HomeMy WebLinkAbout18002_Precisoin Dynamics_05-08-2019_Beneficial Reuse
May 8, 2019
Ms. Carolyn Minnich, Brownfields Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Program
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Subject: Beneficial Reuse Soil Assessment Report
Former Precision Dynamics
1033 Carter Avenue
Charlotte, North Carolina
Brownfields Project Number 18002-14-060
Dear Ms. Minnich:
On behalf of Heist Brewing Co, LLC, Mr. John Maas is pleased to submit this Beneficial Use Soil
Assessment Report outlining work activities performed at the above-referenced site. Included in
this report is an outline of our understanding of the project information, description of the
assessment activities, analytical results, and conclusions and recommendations. The following
was completed in accordance with the work plan established via email (approved February 28,
2019). We are available at your convenience to discuss the contents of this report and other
aspects of the project.
Sincerely,
John R. Maas, PG
Geologist
Registered, NC #2399
Cc: Mr. Kurt Hogan, Heist Brewing Co, LLC
Beneficial Reuse Soil Assessment Report May 7, 2019
Former Precision Dynamics
Charlotte, North Carolina
Brownfields Project Number 18002-14-060
ii
TABLE OF CONTENTS
1.0 PROJECT INFORMATION AND PURPOSE ........................................................................ 1
2.0 ASSESSMENT ACTIVITIES ................................................................................................ 2
2.1 Boring Layout ................................................................................................................. 2
2.2 Soil Assessment and Analysis ........................................................................................ 2
3.0 RESULTS ............................................................................................................................ 3
3.1 Volatile Organic Compounds .......................................................................................... 3
3.2 Semi-Volatile Organic Compounds ................................................................................. 3
3.3 Total Metals .................................................................................................................... 3
4.0 CONCLUSIONS AND RECOMMENDATIONS ..................................................................... 4
TABLE 1
FIGURE 1
APPENDIX
LIST OF TABLES
Table 1 Summary of Soil Sample Results
LIST OF FIGURES
Figure 1 Site Layout and Sample Location Map
APPENDIX
Laboratory Analytical Report and Chain-of-Custody Form
Beneficial Reuse Soil Assessment Report May 8, 2019
Former Precision Dynamics
Charlotte, North Carolina
Brownfields Project Number 18002-14-060
1.0 PROJECT INFORMATION AND PURPOSE
On behalf of Heist Brewing Co, LLC (Heist Brewing), Mr. John Maas, PG is pleased to submit this
Beneficial Use Soil Assessment Report outlining work activities performed at the above-
referenced site. The subject site consists of one parcel encompassing approximately 2.27 acres
situated between Carter Avenue and Woodward Avenue east of Statesville Avenue (Figure 1).
Heist Brewery recently expressed interest in grading mounded soil the northwest corner of their
parking lot area to reduce the ground surface elevation to be level with the surrounding parking
lot area. Soil excavated during grading will require export to an off-site location. To evaluate
potential soil export options, it was necessary to perform characterization of the soil that will
likely need to be exported off-site. According to the information provided to Mr. Maas, the
reduction of the grade elevation will range from 0.5 at the soil mound edges to approximately 4
feet at the soil mound center. The mounded soil area is approximately 40 feet by 140 feet.
Assuming an average thickness of 2 to 2.5 feet, it is conservatively anticipated that 400 to 500
cubic yards of soil would be removed.
Mr. Maas developed a work plan summarized via email (dated February 27, 2019) and submitted
the work plan to the North Carolina Department of Environmental Quality (NCDEQ), Division of
Waste Management (DWM), Brownfields Program (BFP) for review. Ms. Carolyn Minnich of the
BFP approved the work plan on February 28, 2019. The plan was developed to provide a scope
of work relative to the assessment of the grading planned for the subject property. The strategy
for characterization of the soil to be generated during grading was developed according to the
property’s established Environmental Management Plan (EMP). The assessment activities were
performed in general accordance with the most recent Inactive Hazardous Sites Branch (IHSB)
Program Guidelines for Assessment and Cleanup
(http://portal.ncdenr.org/web/wm/sf/ihs/ihsguide), dated October 2015 and the most recent
versions of the U.S. Environmental Protection Agency (EPA) Region IV Science and Ecosystem
Support Division (SESD) Field Branches Quality System and Technical Procedures guidance.
Beneficial Reuse Soil Assessment Report May 8, 2019
Former Precision Dynamics
Charlotte, North Carolina
Brownfields Project Number 18002-14-060
2.0 ASSESSMENT ACTIVITIES
2.1 Boring Layout
In the work plan for assessment, Mr. Maas proposed to advance three soil borings within the
proposed area of soil removal (Figure 1). The purpose of the soil assessment/characterization
effort was to evaluate soil in the depth horizon beginning at the existing grade and extending to
four feet or less below the existing grade for the presence of contaminants. The purpose of the
soil characterization is to evaluate if concentrations of contaminants are identified in the soil to
be exported that exceed the Inactive Hazardous Sites Branch (IHSB) Preliminary Soil
Remediation Goals (PSRGs) for Health Based Residential/Industrial or Protection of Groundwater
(PoG).
2.2 Soil Assessment and Analysis
On March 3, 2019, Mr. Maas mobilized to the subject property to advance soil borings as
approved by NCDEQ. Soil borings were advanced via a stainless steel hand auger to the
approximate depth of the existing surrounding parking lot grade. Mr. Maas collected the soil at
each boring location from the depth range shown on the cut/fill analysis and Table 1. Soil was
were removed from the hand auger and visual and olfactory observations relative to the soil
samples were recorded by our field personnel.
To select a “discrete grab” sample to be retained for analysis of Volatile Organic Compounds
(VOCs), Mr. Maas collected soil at one-foot intervals within each soil boring. Soil was placed in a
re-sealable plastic bag to be screened in the field using a photoionization detector (PID). The
results of the field screening ranged from non-detectable to 0.3 parts per million (ppm) and
were recorded by Mr. Maas. Based on the results of the field screening, one “discrete grab”
sample was selected from soil boring B-2 from 0-1 feet for laboratory analysis for VOCs using
EPA Method 8260D.
Soils observed were identified as exhibiting homogeneous characteristics in each of the three
borings. Soils were identified as fill material consisting of a red brown, moist silty clay with some
Beneficial Reuse Soil Assessment Report May 8, 2019
Former Precision Dynamics
Charlotte, North Carolina
Brownfields Project Number 18002-14-060
gravel, asphalt, and wood material. Groundwater was not encountered during this assessment.
Soil boring information is provided as follows:
B-1
Total depth: 2 feet
PID Screening Values: 0-1 feet <0.1 ppm; 1-2 feet 0.1 ppm
B-2
Total depth: 3 feet (refusal at 3 feet due to rock or asphalt)
PID Screening Values: 0-1 feet 0.3 ppm; 1-2 feet 0.2 ppm; 2-3 feet 0.1 ppm
B-3
Total depth: 2 feet
PID Screening Values: 0-1 feet <0.1 ppm; 1-2 feet <0.1 ppm
Regarding the sample to be retained for analysis of Semi-volatile Organic Compounds (SVOCs)
and total metals, the remaining bagged portions of the soil collected from the one-foot depth
intervals were composited in a clean, stainless steel bowl and placed in laboratory sample
containers, as shown on Table 1. The “composite” soil sample was placed into laboratory-
provided containers for analysis of SVOCs by EPA Method 8270D, Hazardous Site List (HSL)
Metals (total) by EPA Method 6020B/7471B, and hexavalent chromium by EPA Method 7196A.
The soil samples were placed in a cooler with ice and delivered to Prism Analytical Laboratory
(Prism) in Charlotte, North Carolina. Soil samples were maintained under a chain-of-custody
protocol. No duplicate or other QA/QC samples were required in the approved work plan.
Following the completion of the soil sampling activities, the borings were backfilled with the soil
cuttings from each respective boring to the ground surface.
Beneficial Reuse Soil Assessment Report May 8, 2019
Former Precision Dynamics
Charlotte, North Carolina
Brownfields Project Number 18002-14-060
3.0 RESULTS
The results of the laboratory analysis are summarized on Table 1. The laboratory reports are
included as an Appendix to this report. The following subsections include discussion of the
findings.
3.1 Volatile Organic Compounds
The results of the laboratory analysis for VOCs are summarized on Table 1. Detectable
concentrations did not exceed the applicable IHSB PSRGs for Health Based Residential, Health
Based Industrial/Commercial or PoG.
3.2 Semi-Volatile Organic Compounds
The results of the laboratory analysis for SVOCs are summarized on Table 1. Detectable
concentrations did not exceed the applicable IHSB PSRGs for Health Based Residential, Health
Based Industrial/Commercial or PoG.
3.3 Total Metals
The results of the laboratory analysis for total metals are summarized on Table 1. The analysis
identified the following:
• Concentrations of specific metals were identified in soil samples collected for this
assessment. Concentrations were identified that exceeded either the IHSB Health Based
Residential or PoG PSRGs. Concentrations identified did not exceed the IHSB Health
Based Industrial/Commercial PSRGs.
• A detectable concentration of total arsenic of 2.7 mg/kg was identified in the composite
soil sample. This concentration exceeded the IHSB Health Based Residential PSRG of
0.68 mg/kg, but did not exceed the IHSB, Health Based Industrial/Commercial or PoG
PSRGs. According to published literature, this concentration is within the typical range of
“naturally-occurring” arsenic levels in soil in the Piedmont of North Carolina.
• A detectable concentration of total manganese of 330 mg/kg was identified in the
composite soil sample. This concentration exceeded the IHSB PoG PSRG of 65 mg/kg
but did not exceed the IHSB Health Based Residential or Industrial/Commercial PSRGs.
Beneficial Reuse Soil Assessment Report May 8, 2019
Former Precision Dynamics
Charlotte, North Carolina
Brownfields Project Number 18002-14-060
According to published literature, this concentration is within the typical range of
“naturally-occurring” manganese levels in soil in the Piedmont of North Carolina.
4.0 CONCLUSIONS AND RECOMMENDATIONS
Based on the findings of this assessment, the following conclusions and recommendations are
offered:
• The borings did encounter gravel, asphalt, and wood fill that should not be considered
soil. It is understood that these material may be removed during “stripping” operations
depending on the intended use of the soil after removal.
• An Environmental Management Plan (EMP) exists for the BFP and should be reviewed by
contractors involved in the removal prior to the initiation of grading at the site.
• Detectable concentrations of VOCs and SVOCs did not exceed the applicable IHSB
PSRGs for Health Based Residential, Health Based Industrial/Commercial or PoG.
• The composite soil sample collected from the three soil borings contained a
concentration of total aresenic that exceeded the IHSB Health Based Residential PSRG.
Arsenic is an element found naturally in rocks, soil, plants, and animals, including
people. According to published literature, the identified total arsenic concentration is
within the typical range of “naturally-occurring” arsenic levels in soil in the Piedmont of
North Carolina.
• The composite soil sample collected from the three soil borings contained a
concentration of total manganese that exceeded the IHSB PoG PSRG. Manganese is an
element found naturally in rocks, soil, plants, and animals, including people. According
to published literature, the identified total manganese concentration is within the typical
range of “naturally-occurring” manganese levels in soil in the Piedmont of North
Carolina.
• Based on the results of this assessment, the soil at the property could be used as fill
material at the subject property or transported to another Brownfields property
(contingent on approval of the BFP and property owner/recipient) if the use of the
affected soil as beneficial fill will not increase the potential for risk to human health at
that site. Furthermore, the BFP may approve relocation of material that meets the
Beneficial Fill Rule to non-Brownfields properties.
Beneficial Reuse Soil Assessment Report May 8, 2019
Former Precision Dynamics
Charlotte, North Carolina
Brownfields Project Number 18002-14-060
TABLE
Constituent Soil Composite
HSL Metals (Composite of B-1, B-2, B-3; 0'-3')Range Mean
Antimony 0.35 U 6.3 93.0 0.9 <1.0-8.8 0.76
Arsenic 2.7 0.68 3.0 5.8 1.0-40*NE
Beryllium 0.62 3100 47000 580 50-1000 356
Cadmium 0.076 J 14 200 3 0.01-7.0*NE
Chromium**54 23,000 350,000 360,000 7-300 65
Chromium, Hexavalent 0.15 J 0.31 6.5 3.8 NE NE
Copper 70 630 9,300 700 3.0-100 34
Lead 40 400 800 250 2-200*NE
Manganese 330 380 5,600 65 8.0-3,394 594
Mercury 0.24 2.3 9.7 1.0 0.03-0.52 0.121
Nickel 22 310 4,700 130.0 <0.1-150 23
Zinc 77 4,700 70,000 1,200 25-124 56
Semi-Volatile Organic Compounds (SVOCs) (Composite of B-1, B-2, B-3; 0'-3')
Benzo(a)anthracene 0.11 J 1.1 21 0.35
Benzo(a)pyrene 0.081 J 0.11 2.1 0.12
Benzo(b)fluoranthene 0.14 1.1 21 1.2
Benzo(g,h,i)perylene 0.063 J NE NE 15600
Chrysene 0.12 J 110 2100 36
Fluoranthene 0.26 J 480 6000 670
Indeno(1,2,3-cd)pyrene 0.066 J 1.1 21 3.9
Phenanthrene 0.12 J NE NE 134
Pyrene 0.21 J 360 4500 440
Acetone 0.42 12,000 140,000 25
Methyl Butyl Ketone (2-Hexanone)0.032 J 42 280 0.18
Methyl Ethyl Ketone (2-Butanone)0.052 J 5,500 40000.0 17
Notes:
1. Concentrations shown in milligrams per kilograms (mg/kg) relative to the Reporting Limit (RL).
2. Samples collected on March 3, 2019.
3. Depths shown in feet below ground surface (bgs).
4. North Carolina Department of Environmental Quality (NCDEQ) Inactive Hazardous Sites Branch (IHSB) Preliminary Soil Remediation Goals (PSRG) dated February 2018.
5. Only detections above laboratory reporting limits and J-flagged results are shown.
6. J = Indicates that compound was detected at a concentration below the Reporting Limit (Lowest Calibration standard). Therefore, result is an estimated concentration.
7. U = Not detected at the method detection limit.
8. NE- Not established.
9. Bold font indicates identified concentration exceeded Residential PSRG.
10. Shaded gray cell indicates concentration exceeded Protection of Groundwater (PoG) PSRG.
11. Underlined value indicates concentration exceeded Industrial/Commercial PSRG.
12. HSL Metals summarized in this table are the same list as summarized in the Hart & Hickman Additioanl Soil Assessment report dated May 12, 2014.
(1) Range and mean values for "Background Metals for North Carolina Soils" taken from Elements in North American Soils by Dragun and Chekiri, 2005.
*Typical Range of "Native Soil Concentrations of Various Elements" as taken from The Soil Chemistry of Hazardous Materials, Dragun, James, 1988.
** Chromium (III) screening criteria used as Chromium (VI) analyzed separately.
Volitile Organic Compounds (VOCs) (Collected from B-2; 0'-1')
Not Applicable
Table 1: Summary of Soil Analytical Results (Brownfields Assessment)
Former Precision Dynamics
Charlotte, North Carolina
Brownfields Project Number: 18002-14-060
Not Applicable
Regional Background Metals in Soil(1)
NCDEQ IHSB
Residential
Health Based
PSRG
NCDEQ IHSB
Industrial/
Commercial
Health Based
PSRG
NCDEQ IHSB
Protection of
Groundwater
PSRG
Beneficial Reuse Soil Assessment Report May 8, 2019
Former Precision Dynamics
Charlotte, North Carolina
Brownfields Project Number 18002-14-060
FIGURE
µ0 0.006 0.0120.003 Miles
Date Printed: 5/7/2019 7:14:58 PM
This map or report is prepared for the inventory of real property within Mecklenburg County and is compiled from recorded deeds, plats, tax maps, surveys, planimetric maps, and other public records and data. Users of this map or report are hereby notified that the aforementioned public primary information sources should be consulted for verification. Mecklenburg County and its mapping contractors assume no legal responsibility for the information contained herein.
Polaris 3G Map – Mecklenburg County, North Carolina
Beneficial Reuse Soil Assessment Report May 8, 2019
Former Precision Dynamics
Charlotte, North Carolina
Brownfields Project Number 18002-14-060
APPENDIX
LABORATORY ANALYTICAL REPORTS AND CHAIN-OF-CUSTODY FORMS
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