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Home My WebLink About15035_Sun Chemical_IAS reportIndoor Air Sampling Report Sun Chemical FacilitySun Chemical Facility 1701 Westinghouse Blvd. Charlotte, North Carolina Brownfields Project No 15035 11 60BrownfieldsProject No. 15035-11-60 H&H Job No. PPA-038 February 28, 2012 2923 South Tryon Street S ite 100Suite 100 Charlotte, NC 28203 704-586-0007 3334 Hillsborough Street Raleigh, NC 27607 919-847-4241 #C-1269 Engineering #C-245 Geology Via E-mail February 28, 2012 North Carolina Department of Environment and Natural Resources Division of Waste Management Brownfields Section 1646 Mail Service Center Raleigh, NC 27699-1646 Attention: Ms. Carolyn Minnich Re: Indoor Air Sampling Report Sun Chemical Facility 1701 Westinghouse Blvd. Charlotte, North Carolina Brownfields Project No. 15035-11-60 H&H Job No. PPA-038 Dear Carolyn: 1.0 Introduction On behalf of Selwyn Property Group Investments, LLC, Hart & Hickman, P.C. (H&H) is presenting this report of indoor air sampling for the Sun Chemical facility located at 1701 Westinghouse Blvd. in Charlotte, North Carolina. In November and December 2011, H&H conducted a Brownfields site assessment which included soil, groundwater, and subslab soil vapor sampling. As part of the assessment activities, eight subslab soil vapor samples were collected from below the site buildings. The locations of the soil vapor samples, labeled SV-1 through SV-8, are indicated in Figure 1. Results of analysis of the subslab samples indicated the presence of tetrachloroethene (PCE) and/or 1,2,4-trimethlybenzene (1,2,4-TMB) at concentrations above the North Carolina Department of Environment and Natural Resources (DENR) Inactive Hazardous Sites Branch (IHSB) commercial/industrial soil vapor screening levels in samples collected below the northern warehouse (SV-2), the western manufacturing area (SV-3), the office area (SV-5), and the maintenance building (SV-8). Ms. Carolyn Minnich February 28, 2012 Page 2 S:\AAA-Master Projects\Parker Poe Adams (PPA)\PPA-038 sun chemical selwyn group\Brownfields Assessment\Indoor Air Assessment\Sun Chem IAS report.doc H&H recommended that indoor air samples be collected from those areas with subslab soil vapor samples above screening levels to determine if compound concentrations are present in indoor air at levels of potential concern. A work plan for the indoor air sampling was submitted to DENR on January 6, 2012, and DENR approved the work plan in a letter dated January 12, 2012. The methods, results, and conclusions of the of the indoor air sampling are presented below. 2.0 Facility Information The facility has historically been used for ink production. The facility is occupied by Sun Chemical which recently shut down ink production. Activities being conducted at the facility at this time include shipping raw materials and finished inks from the facility and plant decommissioning. The laboratory in the northeastern portion of the building is still being used for small batch formulation and testing of ink products. The two warehouse buildings and the manufacturing area have ventilation systems which are used to draw in fresh air because these areas of the facility are or were used for storage and manufacture of flammable materials. The office and laboratory areas and maintenance building have standard heating ventilation and air conditioning (HVAC) systems. In addition, the laboratory area has bench-top ventilation systems which draw air out of the laboratory. H&H contacted Sun Chemical to determine if any of the compounds for which the indoor air samples were analyzed are suspected to be present in chemicals or products that may be stored or used at the facility. Based upon their review, Sun Chemical indicated that it does not purchase or store any of the compounds for which the indoor air samples were analyzed. Ms. Carolyn Minnich February 28, 2012 Page 3 S:\AAA-Master Projects\Parker Poe Adams (PPA)\PPA-038 sun chemical selwyn group\Brownfields Assessment\Indoor Air Assessment\Sun Chem IAS report.doc 3.0 Indoor Air Sampling and Analysis In accordance with the approved work plan, H&H collected six indoor air samples and one background sample at the site on January 19, 2012. The locations of the samples are indicated in Figure 1 and a description of the sample locations is provided below: • IAS-1 was collected from the northern warehouse building where PCE and 1,2,4-TMB were detected above the commercial/industrial soil vapor screening levels during subslab vapor sampling activities. • IAS-2, IAS-3, and IAS-5 were collected from the office and laboratory areas where PCE was detected above the soil vapor screening level during subslab vapor sampling activities. IAS-2 was collected in an office in the northern portion of the office area (labeled office 216), IAS-3 was collected inside the training/conference of the office area (labeled room 213), and IAS-5 was collected from western portion of the laboratory area (labeled lab area 129). • IAS-4 was collected from the western portion of the manufacturing area where 1,2,4- TMB was detected above the soil vapor screening level in previous sampling. • IAS-6 was collected from the maintenance building where PCE was detected above the screening level during previous sampling. • A background sample (BAS-1) was collected from the exterior southeastern portion of a background location upwind of the site building. Based on the general wind direction for that day (east and southeast), BAS-1 was placed in the southeast corner of the site property The indoor air and background samples were collected with stainless steel 6-liter Summa canisters. The Summa canisters were connected to an airflow regulator that regulated the air intake to collect a sample over an approximate eight hour sample time and a 3 ft long sampling Ms. Carolyn Minnich February 28, 2012 Page 4 S:\AAA-Master Projects\Parker Poe Adams (PPA)\PPA-038 sun chemical selwyn group\Brownfields Assessment\Indoor Air Assessment\Sun Chem IAS report.doc cane. The 3 ft long sampling cane was connected to the Summa canister in order to collect the sample at a total height of approximately 5 ft above grade (typical breathing zone height). A sampling cane was not used for sample location IAS-5 because the Summa canister was placed on top of a laboratory bench. The indoor air samples were collected during a regular work day. All HVAC systems and ventilation systems were operating normally. Doors and dock doors were kept closed during the sampling event, except doors that were normally opened and closed as part of regular workday activities. Photographs of the sample locations are provided in Appendix A. As part of the sampling effort, H&H measured the office area/outdoor air pressure differential in each unit, warehouse, and office space near the start, middle, and end of the 8-hour sampling period using a manometer sensitive to 0.01 inches water. In addition, exterior wind speed, exterior wind direction, and indoor/outdoor temperature were recorded near the start, middle, and end of the sampling period. Results of the differential pressure measurements and weather conditions are recorded on Table 1. Following sample collection, the Summa canisters were shipped to Con-Test Laboratories under standard chain-of-custody protocol. In accordance with the work plan, the samples were analyzed for PCE, trichloroethylene (TCE), cis-1,2-dichlororethylene (cis-1,2-DCE), vinyl chloride, and 1,2,4-TMB by EPA Method TO-15. A copy of the laboratory report and chain-of- custody is included in Appendix B. Ms. Carolyn Minnich February 28, 2012 Page 5 S:\AAA-Master Projects\Parker Poe Adams (PPA)\PPA-038 sun chemical selwyn group\Brownfields Assessment\Indoor Air Assessment\Sun Chem IAS report.doc 4.0 Results and Conclusions Field measurements collected during the sampling event indicate a slight negative pressure inside the buildings as compared to outside the building in most of the areas where indoor sampling was conducted. The greatest differential pressure was in the laboratory where there are bench top exhaust fans to outdoor air which is likely contributing the slight negative pressure inside this area. Exterior temperatures during the sampling event were in the range of 44 to 48 oF. The results of analysis of the indoor air samples are summarized in Table 2. Low concentrations of PCE ranging from 0.12 µg/m3 to 1.2 µg/m3 were detected in the indoor air samples. PCE was detected in the background sample at a concentration of 0.11 µg/m3, and the detections in IAS-1, IAS-2, IAS-3, and IAS-4 were all similar to the background level. The detected PCE concentrations are below the IHSB Industrial/Commercial screening level of 2.1 µg/m3 which is calculated based upon a conservative lifetime incremental cancer risk (LICR) of 1 x 10-6. TCE was detected in sample IAS-6 (maintenance building) only at a concentration of 0.65 µg/m3 which is below the screening level of 1.76 µg/m3 (also based upon a LICR of 1 x 10-6). The PCE and TCE detections are significantly below the IHSB screening levels based upon a LICR of 1 x 10-4. Vinyl chloride and cis-1,2-DCE were not detected in any of the samples. Low concentrations of 1,2,4-TMB were detected in each of the indoor air samples at concentrations ranging from 0.13 µg/m3 to 2.5 µg/m3. 1,2,4-TMB was also detected in the background sample at a concentration of 0.1 µg/m3, and the 1,2,4-TMB concentrations in samples IAS-1, IAS-2, IAS-3, and IAS-4 were similar to the background level. The detected 1,2,4-TMB concentrations are below the IHSB Industrial/Commercial screening level of 6.2 µg/m3 which is based upon a non-carcinogenic hazard index of 0.2. In summary, no compounds were detected in indoor air above DENR conservative screening levels. DENR Brownfields typically does not request further assessment of the vapor intrusion pathway if detected compound concentrations are below the most conservative screening levels. Based upon the indoor air sampling results and because the sampling was conducted in the Ms. Carolyn Minnich February 28, 2012 Page 6 S:\AAA-Master Projects\Parker Poe Adams (PPA)\PPA-038 sun chemical selwyn group\Brownfields Assessment\Indoor Air Assessment\Sun Chem IAS report.doc winter when higher levels of indoor air concentrations may occur, H&H recommends no further evaluation of vapor intrusion in the site buildings. If you have any questions concerning this report, please contact me. We look forward to your approval of this report and completion of the Brownfields agreement for this site. Very truly yours, Hart & Hickman, PC Steven C. Hart, PG Principal cc: Pat Pierce – Selwyn Property Investment Group Tom Griffin – Parker Poe S:\AAA-Master Projects\Parker Poe Adams (PPA)\PPA-038 sun chemical selwyn group\Brownfields Assessment\Indoor Air Assessment\Tables 2012-01-27 IAS.xlsxTables 2012-01-27 IAS.xlsx Table 1 (Page 1 of 1) Hart & Hickman, PC Time Temperature oF Differential Pressure (in Water) Temperature oF Wind Direction Wind Speed (mph) Precipitation (inches) 9:20 NA NA 40 SE-E 5 None 12:00 NA NA 44 E-SE 5 None 15:00 NA NA 48 S-SW 3 None Beginning 66.7 0.000 Middle 67 -0.003 End 65 -0.005 Beginning 70 -0.015 Middle 72 -0.017 End 72 -0.017 Beginning 70 -0.015 Middle 72 -0.017 End 72 -0.017 Beginning 67 0.000 Middle 68 0.004 End 68 -0.027 Beginning 71 -0.021 Middle 71 -0.027 End 71 -0.023 Beginning 67 -0.005 Middle 65 0.000 End 67 -0.004 Notes: Information from on-site weather station set up at southeast corner of site property by H&H on January 19, 2012 during indoor air sampling event. Negative Differential Pressure denotes higher pressure outside building Differential pressure and temperature readings taken from each sample location at the beginning, middle, and end during the 8-hour sample collection NA = Not Applicable mph = miles per hour Conference Room IAS-1 Table 1 Sun Chemical Facility Charlotte, North Carolina H&H Job No. PPA-038 Indoor and Outdoor Air Monitoring Data Outdoor BAS-1 South East Property Boundary- Outdoor IAS-5 IAS-6 Office Manufacturing Laboratory Maintenance IAS-3 IAS-4 Sample ID Sample Location Indoor Warehouse IAS-2 Table 2 (Page 1 of 1) Summary of Indoor Air Analytical Data Sun Chemical Facility Charlotte, North Carolina Hart & Hickman Project No. PPA-038 S:\AAA-Master Projects\Parker Poe Adams (PPA)\PPA-038 sun chemical selwyn group\Brownfields Assessment\Indoor Air Assessment\Tables 2012-01-27 IAS.xlsxTables 2012-01-27 IAS.xlsx Table 2 (Page 1 of 1) Hart & Hickman, PCcis-1,2-DichloroethyleneTetrachloroethyleneTrichloroethylene1,2,4-TrimethylbenzeneVinyl ChlorideIAS-1 Northern Warehouse 01/19/12 TO-15 <0.070 0.21 J <0.19 0.21 <0.090 IAS-2 Office Area 01/19/12 TO-15 <0.070 0.16 J <0.19 0.16 J <0.090 IAS-3 Office Area 01/19/12 TO-15 <0.070 0.12 J <0.19 0.13 J <0.090 IAS-4 Western Manufacturing 01/19/12 TO-15 <0.070 0.13 J <0.19 0.23 <0.090 IAS-5 Laboratory 01/19/12 TO-15 <0.070 1.2 <0.19 0.62 <0.090 IAS-6 Maintenance Building 01/19/12 TO-15 <0.070 0.79 0.65 2.5 <0.090 BAS-1 Exterior Background (Southeast Property Boundary)01/19/12 TO-15 <0.070 0.11 J <0.19 0.10 J <0.090 NE 2.1 1.76 6.2 2.8 NE 210 176 31 280 Notes: Screening Levels from table dated Janaury 2012 IHSB = Inactive Hazardous Sites Branch LICR = Lifetime Incrcemental Cancer Risk; HI = Non-carcinogenic Hazard Index J flag indicates compound was detected below the reporting limit. Listed value is estimated.Sample IDIHSB Industrial/Commercial Indoor Air Screening Concentration (Based upon LICR of 1 x 10-6 and HI of 0.2) NE = Not Established, µg/m3 = micrograms per cubic meter TO-15 Method abbreviated to report only the compounds listed aboveSample LocationSampling Date Analytical Methodµg/m3 IHSB Industrial/Commercial Indoor Air Screening Concentration (Based upon LICR of 1 x 10-4 and HI of 1) Appendix A Photographs Photograph 1: IAS-1 in northern warehouse. Photograph 2: IAS-2 in office area.FPG-002SUN CHEMICAL CHARLOTTE, NORTH CAROLINA Photograph 3: IAS-3 in office area conference room.FPG-002SUN CHEMICAL CHARLOTTE, NORTH CAROLINA Photograph 4: IAS-4 in western manufacturing area. Photograph 5: IAS-5 in laboratory.FPG-002SUN CHEMICAL CHARLOTTE, NORTH CAROLINA Photograph 6: IAS-6 in maintenance building. Photograph 7: Background sample BAS-1 in southeast portion of site.FPG-002SUN CHEMICAL CHARLOTTE, NORTH CAROLINA Appendix B Laboratory Analytical Data