24008_Selles Bagwell_ EMP Rev-1_20211207

Environmental Management Plan

Selles Bagwell Brownfields Property
Brownfields Project No. 24008-20-060

2301, 2311, 2321, and 2405 S. Tryon Street
and
2300 and 2322-2324 Distribution Street
Charlotte, North Carolina

H&H Job No. HAN-007
September 15, 2021
(Revised December 7, 2021)

#C-1269 Engineering
#C-245 Geology

Table of Contents

EMP Template Form

Tables

Table 1 Summary of Soil Analytical Results
Table 2 Summary of Temporary Well Construction
Table 3 Summary of Groundwater Analytical Results
Table 4 Summary of Groundwater Results Compared to Surface Water Standards
Table 4 Summary of Soil Gas and Sub-Slab Vapor Analytical Results

Figures

Figure 1 Site Location Map
Figure 2 Site Map
Figure 3 Sample Location Map

Appendices

Appendix A Preliminary Site Plan
Appendix B Preliminary Cut/Fill Analysis
Appendix C Proposed Construction Schedule
Appendix D Risk Calculations

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EMP Version 2, June 2018   
NORTH CAROLINA BROWNFIELDS PROGRAM 
ENVIRONMENTAL MANAGEMENT PLAN 

This form is to be used to prepare an Environmental Management Plan (EMP) for projects in 
the North Carolina Brownfields Program at the direction of a Brownfields project manager. 

The EMP is a typical requirement of a Brownfields Agreement (BFA).  Its purpose is to clarify 
actions to be taken during the demolition and construction at Brownfields properties in an 
effort to avoid delays in the event of the discovery of new contamination sources or other 
environmental conditions.  The EMP provides a means to document redevelopment plans and 
environmental data for each applicable environmental medium to inform regulatory‐compliant 
decision‐making at the site.  As much detail as possible should be included in the EMP, 
including contingency planning for unknowns.  Consult your project manager if you have 
questions. 

Prospective Developers and/or their consultants must complete and submit this form and all 
pertinent attachments, see checklist below, to their Brownfields project manager prior to any 
earthmoving or other development‐related activities that have the potential to disturb soil at 
the Brownfields Property, including demolition.  For the resultant EMP to be valid for use, it 
must be completed, reviewed by the program, signed by all parties working on the project, 
and approved by the Brownfields project manager.  Failure to comply with the requirements of 
the EMP could jeopardize project eligibility, or in the event of a completed agreement, be 
cause for a reopener   

So that the EMP provides value in protecting brownfields eligibility and public health, the 
preparer shall ensure that the following steps have been completed prior to submitting the 
EMP for review.  Any EMP prepared without completing these steps is premature.   

☒ Site sampling and assessment that meets Brownfields’ objectives is complete and has 
been reviewed and approved by the Brownfields Project Manager. 

☒ Specific redevelopment plans, even if conceptual, have been developed for the project, 
submitted and reviewed by the Brownfields Project Manager. 

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EMP Version 2, June 2018   
Please submit, along with the completed EMP form, the following attachments, as relevant 
and applicable to the proposed redevelopment:      

☒ A set of redevelopment plans, including architectural/engineering plans, if available; if 
not conceptual plans may suffice if updated when detailed plans are drafted. 

☒ A figure overlaying redevelopment plans on a map of the extent of contamination for 
each media. 

☒ Site grading plans that include a cut and fill analysis. 

☐ A figure showing the proposed location and depth of impacted soil that would remain 
on site after construction grading. 

☐ Any necessary permits for redevelopment (i.e. demolition, etc.). 

☒ A detailed construction schedule that includes timing and phases of construction. 

☒ Tabulated data summaries for each impacted media (i.e. soil, groundwater, soil gas, 
etc.) applicable to the proposed redevelopment. 

☒ Figures with the sampling locations and contamination extents for each impacted media 
applicable to the proposed redevelopment. 

☐ A full final grade sampling and analysis plan, if the redevelopment plan is final. 

☐ If known, information about each proposed potential borrow soil source, such as aerial 
photos, historic site maps, historic Sanborn maps, a site history, necessary for 
brownfields approval. 

☒ Information and, analytical data if required, for quarries, or other borrow sources, 
detailing the type of material proposed for importation to the Brownfields Property. 

☒ A work plan for the sampling and analysis of soil to be brought onto the Brownfields 
Property.  Refer to Issue Resolution 15 in Brownfields Program Guidelines. 

☐ A map of the Brownfields Property showing the location of soils proposed for export 
and sampling data from those areas. 

☒ If a Vapor Mitigation System is required by the Brownfields Program, the Vapor 
Intrusion Mitigation System (VIMS) plan will be signed and sealed by a NC Professional 
Engineer.  The VIMS Plan may also be submitted under separate cover. 

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EMP Version 2, June 2018   
GENERAL INFORMATION 

Date: 9/15/2021 Revision Date (if applicable): 12/7/2021 

Brownfields Assigned Project Name: Selles Bagwell Brownfields Property  

Brownfields Project Number: 24008‐20‐060  

Brownfields Property Address: 2301, 2311, 2321, and 2405 S. Tryon Steet, and 2300 and 2322‐2324 
Distribution Street, Charlotte, Mecklenburg County, North Carolina (Figure 1) 

Brownfields Property Area (acres): 4.06 acres 
Is Brownfields Property Subject to RCRA Permit?.......................☐ Yes   ☒ No 
If yes enter Permit No.: Click or tap here to enter text. 
Is Brownfields Property Subject to a Solid Waste Permit….……..☐ Yes   ☒ No 
If yes, enter Permit No.: Click or tap here to enter text. 

COMMUNICATIONS 

A copy of this EMP shall be distributed to all the parties below as well as any contractors or site workers 
that may be exposed to site vapors, soil, groundwater, and/or surface water.  Additionally, a copy of the 
EMP shall be maintained at the Brownfields Property during redevelopment activities.  NOTE, THE EMP 
DOES NOT TAKE THE PLACE OF A SITE‐SPECIFIC HEALTH AND SAFETY PLAN. 

Prospective Developer (PD): HANIMPJV South End NC LLC c/o The Hanover Company    
Contact Person: Kristen Gates – Director of Predevelopment  
Phone Numbers:   Office: 713‐580‐1321 Mobile: same   
Email: [e-mail]   

Contractor for PD: Hanover R.S. Construction, LLC   
Contact Person: Jonathon Thurston 
Phone Numbers:   Office: Click or tap here to enter text. Mobile: Click or tap here to enter text.   
Email: [e-mail]    

Environmental Consultant: Hart & Hickman, PC     
Contact Person: Matt Ingalls  
Phone Numbers:   Office: 704‐586‐0007 Mobile: 704‐560‐5767   
Email: [e-mail]  

Brownfields Program Project Manager:  Peter Doorn  
Phone Numbers:   Office: 984‐275‐5391 Mobile: same   
Email: [e-mail]   

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EMP Version 2, June 2018   
Other DEQ Program Contacts (if applicable, i.e., UST Section, Inactive Hazardous Site Branch, 
Hazardous Waste, Solid Waste):  
Not Applicable  

NOTIFICATIONS TO THE BROWNFIELDS PROGRAM   

Written advance Notification Times to Brownfields Project Manager: Check each box to accept 
minimum advance notice periods (in calendar days) for each type of onsite task: 

On‐site assessment or remedial activities:……………………………………….…… 10 days Prior        ☒ 

Construction or grading start:……………………………………….………………………. 10 days Prior       ☒

Discovery of stained soil, odors, USTs, buried drums or waste, landfill, or other signs of previously 
unknown contamination: ……………………………….……………………………………. Within 48 hours   ☒

Implementation of emergency actions (e.g. dewatering, flood or soil erosion control measures in 
area of contamination, ventilation of work zones):…………….……….……… Within 48 hours  ☒ 

Installation of mitigation systems:………………………….………………….……….. 10 days Prior         ☒

Other notifications as required by local, state or federal agencies to implement redevelopment 
activities: (as applicable): ……………………….…………………………………………..… Within 30 days     ☒ 

REDEVELOPMENT PLANS 

1) Type of Redevelopment (check all that apply): 
☒Residential  ☒Recreational  ☐Institutional  ☐Commercial  ☒Office  ☐Retail  ☐Industrial 
☒Other specify: 
The Site consists of six contiguous parcels of land (Parcel #s 12104301, 12104302, 12104303, 
12104304, 12104319, and 12104317) that total approximately 4.06 acres.  Descriptions of the six 
parcels that comprise the Brownfields Site are as follows: 

 2301 S. Tryon Street (Parcel #12104301) – a 0.455‐acre industrial property developed with 
a  4,500‐square  ft  office/warehouse  building  constructed  in  1984 and most recently 
occupied by Kelly & McArdle Construction; 

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EMP Version 2, June 2018   
 2311 S. Tryon Street (Parcel #12104302) – a 0.563‐acre industrial property developed with 
a  13,000‐square  ft  office/warehouse  building  constructed  in  1967  and  most  recently 
occupied by Best Tile; 
 2321 S. Tryon Street (Parcel #12104303) – a 1.088‐acre industrial property developed with 
an 8,900‐square ft office/warehouse building  constructed in 1959 and most recently 
occupied by Interstate Electric; 
 2405 S. Tryon Street (Parcel #12104304) – a 0.497‐acre industrial property developed with 
a vacant 9,000‐square ft duplex industrial office/warehouse building constructed in 1976;  
 2300 Distribution Street (Parcel #12104319) – a 0.661‐acre industrial property developed 
with a 15,508‐square ft office/warehouse building constructed in 1966 and most recently 
occupied by World of Stone; and 
 2322‐2324  Distribution  Street  (Parcel  #12104317)  ‐  a  0.808‐acre  industrial  property 
developed  with  a  12,012‐square  ft  commercial/light  industrial  warehouse  building 
constructed in 1964 and most recently occupied by the Charlotte Grill Company (2324‐A) 
and Pet Wants (2324‐B, a pet supply store). 

The remaining portions of the Site include parking lots, storage yards, loading areas, and limited 
landscaped vegetated areas.  A drainage feature conveys surface water through the central 
portion of the Brownfields Site in a west‐northwesterly direction.  A Site location map is 
presented as Figure 1 and a Site map is included as Figure 2. 

The Site buildings are currently vacant and will be demolished in the future for redevelopment of 
a multi‐family residential building with subgrade/above grade parking.  A preliminary figure 
depicting the proposed residential redevelopment is included in Appendix A.  

2) Check the following activities that will be conducted prior to commencing earth‐moving activities 
at the site: 
☒ Review of historic maps (Sanborn Maps, facility maps) 
☒ Conducting geophysical surveys to evaluate the location of suspect UST, fuel lines, utility 
lines, etc. 
☒ Interviews with employees/former employees/facility managers/neighbors 

3) Summary of Redevelopment Plans (MANDATORY: attach detailed plans or conceptual plans, if 
detailed plans are not available. EMP review without such information would be premature): 
  Provide brief summary of redevelopment plans, including demolition, removal of building 
slabs/pavement, grading plans and planned construction of new structures:  
Current redevelopment plans include demolition of the existing Site structures and development 
of a multi‐story residential building constructed with structured parking.  Redevelopment plans 

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EMP Version 2, June 2018   
also include paving the vehicle access drive and parking areas, new utility installations, and 
landscaping. 

According to the most recent grading plan and cut/fill analysis dated July 14, 2021, 
approximately 1,500 cubic yards (CYs) of export soil is expected to be generated to achieve the 
desired grade and implement positive drainage across the Site.  An additional approximately 
4,400 CYs of spoils comprised of asphalt, gravel, and surficial soil is expected to be exported off‐
Site.  Preliminary Site plans, which include the grading plan, are provided as Appendix A, and a 
Preliminary Cut and Fill Analysis is provided as Appendix B.  The current construction schedule 
(dated August 27, 2021) is included in Appendix C. 

4) Do plans include demolition of structure(s)?: 
   ☒ Yes  ☐ No ☐ Unknown  
☒ If yes, please check here to confirm that demolition will be conducted in accordance with 
applicable legal requirements, including without limitation those related to lead and asbestos 
abatement that are administered by the Health Hazards Control Unit within the Division of Public 
Health of the North Carolina Department of Health and Human Services.  If available, please 
provide a copy of your demolition permit.  

5) Are sediment and erosion control measures required by federal, state, or local regulations? 
  ☒ Yes    ☐ No    ☐ Unknown  
☒  If yes, please check here to confirm that demolition will be conducted in accordance with 
applicable legal requirements.  If soil disturbance is necessary to install sediment and erosion 
control measures, they may not begin until this EMP is approved.  

6) Which category of risk‐based screening level is used or is anticipated to be specified in the 
Brownfields Agreement?  Note: If children frequent the property, residential screening levels shall 
be cited in the Brownfields Agreement for comparison purposes. 
☒ Residential   ☐ Non‐Residential or Industrial/Commercial 

7) Schedule for Redevelopment (attach construction schedule): 
a) Construction start date: 12/6/2021 

b) Anticipated duration (specify activities during each phase):  
5/10/2024 (please see the attached construction calendar (Appendix C) for specific dates for 
the various construction activities) 

c) Additional phases planned? ☐ Yes  ☐ No   
  If yes, specify the start date and/or activities if known:  
Start Date:  Not Applicable 
    Planned Activity: 
Additional phases of construction are not anticipated at this time.  

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EMP Version 2, June 2018   
Start Date:  Click or tap to enter a date. 
    Planned Activity: 
Click or tap here to enter text. 

Start Date: Click or tap to enter a date. 
    Planned Activity: 
Click or tap here to enter text. 

d) Provide the planned date of occupancy for new buildings: TBD

CONTAMINATED MEDIA 

1) Contaminated Media on the Brownfields Property 
Part 1. Soil:……………………………………….……………. ☒  Yes   ☐ No   ☐ Suspected   
Part 2. Groundwater:.……………………….……..……. ☒  Yes   ☐ No   ☐ Suspected   
Part 3. Surface Water:.……………...……..…………… ☐  Yes   ☒ No   ☐ Suspected   
Part 4. Sediment:.……………...……..…………………… ☐  Yes   ☒ No   ☐ Suspected   
Part 5. Soil Vapor:…..…………...……..…………………. ☒  Yes   ☐ No   ☐ Suspected   
Part 6. Sub‐Slab Soil Vapor:……...……..…………….. ☒  Yes   ☐ No   ☐ Suspected 
Part 7. Indoor Air:...……..…………………………………. ☐  Yes   ☒ No   ☐ Suspected 

2) For the Area of Proposed Redevelopment on the Brownfields Property, attach tabulated data 
summaries for each impacted media and figure(s) with sample locations.  

PART 1. Soil – Please fill out the information below, using detailed site plans, if available, or estimate 
using known areas of contaminated soil and a conceptual redevelopment plan.  Provide a figure 
overlaying new construction onto figure showing contaminated soil and groundwater locations.

1) Known or suspected contaminants in soil (list general groups of contaminants): 
During previous assessment activities conducted in 2019 (Phase II ESA conducted on the 2300 
Distribution St. parcel) and in 2021 (Brownfields Assessment conducted on the entire Site), H&H 
conducted soil sampling from soil boring locations advanced to various depths.  Laboratory 
analytical results of the soil samples are summarized in Table 1, and sample locations are 
presented on Figure 3.   

A brief summary of the soil assessment results is provided below: 

VOCs 
Analytical results indicate that no volatile organic compounds (VOCs) were detected in any of the 
soil  samples  at  concentrations  above  protection  of  groundwater (POG),  residential,  or 

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EMP Version 2, June 2018   
industrial/commercial Preliminary Soil Remediation Goals (PSRGs). 

SVOCs 
None of the soil samples had detections of SVOCs above laboratory detection limits.   

Metals 
Analytical  results  indicate  that  no  metals  were  detected  at  concentrations  above 
industrial/commercial PSRGs or published background levels for North Carolina soils.   

Selenium was detected in the soil samples collected from SB‐3 and SB‐4 at concentrations of 2.3 
mg/kg and 3.3 mg/kg, respectively, slightly above the POG PSRG of 2.1 mg/kg, and the regional 
background concentration of 0.42 mg/kg.  In addition, arsenic was detected in each soil sample 
above the Residential PSRG.  However, the concentrations detected were within the range of 
naturally occurring background concentrations (Dagun and Chekiri, 2005). 

Hexavalent chromium was detected in an SB‐2 (10‐12 ft) soil sample at a concentration 0.67 
milligrams per kilogram (mg/kg) and in the SB‐3 (1‐2 ft) soil sample at a concentration 1.7 mg/kg 
, which exceed the DEQ Residential PSRG of 0.31 mg/kg. 

Additional metals, including barium, total chromium, lead, and selenium, were detected at 
concentrations generally consistent with published average background levels for North Carolina 
soils.  

2) Depth of known or suspected contaminants (feet): 
The hexavalent chromium detections in soil samples that exceeded the DEQ residential PSRGs 
ranged in depth from 1 to 12 feet below ground surface (ft bgs) on the 2301 and 2321 S. Tryon 
Street) parcels, respectively. 

3) Area of soil disturbed by redevelopment (square feet): 
The area of potential soil disturbance is estimated to be approximately 3.7 acres of the 4.06‐acre Site.  
The remainder of the Site will be covered by an access driveway, sidewalks, and limited landscaped 
areas.   

Soil will be cut from the central, southeastern, and southern portions of the Site, which will be used as 
beneficial fill as appropriate in the western, northwestern and northeastern portions of the Site.  The 
beneficial fill will raise the grade between < 1 ft to 6 ft above the current grade.  The cut areas will 
range from depths <1 ft to 9 ft below the current grade.  Grading activities will be conducted in 
accordance with applicable local, state, and federal regulations including submittal of an erosion 
control plan to Mecklenburg County.  The grading contractor will utilize grading equipment (i.e., 
backhoes, front end loaders, bull dozers, etc.) and will implement best management practices (i.e., 
installation of silt fencing) to manage soil on‐Site during Site redevelopment activities.  A copy of the 
proposed grading plan is included in the preliminary Site plans which are provided as Appendix A and a 
preliminary cut/fill analysis is provided as Appendix B.   

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EMP Version 2, June 2018   

4) Depths of soil to be excavated (feet): 
Shallow soil disturbance (i.e., less than 1 ft) on the Brownfields property is currently planned for 
the majority of the Site as part of initial grading activities of the existing paved areas.  Installation 
of new utilities may include excavation to depths of up to approximately 5 ft bgs.  Soil during 
construction of the multi‐story residential tower will be dug to depths up to approximately 9 ft 
bgs.  

5) Estimated volume of soil (cubic yards) to be excavated (attach grading plan): 
Approximately 215 cubic yards (CYs) of export soil is expected to be generated to achieve the 
desired grade and implement positive drainage across the Site.  An additional approximately 
4,405 CYs of spoils comprised of asphalt, gravel, and surficial soil is expected to be exported off‐
Site.  

6) Estimated volume of excavated soil (cubic yards) anticipated to be impacted by contaminants:             
Based on current grading and construction plans, known impacted soils are not anticipated to be 
excavated during redevelopment activities at the Site except for possible hexavalent chromium 
detections.  

7) Estimated volume of contaminated soil expected to be disposed of offsite, if applicable:   
As noted above, approximately 215 CYs of export soil is expected to be generated to achieve the 
desired grade and implement positive drainage across the Site.  An additional approximately 
4,405 CYs of spoils comprised of asphalt, gravel, and surficial soil is expected to be exported off‐
Site and disposed of off‐site at a Municipal Solid Waste Landfill (MSWLF, e.g., Speedway Landfill 
in Concord, NC) or a Land Clearing and Inert Debris (LCID) landfill.  Should soil or buried debris 
need to be exported from the Brownfields property during redevelopment, a sampling plan will 
be developed and submitted to DEQ Brownfields for review and approval once the volume of soil 
for export is known.  Soil export is further discussed in Section 1.C. below. 

Part 1.A. MANAGING ONSITE SOIL 
If soil is anticipated to be excavated from the Brownfield Property, relocated on the Brownfields 
Property, or otherwise disturbed during site grading or other redevelopment activities, please 
provide a grading plan that clearly illustrates areas of cut and fill (approximate areas & volumes are 
acceptable, if only preliminary data available).   

1) HAZARDOUS WASTE DETERMINATION:  
a) Does the soil contain a LISTED WASTE as defined in the North Carolina Hazardous 
Waste Section under 40 CFR Part 261.31‐261.35?....................................... ☐Yes   ☒No 
☐ If yes, explain why below, including the level of knowledge regarding processes 
generating the waste (include pertinent analytical results as needed). 
Click or tap here to enter text. 

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☐ If yes, do the soils exceed the “Contained‐Out” levels in Attachment 1 of the 
North Carolina Contained‐In Policy?................................................. ☐ Yes   ☒ No 

b) NOTE: IF SOIL MEETS THE DEFINITION OF A LISTED HAZARDOUS WASTE AND EXCEEDS 
THE CONTAINED‐OUT LEVELS IN ATTACHMENT 1 TO THE NORTH CAROLINA 
CONTAINED‐IN POLICY THE SOIL MAY NOT BE RE‐USED ON SITE AND MUST BE 
DISPOSED OF IN ACCORDANCE WITH DEQ HAZARDOUS WASTE SECTION RULES AND 
REGULATIONS.     
c)  Does the soil contain a CHARACTERISTIC WASTE?.................................... ☐ Yes   ☒ No 
☐ If yes, mark reason(s) why below (and include pertinent analytical results). 
☐ Ignitability  Click or tap here to enter text.               
☐ Corrosivity Click or tap here to enter text. 
☐ Reactivity Click or tap here to enter text. 
☐ Toxicity Click or tap here to enter text. 
☐ TCLP results Click or tap here to enter text. 
☐ Rule of 20 results (20 times total analytical results for an individual 
hazardous constituent on TCLP list cannot, by test method, exceed regulatory 
TCLP standard)   
Click or tap here to enter text. 

☒ If no, explain rationale:  
Soil analytical data does not indicate detections capable of exceeding TCLP 
criteria using the Rule of 20 and does not contain a Listed Waste as defined in 
the North Carolina Hazardous Waste Section under 40 CFR Part 261.31‐261.35. 

d) NOTE: IF SOIL MEETS THE DEFINITION OF A CHARACTERISTIC HAZARDOUS WASTE, THE 
SOIL MAY NOT BE RE‐USED ON SITE AND MUST BE DISPOSED OF IN ACCORDANCE 
WITH DEQ HAZARDOUS WASTE SECTION RULES AND REGULATIONS. 

2) Screening criteria by which soil disposition decisions will be made (e.g., left in place, capped in 
place with low permeability barrier, removed to onsite location and capped, removed offsite): 
      ☒ Preliminary Health‐Based Residential SRGs  
      ☐ Preliminary Health‐Based Industrial/Commercial SRGs  
           ☒ Division of Waste Management Risk Calculator (For Brownfields Properties Only) 
    ☐ Site‐specific risk‐based cleanup level. Please provide details of methods used for 
determination/explanation.  
Click or tap here to enter text. 

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EMP Version 2, June 2018   
Additional comments:  
Click or tap here to enter text. 

3) If known impacted soil is proposed to be reused within the Brownfields Property Boundary, 
please check the measures that will be utilized to ensure safe placement and documentation of 
same.   Please attach a proposed location diagram/site map.        
☒ Provide documentation of analytical report(s) to Brownfields Project Manager 
☒ Provide documentation of final location, thickness and depth of relocated soil on site map 
to Brownfields Project Manager once known 
☒ Geotextile to mark depth of fill material.  
Provide description of material:  
The use of a geotextile is not anticipated at this time but may be considered. 

☒ Manage soil under impervious cap ☒  or clean fill ☒  
☒ Describe cap or fill:  
Should potentially impacted soil or fill materials be encountered during redevelopment that 
do not require removal for geotechnical or construction purposes and meets the definition 
of beneficial fill as outlined in the Beneficial Fill Rule (15A NCAC 13B.0562), the potentially 
impacted soil or fill materials may be placed beneath impervious surfaces (asphalt 
pavement, sidewalks, access roads, buildings, etc.) or a minimum of 2 ft of clean fill.  

☒ Confer with NC BF Project Manager if Brownfield Plat must be revised (or re‐recorded if 
actions are Post‐Recordation).         
☒ GPS the location and provide site map with final location. 
☐ Other. Please provide a description of the measure:  

4) Please describe the following action(s) to be taken during and following excavation and 
management of site soils: 
Management of fugitive dust from site 
☒ Yes, describe the method will include: 
Significant areas of contaminated soil are not expected to be encountered or disturbed 
during future Site redevelopment activities based upon previous soil sampling data.  
However, the grading contractor will take into account conditions such as wind speed, wind 
direction, and moisture content of soil during soil grading and stockpiling activities to 
minimize dust generation.  Particular attention will be paid by contractors to implement 
dust control measures as needed based on Site and atmospheric conditions (i.e., by 
controlled water application, hydro‐seeding, and/or mulch, stone, or plastic cover).  

☐ No, explain rationale: 
Click or tap here to enter text. 

Click or tap here to enter text. 

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EMP Version 2, June 2018   
Field Screening of site soil 
☒ Yes, describe the field screening method, frequency of field screening, person conducting 
field screening:  
During soil disturbance at the Site, the workers or contractors will observe soils for 
evidence of potential significantly impacted soil.  Evidence of potential impacted soil 
includes a distinct unnatural color, strong odor, or filled or previously disposed materials of 
concerns (i.e., chemicals, tanks, drums, etc.).  Should the above be noted during Site work, 
the contractor will contact the project environmental professional to observe the suspect 
condition.  If the project environmental professional confirms that the material may be 
impacted, then the procedures below will be implemented.  In addition, the DEQ 
Brownfields project manager will be contacted within 48 hours to advise that person of the 
condition. 

☐ No, explain rationale:    
Click or tap here to enter text. 

Soil Sample Collection 
☐ Yes, describe the sampling method (e.g., in‐situ grab, composite, stockpile, etc.):  
Click or tap here to enter text. 

☒ No, explain rationale:  
Collection of additional soil samples is not anticipated based on the results of previous
site assessment activities and discussions with the Brownfields Project Manager Mr.
Peter Doorn. If significant soil impact is encountered during grading and/or
installation or removal of utilities, excavation will proceed only as far as needed to
allow grading and/or construction of the utility to continue and/or only as far as
needed to allow alternate corrective measures as described below. Suspect
significantly impacted soil excavated during grading and/or utility line installation or
removal may be stockpiled and covered in a secure area to allow construction to
progress. Suspect impacted soil will be underlain by and covered with minimum 10-
mil plastic sheeting. For each approximately 1,000 yards of soil, at least one
representative soil sample consisting of 3-5 aliquots will be collected and analyzed for
SVOCs, RCRA metals and hexavalent chromium, and one grab sample collected
analyzed for VOCs. If the results of analysis of the sample indicate that the soil could
potentially exceed toxicity characteristic hazardous waste criteria, then the soil will also
be analyzed by TCLP for those compounds that could exceed the toxicity characteristic
hazardous waste criteria. Impacted soil will be handled in the manner described below
based upon the laboratory analyses:
i. If no organic compounds are detected in a sample (other than which are
attributable to sampling or laboratory artifacts) and metals are below residential PSRGs
or are consistent with background levels for metals, then the soil will be deemed
suitable for use as on-Site fill or as off-Site fill. The proposed location(s) for off-Site
placement of soil (other than a permitted facility) along with the receiving facility’s

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EMP Version 2, June 2018   
written approval for acceptance of the soil will be provided to DEQ for approval prior
to taking the soil off-Site.
ii. If detectable levels of compounds are found which do not exceed DEQ
residential PSRGs (other than which are attributable to sampling or laboratory artifacts
or which are consistent with Site-specific background levels for metals), the TCLP
concentrations are below hazardous waste criteria, and cumulative risk calculator
results are acceptable, then the soil may be used on-Site as fill without conditions.
iii. If detectable levels of compounds are found which exceed the DEQ residential
PSRGs (other than which are attributable to sampling or laboratory artifacts or which
are consistent with background levels for metals) and the TCLP concentrations are
below hazardous waste criteria, then the soil, with DEQ’s written approval, may be used
on-Site as fill below an impervious surface, at least 2 ft of compacted clean soil, or a
geotechnical fabric. If the impacted soil with concentrations above residential use
PSRGs is moved to an on-Site location, its location and depth will be documented and
provided to DEQ and the impacted soil will be placed beneath at least 2 ft of
compacted clean soil, an impervious surface, or covered with a geotechnical fabric.
iv. Impacted soil may be transported to a permitted facility such as a landfill
provided that the soil is accepted at the disposal facility. If soil is transported to a
permitted facility, the permitted facility’s written approval to dispose of soil from the
Site will be included with the final redevelopment report. In the unlikely event that the
sample data indicates concentrations above TCLP hazardous waste criteria, then the
soil must be transported off-Site to a permitted disposal facility that can accept or treat
hazardous waste.
*Please note that should the PD elect to transport export soil to a permitted facility or
to a DEQ Brownfields pre-approved receiving facility, soil will be direct loaded onto
trucks for transport off-Site. 

If soil samples are collected for analysis, please check the applicable chemical analytes: 
☒ Volatile organic compounds (VOCs) by EPA Method 8260 
☒ Semi‐volatile organic compounds (SVOCs) by EPA Method 8270 
☒ Metals RCRA List (8) (arsenic, barium, cadmium, chromium, mercury, lead, selenium 
and silver): Specify Analytical Method Number(s): 
EPA Method 6020/7471

☐ Pesticides: Specify Analytical Method Number(s):  
Click or tap here to enter text.

☐ PCBs: Specify Analytical Method Number(s):  
Click or tap here to enter text.

☒ Other Constituents & Respective Analytical Method(s) (i.e. Hexavalent Chromium, 
Herbicides, etc.): Specify Analytical Method Number(s): 
Hexavalent chromium by EPA Method 7199 

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EMP Version 2, June 2018   

☒ Check to confirm that stockpiling of known or suspected impacted soils will be conducted 
in accordance with Figure 1 of this EMP.  Stockpile methodology should provide erosion 
control, prohibiting contact between surface water/precipitation and contaminated soil, 
and preventing contaminated runoff.  Explain any variances or provide additional details as 
needed: 

☒ Final grade sampling of exposed native soil (i.e., soil that will not be under buildings or 
permanent hardscape). Select chemical analyses for final grade samples with check boxes 
below (Check all that apply): 
☒ Volatile organic compounds (VOCs) by EPA Method 8260 
☒ Semi‐volatile organic compounds (SVOCs) by EPA Method 8270 
☒ Metals RCRA List (8) (arsenic, barium, cadmium, chromium, mercury, lead, 
selenium and silver): Specify Analytical Method Number(s): 
EPA Methods 6020/7471

☐ Pesticides: Specify Analytical Method Number(s):    
Click or tap here to enter text.

☐ PCBs: Specify Analytical Method Number(s):  
Click or tap here to enter text.

☒ Other Constituents & Respective Analytical Method(s) (i.e. Hexavalent 
Chromium, Herbicides, etc.):  
Hexavalent chromium by EPA Method 7199 

Please provide a scope of work for final grade sampling, including a diagram of soil 
sampling locations, number of samples to be collected, and brief sampling methodology.  
Samples should be collected from 0‐2 ft below ground surface, with the exception of VOCs 
which should be taken from 1‐2 ft below ground surface.  Alternatively, a work plan for 
final grade sampling may be submitted under separate cover. 
Following completion of soil disturbance for any future Site development (i.e. after grading 
and utility construction), an environmental professional will be contracted to assess the 
Site for areas that are not covered with a minimum of 2 ft of demonstrable clean fill soil or 
topsoil from a landscaping company, building foundations, sidewalks, or asphalt or 
concrete parking areas, driveways or other impervious surfaces.  If such areas exist, a Work 
Plan will be prepared for final grade sampling for DEQ review and approval.  If no such 
areas exist, documentation will be provided to DEQ.    

☐ If final grade sampling was NOT selected please explain rationale: 
Click or tap here to enter text. 

Click or tap here to enter text. 

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EMP Version 2, June 2018   
Part 1.B. IMPORTED FILL SOIL 

NO SOIL MAY BE BROUGHT ONTO THE BROWNFIELDS PROPERTY WITHOUT PRIOR APPROVAL 
FROM THE BROWNFIELDS PROGRAM.  According to the Brownfields IR 15, “Documenting 
imported soil (by sampling, analysis, and reporting in accordance with review and written 
approval in advance by the Brownfields Program), will safeguard the liability protections provided 
by the brownfields agreement and is in the best interest of the prospective developer/property 
owner.” 

Requirements for importing fill: 

1) Will fill soil be imported to the site?................................................ ☐ Yes  ☐ No  ☒ Unknown 

2) If yes, what is the estimated volume of fill soil to be imported?  
Based on preliminary grading plans, it does not appear that beneficial fill will need to be imported 
to the Site to achieve the desired grades.  However, the PD plans to import limited amounts of 
organic rich topsoil from a commercial landscape material vendor for use in proposed landscaped 
areas. 

3) If yes, what is the anticipated depth that fill soil will be placed at the property? (If a range 
of depths, please list the range.) 
Soil will be cut from the central, southeastern, and southern portions of the Site, which will be 
used as beneficial fill as appropriate in the western, northwestern, and northeastern portions of 
the Site.  The beneficial fill will raise the grade between < 1 ft to 6 ft above the current grade.    In 
addition, landscaped areas will be topped with organics rich topsoil.    

4) Provide the source of fill, including: location, site history, nearby environmental concerns, 
etc. Attach aerial photos, maps, historic Sanborn maps and a borrow source site history: 
Although not anticipated, the procedures outlined below will be followed if additional fill soil is 
needed on‐Site. 

5) PRIOR TO ITS PLACEMENT AT THE BROWNFIELDS PROPERTY, provide a plan to analyze fill 
soil to demonstrate that it meets acceptable standards applicable to the site and can be 
approved for use at the Brownfields property. 
Although not anticipated, the PD plans to pursue import soil from: 1) another Brownfields 
property with appropriate soil characterization and with approval from NC DEQ Brownfields; 
and/or 2) from a pre‐approved borrow site (e.g., the Vulcan Quarry in Pineville, NC or the Martin 
Marietta – Beatties Ford Rd Quarry in Charlotte, NC, see below) if needed.   

For other potential soil import properties, the fill soil will be sampled and approved by DEQ 
Brownfields prior to being brought to the Site to demonstrate that imported soil is suitable for 
use at a proposed residential property.  A sampling plan will be developed and submitted for 
DEQ Brownfields review under separate cover and will generally consist of one sample per 1,000 
cubic yards consisting of a minimum 3 composite samples for non‐VOC analysis and a grab 
sample for VOC analysis based on field screening results (e.g., odor, PID readings, staining, etc.).  

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DEQ approval of the sampling plan and analytical results is required prior to bringing soil on Site.  
Soil will be considered suitable for use at the Site if it does not contain compound concentrations 
above residential PSRGs or Site‐specific background levels for metals.  The PD plans to import 
limited amounts of organic rich topsoil from a commercial landscape material vendor for use in 
proposed landscaped areas.  The PD does not plan to collect samples of landscaping materials 
prior to placement at the Site. 

6) Please check the applicable chemical analytes for fill soil samples.  (Check all that apply): 
☒ Volatile organic compounds (VOCs) by EPA Method 8260 
☒ Semi‐volatile organic compounds (SVOCs) by EPA Method 8270 
☒ Metals RCRA List (8) (arsenic, barium, cadmium, chromium, mercury, lead, 
selenium and silver): Specify Analytical Method Number(s): 
6020/7471

☐ Pesticides: Specify Analytical Method Number(s):    
Click or tap here to enter text.

☐ PCBs: Specify Analytical Method Number(s):  
Click or tap here to enter text.

☒ Other Constituents & Respective Analytical Method(s) (i.e. Hexavalent 
Chromium, Herbicides, etc.):  
Hexavalent chromium by EPA Method 7199 

7) The scope of work for import fill sampling may be provided below or in a Work Plan 
submitted separately for DEQ review and approval.  Attach specific location maps for in‐situ 
borrow sites.  If using a quarry, provide information on the type of material to be brought 
onto the Brownfields Property. 
Although not anticipated, if beneficial fill is needed for import to the Site, the PD will follow the 
procedures outlined below. 

If the PD plans to import fill material from the Vulcan Materials Company quarry located near 
Pineville, NC or from the Martin Marietta ‐ Beatties Ford Road quarry located in Charlotte, NC, 
and given that the material is virgin cut soil from said quarry, no samples of the import material 
will be collected as adequate analytical data is available in the DEQ Brownfields database to 
demonstrate material from these facilities is suitable for use as structural fill at a Brownfields 
property.   

If fill soil is obtained from an off‐Site property that is not a known permitted quarry, a sampling 
plan will be developed and submitted for DEQ review.  DEQ approval of the sampling plan and 
analytical results will be obtained prior to transporting import soil to the Site.  The specific 
sampling rate will be outlined in the aforementioned sampling plan.  However, if the proposed 
borrow source has not been previously developed (i.e., virgin land), soil samples will be collected 

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EMP Version 2, June 2018   
for laboratory analyses indicated above at a general rate of one per 1,000 cubic yards.  If the 
borrow source property has been previously developed, soil samples will be collected for 
laboratory analyses indicated above at a general rate of approximately one per 500 cubic yards. 
As described above, sampling will consist of a minimum 3 point composite sample for non‐VOC 
analysis and a grab sample for VOC analysis based on field screening results.  Fill soil will be 
considered suitable for use at the Site if it does not contain compound concentrations above DEQ 
residential PSRGs or typical metals concentrations which are consistent with background levels 
identified at the Site. 

The PD does not plan to collect samples of landscaping materials (acquired from a commercial 
vendor) prior to placement at the Site.  DEQ Brownfields will be notified of the volume of 
landscaping material needed and the proposed source of the material prior to placement in 
proposed landscaping areas. 

Part 1.C. EXPORTED SOIL 

NO SOIL MAY LEAVE THE BROWNFIELDS PROPERTY WITHOUT APPROVAL FROM THE 
BROWNFIELDS PROGRAM.  FAILURE TO OBTAIN APPROVAL MAY VIOLATE A BROWNFIELDS 
AGREEMENT CAUSING A REOPENER OR JEOPARDIZING ELIGIBILITY IN THE PROGRAM, 
ENDANGERING LIABILITY PROTECTIONS AND MAKING SAID ACTION POSSIBLY SUBJECT TO 
ENFORCEMENT.  JUSTIFICATIONS PROVIDED BELOW MUST BE APPROVED BY THE PROGRAM IN 
WRITING PRIOR TO COMPLETING TRANSPORT ACTIVITIES.  Please refer to Brownfields IR 15 for 
additional details.  

1) If export from a Brownfields Property is anticipated, please provide details regarding the 
proposed export actions.  Volume of exported soil, depths, location from which soil will 
be excavated on site, related sampling results, etc. Provide a site map with locations of 
export and sampling results included. 
As noted above, approximately 215 cubic yards (CYs) of export soil is expected to be generated 
to achieve the desired grade and implement positive drainage across the Site.  An additional 
approximately 4,405 CYs of spoils comprised of asphalt, gravel, and surficial soil is expected to be 
exported off‐Site and disposed of off‐site at a Municipal Solid Waste Landfill (MSWLF, e.g., 
Speedway Landfill in Concord, NC) or a Land Clearing and Inert Debris (LCID) landfill.  Should soil 
or buried debris need to be exported from the Brownfields property during redevelopment to 
another export property (i.e., another Brownfields property), a sampling plan will be developed 
and submitted to DEQ Brownfields for review and approval.  Generally, soil samples will be 
collected from soil intended for an approved export property at a rate of 1 sample per every 
1,000 cubic yards of export material which will include a minimum of three combined composite 
locations and one grab location.  Export soil sampling may be conducted in‐situ prior to onset of 
grading and an In‐Situ Soil Characterization Assessment Work Plan will be provided to DEQ for 
review and approval.   

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EMP Version 2, June 2018   
DEQ approval of the sampling plan and analytical results will be obtained prior to transporting 
export soil from the Site.  Based on analytical results of soil samples collected from the export 
soil, the soil will be transported off‐Site to a suitable location.  The PD will notify DEQ 
Brownfields of the location receiving the export soil.  If not a permitted facility (i.e., another 
Brownfields property), DEQ Brownfields approval and written approval from the receiving facility 
will be obtained prior to transporting the soil off‐Site.   

2) To what type of facility will the export Brownfields soil be sent?  
☒ Subtitle D/Municipal Solid Waste Landfill (analytical program to be determined by 
landfill) 
☒ Permitted but Unlined Landfill (i.e. LCID, C&D, etc.) Analytical program to be 
determined by the accepting Landfill;  
☒ Landfarm or other treatment facility  
☒ Use as fill at another suitable Brownfields Property – determination that a 
site is suitable will require, at a minimum, that similar concentrations of the same or 
similar contaminants already exist at both sites, use of impacted soil will not increase 
the potential for risk to human health and the environment at the receiving Brownfields 
property, and that a record of the acceptance of such soil from the property owner of 
the receiving site is provided to Brownfields.  Please provide additional details below.  
☒ Use as Beneficial Fill off‐site at a non‐Brownfields Property ‐ Please provide 
documentation of approval from the property owner for receipt of fill material.  This will 
also require approval by the DEQ Solid Waste Section.  Additional information is 
provided in IR 15.  Please provide additional details below.  

3) Additional Details: (if transfer of soil to another property is requested above, please provide 
details related to the proposed plans). 
The environmental professional will contact DEQ Brownfields to obtain DEQ Brownfields 
approval prior to exporting soil to a non‐permitted facility (i.e., landfill).  If soils are transferred 
to another Brownfields Property, DEQ Brownfields approval will be obtained prior to transport. 

Part 1.D. MANAGEMENT OF UTILITY TRENCHES 

☐ Install liner between native impacted soils and base of utility trench before filling with clean fill 
(Preferred) 

☒ Last out, first in principle for impacted soils (if soil can safely be reused onsite and is not a 
hazardous waste), i.e., impacted soils are placed back at approximately the depths they 
were removed from such that impacted soil is not placed at a greater depth than the original 
depth from which it was excavated. 

☒ Evaluate whether necessary to install barriers in conduits to prevent soil vapor transport, 
and/or degradation of conduit materials due to direct impact with contaminants? 

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EMP Version 2, June 2018   
☒ If yes, provide specifications on barrier materials: 
Results of soil vapor assessment activities completed in the eastern portion of the Site reported 
numerous trace levels of VOCs were detected in the soil gas and sub‐slab vapor samples, which is 
typical of such datasets.  According to the results, benzene was detected in soil gas SG‐1 (52 
micrograms per cubic meter [µg/m3]) above the DWM Residential Sub‐Slab and Exterior Soil Gas 
Screening Level of 12 µg/m3.  In addition, TCE was detected in soil gas point SG‐1 at a 
concentration of 1,400 µg/m3 above the DWM Residential and Non‐Residential Sub‐Slab and 
Exterior Soil Gas Screening Levels of 14 µg/m3 and 180 µg/m3.   
The calculated LICRs for a resident and a non‐residential worker were within or below the 
acceptable risk range of 1 x10‐4 to 1 x 10‐6 for the constituents detected in the vapor samples 
collected from SG‐1 (eastern portion of the Site) in January 2021.  However, for a residential and 
non‐residential exposure scenario, the calculated HI exceeds the acceptable level of 1 in the SG‐1 
sample location (20 and 1.6, respectively) that pose unacceptable vapor intrusion risks for future 
residents.  Appropriate safety screening will be performed to protect workers during utility 
installation or other activities which disturb the slab.  In the event impacted soil vapors are 
encountered during future redevelopment activities, worker breathing zone will be monitored 
using a calibrated photoionization detector (PID).  If results indicate further action is warranted, 
appropriate engineering controls (such as use of industrial fans) will be implemented.   

☐ If no, include rationale here: 
Click or tap here to enter text. 

Other comments regarding managing impacted soil in utility trenches:  
The environmental professional will remain on call on an as‐needed‐basis during redevelopment 
activities at the Site.  In the event suspected contaminated soil and/or vapors are encountered in 
utility trenches during redevelopment activities (based on observed soil staining or discoloration, 
unusual and/or strong odors, or physical effects such as dizziness, lightheadedness, coughing, 
difficulty breathing, etc.), the trench will be evacuated, and the environmental professional will be 
called to perform appropriate safety screening of the soil/vapors.  Safety screening activities include 
screening the soil using a PID and monitoring the worker breathing zone with a multi‐gas monitor (or 
similar instrument[s] capable of detecting VOCs and combustible gases).   

If the environmental professional confirms that the material may be impacted, then the procedures 
outlined in Part 1.A. Managing On‐Site Soil above will be implemented and appropriate engineering 
controls (such as the use of industrial fans) will be implemented.  In addition, the environmental 
professional will contact the DEQ Brownfields project manager within 48 hours to advise that person 
of the condition.  

PART 2. GROUNDWATER – Please fill out the information below. 

1) What is the depth to groundwater at the Brownfields Property? 
Depth to groundwater at the Site has ranged from approximately 5 ft bgs to 10 ft bgs. 

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EMP Version 2, June 2018   

2) Is groundwater known to be contaminated by ☐onsite  ☐offsite   ☒both or ☐unknown 
sources?  Describe source(s):  
A tabular summary of historical groundwater analytical data in comparison to the North Carolina 
Administrative Code (NCAC) 2L Groundwater Standards (2L Standards) and non‐residential Vapor 
Intrusion Groundwater Screening Levels (GWSLs) is included as Table 2, and groundwater sample 
locations are presented on Figure 3.  A summary is provided below.  

VOCs 
In 2019, trichloroethylene (TCE) and tetrachloroethylene (PCE; reported as an estimated J‐flag 
value) were detected in the groundwater sample collected from TMW‐1 located on the 2300 
Distribution St. parcel at concentrations above NCAC 2L Groundwater Quality Standards (2L 
Standards).   

In 2021, vinyl chloride was detected in TW‐4 (32 µg/L) and TW‐5 (2.2 µg/L) above the 2L 
Standard and residential vapor intrusion GWSL on the 2321 S. Tryon Street parcel during 
Brownfields assessment activities.  In addition, 1,4‐dioxane was detected at estimated 
concentrations (J ‐value) of 25 J µg/L and 19 J µg/L, respectively, above the 2L Standard of 3 
µg/L. 

SVOCs 
SVOCs were not detected above NC DEQ 2L Groundwater Quality Standards in samples 
collected at the Site.   

Metals 
Metals were not detected above NC DEQ 2L Groundwater Quality Standards in samples collected 
at the Site.   

3) What is the direction of groundwater flow at the Brownfields Property?  
Based on groundwater elevation data, groundwater is expected toward a drainage feature 
located in the central portion of the Site that conveys stormwater in a west‐northwesterly flow 
direction towards Irwin Creek.  

4) Will groundwater likely be encountered during planned redevelopment activities?    
☐Yes    ☒No  
If yes, describe these activities: 
The capillary fringe and possibly shallow groundwater may be encountered during the proposed 
redevelopment of the Site.  See below for groundwater management procedures in the event 
that groundwater is encountered. 

Regardless of the answer; in the event that contaminated groundwater is encountered 
during redevelopment activities (even if no is checked above), list activities for contingent 
management of groundwater (e.g., dewatering of groundwater from excavations or 
foundations, containerizing, offsite disposal, discharge to sanitary sewer, NPDES permit, or 
sampling procedures).  
Appropriate worker safety measures will be undertaken if groundwater gathers in an open 
excavation within an area determined to be impacted (based on previous sampling data, strong 
odor, unnatural color, sheen, etc.) during construction activities.  The accumulated water will be 

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EMP Version 2, June 2018   
allowed to evaporate/infiltrate to the extent time for dissipation does not disrupt the 
construction schedule.  Should the time needed for natural dissipation of accumulated water be 
deemed inadequate, an environmental professional will be contacted and the water will be 
tested and disposed off‐Site (if impacted), tested and discharged to the storm sewer (if not 
impacted above DEQ surface water standards) in accordance with applicable municipal and 
State regulations for erosion control and construction stormwater control, or used for dust 
control at the Site (with Brownfields prior approval).  In addition, the environmental 
professional will contact the DEQ Brownfields project manager within 48 hours regarding the 
condition.  

5) Are monitoring wells currently present on the Brownfields Property?.................☐Yes   ☒No    
If yes, are any monitoring wells routinely monitored through DEQ or other 
agencies?..................................................................................................................☐Yes   ☐No  

6) Please check methods to be utilized in the management of known and previously 
unidentified wells.   
☒ Abandonment of site monitoring wells in accordance with all applicable regulations.  It 
is the Brownfields Program’s intent to allow proper abandonment of well(s) as 
specified in the Brownfields Agreement, except if required for active monitoring 
through another section of DEQ or the EPA.   
☐ Location of existing monitoring wells marked 
☐ Existing monitoring wells protected from disturbance  
☒ Newly identified monitoring wells will be marked and protected from further 
disturbance until notification to DEQ Brownfields can be made and approval for 
abandonment is given. 

7) Please provide additional details as needed:   

Please note, disturbance of existing site monitoring wells without approval by DEQ is not 
permissible.  If monitoring wells are damaged and/or destroyed, DEQ may require that the PD 
be responsible for replacement of the well.   

PART 3. SURFACE WATER ‐Please fill out the information below. 
1) Is surface water present at the property?  ☐ Yes ☒ No 
2) Attach a map showing the location of surface water at the Brownfields Property. 
3) Is surface water at the property known to be contaminated? ☐ Yes  ☒ No 
4) Will workers or the public be in contact with surface water during planned redevelopment 
If unknown monitoring wells or water supply wells are identified during redevelopment activities, 
monitoring wells will be properly abandoned by a NC‐licensed well driller.  DEQ will be notified 10 
days prior to abandonment of the existing monitoring wells.  

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EMP Version 2, June 2018   
activities?    ☐ Yes  ☒ No 
5) In the event that contaminated surface water is encountered during redevelopment 
activities, or clean surface water enters open excavations, list activities for management of 
such events (e.g. flooding, contaminated surface water run‐off, stormwater impacts): 
If surface water run‐off gathers in an open excavation within an area determined to be impacted 
during construction activities, appropriate worker safety measures will be undertaken.  The 
accumulated water will be allowed to evaporate (if feasible), tested and disposed off‐Site (if 
impacted), tested and discharged to the storm sewer (if not impacted above DEQ surface water 
standards) in accordance with applicable municipal and State regulations for erosion control and 
construction stormwater control, or used for dust control at the Site (with Brownfields prior 
approval).  In addition, the environmental professional will contact the DEQ Brownfields project 
manager within 48 hours regarding the condition. 

PART 4. SEDIMENT – Please fill out the information below. 

1) Are sediment sources present on the property?  ☐ Yes  ☒ No 

2) If yes, is sediment at the property known to be contaminated: ☐ Yes  ☒ No 

3) Will workers or the public be in contact with sediment during planned redevelopment 
activities?   ☐ Yes ☒ No 

4) Attach a map showing location of known contaminated sediment at the property. 

5) In the event that contaminated sediment is encountered during redevelopment activities, list 
activities for management of such events (stream bed disturbance): 
No surface water features or associated areas of sediment deposit are present on the subject Site. 

PART 5.  SOIL VAPOR – Please fill out the information below. 

1) Do concentrations of volatile organic compounds at the Brownfields property exceed the 
following vapor intrusion screening levels (current version) in the following media: 
IHSB Residential Screening Levels: 
Soil Vapor:………..☒ Yes ☐ No  ☐ Unknown 
Groundwater:.….☒ Yes ☐ No ☐ Unknown 
IHSB Industrial/Commercial Screening Levels: 
Soil Vapor:………..☒ Yes ☐ No ☐ Unknown 
Groundwater:…..☒ Yes ☐ No ☐ Unknown 
2) Attach a map showing the locations of soil vapor contaminants that exceed site 

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EMP Version 2, June 2018   
screening levels.  
3) If applicable, at what depth(s) is soil vapor known to be contaminated?  

4) Will workers encounter contaminated soil vapor during planned redevelopment activities? 
  ☐ Yes  ☐ No ☒ Unknown 
5) In the event that contaminated soil vapor is encountered during redevelopment activities 
(trenches, manways, basements or other subsurface work,) list activities for management 
of such contact:  
The environmental professional will remain on call on an as‐needed‐basis during redevelopment 
activities at the Site.  If contaminated soil vapors are suspected during redevelopment activities 
(based on unusual or strong odors, dizziness, lightheadedness, coughing, difficulty breathing, 
etc.), the excavation area will immediately be evacuated, and the environmental professional will 
be called to perform appropriate safety screening of the vapors.  Safety screening activities 
include monitoring the worker breathing zone with a calibrated multi‐gas monitor (or similar 
instrument[s] capable of detecting VOCs and combustible gases).  If results indicate further 
action is warranted, appropriate engineering controls (such as use of industrial fans) will be 
implemented.  In addition, the environmental professional will contact the DEQ Brownfields 
project manager within 48 hours regarding the condition. 

PART 6.  SUB‐SLAB SOIL VAPOR – Please fill out the information below if existing buildings or 
foundations will be retained in the redevelopment. 
1) Are sub‐slab soil vapor data available for the Brownfields Property? ☒ Yes   ☐ No   ☐ Unknown 
2) If data indicate that sub‐slab soil vapor concentrations exceed screening levels, attach a map 
showing the location of these exceedances. 
3) At what depth(s) is sub‐slab soil vapor known to be contaminated? ☐0‐6 inches ☒Other, please 
describe:   
Previous Brownfields assessment included the collection of nine (9) soil gas vapor samples from eight 
(8) sub‐slab vapor points (SS‐1 to SS‐8) and one (1) soil gas vapor point (SG‐1) located across the 
Brownfields Site.  The soil gas vapor samples were collected at a depth of 5 ft bgs.  The sub‐slab 
samples were collected directly below the sub‐slab of the existing Site buildings. 

Benzene was detected in the soil gas sample, SG‐1 (52 µg/m3) above the DWM Residential Sub‐Slab 
and Exterior Soil Gas Screening Level of 12 µg/m3.  In addition, TCE was detected in soil gas point SG‐1 
at a concentration of 1,400 µg/m3, which is above the DWM Residential and Non‐Residential Sub‐Slab 
and Exterior Soil Gas Screening Levels of 14 µg/m3 and 180 µg/m3.  VOCs were not detected above 
screening levels in the sub‐slab vapor samples collected from SS‐1 to SS‐8. 

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EMP Version 2, June 2018   
As noted above, TCE and benzene were detected in the SG‐1 soil gas sample collected at a depth 
of 5 ft bgs on the 2300 Distribution St. parcel located in the eastern portion of the Brownfields 
Site.  Note, sub‐slab vapor samples (SS‐1 and SS‐2) collected within the building located at 2300 
Distribution St. did not report VOCs at concentrations above DEQ vapor screening levels.   

4) Will workers encounter contaminated sub‐slab soil vapor during planned redevelopment 
activities? ☐ Yes   ☐ No   ☒ Unknown 
5) In the event that contaminated soil vapor is encountered during redevelopment activities, list 
activities for management of such contact 
The environmental professional will remain on call on an as‐needed‐basis during redevelopment 
activities at the Site.  If contaminated soil vapors are suspected during redevelopment activities 
(based on unusual or strong odors, dizziness, lightheadedness, coughing, difficulty breathing, 
etc.), the excavation area will immediately be evacuated, and the environmental professional will 
be called to perform appropriate safety screening of the vapors.  Safety screening activities 
include monitoring the worker breathing zone with a calibrated PID and multi‐gas monitor (or 
similar instrument[s] capable of detecting VOCs and combustible gases).  If results indicate 
further action is warranted, appropriate engineering controls (such as use of industrial fans) will 
be implemented.  In addition, the environmental professional will contact the DEQ Brownfields 
project manager within 48 hours regarding the condition. 

PART 7. INDOOR AIR – Please fill out the information below. 

1) Are indoor air data available for the Brownfields Property? ☐ Yes   ☒ No   ☐ Unknown 
2) Attach a map showing the location(s) where indoor air contaminants exceed site screening levels. 
3) If the structures where indoor air has been documented to exceed risk‐based screening levels will 
not be demolished as part of redevelopment activities, will workers encounter contaminated 
indoor air during planned redevelopment activities? ☐ Yes   ☒ No   ☐ Unknown 
4) In the event that contaminated indoor air is encountered during redevelopment activities, list 
activities for management of such contact: 

In the unlikely event there is evidence of potential indoor air issues (based on unusual or strong 
odors, dizziness, lightheadedness, coughing, difficulty breathing, etc.) during redevelopment 
activities, the area will be evacuated, and appropriate safety screening of the indoor air will be 
performed. If warranted, safety screening procedures will include periodically screening indoor air 
for volatile organic vapors with a calibrated PID.  If results indicate further action is warranted, 
appropriate engineering controls (such as use of industrial fans) will be implemented.  In addition, 
the environmental professional will contact the DEQ Brownfields project manager within 48 hours 
regarding the condition.

25 
EMP Version 2, June 2018   

VAPOR INTRUSION MITIGATION SYSTEM – Please fill out the information below. 
Is a vapor intrusion mitigation system (VIMS) proposed for this Brownfields Property? 
☒ Yes   ☐ No   ☐ Unknown 
If yes, ☐ VIMS Plan Attached or ☒ VIMS Plan to be submitted separately   
If submitted separately provide date:  
The potential for vapor intrusion into the proposed future Site building will be managed through 
a Vapor Intrusion Mitigation Plan (VIMP) that will be sealed by a NC Professional Engineer and 
submitted to DEQ for approval under separate cover.  The existing vacant Site buildings currently 
present on the Site will remain vacant and will be demolished so VMSs are not proposed in these 
structures. 

VIMS Plan shall be signed and sealed by a NC Professional Engineer 

If no, please provide a brief rationale as to why no vapor mitigation plan is warranted:  
Click or tap here to enter text. 

CONTINGENCY PLAN – encountering unknown tanks, drums, or other waste materials 

In this section please provide actions that will be taken to identify or manage unknown 
potential new sources of contamination.   During redevelopment activities, it is not uncommon 
that unknown tanks, drums, fuel lines, landfills, or other waste materials are encountered.  
Notification to DEQ Brownfields Project Manager, UST Section, Fire Department, and/or other 
officials, as necessary and appropriate, is required when new potential source(s) of 
contamination are discovered.  These Notification Requirements were outlined on Page 1 of this 
EMP.   

Should potentially impacted materials be identified that are inconsistent with known site 
impacts, the DEQ Brownfields Project Manager will be notified and a sampling plan will be 
prepared based on the EMP requirements and site‐specific factors.  Samples will generally be 
collected to document the location of the potential impacts.   

Check the following chemical analysis that are to be conducted on newly identified releases: 
☒ Volatile organic compounds (VOCs) by EPA Method 8260 
☒ Semi‐volatile organic compounds (SVOCs) by EPA Method 8270 
☒ Metals RCRA List (8) (arsenic, barium, cadmium, chromium, mercury, lead, selenium and 
silver) 
EPA Methods 6020/7471 

26 
EMP Version 2, June 2018   
☐ Pesticides: Specify Analytical Method Number(s):  
Click or tap here to enter text. 

☐ PCBs: Specify Analytical Method Number(s):  
Click or tap here to enter text. 

☒ Other Constituents & Analytical Method(s) (i.e. Hexavalent Chromium, Herbicides, etc.) 
Please note, if field observations indicate the need for additional analyses, they should 
be conducted, even if not listed here.  
Hexavalent chromium by EPA Method 7199 

Please provide details on the proposed methods of managing the following commonly 
encountered issues during redevelopment of Brownfields Properties. 
During construction activities, contractors may encounter unknown sub‐surface environmental 
conditions (i.e. tanks, drums, or waste materials) that if encountered, will require proper 
management.  Prior to beginning Site work, environmental professional will attend a pre‐
construction kick‐off meeting with the PD and the redevelopment contractors to discuss the DEQ 
approved EMP and various scenarios when it would be appropriate and necessary to notify the 
environmental professional of the discovery of unknown subsurface features or potentially 
impacted media at the Site.   

In the event that such conditions are encountered during Site redevelopment activities, the 
environmental actions noted below will be used to direct environmental actions to be taken during 
these activities and sampling data for potentially impacted soil and the disposition of impacted soil 
will be provided to DEQ when the data becomes available.  

Underground Storage Tanks:  
In the event a previously unidentified UST (orphan UST) or impacts suspected to be associated with 
a previously removed UST are discovered at the Site during redevelopment activities, the orphan 
UST removal and/or previously removed UST‐related impacts will be addressed through the DEQ 
Brownfields Program. 

If the orphan UST contains residual fluids, the fluids will be removed, sampled for VOCs, SVOCs, and 
RCRA metals, and transported off‐Site for disposal at a suitable facility based on the laboratory 
analytical results.  Impacted soil will be managed in accordance with Part 1.A. above and UST 
removal will be addressed in coordination with the DEQ Brownfields Program.  In addition, if‐
impacted soil is to be removed, confirmation sampling will be conducted at representative locations 
in the base and the sidewalls of the excavation after the waste or significantly impacted media is 
removed.  The confirmation samples will be analyzed for VOCs, SVOCs, and RCRA metals plus 
hexavalent chromium.  Areas of suspected contaminated soil that remain at the Site after 
excavation is complete above the residential PSRGs will be managed pursuant to this plan and 
incorporated into the final Brownfields Plat.                                                 

27 
EMP Version 2, June 2018   
Sub‐Grade Feature/Pit: 
If a sub‐grade feature or pit is encountered during redevelopment, it will be removed in 
coordination with the DEQ Brownfields Program.  If the pit has waste in it, the waste will be set 
aside in a secure area and will be sampled for waste disposal purposes for TCLP VOCs, SVOCs, and 
metals and disposed off‐Site at a permitted facility or the waste will be managed in accordance with 
Part 1.A. above, whichever is most applicable based on the type of waste present.  If the observed 
waste characteristics indicate the concrete in the pit may potentially be contaminated to a 
significant degree, the concrete will be sampled and analyzed by methods specified by the disposal 
facility.  In addition, if impacted soil is to be removed, confirmation sampling will be conducted at 
representative locations in the base and the sidewalls of the excavation after the waste or 
significantly impacted media is removed.  The confirmation samples will be analyzed for VOCs, 
SVOCs, and RCRA metals plus hexavalent chromium.  Areas of suspected contaminated soil that 
remain at the Site after excavation is complete above the residential PSRGs will be managed 
pursuant to this plan and incorporated into the final Brownfields Plat.  

Buried Waste Material: 
If excavation activities result in removal of buried wastes or significantly impacted soils, the 
contractor will be directed to stop work at that location and notify the environmental professional.  
The environmental professional will review the soil/materials and collect samples if warranted.  
Additionally, the Brownfields Project Manager will be consulted regarding the management of 
potentially impacted soil or buried waste materials (if encountered).  If the buried materials or soil 
do not require removal for geotechnical or construction purposes, meets the definition of beneficial 
fill as outlined in the Beneficial Fill Rule (15A NCAC 13B.0562), and based on the sample results (as 
discussed in Part 1.A. above), they will remain in‐place and construction will proceed.  In addition, if 
the fill material is to be removed, confirmation sampling will be conducted at representative 
locations in the base and the sidewalls of the excavation after the waste or significantly impacted 
media is removed.  The confirmation samples will be analyzed for VOCs, SVOCs, and RCRA metals 
plus hexavalent chromium.  Areas of suspected contaminated soil that remain at the Site after 
excavation is complete above the residential PSRGs will be managed pursuant to this plan and 
incorporated into the final Brownfields Plat. 

Re‐Use of Impacted Soils On‐Site: 
Please refer to Part 1.A. above. 

If unknown, impacted soil is identified on‐site, management on‐site can be considered after the 
project team provides the necessary information, outlined in Part 1.A. Item 11, for Brownfields 
Project Manager approval prior to final placement on‐site.  

If other potential contingency plans are pertinent, please provide other details or scenarios as 
needed below: 
Click or tap here to enter text. 

28 
EMP Version 2, June 2018   
POST‐REDEVELOPMENT REPORTING 
☒Check this box to acknowledge that a Redevelopment Summary Report will be required for the
project.  If the project duration is longer than one year, an annual update is required and will be
due by January 31 of each year, or 30 days after each one‐year anniversary of the effective date of
this EMP (as agreed upon with the Project Manager).  These reports will be required for as long as
physical redevelopment of the Brownfields Property continues, except that the final
Redevelopment Summary Report will be submitted within 90 days after completion of
redevelopment.  Based on the estimated construction schedule, the first Redevelopment Summary
Report is anticipated to be submitted on 1/31/2022
The Redevelopment Summary Report shall include environment‐related activities since the last 
report, with a summary and drawings, that describes:  
1.actions taken on the Brownfields Property;
2.soil grading and cut and fill actions;
3.methodology(ies) employed for field screening, sampling and laboratory analysis of
environmental media;
4.stockpiling, containerizing, decontaminating, treating, handling, laboratory analysis and
ultimate disposition of any soil, groundwater or other materials suspected or confirmed
to be contaminated with regulated substances; and
5.removal of any contaminated soil, water or other contaminated materials (for example,
concrete, demolition debris) from the Brownfields Property (copies of all legally required
manifests shall be included).
☒Check box to acknowledge consent to provide a NC licensed P.G. or P.E. sealed, Redevelopment
Summary Report in compliance with the site’s Brownfields Agreement.
12-7-2021
12/7/2021

30 
EMP Version 2, June 2018   

Appendix A

Preliminary Site Plan
R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/W R/W R/W R/W R/W R/WR/W R/W R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/W
R/WR/WR/WR/WR/WR/W R/W R/W R/W R/W R/W R/WR/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/WR/W R/W R/W R/W R/W R/W R/W R/WR/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/WR/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/WR/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/WR/W R/W R/W R/W R/W R/W R/W R/W R/W R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WFIRECLAYPURISTK-2314LAVATORY FIRECLAYPURISTK-2314LAVATORY
FIRECLAYPURISTK-2314LAVATORY FIRECLAYPURISTK-2314LAVATORY
VITREOUS CHINAWALL HUNG TOILETVEILK-6303
VITREOUS CHINAWALL HUNG TOILETVEILK-6303
VITREOUS CHINAWALL HUNG TOILETVEILK-6303
SYNCHRO 700 TVSYNCHRO 700 TVFIRECLAYPURISTK-2314LAVATORY
VITREOUS CHINAWALL HUNG TOILETVEILK-6303
FIRECLAYPURISTK-2314LAVATORY
VITREOUS CHINAWALL HUNG TOILETVEILK-6303
VITREOUS CHINAWALL HUNG TOILETVEILK-6303 ENTRYCLOSINGROOMLOBBYLEASINGCO-WORK /MAIL ROOMPARCELLOCKERROOMWORK /BREAKROOMSCREENINGROOMLOGGIAFITNESSPANTRYTABLECLUBROOMC O R R I D O RMEN'SRESTROOMWOMEN'SRESTROOMRESTROOMRESTROOMMANAGER'SOFFICEASSISTANTMANAGER'SOFFICEFIREPLACESITTINGAREALEASINGAUXILLARYROOMAV / ITROOMCORRIDORPOURSTRIP
KEY MAPSEALSHEET NUMBERSHEET TITLELANDDESIGN PROJ.#SCALEPROJECTNORTHNO.DESCRIPTIONDATEREVISION / ISSUANCEORIGINAL SHEET SIZE: 30" X 42"VERT:HORZ:CHECKED BY:DRAWN BY:DESIGNED BY:223 NORTH GRAHAM STREETCHARLOTTE, NC 28202704.333.0325WWW.LANDDESIGN.COMTHESE DOCUMENTS ARE FOR DESIGNREVIEW ONLY AND NOT INTENDED FORCONSTRUCTION, BIDDING, OR PERMITPURPOSE. THEY ARE PREPARED BY, ORUNDER THE SUPERVISION OF:ENGINEERDATEPRELIMINARY-FOR REVIEW ONLY-XXXXX XXXXXXXX####7/27/21REG. #NOT FORCONSTRUCTIONSEAL 1" = 20'50' X 50' SIGHT TRIANGLE50' X 50' SIGHT TRIANGLE10' X 10' PEDESTRIANTRIANGLES8' PLANTING STRIP8' SIDEWALK16' SETBACK FROM BACK OF CURB1.0' SUE10' BUILD TO LINE8' PLANTING STRIP8' SIDEWALK16' SETBACK1.0' SUE10' BUILD TO LINEDISTRIBUTION STREET(TOD-UC SECONDARY FRONTAGE)35' MINIMUM B-B WITH ON-STREET PARKINGPER NEW BERN AREA PLANDUNAVANT STREET(TOD-UC SECONDARY FRONTAGE)35' MINIMUM B-B WITH ON-STREET PARKINGPER NEW BERN AREA PLAN8' PLANTING STRIP8' SIDEWALK10' BUILD TO LINE24'24' SETBACK FROM FUTURE BACK OF CURBSOUTH TRYON STREET(TOD-UC PRIMARY FRONTAGE)4+ LANE AVE/BLVDEXISTING CURB TO REMAINEXISTING 24" VALLEY CURB TO BE REPLACEDWITH STANDARD 2'-6" CURB AND GUTTER800 LFEXISTING 24" VALLEY CURB TO BE REPLACEDWITH STANDARD 2'-6" CURB AND GUTTER800 LFPROPOSED ON-STREET PARKINGPROPOSED ON-STREET PARKINGDEVELOPMENT SUMMARY:PARCEL ID NUMBER (PID#):12104301, 12104302, 12104303, 12104304, 12104317, 12104319EXISTING PARCEL SIZE: X.XX AC TOTALJURISDICTION:CITY OF CHARLOTTEEXISTING ZONING:TOD-UCEXISTING LAND USE:INDUSTRIAL BUILDINGSPROPOSED PRINCIPAL USE:MULTI-FAMILY APARTMENTSPROPOSED GROSS FLOOR AREA:XXX,XXX SF (XX.X AC)FLOOR AREA RATIO:XX.X AC/ X.XX AC = X.X FARBUILDING SITING :BUILDING SETBACK:24' PRIMARY FRONTAGE (SOUTH TRYON STREET)16' FOR SECONDARY FRONTAGE (DUNAVANT STREET ANDDISTRIBUTION STREET)BUILD-TO ZONE:0-20' FROM SETBACK LINEMIN. SIDE SETBACK LINE:N/AMIN. REAR SETBACK LINE:NONE (UNLESS ABUTTING SINGLE FAM RES.)TOTAL PROPOSED UNITS:XXX UNITS (XXX BEDROOMS)BUILDING HT. MIN. 24':BUILDING HT. MAX. 75' (100' W/ BONUS):MAX BUILDING HT: XX' W/ BONUS**DEVELOPMENT SHALL PURSUE HEIGHT BONUS AS ALLOWED BYCHAPTER 15 OF THE CHARLOTTE ZONING ORDINANCE.BUILD TO PERCENTAGEPRIMARY: 80% REQ.PROVIDED: XX%SECONDARY 40% REQ.PROVIDED: XX%*REFER TO SHEET XX.XX IN ARCH ELEVATIONS THIS SETPARKING CALCULATIONS :MAXIMUM PARKING: 1.1 SPACE/ BEDROOM = XXX MAX. SPACES(EXCLUDING REQ. ADA + ON-STREET PARKING)PROVIDED PARKING: XXX TOTAL SPACES-XXX STANDARD SURFACE PARKING SPACES-XX COMPACT SPACES-XX ACCESSIBLE SPACES- (1) 10' x 25' OFF-STREET LOADING SPACEBIKE PARKING REQUIREMENTS:15 DU OR NOT TO EXCEED 30LONG-TERM SPACES:80%(30)= 24 SPACES LOCATED IN BUILDING BIKE STORAGESHORT-TERM SPACES:16 SPACES LOCATED AT PARKING DECK ENTRY DISTRIBUTION14 ADDITIONAL SPACES LOCATED IN BUILDING BIKE STORAGETOTAL OF 120 LONG-TERM BIKE SPACES PROVIDED IN BIKE CENTEROPEN SPACE REQUIREMENTS:OPEN SPACE (10% IN TOD-NC): X.XX AC REQUIREDMIN. 12' IN DEPTH/WIDTHX.XX AC PROVIDED (+- XX,XXX SF)OPEN SPACE TO INCLUDE BUT NOT LIMITED TO: HARDSCAPE PLAZA AREAS WITH VARIED SEATING, LIGHTINGAND OVERHEAD SHADE STRUCTURES AND LANDSCAPING. OUTDOOR POOL, KITCHEN AND GRILL AREAS ANDFLEXIBLE LAWN SPACE.SOLID WASTE SUMMARY:REFER TO ARCHITECTURE FOR TRASH COMPACTOR/ RECYCLINGTREE SAVE REQUIREMENTS:TREE SAVE REQUIRED: N/A- EXEMPT IN TOD DISTRICTTREE MITIGATION PROVIDED:N/A- EXEMPT IN TOD DISTRICTLOADING:LIGHTING:MAX HEIGHT OF STAND ALONE LIGHT FIXTURE SHALL BE 20'. LIGHTING DESIGNER TO PROVIDE PHOTOMETRICLIGHTING PLAN SHOWING ZERO FOOTCANDLES AT THE RESIDENTIAL PROPERTY LINES.24'FUTURE BACK OF CURB80' TRANSITIONAL R/W10' X 70' SIGHT TRIANGLEOFF TRANSITIONAL R/W13'7'16'16'29'40'50'FUTURE 50' STORMWATER EASEMENTHANOVERSOUTH ENDHANOVER1021009GRADING7/28/2021 7:41 PM MARC MOMSEN N:\_2021\1021009\CAD\DOCUMENTATION\1021009_PLN_LYOT.DWG
R/WR/WR/WR/WR/WSTSTSTSTSTSTSTSTSTSTSTSTSTSTSTSTSTSTSTST
ST
STSTSTSTST720720720
710715720715715
RIM:719.86IN:712.99OUT:712.92GR:715.77IN:706.30(A)IN:710.21(B)OUT:705.97GR:716.42OUT:706.90710710 720
714713712713711712
712 71171
2
709
708
711709711710DISTRIBUTION
STREET
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/W714713712711708FIRECLAYPURISTK-2314LAVATORY FIRECLAYPURISTK-2314LAVATORY
FIRECLAYPURISTK-2314LAVATORY FIRECLAYPURISTK-2314LAVATORY
VITREOUS CHINAWALL HUNG TOILETVEILK-6303
VITREOUS CHINAWALL HUNG TOILETVEILK-6303
VITREOUS CHINAWALL HUNG TOILETVEILK-6303
SYNCHRO 700 TVSYNCHRO 700 TVFIRECLAYPURISTK-2314LAVATORY
VITREOUS CHINAWALL HUNG TOILETVEILK-6303
FIRECLAYPURISTK-2314LAVATORY
VITREOUS CHINAWALL HUNG TOILETVEILK-6303
VITREOUS CHINAWALL HUNG TOILETVEILK-6303 ENTRYCLOSINGROOMLOBBYLEASINGCO-WORK /MAIL ROOMPARCELLOCKERROOMWORK /BREAKROOMSCREENINGROOMLOGGIAFITNESSPANTRYTABLECLUBROOMC O R R I D O RMEN'SRESTROOMWOMEN'SRESTROOMRESTROOMRESTROOMMANAGER'SOFFICEASSISTANTMANAGER'SOFFICEFIREPLACESITTINGAREALEASINGAUXILLARYROOMAV / ITROOMCORRIDORPOURSTRIP 723.44723.02722.79722.43721.79721.63721.38721.12719.52718.21716.22715.20714.43713.36711.43711.38711.86724.08723.42722.95721.94721.53720.20716.65710.72709.44708.85FUTURE BACK OF CURB
722.37721.80716.66724.13712.34710.98710.98710.98713.90713.72723723722722722722711711722722
722722722711710711722711710
710711710711711711711711 711722711 722 722723722722722711 7237227217207197187177167157147137127117
1
0
712713714715716718719720
HANOVERSOUTH ENDHANOVER1021009GRADING7/28/2021 8:08 PM MARC MOMSEN N:\_2021\1021009\CAD\DOCUMENTATION\1021009_PLN_GRAD.DWGKEY MAPSEALSHEET NUMBERSHEET TITLELANDDESIGN PROJ.#SCALEPROJECTNORTHNO.DESCRIPTIONDATEREVISION / ISSUANCEORIGINAL SHEET SIZE: 30" X 42"VERT:HORZ:CHECKED BY:DRAWN BY:DESIGNED BY:223 NORTH GRAHAM STREETCHARLOTTE, NC 28202704.333.0325WWW.LANDDESIGN.COMTHESE DOCUMENTS ARE FOR DESIGNREVIEW ONLY AND NOT INTENDED FORCONSTRUCTION, BIDDING, OR PERMITPURPOSE. THEY ARE PREPARED BY, ORUNDER THE SUPERVISION OF:ENGINEERDATEPRELIMINARY-FOR REVIEW ONLY-XXXXX XXXXXXXX####7/28/21REG. #NOT FORCONSTRUCTIONSEAL 4020010SPOT ELEVATION AT TOP OFEXISTING VALLEY CURB (TYP)8' PLANTING STRIP8' SIDEWALK16' SETBACK FROM BACK OF CURB1.0' SUE10' BUILD TO LINEDUNAVANT STREET(TOD-UC SECONDARY FRONTAGE)35' MINIMUM B-B WITH ON-STREET PARKINGPER NEW BERN AREA PLANEXISTING 24" VALLEY CURB TO BE REPLACEDWITH STANDARD 2'-6" CURB AND GUTTER800 LFDISTRIBUTION STREET(TOD-UC SECONDARY FRONTAGE)35' MINIMUM B-B WITH ON-STREET PARKINGPER NEW BERN AREA PLANSOUTH TRYON STREET(TOD-UC PRIMARY FRONTAGE)4+ LANE AVE/BLVDSPOT ELEVATION AT TOP OFEXISTING VALLEY CURB (TYP)COURTYARD 710.00PARKING DECK LOWER LEVEL711.00FFE: 711.00FFE: 711.00FFE: 711.00FFE: 711.00 (LL)FFE: 722.00FFE: 722.00FFE: 722.00FFE: 723.00FFE: 722.00

Appendix B

Preliminary Cut/Fill Analysis
Job: 1021009-X-AGTEK_LOWERED 071521Units: Ft-CYThu Jul 15, 2021 15:21:54 Page 1 Volume Report Subgrade vs. Stripped Area Volume Comp/Ratio Compact Export Change Total Cut Fill OnGrade Cut Fill Cut Fill Cut Fill -Import Per .1 Ft CLUB 13,523 314 13,196 13 45 1,862 1.00 1.15 45 2,141 -2,096 58 COURTYARD 17,950 17,835 103 12 2,676 1 1.00 1.15 2,676 1 2,675 76 LOWER LEVEL 72,478 58,540 11,860 2,078 7,010 695 1.00 1.15 7,010 799 6,211 309 TRYON 19,509 26 19,481 2 1 3,042 1.00 1.15 1 3,498 -3,497 83 Regions Total 123,460 76,715 44,640 2,105 9,732 5,600 9,732 6,439 3,293 526 Unspecified 53,200 7,839 44,621 740 416 3,038 1.00 1.15 416 3,494 -3,078 227 Job Total 176,660 84,554 89,261 2,845 10,148 8,638 10,148 9,933 215 753 Plane Slope Stripping Qtys Area Area Depth Volume STRIPPING 176,660 177,507 0.670 4,405 Plane Slope Sectional Qtys Area Area Depth Volume CLUB 13,523 13,537 0.500 251 COURTYARD 17,950 18,111 0.500 335 LOWER LEVEL 72,478 72,534 0.670 1,800 TRYON 19,509 19,509 0.500 361 Sectional Total 123,460 123,691 2,747

Appendix C

Proposed Construction Schedule
Activity ID Activity Name Remaining
Duration
Start Finish
Hanover South EndHanover South End 704 22-Jun-21 A 10-May-24
PRE-CONSTRUCTIONPRE-CONSTRUCTION 155 22-Jun-21 A 01-Apr-22
DesignDesign 155 22-Jun-21 A 01-Apr-22
GMP ClosingGMP Closing 61 08-Nov-21 31-Jan-22
PermitsPermits 63 24-Nov-21 18-Feb-22
CONSTRUCTIONCONSTRUCTION 704 27-Aug-21 10-May-24
MILESTONESMILESTONES 634 06-Dec-21 10-May-24
CRITICAL CONSTRUCTION MILESTONESCRITICAL CONSTRUCTION MILESTONES 497 06-Dec-21 02-Nov-23
A1060 Construction NTP#1 0 06-Dec-21
A1360 Start Early Civil/Utility Work 0 06-Dec-21
A1350 Construction NTP#2 0 01-Feb-22 01-Feb-22
A1100 Start Site Grading 0 15-Feb-22
A1140 Start Garage Foundations 0 15-Mar-22
A1150 Start Podium Foundations 0 15-Mar-22
A1340 Start Precast Garage Erection 0 27-May-22
A1160 Top-out Garage Erection 0 19-Aug-22
A1170 Start Framing 0 30-Aug-22
A1300 Podium Concrete Complete 0 07-Sep-22
A1320 Framing Complete - Building "A"0 02-Dec-22
A12910 Framing Complete - Building "B"0 13-Dec-22
A12920 Framing Complete - Building "C"0 16-Dec-22
A1180 Top-out Framing 0 27-Dec-22
A12930 Framing Complete - Building "D"0 27-Dec-22
A1230 Start Production Drywall 0 16-Jan-23
A1240 Complete Production Drywall 0 02-Nov-23
PROJECT COMPLETION MILESTONESPROJECT COMPLETION MILESTONES 213 18-Jul-23 10-May-24
A1070 Target 1st Turns/Occupancy (Building "A")0 18-Jul-23*
A1280 TCO Building "A"0 18-Jul-23
A1330 Turnover Clubhouse 0 25-Jul-23
A12630 Turnover Pool Courtyard 0 01-Aug-23
A1080 Building "A" Units Turned to Management 0 08-Aug-23
A1290 TCO Building "B"0 31-Aug-23
A1090 Building "B" Units Turned to Management 0 14-Sep-23
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2
2021 2022 2023 2024
10-May-24, Hanover South End
01-Apr-22, PRE-CONSTRUCTION
01-Apr-22, DesignDesign Kick-off
31-Jan-22, GMP Closing
18-Feb-22, Permits
10-May-24, CONSTRUCTION
10-May-24, MILESTONES
02-Nov-23, CRITICAL CONSTRUCTION MILESTONES
Construction NTP#1
Start Early Civil/Utility Work
Construction NTP#2
Start Site Grading
Start Garage Foundations
Start Podium Foundations
Start Precast Garage Erection
Top-out Garage Erection
Start Framing
Podium Concrete Complete
Framing Complete - Building "A"
Framing Complete - Building "B"
Framing Complete - Building "C"
Top-out Framing
Framing Complete - Building "D"
Start Production Drywall
Complete Production Drywall
10-May-24, PROJECT COMPLETION MILESTONES
Target 1st Turns/Occupancy (Building "A")
TCO Building "A"
Turnover Clubhouse
Turnover Pool Courtyard
Building "A" Units Turned to Management
TCO Building "B"
Building "B" Units Turned to Management
Hanover South End (Brownfield Submission Schedule)
Actual Work
Remaining Work
Critical Remaining Work
Milestone
Summary Page 1 of 3 Data Date 27-Aug-21
© Oracle Corporation
Activity ID Activity Name Remaining
Duration
Start Finish
A12610 TCO Building "C"0 17-Oct-23
A1110 Building "C" Units Turned to Management 0 02-Nov-23
A1120 Building "D" Units Turned to Management 0 12-Jan-24
A12620 TCO Building "D"0 12-Jan-24
A12640 TCO Building "E"0 19-Feb-24*
A12650 Building "E" Units Turned to Mgmt 0 04-Mar-24*
A1270 Substantial Completion 0 15-Mar-24
A1130 Project Close-out Complete 0 10-May-24
PROJECT COMPLETION MILESTONES - With WeatherPROJECT COMPLETION MILESTONES - With Weather 213 18-Jul-23 10-May-24
WEATHER DAYSWEATHER DAYS 50 27-Aug-21 05-Nov-21
SITEWORKSITEWORK 30 01-Feb-22 14-Mar-22
Excavation & GradingExcavation & Grading 30 01-Feb-22 14-Mar-22
PRECAST GARAGEPRECAST GARAGE 499 27-Aug-21 28-Jul-23
Foundations - PRECAST GARAGEFoundations - PRECAST GARAGE 53 15-Mar-22 26-May-22
Erect - PRECAST GARAGEErect - PRECAST GARAGE 60 27-May-22 19-Aug-22
Detail - PRECAST GARAGEDetail - PRECAST GARAGE 10 22-Aug-22 02-Sep-22
Topping Slabs - PRECAST GARAGETopping Slabs - PRECAST GARAGE 39 05-Sep-22 27-Oct-22
MEPF ROUGH IN - PRECAST GARAGEMEPF ROUGH IN - PRECAST GARAGE 60 27-Aug-21 19-Nov-21
Garage Finishes - PRECAST GARAGEGarage Finishes - PRECAST GARAGE 43 31-May-23 28-Jul-23
ELEVATORSELEVATORS 413 27-Aug-21 30-Mar-23
Elevator 1Elevator 1 339 27-Aug-21 16-Dec-22
Elevator 2Elevator 2 383 27-Aug-21 16-Feb-23
Elevator 3Elevator 3 413 27-Aug-21 30-Mar-23
APARTMENTSAPARTMENTS 486 15-Mar-22 24-Jan-24
CONCRETECONCRETE 159 15-Mar-22 24-Oct-22
BUILDING A CONCRETEBUILDING A CONCRETE 139 15-Mar-22 26-Sep-22
BUILDING B CONCRETEBUILDING B CONCRETE 132 22-Mar-22 22-Sep-22
BUILDING C CONCRETEBUILDING C CONCRETE 133 29-Mar-22 30-Sep-22
BUILDING D CONCRETEBUILDING D CONCRETE 144 05-Apr-22 24-Oct-22
Building E ConcreteBuilding E Concrete 138 12-Apr-22 21-Oct-22
Level #1 (Bldg. E)Level #1 (Bldg. E)138 12-Apr-22 21-Oct-22
Foundations (Bldg. E. - Level 1)Foundations (Bldg. E. - Level 1)86 12-Apr-22 10-Aug-22
Podium (Bldg. E.- Level 1)Podium (Bldg. E.- Level 1)34 11-Aug-22 27-Sep-22
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2
2021 2022 2023 2024
TCO Building "C"
Building "C" Units Turned to Management
Building "D" Units Turned to Management
TCO Building "D"
TCO Building "E"
Building "E" Units Turned to Mgmt
Substantial Completion
Project Close-out Complete
10-May-24, PROJECT COMPLETION MILESTONES - With WeatherTarget 1st Turns/Occupancy (w/weather)TCO Building "A" (w/weather)Turnover Clubhouse (w/weather)Turnover Pool Courtyard (w/weather)Building "A" Units Turned to Management (w/weather)TCO Building "B" (w/weather)Building "B" Units Turned to Management (w/weather)TCO Building "C" (w/weather)Building "C" Units Turned to Management (w/weather)Building "D" Units Turned to Management (w/weather)TCO Building "D" (w/weather)Substantial Completion (w/weather)Project Close-out Complete (w/weather)
05-Nov-21, WEATHER DAYS
14-Mar-22, SITEWORK
14-Mar-22, Excavation & Grading
28-Jul-23, PRECAST GARAGE
26-May-22, Foundations - PRECAST GARAGE
19-Aug-22, Erect - PRECAST GARAGE
02-Sep-22, Detail - PRECAST GARAGE
27-Oct-22, Topping Slabs - PRECAST GARAGE
19-Nov-21, MEPF ROUGH IN - PRECAST GARAGE
28-Jul-23, Garage Finishes - PRECAST GARAGE
30-Mar-23, ELEVATORS
16-Dec-22, Elevator 1
16-Feb-23, Elevator 2
30-Mar-23, Elevator 3
24-Jan-24, APARTMENTS
24-Oct-22, CONCRETE
26-Sep-22, BUILDING A CONCRETE
22-Sep-22, BUILDING B CONCRETE
30-Sep-22, BUILDING C CONCRETE
24-Oct-22, BUILDING D CONCRETE
21-Oct-22, Building E Concrete
21-Oct-22, Level #1 (Bldg. E)
10-Aug-22, Foundations (Bldg. E. - Level 1)
27-Sep-22, Podium (Bldg. E.- Level 1)
Hanover South End (Brownfield Submission Schedule)
Actual Work
Remaining Work
Critical Remaining Work
Milestone
Summary Page 2 of 3 Data Date 27-Aug-21
© Oracle Corporation
Activity ID Activity Name Remaining
Duration
Start Finish
SOG (Bldg. E - Level 1)SOG (Bldg. E - Level 1)18 28-Sep-22 21-Oct-22
FRAMING/BUILD-OUTFRAMING/BUILD-OUT 372 23-Aug-22 24-Jan-24
CLUBHOUSECLUBHOUSE 216 27-Sep-22 25-Jul-23
BUILDING A BUILD-OUTBUILDING A BUILD-OUT 243 23-Aug-22 27-Jul-23
BUILDING B BUILD-OUTBUILDING B BUILD-OUT 288 30-Aug-22 05-Oct-23
BUILDING C BUILD-OUTBUILDING C BUILD-OUT 319 06-Sep-22 24-Nov-23
BUILDING D BUILD-OUTBUILDING D BUILD-OUT 357 13-Sep-22 24-Jan-24
BUILDING E BUILD-OUTBUILDING E BUILD-OUT 243 20-Sep-22 24-Aug-23
LANDSCAPE/HARDSCAPELANDSCAPE/HARDSCAPE 98 20-Feb-23 05-Jul-23
BUILDING PERIMETERBUILDING PERIMETER 90 02-Mar-23 05-Jul-23
COURTYARD-1COURTYARD-1 60 20-Feb-23 12-May-23
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2
2021 2022 2023 2024
21-Oct-22, SOG (Bldg. E - Level 1)
24-Jan-24, FRAMING/BUILD-OUT
25-Jul-23, CLUBHOUSEMEPF INSPECTIONS (BAL1)3RD PARTY INSPECTIONS (BAL1)
27-Jul-23, BUILDING A BUILD-OUTDry-in (Bldg. A)MEPF INSPECTIONS (BAL6)3RD PARTY INSPECTIONS (BAL6)MEPF INSPECTIONS (BAL5)3RD PARTY INSPECTIONS (BAL5)MEPF INSPECTIONS (BAL4)3RD PARTY INSPECTIONS (BAL4)MEPF INSPECTIONS (BAL3)3RD PARTY INSPECTIONS (BAL3)MEPF INSPECTIONS (BAL2)3RD PARTY INSPECTIONS (BAL2)LaJolla, NGBS & City Inspections (BAL6)MEPF FINAL INSPECTIONS (BAL6)TCO (BAL6)LaJolla, NGBS & City Inspections (BAL5)MEPF FINAL INSPECTIONS (BAL5)TCO (BAL5)LaJolla, NGBS & City Inspections (BAL4)MEPF FINAL INSPECTIONS (BAL4)TCO (BAL4)LaJolla, NGBS & City Inspections (BAL3)MEPF FINAL INSPECTIONS (BAL3)TCO (BAL3)LaJolla, NGBS & City Inspections (BAL2)MEPF FINAL INSPECTIONS (BAL2)TCO (BAL2)
05-Oct-23, BUILDING B BUILD-OUTDry-in (Bldg. B)MEPF INSPECTIONS (BBL7)3RD PARTY INSPECTIONS (BBL7)MEPF INSPECTIONS (BBL6)3RD PARTY INSPECTIONS (BBL6)MEPF INSPECTIONS (BBL5)3RD PARTY INSPECTIONS (BBL5)MEPF INSPECTIONS (BBL4)3RD PARTY INSPECTIONS (BBL4)MEPF INSPECTIONS (BBL3)3RD PARTY INSPECTIONS (BBL3)TCO (BBL7)TCO (BBL6)TCO (BBL5)TCO (BBL4)TCO (BBL3)
24-Nov-23, BUILDING C BUILD-OUTDry-in (Bldg. C)MEPF INSPECTIONS (BCL7)3RD PARTY INSPECTIONS (BCL7)MEPF INSPECTIONS (BCL6)3RD PARTY INSPECTIONS (BCL6)MEPF INSPECTIONS (BCL5)3RD PARTY INSPECTIONS (BCL5)MEPF INSPECTIONS (BCL4)3RD PARTY INSPECTIONS (BCL4)MEPF INSPECTIONS (BCL3)3RD PARTY INSPECTIONS (BCL3)TCO (BCL7)TCO (BCL6)TCO (BCL5)TCO (BCL4)TCO (BCL3)
24-Jan-24, BUILDING D BUILD-OUTDry-in (Bldg. D)MEPF INSPECTIONS (BDL7)3RD PARTY INSPECTIONS (BDL7)MEPF INSPECTIONS (BDL6)3RD PARTY INSPECTIONS (BDL6)MEPF INSPECTIONS (BDL5)3RD PARTY INSPECTIONS (BDL5)MEPF INSPECTIONS (BDL4)3RD PARTY INSPECTIONS (BDL4)MEPF INSPECTIONS (BDL3)3RD PARTY INSPECTIONS (BDL3)TCO (BDL7)TCO (BDL6)TCO (BDL5)TCO (BDL4)TCO (BDL3)
24-Aug-23, BUILDING E BUILD-OUTDry-in (Bldg. E)MEPF INSPECTIONS (BEL6)3RD PERTY INSPECTIONS (BEL6)MEPF INSPECTIONS (BEL5)3RD PERTY INSPECTIONS (BEL5)MEPF INSPECTIONS (BEL4)3RD PERTY INSPECTIONS (BEL4)MEPF INSPECTIONS (BEL3)3RD PERTY INSPECTIONS (BEL3)MEPF INSPECTIONS (BEL2)3RD PERTY INSPECTIONS (BEL2)LaJolla, NGBS & City Inspections (BEL6)MEPF FINEL INSPECTIONS (BEL6)TCO (BEL6)LaJolla, NGBS & City Inspections (BEL5)MEPF FINEL INSPECTIONS (BEL5)TCO (BEL5)LaJolla, NGBS & City Inspections (BEL4)MEPF FINEL INSPECTIONS (BEL4)TCO (BEL4)LaJolla, NGBS & City Inspections (BEL3)MEPF FINEL INSPECTIONS (BEL3)TCO (BEL3)LaJolla, NGBS & City Inspections (BEL2)MEPF FINEL INSPECTIONS (BEL2)TCO (BEL2)
05-Jul-23, LANDSCAPE/HARDSCAPE
05-Jul-23, BUILDING PERIMETER
12-May-23, COURTYARD-1
Hanover South End (Brownfield Submission Schedule)
Actual Work
Remaining Work
Critical Remaining Work
Milestone
Summary Page 3 of 3 Data Date 27-Aug-21
© Oracle Corporation

Appendix D

Risk Calculations
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
Worst Case Groundwater
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: Worst Case Groundwater
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: Worst Case Groundwater
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
1
70
80
330
1
250
8
3527
0.3
50
100
19652
2.5
0.71
1
20
350
24
6032
0.07
0.54
1
70
80
2373
0.2
200
6365
0.78
Input Form 1B
Exposure Unit ID: Worst Case Groundwater
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: Worst Case Groundwater
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Unit ID: Worst Case Groundwater
Description of Exposure Point Concentration Selection:
NOTE: If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
Exposure Point Concentration (ug/L)Notes:CAS Number Chemical Minimum Concentration (Qualifier)
Maximum Concentration (Qualifier)Units Location of Maximum Concentration
Detection Frequency
Range of Detection Limits
Concentration Used for Screening
Background Value
Screening Toxicity Value (Screening Level) (n/c)
Potential ARAR/TBC Value
Potential ARAR/TBC Source
COPC Flag (Y/N)
Rationale for Selection or Deletion
4.1 67-64-1 Acetone ug/L4.8 7440-38-2 Arsenic, Inorganic ug/L1607440-39-3 Barium ug/L7.2 16065-83-1 Chromium(III), Insoluble Salts ug/L2.3 75-34-3 Dichloroethane, 1,1-ug/L0.25 107-06-2 Dichloroethane, 1,2-ug/L3.6 75-35-4 Dichloroethylene, 1,1-ug/L0.98 156-59-2 Dichloroethylene, cis-1,2-ug/L25123-91-1 Dioxane, 1,4-ug/L2.1 75-00-3 Ethyl Chloride (Chloroethane)ug/L6.9 7439-92-1 ~Lead and Compounds ug/L0.038 7439-97-6 ~Mercury (elemental)ug/L0.3 1634-04-4 Methyl tert-Butyl Ether (MTBE)ug/L1.1 7782-49-2 Selenium ug/L0.28 127-18-4 Tetrachloroethylene ug/L0.24 108-88-3 Toluene ug/L2.3 79-01-6 Trichloroethylene ug/L3275-01-4 Vinyl Chloride ug/L
Input Form 2B
Groundwater Exposure Point Concentration Table
Exposure point concentrations reflect maximum detection in site groundwater during Jnauary 6, 2021 groundwater sampling event.
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: Worst Case Groundwater
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air 2.2E-04 8.6E-01 YES
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Groundwater to Indoor Air 1.3E-05 2.0E-01 NO
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: Worst Case Groundwater
CAS #Chemical Name:Groundwater Concentration(ug/L)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard Quotient67-64-1 Acetone 4.1 -6.5E+03 1.8E-077440-38-2 Arsenic, Inorganic 4.8 6.5E-04 3.1E-037440-39-3 Barium 160 -1.0E-0116065-83-1 Chromium(III), Insoluble Salts 7.2 --
75-34-3 Dichloroethane, 1,1-2.3 1.8E+00 -3.0E-07107-06-2 Dichloroethane, 1,2-0.25 1.1E-01 1.5E+00 1.1E-07 1.7E-0375-35-4 Dichloroethylene, 1,1-3.6 -4.2E+01 1.8E-02
156-59-2 Dichloroethylene, cis-1,2-0.98 --123-91-1 Dioxane, 1,4-25 5.6E-01 6.3E+00 8.7E-09 1.6E-0475-00-3 Ethyl Chloride (Chloroethane)2.1 -2.1E+03 9.1E-057439-92-1 ~Lead and Compounds 6.9 --7439-97-6 ~Mercury (elemental)0.038 -6.3E-02 4.3E-021634-04-4 Methyl tert-Butyl Ether (MTBE)0.3 1.1E+01 6.3E+02 6.7E-10 2.3E-067782-49-2 Selenium 1.1 -4.2E+00127-18-4 Tetrachloroethylene 0.28 1.1E+01 8.3E+00 1.9E-08 4.9E-03108-88-3 Toluene 0.24 -1.0E+03 1.2E-0579-01-6 Trichloroethylene 2.3 4.8E-01 4.2E-01 1.9E-06 4.4E-0175-01-4 Vinyl Chloride 32 1.7E-01 2.1E+01 2.2E-04 3.5E-01
Cumulative:2.2E-04 8.6E-01
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3A
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: Worst Case Groundwater
CAS #Chemical Name:Groundwater Concentration(ug/L)
Calculated Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @ TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @ THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard
Quotient
67-64-1 Acetone 4.1 0.005866721 -2.7E+04 4.3E-08
7440-38-2 Arsenic, Inorganic 4.8 2.9E-03 1.3E-02
7440-39-3 Barium 160 -4.4E-01
16065-83-1 Chromium(III), Insoluble Salts 7.2 --
75-34-3 Dichloroethane, 1,1-2.3 0.52845462 7.7E+00 -6.9E-08
107-06-2 Dichloroethane, 1,2-0.25 0.012060507 4.7E-01 6.1E+00 2.6E-08 3.9E-04
75-35-4 Dichloroethylene, 1,1-3.6 3.841373671 -1.8E+02 4.4E-03
156-59-2 Dichloroethylene, cis-1,2-0.98 0.163466885 --
123-91-1 Dioxane, 1,4-25 0.004905969 2.5E+00 2.6E+01 2.0E-09 3.7E-05
75-00-3 Ethyl Chloride (Chloroethane)2.1 0.952984464 -8.8E+03 2.2E-05
7439-92-1 ~Lead and Compounds 6.9 --
7439-97-6 ~Mercury (elemental)0.038 0.013376 -2.6E-01 1.0E-02
1634-04-4 Methyl tert-Butyl Ether (MTBE)0.3 0.007199509 4.7E+01 2.6E+03 1.5E-10 5.5E-07
7782-49-2 Selenium 1.1 -1.8E+01
127-18-4 Tetrachloroethylene 0.28 0.202616517 4.7E+01 3.5E+01 4.3E-09 1.2E-03
108-88-3 Toluene 0.24 0.065151267 -4.4E+03 3.0E-06
79-01-6 Trichloroethylene 2.3 0.926206051 3.0E+00 1.8E+00 3.1E-07 1.1E-01
75-01-4 Vinyl Chloride 32 36.36958299 2.8E+00 8.8E+01 1.3E-05 8.3E-02
Cumulative:1.3E-05 2.0E-01
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3D
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk,
no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
SG-1 / DUP-3
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SG-1 / DUP-3
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SG-1 / DUP-3
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
Input Form 1B
Exposure Unit ID: SG-1 / DUP-3
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
2373
0.2
200
6365
0.78
0.54
1
70
80
20
350
24
6032
0.07
100
19652
2.5
0.71
1
1
70
80
330
1
250
8
3527
0.3
50
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: SG-1 / DUP-3
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Unit ID: SG-1 / DUP-3
Description of Exposure Point Concentration Selection:
Exposure Point Concentration
(ug/m3)Notes:CAS Number Chemical Minimum Concentration (Qualifier)
Maximum Concentration (Qualifier)
Units Location of Maximum Concentration
Detection Frequency
Range of Detection Limits
Concentration Used for Screening
Background Value
Screening Toxicity Value (Screening Level) (n/c)
Potential ARAR/TBC Value
Potential ARAR/TBC Source
COPC Flag (Y/N)
Rationale for Selection or Deletion
9.2 67-64-1 Acetone ug/m3
52 71-43-2 Benzene ug/m3
880 75-15-0 Carbon Disulfide ug/m3
0 67-66-3 Chloroform ug/m3
22 110-82-7 Cyclohexane ug/m3
2.9 75-71-8 Dichlorodifluoromethane ug/m3
2.4 75-34-3 Dichloroethane, 1,1-ug/m3
81 75-35-4 Dichloroethylene, 1,1-ug/m3
42 156-59-2 Dichloroethylene, cis-1,2-ug/m3
81 156-60-5 Dichloroethylene, trans-1,2-ug/m3
7.8 75-00-3 Ethyl Chloride (Chloroethane)ug/m3
5.1 100-41-4 Ethylbenzene ug/m3
27 142-82-5 Heptane, N-ug/m3
37 110-54-3 Hexane, N-ug/m3
4 67-63-0 Isopropanol ug/m3
3.1 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
0 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3
4.3 75-09-2 Methylene Chloride ug/m3
0 100-42-5 Styrene ug/m3
14 127-18-4 Tetrachloroethylene ug/m3
90 108-88-3 Toluene ug/m3
0 71-55-6 Trichloroethane, 1,1,1-ug/m3
1400 79-01-6 Trichloroethylene ug/m3
0 75-69-4 Trichlorofluoromethane ug/m3
11 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
4.4 75-01-4 Vinyl Chloride ug/m3
15 108-38-3 Xylene, m-ug/m3
4.6 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Exposure Point Concentrations based on highest detection between sample SG-1 and its duplicate sample DUP-3.
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SG-1 / DUP-3
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 9.3E-05 2.0E+01 YES
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 5.0E-06 1.6E+00 YES
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SG-1 / DUP-3
CAS #Chemical Name:
Soil Gas Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 9.2 0.276 -6.5E+03 8.5E-06
71-43-2 Benzene 52 1.56 3.6E-01 6.3E+00 4.3E-06 5.0E-02
75-15-0 Carbon Disulfide 880 26.4 -1.5E+02 3.6E-02
67-66-3 Chloroform 0 0 1.2E-01 2.0E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 22 0.66 -1.3E+03 1.1E-04
75-71-8 Dichlorodifluoromethane 2.9 0.087 -2.1E+01 8.3E-04
75-34-3 Dichloroethane, 1,1-2.4 0.072 1.8E+00 -4.1E-08
75-35-4 Dichloroethylene, 1,1-81 2.43 -4.2E+01 1.2E-02
156-59-2 Dichloroethylene, cis-1,2-42 1.26 --
156-60-5 Dichloroethylene, trans-1,2-81 2.43 -8.3E+00 5.8E-02
75-00-3 Ethyl Chloride (Chloroethane)7.8 0.234 -2.1E+03 2.2E-05
100-41-4 Ethylbenzene 5.1 0.153 1.1E+00 2.1E+02 1.4E-07 1.5E-04
142-82-5 Heptane, N-27 0.81 -8.3E+01 1.9E-03
110-54-3 Hexane, N-37 1.11 -1.5E+02 1.5E-03
67-63-0 Isopropanol 4 0.12 -4.2E+01 5.8E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)3.1 0.093 -1.0E+03 1.8E-05
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -6.3E+02 0.0E+00
75-09-2 Methylene Chloride 4.3 0.129 1.0E+02 1.3E+02 1.3E-09 2.1E-04
100-42-5 Styrene 0 0 -2.1E+02 0.0E+00
127-18-4 Tetrachloroethylene 14 0.42 1.1E+01 8.3E+00 3.9E-08 1.0E-02
108-88-3 Toluene 90 2.7 -1.0E+03 5.2E-04
71-55-6 Trichloroethane, 1,1,1-0 0 -1.0E+03 0.0E+00
79-01-6 Trichloroethylene 1400 42 4.8E-01 4.2E-01 8.8E-05 2.0E+0175-69-4 Trichlorofluoromethane 0 0 --
95-63-6 Trimethylbenzene, 1,2,4-11 0.33 -1.3E+01 5.3E-03
75-01-4 Vinyl Chloride 4.4 0.132 1.7E-01 2.1E+01 7.9E-07 1.3E-03
108-38-3 Xylene, m-15 0.45 -2.1E+01 4.3E-03
95-47-6 Xylene, o-4.6 0.138 -2.1E+01 1.3E-03
Cumulative:9.3E-05 2.0E+01
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SG-1 / DUP-3
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard
Quotient
67-64-1 Acetone 9.2 0.092 -2.7E+04 6.8E-07
71-43-2 Benzene 52 0.52 1.6E+00 2.6E+01 3.3E-07 4.0E-03
75-15-0 Carbon Disulfide 880 8.8 -6.1E+02 2.9E-03
67-66-3 Chloroform 0 0 5.3E-01 8.6E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 22 0.22 -5.3E+03 8.4E-06
75-71-8 Dichlorodifluoromethane 2.9 0.029 -8.8E+01 6.6E-0575-34-3 Dichloroethane, 1,1-2.4 0.024 7.7E+00 -3.1E-0975-35-4 Dichloroethylene, 1,1-81 0.81 -1.8E+02 9.2E-04156-59-2 Dichloroethylene, cis-1,2-42 0.42 --156-60-5 Dichloroethylene, trans-1,2-81 0.81 -3.5E+01 4.6E-03
75-00-3 Ethyl Chloride (Chloroethane)7.8 0.078 -8.8E+03 1.8E-06
100-41-4 Ethylbenzene 5.1 0.051 4.9E+00 8.8E+02 1.0E-08 1.2E-05
142-82-5 Heptane, N-27 0.27 -3.5E+02 1.5E-04
110-54-3 Hexane, N-37 0.37 -6.1E+02 1.2E-04
67-63-0 Isopropanol 4 0.04 -1.8E+02 4.6E-0578-93-3 Methyl Ethyl Ketone (2-Butanone)3.1 0.031 -4.4E+03 1.4E-06108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -2.6E+03 0.0E+0075-09-2 Methylene Chloride 4.3 0.043 1.2E+03 5.3E+02 3.5E-11 1.6E-05
100-42-5 Styrene 0 0 -8.8E+02 0.0E+00
127-18-4 Tetrachloroethylene 14 0.14 4.7E+01 3.5E+01 3.0E-09 8.0E-04
108-88-3 Toluene 90 0.9 -4.4E+03 4.1E-05
71-55-6 Trichloroethane, 1,1,1-0 0 -4.4E+03 0.0E+00
79-01-6 Trichloroethylene 1400 14 3.0E+00 1.8E+00 4.7E-06 1.6E+0075-69-4 Trichlorofluoromethane 0 0 --95-63-6 Trimethylbenzene, 1,2,4-11 0.11 -5.3E+01 4.2E-0475-01-4 Vinyl Chloride 4.4 0.044 2.8E+00 8.8E+01 1.6E-08 1.0E-04
108-38-3 Xylene, m-15 0.15 -8.8E+01 3.4E-04
95-47-6 Xylene, o-4.6 0.046 -8.8E+01 1.1E-04
Cumulative:5.0E-06 1.6E+00
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
SS-1
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-1
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-1
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
1
70
80
330
1
250
8
3527
0.3
50
100
19652
2.5
0.71
1
20
350
24
6032
0.07
0.54
1
70
80
2373
0.2
200
6365
0.78
Input Form 1B
Exposure Unit ID: SS-1
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: SS-1
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Unit ID: SS-1
Description of Exposure Point Concentration Selection:
Exposure Point Concentration
(ug/m3)Notes:CAS Number Chemical Minimum Concentration (Qualifier)
Maximum Concentration (Qualifier)
Units Location of Maximum Concentration
Detection Frequency
Range of Detection Limits
Concentration Used for Screening
Background Value
Screening Toxicity Value (Screening Level) (n/c)
Potential ARAR/TBC Value
Potential ARAR/TBC Source
COPC Flag (Y/N)
Rationale for Selection or Deletion
29 67-64-1 Acetone ug/m3
0 71-43-2 Benzene ug/m3
1.8 75-15-0 Carbon Disulfide ug/m3
1.5 67-66-3 Chloroform ug/m3
0 110-82-7 Cyclohexane ug/m3
3.1 75-71-8 Dichlorodifluoromethane ug/m3
0 75-34-3 Dichloroethane, 1,1-ug/m3
0 75-35-4 Dichloroethylene, 1,1-ug/m3
0 156-59-2 Dichloroethylene, cis-1,2-ug/m3
0 156-60-5 Dichloroethylene, trans-1,2-ug/m3
0 75-00-3 Ethyl Chloride (Chloroethane)ug/m3
0 100-41-4 Ethylbenzene ug/m3
0 142-82-5 Heptane, N-ug/m3
0 110-54-3 Hexane, N-ug/m3
3.5 67-63-0 Isopropanol ug/m3
1.5 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
0 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3
1.9 75-09-2 Methylene Chloride ug/m3
5.1 100-42-5 Styrene ug/m3
0 127-18-4 Tetrachloroethylene ug/m3
0 108-88-3 Toluene ug/m3
0 71-55-6 Trichloroethane, 1,1,1-ug/m3
0 79-01-6 Trichloroethylene ug/m3
0 75-69-4 Trichlorofluoromethane ug/m3
0 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
0 75-01-4 Vinyl Chloride ug/m3
0 108-38-3 Xylene, m-ug/m3
0 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Exposure Point Concentrations based on detections in sample SS-1.
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-1
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 3.7E-07 2.2E-03 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 2.8E-08 1.7E-04 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-1
CAS #Chemical Name:
Soil Gas Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 29 0.87 -6.5E+03 2.7E-05
71-43-2 Benzene 0 0 3.6E-01 6.3E+00 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 1.8 0.054 -1.5E+02 7.4E-05
67-66-3 Chloroform 1.5 0.045 1.2E-01 2.0E+01 3.7E-07 4.4E-04
110-82-7 Cyclohexane 0 0 -1.3E+03 0.0E+00
75-71-8 Dichlorodifluoromethane 3.1 0.093 -2.1E+01 8.9E-04
75-34-3 Dichloroethane, 1,1-0 0 1.8E+00 -0.0E+00
75-35-4 Dichloroethylene, 1,1-0 0 -4.2E+01 0.0E+00
156-59-2 Dichloroethylene, cis-1,2-0 0 --
156-60-5 Dichloroethylene, trans-1,2-0 0 -8.3E+00 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -2.1E+03 0.0E+00
100-41-4 Ethylbenzene 0 0 1.1E+00 2.1E+02 0.0E+00 0.0E+00
142-82-5 Heptane, N-0 0 -8.3E+01 0.0E+00
110-54-3 Hexane, N-0 0 -1.5E+02 0.0E+00
67-63-0 Isopropanol 3.5 0.105 -4.2E+01 5.0E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)1.5 0.045 -1.0E+03 8.6E-06
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -6.3E+02 0.0E+00
75-09-2 Methylene Chloride 1.9 0.057 1.0E+02 1.3E+02 5.6E-10 9.1E-05
100-42-5 Styrene 5.1 0.153 -2.1E+02 1.5E-04
127-18-4 Tetrachloroethylene 0 0 1.1E+01 8.3E+00 0.0E+00 0.0E+00
108-88-3 Toluene 0 0 -1.0E+03 0.0E+00
71-55-6 Trichloroethane, 1,1,1-0 0 -1.0E+03 0.0E+00
79-01-6 Trichloroethylene 0 0 4.8E-01 4.2E-01 0.0E+00 0.0E+00
75-69-4 Trichlorofluoromethane 0 0 --
95-63-6 Trimethylbenzene, 1,2,4-0 0 -1.3E+01 0.0E+00
75-01-4 Vinyl Chloride 0 0 1.7E-01 2.1E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-0 0 -2.1E+01 0.0E+00
95-47-6 Xylene, o-0 0 -2.1E+01 0.0E+00
Cumulative:3.7E-07 2.2E-03
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-1
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard
Quotient
67-64-1 Acetone 29 0.29 -2.7E+04 2.1E-06
71-43-2 Benzene 0 0 1.6E+00 2.6E+01 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 1.8 0.018 -6.1E+02 5.9E-06
67-66-3 Chloroform 1.5 0.015 5.3E-01 8.6E+01 2.8E-08 3.5E-05
110-82-7 Cyclohexane 0 0 -5.3E+03 0.0E+00
75-71-8 Dichlorodifluoromethane 3.1 0.031 -8.8E+01 7.1E-0575-34-3 Dichloroethane, 1,1-0 0 7.7E+00 -0.0E+0075-35-4 Dichloroethylene, 1,1-0 0 -1.8E+02 0.0E+00156-59-2 Dichloroethylene, cis-1,2-0 0 --156-60-5 Dichloroethylene, trans-1,2-0 0 -3.5E+01 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -8.8E+03 0.0E+00
100-41-4 Ethylbenzene 0 0 4.9E+00 8.8E+02 0.0E+00 0.0E+00
142-82-5 Heptane, N-0 0 -3.5E+02 0.0E+00
110-54-3 Hexane, N-0 0 -6.1E+02 0.0E+00
67-63-0 Isopropanol 3.5 0.035 -1.8E+02 4.0E-0578-93-3 Methyl Ethyl Ketone (2-Butanone)1.5 0.015 -4.4E+03 6.8E-07108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -2.6E+03 0.0E+0075-09-2 Methylene Chloride 1.9 0.019 1.2E+03 5.3E+02 1.5E-11 7.2E-06
100-42-5 Styrene 5.1 0.051 -8.8E+02 1.2E-05
127-18-4 Tetrachloroethylene 0 0 4.7E+01 3.5E+01 0.0E+00 0.0E+00
108-88-3 Toluene 0 0 -4.4E+03 0.0E+00
71-55-6 Trichloroethane, 1,1,1-0 0 -4.4E+03 0.0E+00
79-01-6 Trichloroethylene 0 0 3.0E+00 1.8E+00 0.0E+00 0.0E+0075-69-4 Trichlorofluoromethane 0 0 --95-63-6 Trimethylbenzene, 1,2,4-0 0 -5.3E+01 0.0E+0075-01-4 Vinyl Chloride 0 0 2.8E+00 8.8E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-0 0 -8.8E+01 0.0E+00
95-47-6 Xylene, o-0 0 -8.8E+01 0.0E+00
Cumulative:2.8E-08 1.7E-04
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
SS-2
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-2
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-2
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
Input Form 1B
Exposure Unit ID: SS-2
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
2373
0.2
200
6365
0.78
0.54
1
70
80
20
350
24
6032
0.07
100
19652
2.5
0.71
1
1
70
80
330
1
250
8
3527
0.3
50
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: SS-2
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Unit ID: SS-2
Description of Exposure Point Concentration Selection:
Exposure Point Concentration
(ug/m3)Notes:CAS Number Chemical Minimum Concentration (Qualifier)
Maximum Concentration (Qualifier)
Units Location of Maximum Concentration
Detection Frequency
Range of Detection Limits
Concentration Used for Screening
Background Value
Screening Toxicity Value (Screening Level) (n/c)
Potential ARAR/TBC Value
Potential ARAR/TBC Source
COPC Flag (Y/N)
Rationale for Selection or Deletion
24 67-64-1 Acetone ug/m3
0 71-43-2 Benzene ug/m3
3.1 75-15-0 Carbon Disulfide ug/m3
1.6 67-66-3 Chloroform ug/m3
0 110-82-7 Cyclohexane ug/m3
3.3 75-71-8 Dichlorodifluoromethane ug/m3
0 75-34-3 Dichloroethane, 1,1-ug/m3
0 75-35-4 Dichloroethylene, 1,1-ug/m3
0 156-59-2 Dichloroethylene, cis-1,2-ug/m3
0 156-60-5 Dichloroethylene, trans-1,2-ug/m3
0 75-00-3 Ethyl Chloride (Chloroethane)ug/m3
0 100-41-4 Ethylbenzene ug/m3
0 142-82-5 Heptane, N-ug/m3
0 110-54-3 Hexane, N-ug/m3
4.2 67-63-0 Isopropanol ug/m3
1.7 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
0 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3
2.1 75-09-2 Methylene Chloride ug/m3
0 100-42-5 Styrene ug/m3
0 127-18-4 Tetrachloroethylene ug/m3
0 108-88-3 Toluene ug/m3
0 71-55-6 Trichloroethane, 1,1,1-ug/m3
0 79-01-6 Trichloroethylene ug/m3
0 75-69-4 Trichlorofluoromethane ug/m3
0 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
0 75-01-4 Vinyl Chloride ug/m3
0 108-38-3 Xylene, m-ug/m3
0 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Exposure Point Concentrations based on detections in sample SS-2.
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-2
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 3.9E-07 2.3E-03 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 3.0E-08 1.8E-04 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-2
CAS #Chemical Name:
Soil Gas Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 24 0.72 -6.5E+03 2.2E-05
71-43-2 Benzene 0 0 3.6E-01 6.3E+00 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 3.1 0.093 -1.5E+02 1.3E-04
67-66-3 Chloroform 1.6 0.048 1.2E-01 2.0E+01 3.9E-07 4.7E-04
110-82-7 Cyclohexane 0 0 -1.3E+03 0.0E+00
75-71-8 Dichlorodifluoromethane 3.3 0.099 -2.1E+01 9.5E-04
75-34-3 Dichloroethane, 1,1-0 0 1.8E+00 -0.0E+00
75-35-4 Dichloroethylene, 1,1-0 0 -4.2E+01 0.0E+00
156-59-2 Dichloroethylene, cis-1,2-0 0 --
156-60-5 Dichloroethylene, trans-1,2-0 0 -8.3E+00 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -2.1E+03 0.0E+00
100-41-4 Ethylbenzene 0 0 1.1E+00 2.1E+02 0.0E+00 0.0E+00
142-82-5 Heptane, N-0 0 -8.3E+01 0.0E+00
110-54-3 Hexane, N-0 0 -1.5E+02 0.0E+00
67-63-0 Isopropanol 4.2 0.126 -4.2E+01 6.0E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)1.7 0.051 -1.0E+03 9.8E-06
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -6.3E+02 0.0E+00
75-09-2 Methylene Chloride 2.1 0.063 1.0E+02 1.3E+02 6.2E-10 1.0E-04
100-42-5 Styrene 0 0 -2.1E+02 0.0E+00
127-18-4 Tetrachloroethylene 0 0 1.1E+01 8.3E+00 0.0E+00 0.0E+00
108-88-3 Toluene 0 0 -1.0E+03 0.0E+00
71-55-6 Trichloroethane, 1,1,1-0 0 -1.0E+03 0.0E+00
79-01-6 Trichloroethylene 0 0 4.8E-01 4.2E-01 0.0E+00 0.0E+00
75-69-4 Trichlorofluoromethane 0 0 --
95-63-6 Trimethylbenzene, 1,2,4-0 0 -1.3E+01 0.0E+00
75-01-4 Vinyl Chloride 0 0 1.7E-01 2.1E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-0 0 -2.1E+01 0.0E+00
95-47-6 Xylene, o-0 0 -2.1E+01 0.0E+00
Cumulative:3.9E-07 2.3E-03
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-2
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard
Quotient
67-64-1 Acetone 24 0.24 -2.7E+04 1.8E-06
71-43-2 Benzene 0 0 1.6E+00 2.6E+01 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 3.1 0.031 -6.1E+02 1.0E-05
67-66-3 Chloroform 1.6 0.016 5.3E-01 8.6E+01 3.0E-08 3.7E-05
110-82-7 Cyclohexane 0 0 -5.3E+03 0.0E+00
75-71-8 Dichlorodifluoromethane 3.3 0.033 -8.8E+01 7.5E-0575-34-3 Dichloroethane, 1,1-0 0 7.7E+00 -0.0E+0075-35-4 Dichloroethylene, 1,1-0 0 -1.8E+02 0.0E+00156-59-2 Dichloroethylene, cis-1,2-0 0 --156-60-5 Dichloroethylene, trans-1,2-0 0 -3.5E+01 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -8.8E+03 0.0E+00
100-41-4 Ethylbenzene 0 0 4.9E+00 8.8E+02 0.0E+00 0.0E+00
142-82-5 Heptane, N-0 0 -3.5E+02 0.0E+00
110-54-3 Hexane, N-0 0 -6.1E+02 0.0E+00
67-63-0 Isopropanol 4.2 0.042 -1.8E+02 4.8E-0578-93-3 Methyl Ethyl Ketone (2-Butanone)1.7 0.017 -4.4E+03 7.8E-07108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -2.6E+03 0.0E+0075-09-2 Methylene Chloride 2.1 0.021 1.2E+03 5.3E+02 1.7E-11 8.0E-06
100-42-5 Styrene 0 0 -8.8E+02 0.0E+00
127-18-4 Tetrachloroethylene 0 0 4.7E+01 3.5E+01 0.0E+00 0.0E+00
108-88-3 Toluene 0 0 -4.4E+03 0.0E+00
71-55-6 Trichloroethane, 1,1,1-0 0 -4.4E+03 0.0E+00
79-01-6 Trichloroethylene 0 0 3.0E+00 1.8E+00 0.0E+00 0.0E+0075-69-4 Trichlorofluoromethane 0 0 --95-63-6 Trimethylbenzene, 1,2,4-0 0 -5.3E+01 0.0E+0075-01-4 Vinyl Chloride 0 0 2.8E+00 8.8E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-0 0 -8.8E+01 0.0E+00
95-47-6 Xylene, o-0 0 -8.8E+01 0.0E+00
Cumulative:3.0E-08 1.8E-04
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
SS-3
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-3
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-3
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
Input Form 1B
Exposure Unit ID: SS-3
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
2373
0.2
200
6365
0.78
0.54
1
70
80
20
350
24
6032
0.07
100
19652
2.5
0.71
1
1
70
80
330
1
250
8
3527
0.3
50
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: SS-3
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Unit ID: SS-3
Description of Exposure Point Concentration Selection:
Exposure Point Concentration
(ug/m3)Notes:CAS Number Chemical Minimum Concentration (Qualifier)
Maximum Concentration (Qualifier)
Units Location of Maximum Concentration
Detection Frequency
Range of Detection Limits
Concentration Used for Screening
Background Value
Screening Toxicity Value (Screening Level) (n/c)
Potential ARAR/TBC Value
Potential ARAR/TBC Source
COPC Flag (Y/N)
Rationale for Selection or Deletion
6 67-64-1 Acetone ug/m3
0 71-43-2 Benzene ug/m3
2.6 75-15-0 Carbon Disulfide ug/m3
0 67-66-3 Chloroform ug/m3
0 110-82-7 Cyclohexane ug/m3
3.7 75-71-8 Dichlorodifluoromethane ug/m3
0 75-34-3 Dichloroethane, 1,1-ug/m3
0 75-35-4 Dichloroethylene, 1,1-ug/m3
0 156-59-2 Dichloroethylene, cis-1,2-ug/m3
0 156-60-5 Dichloroethylene, trans-1,2-ug/m3
0 75-00-3 Ethyl Chloride (Chloroethane)ug/m3
5.1 100-41-4 Ethylbenzene ug/m3
0 142-82-5 Heptane, N-ug/m3
0 110-54-3 Hexane, N-ug/m3
5.7 67-63-0 Isopropanol ug/m3
1 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
0 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3
2.2 75-09-2 Methylene Chloride ug/m3
0 100-42-5 Styrene ug/m3
0 127-18-4 Tetrachloroethylene ug/m3
0 108-88-3 Toluene ug/m3
13 71-55-6 Trichloroethane, 1,1,1-ug/m3
0 79-01-6 Trichloroethylene ug/m3
2 75-69-4 Trichlorofluoromethane ug/m3
0 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
0 75-01-4 Vinyl Chloride ug/m3
40 108-38-3 Xylene, m-ug/m3
15 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Exposure Point Concentrations based on detections in sample SS-3.
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-3
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.4E-07 1.8E-02 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.0E-08 1.4E-03 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-3
CAS #Chemical Name:
Soil Gas Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 6 0.18 -6.5E+03 5.6E-06
71-43-2 Benzene 0 0 3.6E-01 6.3E+00 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 2.6 0.078 -1.5E+02 1.1E-04
67-66-3 Chloroform 0 0 1.2E-01 2.0E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 0 0 -1.3E+03 0.0E+00
75-71-8 Dichlorodifluoromethane 3.7 0.111 -2.1E+01 1.1E-03
75-34-3 Dichloroethane, 1,1-0 0 1.8E+00 -0.0E+00
75-35-4 Dichloroethylene, 1,1-0 0 -4.2E+01 0.0E+00
156-59-2 Dichloroethylene, cis-1,2-0 0 --
156-60-5 Dichloroethylene, trans-1,2-0 0 -8.3E+00 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -2.1E+03 0.0E+00
100-41-4 Ethylbenzene 5.1 0.153 1.1E+00 2.1E+02 1.4E-07 1.5E-04
142-82-5 Heptane, N-0 0 -8.3E+01 0.0E+00
110-54-3 Hexane, N-0 0 -1.5E+02 0.0E+00
67-63-0 Isopropanol 5.7 0.171 -4.2E+01 8.2E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)1 0.03 -1.0E+03 5.8E-06
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -6.3E+02 0.0E+00
75-09-2 Methylene Chloride 2.2 0.066 1.0E+02 1.3E+02 6.5E-10 1.1E-04
100-42-5 Styrene 0 0 -2.1E+02 0.0E+00
127-18-4 Tetrachloroethylene 0 0 1.1E+01 8.3E+00 0.0E+00 0.0E+00
108-88-3 Toluene 0 0 -1.0E+03 0.0E+00
71-55-6 Trichloroethane, 1,1,1-13 0.39 -1.0E+03 7.5E-05
79-01-6 Trichloroethylene 0 0 4.8E-01 4.2E-01 0.0E+00 0.0E+00
75-69-4 Trichlorofluoromethane 2 0.06 --
95-63-6 Trimethylbenzene, 1,2,4-0 0 -1.3E+01 0.0E+00
75-01-4 Vinyl Chloride 0 0 1.7E-01 2.1E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-40 1.2 -2.1E+01 1.2E-02
95-47-6 Xylene, o-15 0.45 -2.1E+01 4.3E-03
Cumulative:1.4E-07 1.8E-02
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-3
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard
Quotient
67-64-1 Acetone 6 0.06 -2.7E+04 4.4E-07
71-43-2 Benzene 0 0 1.6E+00 2.6E+01 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 2.6 0.026 -6.1E+02 8.5E-06
67-66-3 Chloroform 0 0 5.3E-01 8.6E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 0 0 -5.3E+03 0.0E+00
75-71-8 Dichlorodifluoromethane 3.7 0.037 -8.8E+01 8.4E-0575-34-3 Dichloroethane, 1,1-0 0 7.7E+00 -0.0E+0075-35-4 Dichloroethylene, 1,1-0 0 -1.8E+02 0.0E+00156-59-2 Dichloroethylene, cis-1,2-0 0 --156-60-5 Dichloroethylene, trans-1,2-0 0 -3.5E+01 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -8.8E+03 0.0E+00
100-41-4 Ethylbenzene 5.1 0.051 4.9E+00 8.8E+02 1.0E-08 1.2E-05
142-82-5 Heptane, N-0 0 -3.5E+02 0.0E+00
110-54-3 Hexane, N-0 0 -6.1E+02 0.0E+00
67-63-0 Isopropanol 5.7 0.057 -1.8E+02 6.5E-0578-93-3 Methyl Ethyl Ketone (2-Butanone)1 0.01 -4.4E+03 4.6E-07108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -2.6E+03 0.0E+0075-09-2 Methylene Chloride 2.2 0.022 1.2E+03 5.3E+02 1.8E-11 8.4E-06
100-42-5 Styrene 0 0 -8.8E+02 0.0E+00
127-18-4 Tetrachloroethylene 0 0 4.7E+01 3.5E+01 0.0E+00 0.0E+00
108-88-3 Toluene 0 0 -4.4E+03 0.0E+00
71-55-6 Trichloroethane, 1,1,1-13 0.13 -4.4E+03 5.9E-06
79-01-6 Trichloroethylene 0 0 3.0E+00 1.8E+00 0.0E+00 0.0E+0075-69-4 Trichlorofluoromethane 2 0.02 --95-63-6 Trimethylbenzene, 1,2,4-0 0 -5.3E+01 0.0E+0075-01-4 Vinyl Chloride 0 0 2.8E+00 8.8E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-40 0.4 -8.8E+01 9.1E-04
95-47-6 Xylene, o-15 0.15 -8.8E+01 3.4E-04
Cumulative:1.0E-08 1.4E-03
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
SS-4
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-4
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-4
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
Input Form 1B
Exposure Unit ID: SS-4
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
2373
0.2
200
6365
0.78
0.54
1
70
80
20
350
24
6032
0.07
100
19652
2.5
0.71
1
1
70
80
330
1
250
8
3527
0.3
50
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: SS-4
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Unit ID: SS-4
Description of Exposure Point Concentration Selection:
Exposure Point Concentration
(ug/m3)Notes:CAS Number Chemical Minimum Concentration (Qualifier)
Maximum Concentration (Qualifier)
Units Location of Maximum Concentration
Detection Frequency
Range of Detection Limits
Concentration Used for Screening
Background Value
Screening Toxicity Value (Screening Level) (n/c)
Potential ARAR/TBC Value
Potential ARAR/TBC Source
COPC Flag (Y/N)
Rationale for Selection or Deletion
7.2 67-64-1 Acetone ug/m3
0 71-43-2 Benzene ug/m3
2.7 75-15-0 Carbon Disulfide ug/m3
0 67-66-3 Chloroform ug/m3
2.3 110-82-7 Cyclohexane ug/m3
3.3 75-71-8 Dichlorodifluoromethane ug/m3
0 75-34-3 Dichloroethane, 1,1-ug/m3
0 75-35-4 Dichloroethylene, 1,1-ug/m3
0 156-59-2 Dichloroethylene, cis-1,2-ug/m3
0 156-60-5 Dichloroethylene, trans-1,2-ug/m3
0 75-00-3 Ethyl Chloride (Chloroethane)ug/m3
0 100-41-4 Ethylbenzene ug/m3
0 142-82-5 Heptane, N-ug/m3
0 110-54-3 Hexane, N-ug/m3
5.4 67-63-0 Isopropanol ug/m3
0.74 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
0 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3
0 75-09-2 Methylene Chloride ug/m3
0 100-42-5 Styrene ug/m3
0 127-18-4 Tetrachloroethylene ug/m3
0 108-88-3 Toluene ug/m3
3.7 71-55-6 Trichloroethane, 1,1,1-ug/m3
0 79-01-6 Trichloroethylene ug/m3
0 75-69-4 Trichlorofluoromethane ug/m3
0 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
0 75-01-4 Vinyl Chloride ug/m3
0 108-38-3 Xylene, m-ug/m3
0 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Exposure Point Concentrations based on detections in sample SS-4.
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-4
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 0.0E+00 1.9E-03 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 0.0E+00 1.5E-04 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-4
CAS #Chemical Name:
Soil Gas Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 7.2 0.216 -6.5E+03 6.7E-06
71-43-2 Benzene 0 0 3.6E-01 6.3E+00 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 2.7 0.081 -1.5E+02 1.1E-04
67-66-3 Chloroform 0 0 1.2E-01 2.0E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 2.3 0.069 -1.3E+03 1.1E-05
75-71-8 Dichlorodifluoromethane 3.3 0.099 -2.1E+01 9.5E-04
75-34-3 Dichloroethane, 1,1-0 0 1.8E+00 -0.0E+00
75-35-4 Dichloroethylene, 1,1-0 0 -4.2E+01 0.0E+00
156-59-2 Dichloroethylene, cis-1,2-0 0 --
156-60-5 Dichloroethylene, trans-1,2-0 0 -8.3E+00 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -2.1E+03 0.0E+00
100-41-4 Ethylbenzene 0 0 1.1E+00 2.1E+02 0.0E+00 0.0E+00
142-82-5 Heptane, N-0 0 -8.3E+01 0.0E+00
110-54-3 Hexane, N-0 0 -1.5E+02 0.0E+00
67-63-0 Isopropanol 5.4 0.162 -4.2E+01 7.8E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)0.74 0.0222 -1.0E+03 4.3E-06
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -6.3E+02 0.0E+00
75-09-2 Methylene Chloride 0 0 1.0E+02 1.3E+02 0.0E+00 0.0E+00
100-42-5 Styrene 0 0 -2.1E+02 0.0E+00
127-18-4 Tetrachloroethylene 0 0 1.1E+01 8.3E+00 0.0E+00 0.0E+00
108-88-3 Toluene 0 0 -1.0E+03 0.0E+00
71-55-6 Trichloroethane, 1,1,1-3.7 0.111 -1.0E+03 2.1E-05
79-01-6 Trichloroethylene 0 0 4.8E-01 4.2E-01 0.0E+00 0.0E+00
75-69-4 Trichlorofluoromethane 0 0 --
95-63-6 Trimethylbenzene, 1,2,4-0 0 -1.3E+01 0.0E+00
75-01-4 Vinyl Chloride 0 0 1.7E-01 2.1E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-0 0 -2.1E+01 0.0E+00
95-47-6 Xylene, o-0 0 -2.1E+01 0.0E+00
Cumulative:0.0E+00 1.9E-03
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-4
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard
Quotient
67-64-1 Acetone 7.2 0.072 -2.7E+04 5.3E-07
71-43-2 Benzene 0 0 1.6E+00 2.6E+01 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 2.7 0.027 -6.1E+02 8.8E-06
67-66-3 Chloroform 0 0 5.3E-01 8.6E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 2.3 0.023 -5.3E+03 8.8E-07
75-71-8 Dichlorodifluoromethane 3.3 0.033 -8.8E+01 7.5E-0575-34-3 Dichloroethane, 1,1-0 0 7.7E+00 -0.0E+0075-35-4 Dichloroethylene, 1,1-0 0 -1.8E+02 0.0E+00156-59-2 Dichloroethylene, cis-1,2-0 0 --156-60-5 Dichloroethylene, trans-1,2-0 0 -3.5E+01 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -8.8E+03 0.0E+00
100-41-4 Ethylbenzene 0 0 4.9E+00 8.8E+02 0.0E+00 0.0E+00
142-82-5 Heptane, N-0 0 -3.5E+02 0.0E+00
110-54-3 Hexane, N-0 0 -6.1E+02 0.0E+00
67-63-0 Isopropanol 5.4 0.054 -1.8E+02 6.2E-0578-93-3 Methyl Ethyl Ketone (2-Butanone)0.74 0.0074 -4.4E+03 3.4E-07108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -2.6E+03 0.0E+0075-09-2 Methylene Chloride 0 0 1.2E+03 5.3E+02 0.0E+00 0.0E+00
100-42-5 Styrene 0 0 -8.8E+02 0.0E+00
127-18-4 Tetrachloroethylene 0 0 4.7E+01 3.5E+01 0.0E+00 0.0E+00
108-88-3 Toluene 0 0 -4.4E+03 0.0E+00
71-55-6 Trichloroethane, 1,1,1-3.7 0.037 -4.4E+03 1.7E-06
79-01-6 Trichloroethylene 0 0 3.0E+00 1.8E+00 0.0E+00 0.0E+0075-69-4 Trichlorofluoromethane 0 0 --95-63-6 Trimethylbenzene, 1,2,4-0 0 -5.3E+01 0.0E+0075-01-4 Vinyl Chloride 0 0 2.8E+00 8.8E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-0 0 -8.8E+01 0.0E+00
95-47-6 Xylene, o-0 0 -8.8E+01 0.0E+00
Cumulative:0.0E+00 1.5E-04
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
SS-5
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-5
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-5
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
Input Form 1B
Exposure Unit ID: SS-5
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
2373
0.2
200
6365
0.78
0.54
1
70
80
20
350
24
6032
0.07
100
19652
2.5
0.71
1
1
70
80
330
1
250
8
3527
0.3
50
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: SS-5
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Unit ID: SS-5
Description of Exposure Point Concentration Selection:
Exposure Point Concentration
(ug/m3)Notes:CAS Number Chemical Minimum Concentration (Qualifier)
Maximum Concentration (Qualifier)
Units Location of Maximum Concentration
Detection Frequency
Range of Detection Limits
Concentration Used for Screening
Background Value
Screening Toxicity Value (Screening Level) (n/c)
Potential ARAR/TBC Value
Potential ARAR/TBC Source
COPC Flag (Y/N)
Rationale for Selection or Deletion
53 67-64-1 Acetone ug/m3
0 71-43-2 Benzene ug/m3
3.5 75-15-0 Carbon Disulfide ug/m3
0 67-66-3 Chloroform ug/m3
4.2 110-82-7 Cyclohexane ug/m3
5.6 75-71-8 Dichlorodifluoromethane ug/m3
0 75-34-3 Dichloroethane, 1,1-ug/m3
0 75-35-4 Dichloroethylene, 1,1-ug/m3
0 156-59-2 Dichloroethylene, cis-1,2-ug/m3
0 156-60-5 Dichloroethylene, trans-1,2-ug/m3
0 75-00-3 Ethyl Chloride (Chloroethane)ug/m3
1.5 100-41-4 Ethylbenzene ug/m3
0 142-82-5 Heptane, N-ug/m3
0 110-54-3 Hexane, N-ug/m3
12 67-63-0 Isopropanol ug/m3
4.7 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
5.8 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3
6.7 75-09-2 Methylene Chloride ug/m3
0 100-42-5 Styrene ug/m3
0 127-18-4 Tetrachloroethylene ug/m3
2.3 108-88-3 Toluene ug/m3
0 71-55-6 Trichloroethane, 1,1,1-ug/m3
0 79-01-6 Trichloroethylene ug/m3
2.2 75-69-4 Trichlorofluoromethane ug/m3
5.5 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
0 75-01-4 Vinyl Chloride ug/m3
5.1 108-38-3 Xylene, m-ug/m3
1.9 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Exposure Point Concentrations based on detections in sample SS-5.
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-5
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 4.2E-08 8.7E-03 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 3.1E-09 6.9E-04 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-5
CAS #Chemical Name:
Soil Gas Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 53 1.59 -6.5E+03 4.9E-05
71-43-2 Benzene 0 0 3.6E-01 6.3E+00 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 3.5 0.105 -1.5E+02 1.4E-04
67-66-3 Chloroform 0 0 1.2E-01 2.0E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 4.2 0.126 -1.3E+03 2.0E-05
75-71-8 Dichlorodifluoromethane 5.6 0.168 -2.1E+01 1.6E-03
75-34-3 Dichloroethane, 1,1-0 0 1.8E+00 -0.0E+00
75-35-4 Dichloroethylene, 1,1-0 0 -4.2E+01 0.0E+00
156-59-2 Dichloroethylene, cis-1,2-0 0 --
156-60-5 Dichloroethylene, trans-1,2-0 0 -8.3E+00 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -2.1E+03 0.0E+00
100-41-4 Ethylbenzene 1.5 0.045 1.1E+00 2.1E+02 4.0E-08 4.3E-05
142-82-5 Heptane, N-0 0 -8.3E+01 0.0E+00
110-54-3 Hexane, N-0 0 -1.5E+02 0.0E+00
67-63-0 Isopropanol 12 0.36 -4.2E+01 1.7E-03
78-93-3 Methyl Ethyl Ketone (2-Butanone)4.7 0.141 -1.0E+03 2.7E-05
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)5.8 0.174 -6.3E+02 5.6E-05
75-09-2 Methylene Chloride 6.7 0.201 1.0E+02 1.3E+02 2.0E-09 3.2E-04
100-42-5 Styrene 0 0 -2.1E+02 0.0E+00
127-18-4 Tetrachloroethylene 0 0 1.1E+01 8.3E+00 0.0E+00 0.0E+00
108-88-3 Toluene 2.3 0.069 -1.0E+03 1.3E-05
71-55-6 Trichloroethane, 1,1,1-0 0 -1.0E+03 0.0E+00
79-01-6 Trichloroethylene 0 0 4.8E-01 4.2E-01 0.0E+00 0.0E+00
75-69-4 Trichlorofluoromethane 2.2 0.066 --
95-63-6 Trimethylbenzene, 1,2,4-5.5 0.165 -1.3E+01 2.6E-03
75-01-4 Vinyl Chloride 0 0 1.7E-01 2.1E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-5.1 0.153 -2.1E+01 1.5E-03
95-47-6 Xylene, o-1.9 0.057 -2.1E+01 5.5E-04
Cumulative:4.2E-08 8.7E-03
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-5
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard
Quotient
67-64-1 Acetone 53 0.53 -2.7E+04 3.9E-06
71-43-2 Benzene 0 0 1.6E+00 2.6E+01 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 3.5 0.035 -6.1E+02 1.1E-05
67-66-3 Chloroform 0 0 5.3E-01 8.6E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 4.2 0.042 -5.3E+03 1.6E-06
75-71-8 Dichlorodifluoromethane 5.6 0.056 -8.8E+01 1.3E-0475-34-3 Dichloroethane, 1,1-0 0 7.7E+00 -0.0E+0075-35-4 Dichloroethylene, 1,1-0 0 -1.8E+02 0.0E+00156-59-2 Dichloroethylene, cis-1,2-0 0 --156-60-5 Dichloroethylene, trans-1,2-0 0 -3.5E+01 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -8.8E+03 0.0E+00
100-41-4 Ethylbenzene 1.5 0.015 4.9E+00 8.8E+02 3.1E-09 3.4E-06
142-82-5 Heptane, N-0 0 -3.5E+02 0.0E+00
110-54-3 Hexane, N-0 0 -6.1E+02 0.0E+00
67-63-0 Isopropanol 12 0.12 -1.8E+02 1.4E-0478-93-3 Methyl Ethyl Ketone (2-Butanone)4.7 0.047 -4.4E+03 2.1E-06108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)5.8 0.058 -2.6E+03 4.4E-0675-09-2 Methylene Chloride 6.7 0.067 1.2E+03 5.3E+02 5.5E-11 2.5E-05
100-42-5 Styrene 0 0 -8.8E+02 0.0E+00
127-18-4 Tetrachloroethylene 0 0 4.7E+01 3.5E+01 0.0E+00 0.0E+00
108-88-3 Toluene 2.3 0.023 -4.4E+03 1.1E-06
71-55-6 Trichloroethane, 1,1,1-0 0 -4.4E+03 0.0E+00
79-01-6 Trichloroethylene 0 0 3.0E+00 1.8E+00 0.0E+00 0.0E+0075-69-4 Trichlorofluoromethane 2.2 0.022 --95-63-6 Trimethylbenzene, 1,2,4-5.5 0.055 -5.3E+01 2.1E-0475-01-4 Vinyl Chloride 0 0 2.8E+00 8.8E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-5.1 0.051 -8.8E+01 1.2E-04
95-47-6 Xylene, o-1.9 0.019 -8.8E+01 4.3E-05
Cumulative:3.1E-09 6.9E-04
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
SS-6
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-6
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-6
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
Input Form 1B
Exposure Unit ID: SS-6
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
2373
0.2
200
6365
0.78
0.54
1
70
80
20
350
24
6032
0.07
100
19652
2.5
0.71
1
1
70
80
330
1
250
8
3527
0.3
50
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: SS-6
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Unit ID: SS-6
Description of Exposure Point Concentration Selection:
Exposure Point Concentration
(ug/m3)Notes:CAS Number Chemical Minimum Concentration (Qualifier)
Maximum Concentration (Qualifier)
Units Location of Maximum Concentration
Detection Frequency
Range of Detection Limits
Concentration Used for Screening
Background Value
Screening Toxicity Value (Screening Level) (n/c)
Potential ARAR/TBC Value
Potential ARAR/TBC Source
COPC Flag (Y/N)
Rationale for Selection or Deletion
16 67-64-1 Acetone ug/m3
0 71-43-2 Benzene ug/m3
3.1 75-15-0 Carbon Disulfide ug/m3
0 67-66-3 Chloroform ug/m3
0 110-82-7 Cyclohexane ug/m3
3.2 75-71-8 Dichlorodifluoromethane ug/m3
0 75-34-3 Dichloroethane, 1,1-ug/m3
0 75-35-4 Dichloroethylene, 1,1-ug/m3
0 156-59-2 Dichloroethylene, cis-1,2-ug/m3
0 156-60-5 Dichloroethylene, trans-1,2-ug/m3
0 75-00-3 Ethyl Chloride (Chloroethane)ug/m3
1.5 100-41-4 Ethylbenzene ug/m3
0 142-82-5 Heptane, N-ug/m3
0 110-54-3 Hexane, N-ug/m3
4.2 67-63-0 Isopropanol ug/m3
1.5 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
0 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3
2.2 75-09-2 Methylene Chloride ug/m3
0 100-42-5 Styrene ug/m3
0 127-18-4 Tetrachloroethylene ug/m3
1.4 108-88-3 Toluene ug/m3
0 71-55-6 Trichloroethane, 1,1,1-ug/m3
0 79-01-6 Trichloroethylene ug/m3
2 75-69-4 Trichlorofluoromethane ug/m3
0 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
0 75-01-4 Vinyl Chloride ug/m3
1.8 108-38-3 Xylene, m-ug/m3
0 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Exposure Point Concentrations based on detections in sample SS-6.
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-6
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 4.1E-08 2.4E-03 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 3.1E-09 1.9E-04 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-6
CAS #Chemical Name:
Soil Gas Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 16 0.48 -6.5E+03 1.5E-05
71-43-2 Benzene 0 0 3.6E-01 6.3E+00 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 3.1 0.093 -1.5E+02 1.3E-04
67-66-3 Chloroform 0 0 1.2E-01 2.0E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 0 0 -1.3E+03 0.0E+00
75-71-8 Dichlorodifluoromethane 3.2 0.096 -2.1E+01 9.2E-04
75-34-3 Dichloroethane, 1,1-0 0 1.8E+00 -0.0E+00
75-35-4 Dichloroethylene, 1,1-0 0 -4.2E+01 0.0E+00
156-59-2 Dichloroethylene, cis-1,2-0 0 --
156-60-5 Dichloroethylene, trans-1,2-0 0 -8.3E+00 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -2.1E+03 0.0E+00
100-41-4 Ethylbenzene 1.5 0.045 1.1E+00 2.1E+02 4.0E-08 4.3E-05
142-82-5 Heptane, N-0 0 -8.3E+01 0.0E+00
110-54-3 Hexane, N-0 0 -1.5E+02 0.0E+00
67-63-0 Isopropanol 4.2 0.126 -4.2E+01 6.0E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)1.5 0.045 -1.0E+03 8.6E-06
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -6.3E+02 0.0E+00
75-09-2 Methylene Chloride 2.2 0.066 1.0E+02 1.3E+02 6.5E-10 1.1E-04
100-42-5 Styrene 0 0 -2.1E+02 0.0E+00
127-18-4 Tetrachloroethylene 0 0 1.1E+01 8.3E+00 0.0E+00 0.0E+00
108-88-3 Toluene 1.4 0.042 -1.0E+03 8.1E-06
71-55-6 Trichloroethane, 1,1,1-0 0 -1.0E+03 0.0E+00
79-01-6 Trichloroethylene 0 0 4.8E-01 4.2E-01 0.0E+00 0.0E+00
75-69-4 Trichlorofluoromethane 2 0.06 --
95-63-6 Trimethylbenzene, 1,2,4-0 0 -1.3E+01 0.0E+00
75-01-4 Vinyl Chloride 0 0 1.7E-01 2.1E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-1.8 0.054 -2.1E+01 5.2E-04
95-47-6 Xylene, o-0 0 -2.1E+01 0.0E+00
Cumulative:4.1E-08 2.4E-03
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-6
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard
Quotient
67-64-1 Acetone 16 0.16 -2.7E+04 1.2E-06
71-43-2 Benzene 0 0 1.6E+00 2.6E+01 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 3.1 0.031 -6.1E+02 1.0E-05
67-66-3 Chloroform 0 0 5.3E-01 8.6E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 0 0 -5.3E+03 0.0E+00
75-71-8 Dichlorodifluoromethane 3.2 0.032 -8.8E+01 7.3E-0575-34-3 Dichloroethane, 1,1-0 0 7.7E+00 -0.0E+0075-35-4 Dichloroethylene, 1,1-0 0 -1.8E+02 0.0E+00156-59-2 Dichloroethylene, cis-1,2-0 0 --156-60-5 Dichloroethylene, trans-1,2-0 0 -3.5E+01 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -8.8E+03 0.0E+00
100-41-4 Ethylbenzene 1.5 0.015 4.9E+00 8.8E+02 3.1E-09 3.4E-06
142-82-5 Heptane, N-0 0 -3.5E+02 0.0E+00
110-54-3 Hexane, N-0 0 -6.1E+02 0.0E+00
67-63-0 Isopropanol 4.2 0.042 -1.8E+02 4.8E-0578-93-3 Methyl Ethyl Ketone (2-Butanone)1.5 0.015 -4.4E+03 6.8E-07108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0 0 -2.6E+03 0.0E+0075-09-2 Methylene Chloride 2.2 0.022 1.2E+03 5.3E+02 1.8E-11 8.4E-06
100-42-5 Styrene 0 0 -8.8E+02 0.0E+00
127-18-4 Tetrachloroethylene 0 0 4.7E+01 3.5E+01 0.0E+00 0.0E+00
108-88-3 Toluene 1.4 0.014 -4.4E+03 6.4E-07
71-55-6 Trichloroethane, 1,1,1-0 0 -4.4E+03 0.0E+00
79-01-6 Trichloroethylene 0 0 3.0E+00 1.8E+00 0.0E+00 0.0E+0075-69-4 Trichlorofluoromethane 2 0.02 --95-63-6 Trimethylbenzene, 1,2,4-0 0 -5.3E+01 0.0E+0075-01-4 Vinyl Chloride 0 0 2.8E+00 8.8E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-1.8 0.018 -8.8E+01 4.1E-05
95-47-6 Xylene, o-0 0 -8.8E+01 0.0E+00
Cumulative:3.1E-09 1.9E-04
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
SS-7
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-7
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-7
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
Input Form 1B
Exposure Unit ID: SS-7
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
2373
0.2
200
6365
0.78
0.54
1
70
80
20
350
24
6032
0.07
100
19652
2.5
0.71
1
1
70
80
330
1
250
8
3527
0.3
50
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: SS-7
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Unit ID: SS-7
Description of Exposure Point Concentration Selection:
Exposure Point Concentration
(ug/m3)Notes:CAS Number Chemical Minimum Concentration (Qualifier)
Maximum Concentration (Qualifier)
Units Location of Maximum Concentration
Detection Frequency
Range of Detection Limits
Concentration Used for Screening
Background Value
Screening Toxicity Value (Screening Level) (n/c)
Potential ARAR/TBC Value
Potential ARAR/TBC Source
COPC Flag (Y/N)
Rationale for Selection or Deletion
7 67-64-1 Acetone ug/m3
0 71-43-2 Benzene ug/m3
2.2 75-15-0 Carbon Disulfide ug/m3
0 67-66-3 Chloroform ug/m3
6.4 110-82-7 Cyclohexane ug/m3
3.1 75-71-8 Dichlorodifluoromethane ug/m3
0 75-34-3 Dichloroethane, 1,1-ug/m3
0 75-35-4 Dichloroethylene, 1,1-ug/m3
0 156-59-2 Dichloroethylene, cis-1,2-ug/m3
0 156-60-5 Dichloroethylene, trans-1,2-ug/m3
0 75-00-3 Ethyl Chloride (Chloroethane)ug/m3
0 100-41-4 Ethylbenzene ug/m3
0 142-82-5 Heptane, N-ug/m3
0 110-54-3 Hexane, N-ug/m3
8.9 67-63-0 Isopropanol ug/m3
0.83 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
4.6 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3
5.9 75-09-2 Methylene Chloride ug/m3
0 100-42-5 Styrene ug/m3
4.9 127-18-4 Tetrachloroethylene ug/m3
0.87 108-88-3 Toluene ug/m3
0 71-55-6 Trichloroethane, 1,1,1-ug/m3
8.7 79-01-6 Trichloroethylene ug/m3
1.9 75-69-4 Trichlorofluoromethane ug/m3
0 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
0 75-01-4 Vinyl Chloride ug/m3
0 108-38-3 Xylene, m-ug/m3
0 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Exposure Point Concentrations based on detections in sample SS-7.
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-7
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 5.6E-07 1.3E-01 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 3.0E-08 1.0E-02 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-7
CAS #Chemical Name:
Soil Gas Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 7 0.21 -6.5E+03 6.5E-06
71-43-2 Benzene 0 0 3.6E-01 6.3E+00 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 2.2 0.066 -1.5E+02 9.0E-05
67-66-3 Chloroform 0 0 1.2E-01 2.0E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 6.4 0.192 -1.3E+03 3.1E-05
75-71-8 Dichlorodifluoromethane 3.1 0.093 -2.1E+01 8.9E-04
75-34-3 Dichloroethane, 1,1-0 0 1.8E+00 -0.0E+00
75-35-4 Dichloroethylene, 1,1-0 0 -4.2E+01 0.0E+00
156-59-2 Dichloroethylene, cis-1,2-0 0 --
156-60-5 Dichloroethylene, trans-1,2-0 0 -8.3E+00 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -2.1E+03 0.0E+00
100-41-4 Ethylbenzene 0 0 1.1E+00 2.1E+02 0.0E+00 0.0E+00
142-82-5 Heptane, N-0 0 -8.3E+01 0.0E+00
110-54-3 Hexane, N-0 0 -1.5E+02 0.0E+00
67-63-0 Isopropanol 8.9 0.267 -4.2E+01 1.3E-03
78-93-3 Methyl Ethyl Ketone (2-Butanone)0.83 0.0249 -1.0E+03 4.8E-06
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)4.6 0.138 -6.3E+02 4.4E-05
75-09-2 Methylene Chloride 5.9 0.177 1.0E+02 1.3E+02 1.7E-09 2.8E-04
100-42-5 Styrene 0 0 -2.1E+02 0.0E+00
127-18-4 Tetrachloroethylene 4.9 0.147 1.1E+01 8.3E+00 1.4E-08 3.5E-03
108-88-3 Toluene 0.87 0.0261 -1.0E+03 5.0E-06
71-55-6 Trichloroethane, 1,1,1-0 0 -1.0E+03 0.0E+00
79-01-6 Trichloroethylene 8.7 0.261 4.8E-01 4.2E-01 5.5E-07 1.3E-01
75-69-4 Trichlorofluoromethane 1.9 0.057 --
95-63-6 Trimethylbenzene, 1,2,4-0 0 -1.3E+01 0.0E+00
75-01-4 Vinyl Chloride 0 0 1.7E-01 2.1E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-0 0 -2.1E+01 0.0E+00
95-47-6 Xylene, o-0 0 -2.1E+01 0.0E+00
Cumulative:5.6E-07 1.3E-01
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-7
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard
Quotient
67-64-1 Acetone 7 0.07 -2.7E+04 5.2E-07
71-43-2 Benzene 0 0 1.6E+00 2.6E+01 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 2.2 0.022 -6.1E+02 7.2E-06
67-66-3 Chloroform 0 0 5.3E-01 8.6E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 6.4 0.064 -5.3E+03 2.4E-06
75-71-8 Dichlorodifluoromethane 3.1 0.031 -8.8E+01 7.1E-0575-34-3 Dichloroethane, 1,1-0 0 7.7E+00 -0.0E+0075-35-4 Dichloroethylene, 1,1-0 0 -1.8E+02 0.0E+00156-59-2 Dichloroethylene, cis-1,2-0 0 --156-60-5 Dichloroethylene, trans-1,2-0 0 -3.5E+01 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -8.8E+03 0.0E+00
100-41-4 Ethylbenzene 0 0 4.9E+00 8.8E+02 0.0E+00 0.0E+00
142-82-5 Heptane, N-0 0 -3.5E+02 0.0E+00
110-54-3 Hexane, N-0 0 -6.1E+02 0.0E+00
67-63-0 Isopropanol 8.9 0.089 -1.8E+02 1.0E-0478-93-3 Methyl Ethyl Ketone (2-Butanone)0.83 0.0083 -4.4E+03 3.8E-07108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)4.6 0.046 -2.6E+03 3.5E-0675-09-2 Methylene Chloride 5.9 0.059 1.2E+03 5.3E+02 4.8E-11 2.2E-05
100-42-5 Styrene 0 0 -8.8E+02 0.0E+00
127-18-4 Tetrachloroethylene 4.9 0.049 4.7E+01 3.5E+01 1.0E-09 2.8E-04
108-88-3 Toluene 0.87 0.0087 -4.4E+03 4.0E-07
71-55-6 Trichloroethane, 1,1,1-0 0 -4.4E+03 0.0E+00
79-01-6 Trichloroethylene 8.7 0.087 3.0E+00 1.8E+00 2.9E-08 9.9E-0375-69-4 Trichlorofluoromethane 1.9 0.019 --95-63-6 Trimethylbenzene, 1,2,4-0 0 -5.3E+01 0.0E+0075-01-4 Vinyl Chloride 0 0 2.8E+00 8.8E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-0 0 -8.8E+01 0.0E+00
95-47-6 Xylene, o-0 0 -8.8E+01 0.0E+00
Cumulative:3.0E-08 1.0E-02
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
SS-8
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-8
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-8
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
1
70
80
330
1
250
8
3527
0.3
50
100
19652
2.5
0.71
1
20
350
24
6032
0.07
0.54
1
70
80
2373
0.2
200
6365
0.78
Input Form 1B
Exposure Unit ID: SS-8
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: SS-8
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021
Basis: November 2020 EPA RSL TableSite ID: 24008-20-060
Exposure Unit ID: SS-8
Description of Exposure Point Concentration Selection:
Exposure Point Concentration
(ug/m3)Notes:CAS Number Chemical Minimum Concentration (Qualifier)
Maximum Concentration (Qualifier)
Units Location of Maximum Concentration
Detection Frequency
Range of Detection Limits
Concentration Used for Screening
Background Value
Screening Toxicity Value (Screening Level) (n/c)
Potential ARAR/TBC Value
Potential ARAR/TBC Source
COPC Flag (Y/N)
Rationale for Selection or Deletion
9.5 67-64-1 Acetone ug/m3
0 71-43-2 Benzene ug/m3
1.9 75-15-0 Carbon Disulfide ug/m3
0 67-66-3 Chloroform ug/m3
2.5 110-82-7 Cyclohexane ug/m3
3.1 75-71-8 Dichlorodifluoromethane ug/m3
0 75-34-3 Dichloroethane, 1,1-ug/m3
0 75-35-4 Dichloroethylene, 1,1-ug/m3
0 156-59-2 Dichloroethylene, cis-1,2-ug/m3
0 156-60-5 Dichloroethylene, trans-1,2-ug/m3
0 75-00-3 Ethyl Chloride (Chloroethane)ug/m3
0 100-41-4 Ethylbenzene ug/m3
0 142-82-5 Heptane, N-ug/m3
0 110-54-3 Hexane, N-ug/m3
7.7 67-63-0 Isopropanol ug/m3
0.94 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
4.6 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3
6.9 75-09-2 Methylene Chloride ug/m3
0 100-42-5 Styrene ug/m3
3.1 127-18-4 Tetrachloroethylene ug/m3
2.3 108-88-3 Toluene ug/m3
0 71-55-6 Trichloroethane, 1,1,1-ug/m3
4.1 79-01-6 Trichloroethylene ug/m3
1.2 75-69-4 Trichlorofluoromethane ug/m3
0 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
0 75-01-4 Vinyl Chloride ug/m3
0 108-38-3 Xylene, m-ug/m3
0 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Exposure Point Concentrations based on detections in sample SS-8.
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-8
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 2.7E-07 6.4E-02 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.4E-08 5.1E-03 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-8
CAS #Chemical Name:
Soil Gas Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 9.5 0.285 -6.5E+03 8.8E-06
71-43-2 Benzene 0 0 3.6E-01 6.3E+00 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 1.9 0.057 -1.5E+02 7.8E-05
67-66-3 Chloroform 0 0 1.2E-01 2.0E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 2.5 0.075 -1.3E+03 1.2E-05
75-71-8 Dichlorodifluoromethane 3.1 0.093 -2.1E+01 8.9E-04
75-34-3 Dichloroethane, 1,1-0 0 1.8E+00 -0.0E+00
75-35-4 Dichloroethylene, 1,1-0 0 -4.2E+01 0.0E+00
156-59-2 Dichloroethylene, cis-1,2-0 0 --
156-60-5 Dichloroethylene, trans-1,2-0 0 -8.3E+00 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -2.1E+03 0.0E+00
100-41-4 Ethylbenzene 0 0 1.1E+00 2.1E+02 0.0E+00 0.0E+00
142-82-5 Heptane, N-0 0 -8.3E+01 0.0E+00
110-54-3 Hexane, N-0 0 -1.5E+02 0.0E+00
67-63-0 Isopropanol 7.7 0.231 -4.2E+01 1.1E-03
78-93-3 Methyl Ethyl Ketone (2-Butanone)0.94 0.0282 -1.0E+03 5.4E-06
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)4.6 0.138 -6.3E+02 4.4E-05
75-09-2 Methylene Chloride 6.9 0.207 1.0E+02 1.3E+02 2.0E-09 3.3E-04
100-42-5 Styrene 0 0 -2.1E+02 0.0E+00
127-18-4 Tetrachloroethylene 3.1 0.093 1.1E+01 8.3E+00 8.6E-09 2.2E-03
108-88-3 Toluene 2.3 0.069 -1.0E+03 1.3E-05
71-55-6 Trichloroethane, 1,1,1-0 0 -1.0E+03 0.0E+00
79-01-6 Trichloroethylene 4.1 0.123 4.8E-01 4.2E-01 2.6E-07 5.9E-02
75-69-4 Trichlorofluoromethane 1.2 0.036 --
95-63-6 Trimethylbenzene, 1,2,4-0 0 -1.3E+01 0.0E+00
75-01-4 Vinyl Chloride 0 0 1.7E-01 2.1E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-0 0 -2.1E+01 0.0E+00
95-47-6 Xylene, o-0 0 -2.1E+01 0.0E+00
Cumulative:2.7E-07 6.4E-02
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: SS-8
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard
Quotient
67-64-1 Acetone 9.5 0.095 -2.7E+04 7.0E-07
71-43-2 Benzene 0 0 1.6E+00 2.6E+01 0.0E+00 0.0E+00
75-15-0 Carbon Disulfide 1.9 0.019 -6.1E+02 6.2E-06
67-66-3 Chloroform 0 0 5.3E-01 8.6E+01 0.0E+00 0.0E+00
110-82-7 Cyclohexane 2.5 0.025 -5.3E+03 9.5E-07
75-71-8 Dichlorodifluoromethane 3.1 0.031 -8.8E+01 7.1E-0575-34-3 Dichloroethane, 1,1-0 0 7.7E+00 -0.0E+0075-35-4 Dichloroethylene, 1,1-0 0 -1.8E+02 0.0E+00156-59-2 Dichloroethylene, cis-1,2-0 0 --156-60-5 Dichloroethylene, trans-1,2-0 0 -3.5E+01 0.0E+00
75-00-3 Ethyl Chloride (Chloroethane)0 0 -8.8E+03 0.0E+00
100-41-4 Ethylbenzene 0 0 4.9E+00 8.8E+02 0.0E+00 0.0E+00
142-82-5 Heptane, N-0 0 -3.5E+02 0.0E+00
110-54-3 Hexane, N-0 0 -6.1E+02 0.0E+00
67-63-0 Isopropanol 7.7 0.077 -1.8E+02 8.8E-0578-93-3 Methyl Ethyl Ketone (2-Butanone)0.94 0.0094 -4.4E+03 4.3E-07108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)4.6 0.046 -2.6E+03 3.5E-0675-09-2 Methylene Chloride 6.9 0.069 1.2E+03 5.3E+02 5.6E-11 2.6E-05
100-42-5 Styrene 0 0 -8.8E+02 0.0E+00
127-18-4 Tetrachloroethylene 3.1 0.031 4.7E+01 3.5E+01 6.6E-10 1.8E-04
108-88-3 Toluene 2.3 0.023 -4.4E+03 1.1E-06
71-55-6 Trichloroethane, 1,1,1-0 0 -4.4E+03 0.0E+00
79-01-6 Trichloroethylene 4.1 0.041 3.0E+00 1.8E+00 1.4E-08 4.7E-0375-69-4 Trichlorofluoromethane 1.2 0.012 --95-63-6 Trimethylbenzene, 1,2,4-0 0 -5.3E+01 0.0E+0075-01-4 Vinyl Chloride 0 0 2.8E+00 8.8E+01 0.0E+00 0.0E+00
108-38-3 Xylene, m-0 0 -8.8E+01 0.0E+00
95-47-6 Xylene, o-0 0 -8.8E+01 0.0E+00
Cumulative:1.4E-08 5.1E-03
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
TW-3
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-3
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-3
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual) 1.0E-06
Target Cancer Risk (cumulative) 1.0E-04
Target Hazard Index (individual) 2.0E-01
Target Hazard Index (cumulative) 1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg) 15
Exposure Duration (ED) (yr) 6
Exposure Frequency (EF) (d/yr) 350
Exposure Time (ET) (hr) 24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day) 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d) 0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Exposure Duration (ED) (yr) 20
Exposure Frequency (EF) (d/yr) 350
Exposure Time (ET) (hr) 24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day) 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d) 2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Exposure Duration (ED) (yr) 25
Exposure Frequency (EF) (d/yr) 250
Exposure Time (ET) (hr) 8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day) 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d) 0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Working Weeks (EW) (wk/yr) 50
Exposure Duration (ED) (yr) 1
Exposure Frequency (EF) (d/yr) 250
Exposure Time (ET) (hr) 8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day) 330
1
70
80
330
1
250
8
3527
0.3
50
100
19652
2.5
0.71
1
20
350
24
6032
0.07
0.54
1
70
80
2373
0.2
200
6365
0.78
Input Form 1B
Exposure Unit ID: TW-3
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: TW-3
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr) 365 NA 365
Body Weight (BW) (kg) 15 NA 15
Exposure Duration 0-2 (ED) (yr) 2 NA 2
Exposure Duration 2-6 (ED) (yr) 4 NA 4
Exposure Frequency (EF) (d/yr) 195 NA 195
Exposure Time (ET) (hr) 2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day) 200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr) 0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day) 100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr) 0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)22 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021Basis: November 2020 EPA RSL TableSite ID: 24008-20-060Exposure Unit ID: TW-3Description of Exposure Point Concentration Selection:NOTE: If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculationsExposure Point Concentration (ug/L)Notes: CAS Number ChemicalMinimum Concentration (Qualifier)Maximum Concentration (Qualifier)UnitsLocation of Maximum ConcentrationDetection FrequencyRange of Detection LimitsConcentration Used for ScreeningBackground ValueScreening Toxicity Value (Screening Level) (n/c)Potential ARAR/TBC ValuePotential ARAR/TBC SourceCOPC Flag (Y/N)Rationale for Selection or Deletion2.1 67-64-1 Acetone ug/L0.84 7440-38-2 Arsenic, Inorganic ug/L100 7440-39-3 Bariumug/L2.4 16065-83-1 Chromium(III), Insoluble Salts ug/L1.4 7439-92-1 ~Lead and Compounds ug/L0.034 7439-97-6 ~Mercury (elemental) ug/LInput Form 2BGroundwater Exposure Point Concentration TableExposure point concentrations reflect maximum detection in site groundwater during Jnauary 6, 2021 groundwater sampling event.North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-3
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air 0.0E+00 3.8E-02 NO
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Groundwater to Indoor Air 0.0E+00 9.1E-03 NO
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060Exposure Unit ID: TW-3
CAS # Chemical Name:
Groundwater Concentration(ug/L)
Target Indoor
Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor
Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard Quotient
67-64-1 Acetone 2.1 - 6.5E+03 9.3E-087440-38-2 Arsenic, Inorganic 0.84 6.5E-04 3.1E-037440-39-3 Barium 100 - 1.0E-0116065-83-1 Chromium(III), Insoluble Salts 2.4 - -75-34-3 Dichloroethane, 1,1- 1.8E+00 -107-06-2 Dichloroethane, 1,2- 1.1E-01 1.5E+0075-35-4 Dichloroethylene, 1,1- - 4.2E+01156-59-2 Dichloroethylene, cis-1,2- - -123-91-1 Dioxane, 1,4- 5.6E-01 6.3E+0075-00-3 Ethyl Chloride (Chloroethane) - 2.1E+03
7439-92-1 ~Lead and Compounds 1.4 - -7439-97-6 ~Mercury (elemental) 0.034 - 6.3E-02 3.8E-02
1634-04-4 Methyl tert-Butyl Ether (MTBE) 1.1E+01 6.3E+027782-49-2 Selenium - 4.2E+00
127-18-4 Tetrachloroethylene 1.1E+01 8.3E+00108-88-3 Toluene - 1.0E+03
79-01-6 Trichloroethylene 4.8E-01 4.2E-0175-01-4 Vinyl Chloride 1.7E-01 2.1E+01
Cumulative: 0.0E+00 3.8E-02
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3A
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-3
CAS # Chemical Name:
Groundwater
Concentration
(ug/L)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard Quotient
67-64-1 Acetone 2.1 0.003004906 - 2.7E+04 2.2E-087440-38-2 Arsenic, Inorganic 0.84 2.9E-03 1.3E-027440-39-3 Barium 100 - 4.4E-0116065-83-1 Chromium(III), Insoluble Salts 2.4 - -
75-34-3 Dichloroethane, 1,1- 7.7E+00 -
107-06-2 Dichloroethane, 1,2- 4.7E-01 6.1E+00
75-35-4 Dichloroethylene, 1,1- - 1.8E+02
156-59-2 Dichloroethylene, cis-1,2- - -
123-91-1 Dioxane, 1,4- 2.5E+00 2.6E+01
75-00-3 Ethyl Chloride (Chloroethane) - 8.8E+037439-92-1 ~Lead and Compounds 1.4 - -7439-97-6 ~Mercury (elemental) 0.034 0.011968 - 2.6E-01 9.1E-03
1634-04-4 Methyl tert-Butyl Ether (MTBE) 4.7E+01 2.6E+03
7782-49-2 Selenium - 1.8E+01
127-18-4 Tetrachloroethylene 4.7E+01 3.5E+01
108-88-3 Toluene - 4.4E+03
79-01-6 Trichloroethylene 3.0E+00 1.8E+00
75-01-4 Vinyl Chloride 2.8E+00 8.8E+01
Cumulative: 0.0E+00 9.1E-03
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3D
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
TW-4
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-4
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-4
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual) 1.0E-06
Target Cancer Risk (cumulative) 1.0E-04
Target Hazard Index (individual) 2.0E-01
Target Hazard Index (cumulative) 1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg) 15
Exposure Duration (ED) (yr) 6
Exposure Frequency (EF) (d/yr) 350
Exposure Time (ET) (hr) 24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day) 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d) 0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Exposure Duration (ED) (yr) 20
Exposure Frequency (EF) (d/yr) 350
Exposure Time (ET) (hr) 24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day) 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d) 2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Exposure Duration (ED) (yr) 25
Exposure Frequency (EF) (d/yr) 250
Exposure Time (ET) (hr) 8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day) 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d) 0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Working Weeks (EW) (wk/yr) 50
Exposure Duration (ED) (yr) 1
Exposure Frequency (EF) (d/yr) 250
Exposure Time (ET) (hr) 8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day) 330
1
70
80
330
1
250
8
3527
0.3
50
100
19652
2.5
0.71
1
20
350
24
6032
0.07
0.54
1
70
80
2373
0.2
200
6365
0.78
Input Form 1B
Exposure Unit ID: TW-4
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: TW-4
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr) 365 NA 365
Body Weight (BW) (kg) 15 NA 15
Exposure Duration 0-2 (ED) (yr) 2 NA 2
Exposure Duration 2-6 (ED) (yr) 4 NA 4
Exposure Frequency (EF) (d/yr) 195 NA 195
Exposure Time (ET) (hr) 2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day) 200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr) 0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day) 100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr) 0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)22 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021Basis: November 2020 EPA RSL TableSite ID: 24008-20-060Exposure Unit ID: TW-4Description of Exposure Point Concentration Selection:NOTE: If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculationsExposure Point Concentration (ug/L)Notes: CAS Number ChemicalMinimum Concentration (Qualifier)Maximum Concentration (Qualifier)UnitsLocation of Maximum ConcentrationDetection FrequencyRange of Detection LimitsConcentration Used for ScreeningBackground ValueScreening Toxicity Value (Screening Level) (n/c)Potential ARAR/TBC ValuePotential ARAR/TBC SourceCOPC Flag (Y/N)Rationale for Selection or Deletion4.1 67-64-1 Acetone ug/L0.58 7440-38-2 Arsenic, Inorganic ug/L130 7440-39-3 Bariumug/L7.2 16065-83-1 Chromium(III), Insoluble Salts ug/L2.3 75-34-3 Dichloroethane, 1,1- ug/L0.87 75-35-4 Dichloroethylene, 1,1- ug/L0.78 156-59-2 Dichloroethylene, cis-1,2- ug/L25 123-91-1 Dioxane, 1,4- ug/L2.1 75-00-3 Ethyl Chloride (Chloroethane) ug/L4.2 7439-92-1 ~Lead and Compounds ug/L0.24 108-88-3 Toluene ug/L2.3 79-01-6 Trichloroethylene ug/L32 75-01-4 Vinyl Chloride ug/LInput Form 2BGroundwater Exposure Point Concentration TableExposure point concentrations reflect maximum detection in site groundwater during Jnauary 6, 2021 groundwater sampling event.North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-4
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air 2.2E-04 8.0E-01 YES
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Groundwater to Indoor Air 1.3E-05 1.9E-01 NO
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060Exposure Unit ID: TW-4
CAS # Chemical Name:
Groundwater Concentration(ug/L)
Target Indoor
Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor
Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard Quotient
67-64-1 Acetone 4.1 - 6.5E+03 1.8E-077440-38-2 Arsenic, Inorganic 0.58 6.5E-04 3.1E-037440-39-3 Barium 130 - 1.0E-0116065-83-1 Chromium(III), Insoluble Salts 7.2 - -75-34-3 Dichloroethane, 1,1- 2.3 1.8E+00 - 3.0E-07107-06-2 Dichloroethane, 1,2- 1.1E-01 1.5E+0075-35-4 Dichloroethylene, 1,1- 0.87 - 4.2E+01 4.5E-03156-59-2 Dichloroethylene, cis-1,2- 0.78 - -123-91-1 Dioxane, 1,4- 25 5.6E-01 6.3E+00 8.7E-09 1.6E-0475-00-3 Ethyl Chloride (Chloroethane) 2.1 - 2.1E+03 9.1E-05
7439-92-1 ~Lead and Compounds 4.2 - -7439-97-6 ~Mercury (elemental) - 6.3E-02
1634-04-4 Methyl tert-Butyl Ether (MTBE) 1.1E+01 6.3E+027782-49-2 Selenium - 4.2E+00
127-18-4 Tetrachloroethylene 1.1E+01 8.3E+00108-88-3 Toluene 0.24 - 1.0E+03 1.2E-05
79-01-6 Trichloroethylene 2.3 4.8E-01 4.2E-01 1.9E-06 4.4E-0175-01-4 Vinyl Chloride 32 1.7E-01 2.1E+01 2.2E-04 3.5E-01
Cumulative:2.2E-04 8.0E-01
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3A
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-4
CAS # Chemical Name:
Groundwater
Concentration
(ug/L)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard Quotient
67-64-1 Acetone 4.1 0.005866721 - 2.7E+04 4.3E-087440-38-2 Arsenic, Inorganic 0.58 2.9E-03 1.3E-027440-39-3 Barium 130 - 4.4E-0116065-83-1 Chromium(III), Insoluble Salts 7.2 - -
75-34-3 Dichloroethane, 1,1- 2.3 0.52845462 7.7E+00 - 6.9E-08
107-06-2 Dichloroethane, 1,2- 4.7E-01 6.1E+00
75-35-4 Dichloroethylene, 1,1- 0.87 0.928331971 - 1.8E+02 1.1E-03
156-59-2 Dichloroethylene, cis-1,2- 0.78 0.130106296 - -
123-91-1 Dioxane, 1,4- 25 0.004905969 2.5E+00 2.6E+01 2.0E-09 3.7E-05
75-00-3 Ethyl Chloride (Chloroethane) 2.1 0.952984464 - 8.8E+03 2.2E-057439-92-1 ~Lead and Compounds 4.2 - -7439-97-6 ~Mercury (elemental) - 2.6E-01
1634-04-4 Methyl tert-Butyl Ether (MTBE) 4.7E+01 2.6E+03
7782-49-2 Selenium - 1.8E+01
127-18-4 Tetrachloroethylene 4.7E+01 3.5E+01
108-88-3 Toluene 0.24 0.065151267 - 4.4E+03 3.0E-06
79-01-6 Trichloroethylene 2.3 0.926206051 3.0E+00 1.8E+00 3.1E-07 1.1E-01
75-01-4 Vinyl Chloride 32 36.36958299 2.8E+00 8.8E+01 1.3E-05 8.3E-02
Cumulative: 1.3E-05 1.9E-01
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3D
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
TW-5
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-5
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual) 1.0E-06
Target Cancer Risk (cumulative) 1.0E-04
Target Hazard Index (individual) 2.0E-01
Target Hazard Index (cumulative) 1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg) 15
Exposure Duration (ED) (yr) 6
Exposure Frequency (EF) (d/yr) 350
Exposure Time (ET) (hr) 24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day) 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d) 0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Exposure Duration (ED) (yr) 20
Exposure Frequency (EF) (d/yr) 350
Exposure Time (ET) (hr) 24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day) 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d) 2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Exposure Duration (ED) (yr) 25
Exposure Frequency (EF) (d/yr) 250
Exposure Time (ET) (hr) 8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day) 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d) 0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Working Weeks (EW) (wk/yr) 50
Exposure Duration (ED) (yr) 1
Exposure Frequency (EF) (d/yr) 250
Exposure Time (ET) (hr) 8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day) 330
1
70
80
330
1
250
8
3527
0.3
50
100
19652
2.5
0.71
1
20
350
24
6032
0.07
0.54
1
70
80
2373
0.2
200
6365
0.78
Input Form 1B
Exposure Unit ID: TW-5
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: TW-5
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr) 365 NA 365
Body Weight (BW) (kg) 15 NA 15
Exposure Duration 0-2 (ED) (yr) 2 NA 2
Exposure Duration 2-6 (ED) (yr) 4 NA 4
Exposure Frequency (EF) (d/yr) 195 NA 195
Exposure Time (ET) (hr) 2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day) 200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr) 0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day) 100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr) 0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)22 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021Basis: November 2020 EPA RSL TableSite ID: 24008-20-060Exposure Unit ID: TW-5Description of Exposure Point Concentration Selection:NOTE: If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculationsExposure Point Concentration (ug/L)Notes: CAS Number ChemicalMinimum Concentration (Qualifier)Maximum Concentration (Qualifier)UnitsLocation of Maximum ConcentrationDetection FrequencyRange of Detection LimitsConcentration Used for ScreeningBackground ValueScreening Toxicity Value (Screening Level) (n/c)Potential ARAR/TBC ValuePotential ARAR/TBC SourceCOPC Flag (Y/N)Rationale for Selection or Deletion1.3 67-64-1 Acetone ug/L0.55 7440-38-2 Arsenic, Inorganic ug/L160 7440-39-3 Bariumug/L2 16065-83-1 Chromium(III), Insoluble Salts ug/L2 75-34-3 Dichloroethane, 1,1- ug/L3.6 75-35-4 Dichloroethylene, 1,1- ug/L0.98 156-59-2 Dichloroethylene, cis-1,2- ug/L19 123-91-1 Dioxane, 1,4- ug/L0.67 7439-92-1 ~Lead and Compounds ug/L2.2 75-01-4 Vinyl Chloride ug/LInput Form 2BGroundwater Exposure Point Concentration TableExposure point concentrations reflect maximum detection in site groundwater during Jnauary 6, 2021 groundwater sampling event.North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-5
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air 1.5E-05 4.3E-02 NO
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Groundwater to Indoor Air 9.6E-07 1.0E-02 NO
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060Exposure Unit ID: TW-5
CAS # Chemical Name:
Groundwater Concentration(ug/L)
Target Indoor
Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor
Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard Quotient
67-64-1 Acetone 1.3 - 6.5E+03 5.8E-087440-38-2 Arsenic, Inorganic 0.55 6.5E-04 3.1E-037440-39-3 Barium 160 - 1.0E-0116065-83-1 Chromium(III), Insoluble Salts 2 - -75-34-3 Dichloroethane, 1,1- 2 1.8E+00 - 2.6E-07107-06-2 Dichloroethane, 1,2- 1.1E-01 1.5E+0075-35-4 Dichloroethylene, 1,1- 3.6 - 4.2E+01 1.8E-02156-59-2 Dichloroethylene, cis-1,2- 0.98 - -123-91-1 Dioxane, 1,4- 19 5.6E-01 6.3E+00 6.6E-09 1.2E-0475-00-3 Ethyl Chloride (Chloroethane) - 2.1E+03
7439-92-1 ~Lead and Compounds 0.67 - -7439-97-6 ~Mercury (elemental) - 6.3E-02
1634-04-4 Methyl tert-Butyl Ether (MTBE) 1.1E+01 6.3E+027782-49-2 Selenium - 4.2E+00
127-18-4 Tetrachloroethylene 1.1E+01 8.3E+00108-88-3 Toluene - 1.0E+03
79-01-6 Trichloroethylene 4.8E-01 4.2E-0175-01-4 Vinyl Chloride 2.2 1.7E-01 2.1E+01 1.5E-05 2.4E-02
Cumulative: 1.5E-05 4.3E-02
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3A
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-5
CAS # Chemical Name:
Groundwater
Concentration
(ug/L)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard Quotient
67-64-1 Acetone 1.3 0.00186018 - 2.7E+04 1.4E-087440-38-2 Arsenic, Inorganic 0.55 2.9E-03 1.3E-027440-39-3 Barium 160 - 4.4E-0116065-83-1 Chromium(III), Insoluble Salts 2 - -
75-34-3 Dichloroethane, 1,1- 2 0.459525756 7.7E+00 - 6.0E-08
107-06-2 Dichloroethane, 1,2- 4.7E-01 6.1E+00
75-35-4 Dichloroethylene, 1,1- 3.6 3.841373671 - 1.8E+02 4.4E-03
156-59-2 Dichloroethylene, cis-1,2- 0.98 0.163466885 - -
123-91-1 Dioxane, 1,4- 19 0.003728536 2.5E+00 2.6E+01 1.5E-09 2.8E-05
75-00-3 Ethyl Chloride (Chloroethane) - 8.8E+037439-92-1 ~Lead and Compounds 0.67 - -7439-97-6 ~Mercury (elemental) - 2.6E-01
1634-04-4 Methyl tert-Butyl Ether (MTBE) 4.7E+01 2.6E+03
7782-49-2 Selenium - 1.8E+01
127-18-4 Tetrachloroethylene 4.7E+01 3.5E+01
108-88-3 Toluene - 4.4E+03
79-01-6 Trichloroethylene 3.0E+00 1.8E+00
75-01-4 Vinyl Chloride 2.2 2.500408831 2.8E+00 8.8E+01 9.0E-07 5.7E-03
Cumulative: 9.6E-07 1.0E-02
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3D
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
TW-6
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-6
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual) 1.0E-06
Target Cancer Risk (cumulative) 1.0E-04
Target Hazard Index (individual) 2.0E-01
Target Hazard Index (cumulative) 1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg) 15
Exposure Duration (ED) (yr) 6
Exposure Frequency (EF) (d/yr) 350
Exposure Time (ET) (hr) 24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day) 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d) 0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Exposure Duration (ED) (yr) 20
Exposure Frequency (EF) (d/yr) 350
Exposure Time (ET) (hr) 24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day) 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d) 2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Exposure Duration (ED) (yr) 25
Exposure Frequency (EF) (d/yr) 250
Exposure Time (ET) (hr) 8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day) 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d) 0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Working Weeks (EW) (wk/yr) 50
Exposure Duration (ED) (yr) 1
Exposure Frequency (EF) (d/yr) 250
Exposure Time (ET) (hr) 8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day) 330
1
70
80
330
1
250
8
3527
0.3
50
100
19652
2.5
0.71
1
20
350
24
6032
0.07
0.54
1
70
80
2373
0.2
200
6365
0.78
Input Form 1B
Exposure Unit ID: TW-6
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: TW-6
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr) 365 NA 365
Body Weight (BW) (kg) 15 NA 15
Exposure Duration 0-2 (ED) (yr) 2 NA 2
Exposure Duration 2-6 (ED) (yr) 4 NA 4
Exposure Frequency (EF) (d/yr) 195 NA 195
Exposure Time (ET) (hr) 2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day) 200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr) 0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day) 100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr) 0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)22 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021Basis: November 2020 EPA RSL TableSite ID: 24008-20-060Exposure Unit ID: TW-6Description of Exposure Point Concentration Selection:NOTE: If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculationsExposure Point Concentration (ug/L)Notes: CAS Number ChemicalMinimum Concentration (Qualifier)Maximum Concentration (Qualifier)UnitsLocation of Maximum ConcentrationDetection FrequencyRange of Detection LimitsConcentration Used for ScreeningBackground ValueScreening Toxicity Value (Screening Level) (n/c)Potential ARAR/TBC ValuePotential ARAR/TBC SourceCOPC Flag (Y/N)Rationale for Selection or Deletion1.4 67-64-1 Acetone ug/L0.34 7440-38-2 Arsenic, Inorganic ug/L59 7440-39-3 Bariumug/L1.4 16065-83-1 Chromium(III), Insoluble Salts ug/L0.25 107-06-2 Dichloroethane, 1,2- ug/L0.038 7439-97-6 ~Mercury (elemental) ug/L1.1 7782-49-2 Selenium ug/L0.28 127-18-4 Tetrachloroethylene ug/LInput Form 2BGroundwater Exposure Point Concentration TableExposure point concentrations reflect maximum detection in site groundwater during Jnauary 6, 2021 groundwater sampling event.North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-6
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air 1.3E-07 4.9E-02 NO
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Groundwater to Indoor Air 3.0E-08 1.2E-02 NO
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060Exposure Unit ID: TW-6
CAS # Chemical Name:
Groundwater Concentration(ug/L)
Target Indoor
Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor
Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard Quotient
67-64-1 Acetone 1.4 - 6.5E+03 6.2E-087440-38-2 Arsenic, Inorganic 0.34 6.5E-04 3.1E-037440-39-3 Barium 59 - 1.0E-0116065-83-1 Chromium(III), Insoluble Salts 1.4 - -75-34-3 Dichloroethane, 1,1- 1.8E+00 -107-06-2 Dichloroethane, 1,2- 0.25 1.1E-01 1.5E+00 1.1E-07 1.7E-0375-35-4 Dichloroethylene, 1,1- - 4.2E+01156-59-2 Dichloroethylene, cis-1,2- - -123-91-1 Dioxane, 1,4- 5.6E-01 6.3E+0075-00-3 Ethyl Chloride (Chloroethane) - 2.1E+03
7439-92-1 ~Lead and Compounds - -7439-97-6 ~Mercury (elemental) 0.038 - 6.3E-02 4.3E-02
1634-04-4 Methyl tert-Butyl Ether (MTBE) 1.1E+01 6.3E+027782-49-2 Selenium 1.1 - 4.2E+00
127-18-4 Tetrachloroethylene 0.28 1.1E+01 8.3E+00 1.9E-08 4.9E-03108-88-3 Toluene - 1.0E+03
79-01-6 Trichloroethylene 4.8E-01 4.2E-0175-01-4 Vinyl Chloride 1.7E-01 2.1E+01
Cumulative: 1.3E-07 4.9E-02
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3A
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-6
CAS # Chemical Name:
Groundwater
Concentration
(ug/L)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard Quotient
67-64-1 Acetone 1.4 0.002003271 - 2.7E+04 1.5E-087440-38-2 Arsenic, Inorganic 0.34 2.9E-03 1.3E-027440-39-3 Barium 59 - 4.4E-0116065-83-1 Chromium(III), Insoluble Salts 1.4 - -
75-34-3 Dichloroethane, 1,1- 7.7E+00 -
107-06-2 Dichloroethane, 1,2- 0.25 0.012060507 4.7E-01 6.1E+00 2.6E-08 3.9E-04
75-35-4 Dichloroethylene, 1,1- - 1.8E+02
156-59-2 Dichloroethylene, cis-1,2- - -
123-91-1 Dioxane, 1,4- 2.5E+00 2.6E+01
75-00-3 Ethyl Chloride (Chloroethane) - 8.8E+037439-92-1 ~Lead and Compounds - -7439-97-6 ~Mercury (elemental) 0.038 0.013376 - 2.6E-01 1.0E-02
1634-04-4 Methyl tert-Butyl Ether (MTBE) 4.7E+01 2.6E+03
7782-49-2 Selenium 1.1 - 1.8E+01
127-18-4 Tetrachloroethylene 0.28 0.202616517 4.7E+01 3.5E+01 4.3E-09 1.2E-03
108-88-3 Toluene - 4.4E+03
79-01-6 Trichloroethylene 3.0E+00 1.8E+00
75-01-4 Vinyl Chloride 2.8E+00 8.8E+01
Cumulative: 3.0E-08 1.2E-02
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3D
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
2/25/2021
Prepared By:Ayla Homer
Hart & Hickman
Matt Ingalls
TW-7
North Carolina Department of Environmental Quality
Risk Calculator
Selles Bagwell Brownfields Property
S. Tryon St. and Distribution St.
Brownfields
24008-20-060
January 2021
November 2020 EPA RSL Table
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-7
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual) 1.0E-06
Target Cancer Risk (cumulative) 1.0E-04
Target Hazard Index (individual) 2.0E-01
Target Hazard Index (cumulative) 1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg) 15
Exposure Duration (ED) (yr) 6
Exposure Frequency (EF) (d/yr) 350
Exposure Time (ET) (hr) 24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day) 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d) 0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Exposure Duration (ED) (yr) 20
Exposure Frequency (EF) (d/yr) 350
Exposure Time (ET) (hr) 24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day) 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d) 2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Exposure Duration (ED) (yr) 25
Exposure Frequency (EF) (d/yr) 250
Exposure Time (ET) (hr) 8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day) 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d) 0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day) 1
Lifetime (LT) (years)70
Body Weight (BW) (kg) 80
Working Weeks (EW) (wk/yr) 50
Exposure Duration (ED) (yr) 1
Exposure Frequency (EF) (d/yr) 250
Exposure Time (ET) (hr) 8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day) 330
1
70
80
330
1
250
8
3527
0.3
50
100
19652
2.5
0.71
1
20
350
24
6032
0.07
0.54
1
70
80
2373
0.2
200
6365
0.78
Input Form 1B
Exposure Unit ID: TW-7
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: TW-7
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr) 365 NA 365
Body Weight (BW) (kg) 15 NA 15
Exposure Duration 0-2 (ED) (yr) 2 NA 2
Exposure Duration 2-6 (ED) (yr) 4 NA 4
Exposure Frequency (EF) (d/yr) 195 NA 195
Exposure Time (ET) (hr) 2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day) 200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr) 0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day) 100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr) 0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)22 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021Basis: November 2020 EPA RSL TableSite ID: 24008-20-060Exposure Unit ID: TW-7Description of Exposure Point Concentration Selection:NOTE: If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculationsExposure Point Concentration (ug/L)Notes: CAS Number ChemicalMinimum Concentration (Qualifier)Maximum Concentration (Qualifier)UnitsLocation of Maximum ConcentrationDetection FrequencyRange of Detection LimitsConcentration Used for ScreeningBackground ValueScreening Toxicity Value (Screening Level) (n/c)Potential ARAR/TBC ValuePotential ARAR/TBC SourceCOPC Flag (Y/N)Rationale for Selection or Deletion2.4 67-64-1 Acetone ug/L4.8 7440-38-2 Arsenic, Inorganic ug/L130 7440-39-3 Bariumug/L4.1 16065-83-1 Chromium(III), Insoluble Salts ug/L6.9 7439-92-1 ~Lead and Compounds ug/L0.3 1634-04-4 Methyl tert-Butyl Ether (MTBE) ug/LInput Form 2BGroundwater Exposure Point Concentration TableExposure point concentrations reflect maximum detection in site groundwater during Jnauary 6, 2021 groundwater sampling event.North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-7
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air 6.7E-10 2.4E-06 NO
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Groundwater to Indoor Air 1.5E-10 5.7E-07 NO
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060Exposure Unit ID: TW-7
CAS # Chemical Name:
Groundwater Concentration(ug/L)
Target Indoor
Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor
Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard Quotient
67-64-1 Acetone 2.4 - 6.5E+03 1.1E-077440-38-2 Arsenic, Inorganic 4.8 6.5E-04 3.1E-037440-39-3 Barium 130 - 1.0E-0116065-83-1 Chromium(III), Insoluble Salts 4.1 - -75-34-3 Dichloroethane, 1,1- 1.8E+00 -107-06-2 Dichloroethane, 1,2- 1.1E-01 1.5E+0075-35-4 Dichloroethylene, 1,1- - 4.2E+01156-59-2 Dichloroethylene, cis-1,2- - -123-91-1 Dioxane, 1,4- 5.6E-01 6.3E+0075-00-3 Ethyl Chloride (Chloroethane) - 2.1E+03
7439-92-1 ~Lead and Compounds 6.9 - -7439-97-6 ~Mercury (elemental) - 6.3E-02
1634-04-4 Methyl tert-Butyl Ether (MTBE) 0.3 1.1E+01 6.3E+02 6.7E-10 2.3E-067782-49-2 Selenium - 4.2E+00
127-18-4 Tetrachloroethylene 1.1E+01 8.3E+00108-88-3 Toluene - 1.0E+03
79-01-6 Trichloroethylene 4.8E-01 4.2E-0175-01-4 Vinyl Chloride 1.7E-01 2.1E+01
Cumulative: 6.7E-10 2.4E-06
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3A
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Groundwater to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24008-20-060
Exposure Unit ID: TW-7
CAS # Chemical Name:
Groundwater
Concentration
(ug/L)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard Quotient
67-64-1 Acetone 2.4 0.003434178 - 2.7E+04 2.5E-087440-38-2 Arsenic, Inorganic 4.8 2.9E-03 1.3E-027440-39-3 Barium 130 - 4.4E-0116065-83-1 Chromium(III), Insoluble Salts 4.1 - -
75-34-3 Dichloroethane, 1,1- 7.7E+00 -
107-06-2 Dichloroethane, 1,2- 4.7E-01 6.1E+00
75-35-4 Dichloroethylene, 1,1- - 1.8E+02
156-59-2 Dichloroethylene, cis-1,2- - -
123-91-1 Dioxane, 1,4- 2.5E+00 2.6E+01
75-00-3 Ethyl Chloride (Chloroethane) - 8.8E+037439-92-1 ~Lead and Compounds 6.9 - -7439-97-6 ~Mercury (elemental) - 2.6E-01
1634-04-4 Methyl tert-Butyl Ether (MTBE) 0.3 0.007199509 4.7E+01 2.6E+03 1.5E-10 5.5E-07
7782-49-2 Selenium - 1.8E+01
127-18-4 Tetrachloroethylene 4.7E+01 3.5E+01
108-88-3 Toluene - 4.4E+03
79-01-6 Trichloroethylene 3.0E+00 1.8E+00
75-01-4 Vinyl Chloride 2.8E+00 8.8E+01
Cumulative: 1.5E-10 5.7E-07
Groundwater concentrations are in ug/L. Air concentrations are in ug/m3.
Output Form 3D
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator