10036_South End Transit_Sampling Result Letter-FINAL_borrow pit-OCR

Professional Service Industries, Inc. ● 5021 West W.T. Harris Boulevard, Charlotte, NC 28269 ● Phone [phone] ● Fax [phone]

January 13, 2012

VIA EMAIL ONLY

Mr. Tony Duque
NC Brownfields Program
1646 Mail Service Center, Room 3409-K
Raleigh NC 27699-1646

RE: Borrow Site Soil Sampling Results
Approximately 11 Acre Transit-Oriented, Multi-Family Residential Project Located at
2405 Dunavant Street (Approximately) in Charlotte, North Carolina (the “Property”)

Tony:

As outlined in the January 3, 2012 Soil Sampling Plan, PSI has collected an additional six (6)
soil samples from the proposed borrow site at the Charlotte-Douglas Airport. The purpose of
this sampling event is to determine if the soils from the borrow site are suitable for use as
certified clean fill for the above-referenced Brownfield site.

PSI collected six (6) soil samples on January 6, 2012. The samples were collected from three
(3) test pits (TP-3, TP-4 and TP-5). All six (6) soil samples were placed in laboratory provided
containers placed in a shipping container with ice and shipped to a North Carolina certified
laboratory under chain-of-custody protocol. Each of the soil samples were analyzed for
volatile organic compounds (VOCs) by EPA Method 8260B, semivolatile organic compounds
(SVOCs) by EPA Method 8270D, organochlorine pesticides by EPA Method 8081B,
polychlorinated biphenyls (PCBs) by EPA Method 8082A, and RCRA 8 Metals by EPA
Method 6010C/7471B. The laboratory analytical report is provided as an attachment to this
letter.

The following is a summary of the analytical results for the additional soil samples collected
from the borrow site, followed by a brief summary of the preliminary soil sample analytical
results:

Test Pit - 3
Three (3) soil samples (TP-3-SS-1, TP-3-SS-2 and TP-3-SS-3) were collected from Test Pit-
3. Each of the soil samples were collected as composite samples. TP-3-SS-1 was collected
from 1 to 1.5-feet below ground surface (bgs), TP-3-SS-2 was collected from 3 to 3.5-feet
bgs, and TP-13-SS-3 was collected from 7 to 7.5 feet bgs. The analytical results for the three

JLB Partners, LLC
Borrow Site Soil Sampling Results, Charlotte NC
PSI Project No: 0457116
January 13, 2012
Page 2 of 4
soil samples from Test Pit-3 reported diethyl ether and methylene chloride above method
detection limits but below the Inactive Hazardous Sites Branch (IHSB) Preliminary Health-
Based Residential Soil Remediation Goals (SRGs). The laboratory results also indicated that
no SVOCs, organochloride pesticides, or PCBs were detected above method detection limits
for the three soil samples. Of the RCRA 8 metals, only barium, chromium, and lead were
detected above method detection limits in the three soil samples. Mercury was detected in
soil samples TP-3-SS-1 and TP-3-SS-2; and silver and cadmium were detected in soil
samples TP-3-SS-1 and TP-3-SS-2, respectively. The reported concentration of each of the
detected metals is below the IHSB Preliminary Health-Based Residential SRGs.

Test Pit - 4
The two (2) soil samples (TP-4-SS-1 and TP-4-SS-2) were collected from Test Pit-4. Each of
the soil samples were collected as composite samples. TP-4-SS-1 was collected from 1 to
1.5-feet bgs and TP-4-SS-2 was collected from 3 to 3.5-feet bgs. The analytical results from
the two soil samples from Test Pit-4 reported diethyl ether and methylene chloride at
concentrations above the method detection limits but below the IHSB Preliminary Health-
Based Residential SRGs. The laboratory results also indicated that no SVOCs,
organochlorine pesticides, or PCBs were detected above method detection limits for both of
the soil samples. The analytical results for the RCRA metals barium, chromium, lead and
mercury were reported at concentrations above the method detection limits but below the
IHSB Preliminary Health-Based Residential SRGs.

Test Pit - 5
One (1) soil sample (TP-5-SS-1) was collected from Test Pit-5. The soil sample was collected
as a composite sample from 1 to 1.5-feet bgs. The analytical results for the soil sample
collected from Test Pit-5 reported diethyl ether and methylene chloride at concentrations
above method detection limits but below the IHSB Preliminary Health-Based Residential
SRGs. The laboratory results also indicated that no SVOCs, organochloride pesticides, or
PCBs were detected above the method detection limits. The RCRA metals barium,
chromium, lead and mercury were detected above the method detection limits in the soil
sample; however, the concentration of each of the detected metals is below the IHSB
Preliminary Health-Based Residential SRGs.

Preliminary Soil Sampling Results

On December 15, 2011, PSI collected five (5) preliminary soil samples at the proposed fill
site. Three (3) of the soil samples were collected in the area of deep cut (Area-1). Two (2)
additional soil samples were collected in the southwest corner of the proposed fill site in the
area of shallower cut (Area-2). The samples were collected from two test pits excavated by a
backhoe.

Three (3) soil samples (TP-1-SS-1, TP-1-SS-2, and TP-1-SS-3) were collected from Area-1.
The first sample (TP-1-SS-1) was collected between 1 and 3-feet below ground surface
(bgs), the second sample (TP-1-SS-2) was collected between 4 and 6- feet bgs, and the third

JLB Partners, LLC
Borrow Site Soil Sampling Results, Charlotte NC
PSI Project No: 0457116
January 13, 2012
Page 3 of 4
soil sample (TP-1-SS-3) was collected between 8 and 10-feet bgs. Two (2) soil samples (TP-
2-SS-1 and TP-2-SS-2) were collected from Area-2. The first sample (TP-2-SS-1) was
collected between 1 and 1.5-feet bgs and the second sample (TP-2-SS-2) was collected
between 3 and 3.5-feet bgs.

All five (5) soil samples were placed in laboratory provided containers placed in a shipping
container with ice and shipped to a North Carolina certified laboratory under chain-of-custody
protocol. Each of the soil samples were analyzed for VOCs by EPA Method 8260B, SVOCs
by EPA Method 8270D, organochlorine pesticides by EPA Method 8081B, PCBs by EPA
Method 8082A, and RCRA 8 Metals by EPA Method 6010C/7471B.

The following is a brief summary of the analytical results from the five (5) preliminary soil
samples collected from Area-1 and Area-2 on December 15, 2011:

Area-1: Area of Deeper Cut
The analytical results for the three soil samples collected from Area-1 reported methylene
chloride at concentrations above method detection limits but below the IHSB Preliminary
Health-Based Residential SRGs. Similarly, naphthalene was detected in soil sample TP-1-
SS-1 at a concentration above method detection limits but below the IHSB Preliminary
Residential Health-Based SRGs. The laboratory results also indicated that no SVOCs,
organochlorine pesticides, or PCBs were detected above method detection limits for all three
soil samples. The analytical results for the RCRA metals, barium, chromium, lead, and
mercury were detected above method detection limits but below the IHSB Preliminary Health-
Based Residential SRGs.

Area-2: Area of Shallower Cut
The analytical results for the two soil samples collected from Area-2 reported methylene
chloride above method detection limits but below the IHSB Preliminary Health-Based
Residential SRGs. Similarly, acetone was detected in soil sample TP-2-SS-1 above method
detection limit but below the IHSB Preliminary Residential Health-Based SRG. The laboratory
results also indicated that no SVOCs, organochloride pesticides, or PCBs were detected
above method detection limits for both of the soil samples. For the RCRA metals, barium,
chromium, lead, and mercury were detected at concentrations above method detection limits
in the two soil samples but below the IHSB Preliminary Health-Based Residential SRGs.

JLB Partners, LLC
Borrow Site Soil Sampling Results, Charlotte NC
PSI Project No: 0457116
January 13, 2012
Page 4 of 4

Based on the findings from the sampling events conducted on December 15, 2011 and
January 6, 2012, PSI believes that the soil from the proposed borrow site may be certified as
clean fill as defined by the Brownfields Program.

If you have any questions regarding this correspondence please feel free to contact me.

Respectfully submitted,
PROFESSIONAL SERVICE INDUSTRIES, INC.

Bryan M. Lucas Donna Cline, P.E. (FL)
Senior Project Manager Principal Consultant

Enclosures

Cc: Mr. Scott Schlosser (via email only, w/encls)
Carol Jones Van Buren, Esq. (via email only, w/encls)

SOIL ANALYTICAL RESULTS

JANUARY 6, 2012

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SOIL ANALYTICAL RESULTS

DECEMBER 15, 2011
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