page 183 of 203 Page 184 of 203 Page 185 of 203 Page 186 of 203 Page 187 of 203 Page 188 of 203 Page 189 of 203 Page 190 of 203 Page 191 of 203 Page 192 of 203 Page 193 of 203 Page 194 of 203 Page 195 of 203 Page 196 of 203 Page 197 of 203 Page 198 of 203 Page 199 of 203 Page 200 of 203 Page 201 of 203 Page 202 of 203 Page 203 of 203 APPENDIX F