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Home My WebLink About22055-18-060-IndoorAirAssessmentReport_04.17.2019Report of Additional Assessment 2151 Hawkins Street Property ECS Project No. 49-7172-E April 17, 2019 1 TABLE OF CONTENTS 1.0 PROJECT INFORMATION .................................................................................................................... 1 2.0 SCOPE OF SERVICES ............................................................................................................................ 5 3.0 RESULTS .............................................................................................................................................. 6 4.0 DISCUSSION ........................................................................................................................................ 7 5.0 CONCLUSIONS .................................................................................................................................... 8 6.0 RECOMMENDATIONS ......................................................................................................................... 8 7.0 QUALIFICATIONS OF REPORT ............................................................................................................. 8 FIGURES Figure 1 Site Topographic Map Figure 2 Site Location Map Figure 3 Sub-Slab Soil Gas Sample Location Map Figure 4 Indoor Air Sample Location Map TABLES Table 1 Summary of Sub-Slab Soil Gas Analytical Results Table 2 Summary of Indoor Air Analytical Results APPENDICES Appendix A Weather Information for March 17, 2019 Appendix B Laboratory Analytical Data Report of Additional Assessment 2151 Hawkins Street Property ECS Project No. 49-7172-E April 17, 2019 1 1.0 PROJECT INFORMATION 1.1 PROJECT INFORMATION The subject property is located at 2151 Hawkins Street in Charlotte, Mecklenburg County, North Carolina and identified by the Mecklenburg County GIS as Parcel Identification Number (PIN) 12103112. The site currently consists of an approximate 28,329-square foot multi-tenant office building that was constructed in 1957. Figure 1 is a site topographic map. Figure 2 is a site location map. ECS conducted a Phase I Environmental Site Assessment (ESA) of the subject property which is summarized in a Phase I Environmental Site Assessment Report dated June 28, 2018 (ECS Project Number 49-7172). Based on the historical research conducted during the Phase I ESA, ECS understands that the subject property appears to have been developed in at least 1890 with railroad spurs and a ginnery. In approximately 1896, the subject property appears to have been occupied with a portion of the Charlotte Oil and Fertilizer Works facility and was occupied with an oil tank. In approximately 1900, an underground oil tank to be used for a reservoir was located at the subject property, as well as a cooper shop. In approximately 1905, a 150,000-gallon reservoir was located at the subject property. The reservoir was increased to 650,000-gallons in approximately 1911. In 1911, the subject property was also occupied with a mattress warehouse, transformer house, railroad spurs, and cotton shed. Between approximately 1929 and 1953, the reservoir was 600,000-gallons in size and the subject property appears to have been associated with a portion of an oil company. In 1957, the subject property was occupied with an approximate 28,329-square foot building that has been occupied with Tarcon Inc. Frt Forwarders, Southern Flooring and Acoustical Co., Advanced Chemical Technology, Grice Showcase and Display Manufacturing Co. Office (display fixture manufacturer), Design Tex Fabrics Inc., Global Networkers 2 S, Shook Terry, Technic One 1 5S, and Whelchel and Assoc. Inc. 2O., Home Instead Senior Care, Mincey Mountain Holdings LLC, SportsOneSource LLC, McCracken and Lopez PA, Nediri LLC, New Life Building Supplies, SKNC LLC, and South End Ventures. The following recognized environmental conditions (RECs) were noted in the Phase I ESA:  ECS considers the former underground oil tank reservoir, ranging between 150,000-gallons to 650,000-gallons, as well as the historical use of the property associated with the former oil and fertilizer facility to be a REC of the subject property.  South Boulevard Property, 2000 South Boulevard - Located on the southeast adjacent property. According to a Post-Closure Groundwater Quality Monitoring Plan dated May 2003 by AEI, measured groundwater flow at this facility is east, north, and west. According to the figures in the plan, several monitoring wells were installed at this facility and in the vicinity of this facility. Monitoring wells ROW3/3A were installed by the NCDOT Right of Way on the northern boundary of the subject property. According to the groundwater results, detections were detected above the North Carolina 2L groundwater quality standards (NC2LGWQS) including tetrachloroethene (also known as perchloroethene or PCE). PCE was detected at a concentration of 8.4 micrograms per liter (µg/L). In addition, several monitoring wells to the south had detections above their respective NC2LGWQS, with measured groundwater flow towards the subject property. Report of Additional Assessment 2151 Hawkins Street Property ECS Project No. 49-7172-E April 17, 2019 2 According to a Brownfields Program Environmental Management Plan dated November 11, 2016, trichloroethene (TCE) was detected in a temporary monitoring well located approximately 70 feet southwest from the subject property at concentrations above its NC2LGWQS. According to the online NCDEQ Brownfields Map, the status of this brownfield agreement is listed as recorded. According to the database, there is a vapor intrusion requirement zone for this property. Based on the documented contamination at this facility, measured groundwater flow direction, and 2003 groundwater sample result near the right-of-way at the subject property, ECS considers this listing to be a REC for the subject property.  Virginia Carolina Chemical (VCC) Charlotte, 349 Tremont Avenue - Formerly located on the northwest adjacent property. This facility is listed on the SEMS database. According to a Removal Site Evaluation Report dated July 2010 and completed by Arcadis, the Virginia Carolina Chemical Company purchased this facility from the Charlotte Oil and Fertilizer Company in 1901. This facility began fertilizer manufacturing prior and 1890 until approximately the 1930s. This facility reportedly had an acid chamber that burned down in 1934. Sulfur burners were reportedly present at this facility in the 1890s to early 1900s. Structures associated with this facility included fertilizer buildings (mixing and storage), an acid chamber, associated burners, dry mixing plant, a supply house, a wash house, railroad sidings, a fertilizer factory, a fertilizer warehouse, a bag house, a 50,000-gallon water tower, and offices. According to the figures in the report, railroad sidings were located approximately 100 feet northwest from the subject property and a wash house was located approximately 450 feet northwest from the subject property. According to a Site Delineation Report and Removal Action Work Plan dated December 2012 and completed by Arcadis, several groundwater and soil samples were collected at this facility. Soil samples were collected nearest to the site, on the northwest adjacent parcel (parcel number 12103212) that revealed arsenic levels exceeding the screening level. Monitoring wells were installed on the northwestern portion of this facility with measured groundwater flow direction to the northeast. The monitoring wells are located at least 540 feet northwest. Groundwater sampling reveals detections of lead and arsenic above their respective NC2LGWWS. Groundwater was not collected on the northwest adjacent parcel (parcel 12103212). A Removal Action Completion Report dated May 2014 and completed by Arcadis, indicates a plan for the implementation of institutional controls at this facility. Arcadis indicated that a recordable survey plat would be prepared that prohibited the disturbance of soils and restricts the use of groundwater in specific areas including the northwest adjacent parcel (12103212). According to the historical Sanborn Map review, it appears the subject property was associated with the former fertilizer and oil company. Based on the lack of groundwater sampling near the subject property, as well as the proposed land-use restrictions for the northwest adjacent parcel, ECS considers this facility to be a REC for the subject property. Report of Additional Assessment 2151 Hawkins Street Property ECS Project No. 49-7172-E April 17, 2019 3  C & P Properties, 2161 Hawkins Avenue - Located on the southwest adjoining property and topographically crossgradient from the subject property. According to an Initial Abatement Action and Phase I LSA Report completed by Hart and Hickman (H&H) and dated August 21, 2008, this facility had two 500-gallon new/used oil underground storage tanks (USTs), two 10,000-gallon diesel USTs, and two 7,500-gallon gasoline USTs. The USTs were reportedly removed in 1988. Several monitoring wells were installed at this facility. Groundwater results revealed concentrations of volatile organic compounds (VOCs) above their respective NC2LGWQS. According to an October 7, 2008 letter from NCDEQ, this facility received a letter of no further action with a notice of residual petroleum. Based on the documented groundwater concentration and distance from the subject property, ECS considers this facility to be a REC for the subject property. In August 2018, ECS performed additional intrusive environmental assessment activities at the subject property which included the advancement and sampling of six Geoprobe® soil borings, the collection of six groundwater samples from Geoprobe® groundwater sampling points. The results of the August 2018 assessment activities are summarized in a Report of Environmental Assessment dated August 23, 2018. (ECS Project Number 49-7172-A). During the August 2018, assessment activities, total petroleum hydrocarbons (TPH) as gasoline range organics (GRO) and diesel range organics (DRO) were detected in soil samples from soil boring SB-5. TPH- DRO was detected in soil samples from SB-1, SB-3, SB-4, SB-5, and SB-6. Neither TPH-GRO nor TPH-DRO was detected in samples from soil boring SB-2. The detected concentrations of TPH-GRO and TPH-FRO were at concentrations above laboratory detection limits but below NCDEQ action levels. TPH as either GRO or DRO was not detected in samples from the remaining soil boring (SB-2). Neither nitrates nor nitrites were detected in samples from the six borings. During the August 2018, assessment activities, several VOCs were detected in four of the six groundwater sampling points. Laboratory analysis of groundwater sample GW-4 detected TCE at a concentration of 88 ug/L, which is above its NC2LGWQS of 3 ug/L, and the NCDEQ Residential and Industrial Vapor Intrusion Screening Levels (VISLs) of 1 ug/L and 4.4 ug/L, respectively. Additionally, PCE and 1,2-dichloroethane (DCA) were detected at concentrations above their respective NC2LGWQS but below their respective NCDEQ VISLs. Several other chlorinated compounds including 1,1-DCA, 1,1-dichloroethylene (DCE), cis-1,2-DCE, and trans-1,2-DCE were detected at concentrations above the laboratory reporting limits but below their respective NC2LGWQS. Acetone, a common laboratory contaminant, was detected at a concentration of 16 ug/L, which is below the NC2LGWQS of 6,000 ug/L. Laboratory analysis of groundwater sample GW-2 detected PCE at a concentration of 2.2 ug/L, which is above the NC2LGWQS of 0.7 ug/L, but below the NCDEQ Residential VISL of 12 ug/L. Additionally, TCE was detected at a concentration of 0.71 ug/L, which is below the NC2LGWQS of 3 ug/L. Laboratory analysis of groundwater sample GW-1 detected acetone and cis-1,2-DCE at concentrations below their respective NC2LGWQS. Report of Additional Assessment 2151 Hawkins Street Property ECS Project No. 49-7172-E April 17, 2019 4 Laboratory analysis of groundwater sample GW-3 detected TCE at concentrations of 0.56 ug/L, which is below the NC2LGWQ of 3 ug/L. Laboratory analysis of groundwater sample GW-6 did not detect targeted compounds at concentrations above the laboratory reporting limits. Semi-volatile organic compounds (SVOCs) were not detected at concentrations above the laboratory reporting limits in the groundwater samples collected. Ammonia was detected in groundwater samples GW-1 and GW-5 at concentrations of 310 ug/L and 110 ug/L, respectively, which is below the NC2LGWQS of 1,500 ug/L. Ammonia was not detected at concentrations above the laboratory reporting limits in the remaining groundwater samples collected. The June 28, 2018 Phase I Environmental Site Assessment Report and the August 23, 2018 Report of Environmental Assessment were provided to the NCBP. On November 7, 2018, personnel from the NCBP, ECS, and 2151 Hawkins, LLC met on site to discuss possible data gaps in previous environmental assessment activities. During the November 7, 2018, meeting NCBP indicated that the following data gaps exist:  There is insufficient data on groundwater chemistry with respect to Resource Conservation and Recovery Act (RCRA) metals, nitrate, and ammonia.  There is insufficient data regarding the groundwater flow directions across the subject property.  There is insufficient data with respect to the possible presence of VOCS, SVOCs, RCRA metals, nitrate, and ammonia in shallow unsaturated soil at the subject property.  There is insufficient data with respect to the background concentrations of RCRA Metals in shallow unsaturated soils soil at or near the subject property.  There is insufficient data with respect to the possible presence of polychlorinated biphenyls (PCBs) in shallow unsaturated soil at the subject property.  There is insufficient data regarding the potential for vapor intrusion into structures which may be constructed on the subject property.  There is insufficient data with respect to potential receptors and pathways near the subject property. On November 14, 2018, the NCBP forwarded a letter to 2151 Hawkins, LLC in which it requests additional assessment activities to address the aforementioned data gaps. In the letter, the NCBP also requested that soil and groundwater samples be analyzed for VOCs and SVOCs and groundwater samples be analyzed for nitrate and ammonia presumably to confirm the results reported in the August 23, 2018 Report of Environmental Assessment. On December 19, 2018, ECS submitted a work plan to NCBP to address its November 14, 2018 request for additional assessment. On December 20, 2018, NCBP provided comments regarding the work plan. ECS submitted a revised work plan on December 28, 2019 which was approved by NCBP on December 31, 2018. ECS implemented the revised work plan dated December 28, 2018. Field work was performed in January and February 2019 and is summarized in a report titled Report of Environmental Assessment dated February 27, 2019. During the assessment samples of soil, groundwater, and sub-slab soil gas were Report of Additional Assessment 2151 Hawkins Street Property ECS Project No. 49-7172-E April 17, 2019 5 collected and analyzed. Several metals were detected in soil samples at concentrations above preliminary soil remediation goals (PSRGs). Several VOCs were detected in groundwater samples at concentrations above NC2LGWQS and TCE was detected at a concentration (56.2 µg/L) above non–residential vapor intrusion screening levels (VISLs) (4.4 µg/L) in samples collected from one monitoring well (MW-3). Several VOCs were detected in sub-slab soil gas samples and TCE was detected at a concentration (10,600 micrograms per cubic meter [µg/m3]) above its associated non-residential VISL (180 µg/m3) in a sample collected from one sub-slab soil gas sampling point (SS-3). Information regarding the detections of VOCs in soil, groundwater and sub-slab soil gas was provided to NCBP as the project progressed. After receiving the Report of Environmental Assessment dated February 27, 2019, the NCBP requested that additional assessment activities be performed. On March 6, 2019, ECS submitted a work plan for indoor air sampling and additional sub-slab soil gas sampling. On March 7, 2019, the NCBP approved the work plan. 2.0 SCOPE OF SERVICES The environmental assessment consisted of collecting seven indoor air samples and one sub-slab gas samples. Sampling activities were conducted on March 16, 2019. 2.1 Soil Gas/Indoor Air Sampling Activities One sub-slab soil gas sample (SS-3R) and seven indoor air samples (IA-1 through IA-7) were collected at the subject site. The sub-slab soil gas sample was collected at sample point SS-3 which had been installed on February 9, 2019 along with three other sample points. The sub-slab soil gas sample points were completed as flush-to-grade VaporPins® with stainless steel hose barbs set in a recessed platform with the concrete slab. The sub-slab soil gas sample locations are shown on Figure 3. The indoor air samples were collected at various locations throughout the building. The indoor air sample locations are shown on Figure 4. A sample train consisting of non-reactive tubing and micro-valves was connected to the VaporPin® at sample point SS-3 and to a 1-liter Summa canister. A shut-in test was performed to confirm that leaks were not present in the sampling train. A micro-valve at the connection between the sampling train and the VaporPin® was closed and a vacuum was applied to the sampling train using a disposable syringe. The vacuum gauge on the Summa canister was monitored for declining vacuum indicative of a leak. If a leak was indicated, ECS took steps to eliminate the leak and repeated the test until no leaks were indicated. A helium shroud leak test was performed at the SS-3 sample location as a quality assurance control measure to confirm the integrity of the probe seal during the previous sampling event performed on February 14, 2019. The leak test for sample point SS-3 was reported in the February 27, 2019 Report of Environmental Assessment and results indicated that test parameters were within acceptable ranges. After the leak test was completed, a vacuum syringe was used to remove three volumes of air from the sample tubing prior to collection of the soil gas sample. Report of Additional Assessment 2151 Hawkins Street Property ECS Project No. 49-7172-E April 17, 2019 6 Following successful shut-in tests, ECS collected a soil gas sample from sample point SS-3. ECS designated this sample SS-3R. ECS utilized a 1-liter Summa canister from Pace. The canister was pre-cleaned and pre- evacuated so that it was under negative pressure (i.e., under vacuum). The initial vacuum on the canister was approximately 30 in-Hg. The canister was batch certified by the laboratory. The Summa canister was outfitted with a flow regulator set to 200 milliliters per minute and a vacuum gauge. To collect the sample, ECS opened the valve on the Summa canister and soil gas flowed into the canister. ECS noted the time the valve was opened and the initial vacuum. When the vacuum decreased to approximately 5 in-Hg, ECS shut the valve and recorded the time and final vacuum. ECS noted that the barometric pressure rose during the time when sampling was conducted between 1615 and 1708 on March 16, 2019. ECS noted at 1615 and 1708 on this date that the barometric pressure was 29.98 and 30.01 inches of mercury (in-Hg), respectively. Winds were reported to be 10 miles per hour (mph) at 1615 and 12 mph at 1708. Temperature was reported to be 49 and 48 degrees Fahrenheit at 1615 and 1708, respectively. Light rain and fog was reported at both 1615 and 1708 on this date. A printout from the webpage https://www.timeanddate.com/weather/usa/charlotte/historic showing weather observations on March 16, 2019 is included as Appendix A. The indoor air samples were collected, from a height of approximately 3.5 to 4.5 feet from the floor surface, using a 6-Liter Summa canister with a regulator preset to a flow rate of 0.0125 L/min for each canister. The vacuum was measured and recorded at the beginning and the end of the approximate 8- hour sampling cycle at each location. Following sample collection, the canisters were labeled and shipped to Pace Analytical Laboratory in Huntersville, North Carolina to be analyzed for VOCs using EPA Method TO-15. ECS maintained chain-of- custody (COC) procedures throughout the sample collection and transportation process. 3.0 RESULTS A summary of the laboratory analytical results for the soil gas and indoor air samples is provided on Table 1 and 2, respectively. Table 1 also shows the analytical results for the previous soil gas sample collected at SS-3 on February 14, 2019. Laboratory data sheets are included in Appendix B. Laboratory results for sub-slab soil gas sample SS-3R indicate detections of several VOCs above their respective method detection limits. Of these detections, the concentrations of TCE (47,600 ug/m3) exceeded both the residential and non-residential sub-slab soil gas VISLs (14 and 180 ug/m3, respectively). The concentrations of PCE (681 ug/m3) exceeded the residential sub-slab soil gas VISL (280 ug/m3). The concentrations of none of the other detected VOCs associated with sample SS-3R exceeded their respective residential or non-residential sub-slab soil gas VISLs. Laboratory analysis of the indoor air samples IA-1 and IA-2 detected several VOCS at concentrations below their respective residential and non-residential VISL. Laboratory analysis of the indoor air samples IA-3, IA-4, IA-5, IA-6 and IA-7 detected 1,2-dichloroethane (also known as ethylene dichloride or EDC) at concentrations of 2.4, 1.9, 3.8, 0.60, and 1.8 µg/m3 which is Report of Additional Assessment 2151 Hawkins Street Property ECS Project No. 49-7172-E April 17, 2019 7 above the non-residential VISL of 0.47 µg/m3 for this compound. Laboratory analysis of the indoor air sample IA-6 detected naphthalene at a concentration of 10.2 µg/m3 which is above the Non-Residential VISL of 0.36 µg/m3 for this compound. Several VOCS were detected in these samples at concentrations below their respective Residential VISLs. 4.0 DISCUSSION The concentrations of PCE associated with sub-slab soil gas sample point SS-3 increased from 114 to 681 µg/m3 between February 14, 2019 and March 17, 2019. The concentrations of TCE associated with sub- slab soil gas sample point SS-3 increased from 10,600 to 47,600 µg/m3 between February 14, 2019 and March 17, 2019. The increase indicates that subsurface conditions are dynamic. The compound, EDC, was not detected in sub-slab soil gas samples collected on February 14, 2019 or on March 17, 2019. This compound was detected in several indoor air samples at concentrations above residential and non-residential VISLs. The absence of this compound in sub-slab soil gas samples suggests that the source of this compound in indoor air is not sub-slab soil gas. Naphthalene was detected in sub-slab soil gas samples collected on February 14, 2019 or on March 17, 2019 at concentrations below both residential and non-residential VISLs. Naphthalene was detected in indoor air sample IA-6 at a concentration of 10.2 µg/m3 which is the above the residential and non- residential VISLs for indoor air (0.083 and 0.36 10.2 µg/m3, respectively). The fact that the naphthalene concentrations in sub-slab soil gas samples did not exceed VISLs suggests that the source of this compound in indoor air is not sub-slab soil gas. PCE was detected in the sub-slab soil gas sample from sample point SS-3 collected on March 17, 2019 at a concentration of 681 µg/m3 and above the residential VISL. PCE was detected in two of the seven indoor air samples (IA-6 and IA-7) collected on March 17, 2019 at estimated concentrations of 0.71 and 0.76 µg/m3, respectively. The concentration of PCE associated with indoor air is more than two orders of magnitude less than PCE concentrations associated with sub-slab soil gas and is below indoor air VISLs. This data suggests that vapor intrusion of PCE from sub-slab soil gas into indoor air at levels is not occurring at rates that pose health risks to persons working in the indoor air space based upon the health-based VISLs provided by NCDEQ. TCE was detected in the sub-slab soil gas samples from sample point SS-3 collected on February 14, 2019 and March 17, 2019 at concentrations of 10,600 and 47,600 µg/m3, respectively, and above the residential and non-residential VISLs. TCE was detected in three of the seven indoor air samples (IA-5, IA-6 and IA-7) collected on March 17, 2019 at estimated concentrations of 0.57, 0.85, and 0.79 µg/m3, respectively. The concentration of TCE associated with indoor air is more than three orders of magnitude less than TCE concentrations associated with sub-slab soil gas and below indoor air VISLs. This data suggests that vapor intrusion of TCE from sub-slab soil gas into indoor air at levels is not occurring at rates that pose health risks to persons working in the indoor air space based upon the health-based VISLs provided by NCDEQ. Report of Additional Assessment 2151 Hawkins Street Property ECS Project No. 49-7172-E April 17, 2019 8 5.0 CONCLUSIONS Based on the results of the environmental assessment, ECS concludes the following:  The detection of EDC in indoor air samples collected on March 17, 2019 is not related to vapor intrusion from sub-slab soil gas.  The detection of naphthalene in indoor air samples collected on March 17, 2019 is most likely not related to vapor intrusion from sub-slab soil gas.  The sub-slab soil gas and indoor air analytical data for samples collected on March 17, 2019 suggest that vapor intrusion of PCE and TCE was not posing a health risk for workers in the indoor air space on that date based upon the health-based VISLs provided by NCDEQ.  Conditions are dynamic and vapor intrusion issues may occur should the concentrations of VOCs in soil gas increase, the site be disrupted through construction activities, and/or the occurrence of seasonal variations in weather (including changes in temperature, barometric pressure, prevailing winds). 6.0 RECOMMENDATIONS Based on the results of the environmental assessment, ECS recommends the following:  ECS recommends that a vapor mitigation system be installed for the structure proposed to be constructed on the subject property.  ECS recommends that no further environmental assessment be performed on the subject property until after the proposed structure is under construction and then the recommended vapor mitigation system should be tested for efficiency.  Existing monitoring wells should be abandoned in accordance with North Carolina well construction standards.  Investigation derived wastes (IDW) which consist of drummed soil cuttings and development/purge groundwater should be disposed in accordance with North Carolina regulations and NCBP should be provided with documentation of the disposal.  A Brownfields environmental management plan (EMP) should be prepared and submitted to NCBP for approval. 7.0 QUALIFICATIONS OF REPORT The activities and evaluative approaches used in this assessment are consistent with those normally employed in environmental assessment projects of this type. Our evaluation of site conditions has been based on our understanding of the site project information and the data obtained during our field activities. This report was prepared for the express use of Portman Holdings and 2151 Hawkins, LLC. Use of this report by other individuals or companies implies their acceptance of the General Conditions of Service of the original contract. FIGURES SOURCE:USGS Topographic MapCharlotte East Quadrangle2016 SCALE:1-inch = 2,000 feet 1’2000’1000’ SITE FIGURE 1 SITE TOPOGRAPHIC MAP 2151 Hawkins, LLC 2151 Hawkins Street Charlotte, Mecklenburg County, North Carolina ECS Project Number 49-7172-E FIGURE 2SITE MAP 2151 Hawkins, LLC2151 Hawkins StreetCharlotte, Mecklenburg County, North Carolina ECS Project Number 49-7172-E SOURCE: GOOGLE EARTH, DATED 2017 SCALE: AS SHOWN APPROXIMATE SITE BOUNDARY LEGEND FIGURE 3 SUB-SLAB SOIL GAS SAMPLE LOCATION MAP 2151 Hawkins, LLC 2151 Hawkins Street Charlotte, Mecklenburg County, North Carolina ECS Project Number 49-7172-E SOURCE: PORTMAN HOLDINGS, INC. APPROXIMATE SCALE: 1 INCH = 80 FEET SB-1/GW-1 GW-4 SS-1 SUB SLAB SOIL GAS SAMPLE LOCATION (APPROXIMATE) LEGEND FIGURE 4 INDOOR AIR SAMPLE LOCATION MAP 2151 Hawkins, LLC 2151 Hawkins Street Charlotte, Mecklenburg County, North Carolina ECS Project Number 49-7172-E SOURCE: PORTMAN HOLDINGS, INC. APPROXIMATE SCALE: 1 INCH = 80 FEET SB-1/GW-1 GW-4 INDOOR AIR SAMPLE LOCATION (APPROXIMATE) LEGEND IA-6 IA-4 IA-3 IA-2 IA-1 IA-5 IA-7 TABLES 2151 Hawkins Steet, LLC Charlotte Oil & Fertilizer Works 2151 Hawkins Street, Charlotte, North Carolina ECS Project No. 49:7172-E Parameter Sample ID SS-3 SS-3R Sample Date 2/14/2019 3/17/2019 Acetone 61.7 52.7 2,700,000 220,000 Benzene 2.6 4.8 1,600 120 2-Butanone (MEK)54.6 8.6 440,000 35,000 Cyclohexane 1.2 J 2.2 J 530,000 42,000 Trichlorofluoromethane (F11)<0.84 1.4 J NS NS Dichlorodifluoromethane (F12)1.8 J 2.2 8,800 700 1,1-Dichloroethane 33.3 3.0 7,700 580 n-Heptane <0.87 <1.7 35,000 2,800n-Hexane 2.1 NA 61,000 4,900 2-Hexanone 2.7 J 2.2 J 2,600 210 Methylene Chloride 12.6 26.6 53,000 4,200 Naphthalene 11.3 6.7 260 21 Propylene <0.33 <0.74 260,000 21,000 cis-1,2-Dichloroethene 30.2 59.6 NS NStrans-1,2-Dichloroethene 67.8 120 NS NS Chloroform 23.8 53.3 530 41 1,1,1-Trichloroethane 19.5 33.8 440,000 35,000 1,2,4-Trimethylbenzene 2.7 2.6 5,300 420 1,3,5-Trimethylbenzene 0.95 J 2.1 J 5,300 420 Ethyl acetate 4.2 <1.5 6,100 490 Ethylbenzene 2.4 2.0 4,900 370 Toluene 52.1 27.0 440,000 35,000 Tetrachloroethene (PCE)114 681 3,500 280 Tetrahydrofuran 3.1 <1.3 180,000 14,000 Trichloroethene (TCE)10,600 47,600 180 14 Vinyl chloride <0.29 <0.55 2,800 56 m,p-Xylene 7.6 6.5 8,800 700 o-Xylene 2.6 <1.9 8,800 700 Styrene 1.8 J <1.8 J 88,000 7,000 Notes: Results presented in micrograms per cubic meter (µg/m3) NCDEQ-DWM = North Carolina Department of Environmental Quality-Division of Waste Management NCDEQ-DWM Residential and Non-Residential Vapor Intrusion Screening Concentrations are from update of February 2018 VISL= Vapor Intrusion Screening Levels NS = No Established Standard Underline = Concentration Exceeds Residential VISL BOLD = Concentration Exceeds Non-Residential VISL Volatile Organic Compounds (VOCs) by EPA TO-15 TABLE 1: SUMMARY OF SUB-SLAB SOIL GAS ANALYTICAL RESULTS ANALYTICAL RESULTS NCDEQ-DWM Non-Residential VISL (Exterior & sub-slab) NCDEQ-DWM Residential VISL (Exterior & sub- slab) 2151 Hawkins Steet, LLC Charlotte Oil & Fertilizer Works 2151 Hawkins Street, Charlotte, North Carolina ECS Project No. 49:7172-D Parameter Sample ID IA-1 IA-2 IA-3 IA-4 IA-5 IA-6 IA-7 Sample Date Acetone 290 7.7 19.5 21.3 53.2 34.9 24.1 27,000 2,200 Benzene 0.49 J 0.31 J <0.52 0.45 J 0.47 J 0.27 J 0.39 J 16 0.36 2-Butanone (MEK)1.2 J <4.8 0.81 J 1.3 J 0.87 J 0.96 J 1.4 J 4,400 1,000Cyclohexane <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 5,300 1,300 Trichlorofluoromethane (F11)1.3 J 1.7 J 1.7 J <1.8 1.8 J 1.6 J 1.6 J NS NSDichlorodifluoromethane (F12)2.4 2.6 2.9 2.7 2.6 2.8 2.8 88 21 1,2-Dichloroethane (EDC)<0.65 <0.66 2.4 1.9 3.8 0.60 J 1.8 0.47 0.11 n-Heptane <1.3 <1.3 <1.3 <1.3 <1.3 0.72 J <1.3 350 83 2-Hexanone <6.6 <6.7 <6.7 <6.6 <6.6 <6.7 <6.7 26 6.3 Methylene Chloride 3.9 J 3.4 J 3.5 J 3.9 J 7.9 3.7 J 4.5 J 530 100 Naphthalene <4.2 <4.3 <4.3 <4.2 <4.2 10.2 <4.3 0.36 0.083 Propylene <0.55 <0.56 <0.56 <0.55 <0.55 <0.56 <0.56 2,600 630 cis-1,2-Dichloroethene <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 NS NS trans-1,2-Dichloroethene <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 NS NS Chloroform <0.78 <0.80 <0.80 <0.78 <0.78 <0.80 <0.80 0.53 0.12 1,1,1-Trichloroethane <1.8 <1.8 <1.8 <1.8 <1.8 <1.8 <1.8 4,400 1,000 1,2,4-Trimethylbenzene <1.6 <1.6 <1.6 <1.6 1.0 J 14.5 <1.6 53 13 1,3,5-Trimethylbenzene <1.6 <1.6 <1.6 <1.6 <1.6 3.9 <1.6 53 13 Ethyl acetate 1.5 <1.2 <1.2 0.75 J 3.6 1.4 <1.2 61 15 Ethylbenzene <1.4 <1.4 1.2 J 0.82 J <1.4 1.4 J 1.2J 4.9 1.1 Toluene 1.5 1.4 3.2 2.0 3.1 2.9 2.2 4,400 1,000 Tetrachloroethene (PCE)<1.1 <1.1 <1.1 <1.1 <1.1 0.71 J 0.76 J 35 8.3 Tetrahydrofuran <0.95 <0.97 <0.97 <0.95 <0.95 <0.97 <0.97 1,800 420 Trichloroethene (TCE)<0.86 <0.88 <0.88 <0.86 0.57 J 0.85 J 0.79 J 1.8 0.42 Vinyl chloride <0.41 <0.42 <0.42 <0.41 <0.41 <0.42 <0.42 2.8 0 m,p-Xylene <2.8 <2.8 3.6 3.7 <2.8 5.4 4.0 88 21o-Xylene <1.4 <1.4 0.71 J 0.78 J <1.4 2.9 0.82 J 88 21 Styrene <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 880 210 Notes: Results presented in micrograms per cubic meter (µg/m3)NCDEQ-DWM = North Carolina Department of Environmental Quality-Division of Waste Management NCDEQ-DWM Residential and Non-Residential Vapor Intrusion Screening Concentrations are from update of February 2018VISL= Vapor Intrusion Screening Levels IASL (A) = Indoor Air/Crawlspace Screening Level at target risk 1.0E -06NS = No Established Standard Underline = Concentration Exceeds Residential VISL IASL (A) BOLD = Concentration Exceeds Non-Residential VISL IASL (A) Volatile Organic Compounds (VOCs) by EPA TO-15 2/14/2019 TABLE 2: SUMMARY OF INDOOR AIR ANALYTICAL RESULTS ANALYTICAL RESULTS NCDEQ-DWM Residential VISL IASL (A) NCDEQ-DWM Non-Residential VISL IASL (A) APPENDIX A APPENDIX B #=CL# March 25, 2019 LIMS USE: FR - JOE NESTOR LIMS OBJECT ID: 92421695 92421695 Project: Pace Project No.: RE: Joe Nestor ECS Southeast 1812 Center Park Drive Suite D Charlotte, NC 28217 Hawkins Dear Joe Nestor: Enclosed are the analytical results for sample(s) received by the laboratory on March 18, 2019. The results relate only to the samples included in this report. Results reported herein conform to the most current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where applicable, unless otherwise noted in the body of the report. If you have any questions concerning this report, please feel free to contact me. Sincerely, Taylor Ezell taylor.ezell@pacelabs.com Project Manager (704)875-9092 Enclosures REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 1 of 24 #=CP# CERTIFICATIONS Pace Project No.: Project: 92421695 Hawkins Minnesota Certification IDs 1700 Elm Street SE, Minneapolis, MN 55414-2485 A2LA Certification #: 2926.01 Alabama Certification #: 40770 Alaska Contaminated Sites Certification #: 17-009 Alaska DW Certification #: MN00064 Arizona Certification #: AZ0014 Arkansas DW Certification #: MN00064 Arkansas WW Certification #: 88-0680 California Certification #: 2929 CNMI Saipan Certification #: MP0003 Colorado Certification #: MN00064 Connecticut Certification #: PH-0256 EPA Region 8+Wyoming DW Certification #: via MN 027- 053-137 Florida Certification #: E87605 Georgia Certification #: 959 Guam EPA Certification #: MN00064 Hawaii Certification #: MN00064 Idaho Certification #: MN00064 Illinois Certification #: 200011 Indiana Certification #: C-MN-01 Iowa Certification #: 368 Kansas Certification #: E-10167 Kentucky DW Certification #: 90062 Kentucky WW Certification #: 90062 Louisiana DEQ Certification #: 03086 Louisiana DW Certification #: MN00064 Maine Certification #: MN00064 Maryland Certification #: 322 Massachusetts Certification #: M-MN064 Michigan Certification #: 9909 Minnesota Certification #: 027-053-137 Minnesota Dept of Ag Certifcation #: via MN 027-053-137 Minnesota Petrofund Certification #: 1240 Mississippi Certification #: MN00064 Missouri Certification #: 10100 Montana Certification #: CERT0092 Nebraska Certification #: NE-OS-18-06 Nevada Certification #: MN00064 New Hampshire Certification #: 2081 New Jersey Certification #: MN002 New York Certification #: 11647 North Carolina DW Certification #: 27700 North Carolina WW Certification #: 530 North Dakota Certification #: R-036 Ohio DW Certification #: 41244 Ohio VAP Certification #: CL101 Oklahoma Certification #: 9507 Oregon Primary Certification #: MN300001 Oregon Secondary Certification #: MN200001 Pennsylvania Certification #: 68-00563 Puerto Rico Certification #: MN00064 South Carolina Certification #:74003001 Tennessee Certification #: TN02818 Texas Certification #: T104704192 Utah Certification #: MN00064 Virginia Certification #: 460163 Washington Certification #: C486 West Virginia DEP Certification #: 382 West Virginia DW Certification #: 9952 C Wisconsin Certification #: 999407970 Wyoming UST Certification #: via A2LA 2926.01 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 2 of 24 #=SS# SAMPLE SUMMARY Pace Project No.: Project: 92421695 Hawkins Lab ID Sample ID Matrix Date Collected Date Received 92421695001 IA-1 Air 03/16/19 15:54 03/18/19 14:05 92421695002 IA-2 Air 03/16/19 15:55 03/18/19 14:05 92421695003 IA-3 Air 03/16/19 16:02 03/18/19 14:05 92421695004 IA-4 Air 03/16/19 16:05 03/18/19 14:05 92421695005 IA-5 Air 03/16/19 16:15 03/18/19 14:05 92421695006 IA-6 Air 03/16/19 16:20 03/18/19 14:05 92421695007 IA-7 Air 03/16/19 16:25 03/18/19 14:05 92421695008 SS-3R Air 03/16/19 16:35 03/18/19 14:05 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 3 of 24 #=SA# SAMPLE ANALYTE COUNT Pace Project No.: Project: 92421695 Hawkins Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 92421695001 IA-1 TO-15 30 PASI-MNCK 92421695002 IA-2 TO-15 30 PASI-MNCK 92421695003 IA-3 TO-15 30 PASI-MNCK 92421695004 IA-4 TO-15 30 PASI-MNCK 92421695005 IA-5 TO-15 30 PASI-MNCK 92421695006 IA-6 TO-15 30 PASI-MNCK 92421695007 IA-7 TO-15 30 PASI-MNCK 92421695008 SS-3R TO-15 30 PASI-MAFV, NCK REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 4 of 24 #=HO# SUMMARY OF DETECTION Pace Project No.: Project: 92421695 Hawkins Parameters AnalyzedResult Lab Sample ID Report Limit QualifiersUnitsMethod Client Sample ID 92421695001 IA-1 2-Butanone (MEK)1.2J ug/m3 03/23/19 22:254.7TO-15 Acetone 290 ug/m3 03/23/19 22:253.8TO-15 Benzene 0.49J ug/m3 03/23/19 22:250.51TO-15 Dichlorodifluoromethane 2.4 ug/m3 03/23/19 22:251.6TO-15 Ethyl acetate 1.5 ug/m3 03/23/19 22:251.2TO-15 Methylene Chloride 3.9J ug/m3 03/23/19 22:255.6TO-15 Toluene 1.5 ug/m3 03/23/19 22:251.2TO-15 Trichlorofluoromethane 1.3J ug/m3 03/23/19 22:251.8TO-15 92421695002 IA-2 Acetone 7.7 ug/m3 03/23/19 23:223.9TO-15 Benzene 0.31J ug/m3 03/23/19 23:220.52TO-15 Dichlorodifluoromethane 2.6 ug/m3 03/23/19 23:221.6TO-15 Methylene Chloride 3.4J ug/m3 03/23/19 23:225.7TO-15 Toluene 1.4 ug/m3 03/23/19 23:221.2TO-15 Trichlorofluoromethane 1.7J ug/m3 03/23/19 23:221.8TO-15 92421695003 IA-3 1,2-Dichloroethane 2.4 ug/m3 03/23/19 23:510.66TO-15 2-Butanone (MEK)0.81J ug/m3 03/23/19 23:514.8TO-15 Acetone 19.5 ug/m3 03/23/19 23:513.9TO-15 Dichlorodifluoromethane 2.9 ug/m3 03/23/19 23:511.6TO-15 Ethylbenzene 1.2J ug/m3 03/23/19 23:511.4TO-15 Methylene Chloride 3.5J ug/m3 03/23/19 23:515.7TO-15 Toluene 3.2 ug/m3 03/23/19 23:511.2TO-15 Trichlorofluoromethane 1.7J ug/m3 03/23/19 23:511.8TO-15 m&p-Xylene 3.6 ug/m3 03/23/19 23:512.8TO-15 o-Xylene 0.71J ug/m3 03/23/19 23:511.4TO-15 92421695004 IA-4 1,2-Dichloroethane 1.9 ug/m3 03/24/19 00:200.65TO-15 2-Butanone (MEK)1.3J ug/m3 03/24/19 00:204.7TO-15 Acetone 21.3 ug/m3 03/24/19 00:203.8TO-15 Benzene 0.45J ug/m3 03/24/19 00:200.51TO-15 Dichlorodifluoromethane 2.7 ug/m3 03/24/19 00:201.6TO-15 Ethyl acetate 0.75J ug/m3 03/24/19 00:201.2TO-15 Ethylbenzene 0.82J ug/m3 03/24/19 00:201.4TO-15 Methylene Chloride 3.9J ug/m3 03/24/19 00:205.6TO-15 Toluene 2.0 ug/m3 03/24/19 00:201.2TO-15 m&p-Xylene 3.7 ug/m3 03/24/19 00:202.8TO-15 o-Xylene 0.78J ug/m3 03/24/19 00:201.4TO-15 92421695005 IA-5 1,2,4-Trimethylbenzene 1.0J ug/m3 03/24/19 00:481.6TO-15 1,2-Dichloroethane 3.8 ug/m3 03/24/19 00:480.65TO-15 2-Butanone (MEK)0.87J ug/m3 03/24/19 00:484.7TO-15 Acetone 53.2 ug/m3 03/24/19 00:483.8TO-15 Benzene 0.47J ug/m3 03/24/19 00:480.51TO-15 Dichlorodifluoromethane 2.6 ug/m3 03/24/19 00:481.6TO-15 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 5 of 24 #=HO# SUMMARY OF DETECTION Pace Project No.: Project: 92421695 Hawkins Parameters AnalyzedResult Lab Sample ID Report Limit QualifiersUnitsMethod Client Sample ID 92421695005 IA-5 Ethyl acetate 3.6 ug/m3 03/24/19 00:481.2TO-15 Methylene Chloride 7.9 ug/m3 03/24/19 00:485.6TO-15 Toluene 3.1 ug/m3 03/24/19 00:481.2TO-15 Trichloroethene 0.57J ug/m3 03/24/19 00:480.86TO-15 Trichlorofluoromethane 1.8J ug/m3 03/24/19 00:481.8TO-15 92421695006 IA-6 1,2,4-Trimethylbenzene 14.5 ug/m3 03/24/19 01:171.6TO-15 1,2-Dichloroethane 0.60J ug/m3 03/24/19 01:170.66TO-15 1,3,5-Trimethylbenzene 3.9 ug/m3 03/24/19 01:171.6TO-15 2-Butanone (MEK)0.96J ug/m3 03/24/19 01:174.8TO-15 Acetone 34.9 ug/m3 03/24/19 01:173.9TO-15 Benzene 0.27J ug/m3 03/24/19 01:170.52TO-15 Dichlorodifluoromethane 2.8 ug/m3 03/24/19 01:171.6TO-15 Ethyl acetate 1.4 ug/m3 03/24/19 01:171.2TO-15 Ethylbenzene 1.4J ug/m3 03/24/19 01:171.4TO-15 Methylene Chloride 3.7J ug/m3 03/24/19 01:175.7TO-15 Naphthalene 10.2 ug/m3 03/24/19 01:174.3TO-15 Tetrachloroethene 0.71J ug/m3 03/24/19 01:171.1TO-15 Toluene 2.9 ug/m3 03/24/19 01:171.2TO-15 Trichloroethene 0.85J ug/m3 03/24/19 01:170.88TO-15 Trichlorofluoromethane 1.6J ug/m3 03/24/19 01:171.8TO-15 m&p-Xylene 5.4 ug/m3 03/24/19 01:172.8TO-15 n-Heptane 0.72J ug/m3 03/24/19 01:171.3TO-15 o-Xylene 2.9 ug/m3 03/24/19 01:171.4TO-15 92421695007 IA-7 1,2-Dichloroethane 1.8 ug/m3 03/24/19 01:460.66TO-15 2-Butanone (MEK)1.4J ug/m3 03/24/19 01:464.8TO-15 Acetone 24.1 ug/m3 03/24/19 01:463.9TO-15 Benzene 0.39J ug/m3 03/24/19 01:460.52TO-15 Dichlorodifluoromethane 2.8 ug/m3 03/24/19 01:461.6TO-15 Ethylbenzene 1.2J ug/m3 03/24/19 01:461.4TO-15 Methylene Chloride 4.5J ug/m3 03/24/19 01:465.7TO-15 Tetrachloroethene 0.76J ug/m3 03/24/19 01:461.1TO-15 Toluene 2.2 ug/m3 03/24/19 01:461.2TO-15 Trichloroethene 0.79J ug/m3 03/24/19 01:460.88TO-15 Trichlorofluoromethane 1.6J ug/m3 03/24/19 01:461.8TO-15 m&p-Xylene 4.0 ug/m3 03/24/19 01:462.8TO-15 o-Xylene 0.82J ug/m3 03/24/19 01:461.4TO-15 92421695008 SS-3R 1,1,1-Trichloroethane 33.8 ug/m3 03/24/19 02:142.3TO-15 1,1-Dichloroethane 3.0 ug/m3 03/24/19 02:141.7TO-15 1,1-Dichloroethene 57.4 ug/m3 03/24/19 02:141.7TO-15 1,2,4-Trimethylbenzene 2.6 ug/m3 03/24/19 02:142.1TO-15 1,3,5-Trimethylbenzene 2.1J ug/m3 03/24/19 02:142.1TO-15 2-Butanone (MEK)8.6 ug/m3 03/24/19 02:146.3TO-15 2-Hexanone 2.2J ug/m3 03/24/19 02:148.7TO-15 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 6 of 24 #=HO# SUMMARY OF DETECTION Pace Project No.: Project: 92421695 Hawkins Parameters AnalyzedResult Lab Sample ID Report Limit QualifiersUnitsMethod Client Sample ID 92421695008 SS-3R Acetone 52.7 ug/m3 03/24/19 02:145.1TO-15 Benzene 4.8 ug/m3 03/24/19 02:140.68TO-15 Chloroform 53.3 ug/m3 03/24/19 02:141.0TO-15 Cyclohexane 2.2J ug/m3 03/24/19 02:143.7TO-15 Dichlorodifluoromethane 2.2 ug/m3 03/24/19 02:142.1TO-15 Ethylbenzene 2.0 ug/m3 03/24/19 02:141.9TO-15 Methylene Chloride 26.6 ug/m3 03/24/19 02:147.4TO-15 Naphthalene 6.7 ug/m3 03/24/19 02:145.6TO-15 Tetrachloroethene 681 ug/m3 03/24/19 02:14 E1.4TO-15 Toluene 27.0 ug/m3 03/24/19 02:141.6TO-15 Trichloroethene 47600 ug/m3 03/25/19 02:112940TO-15 Trichlorofluoromethane 1.4J ug/m3 03/24/19 02:142.4TO-15 cis-1,2-Dichloroethene 59.6 ug/m3 03/24/19 02:141.7TO-15 m&p-Xylene 6.5 ug/m3 03/24/19 02:143.7TO-15 o-Xylene 3.1 ug/m3 03/24/19 02:141.9TO-15 trans-1,2-Dichloroethene 120 ug/m3 03/24/19 02:141.7TO-15 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 7 of 24 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92421695 Hawkins Sample:IA-1 Lab ID:92421695001 Collected:03/16/19 15:54 Received:03/18/19 14:05 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: TO-15TO15 MSV AIR 1,1,1-Trichloroethane ND ug/m3 03/23/19 22:25 71-55-61.8 0.49 1.58 1,1-Dichloroethane ND ug/m3 03/23/19 22:25 75-34-31.3 0.36 1.58 1,1-Dichloroethene ND ug/m3 03/23/19 22:25 75-35-41.3 0.43 1.58 1,2,4-Trimethylbenzene ND ug/m3 03/23/19 22:25 95-63-61.6 0.71 1.58 1,2-Dichloroethane ND ug/m3 03/23/19 22:25 107-06-20.65 0.24 1.58 1,3,5-Trimethylbenzene ND ug/m3 03/23/19 22:25 108-67-81.6 0.63 1.58 2-Butanone (MEK)1.2J ug/m3 03/23/19 22:25 78-93-34.7 0.58 1.58 2-Hexanone ND ug/m3 03/23/19 22:25 591-78-66.6 1.2 1.58 Acetone 290 ug/m3 03/23/19 22:25 67-64-13.8 1.9 1.58 Benzene 0.49J ug/m3 03/23/19 22:25 71-43-20.51 0.24 1.58 Chloroform ND ug/m3 03/23/19 22:25 67-66-30.78 0.31 1.58 Cyclohexane ND ug/m3 03/23/19 22:25 110-82-72.8 0.56 1.58 Dichlorodifluoromethane 2.4 ug/m3 03/23/19 22:25 75-71-81.6 0.46 1.58 Ethyl acetate 1.5 ug/m3 03/23/19 22:25 141-78-61.2 0.30 1.58 Ethylbenzene ND ug/m3 03/23/19 22:25 100-41-41.4 0.48 1.58 Methylene Chloride 3.9J ug/m3 03/23/19 22:25 75-09-25.6 1.5 1.58 Naphthalene ND ug/m3 03/23/19 22:25 91-20-34.2 2.1 1.58 Propylene ND ug/m3 03/23/19 22:25 115-07-10.55 0.23 1.58 Styrene ND ug/m3 03/23/19 22:25 100-42-51.4 0.54 1.58 Tetrachloroethene ND ug/m3 03/23/19 22:25 127-18-41.1 0.50 1.58 Tetrahydrofuran ND ug/m3 03/23/19 22:25 109-99-90.95 0.41 1.58 Toluene 1.5 ug/m3 03/23/19 22:25 108-88-31.2 0.55 1.58 Trichloroethene ND ug/m3 03/23/19 22:25 79-01-60.86 0.41 1.58 Trichlorofluoromethane 1.3J ug/m3 03/23/19 22:25 75-69-41.8 0.58 1.58 Vinyl chloride ND ug/m3 03/23/19 22:25 75-01-40.41 0.20 1.58 cis-1,2-Dichloroethene ND ug/m3 03/23/19 22:25 156-59-21.3 0.35 1.58 m&p-Xylene ND ug/m3 03/23/19 22:25 179601-23-12.8 1.1 1.58 n-Heptane ND ug/m3 03/23/19 22:25 142-82-51.3 0.60 1.58 o-Xylene ND ug/m3 03/23/19 22:25 95-47-61.4 0.54 1.58 trans-1,2-Dichloroethene ND ug/m3 03/23/19 22:25 156-60-51.3 0.45 1.58 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 8 of 24 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92421695 Hawkins Sample:IA-2 Lab ID:92421695002 Collected:03/16/19 15:55 Received:03/18/19 14:05 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: TO-15TO15 MSV AIR 1,1,1-Trichloroethane ND ug/m3 03/23/19 23:22 71-55-61.8 0.50 1.61 1,1-Dichloroethane ND ug/m3 03/23/19 23:22 75-34-31.3 0.36 1.61 1,1-Dichloroethene ND ug/m3 03/23/19 23:22 75-35-41.3 0.44 1.61 1,2,4-Trimethylbenzene ND ug/m3 03/23/19 23:22 95-63-61.6 0.73 1.61 1,2-Dichloroethane ND ug/m3 03/23/19 23:22 107-06-20.66 0.24 1.61 1,3,5-Trimethylbenzene ND ug/m3 03/23/19 23:22 108-67-81.6 0.64 1.61 2-Butanone (MEK)ND ug/m3 03/23/19 23:22 78-93-34.8 0.59 1.61 2-Hexanone ND ug/m3 03/23/19 23:22 591-78-66.7 1.2 1.61 Acetone 7.7 ug/m3 03/23/19 23:22 67-64-13.9 1.9 1.61 Benzene 0.31J ug/m3 03/23/19 23:22 71-43-20.52 0.25 1.61 Chloroform ND ug/m3 03/23/19 23:22 67-66-30.80 0.32 1.61 Cyclohexane ND ug/m3 03/23/19 23:22 110-82-72.8 0.57 1.61 Dichlorodifluoromethane 2.6 ug/m3 03/23/19 23:22 75-71-81.6 0.47 1.61 Ethyl acetate ND ug/m3 03/23/19 23:22 141-78-61.2 0.31 1.61 Ethylbenzene ND ug/m3 03/23/19 23:22 100-41-41.4 0.49 1.61 Methylene Chloride 3.4J ug/m3 03/23/19 23:22 75-09-25.7 1.5 1.61 Naphthalene ND ug/m3 03/23/19 23:22 91-20-34.3 2.1 1.61 Propylene ND ug/m3 03/23/19 23:22 115-07-10.56 0.23 1.61 Styrene ND ug/m3 03/23/19 23:22 100-42-51.4 0.55 1.61 Tetrachloroethene ND ug/m3 03/23/19 23:22 127-18-41.1 0.51 1.61 Tetrahydrofuran ND ug/m3 03/23/19 23:22 109-99-90.97 0.42 1.61 Toluene 1.4 ug/m3 03/23/19 23:22 108-88-31.2 0.57 1.61 Trichloroethene ND ug/m3 03/23/19 23:22 79-01-60.88 0.41 1.61 Trichlorofluoromethane 1.7J ug/m3 03/23/19 23:22 75-69-41.8 0.59 1.61 Vinyl chloride ND ug/m3 03/23/19 23:22 75-01-40.42 0.20 1.61 cis-1,2-Dichloroethene ND ug/m3 03/23/19 23:22 156-59-21.3 0.35 1.61 m&p-Xylene ND ug/m3 03/23/19 23:22 179601-23-12.8 1.1 1.61 n-Heptane ND ug/m3 03/23/19 23:22 142-82-51.3 0.61 1.61 o-Xylene ND ug/m3 03/23/19 23:22 95-47-61.4 0.55 1.61 trans-1,2-Dichloroethene ND ug/m3 03/23/19 23:22 156-60-51.3 0.46 1.61 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 9 of 24 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92421695 Hawkins Sample:IA-3 Lab ID:92421695003 Collected:03/16/19 16:02 Received:03/18/19 14:05 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: TO-15TO15 MSV AIR 1,1,1-Trichloroethane ND ug/m3 03/23/19 23:51 71-55-61.8 0.50 1.61 1,1-Dichloroethane ND ug/m3 03/23/19 23:51 75-34-31.3 0.36 1.61 1,1-Dichloroethene ND ug/m3 03/23/19 23:51 75-35-41.3 0.44 1.61 1,2,4-Trimethylbenzene ND ug/m3 03/23/19 23:51 95-63-61.6 0.73 1.61 1,2-Dichloroethane 2.4 ug/m3 03/23/19 23:51 107-06-20.66 0.24 1.61 1,3,5-Trimethylbenzene ND ug/m3 03/23/19 23:51 108-67-81.6 0.64 1.61 2-Butanone (MEK)0.81J ug/m3 03/23/19 23:51 78-93-34.8 0.59 1.61 2-Hexanone ND ug/m3 03/23/19 23:51 591-78-66.7 1.2 1.61 Acetone 19.5 ug/m3 03/23/19 23:51 67-64-13.9 1.9 1.61 Benzene ND ug/m3 03/23/19 23:51 71-43-20.52 0.25 1.61 Chloroform ND ug/m3 03/23/19 23:51 67-66-30.80 0.32 1.61 Cyclohexane ND ug/m3 03/23/19 23:51 110-82-72.8 0.57 1.61 Dichlorodifluoromethane 2.9 ug/m3 03/23/19 23:51 75-71-81.6 0.47 1.61 Ethyl acetate ND ug/m3 03/23/19 23:51 141-78-61.2 0.31 1.61 Ethylbenzene 1.2J ug/m3 03/23/19 23:51 100-41-41.4 0.49 1.61 Methylene Chloride 3.5J ug/m3 03/23/19 23:51 75-09-25.7 1.5 1.61 Naphthalene ND ug/m3 03/23/19 23:51 91-20-34.3 2.1 1.61 Propylene ND ug/m3 03/23/19 23:51 115-07-10.56 0.23 1.61 Styrene ND ug/m3 03/23/19 23:51 100-42-51.4 0.55 1.61 Tetrachloroethene ND ug/m3 03/23/19 23:51 127-18-41.1 0.51 1.61 Tetrahydrofuran ND ug/m3 03/23/19 23:51 109-99-90.97 0.42 1.61 Toluene 3.2 ug/m3 03/23/19 23:51 108-88-31.2 0.57 1.61 Trichloroethene ND ug/m3 03/23/19 23:51 79-01-60.88 0.41 1.61 Trichlorofluoromethane 1.7J ug/m3 03/23/19 23:51 75-69-41.8 0.59 1.61 Vinyl chloride ND ug/m3 03/23/19 23:51 75-01-40.42 0.20 1.61 cis-1,2-Dichloroethene ND ug/m3 03/23/19 23:51 156-59-21.3 0.35 1.61 m&p-Xylene 3.6 ug/m3 03/23/19 23:51 179601-23-12.8 1.1 1.61 n-Heptane ND ug/m3 03/23/19 23:51 142-82-51.3 0.61 1.61 o-Xylene 0.71J ug/m3 03/23/19 23:51 95-47-61.4 0.55 1.61 trans-1,2-Dichloroethene ND ug/m3 03/23/19 23:51 156-60-51.3 0.46 1.61 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 10 of 24 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92421695 Hawkins Sample:IA-4 Lab ID:92421695004 Collected:03/16/19 16:05 Received:03/18/19 14:05 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: TO-15TO15 MSV AIR 1,1,1-Trichloroethane ND ug/m3 03/24/19 00:20 71-55-61.8 0.49 1.58 1,1-Dichloroethane ND ug/m3 03/24/19 00:20 75-34-31.3 0.36 1.58 1,1-Dichloroethene ND ug/m3 03/24/19 00:20 75-35-41.3 0.43 1.58 1,2,4-Trimethylbenzene ND ug/m3 03/24/19 00:20 95-63-61.6 0.71 1.58 1,2-Dichloroethane 1.9 ug/m3 03/24/19 00:20 107-06-20.65 0.24 1.58 1,3,5-Trimethylbenzene ND ug/m3 03/24/19 00:20 108-67-81.6 0.63 1.58 2-Butanone (MEK)1.3J ug/m3 03/24/19 00:20 78-93-34.7 0.58 1.58 2-Hexanone ND ug/m3 03/24/19 00:20 591-78-66.6 1.2 1.58 Acetone 21.3 ug/m3 03/24/19 00:20 67-64-13.8 1.9 1.58 Benzene 0.45J ug/m3 03/24/19 00:20 71-43-20.51 0.24 1.58 Chloroform ND ug/m3 03/24/19 00:20 67-66-30.78 0.31 1.58 Cyclohexane ND ug/m3 03/24/19 00:20 110-82-72.8 0.56 1.58 Dichlorodifluoromethane 2.7 ug/m3 03/24/19 00:20 75-71-81.6 0.46 1.58 Ethyl acetate 0.75J ug/m3 03/24/19 00:20 141-78-61.2 0.30 1.58 Ethylbenzene 0.82J ug/m3 03/24/19 00:20 100-41-41.4 0.48 1.58 Methylene Chloride 3.9J ug/m3 03/24/19 00:20 75-09-25.6 1.5 1.58 Naphthalene ND ug/m3 03/24/19 00:20 91-20-34.2 2.1 1.58 Propylene ND ug/m3 03/24/19 00:20 115-07-10.55 0.23 1.58 Styrene ND ug/m3 03/24/19 00:20 100-42-51.4 0.54 1.58 Tetrachloroethene ND ug/m3 03/24/19 00:20 127-18-41.1 0.50 1.58 Tetrahydrofuran ND ug/m3 03/24/19 00:20 109-99-90.95 0.41 1.58 Toluene 2.0 ug/m3 03/24/19 00:20 108-88-31.2 0.55 1.58 Trichloroethene ND ug/m3 03/24/19 00:20 79-01-60.86 0.41 1.58 Trichlorofluoromethane ND ug/m3 03/24/19 00:20 75-69-41.8 0.58 1.58 Vinyl chloride ND ug/m3 03/24/19 00:20 75-01-40.41 0.20 1.58 cis-1,2-Dichloroethene ND ug/m3 03/24/19 00:20 156-59-21.3 0.35 1.58 m&p-Xylene 3.7 ug/m3 03/24/19 00:20 179601-23-12.8 1.1 1.58 n-Heptane ND ug/m3 03/24/19 00:20 142-82-51.3 0.60 1.58 o-Xylene 0.78J ug/m3 03/24/19 00:20 95-47-61.4 0.54 1.58 trans-1,2-Dichloroethene ND ug/m3 03/24/19 00:20 156-60-51.3 0.45 1.58 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 11 of 24 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92421695 Hawkins Sample:IA-5 Lab ID:92421695005 Collected:03/16/19 16:15 Received:03/18/19 14:05 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: TO-15TO15 MSV AIR 1,1,1-Trichloroethane ND ug/m3 03/24/19 00:48 71-55-61.8 0.49 1.58 1,1-Dichloroethane ND ug/m3 03/24/19 00:48 75-34-31.3 0.36 1.58 1,1-Dichloroethene ND ug/m3 03/24/19 00:48 75-35-41.3 0.43 1.58 1,2,4-Trimethylbenzene 1.0J ug/m3 03/24/19 00:48 95-63-61.6 0.71 1.58 1,2-Dichloroethane 3.8 ug/m3 03/24/19 00:48 107-06-20.65 0.24 1.58 1,3,5-Trimethylbenzene ND ug/m3 03/24/19 00:48 108-67-81.6 0.63 1.58 2-Butanone (MEK)0.87J ug/m3 03/24/19 00:48 78-93-34.7 0.58 1.58 2-Hexanone ND ug/m3 03/24/19 00:48 591-78-66.6 1.2 1.58 Acetone 53.2 ug/m3 03/24/19 00:48 67-64-13.8 1.9 1.58 Benzene 0.47J ug/m3 03/24/19 00:48 71-43-20.51 0.24 1.58 Chloroform ND ug/m3 03/24/19 00:48 67-66-30.78 0.31 1.58 Cyclohexane ND ug/m3 03/24/19 00:48 110-82-72.8 0.56 1.58 Dichlorodifluoromethane 2.6 ug/m3 03/24/19 00:48 75-71-81.6 0.46 1.58 Ethyl acetate 3.6 ug/m3 03/24/19 00:48 141-78-61.2 0.30 1.58 Ethylbenzene ND ug/m3 03/24/19 00:48 100-41-41.4 0.48 1.58 Methylene Chloride 7.9 ug/m3 03/24/19 00:48 75-09-25.6 1.5 1.58 Naphthalene ND ug/m3 03/24/19 00:48 91-20-34.2 2.1 1.58 Propylene ND ug/m3 03/24/19 00:48 115-07-10.55 0.23 1.58 Styrene ND ug/m3 03/24/19 00:48 100-42-51.4 0.54 1.58 Tetrachloroethene ND ug/m3 03/24/19 00:48 127-18-41.1 0.50 1.58 Tetrahydrofuran ND ug/m3 03/24/19 00:48 109-99-90.95 0.41 1.58 Toluene 3.1 ug/m3 03/24/19 00:48 108-88-31.2 0.55 1.58 Trichloroethene 0.57J ug/m3 03/24/19 00:48 79-01-60.86 0.41 1.58 Trichlorofluoromethane 1.8J ug/m3 03/24/19 00:48 75-69-41.8 0.58 1.58 Vinyl chloride ND ug/m3 03/24/19 00:48 75-01-40.41 0.20 1.58 cis-1,2-Dichloroethene ND ug/m3 03/24/19 00:48 156-59-21.3 0.35 1.58 m&p-Xylene ND ug/m3 03/24/19 00:48 179601-23-12.8 1.1 1.58 n-Heptane ND ug/m3 03/24/19 00:48 142-82-51.3 0.60 1.58 o-Xylene ND ug/m3 03/24/19 00:48 95-47-61.4 0.54 1.58 trans-1,2-Dichloroethene ND ug/m3 03/24/19 00:48 156-60-51.3 0.45 1.58 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 12 of 24 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92421695 Hawkins Sample:IA-6 Lab ID:92421695006 Collected:03/16/19 16:20 Received:03/18/19 14:05 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: TO-15TO15 MSV AIR 1,1,1-Trichloroethane ND ug/m3 03/24/19 01:17 71-55-61.8 0.50 1.61 1,1-Dichloroethane ND ug/m3 03/24/19 01:17 75-34-31.3 0.36 1.61 1,1-Dichloroethene ND ug/m3 03/24/19 01:17 75-35-41.3 0.44 1.61 1,2,4-Trimethylbenzene 14.5 ug/m3 03/24/19 01:17 95-63-61.6 0.73 1.61 1,2-Dichloroethane 0.60J ug/m3 03/24/19 01:17 107-06-20.66 0.24 1.61 1,3,5-Trimethylbenzene 3.9 ug/m3 03/24/19 01:17 108-67-81.6 0.64 1.61 2-Butanone (MEK)0.96J ug/m3 03/24/19 01:17 78-93-34.8 0.59 1.61 2-Hexanone ND ug/m3 03/24/19 01:17 591-78-66.7 1.2 1.61 Acetone 34.9 ug/m3 03/24/19 01:17 67-64-13.9 1.9 1.61 Benzene 0.27J ug/m3 03/24/19 01:17 71-43-20.52 0.25 1.61 Chloroform ND ug/m3 03/24/19 01:17 67-66-30.80 0.32 1.61 Cyclohexane ND ug/m3 03/24/19 01:17 110-82-72.8 0.57 1.61 Dichlorodifluoromethane 2.8 ug/m3 03/24/19 01:17 75-71-81.6 0.47 1.61 Ethyl acetate 1.4 ug/m3 03/24/19 01:17 141-78-61.2 0.31 1.61 Ethylbenzene 1.4J ug/m3 03/24/19 01:17 100-41-41.4 0.49 1.61 Methylene Chloride 3.7J ug/m3 03/24/19 01:17 75-09-25.7 1.5 1.61 Naphthalene 10.2 ug/m3 03/24/19 01:17 91-20-34.3 2.1 1.61 Propylene ND ug/m3 03/24/19 01:17 115-07-10.56 0.23 1.61 Styrene ND ug/m3 03/24/19 01:17 100-42-51.4 0.55 1.61 Tetrachloroethene 0.71J ug/m3 03/24/19 01:17 127-18-41.1 0.51 1.61 Tetrahydrofuran ND ug/m3 03/24/19 01:17 109-99-90.97 0.42 1.61 Toluene 2.9 ug/m3 03/24/19 01:17 108-88-31.2 0.57 1.61 Trichloroethene 0.85J ug/m3 03/24/19 01:17 79-01-60.88 0.41 1.61 Trichlorofluoromethane 1.6J ug/m3 03/24/19 01:17 75-69-41.8 0.59 1.61 Vinyl chloride ND ug/m3 03/24/19 01:17 75-01-40.42 0.20 1.61 cis-1,2-Dichloroethene ND ug/m3 03/24/19 01:17 156-59-21.3 0.35 1.61 m&p-Xylene 5.4 ug/m3 03/24/19 01:17 179601-23-12.8 1.1 1.61 n-Heptane 0.72J ug/m3 03/24/19 01:17 142-82-51.3 0.61 1.61 o-Xylene 2.9 ug/m3 03/24/19 01:17 95-47-61.4 0.55 1.61 trans-1,2-Dichloroethene ND ug/m3 03/24/19 01:17 156-60-51.3 0.46 1.61 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 13 of 24 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92421695 Hawkins Sample:IA-7 Lab ID:92421695007 Collected:03/16/19 16:25 Received:03/18/19 14:05 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: TO-15TO15 MSV AIR 1,1,1-Trichloroethane ND ug/m3 03/24/19 01:46 71-55-61.8 0.50 1.61 1,1-Dichloroethane ND ug/m3 03/24/19 01:46 75-34-31.3 0.36 1.61 1,1-Dichloroethene ND ug/m3 03/24/19 01:46 75-35-41.3 0.44 1.61 1,2,4-Trimethylbenzene ND ug/m3 03/24/19 01:46 95-63-61.6 0.73 1.61 1,2-Dichloroethane 1.8 ug/m3 03/24/19 01:46 107-06-20.66 0.24 1.61 1,3,5-Trimethylbenzene ND ug/m3 03/24/19 01:46 108-67-81.6 0.64 1.61 2-Butanone (MEK)1.4J ug/m3 03/24/19 01:46 78-93-34.8 0.59 1.61 2-Hexanone ND ug/m3 03/24/19 01:46 591-78-66.7 1.2 1.61 Acetone 24.1 ug/m3 03/24/19 01:46 67-64-13.9 1.9 1.61 Benzene 0.39J ug/m3 03/24/19 01:46 71-43-20.52 0.25 1.61 Chloroform ND ug/m3 03/24/19 01:46 67-66-30.80 0.32 1.61 Cyclohexane ND ug/m3 03/24/19 01:46 110-82-72.8 0.57 1.61 Dichlorodifluoromethane 2.8 ug/m3 03/24/19 01:46 75-71-81.6 0.47 1.61 Ethyl acetate ND ug/m3 03/24/19 01:46 141-78-61.2 0.31 1.61 Ethylbenzene 1.2J ug/m3 03/24/19 01:46 100-41-41.4 0.49 1.61 Methylene Chloride 4.5J ug/m3 03/24/19 01:46 75-09-25.7 1.5 1.61 Naphthalene ND ug/m3 03/24/19 01:46 91-20-34.3 2.1 1.61 Propylene ND ug/m3 03/24/19 01:46 115-07-10.56 0.23 1.61 Styrene ND ug/m3 03/24/19 01:46 100-42-51.4 0.55 1.61 Tetrachloroethene 0.76J ug/m3 03/24/19 01:46 127-18-41.1 0.51 1.61 Tetrahydrofuran ND ug/m3 03/24/19 01:46 109-99-90.97 0.42 1.61 Toluene 2.2 ug/m3 03/24/19 01:46 108-88-31.2 0.57 1.61 Trichloroethene 0.79J ug/m3 03/24/19 01:46 79-01-60.88 0.41 1.61 Trichlorofluoromethane 1.6J ug/m3 03/24/19 01:46 75-69-41.8 0.59 1.61 Vinyl chloride ND ug/m3 03/24/19 01:46 75-01-40.42 0.20 1.61 cis-1,2-Dichloroethene ND ug/m3 03/24/19 01:46 156-59-21.3 0.35 1.61 m&p-Xylene 4.0 ug/m3 03/24/19 01:46 179601-23-12.8 1.1 1.61 n-Heptane ND ug/m3 03/24/19 01:46 142-82-51.3 0.61 1.61 o-Xylene 0.82J ug/m3 03/24/19 01:46 95-47-61.4 0.55 1.61 trans-1,2-Dichloroethene ND ug/m3 03/24/19 01:46 156-60-51.3 0.46 1.61 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 14 of 24 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92421695 Hawkins Sample:SS-3R Lab ID:92421695008 Collected:03/16/19 16:35 Received:03/18/19 14:05 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: TO-15TO15 MSV AIR 1,1,1-Trichloroethane 33.8 ug/m3 03/24/19 02:14 71-55-62.3 0.65 2.1 1,1-Dichloroethane 3.0 ug/m3 03/24/19 02:14 75-34-31.7 0.47 2.1 1,1-Dichloroethene 57.4 ug/m3 03/24/19 02:14 75-35-41.7 0.58 2.1 1,2,4-Trimethylbenzene 2.6 ug/m3 03/24/19 02:14 95-63-62.1 0.95 2.1 1,2-Dichloroethane ND ug/m3 03/24/19 02:14 107-06-20.86 0.32 2.1 1,3,5-Trimethylbenzene 2.1J ug/m3 03/24/19 02:14 108-67-82.1 0.84 2.1 2-Butanone (MEK)8.6 ug/m3 03/24/19 02:14 78-93-36.3 0.77 2.1 2-Hexanone 2.2J ug/m3 03/24/19 02:14 591-78-68.7 1.6 2.1 Acetone 52.7 ug/m3 03/24/19 02:14 67-64-15.1 2.5 2.1 Benzene 4.8 ug/m3 03/24/19 02:14 71-43-20.68 0.32 2.1 Chloroform 53.3 ug/m3 03/24/19 02:14 67-66-31.0 0.41 2.1 Cyclohexane 2.2J ug/m3 03/24/19 02:14 110-82-73.7 0.74 2.1 Dichlorodifluoromethane 2.2 ug/m3 03/24/19 02:14 75-71-82.1 0.62 2.1 Ethyl acetate ND ug/m3 03/24/19 02:14 141-78-61.5 0.40 2.1 Ethylbenzene 2.0 ug/m3 03/24/19 02:14 100-41-41.9 0.64 2.1 Methylene Chloride 26.6 ug/m3 03/24/19 02:14 75-09-27.4 2.0 2.1 Naphthalene 6.7 ug/m3 03/24/19 02:14 91-20-35.6 2.8 2.1 Propylene ND ug/m3 03/24/19 02:14 115-07-10.74 0.30 2.1 Styrene ND ug/m3 03/24/19 02:14 100-42-51.8 0.72 2.1 Tetrachloroethene 681 ug/m3 03/24/19 02:14 127-18-4 E1.4 0.66 2.1 Tetrahydrofuran ND ug/m3 03/24/19 02:14 109-99-91.3 0.55 2.1 Toluene 27.0 ug/m3 03/24/19 02:14 108-88-31.6 0.74 2.1 Trichloroethene 47600 ug/m3 03/25/19 02:11 79-01-6294013805376 Trichlorofluoromethane 1.4J ug/m3 03/24/19 02:14 75-69-42.4 0.77 2.1 Vinyl chloride ND ug/m3 03/24/19 02:14 75-01-40.55 0.26 2.1 cis-1,2-Dichloroethene 59.6 ug/m3 03/24/19 02:14 156-59-21.7 0.46 2.1 m&p-Xylene 6.5 ug/m3 03/24/19 02:14 179601-23-13.7 1.5 2.1 n-Heptane ND ug/m3 03/24/19 02:14 142-82-51.7 0.80 2.1 o-Xylene 3.1 ug/m3 03/24/19 02:14 95-47-61.9 0.72 2.1 trans-1,2-Dichloroethene 120 ug/m3 03/24/19 02:14 156-60-51.7 0.60 2.1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 15 of 24 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92421695 Hawkins Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 595368 TO-15 TO-15 TO15 MSV AIR Low Level Associated Lab Samples:92421695001, 92421695002, 92421695003, 92421695004, 92421695005, 92421695006, 92421695007, 92421695008 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:3218984 Associated Lab Samples:92421695001, 92421695002, 92421695003, 92421695004, 92421695005, 92421695006, 92421695007, 92421695008 Matrix:Air AnalyzedMDL 1,1,1-Trichloroethane ug/m3 ND 1.1 03/23/19 11:300.31 1,1-Dichloroethane ug/m3 ND 0.82 03/23/19 11:300.22 1,1-Dichloroethene ug/m3 ND 0.81 03/23/19 11:300.27 1,2,4-Trimethylbenzene ug/m3 ND 1.0 03/23/19 11:300.45 1,2-Dichloroethane ug/m3 ND 0.41 03/23/19 11:300.15 1,3,5-Trimethylbenzene ug/m3 ND 1.0 03/23/19 11:300.40 2-Butanone (MEK)ug/m3 ND 3.0 03/23/19 11:300.37 2-Hexanone ug/m3 ND 4.2 03/23/19 11:300.74 Acetone ug/m3 ND 2.4 03/23/19 11:301.2 Benzene ug/m3 ND 0.32 03/23/19 11:300.15 Chloroform ug/m3 ND 0.50 03/23/19 11:300.20 cis-1,2-Dichloroethene ug/m3 ND 0.81 03/23/19 11:300.22 Cyclohexane ug/m3 ND 1.8 03/23/19 11:300.35 Dichlorodifluoromethane ug/m3 ND 1.0 03/23/19 11:300.29 Ethyl acetate ug/m3 ND 0.73 03/23/19 11:300.19 Ethylbenzene ug/m3 ND 0.88 03/23/19 11:300.30 m&p-Xylene ug/m3 ND 1.8 03/23/19 11:300.70 Methylene Chloride ug/m3 ND 3.5 03/23/19 11:300.94 n-Heptane ug/m3 ND 0.83 03/23/19 11:300.38 Naphthalene ug/m3 ND 2.7 03/23/19 11:301.3 o-Xylene ug/m3 ND 0.88 03/23/19 11:300.34 Propylene ug/m3 ND 0.35 03/23/19 11:300.14 Styrene ug/m3 ND 0.87 03/23/19 11:300.34 Tetrachloroethene ug/m3 ND 0.69 03/23/19 11:300.31 Tetrahydrofuran ug/m3 ND 0.60 03/23/19 11:300.26 Toluene ug/m3 ND 0.77 03/23/19 11:300.35 trans-1,2-Dichloroethene ug/m3 ND 0.81 03/23/19 11:300.28 Trichloroethene ug/m3 ND 0.55 03/23/19 11:300.26 Trichlorofluoromethane ug/m3 ND 1.1 03/23/19 11:300.37 Vinyl chloride ug/m3 ND 0.26 03/23/19 11:300.13 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 3218985LABORATORY CONTROL SAMPLE: LCSSpike 1,1,1-Trichloroethane ug/m3 63.255.5 114 70-130 1,1-Dichloroethane ug/m3 46.141.1 112 70-130 1,1-Dichloroethene ug/m3 46.140.3 114 70-130 1,2,4-Trimethylbenzene ug/m3 63.750 127 70-134 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 16 of 24 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92421695 Hawkins Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 3218985LABORATORY CONTROL SAMPLE: LCSSpike 1,2-Dichloroethane ug/m3 45.441.1 110 70-130 1,3,5-Trimethylbenzene ug/m3 62.250 124 70-132 2-Butanone (MEK)ug/m3 34.430 115 70-130 2-Hexanone ug/m3 53.741.6 129 70-135 Acetone ug/m3 126121 105 67-130 Benzene ug/m3 36.232.5 112 70-130 Chloroform ug/m3 53.049.6 107 70-130 cis-1,2-Dichloroethene ug/m3 41.140.3 102 70-130 Cyclohexane ug/m3 40.035 114 68-132 Dichlorodifluoromethane ug/m3 55.150.3 110 70-130 Ethyl acetate ug/m3 42.336.6 115 69-130 Ethylbenzene ug/m3 52.544.1 119 67-131 m&p-Xylene ug/m3 10788.3 121 70-132 Methylene Chloride ug/m3 184177 104 65-130 n-Heptane ug/m3 45.841.7 110 65-130 Naphthalene ug/m3 57.753.3 108 56-130 o-Xylene ug/m3 51.244.1 116 70-130 Propylene ug/m3 20.217.5 116 67-130 Styrene ug/m3 55.043.3 127 69-136 Tetrachloroethene ug/m3 77.368.9 112 70-130 Tetrahydrofuran ug/m3 33.730 113 68-131 Toluene ug/m3 42.938.3 112 70-130 trans-1,2-Dichloroethene ug/m3 45.540.3 113 70-130 Trichloroethene ug/m3 57.954.6 106 70-130 Trichlorofluoromethane ug/m3 59.757.1 104 65-130 Vinyl chloride ug/m3 29.126 112 70-130 Parameter Units Dup Result Max RPD QualifiersRPDResult 92421695001 3219193SAMPLE DUPLICATE: 1,1,1-Trichloroethane ug/m3 ND 25ND 1,1-Dichloroethane ug/m3 ND 25ND 1,1-Dichloroethene ug/m3 ND 25ND 1,2,4-Trimethylbenzene ug/m3 ND 25ND 1,2-Dichloroethane ug/m3 ND 25ND 1,3,5-Trimethylbenzene ug/m3 ND 25ND 2-Butanone (MEK)ug/m3 0.85J 251.2J 2-Hexanone ug/m3 ND 25ND Acetone ug/m3 287 1 25290 Benzene ug/m3 0.55 250.49J Chloroform ug/m3 ND 25ND cis-1,2-Dichloroethene ug/m3 ND 25ND Cyclohexane ug/m3 ND 25ND Dichlorodifluoromethane ug/m3 3.1 R126252.4 Ethyl acetate ug/m3 1.9 21 251.5 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 17 of 24 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92421695 Hawkins Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units Dup Result Max RPD QualifiersRPDResult 92421695001 3219193SAMPLE DUPLICATE: Ethylbenzene ug/m3 ND 25ND m&p-Xylene ug/m3 ND 25ND Methylene Chloride ug/m3 3.8J 253.9J n-Heptane ug/m3 ND 25ND Naphthalene ug/m3 ND 25ND o-Xylene ug/m3 ND 25ND Propylene ug/m3 ND 25ND Styrene ug/m3 ND 25ND Tetrachloroethene ug/m3 ND 25ND Tetrahydrofuran ug/m3 ND 25ND Toluene ug/m3 1.7 12 251.5 trans-1,2-Dichloroethene ug/m3 ND 25ND Trichloroethene ug/m3 ND 25ND Trichlorofluoromethane ug/m3 1.3J 251.3J Vinyl chloride ug/m3 ND 25ND Parameter Units Dup Result Max RPD QualifiersRPDResult 10467590001 3219194SAMPLE DUPLICATE: 1,1,1-Trichloroethane ug/m3 ND 25ND 1,1-Dichloroethane ug/m3 ND 25ND 1,1-Dichloroethene ug/m3 ND 25ND 1,2,4-Trimethylbenzene ug/m3 ND 25ND 1,2-Dichloroethane ug/m3 ND 25ND 1,3,5-Trimethylbenzene ug/m3 ND 25ND 2-Butanone (MEK)ug/m3 1.6J 25ND 2-Hexanone ug/m3 ND 25ND Acetone ug/m3 14.9 4 2514.3 Benzene ug/m3 1.1 2 251.1 Chloroform ug/m3 ND 25ND cis-1,2-Dichloroethene ug/m3 ND 25ND Cyclohexane ug/m3 ND 25ND Dichlorodifluoromethane ug/m3 3.0 15 252.6 Ethyl acetate ug/m3 0.67J 25ND Ethylbenzene ug/m3 ND 25ND m&p-Xylene ug/m3 2.4J 25ND Methylene Chloride ug/m3 9.4 6 258.9 n-Heptane ug/m3 ND 25ND Naphthalene ug/m3 3.1J 25ND o-Xylene ug/m3 0.81J 25ND Propylene ug/m3 ND 25ND Styrene ug/m3 1.1J 25ND Tetrachloroethene ug/m3 ND 25ND Tetrahydrofuran ug/m3 ND 25ND Toluene ug/m3 4.4 4 254.3 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 18 of 24 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92421695 Hawkins Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units Dup Result Max RPD QualifiersRPDResult 10467590001 3219194SAMPLE DUPLICATE: trans-1,2-Dichloroethene ug/m3 ND 25ND Trichloroethene ug/m3 12.2 4 2511.7 Trichlorofluoromethane ug/m3 1.4J 25ND Vinyl chloride ug/m3 ND 25ND REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 19 of 24 #=QL# QUALIFIERS Pace Project No.: Project: 92421695 Hawkins DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean-Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. LABORATORIES Pace Analytical Services - MinneapolisPASI-M ANALYTE QUALIFIERS Analyte concentration exceeded the calibration range. The reported result is estimated.E RPD value was outside control limits.R1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 20 of 24 #=CR# QUALITY CONTROL DATA CROSS REFERENCE TABLE Pace Project No.: Project: 92421695 Hawkins Lab ID Sample ID QC Batch Method QC Batch Analytical Method Analytical Batch 92421695001 595368IA-1 TO-15 92421695002 595368IA-2 TO-15 92421695003 595368IA-3 TO-15 92421695004 595368IA-4 TO-15 92421695005 595368IA-5 TO-15 92421695006 595368IA-6 TO-15 92421695007 595368IA-7 TO-15 92421695008 595368SS-3R TO-15 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 03/25/2019 05:21 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 21 of 24 Page 22 of 24 Page 23 of 24 Page 24 of 24