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Home My WebLink About16022 CHT Brownfields Assessment WP-Approval DEQ Brownfields Assessment Work Plan Former CHT Facility 5046 Old Pineville Rd. Charlotte, North Carolina Brownfields Project ID 16022‐12‐60 December 18, 2013 H&H Job No. FDP-035 s:\aaa-master projects\forsite development partners (fdp)\fdp-035 cht old pineville rd\brownfields assessment\brownfields assessment wp.doc Brownfields Assessment Work Plan Former CHT Facility 5046 Old Pineville Rd. Charlotte, North Carolina H&H Job FDP-035 Table of Contents Section Page No. 1.0 Introduction and Background ........................................................................................... 1 1.1 Brief Site History .................................................................................................................. 1 1.2 Previous Assessment and Remedial Activities ..................................................................... 1 1.3 Brownfields .......................................................................................................................... 4 2.0 Scope of Work ..................................................................................................................... 5 2.1 Subslab Soil Vapor Assessment ........................................................................................... 5 2.3 Indoor Air Sampling (if warranted) ...................................................................................... 6 2.3 Reporting .............................................................................................................................. 8 Figures Figure 1 Site Map and Proposed Subslab Soil Vapor Sample Locations Tables Table 1 Summary of Shallow Groundwater Analytical Data i S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\Brownfields Assessment WP.doc Brownfields Assessment Work Plan Former CHT Facility 5046 Old Pineville Rd. Charlotte, North Carolina H&H Job FDP-035 1.0 Introduction and Background Hart & Hickman, PC (H&H) has prepared this Brownfields Assessment Work Plan for the former CHT R. Beitlich (CHT) facility located at 5046 Old Pineville Rd. in Charlotte, North Carolina. The facility consists of an approximate 73,300 square foot former manufacturing and warehousing facility located on approximately 4.15 acres of land. The facility is currently being used by several tenants for warehousing, equipment storage, and distribution. A site plan is included as Figure 1. 1.1 Brief Site History CHT (formerly known as Catawba Charlab) previously manufactured textile dyes, additives, and various chemicals at the site until 2010. Compounds used in the processes included primarily aromatics, petroleum-related hydrocarbons, and chloroaromatics. Raw materials were mixed, blended, and reacted into finished products primarily for use by the textile industry. Process wastewater was discharged to the sanitary sewer. 1.2 Previous Assessment and Remedial Activities There are two identified areas of soil and/or ground water impact at the facility. These two areas are referred to as 1) the former underground storage tank (UST) area, and 2) the M-2 Warehouse area. Each of these areas is discussed below. Former UST Area The former UST Area is located on the south side of the building in a gravel covered area along Rountree Rd. as indicated in Figure 1. Eleven underground storage tanks (USTs) were removed 1 S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\Brownfields Assessment WP.doc from this area in May and June 1991. Both petroleum and non-petroleum products were stored in these USTs. The former contents of the USTs included aromatic 150, isopropyl alcohol, varsol, paraffin solvent, mineral seal oil, xylene, butyl cellosolve, and fuel oil. Impacted soil was noted, and approximately 550 tons of impacted soil were removed at the time of UST closure. The presence of impacts in the area of the USTs was reported to DENR on May 17, 1991 and subsequent soil and ground water investigation was conducted. A Comprehensive Site Assessment (CSA) was submitted to the DENR UST Section in March 2003. The results indicated that shallow ground water flow at the site is generally toward the west and north- northwest. The results of soil sampling conducted indicated that there were no residual soil impacts present in the UST area above DENR UST Section Maximum Soil Contaminant Concentrations (MSCCs). The results of the ground water analyses indicated the presence of a small area of groundwater impacts in the western portion of the former UST area. The primary compounds of concern are xylenes and ethylbenzene. A summary of historical shallow ground water analytical data for the UST area wells is provided in Table 1. The most recent results indicate that only well MW-2 contained concentrations of ethylbenzene and xylenes above groundwater standards and the DENR Inactive Hazardous Sites Branch (IHSB) non-residential vapor intrusion screening levels. In 2003, concentrations of these compounds were also detected above the vapor intrusion screening levels in well MW-10 located downgradient of MW-2. However, concentrations were not detected above screening levels when MW-10 was sampled in 2008. M-2 Warehouse Area The M-2 Warehouse is located in the northeast portion of the site as indicated in Figure 1. Prior to construction of the M-2 Warehouse, this area of the site contained a former above ground chemical reactor and above ground petroleum storage vessels. Potential soil impacts in the area of the M-2 Warehouse area were discovered during geotechnical sampling conducted prior to construction of the M-2 Warehouse in 1992. Subsequent soil sampling conducted in 1992 2 S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\Brownfields Assessment WP.doc indicated the presence of total petroleum hydrocarbons (TPH). A monitoring well (MW-4) was installed prior to construction of the M-2 Warehouse and a ground water sample was collected in February 1992. The ground water sample contained volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOC) at concentrations above North Carolina ground water standards. Construction of the M-2 Warehouse was completed in 1992. In order to allow for construction of the M-2 Warehouse without delay, the sub-grade components of a soil vapor extraction (SVE) system consisting of two trenches and perforated piping were installed by Four Seasons Industrial Services beneath the M-2 Warehouse to be used in potential future soil remedial activities, if warranted. Monitoring well MW-4 was abandoned during construction of the M-2 Warehouse and additional wells (MW-5 and MW-6) were installed in the early 1990s. H&H conducted assessment activities between May 2002 and July 2003 which are documented in a Comprehensive Site Assessment (CSA) for the M-2 Warehouse dated July 2003. Specifically, soil samples were collected and analyzed during the installation of monitoring well MW-4A (the replacement well for MW-4), and ten soil borings were advanced below the warehouse The results indicated that 1,4-dichlorobenzene and 1,2,4-trichlorobenzene were detected in soil in one boring above the DENR IHSB commercial/industrial preliminary soil remediation goals. The results of the ground water analyses indicate the presence of a small area of ground water impact below and just north of the M-2 Warehouse. In August 2006, the DENR Aquifer Protection Section (APS) requested the submittal of a Corrective Action Plan (CAP) to address the identified soil and ground water impacts in the area of the M-2 Warehouse. The CAP was submitted to DENR in November 2006. The CAP included active remediation of soil below the M-2 Warehouse using the existing vapor extraction trench and natural attenuation of ground water impacts. In September 2009, CHT connected the extraction piping under the M-2 Warehouse to a SVE system. The SVE system was operated until the end of 2010 when it was 3 S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\Brownfields Assessment WP.doc shut down concurrently with shut down of the site buildings. A summary of historical ground water data is provided in Table 1. Compounds have been detected above North Carolina groundwater standards and the IHSB vapor intrusion screening levels in well MW-4A which is located below the M-2 Warehouse. The compounds which have been detected above the vapor intrusion screening levels are benzene, chlorobenzene, 1,4- dichlorobenzene, ethylbenzene, and 1,2,4-trichlorobenzene. 1.3 Brownfields In 2013, Old Pineville Investments, LLC submitted an eligibility application for entry into the Brownfields program, and the DENR Brownfields program subsequently indicated that the project was eligible. The purpose of the proposed assessment activities is to assess the potential for vapor intrusion into the site buildings from documented soil and groundwater impacts at the site. The proposed scope of work is provided in the following section. 4 S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\Brownfields Assessment WP.doc 2.0 Scope of Work 2.1 Subslab Soil Vapor Assessment To assess the potential for vapor intrusion into the site building from underlying soil and/or groundwater impacts, H&H proposes to collect six sub-slab soil vapor samples at the site. The proposed sub-slab soil vapor sample locations are indicated in Figure 1 and include the following: • One in the M-2 warehouse • One in the building area adjacent to MW-2 and downgradient of the UST area • One in the office area in the eastern part of the building • Three additional locations spaced throughout the remainder of the building areas At each sample location, H&H will drill through the concrete floor utilizing a concrete hammer drill and an approximate 1.5-inch diameter bit. Through each of the drilled holes, H&H will install an approximate 0.625-inch diameter stainless steel probe with approximate 2-inch long bottom screen point. The probes will be installed through the gravel beneath the concrete slab and seated in the underlying soil so that the soil gas probe screen is present in both the soil and overlying gravel. If no gravel is present beneath the slab at a sample location, the probe will be advanced no more than 6 inches below the bottom of the slab into soil. After pushing the screen point to the desired depth, the stainless steel screen of the point will be opened. Each point will then be sealed at the surface of the concrete slab using hydrated bentonite. The soil gas probes will be completed at the surface using a sample valve and Teflon tubing. Prior to sampling, a field leak check will be conducted at each vapor monitoring point by constructing a shroud around the sampling point and saturating the air within the shroud with helium gas. Using a syringe, a sample will be collected from the gas in the shroud into a Tedlar® bag and analyzed for helium concentrations using a helium gas detector. Vapor from the vapor monitoring point will be purged and sampled outside of the shroud into a separate Tedlar® bag 5 S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\Brownfields Assessment WP.doc and analyzed using the helium gas detector to ensure that helium concentrations are less than 5% of the helium concentrations in the shroud. Following a successful field leak check, vapor samples will be collected into six-liter Summa canisters for laboratory analysis. The Summa canisters will be allowed to fill slowly using an airflow regulator over a period of approximately one hour per point. During sampling at each location, a helium tracer gas atmosphere will be maintained at the surface of each soil vapor point to demonstrate that there was not short circuiting to the surface during the test. The helium gas atmosphere will be created by saturating the air within the shroud at the sample location with helium gas. To ensure a sufficient helium atmosphere was maintained during sampling, H&H will monitor helium levels within the shroud and add helium as needed to maintain an 80 to 90% helium atmosphere. A record of helium shroud measurements taken during the sampling activities will be maintained. As part of the testing, H&H will collect measurements of ambient temperature at the beginning, middle, and end of the sampling day. Precipitation, if any, will also be noted. Once the soil vapor samples are collected, the canisters will be shipped to a qualified laboratory and analyzed for VOCs by EPA Method TO-15 and for helium by EPA Method 3C. For VOC analysis, the laboratory will be asked to attain detection limits which are less than the DENR IHSB Non-Residential subslab soil vapor screening levels at a lifetime incremental cancer risk (LICR) of 1 x 10-6 for potential carcinogens and hazard index (HI) of 0.2 for non-carcinogens. After collection, each of the points will be abandoned and the surface will be patched. 2.2 Indoor Air Sampling (if warranted) Following collection and receipt of the subslab soil vapor sampling data, H&H will summarize the sample data in a table and provide it to DENR for review. If subslab soil sample concentrations are less than the DENR IHSB Non-Residential IHSB soil vapor screening levels, 6 S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\Brownfields Assessment WP.doc then indoor air sampling will not be warranted. However, if concentrations of compounds are detected significantly above screening levels, H&H will propose to DENR the locations and numbers of indoor air samples and the proposed analytes for review and approval. The indoor air samples will be collected with 6-liter Summa canisters. The Summa canister will be connected to an airflow regulator and a 3 ft long sampling cane in warehouse/open areas. The typical height of a Summa canister with an attached airflow regulator is approximately 2 ft above grade and, with the additional 3-foot long sampling cane, the sample intake point is approximately 5 ft above grade (typical breathing zone height). Sample heights in office areas will be approximately 3 ft above grade. Prior to sample collection, H&H will measure the wind direction and select an exterior background location which is located upgradient of the site building. The location of the background sample will be determined the day of the sampling based upon the wind direction. The background location Summa canister will also be fitted with a regulator and sampling cane so that the sample height is approximately 5 ft above ground level. Following set-up of the background sample canister, the indoor and background sample valves will be opened and the samples will be collected over an approximate 8-hour period (the regulator will be pre-set to collect samples over the 8-hour period). As part of the sampling effort, H&H will measure the air pressure differential between outside air and the interior sample locations near the start, middle, and end of the 8-hour sampling period. The pressure measurements will be made using a manometer sensitive to 0.01 inches water. In addition, exterior wind speed, exterior wind direction, and indoor/outdoor temperature will be recorded near the start, middle, and end of the sampling period. Precipitation will also be noted prior to and during the sampling event. The samples will be analyzed by EPA Method TO-15 (for the DENR agreed upon analytes based upon the soil vapor sampling), and the laboratory will be asked to attain detection limits which 7 S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\Brownfields Assessment WP.doc are less than the DENR IHSB Non-Residential indoor air screening levels for these compounds at a LICR of 1 x 10-6 for potential carcinogens and a HI of 0.2 for non-carcinogens. 2.3 Reporting Following completion of the activities, H&H will prepare a report which describes the methods and results of the sampling activities. The report will include the methods and results of the groundwater sampling, subslab soil vapor sampling, indoor air sampling (if performed), the locations of the samples, tabular summaries of the data in comparison to regulatory screening levels, boring logs, laboratory analytical reports, and conclusions concerning the activities. 8 S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\Brownfields Assessment WP.doc Table 1Summary of Shallow Groundwater Analytical Data Former CHT Facility Charlotte, NC H&H Job No. FDP-035 S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\CHT Tables for DENR.xlsCHT Tables for DENR.xls 12/18/2013 Table 1 Hart & Hickman, PC Sample ID MW-1 MW-2 GroundUnitsWater Sampling Date 5/9/2002 1/14/2003 8/2/2006 5/15/2008 5/9/2002 1/14/2003 8/2/2006 5/15/2008 5/9/2002 1/14/2003 10/13/2006 5/15/2008 1/8/2009 7/8/2009 2/25/2010 9/15/2010 8/1/2002 1/14/2003 10/13/2006 5/15/2008 1/8/2009 7/8/2009 2/25/2010 9/15/2010 Standard Method 6210D 6210D 8260 6210D 6210D 6210D 8260 6210D 601/602 6210D 8260 6210D 6200B 6200B 6200B 6200B 6210D 6210D 8260 6210D 6200B 6200B 6200B 6200B (µg/l) VOCs Benzene <1.0 <0.5 <1.00 <0.50 <500 <20 <1.00 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <50.0 <0.50 NS <50 110 120 110 67 420 730 Dry 1 69.3 Bromodichloromethane <1.0 0.54 <1.00 <1.0 <500 <20 <1.00 <100 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 <1.0 <50 <5.0 <20 <5.0 Dry 0.6 38.3 n-Butylbenzene <1.0 <0.5 <1.00 <0.50 <500 <20 <1.00 <50 <1.0 <0.5 <1.0 <1.0 <1.0 <1.0 <1.0 NS <50 <50 <1.0 <100 <10 <40 <10 Dry 70 NE sec-Butylbenzene <1.0 <0.5 <1.00 NA <500 <20 1.35 NA <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NS <0.50 <0.50 <0.50 <50 <5.0 <20 <5.0 Dry 70 NE tert-Butylbenzene <1.0 <0.5 <1.00 <0.50 <500 <20 <1.00 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NS <0.50 <0.50 <0.50 <50 <5.0 <20 <5.0 Dry 70 NE Chlorobenzene <1.0 <0.5 <1.00 <0.50 <500 <20 <1.00 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS 3,000 4,000 3,200 3,400 2,400 4,800 6,500 Dry 50 345 Chloroform <1.0 <0.5 <1.00 <0.50 <500 <20 2.80 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 <1.0 <50 <5.0 <20 <5.0 Dry 70 35.5 Chloromethane <1.0 <0.5 <1.00 <0.50 <500 <20 <1.00 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NS <0.50 <0.50 <0.50 <50 <5.0 <20 <5.0 Dry 3 219 1,2-Dichlorobenzene <1.0 <0.5 <1.00 <0.50 <500 <20 <1.00 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS 210 210 330 260 230 420 420 Dry 20 2,230 1,3-Dichlorobenzene <1.0 <0.5 <1.00 <0.50 <500 <20 <1.00 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS 280 120 290 220 300 340 360 Dry 200 NE 1,4-Dichlorobenzene <1.0 1.2 <1.00 <0.50 <500 <20 <1.00 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS 3,600 1,200 2,000 3,700 3,200 2,200 1,900 Dry 6 113 1,1-Dichloroethene <1.0 <0.5 <1.00 <0.50 <500 <20 <1.00 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 <50 <50 <5.0 <20 <5.0 Dry 7 164 cis-1,2-Dichloroethene <1.0 <0.5 <1.00 <0.50 <500 <20 <1.00 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 13 <50 16 <20 9.7 Dry 70 315* Ethylbenzene <1.0 <0.5 <1.00 69 24,000 22,000 35,200 32,000 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 920 510 130 82 710 790 Dry 600 152 Isopropylbenzene <1.0 <0.5 <1.00 1.3 <500 88 181 230 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 8.0 <50 19 <20 15 Dry 70 745 p-Isopropyltoluene <1.0 <0.5 <1.00 <2.0 <500 160 287 510 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 <1.0 <50 <5.0 <20 <5.0 Dry NE NE Naphthalene <1.0 <0.5 <1.00 <0.50 <500 <20 13.4 <50 <1.0 <0.5 <1.0 <2.0 <2.0 <2.0 <2.0 NS 50 <50 48 <200 39 <80 40 Dry 6 146 n-Proplybenzene <1.0 <0.5 <1.00 1.1 <500 380 214 150 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 0.71J <50 <5.0 <20 <5.0 Dry 70 2,040 Tetrachloroethene 2.2 7.6 4.8 0.71 <500 <20 3.54 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 <1.0 <50 <5.0 <20 <5.0 Dry 0.7 48.4 Toluene <1.0 <0.5 <1.00 <2.0 <500 <20 6.81 <200 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 0.60J <50 <5.0 <20 <5.0 Dry 600 16,100 1,2,3-Trichlorobenzene <1.0 <0.5 <1.00 <1.0 <500 <20 14.2 <100 <1.0 <0.5 <1.0 <2.0 <2.0 <0.50 <1.0 NS 63 99 220 380 280 280 310 Dry NE 30.2** 1,2,4-Trichlorobenzene <1.0 <0.5 <1.00 <0.50 <500 <20 <1.00 <50 <1.0 <0.5 <1.0 <1.0 <1.0 <1.0 <1.0 NS 450 380 1,300 890 930 1,400 1,500 Dry 70 30.2 Trichloroethene <1.0 <0.5 <1.00 <0.50 <500 <20 20.0 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 1.8J <50 <5.0 <20 <5.0 Dry 3 4.35 1,2,4-Trimethylbenzene <1.0 <0.5 <1.00 <0.50 <500 <20 3.84 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 <1.0 <50 <5.0 <20 <5.0 Dry 400 24.4 1,3,5-Trimethylbenzene <1.0 <0.5 <1.00 0.79 <500 <20 1.26 <50 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS <50 <50 0.54J <50 <5.0 <20 <5.0 Dry 400 24.4*** Total Xylenes <3.0 <1.5 <3.0 137 71,000 68,000 100,000 113,000 <3.0 <1.5 <3.0 <1.50 <1.50 <1.50 <1.50 NS 210 570 28.6 <150 <15 66 74.9 Dry 500 414 Notes:Only analytes detected above laboratory reporting limits are shown.VOCs = Volatile Organic Compounds NS = Not Sampled; NE = Not Established Ground water standards are from 15A NCAC 02L .0202 (effective January 1, 2010). Bold concentrations exceed the North Carolina Groundwater Standard. Yellow highlighting indicates concentrtaion exceeds non-residential vapor intrusion screening level * = screening level for trans-1,2-dichloroethene used as a surrogate for cis-1,2-dichloroethene ** = screening level for 1,2,4-trichlorobenzene used a surrogate for 1,2,3-trichlorobenzene *** = screening level for 1,2,4-trimethylbenzene used as a surrogate for 1,3,5-trimethylbenzene (µg/l)MW-4A(µg/l)MW-3(µg/l)(µg/l)IHSB Non-Residential Vapor Intrusion Screening Level (µg/l) Table 1Summary of Shallow Groundwater Analytical Data Former CHT Facility Charlotte, NC H&H Job No. FDP-035 S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\CHT Tables for DENR.xlsCHT Tables for DENR.xls 12/18/2013 Table 1 Hart & Hickman, PC Sample ID MW-5 GroundUnitsWater Sampling Date 5/9/022 1/14/2003 10/13/2006 5/15/2008 5/9/2002 8/2/2006 5/15/2008 5/15/2008 1/8/2009 2/25/2010 9/15/2010 8/1/2002 1/14/2003 8/2/2006 5/15/2008 1/8/2009 7/8/2009 2/25/2010 9/15/2010 1/14/2003 10/13/2006 5/15/2008 Standard Method 6210D 6210D 8260 6210D 6210D 8260 6210D 6210D 6200B 6200B 6200B 6210D 6210D 8260 6210D 6200B 6200B 6200B 6200B 6210D 8260 6210D (µg/l) VOCs Benzene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 1 69.3 Bromodichloromethane <1.0 <0.5 <1.0 <1.0 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <1.0 0.6 38.3 n-Butylbenzene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <1.0 NS NS NS <0.50 <0.5 <0.5 <1.0 <1.0 <1.0 <1.0 <1.0 <0.50 <0.5 <1.0 <0.50 70 NE sec-Butylbenzene <1.0 <0.5 <1.0 NA <0.50 <0.50 <0.50 NS NS NS <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 NA 70 NE tert-Butylbenzene <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS NS NS <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 70 NE Chlorobenzene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 50 345 Chloroform <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 70 35.5 Chloromethane <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 NS NS NS <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 3 219 1,2-Dichlorobenzene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 20 2,230 1,3-Dichlorobenzene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 200 NE 1,4-Dichlorobenzene 36 56 33 16 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 6 113 1,1-Dichloroethene 2.8 4.3 1.7J 0.86 <1.0 <1.0 0.86 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 7 164 cis-1,2-Dichloroethene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 70 315* Ethylbenzene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 600 152 Isopropylbenzene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 70 745 p-Isopropyltoluene <1.0 <0.5 <1.0 <2.0 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 0.84 <1.0 <2.0 NE NE Naphthalene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <2.0 NS NS NS <1.0 <0.5 <0.5 <1.0 <2.0 <2.0 <2.0 <2.0 <1.0 <0.5 <1.0 <0.50 6 146 n-Proplybenzene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 0.6 <1.0 <0.50 70 2,040 Tetrachloroethene 12 19 6.4 3.8 <1.0 <1.0 5.7 NS NS NS 13 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 0.7 48.4 Toluene <1.0 <0.5 <1.0 <2.0 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <2.0 600 16,100 1,2,3-Trichlorobenzene <1.0 <0.5 <1.0 4.6 <1.0 <1.0 <2.0 NS NS NS <0.50 <0.5 <0.5 <1.0 <2.0 <2.0 <2.0 <2.0 <0.50 <0.5 <1.0 <1.0 NE 30.2** 1,2,4-Trichlorobenzene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <1.0 NS NS NS <0.50 <0.5 <0.5 <1.0 <1.0 <1.0 <1.0 <1.0 <0.50 <0.5 <1.0 <0.50 70 30.2 Trichloroethene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 3 4.35 1,2,4-Trimethylbenzene <1.0 <0.5 <1.0 <0.50 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 400 24.4 1,3,5-Trimethylbenzene 8.4 9.9 3.7 1.9 <1.0 <1.0 <0.50 NS NS NS <0.50 <0.5 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.5 <1.0 <0.50 400 24.4*** Total Xylenes <3.0 <1.5 <1.5 <1.50 <1.0 <1.0 <1.50 NS NS NS <1.5 <1.5 <1.5 <3.0 <1.50 <1.50 <1.50 <1.50 <1.5 1.5 <3.0 <1.50 500 414 Notes:Notes:Only analytes detected above la Only analytes detected above laboratory reporting limits are shown.VOCs = Volatile Organic CompVOCs = Volatile Organic Compounds NS = Not Sampled; NE = Not ENS = Not Sampled; NE = Not Established Ground water standards are fro Ground water standards are from 15A NCAC 02L .0202 (effective January 1, 2010). Bold concentrations exceed the Bold concentrations exceed the North Carolina Groundwater Standard. Yellow highlighting indicates co Yellow highlighting indicates concentrtaion exceeds non-residential vapor intrusion screening level * = screening level for trans-1,2 * = screening level for trans-1,2-dichloroethene used as a surrogate for cis-1,2-dichloroethene ** = screening level for 1,2,4-tri ** = screening level for 1,2,4-trichlorobenzene used a surrogate for 1,2,3-trichlorobenzene *** = screening level for 1,2,4-t *** = screening level for 1,2,4-trimethylbenzene used as a surrogate for 1,3,5-trimethylbenzene (µg/l)MW-7 IHSB Non-Residential Vapor Intrusion Screening Level (µg/l) MW-6(µg/l)(µg/l)MW-8(µg/l) Table 1Summary of Shallow Groundwater Analytical Data Former CHT Facility Charlotte, NC H&H Job No. FDP-035 S:\AAA-Master Projects\ForSite Development Partners (FDP)\FDP-035 cht old pineville rd\Brownfields Assessment\CHT Tables for DENR.xlsCHT Tables for DENR.xls 12/18/2013 Table 1 Hart & Hickman, PC Sample ID MW-10 GroundUnitsWater Sampling Date 1/14/2003 1/14/2003 5/15/2008 1/14/2003 5/15/2008 1/14/2003 10/13/2006 5/15/2008 1/8/2009 7/8/2009 2/25/2010 9/15/2010 1/14/2003 10/13/2006 5/15/2008 1/8/2009 7/8/2009 2/25/2010 9/15/2010 Standard Method 6210D 8260 6210D 6210D 6210D 6210D 8260 6210D 6200B 6200B 6200B 6200B 6210D 8260 6210D 6200B 6200B 6200B 6200B (µg/l) VOCs Benzene <0.5 <1.0 <0.50 <5.0 1.6 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 1 69.3 Bromodichloromethane <0.5 <1.0 <1.0 11 <1.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 0.6 38.3 n-Butylbenzene <0.5 <1.0 <1.0 <5.0 1.4 <0.5 <1.0 <1.0 <1.0 <1.0 <1.0 Dry 4.6 <1.0 <1.0 <1.0 <1.0 <1.0 Dry 70 NE sec-Butylbenzene <0.5 <1.0 NA <5.0 NA <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Dry <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Dry 70 NE tert-Butylbenzene <0.5 <1.0 <0.50 <5.0 1.5 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Dry <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Dry 70 NE Chlorobenzene <0.5 <1.0 <0.50 <5.0 1.6 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 0.53 Dry 50 345 Chloroform <0.5 <1.0 <0.50 <5.0 7.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 70 35.5 Chloromethane <0.5 <1.0 <0.50 14 28 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Dry <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Dry 3 219 1,2-Dichlorobenzene <0.5 <1.0 <0.50 <5.0 <0.50 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 20 2,230 1,3-Dichlorobenzene <0.5 <1.0 <0.50 <5.0 <0.50 <0.5 0.87J <0.50 <0.50 0.72 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 200 NE 1,4-Dichlorobenzene <0.5 <1.0 <0.50 21 14 <0.5 0.84J <0.50 <0.50 0.52 <0.50 Dry 1.0 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 6 113 1,1-Dichloroethene <0.5 <1.0 <0.50 <5.0 <0.50 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 7 164 cis-1,2-Dichloroethene <0.5 <1.0 <0.50 <5.0 <0.50 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 70 315* Ethylbenzene 1.1 <1.0 <0.50 24,000 1.0 <0.5 <1.0 <0.50 0.81 <0.50 0.58 Dry 49 1.0 <0.50 <0.50 <0.50 0.52 Dry 600 152 Isopropylbenzene <0.5 <1.0 <0.50 44 1.7 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 2.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 70 745 p-Isopropyltoluene 0.94 <1.0 <2.0 120 <2.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry NE NE Naphthalene <0.5 <1.0 <0.50 <5.0 <0.50 <0.5 <1.0 <2.0 <2.0 <2.0 <2.0 Dry 4.0 <1.0 <2.0 <2.0 <2.0 <2.0 Dry 6 146 n-Proplybenzene 1.0 1.0 <0.50 42 <0.50 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 70 2,040 Tetrachloroethene <0.5 <1.0 <0.50 <5.0 <0.50 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 0.7 48.4 Toluene <0.5 <1.0 <2.0 <5.0 <2.0 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 0.74 <0.50 <0.50 <0.50 Dry 600 16,100 1,2,3-Trichlorobenzene <0.5 <1.0 4.2 <5.0 <1.0 0.69 1.3J <2.0 <2.0 <0.20 <1.0 Dry <0.5 <1.0 <2.0 <2.0 <2.0 <2.0 Dry NE 30.2** 1,2,4-Trichlorobenzene <0.5 <1.0 <0.50 <5.0 <0.50 2.7 9.4 <1.0 <1.0 4.0 <1.0 Dry 4.8 <1.0 <1.0 <1.0 <1.0 <1.0 Dry 70 30.2 Trichloroethene <0.5 <1.0 <0.50 <5.0 <0.50 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 3 4.35 1,2,4-Trimethylbenzene <0.5 <1.0 <0.50 6.9 <0.50 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 400 24.4 1,3,5-Trimethylbenzene <0.5 <1.0 <0.50 <5.0 <0.50 <0.5 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 0.55 <1.0 <0.50 <0.50 <0.50 <0.50 Dry 400 24.4*** Total Xylenes 5.3 <3.0 <1.50 64,000 101.5 <1.5 <1.5 <1.50 4.1 <1.50 1.3 Dry 47 <3.0 1.5 <1.50 <1.50 <1.5 Dry 500 414 Notes:Only analytes detected above laboratory reporting limits are shown.VOCs = Volatile Organic Compounds NS = Not Sampled; NE = Not Established Ground water standards are from 15A NCAC 02L .0202 (effective January 1, 2010). Bold concentrations exceed the North Carolina Groundwater Standard. Yellow highlighting indicates concentrtaion exceeds non-residential vapor intrusion screening level * = screening level for trans-1,2-dichloroethene used as a surrogate for cis-1,2-dichloroethene ** = screening level for 1,2,4-trichlorobenzene used a surrogate for 1,2,3-trichlorobenzene *** = screening level for 1,2,4-trimethylbenzene used as a surrogate for 1,3,5-trimethylbenzene MW-11(µg/l)MW-12(µg/l)IHSB Non-Residential Vapor Intrusion Screening Level (µg/l) MW-9(µg/l)(µg/l) 1646 Mail Service Center, Raleigh, North Carolina 27699-1646 Phone: 919-707-8200 \ Internet: http://portal.ncdenr.org/web/wm An Equal Opportunity \ Affirmative Action Employer – 50% Recycled \ 10% Post Consumer Paper North Carolina Department of Environment and Natural Resources Division of Waste Management Pat McCrory Dexter R. Matthews Governor Director John E. Skvarla, III Secretary June 22, 2009 Sent Via E-mail Steve Hart Hart & Hickman 2923 South Tryon Street, Suite 100 Charlotte, NC 28203-5449 Shart@harthickman.com Subject: Work Plan Approval Brownfields Assessment CHT Facility 5046 Old Pineville Road Charlotte, Mecklenburg County Brownfields Project Number 16003-12-60 Dear Mr. Hart: On January 9, 2014, the North Carolina Brownfields Program, (NCBP) has received the Brownfields Assessment Work Plan dated December 18, 2013 for the above referenced site. NCBP approves the work plan. Be advised that this approval from the Brownfields Program does not waive any applicable requirement to obtain any necessary permits, licenses or certifications for the above listed activities nor does it waive any requirement to comply with applicable law for such activities. If you have any questions or comments, please contact me at 704/661-0330. Sincerely, Carolyn Minnich Carolyn Minnich Brownfields Project Manager Division of Waste Management ec: Bruce Nicholson, NCDENR